diff --git a/.browserslistrc b/.browserslistrc
deleted file mode 100644
index d6471a38..00000000
--- a/.browserslistrc
+++ /dev/null
@@ -1,2 +0,0 @@
-> 1%
-last 2 versions
diff --git a/.clang-format b/.clang-format
new file mode 100644
index 00000000..05082f85
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,8 @@
+# https://github.com/microsoft/vscode-cpptools/issues/932
+NamespaceIndentation: None
+IndentWidth: 4
+AccessModifierOffset: -4
+PointerAlignment: Left
+
+# https://stackoverflow.com/questions/29477654/how-to-make-clang-format-add-new-line-before-opening-brace-of-a-function
+BreakBeforeBraces: Stroustrup
diff --git a/.eslintrc.js b/.eslintrc.js
deleted file mode 100644
index 761b3cdb..00000000
--- a/.eslintrc.js
+++ /dev/null
@@ -1,24 +0,0 @@
-module.exports = {
-	root: true,
-	env: {
-		node: true
-	},
-	extends: [
-		"plugin:vue/essential",
-		"eslint:recommended",
-		"@vue/prettier",
-		"@vue/typescript"
-	],
-	rules: {
-		// "no-console": process.env.NODE_ENV === "production" ? "error" : "off",
-		// "no-debugger": process.env.NODE_ENV === "production" ? "error" : "off",
-		"no-console": "off",
-		"no-debugger": "off",
-		indent: "off",
-		allowIndentationTabs: true
-	},
-	parserOptions: {
-		parser: "@typescript-eslint/parser",
-		ecmaVersion: 6
-	}
-};
diff --git a/.gitignore b/.gitignore
index 025b65c7..6c8746dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,25 +1,13 @@
-.DS_Store
-node_modules
-/dist
-
-# local env files
-.env.local
-.env.*.local
-
-# Log files
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Editor directories and files
-.idea
-.vscode
-*.suo
-*.ntvs*
-*.njsproj
-*.sln
-*.sw?
-
-#Electron-builder output
-/dist_electron
-/build/icons
\ No newline at end of file
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+
+build/
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
index ee94bc5e..eb6f2ac9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "public/assets"]
 	path = public/assets
 	url = https://github.com/njbrown/texturelabdata.git
+[submodule "src/ads"]
+	path = src/ads
+	url = https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System.git
diff --git a/.prettierrc b/.prettierrc
deleted file mode 100644
index c9590876..00000000
--- a/.prettierrc
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-	"useTabs": true
-}
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 00000000..9746409c
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 3.5)
+
+project(qtcompleteapp VERSION 0.1 LANGUAGES CXX)
+
+# Advanced Docking System
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/src/ads)
+set_target_properties(qtadvanceddocking PROPERTIES BUILD_STATIC TRUE)
+
+# Node Graph
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/src/nodegraph)
+
+# 3D Viewer
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/src/viewer3d)
+
+# 3D Viewer
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/src/colorpicker)
+
+# Main App
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/src/texturelab)
+
diff --git a/README.md b/README.md
index 608398aa..c2dd7fb3 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,3 @@
-
-
 <h1 align="center">
   TextureLab
 </h1>
@@ -17,22 +15,27 @@
 ![Screenshot](https://user-images.githubusercontent.com/1708550/123368911-4ceb9f00-d542-11eb-87b5-b0fc3ea3cc3d.png)
 
 # NOTE!
+
 Texturelab will soon be converted to a qt project. All issues will be addressed after the conversion is complete.
 
 ## Building
 
-Building is done with `yarn`. Install it [here](https://classic.yarnpkg.com/en/docs/install) if you havent already.
+Prerequisites
 
 ```
-git clone https://github.com/njbrown/texturelab.git
+install qt
 
-cd texturelab
+//apt-get install libmesa-dev
+sudo apt install libgl1-mesa-dev
 
-# if you want to pull down assets (textures and node icons)
-git submodule update --init
+```
+
+Building is done with `yarn`. Install it [here](https://classic.yarnpkg.com/en/docs/install) if you havent already.
 
-yarn install
-yarn electron:serve
+```
+git clone https://github.com/njbrown/texturelab.git
+cd texturelab
+git submodule update --init --recursive
 ```
 
 ## Feedback
diff --git a/babel.config.js b/babel.config.js
deleted file mode 100644
index f57da986..00000000
--- a/babel.config.js
+++ /dev/null
@@ -1,3 +0,0 @@
-module.exports = {
-	presets: ["@vue/app"]
-};
diff --git a/jest.config.js b/jest.config.js
deleted file mode 100644
index a31425cf..00000000
--- a/jest.config.js
+++ /dev/null
@@ -1,27 +0,0 @@
-module.exports = {
-	moduleFileExtensions: ["js", "jsx", "json", "vue", "ts", "tsx"],
-	transform: {
-		"^.+\\.vue$": "vue-jest",
-		".+\\.(css|styl|less|sass|scss|svg|png|jpg|ttf|woff|woff2)$":
-			"jest-transform-stub",
-		"^.+\\.tsx?$": "ts-jest"
-	},
-	transformIgnorePatterns: ["/node_modules/"],
-	moduleNameMapper: {
-		"^@/(.*)$": "<rootDir>/src/$1"
-	},
-	snapshotSerializers: ["jest-serializer-vue"],
-	testMatch: [
-		"**/tests/unit/**/*.spec.(js|jsx|ts|tsx)|**/__tests__/*.(js|jsx|ts|tsx)"
-	],
-	testURL: "http://localhost/",
-	watchPlugins: [
-		"jest-watch-typeahead/filename",
-		"jest-watch-typeahead/testname"
-	],
-	globals: {
-		"ts-jest": {
-			babelConfig: true
-		}
-	}
-};
diff --git a/package.json b/package.json
deleted file mode 100644
index b954adc2..00000000
--- a/package.json
+++ /dev/null
@@ -1,80 +0,0 @@
-{
-	"name": "texturelab",
-	"version": "0.3.4",
-	"displayVersion": "0.3.4",
-	"private": false,
-	"scripts": {
-		"serve": "vue-cli-service serve",
-		"build": "vue-cli-service build",
-		"lint": "vue-cli-service lint",
-		"preelectron:build": "yarn buildicons",
-		"electron:build": "vue-cli-service electron:build",
-		"electron:serve": "vue-cli-service electron:serve",
-		"start": "vue-cli-service electron:serve",
-		"postinstall": "electron-builder install-app-deps",
-		"postuninstall": "electron-builder install-app-deps",
-		"test:unit": "vue-cli-service test:unit",
-		"buildicons": "electron-icon-builder --input=./public/icon.png --output ./build"
-	},
-	"main": "background.js",
-	"dependencies": {
-		"@electron/remote": "^1.2.0",
-		"@petamoriken/float16": "^3.4.7",
-		"@sentry/electron": "^3.0.0",
-		"@types/adm-zip": "^0.4.34",
-		"@types/node": "^16.9.2",
-		"@types/pngjs": "^6.0.1",
-		"@types/sharp": "^0.29.2",
-		"adm-zip": "^0.4.16",
-		"boxicons": "^2.0.5",
-		"core-js": "^2.6.5",
-		"custom-electron-titlebar": "^3.1.0",
-		"dedent-js": "^1.0.1",
-		"electron-settings": "^4.0.2",
-		"element-resize-detector": "^1.1.15",
-		"fast-png": "^5.0.4",
-		"jquery": "^3.5.0",
-		"pngjs": "^6.0.0",
-		"sharp": "^0.29.1",
-		"three": "^0.118.3",
-		"three-orbitcontrols-ts": "git+https://git@github.com/nicolaspanel/three-orbitcontrols-ts.git",
-		"typeface-open-sans": "^0.0.75",
-		"upng-js": "^2.1.0",
-		"vue": "^2.6.10",
-		"vue-class-component": "^7.0.2",
-		"vue-color": "^2.7.1",
-		"vue-final-modal": "^2.4.1",
-		"vue-golden-layout": "^1.6.0",
-		"vue-property-decorator": "^8.1.0",
-		"vue-router": "^3.0.3",
-		"vue-toast-notification": "^0.6.2",
-		"vuex": "^3.0.1"
-	},
-	"devDependencies": {
-		"@sentry/webpack-plugin": "^1.16.0",
-		"@types/jest": "^23.1.4",
-		"@types/jquery": "^3.3.30",
-		"@types/three": "^0.103.2",
-		"@typescript-eslint/eslint-plugin": "^2.33.0",
-		"@typescript-eslint/parser": "^2.33.0",
-		"@vue/cli-plugin-babel": "^3.8.0",
-		"@vue/cli-plugin-eslint": "^3.8.0",
-		"@vue/cli-plugin-typescript": "^3.8.0",
-		"@vue/cli-plugin-unit-jest": "^3.8.0",
-		"@vue/cli-service": "^3.8.0",
-		"@vue/eslint-config-prettier": "^4.0.1",
-		"@vue/eslint-config-typescript": "^4.0.0",
-		"@vue/test-utils": "1.0.0-beta.29",
-		"babel-core": "7.0.0-bridge.0",
-		"babel-eslint": "^10.0.1",
-		"electron": "^13.0.0",
-		"electron-devtools-installer": "^3.2.0",
-		"electron-icon-builder": "^2.0.1",
-		"eslint": "^5.16.0",
-		"eslint-plugin-vue": "^5.0.0",
-		"ts-jest": "^23.0.0",
-		"typescript": "^3.9.5",
-		"vue-cli-plugin-electron-builder": "^1.4.0",
-		"vue-template-compiler": "^2.6.10"
-	}
-}
diff --git a/postcss.config.js b/postcss.config.js
deleted file mode 100644
index 30803047..00000000
--- a/postcss.config.js
+++ /dev/null
@@ -1,5 +0,0 @@
-module.exports = {
-	plugins: {
-		autoprefixer: {}
-	}
-};
diff --git a/public/assets b/public/assets
index eed449f3..5996a27d 160000
--- a/public/assets
+++ b/public/assets
@@ -1 +1 @@
-Subproject commit eed449f3f9abe8f17ae354ab4cb9932272c7811b
+Subproject commit 5996a27d943382fabeafb18217f9de212c62d420
diff --git a/public/css/scrollbar.css b/public/css/scrollbar.css
deleted file mode 100644
index 9d3e8573..00000000
--- a/public/css/scrollbar.css
+++ /dev/null
@@ -1,33 +0,0 @@
-::-webkit-scrollbar {
-	width: 6px;
-	height: 6px;
-}
-::-webkit-scrollbar-button {
-	width: 0px;
-	height: 0px;
-}
-::-webkit-scrollbar-thumb {
-	background: #e1e1e1;
-	border: 0px none #ffffff;
-	border-radius: 50px;
-}
-::-webkit-scrollbar-thumb:hover {
-	background: #ffffff;
-}
-::-webkit-scrollbar-thumb:active {
-	background: #a7a7a7;
-}
-::-webkit-scrollbar-track {
-	background: #666666;
-	border: 0px none #ffffff;
-	border-radius: 50px;
-}
-::-webkit-scrollbar-track:hover {
-	background: #666666;
-}
-::-webkit-scrollbar-track:active {
-	background: #333333;
-}
-::-webkit-scrollbar-corner {
-	background: transparent;
-}
diff --git a/public/icon.png b/public/icon.png
deleted file mode 100644
index 68017cde..00000000
Binary files a/public/icon.png and /dev/null differ
diff --git a/public/index.html b/public/index.html
deleted file mode 100644
index 2df7731a..00000000
--- a/public/index.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-	<head>
-		<meta charset="utf-8" />
-		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
-		<meta name="viewport" content="width=device-width,initial-scale=1.0" />
-		<link rel="icon" href="<%= BASE_URL %>icon.png" />
-		<title>TextureLab v0.3.4</title>
-		<style>
-			body {
-				/* font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; */
-				font-family: "Open Sans";
-			}
-		</style>
-	</head>
-	<body>
-		<noscript>
-			<strong
-				>We're sorry but electron-vue-app doesn't work properly without
-				JavaScript enabled. Please enable it to continue.</strong
-			>
-		</noscript>
-		<div id="app"></div>
-		<!-- built files will be auto injected -->
-	</body>
-</html>
diff --git a/src/App.vue b/src/App.vue
deleted file mode 100644
index 610f8f88..00000000
--- a/src/App.vue
+++ /dev/null
@@ -1,1429 +0,0 @@
-<template>
-	<div>
-		<div class="topbar no-select">
-			<a class="button" href="#" @click="undoAction()">
-				<i class="bx bx-undo" style="font-size:1.4rem !important;"></i>Undo
-			</a>
-			<a class="button" href="#" @click="redoAction()">
-				<i class="bx bx-redo" style="font-size:1.4rem !important;"></i>Redo
-			</a>
-
-			<!-- <a class="right button" href="#" @click="exportUnity()">Unity Export</a>
-			<a class="right button" href="#" @click="exportZip()">Zip Export</a> -->
-			<span class="right">
-				<a class="export export-left" href="#" @click="exportTextures()"
-					>Export</a
-				>
-				<a class="export export-right" href="#" @click="showExportMenu()"
-					><i class="bx bx-cog" style="font-size:1.4rem !important;"></i
-				></a>
-			</span>
-		</div>
-		<div>
-			<!-- <vue-final-modal v-model="exportMenuVisible">
-				<div style="padding:10em; background:white;width:40vw;">
-					Hello this is the export modal
-				</div>
-			</vue-final-modal> -->
-			<!-- <vue-final-modal
-				v-model="exportMenuVisible"
-				classes="modal-container"
-				content-class="modal-content"
-			>
-				<button class="modal__close" @click="hideExportMenu()">
-					<i class="bx bx-x" style="font-size:1.4rem !important;"></i>
-				</button>
-				<span class="modal__title">Export Settings</span>
-				<div>
-					<span>Output Type</span>
-					<select>
-						<option value="zip">Zip</option>
-						<option value="folder">Folder</option>
-					</select>
-				</div>
-				<div class="modal__content">
-					<span>Destination:</span><br />
-					<div>
-						<span>{{ exportDestination }}</span
-						><button
-							v-if="exportDestination"
-							@click="chooseExportDestination()"
-						>
-							...
-						</button>
-						<button v-else @click="chooseExportDestination()">
-							Choose Folder
-						</button>
-					</div>
-					<div>
-						<span>Pattern:</span><br />
-						<div>
-							<input v-model="exportPattern" />
-							<button @click="resetExportPattern()">reset</button>
-						</div>
-						<div style="font-size:0.7em;">
-							${project} - Project Name <br />
-							${name} - Output Node Name <br />
-						</div>
-					</div>
-					<div>
-						<button
-							style="float:right;margin-top:1em;"
-							@click="exportTextures()"
-						>
-							Export
-						</button>
-					</div>
-				</div>
-			</vue-final-modal> -->
-			<exportdialog
-				:exportMenuVisible="exportMenuVisible"
-				@show="exportMenuVisible = true"
-				@hide="exportMenuVisible = false"
-				:exportPattern="exportPattern"
-				@exportPatternChanged="exportPatternChanged"
-				:project="project"
-				:editor="editor"
-				@exportTextures="exportTextures"
-			/>
-		</div>
-		<golden-layout
-			class="container"
-			@itemCreated="itemCreated"
-			:headerHeight="30"
-			:showPopoutIcon="false"
-			:showMaximiseIcon="false"
-			ref="GL"
-		>
-			<gl-row>
-				<gl-col width="30">
-					<gl-component
-						title="2D View"
-						class="test-component"
-						:closable="false"
-						height="40"
-					>
-						<!-- <canvas width="100" height="100" id="_2dview" /> -->
-						<preview2d ref="preview2d" />
-					</gl-component>
-
-					<gl-component
-						title="3D View"
-						class="test-component"
-						:closable="false"
-						height="60"
-					>
-						<!-- <canvas width="100" height="100" id="_3dview" /> -->
-						<preview3d ref="preview3d" />
-					</gl-component>
-				</gl-col>
-
-				<gl-col width="50" ref="canvas">
-					<gl-component title="Editor" class="test-component" :closable="false">
-						<library-menu
-							:editor="this.editor"
-							:library="this.library"
-							v-if="this.library != null"
-							ref="libraryMenu"
-						/>
-						<div class="editor-menu" style="height:2em;">
-							<!-- <a class="btn" href="#" @click="setShape('sphere')">S</a>
-      <a class="btn" href="#" @click="setShape('cube')">C</a>
-      <a class="btn" href="#" @click="setShape('plane')">P</a>
-							<a class="btn" href="#" @click="setShape('cylinder')">C</a>-->
-							<select class="enum" :value="resolution" @change="setResolution">
-								<option value="32">Resolution: 32x32</option>
-								<option value="64">Resolution: 64x64</option>
-								<option value="128">Resolution: 128x128</option>
-								<option value="256">Resolution: 256x256</option>
-								<option value="512">Resolution: 512x512</option>
-								<option value="1024">Resolution: 1024x1024</option>
-								<option value="2048">Resolution: 2048x2048</option>
-								<option value="4096">Resolution: 4096x4096</option>
-							</select>
-							<span class="no-select">RandomSeed:</span>
-							<input
-								type="number"
-								:value="randomSeed"
-								@input="updateRandomSeed"
-								@blur="setRandomSeed"
-								@focus="captureRandomSeed"
-							/>
-
-							<div style="float:right; display:flex;flex-direction:row;">
-								<select
-									class="enum"
-									:value="updateMode"
-									@change="setUpdateMode"
-								>
-									<option value="staggered">Update Mode: Staggered</option>
-									<option value="immediate">Update Mode: Immediate</option>
-								</select>
-								<!-- <div
-									style="width:10em;display:inline-block; height:100%;text-align:center;color:white;white-space:nowrap; border-radius:4px; background:skyblue;"
-								>
-									60% (12/20)
-								</div> -->
-								<progress-view
-									:value="this.processedNodes"
-									:total="this.totalNodes"
-								/>
-							</div>
-						</div>
-						<canvas
-							width="400"
-							height="400"
-							id="editor"
-							ondragover="event.preventDefault()"
-							:ondrop="handleFileDropInEditor"
-						/>
-					</gl-component>
-					<!-- <gl-component title="Library" height="30" :closable="false">
-            <library-view :editor="this.editor" :library="this.library" />
-					</gl-component>-->
-				</gl-col>
-
-				<gl-col width="20">
-					<gl-component title="Properties" :closable="false">
-						<node-properties-view
-							ref="properties"
-							v-if="this.propHolder != null"
-							:editor="this.editor"
-							:node="this.propHolder"
-						/>
-					</gl-component>
-					<gl-component
-						:title="`Library ${libraryVersionString}`"
-						:closable="false"
-					>
-						<library-view
-							:editor="this.editor"
-							:library="this.library"
-							v-if="this.library != null"
-						/>
-					</gl-component>
-					<!-- <gl-component title="Texture Properties" class="test-component" :closable="false"></gl-component> -->
-				</gl-col>
-			</gl-row>
-		</golden-layout>
-	</div>
-</template>
-
-<style>
-body {
-	overflow: hidden; /* The 'light' theme let a scroll-bar on the right of the main container */
-	padding: 0;
-	margin: 0;
-}
-
-.lm_tab {
-	font-family: "Open Sans", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif !important;
-	background: #333 !important;
-	/* border-radius: 2px 2px 0 0; */
-	height: 24px !important;
-	box-sizing: border-box;
-	line-height: 24px;
-	font-weight: bold;
-	-webkit-user-select: none;
-	-webkit-user-drag: none;
-	-webkit-app-region: no-drag;
-}
-
-.no-select {
-	-webkit-user-select: none;
-	-webkit-user-drag: none;
-	-webkit-app-region: no-drag;
-}
-
-.no-drag {
-	-webkit-user-drag: none;
-}
-</style>
-<style scoped>
-.topbar {
-	background: #333;
-	border-bottom: 2px black solid;
-	flex-grow: 0;
-	/* flex-basis: 100px; */
-	padding: 0.5em 0;
-	overflow: hidden;
-	padding-left: 0.5em;
-}
-
-.button {
-	border-radius: 2px;
-	background: #666;
-	padding: 0.5em 1em;
-	text-decoration: none;
-	color: white;
-	display: flex;
-	vertical-align: middle;
-	float: left;
-	margin-right: 0.5em;
-}
-
-.export-left {
-	border-radius: 2px 0 0px 2px;
-	background: #666;
-	padding: 0.5em 0.5em 0.5em 1em;
-	text-decoration: none;
-	color: white;
-	display: flex;
-	vertical-align: middle;
-	float: left;
-}
-
-.export-right {
-	border-radius: 0px 2px 2px 0;
-	background: #666;
-	padding: 0.5em 1em 0.5em 0.5em;
-	text-decoration: none;
-	color: white;
-	display: flex;
-	vertical-align: middle;
-	float: left;
-	margin-right: 0.5em;
-}
-
-.export:hover {
-	background: #999;
-}
-
-.button:hover {
-	background: #999;
-}
-
-.button:active {
-	background: #555;
-}
-
-.right {
-	float: right;
-}
-
-.hscreen {
-	/* width: 100vw; */
-	/* height: calc(100vh - 2em); */
-	/* height: 100%; */
-	padding: 0;
-	margin: 0;
-	/* flex-grow: 1; */
-}
-
-.container {
-	display: block;
-	width: 100vw;
-	height: calc(100vh - 30px - 38px - (2 * 0.5em) - 2px);
-	/* flex-direction: column; */
-}
-
-.glComponent {
-	background: #333;
-}
-.test-component {
-	overflow: hidden;
-	background: #333;
-}
-
-.editor-menu .enum {
-	margin-top: 0.1em;
-	border: solid white 1px;
-	border-radius: 2px;
-	color: white;
-	background: #222;
-	padding: 4px;
-	margin-right: 5px;
-}
-
-.editor-menu span {
-	color: white;
-}
-
-.editor-menu input[type="number"] {
-	/* //color: white; */
-	margin: 5px;
-	border: solid white 1px;
-	border-radius: 2px;
-	line-height: 1.5em;
-	width: 3em;
-	padding: 0 5px;
-}
-
-.enum {
-	outline: 0;
-	box-shadow: none;
-	border: 0 !important;
-
-	margin-top: 0.4em;
-	border: none;
-	border-radius: 4px;
-	color: white;
-	background: #222;
-	padding: 0.5em;
-	font-family: "Open Sans";
-}
-</style>
-
-<style scoped>
-.dark-mode div::v-deep .modal-content {
-	border-color: #2d3748;
-	background-color: #1a202c;
-}
-</style>
-
-<script lang="ts">
-// https://www.sitepoint.com/class-based-vue-js-typescript/
-import { Component, Prop, Vue, Watch, Model } from "vue-property-decorator";
-import EditorView from "@/views/Editor.vue";
-import LibraryView from "@/views/Library.vue";
-import LibraryMenu from "@/components/LibraryMenu.vue";
-import ProgressView from "@/components/ProgressView.vue";
-import { Editor } from "@/lib/editor";
-import { View3D } from "@/lib/view3d";
-import { createLibrary as createV2Library } from "@/lib/library/libraryv2";
-import NodePropertiesView from "./views/NodeProperties.vue";
-import Preview2D from "./views/Preview2D.vue";
-import Preview3D from "./views/Preview3D.vue";
-import { DesignerLibrary } from "./lib/designer/library";
-import { DesignerNode } from "./lib/designer/designernode";
-import { Designer, UpdateMode } from "./lib/designer";
-import { Project, ProjectManager } from "./lib/project";
-import { Titlebar, Color } from "custom-electron-titlebar";
-import { MenuCommands } from "./menu";
-import { unityExport } from "@/lib/export/unityexporter.js";
-import { unityZipExport } from "@/lib/export/unityzipexporter.js";
-import { zipExport } from "@/lib/export/zipexporter.js";
-import { shell } from "electron";
-//import libv1 from "./lib/library/libraryv1";
-import fs from "fs";
-import path from "path";
-import { IPropertyHolder } from "./lib/designer/properties";
-import { AddItemsAction } from "./lib/actions/additemsaction";
-import { UndoStack } from "./lib/undostack";
-import { unobserve } from "./unobserve";
-import { IApp } from "./iapp";
-import ExportDialog from "./views/dialogs/ExportDialog.vue";
-import { SetGlobalRandomSeedAction } from "./lib/actions/setglobalrandomseedaction";
-const electron = require("electron");
-const remote = require("@electron/remote");
-const { dialog, app, BrowserWindow, Menu } = remote;
-import pkg from "../package.json";
-import {
-	ColorSpace,
-	Exporter,
-	ExportSettings,
-	ImageFileType,
-	OutputType
-} from "./export";
-import settings from "electron-settings";
-import { Settings } from "./settings";
-// import VfmPlugin from "vue-final-modal";
-
-declare var __static: any;
-
-// Vue.use(VfmPlugin);
-
-@Component({
-	components: {
-		EditorView,
-		LibraryView,
-		NodePropertiesView,
-		LibraryMenu,
-		ProgressView,
-		preview2d: Preview2D,
-		preview3d: Preview3D,
-		exportdialog: ExportDialog
-	}
-})
-export default class App extends Vue implements IApp {
-	editor!: Editor;
-	library!: DesignerLibrary;
-	view3d!: View3D;
-
-	selectedNode: DesignerNode = null;
-	propHolder: IPropertyHolder = null;
-
-	@Prop()
-	titleBar: Titlebar;
-
-	//designer!: Designer;
-
-	project: Project;
-
-	updateMode: UpdateMode = UpdateMode.Staggered;
-	processedNodes: number = 0;
-	totalNodes: number = 0;
-
-	isMenuSetup: boolean = false;
-
-	resolution: number = 1024;
-	randomSeed: number = 32;
-	oldRandomSeed: number = 32; // for undo/redo purposes
-
-	mouseX: number = 0;
-	mouseY: number = 0;
-
-	version: string = pkg.version;
-
-	exportMenuVisible: boolean = false;
-	exportDestination: string = null;
-	exportPattern: string = "${project}_${name}";
-	// use channel name when no export name is present
-	// this is a fallback for existing textures made prior
-	// to the new export system
-	exportUseChannelName: boolean = false;
-
-	constructor() {
-		super();
-
-		this.editor = unobserve(new Editor());
-		this.library = createV2Library();
-
-		this.project = new Project();
-	}
-
-	created() {
-		electron.ipcRenderer.on(MenuCommands.FileNew, (evt, arg) => {
-			this.newProject();
-		});
-		electron.ipcRenderer.on(MenuCommands.FileOpen, (evt, arg) => {
-			this.openProject();
-		});
-		electron.ipcRenderer.on(MenuCommands.FileOpenRecent, (evt, path) => {
-			this.openProject(path);
-		});
-		electron.ipcRenderer.on(MenuCommands.FileSave, (evt, arg) => {
-			this.saveProject();
-		});
-		electron.ipcRenderer.on(MenuCommands.FileSaveAs, (evt, arg) => {
-			this.saveProject(true);
-		});
-
-		electron.ipcRenderer.on(MenuCommands.EditUndo, async (evt, arg) => {
-			this.undoAction();
-		});
-		electron.ipcRenderer.on(MenuCommands.EditRedo, async (evt, arg) => {
-			this.redoAction();
-		});
-
-		electron.ipcRenderer.on(MenuCommands.EditCopy, async (evt, arg) => {
-			document.execCommand("copy");
-		});
-		electron.ipcRenderer.on(MenuCommands.EditCut, async (evt, arg) => {
-			document.execCommand("cut");
-		});
-		electron.ipcRenderer.on(MenuCommands.EditPaste, async (evt, arg) => {
-			document.execCommand("paste");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.ExportZip, async (evt, arg) => {
-			await this.exportZip();
-		});
-		electron.ipcRenderer.on(MenuCommands.ExportUnity, async (evt, arg) => {
-			await this.exportUnity();
-		});
-		electron.ipcRenderer.on(MenuCommands.ExportUnityZip, async (evt, arg) => {
-			await this.exportUnityZip();
-		});
-
-		// samples
-		electron.ipcRenderer.on(
-			MenuCommands.ExamplesGoldLinesMarbleTiles,
-			async (evt, arg) => {
-				this.openExample("GoldLinedMarbleTiles.texture");
-			}
-		);
-
-		electron.ipcRenderer.on(MenuCommands.StylizedGrass, async (evt, arg) => {
-			this.openExample("Grass.texture");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.Copper, async (evt, arg) => {
-			this.openExample("Copper.texture");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.FoilGasket, async (evt, arg) => {
-			this.openExample("FoilGasket.texture");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.Sand, async (evt, arg) => {
-			this.openExample("Sand.texture");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.YellowTiles, async (evt, arg) => {
-			this.openExample("YellowTiles.texture");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.StoneGrass, async (evt, arg) => {
-			this.openExample("GrassyRock.texture");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.ExamplesGrenade, async (evt, arg) => {
-			this.openExample("Grenade.texture");
-		});
-
-		electron.ipcRenderer.on(MenuCommands.ExamplesScrews, async (evt, arg) => {
-			this.openExample("Screws.texture");
-		});
-
-		electron.ipcRenderer.on(
-			MenuCommands.ExamplesWoodenPlanks,
-			async (evt, arg) => {
-				this.openExample("WoodenPlanks.texture");
-			}
-		);
-
-		electron.ipcRenderer.on(MenuCommands.HelpTutorials, (evt, arg) => {
-			this.showTutorials();
-		});
-		electron.ipcRenderer.on(MenuCommands.HelpAbout, (evt, arg) => {
-			this.showAboutDialog();
-		});
-		electron.ipcRenderer.on(MenuCommands.HelpSubmitBug, (evt, arg) => {
-			this.submitBugs();
-		});
-		electron.ipcRenderer.on(MenuCommands.HelpDocumentation, (evt, arg) => {
-			this.showDocumentation();
-		});
-	}
-
-	mounted() {
-		this.setupMenu();
-
-		document.addEventListener("mousemove", evt => {
-			this.mouseX = evt.pageX;
-			this.mouseY = evt.pageY;
-		});
-
-		const canv = document.getElementById("editor") as HTMLCanvasElement;
-		canv.ondrop = evt => {
-			evt.preventDefault();
-
-			console.log("ondrop");
-			console.log(evt.dataTransfer.items);
-			console.log(evt.dataTransfer.files);
-
-			if (evt.dataTransfer.files.length > 0) {
-				this.handleFileDropInEditor(evt.dataTransfer.files);
-			} else {
-				var itemJson = evt.dataTransfer.getData("text/plain");
-				let item = JSON.parse(itemJson);
-				let rect = canv.getBoundingClientRect();
-				var pos = this.editor.graph.view.canvasToSceneXY(
-					evt.clientX - rect.left,
-					evt.clientY - rect.top
-				);
-
-				let action: AddItemsAction = null;
-
-				if (item.type == "node") {
-					let nodeName = item.name;
-
-					let dnode = this.library.create(nodeName);
-					// let n = this.editor.addNode(
-					// 	dnode,
-					// 	evt.clientX - rect.left,
-					// 	evt.clientY - rect.top
-					// );
-					let n = this.editor.addNode(dnode);
-					n.setCenter(pos.x, pos.y);
-
-					action = new AddItemsAction(
-						this.editor.graph,
-						this.editor.designer,
-						[],
-						[],
-						[],
-						[],
-						[n],
-						[dnode]
-					);
-				} else if (item.type == "comment") {
-					let d = this.editor.createComment();
-					d.setCenter(pos.x, pos.y);
-
-					action = new AddItemsAction(
-						this.editor.graph,
-						this.editor.designer,
-						[],
-						[d],
-						[],
-						[],
-						[],
-						[]
-					);
-				} else if (item.type == "frame") {
-					let d = this.editor.createFrame();
-					d.setCenter(pos.x, pos.y);
-
-					action = new AddItemsAction(
-						this.editor.graph,
-						this.editor.designer,
-						[d],
-						[],
-						[],
-						[],
-						[],
-						[]
-					);
-				} else if (item.type == "navigation") {
-					let d = this.editor.createNavigation();
-					d.setCenter(pos.x, pos.y);
-
-					action = new AddItemsAction(
-						this.editor.graph,
-						this.editor.designer,
-						[],
-						[],
-						[d],
-						[],
-						[],
-						[]
-					);
-				}
-
-				if (action != null) {
-					UndoStack.current.push(action);
-				}
-			}
-		};
-		this.editor.setSceneCanvas(canv);
-
-		//this.designer = this.editor.designer;
-		this.editor.onnodeselected = node => {
-			//this.selectedNode = node;
-			this.propHolder = unobserve(node);
-		};
-		this.editor.oncommentselected = comment => {
-			this.propHolder = unobserve(comment);
-		};
-		this.editor.onframeselected = frame => {
-			this.propHolder = unobserve(frame);
-		};
-		this.editor.onnodetextureupdated = (dnode, dtInMs) => {
-			this.processedNodes = this.editor.designer.processedNodes;
-			this.totalNodes = this.editor.designer.totalNodes;
-		};
-		// this.editor.onnavigationselected = nav => {
-		//   this.propHolder = nav;
-		// };
-		this.editor.onlibrarymenu = this.showLibraryMenu;
-
-		// const _2dview = <HTMLCanvasElement>document.getElementById("_2dview");
-		// this.editor.set2DPreview(_2dview);
-		(this.$refs.preview2d as any).setEditor(this.editor);
-
-		// const _3dview = <HTMLCanvasElement>document.getElementById("_3dview");
-		// this.view3d = new View3D();
-		// this.view3d.setCanvas(_3dview);
-		//this.editor.set3DScene(scene3D);
-		(this.$refs.preview3d as any).setEditor(this.editor);
-
-		UndoStack.current = this.editor.undoStack;
-
-		// listen for changes in undo stack
-		UndoStack.current.cleanStatusChanged = isClean => {
-			if (isClean) this.setWindowTitle(this.project.name);
-			else this.setWindowTitle("*" + this.project.name);
-		};
-
-		// handle quit event
-		window.onbeforeunload = (e: BeforeUnloadEvent) => {
-			console.log(e);
-			e.returnValue = false;
-
-			// this.$nextTick(() => {
-			// 	this.handleSaveBeforeQuit(e);
-			// });
-
-			setTimeout(() => {
-				this.handleSaveBeforeQuit(e);
-			}, 0);
-
-			// this.handleSaveBeforeQuit(e);
-			// alert("Should i save?");
-			// console.log(e);
-
-			// remote.getCurrentWindow().close();
-		};
-
-		//this.editor.createNewTexture();
-		this.newProject();
-
-		// start animation
-		const draw = () => {
-			if (this.editor) {
-				// might not be loaded as yet
-				this.editor.update();
-				this.editor.draw();
-			}
-			requestAnimationFrame(draw);
-		};
-		requestAnimationFrame(draw);
-
-		// properly resize GL
-		window.addEventListener("resize", () => {
-			//console.log(this.$refs.GL);
-		});
-	}
-
-	showExportMenu() {
-		this.exportMenuVisible = true;
-		this.$forceUpdate();
-	}
-
-	hideExportMenu() {
-		this.exportMenuVisible = false;
-	}
-
-	undoAction() {
-		if (document.activeElement instanceof HTMLElement)
-			(document.activeElement as HTMLElement).blur();
-		this.editor.undo();
-	}
-
-	redoAction() {
-		if (document.activeElement instanceof HTMLElement)
-			(document.activeElement as HTMLElement).blur();
-		this.editor.redo();
-	}
-
-	setupMenu() {
-		if (this.isMenuSetup) return;
-
-		// let titleBar = new Titlebar({
-		//   backgroundColor: Color.fromHex("#333333"),
-		//   icon: "./favicon.svg",
-		//   shadow: true
-		// });
-
-		this.isMenuSetup = true;
-	}
-
-	get libraryVersionString() {
-		return this.library == null ? "" : `(${this.library.versionName})`;
-	}
-
-	showLibraryMenu() {
-		// ensure mouse is in canvas bounds
-		//if (this.$refs.canvas.offset)
-		let lib = this.$refs.libraryMenu as any;
-
-		if (lib.show == false) lib.showModal(this.mouseX, this.mouseY);
-	}
-
-	setUpdateMode(evt: any) {
-		// console.log(evt);
-		this.updateMode = evt.target.value as UpdateMode;
-		this.editor.designer.setUpdateMode(this.updateMode);
-	}
-
-	itemCreated(item: any) {
-		// editor
-		if (item.config.title == "Editor") {
-			let container = item.container;
-			item.container.on("resize", function() {
-				const canvas = document.getElementById("editor") as HTMLCanvasElement;
-				canvas.width = container.width;
-				canvas.height = container.height - 32;
-			});
-		}
-
-		// 2d view
-		if (item.config.title == "2D View") {
-			let container = item.container;
-			item.container.on("resize", () => {
-				// const canvas = <HTMLCanvasElement>document.getElementById("_2dview");
-				// canvas.width = container.width;
-				// canvas.height = container.height;
-
-				(this.$refs.preview2d as any).resize(container.width, container.height);
-			});
-		}
-
-		// 3d view
-		if (item.config.title == "3D View") {
-			let container = item.container;
-			item.container.on("resize", () => {
-				// const canvas = <HTMLCanvasElement>document.getElementById("_3dview");
-				// canvas.width = container.width;
-				// canvas.height = container.height;
-				//if (this.view3d) this.view3d.resize(container.width, container.height);
-				(this.$refs.preview3d as any).resize(container.width, container.height);
-			});
-		}
-	}
-
-	resizeCanvas() {}
-
-	setWindowTitle(newTitle: string) {
-		document.title = newTitle;
-		this.titleBar.updateTitle();
-	}
-
-	handleSaveBeforeQuit(e: BeforeUnloadEvent) {
-		// close browser without check
-		const closeWindow = () => {
-			window.onbeforeunload = null;
-			window.close();
-			// this.$nextTick(() => {
-			// 	window.onbeforeunload = null;
-			// 	window.close();
-			// 	//remote.getCurrentWindow().close();
-			// });
-		};
-
-		if (!UndoStack.current.isClean()) {
-			const action = dialog.showMessageBoxSync({
-				title: "Save Changes?",
-				message: "You have unsaved changes. Do you want to save them?",
-				buttons: ["Yes", "No", "Cancel"]
-			});
-
-			// canceled
-			if (action == 2) {
-				e.returnValue = false;
-				return;
-			}
-
-			if (action == 1) {
-				closeWindow();
-			}
-
-			// yes, save scene
-			if (action == 0) {
-				e.returnValue = false;
-				this.saveProject(false, () => closeWindow());
-			}
-		} else {
-			closeWindow();
-		}
-	}
-
-	handleFileDropInEditor(files: FileList) {
-		// todo: handle image drop differently
-		// for now, only handle file drop
-		const file = files[0];
-		if (file.path.endsWith(".texture")) {
-			const openProject = () => {
-				// reset states of all components
-				// load default scene
-				(this.$refs.preview3d as any).reset();
-				(this.$refs.preview2d as any).reset();
-
-				let project = ProjectManager.load(file.path);
-
-				// ensure library exists
-				let libName = project.data["libraryVersion"];
-				let libraries = ["v0", "v1", "v2"];
-				if (libraries.indexOf(libName) == -1) {
-					alert(
-						`Project contains unknown library version '${libName}'. It must have been created with a new version of TextureLab`
-					);
-					return;
-				}
-
-				this.editor.load(project.data);
-				this.resolution = 1024;
-				this.randomSeed = 32;
-
-				this.project = unobserve(project);
-				this.library = unobserve(this.editor.library);
-
-				this.setWindowTitle(project.name);
-
-				UndoStack.current.clear();
-
-				this.addRecentFiles(file.path);
-			};
-
-			if (!UndoStack.current.isClean()) {
-				const action = dialog.showMessageBoxSync(null, {
-					title: "Save Changes?",
-					message: "You have unsaved changes. Do you want to save them?",
-					buttons: ["Yes", "No", "Cancel"]
-				});
-
-				// canceled
-				if (action == 2) {
-					return;
-				}
-
-				if (action == 1) {
-					openProject();
-				}
-
-				// yes, save scene
-				if (action == 0) {
-					this.saveProject(false, () => openProject());
-				}
-			} else {
-				openProject();
-			}
-		}
-	}
-
-	addRecentFiles(path: string) {
-		let recentFiles = settings.getSync(Settings.RecentFiles);
-		if (!Array.isArray(recentFiles)) {
-			recentFiles = [];
-		}
-
-		// remove existing item
-		const index = recentFiles.indexOf(path);
-		if (index !== -1) {
-			recentFiles.splice(index, 1);
-		}
-
-		// add new item to front of list
-		recentFiles.unshift(path);
-
-		settings.setSync(Settings.RecentFiles, recentFiles);
-	}
-
-	newProject() {
-		const newProject = () => {
-			// reset states of all components
-			// load default scene
-			(this.$refs.preview3d as any).reset();
-			(this.$refs.preview2d as any).reset();
-
-			this.editor.createNewTexture();
-			this.library = unobserve(this.editor.library);
-
-			this.project.name = "Untitled Project";
-			this.project.path = null;
-
-			this.resolution = 1024;
-			this.randomSeed = 32;
-
-			this.exportPattern = "${project}_${name}";
-			this.exportDestination = null;
-
-			this.setWindowTitle(this.project.name);
-			UndoStack.current.clear();
-		};
-
-		if (!UndoStack.current.isClean()) {
-			const action = dialog.showMessageBoxSync(null, {
-				title: "Save Changes?",
-				message: "You have unsaved changes. Do you want to save them?",
-				buttons: ["Yes", "No", "Cancel"]
-			});
-
-			// canceled
-			if (action == 2) {
-				return;
-			}
-
-			if (action == 1) {
-				newProject();
-			}
-
-			// yes, save scene
-			if (action == 0) {
-				this.saveProject(false, () => newProject());
-			}
-		} else {
-			newProject();
-		}
-	}
-
-	saveProject(saveAs: boolean = false, onSuccess: () => void = null) {
-		var data = this.editor.save();
-		// console.log(data);
-		this.project.data = data;
-		this.project.data["appVersion"] = this.version;
-
-		//export data
-		const exportData = {
-			filePattern: this.exportPattern
-		};
-		this.project.data["export"] = exportData;
-
-		// if project has no name then it hasnt been saved yet
-		if (this.project.path == null || saveAs) {
-			let path = dialog.showSaveDialogSync(remote.getCurrentWindow(), {
-				filters: [
-					{
-						name: "TextureLab Texture",
-						extensions: ["texture"]
-					}
-				],
-				defaultPath: "material.texture"
-			});
-
-			if (!path) return;
-
-			if (!path.endsWith(".texture")) path += ".texture";
-
-			const fileName = path.replace(/^.*[\\/]/, "");
-			this.project.name =
-				fileName.substr(0, fileName.lastIndexOf(".")) || fileName;
-			this.project.path = path;
-
-			ProjectManager.save(path, this.project);
-			this.setWindowTitle(this.project.name);
-			UndoStack.current.setClean();
-
-			this.addRecentFiles(path);
-
-			if (onSuccess) onSuccess();
-		} else {
-			ProjectManager.save(this.project.path, this.project);
-			UndoStack.current.setClean();
-		}
-	}
-
-	openProject(projectPath: string = null) {
-		const openProject = () => {
-			let path = projectPath;
-			if (!path) {
-				let paths = dialog.showOpenDialogSync(remote.getCurrentWindow(), {
-					filters: [
-						{
-							name: "TextureLab Texture",
-							extensions: ["texture"]
-						}
-					],
-					defaultPath: "material"
-				});
-
-				if (!paths) return;
-
-				path = paths[0];
-			}
-
-			let project = ProjectManager.load(path);
-			// console.log(project);
-
-			// ensure library exists
-			let libName = project.data["libraryVersion"];
-			let libraries = ["v0", "v1", "v2"];
-			if (libraries.indexOf(libName) == -1) {
-				alert(
-					`Project contains unknown library version '${libName}'. It must have been created with a new version of TextureLab`
-				);
-				return;
-			}
-
-			this.editor.load(project.data);
-			this.resolution = 1024;
-			this.randomSeed = 32;
-
-			this.exportPattern = "${project}_${name}";
-			this.exportDestination = null;
-			const exportData = project.data["export"];
-			if (exportData) {
-				this.exportPattern = exportData["filePattern"] || "${project}_${name}";
-			}
-
-			this.project = unobserve(project);
-			this.library = unobserve(this.editor.library);
-
-			this.setWindowTitle(project.name);
-
-			UndoStack.current.clear();
-
-			this.addRecentFiles(path);
-		};
-
-		if (!UndoStack.current.isClean()) {
-			const action = dialog.showMessageBoxSync(null, {
-				title: "Save Changes?",
-				message: "You have unsaved changes. Do you want to save them?",
-				buttons: ["Yes", "No", "Cancel"]
-			});
-
-			// canceled
-			if (action == 2) {
-				return;
-			}
-
-			if (action == 1) {
-				openProject();
-			}
-
-			// yes, save scene
-			if (action == 0) {
-				this.saveProject(false, () => openProject());
-			}
-		} else {
-			openProject();
-		}
-	}
-
-	loadSample(name: string) {}
-
-	async exportUnity() {
-		let buffer = await unityExport(
-			this.editor,
-			this.project.name.replace(".texture", "")
-		);
-		//console.log(buffer);
-		let path = dialog.showSaveDialogSync(remote.getCurrentWindow(), {
-			filters: [
-				{
-					name: "Unity Package",
-					extensions: ["unitypackage"]
-				}
-			],
-			defaultPath:
-				(this.project.name
-					? this.project.name.replace(".texture", "")
-					: "material") + ".unitypackage"
-		});
-
-		if (!path) return;
-
-		fs.writeFile(path, buffer, function(err) {
-			if (err) alert("Error exporting texture: " + err);
-		});
-
-		remote.shell.showItemInFolder(path);
-	}
-
-	async exportUnityZip() {
-		let path = dialog.showSaveDialogSync(remote.getCurrentWindow(), {
-			filters: [
-				{
-					name: "Zip File",
-					extensions: ["zip"]
-				}
-			],
-			defaultPath:
-				(this.project.name
-					? this.project.name.replace(".texture", "")
-					: "material") + ".zip"
-		});
-
-		if (!path) {
-			return;
-		}
-
-		let zip = await unityZipExport(
-			this.editor,
-			this.project.name.replace(".texture", "")
-		);
-
-		zip.writeZip(path);
-		remote.shell.showItemInFolder(path);
-	}
-
-	async exportZip() {
-		let path = dialog.showSaveDialogSync(remote.getCurrentWindow(), {
-			filters: [
-				{
-					name: "Zip File",
-					extensions: ["zip"]
-				}
-			],
-			defaultPath:
-				(this.project.name
-					? this.project.name.replace(".texture", "")
-					: "material") + ".zip"
-		});
-
-		if (!path) {
-			return;
-		}
-
-		let zip = await zipExport(
-			this.editor,
-			this.project.name.replace(".texture", "")
-		);
-
-		zip.writeZip(path);
-		remote.shell.showItemInFolder(path);
-	}
-
-	// returns true if destination was chosen
-	// returns false otherwise
-	chooseExportDestination(): boolean {
-		let path = dialog.showOpenDialogSync(remote.getCurrentWindow(), {
-			properties: ["openDirectory", "createDirectory"]
-		});
-
-		// console.log(path);
-		if (path && path.length > 0) {
-			this.exportDestination = path[0];
-			return true;
-		} else {
-			return false;
-		}
-	}
-
-	exportPatternChanged(value) {
-		console.log(value);
-		this.exportPattern = value;
-	}
-
-	resetExportPattern() {
-		this.exportPattern = "${project}_${name}";
-	}
-
-	async exportTextures() {
-		const settings = new ExportSettings();
-
-		// folder export
-		settings.outputType = OutputType.Folder;
-
-		if (!this.exportDestination) {
-			if (!this.chooseExportDestination()) return;
-		}
-
-		settings.name = this.project.name;
-		settings.outputPath = this.exportDestination;
-
-		settings.filePattern = this.exportPattern;
-
-		// zip export
-		// settings.outputPath = "C:/Users/Nicolas Brown/Desktop/test.zip";
-		// settings.outputType = OutputType.Zip;
-
-		// settings.textureSettings.set("albedo", {
-		// 	channelName: "albedo",
-		// 	colorSpace: ColorSpace.sRGB,
-		// 	fileType: ImageFileType.Png,
-		// 	transforms: []
-		// });
-
-		// settings.textureSettings.set("normal", {
-		// 	channelName: "normal",
-		// 	colorSpace: ColorSpace.sRGB,
-		// 	fileType: ImageFileType.Png,
-		// 	transforms: []
-		// });
-
-		const exporter = new Exporter();
-		await exporter.export(this.editor, settings);
-
-		this.$toast.open({
-			message: "Textures exported successfully!",
-			type: "default",
-			duration: 3000,
-			onClick: () => {
-				// open folder
-				shell.openPath(settings.outputPath);
-			}
-		});
-	}
-
-	showTutorials() {}
-
-	showAboutDialog() {
-		alert(
-			"TextureLab \n v" + pkg.displayVersion + "\n\n Developed by njbrown\n"
-		);
-	}
-
-	submitBugs() {}
-
-	showDocumentation() {
-		shell.openExternal("https://www.texturelab.io/docs");
-	}
-
-	openExample(fileName: string) {
-		let fullPath = path.join(__static, "assets/examples/", fileName);
-
-		this._openSample(fullPath);
-	}
-
-	_openSample(path: string) {
-		let project = ProjectManager.load(path);
-		// console.log(project);
-
-		// ensure library exists
-		let libName = project.data["libraryVersion"];
-		let libraries = ["v0", "v1", "v2"];
-		if (libraries.indexOf(libName) == -1) {
-			alert(
-				`Project contains unknown library version '${libName}'. It must have been created with a new version of TextureLab`
-			);
-			return;
-		}
-
-		const openProject = () => {
-			this.editor.load(project.data);
-			this.resolution = 1024;
-			this.randomSeed = 32;
-
-			const exportData = project.data["export"];
-			if (exportData) {
-				this.exportPattern = exportData["filePattern"] || "${project}_${name}";
-			}
-
-			project.path = null; // this ensures saving pops SaveAs dialog
-			this.project = unobserve(project);
-			this.library = unobserve(this.editor.library);
-			this.setWindowTitle(project.name);
-
-			this.exportPattern = "${project}_${name}";
-			this.exportDestination = null;
-
-			UndoStack.current.clear();
-		};
-
-		if (!UndoStack.current.isClean()) {
-			const action = dialog.showMessageBoxSync(null, {
-				title: "Save Changes?",
-				message: "You have unsaved changes. Do you want to save them?",
-				buttons: ["Yes", "No", "Cancel"]
-			});
-
-			// canceled
-			if (action == 2) {
-				return;
-			}
-
-			if (action == 1) {
-				openProject();
-			}
-
-			// yes, save scene
-			if (action == 0) {
-				this.saveProject(false, () => openProject());
-			}
-		} else {
-			openProject();
-		}
-	}
-
-	setResolution(evt) {
-		let value = parseInt(evt.target.value);
-		//console.log(value);
-		this.resolution = value;
-		this.editor.designer.setTextureSize(value, value);
-	}
-
-	// called when the input is focused
-	captureRandomSeed(evt) {
-		this.oldRandomSeed = this.randomSeed;
-	}
-
-	// called on input
-	updateRandomSeed(evt) {
-		let seed = evt.target.value;
-		this.randomSeed = seed;
-		this.editor.designer.setRandomSeed(seed);
-	}
-
-	// called when the input is blurred
-	setRandomSeed(evt) {
-		if (this.randomSeed == this.oldRandomSeed) return;
-
-		UndoStack.current.push(
-			new SetGlobalRandomSeedAction(
-				this,
-				this.editor,
-				this.oldRandomSeed,
-				this.randomSeed
-			)
-		);
-
-		// let seed = evt.target.value;
-		// this.randomSeed = seed;
-		this.editor.designer.setRandomSeed(this.randomSeed);
-	}
-}
-</script>
diff --git a/src/ads b/src/ads
new file mode 160000
index 00000000..efd88565
--- /dev/null
+++ b/src/ads
@@ -0,0 +1 @@
+Subproject commit efd88565a9db513054a1795dd6bf756fc95989c3
diff --git a/src/assets/logo.png b/src/assets/logo.png
deleted file mode 100644
index f3d2503f..00000000
Binary files a/src/assets/logo.png and /dev/null differ
diff --git a/src/background.ts b/src/background.ts
deleted file mode 100644
index 49777279..00000000
--- a/src/background.ts
+++ /dev/null
@@ -1,127 +0,0 @@
-"use strict";
-
-import { app, protocol, BrowserWindow, ipcMain } from "electron";
-import { createProtocol } from "vue-cli-plugin-electron-builder/lib";
-import installExtension, { VUEJS_DEVTOOLS } from "electron-devtools-installer";
-import { setupMenu } from "./menu";
-import * as Sentry from "@sentry/electron";
-
-// todo: fix later
-// https://docs.sentry.io/platforms/javascript/guides/electron/
-// if (process.env.VUE_APP_SENTRY_DNS) {
-// 	Sentry.init({ dsn: process.env.VUE_APP_SENTRY_DNS });
-// }
-
-// seems as tho this needs to be called else the app breaks
-require("@electron/remote/main").initialize();
-
-const isDevelopment = process.env.NODE_ENV !== "production";
-
-app.commandLine.appendSwitch("--disable-seccomp-filter-sandbox");
-
-// Keep a global reference of the window object, if you don't, the window will
-// be closed automatically when the JavaScript object is garbage collected.
-let win: BrowserWindow | null;
-
-// Scheme must be registered before the app is ready
-protocol.registerSchemesAsPrivileged([
-	{ scheme: "app", privileges: { secure: true, standard: true } }
-]);
-console.log("registered schemes");
-
-function createWindow() {
-	// Create the browser window.
-	win = new BrowserWindow({
-		width: 1280,
-		height: 720,
-		frame: false,
-		webPreferences: {
-			nodeIntegration: true,
-			webSecurity: false,
-			contextIsolation: false,
-			enableRemoteModule: true
-		}
-	});
-	win.maximize();
-
-	setupMenu();
-
-	if (process.env.WEBPACK_DEV_SERVER_URL) {
-		// Load the url of the dev server if in development mode
-		win.loadURL(process.env.WEBPACK_DEV_SERVER_URL as string);
-		//if (!process.env.IS_TEST) win.webContents.openDevTools();
-	} else {
-		createProtocol("app");
-		// Load the index.html when not in development
-		console.log("loading page");
-		win.loadURL("app://./index.html");
-	}
-
-	win.on("closed", () => {
-		win = null;
-	});
-}
-
-// Quit when all windows are closed.
-app.on("window-all-closed", () => {
-	// On macOS it is common for applications and their menu bar
-	// to stay active until the user quits explicitly with Cmd + Q
-	if (process.platform !== "darwin") {
-		app.quit();
-	}
-});
-
-app.on("activate", () => {
-	// On macOS it's common to re-create a window in the app when the
-	// dock icon is clicked and there are no other windows open.
-	if (win === null) {
-		createWindow();
-	}
-});
-
-// This method will be called when Electron has finished
-// initialization and is ready to create browser windows.
-// Some APIs can only be used after this event occurs.
-app.on("ready", async () => {
-	if (isDevelopment && !process.env.IS_TEST) {
-		// Install Vue Devtools
-		try {
-			await installExtension({
-				id: "ljjemllljcmogpfapbkkighbhhppjdbg", //Vue Devtools beta
-				electron: ">=1.2.1"
-			});
-		} catch (e) {
-			console.error("Vue Devtools failed to install:", e.toString());
-		}
-	}
-
-	// needed for image files to work
-	// https://github.com/electron/electron/issues/23393
-	protocol.registerFileProtocol("image", (request, callback) => {
-		const url = request.url.replace("image://", "");
-
-		try {
-			return callback(url);
-		} catch (error) {
-			console.error(error);
-			return callback("");
-		}
-	});
-
-	createWindow();
-});
-
-// Exit cleanly on request from parent process in development mode.
-if (isDevelopment) {
-	if (process.platform === "win32") {
-		process.on("message", data => {
-			if (data === "graceful-exit") {
-				app.quit();
-			}
-		});
-	} else {
-		process.on("SIGTERM", () => {
-			app.quit();
-		});
-	}
-}
diff --git a/src/colorpicker/CMakeLists.txt b/src/colorpicker/CMakeLists.txt
new file mode 100644
index 00000000..3dd90319
--- /dev/null
+++ b/src/colorpicker/CMakeLists.txt
@@ -0,0 +1,82 @@
+
+cmake_minimum_required(VERSION 3.5)
+
+
+find_package(QT NAMES Qt6 Qt5 COMPONENTS Core REQUIRED)
+find_package(Qt${QT_VERSION_MAJOR} 5.5 COMPONENTS Core Gui Widgets REQUIRED)
+if (UNIX AND NOT APPLE)
+    include_directories(${Qt${QT_VERSION_MAJOR}Gui_PRIVATE_INCLUDE_DIRS})
+endif()
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(SRCS
+    colorpicker.cpp
+    gradient.cpp
+    gradientpicker.cpp
+    widgets.cpp
+)
+set(HEADERS
+    colorpicker.h
+    gradient.h
+    gradientpicker.h
+    widgets.h
+)
+
+# library
+add_library(colorpicker STATIC ${SRCS} ${HEADERS})
+target_link_libraries(colorpicker PRIVATE Qt${QT_VERSION_MAJOR}::Core 
+                                        Qt${QT_VERSION_MAJOR}::Gui 
+                                        Qt${QT_VERSION_MAJOR}::Widgets)
+
+
+set_target_properties(colorpicker PROPERTIES
+    AUTOMOC ON
+    AUTORCC ON
+    CXX_EXTENSIONS OFF
+    EXPORT_NAME "Color Picker"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+)
+
+if(QT_VERSION_MAJOR STREQUAL "5")
+    set_target_properties(colorpicker PROPERTIES
+        CXX_STANDARD 14
+        CXX_STANDARD_REQUIRED ON)
+elseif(QT_VERSION_MAJOR STREQUAL "6")
+    set_target_properties(colorpicker PROPERTIES
+        CXX_STANDARD 17
+        CXX_STANDARD_REQUIRED ON)
+endif()
+
+# EXE for testing purposes
+add_executable(colorpicker_app
+            ${HEADERS}
+            ${SRCS}
+            main.cpp
+        )
+target_link_libraries(colorpicker_app PRIVATE Qt${QT_VERSION_MAJOR}::Core
+                                            Qt${QT_VERSION_MAJOR}::Gui
+                                            Qt${QT_VERSION_MAJOR}::Widgets)
+
+
+set_target_properties(colorpicker_app PROPERTIES
+    AUTOMOC ON
+    AUTORCC ON
+    CXX_EXTENSIONS OFF
+    EXPORT_NAME "Viewer Sample App"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+)
+
+if(QT_VERSION_MAJOR STREQUAL "5")
+    set_target_properties(colorpicker_app PROPERTIES
+        CXX_STANDARD 14
+        CXX_STANDARD_REQUIRED ON)
+elseif(QT_VERSION_MAJOR STREQUAL "6")
+    set_target_properties(colorpicker_app PROPERTIES
+        CXX_STANDARD 17
+        CXX_STANDARD_REQUIRED ON)
+endif()
\ No newline at end of file
diff --git a/src/colorpicker/colorpicker.cpp b/src/colorpicker/colorpicker.cpp
new file mode 100644
index 00000000..277866be
--- /dev/null
+++ b/src/colorpicker/colorpicker.cpp
@@ -0,0 +1,36 @@
+#include "colorpicker.h"
+#include "./widgets.h"
+#include <QEvent>
+#include <QGridLayout>
+#include <QHBoxLayout>
+#include <QMouseEvent>
+#include <QPainter>
+#include <QVBoxLayout>
+#include <QWidget>
+
+ColorPicker::ColorPicker()
+{
+    svBox = new SVBox();
+    hueSlider = new HueSlider();
+    // alphaSlider = new AlphaSlider();
+
+    svBox->setColor(QColor(255, 150, 0, 255));
+
+    // add layout
+    auto vlayout = new QVBoxLayout(this);
+    vlayout->addWidget(svBox);
+    vlayout->addWidget(hueSlider);
+    // vlayout->addWidget(alphaSlider);
+
+    this->setLayout(vlayout);
+
+    // this->setBaseSize(400, 500);
+    this->resize(400, 330);
+}
+
+void ColorPicker::setColor(const QColor& color)
+{
+    svBox->setColor(color);
+    hueSlider->setColor(color);
+    // alphaSlider->setColor(color);
+}
\ No newline at end of file
diff --git a/src/colorpicker/colorpicker.h b/src/colorpicker/colorpicker.h
new file mode 100644
index 00000000..14252b05
--- /dev/null
+++ b/src/colorpicker/colorpicker.h
@@ -0,0 +1,26 @@
+#pragma once
+#include <QDialog>
+
+class SVBox;
+class HueSlider;
+class AlphaSlider;
+
+class ColorPicker : public QDialog {
+public:
+    ColorPicker();
+
+    void setColor(const QColor& color);
+
+signals:
+    void onColorChanged(const QColor& color);
+    void onClosed();
+
+private:
+    void initUI();
+    void colorChangedByEditor(QColor color);
+    void colorChangedByUI(QColor color);
+
+    SVBox* svBox;
+    HueSlider* hueSlider;
+    AlphaSlider* alphaSlider;
+};
\ No newline at end of file
diff --git a/src/colorpicker/gradient.cpp b/src/colorpicker/gradient.cpp
new file mode 100644
index 00000000..ab45f1af
--- /dev/null
+++ b/src/colorpicker/gradient.cpp
@@ -0,0 +1,17 @@
+#include "gradient.h"
+
+void Gradient::sort()
+{
+    std::sort(points.begin(), points.end(),
+              [](const GradientPoint& a, const GradientPoint& b) {
+                  return a.position < b.position;
+              });
+}
+
+Gradient Gradient::defaultGradient()
+{
+    Gradient gradient;
+    gradient.addPoint(GradientPoint(0.0, QColor(0, 0, 0)));
+    gradient.addPoint(GradientPoint(1.0, QColor(255, 255, 255)));
+    return gradient;
+}
\ No newline at end of file
diff --git a/src/colorpicker/gradient.h b/src/colorpicker/gradient.h
new file mode 100644
index 00000000..45a0acf8
--- /dev/null
+++ b/src/colorpicker/gradient.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <QColor>
+#include <QVector>
+
+class GradientPoint {
+public:
+    float position;
+    QColor color;
+
+    GradientPoint(float position, const QColor& color)
+        : position(position), color(color)
+    {
+    }
+};
+
+class Gradient {
+public:
+    QVector<GradientPoint> points;
+
+    Gradient() {}
+    Gradient(const QVector<GradientPoint>& points) : points(points) {}
+    Gradient(const Gradient& other) : points(other.points) {}
+
+    void addPoint(GradientPoint point) { points.append(point); }
+    void sort();
+
+    static Gradient defaultGradient();
+};
\ No newline at end of file
diff --git a/src/colorpicker/gradientpicker.cpp b/src/colorpicker/gradientpicker.cpp
new file mode 100644
index 00000000..2e992588
--- /dev/null
+++ b/src/colorpicker/gradientpicker.cpp
@@ -0,0 +1,29 @@
+#include "gradientpicker.h"
+#include "gradient.h"
+
+GradientSlider::GradientSlider() { this->initUI(); }
+
+void GradientSlider::setGradient(const Gradient& gradient)
+{
+    this->gradient = gradient;
+    this->update();
+}
+
+void GradientSlider::initUI() { this->setFixedSize(400, 100); }
+
+GradientPickerDialog::GradientPickerDialog() { this->initUI(); }
+
+void GradientPickerDialog::setGradient(const Gradient& gradient)
+{
+    // this->gradient = gradient;
+    this->gradientSlider->setGradient(gradient);
+
+    // update ui
+    // this->update();
+}
+
+void GradientPickerDialog::initUI()
+{
+    // create ui
+    // this->setFixedSize(400, 100);
+}
\ No newline at end of file
diff --git a/src/colorpicker/gradientpicker.h b/src/colorpicker/gradientpicker.h
new file mode 100644
index 00000000..5e2fe2a6
--- /dev/null
+++ b/src/colorpicker/gradientpicker.h
@@ -0,0 +1,38 @@
+#pragma once
+#include "gradient.h"
+#include <QDialog>
+#include <QWidget>
+
+// class QWidget;
+
+class GradientSlider : QWidget {
+    Gradient gradient;
+
+public:
+    GradientSlider();
+    void setGradient(const Gradient& gradient);
+    // void setPointColor(int index, const QColor& color);
+    // sets color of selected point
+    void setPointColor(const QColor& color);
+
+private:
+    void initUI();
+
+signals:
+    void onGradientChanged(const Gradient& gradient);
+
+    // only the color is really used
+    void onActivePointChanged(int index, const QColor& color);
+};
+
+class GradientPickerDialog : QDialog {
+    // Gradient gradient;
+    GradientSlider* gradientSlider = nullptr;
+
+public:
+    GradientPickerDialog();
+    void setGradient(const Gradient& gradient);
+
+private:
+    void initUI();
+};
\ No newline at end of file
diff --git a/src/colorpicker/main.cpp b/src/colorpicker/main.cpp
new file mode 100644
index 00000000..b4d330a7
--- /dev/null
+++ b/src/colorpicker/main.cpp
@@ -0,0 +1,14 @@
+#include "colorpicker.h"
+#include <QApplication>
+
+int main(int argc, char* argv[])
+{
+    QApplication a(argc, argv);
+    ColorPicker dialog;
+
+    // dialog.resize(800, 600);
+    dialog.setColor(QColor(50, 125, 125));
+    dialog.show();
+
+    return a.exec();
+}
diff --git a/src/colorpicker/widgets.cpp b/src/colorpicker/widgets.cpp
new file mode 100644
index 00000000..6ba44f69
--- /dev/null
+++ b/src/colorpicker/widgets.cpp
@@ -0,0 +1,210 @@
+#include "widgets.h"
+#include <QEvent>
+#include <QGridLayout>
+#include <QHBoxLayout>
+#include <QMouseEvent>
+#include <QPainter>
+#include <QVBoxLayout>
+#include <QWidget>
+
+// https://github.com/yjg30737/pyqt-color-picker/blob/main/pyqt_color_picker/colorSquareWidget.py
+
+SVBox::SVBox()
+{
+    // this->setFixedSize(400, 300);
+    this->setMinimumHeight(300);
+
+    auto layout = new QGridLayout(this);
+    colorWidget = new QWidget();
+
+    blackWidget = new QWidget();
+    // https://github.com/yjg30737/pyqt-color-picker/blob/main/pyqt_color_picker/style/black_overlay.css
+    QString blackStyle = "background-color: qlineargradient(spread:pad, x1:0, "
+                         "y1:0, x2:0, y2:1, stop:0 rgba(0, 0, 0, 0),"
+                         "stop:1 rgba(0, 0, 0, 255));"
+                         "width:100%;"
+                         "border-radius: 5px;";
+    blackWidget->setStyleSheet(blackStyle);
+
+    blackWidget->installEventFilter(this);
+    blackWidget->setMouseTracking(true);
+
+    selector = new QWidget(blackWidget);
+    selector->setGeometry(qFloor(selectorDiameter / 2) * -1,
+                          qFloor(selectorDiameter / 2) * -1, selectorDiameter,
+                          selectorDiameter);
+
+    selector->setStyleSheet("background-color: none;"
+                            "border: 2px solid white;"
+                            "border-radius: 5px;");
+
+    // connect(blackWidget, &QWidget::mouseMoveEvent, []() {
+
+    // });
+
+    // you can stack widgets on top of each other in a grid
+
+    layout->addWidget(colorWidget, 0, 0, 1, 1);
+    layout->addWidget(blackWidget, 0, 0, 1, 1);
+    layout->setContentsMargins(0, 0, 0, 0);
+    this->setLayout(layout);
+
+    this->setColor(QColor(255, 0, 0));
+}
+
+void SVBox::setColor(const QColor& color)
+{
+    h = color.hueF();
+    s = color.saturationF();
+    v = color.valueF();
+
+    auto hue = color.hueF() * 100;
+    QString style = "background-color: qlineargradient(x1:1, x2:0, "
+                    "stop:0 hsl(%1%,100%,50%),"
+                    "stop:1 #fff);"
+                    "border-radius: 5px;";
+    auto formatted = style.arg(hue);
+
+    // qDebug() << formatted;
+    this->setStyleSheet(formatted);
+}
+
+bool SVBox::eventFilter(QObject* object, QEvent* event)
+{
+
+    if (object == this->blackWidget) {
+        auto mouseEvent = (QMouseEvent*)event;
+        // handle appropriate event
+        switch (event->type()) {
+        case QEvent::MouseButtonPress: {
+            if (mouseEvent->button() == Qt::LeftButton) {
+                dragging = true;
+                moveSelector(mouseEvent);
+            }
+        } break;
+        case QEvent::MouseButtonRelease: {
+            if (mouseEvent->button() == Qt::LeftButton) {
+                dragging = false;
+            }
+        } break;
+        case QEvent::MouseMove: {
+            if (dragging) {
+                //
+                moveSelector(mouseEvent);
+            }
+        } break;
+        }
+    }
+
+    // false means it should be send to target also. as in , we dont remove
+    // it. if you return true , you will take the event and widget never
+    // sees it so be carefull with that.
+    return false;
+}
+
+void SVBox::moveSelector(QMouseEvent* evt)
+{
+    auto pos = evt->pos();
+
+    pos.setX(std::clamp(pos.x(), 0, this->width()));
+    pos.setY(std::clamp(pos.y(), 0, this->height()));
+
+    this->selector->move(pos -
+                         QPoint(selectorDiameter / 2, selectorDiameter / 2));
+
+    // calculate hsl
+    s = (this->selector->pos().x() + (selectorDiameter / 2.0f)) / this->width();
+
+    v = std::abs(((this->selector->pos().y() + (selectorDiameter / 2.0f)) /
+                  this->height()) -
+                 1.0f);
+
+    // qDebug() << s << " " << v << "\n";
+}
+
+// https://github.com/mortalis13/Qt-Color-Picker-Qt/blob/master/Widgets/ColorWidgets/hselector.cpp
+
+HueSlider::HueSlider()
+{
+    selectorDrawn = false;
+    hue = 0;
+    // this->setFixedSize(400, 20);
+    setFixedHeight(20);
+
+    this->setStyleSheet("border-radius: 5px;");
+}
+void HueSlider::setHue(float hue)
+{
+    this->hue = hue;
+    update();
+}
+void HueSlider::setColor(const QColor& color)
+{
+    this->color = color;
+    this->hue = color.hueF();
+    update();
+}
+
+void HueSlider::paintEvent(QPaintEvent* event)
+{
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing);
+
+    float barHeight = height();
+    float barWidth = width();
+
+    if (!selectorDrawn) {
+        // if (true) {
+        selectorPixmap = QPixmap(barWidth, barHeight);
+        QPainter huePainter(&selectorPixmap);
+
+        QPointF p1(0, 0);
+        QPointF p2(width(), 0);
+        // QPointF p1(0, 0);
+        // QPointF p2(100, 100);
+        QLinearGradient grad(p1, p2);
+        // QLinearGradient grad(p1, p2);
+
+        float ratio = 1.0 / 360.0f;
+
+        QColor gradientColor;
+        for (qreal hs = 0; hs < 1.0; hs += ratio) {
+            gradientColor.setHsvF(hs, 1.0f, 1.0f);
+            grad.setColorAt(hs, gradientColor);
+        }
+
+        // grad.setColorAt(0.0, Qt::red);
+        // grad.setColorAt(0.5, Qt::green);
+        // grad.setColorAt(1.0, Qt::blue);
+
+        huePainter.setPen(Qt::NoPen);
+        huePainter.setBrush(QBrush(grad));
+        huePainter.drawRect(0, 0, barWidth, barHeight);
+
+        selectorDrawn = true;
+    }
+
+    // selectorPixmap.save("./selector.png");
+    painter.drawPixmap(0, 0, selectorPixmap);
+
+    // draw selector
+    painter.setPen(QPen(Qt::black, 2));
+    painter.setBrush(Qt::white);
+    painter.drawEllipse(QPointF(hue * width(), height() / 2), 5, 5);
+}
+
+void HueSlider::resizeEvent(QResizeEvent* event) { selectorDrawn = false; }
+
+void HueSlider::mousePressEvent(QMouseEvent* event)
+{
+    hue = event->pos().x() / (float)width();
+    update();
+    // emit onHueChanged(hue);
+}
+
+void HueSlider::mouseMoveEvent(QMouseEvent* event)
+{
+    hue = event->pos().x() / (float)width();
+    hue = std::clamp(hue, 0.0f, 1.0f);
+    update();
+}
diff --git a/src/colorpicker/widgets.h b/src/colorpicker/widgets.h
new file mode 100644
index 00000000..6043defb
--- /dev/null
+++ b/src/colorpicker/widgets.h
@@ -0,0 +1,52 @@
+#pragma once
+
+#include <QWidget>
+
+class SVBox;
+class HueSlider;
+class AlphaSlider;
+
+// https://github.com/yjg30737/pyqt-color-picker/blob/main/pyqt_color_picker/colorSquareWidget.py
+class SVBox : public QWidget {
+    QColor color;
+
+    QWidget* colorWidget;
+    // black overlay
+    QWidget* blackWidget;
+
+    QWidget* selector;
+    int selectorDiameter = 10;
+    bool dragging = false;
+
+    float h, s, v;
+
+public:
+    SVBox();
+    void setColor(const QColor& color);
+    bool eventFilter(QObject* object, QEvent* event);
+    void moveSelector(QMouseEvent* evt);
+
+signals:
+    void onSVChanged(float saturation, float value);
+};
+
+// https://github.com/mortalis13/Qt-Color-Picker-Qt/blob/master/Widgets/ColorWidgets/hselector.cpp
+class HueSlider : public QWidget {
+    float hue;
+    bool selectorDrawn;
+    QColor color;
+    QPixmap selectorPixmap;
+
+public:
+    HueSlider();
+    void setHue(float hue);
+    void setColor(const QColor& color);
+
+protected:
+    void paintEvent(QPaintEvent* event) override;
+    void resizeEvent(QResizeEvent* event) override;
+    void mousePressEvent(QMouseEvent* event) override;
+    void mouseMoveEvent(QMouseEvent* event) override;
+signals:
+    void onHueChanged(float hue);
+};
diff --git a/src/components/Accordion.vue b/src/components/Accordion.vue
deleted file mode 100644
index f0a7ac37..00000000
--- a/src/components/Accordion.vue
+++ /dev/null
@@ -1,76 +0,0 @@
-<template>
-	<div class="container">
-		<div
-			@click="
-				collapse();
-				$event.preventDefault();
-			"
-			class="header disable-select"
-		>
-			{{ isCollapsed ? "▼" : "▶" }} {{ header }}
-		</div>
-		<div v-show="isCollapsed" class="contents">
-			<slot></slot>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit, Model } from "vue-property-decorator";
-
-@Component
-export default class Accordion extends Vue {
-	@Prop({
-		default: "Header"
-	})
-	header: string;
-
-	@Prop({
-		default: false
-	})
-	collapsed: boolean;
-
-	showContents: boolean = false;
-
-	mounted() {
-		this.showContents = this.collapsed;
-	}
-
-	collapse() {
-		this.showContents = !this.showContents;
-		this.$emit("collapseStateChanged", this.showContents);
-	}
-
-	get isCollapsed() {
-		return !this.showContents;
-	}
-}
-</script>
-
-<style scoped>
-.container {
-	margin-bottom: 1px;
-}
-.header {
-	color: white;
-	font-weight: bold;
-	font-size: 14px;
-	background: #666;
-	padding: 0.5em;
-	padding-left: 0.5em;
-	cursor: pointer;
-}
-
-.contents {
-	margin-left: 0.5em;
-	margin-right: 0.5em;
-}
-
-.disable-select {
-	user-select: none; /* supported by Chrome and Opera */
-	-webkit-user-select: none; /* Safari */
-	-khtml-user-select: none; /* Konqueror HTML */
-	-moz-user-select: none; /* Firefox */
-	-ms-user-select: none; /* Internet Explorer/Edge */
-}
-</style>
diff --git a/src/components/ColorPicker.vue b/src/components/ColorPicker.vue
deleted file mode 100644
index 387cc650..00000000
--- a/src/components/ColorPicker.vue
+++ /dev/null
@@ -1,185 +0,0 @@
-<template>
-	<div class="input-group color-picker" ref="colorpicker">
-		<!-- <input
-			type="text"
-			class="form-control"
-			v-model="colorValue"
-			@focus="showPicker()"
-			ref="input"
-    />-->
-		<span class="input-group-addon color-picker-container">
-			<span
-				ref="span"
-				class="color-ui"
-				v-bind:style="styles"
-				@click="togglePicker()"
-			></span>
-			<sketch
-				:value="colors"
-				@input="updateFromPicker"
-				v-if="displayPicker"
-				ref="sketch"
-			/>
-		</span>
-	</div>
-</template>
-
-<style scoped>
-h1 {
-	height: 120px;
-	line-height: 120px;
-	text-align: center;
-}
-.vc-chrome {
-	position: absolute;
-	top: 35px;
-	right: 0;
-	z-index: 9;
-}
-.color-ui {
-	display: inline-block;
-	width: 95%;
-	height: 2.5em;
-	background-color: #000;
-	cursor: pointer;
-	border: solid white 3px;
-	border-radius: 4px;
-}
-.footer {
-	margin-top: 20px;
-	text-align: center;
-}
-</style>
-
-<script lang="ts">
-// https://codepen.io/Brownsugar/pen/NaGPKy
-import { Vue, Prop, Component, Emit, Watch } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { IPropertyHolder } from "@/lib/designer/properties";
-import { Sketch } from "vue-color";
-import { Color } from "../lib/designer/color";
-
-@Component({
-	components: {
-		Sketch
-	}
-})
-export default class ColorPicker extends Vue {
-	@Prop()
-	color: string;
-
-	oldValue: string;
-
-	colors: any = {};
-
-	colorValue: string = "#000";
-	displayPicker: boolean = false;
-
-	// @Emit()
-	// propertyChanged() {
-	// 	return this.prop.name;
-	// }
-
-	// updateValue(evt) {
-	// 	this.propHolder.setProperty(this.prop.name, evt.target.value);
-	// 	this.propertyChanged();
-	// }
-
-	mounted() {
-		this.setColor(this.color);
-		this.oldValue = this.color;
-	}
-
-	setColor(color) {
-		//this.updateColors(color);
-		this.colorValue = color;
-		this.colors = {
-			hex: color,
-			a: 1
-		};
-		// console.log("SET COLOR" + this.colorValue);
-	}
-
-	get styles() {
-		return {
-			backgroundColor: this.colorValue
-		};
-	}
-
-	// updateColors(color) {
-	// 	if (color.slice(0, 1) == "#") {
-	// 		this.colors = {
-	// 			hex: color,
-	// 		};
-	// 	} else if (color.slice(0, 4) == "rgba") {
-	// 		var rgba = color.replace(/^rgba?\(|\s+|\)$/g, "").split(","),
-	// 			hex =
-	// 				"#" +
-	// 				(
-	// 					(1 << 24) +
-	// 					(parseInt(rgba[0]) << 16) +
-	// 					(parseInt(rgba[1]) << 8) +
-	// 					parseInt(rgba[2])
-	// 				)
-	// 					.toString(16)
-	// 					.slice(1);
-	// 		this.colors = {
-	// 			hex: hex,
-	// 			a: rgba[3],
-	// 		};
-	// 	}
-	// }
-
-	showPicker() {
-		document.addEventListener("click", this.documentClick);
-		this.displayPicker = true;
-	}
-	hidePicker() {
-		document.removeEventListener("click", this.documentClick);
-		this.displayPicker = false;
-
-		if (this.colorValue != this.oldValue) {
-			this.oldValue = this.colorValue;
-			this.emitChange(this.colorValue);
-		}
-	}
-	togglePicker() {
-		this.displayPicker ? this.hidePicker() : this.showPicker();
-	}
-	updateFromPicker(color) {
-		//console.log(color);
-		this.colors = color;
-		this.colorValue = color.hex;
-	}
-	documentClick(e) {
-		let el = this.$refs.colorpicker,
-			target = e.target;
-		let sketch = (this.$refs.sketch as Vue).$el;
-
-		if (
-			target !== el &&
-			target !== this.$refs.span &&
-			target !== this.$refs.input &&
-			!sketch.contains(target)
-		) {
-			this.hidePicker();
-		}
-	}
-
-	@Emit("input")
-	emitInput(value: any) {
-		return value;
-	}
-
-	@Emit("change")
-	emitChange(value: any) {
-		return value;
-	}
-
-	@Watch("colorValue")
-	colorValueChanged(newValue) {
-		this.emitInput(newValue);
-	}
-}
-</script>
diff --git a/src/components/HelloWorld.vue b/src/components/HelloWorld.vue
deleted file mode 100644
index 8fd7679d..00000000
--- a/src/components/HelloWorld.vue
+++ /dev/null
@@ -1,130 +0,0 @@
-<template>
-	<div class="hello">
-		<h1>{{ msg }}</h1>
-		<p>
-			For a guide and recipes on how to configure / customize this project,
-			<br />check out the
-			<a href="https://cli.vuejs.org" target="_blank" rel="noopener"
-				>vue-cli documentation</a
-			>.
-		</p>
-		<h3>Installed CLI Plugins</h3>
-		<ul>
-			<li>
-				<a
-					href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-babel"
-					target="_blank"
-					rel="noopener"
-					>babel</a
-				>
-			</li>
-			<li>
-				<a
-					href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-typescript"
-					target="_blank"
-					rel="noopener"
-					>typescript</a
-				>
-			</li>
-			<li>
-				<a
-					href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-eslint"
-					target="_blank"
-					rel="noopener"
-					>eslint</a
-				>
-			</li>
-			<li>
-				<a
-					href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-unit-jest"
-					target="_blank"
-					rel="noopener"
-					>unit-jest</a
-				>
-			</li>
-		</ul>
-		<h3>Essential Links</h3>
-		<ul>
-			<li>
-				<a href="https://vuejs.org" target="_blank" rel="noopener">Core Docs</a>
-			</li>
-			<li>
-				<a href="https://forum.vuejs.org" target="_blank" rel="noopener"
-					>Forum</a
-				>
-			</li>
-			<li>
-				<a href="https://chat.vuejs.org" target="_blank" rel="noopener"
-					>Community Chat</a
-				>
-			</li>
-			<li>
-				<a href="https://twitter.com/vuejs" target="_blank" rel="noopener"
-					>Twitter</a
-				>
-			</li>
-			<li>
-				<a href="https://news.vuejs.org" target="_blank" rel="noopener">News</a>
-			</li>
-		</ul>
-		<h3>Ecosystem</h3>
-		<ul>
-			<li>
-				<a href="https://router.vuejs.org" target="_blank" rel="noopener"
-					>vue-router</a
-				>
-			</li>
-			<li>
-				<a href="https://vuex.vuejs.org" target="_blank" rel="noopener">vuex</a>
-			</li>
-			<li>
-				<a
-					href="https://github.com/vuejs/vue-devtools#vue-devtools"
-					target="_blank"
-					rel="noopener"
-					>vue-devtools</a
-				>
-			</li>
-			<li>
-				<a href="https://vue-loader.vuejs.org" target="_blank" rel="noopener"
-					>vue-loader</a
-				>
-			</li>
-			<li>
-				<a
-					href="https://github.com/vuejs/awesome-vue"
-					target="_blank"
-					rel="noopener"
-					>awesome-vue</a
-				>
-			</li>
-		</ul>
-	</div>
-</template>
-
-<script lang="ts">
-import { Component, Prop, Vue } from "vue-property-decorator";
-
-@Component
-export default class HelloWorld extends Vue {
-	@Prop() private msg!: string;
-}
-</script>
-
-<!-- Add "scoped" attribute to limit CSS to this component only -->
-<style scoped>
-h3 {
-	margin: 40px 0 0;
-}
-ul {
-	list-style-type: none;
-	padding: 0;
-}
-li {
-	display: inline-block;
-	margin: 0 10px;
-}
-a {
-	color: #42b983;
-}
-</style>
diff --git a/src/components/LibraryMenu.vue b/src/components/LibraryMenu.vue
deleted file mode 100644
index 29591ec5..00000000
--- a/src/components/LibraryMenu.vue
+++ /dev/null
@@ -1,399 +0,0 @@
-<template>
-	<div class="modal" :class="show ? 'show-modal' : ''" @click.self="hideModal">
-		<div class="menu" ref="menu" @keydown="menuKeyDown">
-			<input
-				class="search-input"
-				type="text"
-				placeholder="Filter.."
-				v-model="filter"
-				ref="search"
-				@keydown="preventUpDown"
-			/>
-			<div class="card-list">
-				<div
-					v-for="item in filteredList"
-					@click="itemClicked(item.type, item.name)"
-					:key="item.name"
-					class="libcard"
-					href="#"
-					draggable="true"
-					:class="item == selectedItem ? 'selected-card' : ''"
-				>
-					<img
-						v-if="imageExists(item.name)"
-						v-bind:src="calcImagePath(item.name)"
-						class="thumbnail"
-					/>
-					<div v-else class="thumbnail" />
-					<!-- <span class="thumbnail"></span> -->
-
-					<span class="node-name">{{ item.displayName }}</span>
-				</div>
-			</div>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Component, Prop, Vue, Watch } from "vue-property-decorator";
-import { DesignerLibrary } from "@/lib/designer/library";
-import { LibraryItem, LibraryItemType } from "@/views/Library.vue";
-import { Editor } from "@/lib/editor";
-import fs from "fs";
-import path from "path";
-import { AddItemsAction } from "@/lib/actions/additemsaction";
-import { UndoStack } from "@/lib/undostack";
-
-declare var __static: any;
-
-@Component
-export default class LibraryMenu extends Vue {
-	@Prop() private library!: DesignerLibrary;
-
-	@Prop()
-	editor!: Editor;
-
-	mouseX: number = 0;
-
-	mouseY: number = 0;
-
-	filter: string = "";
-
-	show: boolean = false;
-
-	selectedItem: LibraryItem = null;
-
-	mounted() {}
-
-	get items() {
-		let items = Object.values(this.library.nodes).map(n => {
-			let item = new LibraryItem(LibraryItemType.Node);
-			item.name = n.name;
-			item.displayName = n.displayName;
-
-			return item;
-		});
-
-		items.push(new LibraryItem(LibraryItemType.Comment, "comment", "Comment"));
-		items.push(new LibraryItem(LibraryItemType.Frame, "frame", "Frame"));
-		// items.push(
-		// 	new LibraryItem(
-		// 		LibraryItemType.Navigation,
-		// 		"navigation",
-		// 		"Navigation"
-		// 	)
-		// );
-
-		return items;
-	}
-
-	get filteredList() {
-		var kw = this.filter;
-		var list = Object.values(this.items).filter(function(item) {
-			return item.name.toLowerCase().includes(kw.toLowerCase());
-		});
-		return list;
-	}
-
-	hideModal() {
-		this.show = false;
-	}
-
-	showModal(x: number, y: number) {
-		this.filter = "";
-		this.show = true;
-		this.selectedItem = null;
-
-		let el = this.$refs.menu as HTMLElement;
-
-		el.style.left = x + "px";
-		el.style.top = y + "px";
-
-		this.mouseX = x;
-		this.mouseY = y;
-
-		//
-		window.setTimeout(x => {
-			(this.$refs["search"] as HTMLInputElement).focus();
-		}, 0);
-	}
-
-	closeModal() {
-		this.show = false;
-	}
-
-	preventUpDown(evt: KeyboardEvent) {
-		if (evt.keyCode == 38 || evt.keyCode == 40) {
-			evt.preventDefault();
-		}
-	}
-
-	addSelectedItem() {
-		if (this.selectedItem != null) {
-			this.addItem(this.selectedItem.type, this.selectedItem.name);
-		}
-	}
-
-	// SELECTOR EVENTS
-	menuKeyDown(evt: KeyboardEvent) {
-		// if enter key, add item
-		if (evt.key == "Enter") {
-			this.addSelectedItem();
-			this.hideModal();
-			return;
-		}
-
-		// if escape, quit
-		if (evt.key == "Escape") {
-			this.hideModal();
-			return;
-		}
-
-		let list = this.filteredList;
-
-		if (list.length == 0) {
-			this.selectedItem = null;
-			return;
-		}
-
-		if (list.length == 1) {
-			this.selectedItem = list[0];
-			return;
-		}
-
-		let index = this.filteredList.indexOf(this.selectedItem);
-		//if (index == -1) index = 0; // accept -1 too
-
-		// key up or keydown
-		if (evt.keyCode == 38) {
-			index -= 1;
-		} else if (evt.keyCode == 40) {
-			index += 1;
-		}
-
-		// clamp
-		index = Math.max(0, Math.min(index, list.length - 1));
-
-		this.selectedItem = list[index];
-	}
-
-	@Watch("filter")
-	updateSelector() {
-		// if selected item is not in filtered list
-		// select top item
-
-		let list = this.filteredList;
-
-		if (list.length == 0) {
-			this.selectedItem = null;
-			return;
-		}
-
-		if (list.length == 1) {
-			this.selectedItem = list[0];
-			return;
-		}
-
-		let index = this.filteredList.indexOf(this.selectedItem);
-
-		// clamp
-		index = Math.max(0, Math.min(index, list.length - 1));
-
-		this.selectedItem = list[index];
-	}
-
-	itemClicked(type: LibraryItemType, nodeName: string) {
-		this.addItem(type, nodeName);
-		this.hideModal();
-	}
-
-	addItem(type: LibraryItemType, nodeName: string) {
-		let action: AddItemsAction = null;
-
-		// bring mouse pos to local space first
-		let canvasPos = this.editor.graph.view.globalToCanvasXY(
-			this.mouseX,
-			this.mouseY
-		);
-
-		let scenePos = this.editor.graph.view.canvasToSceneXY(
-			canvasPos.x,
-			canvasPos.y
-		);
-
-		if (type == LibraryItemType.Node) {
-			var dnode = this.library.create(nodeName);
-			var canvas = this.editor.canvas;
-			var n = this.editor.addNode(dnode, canvas.width / 2, canvas.height / 2);
-
-			n.setCenter(scenePos.x, scenePos.y);
-
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[],
-				[],
-				[],
-				[],
-				[n],
-				[dnode]
-			);
-		}
-		if (type == LibraryItemType.Comment) {
-			let item = this.editor.createComment();
-			item.setCenter(scenePos.x, scenePos.y);
-
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[],
-				[item],
-				[],
-				[],
-				[],
-				[]
-			);
-		}
-		if (type == LibraryItemType.Frame) {
-			let item = this.editor.createFrame();
-			item.setCenter(scenePos.x, scenePos.y);
-
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[item],
-				[],
-				[],
-				[],
-				[],
-				[]
-			);
-		}
-		if (type == LibraryItemType.Navigation) {
-			let item = this.editor.createNavigation();
-			item.setCenter(scenePos.x, scenePos.y);
-
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[],
-				[],
-				[item],
-				[],
-				[],
-				[]
-			);
-		}
-
-		if (action != null) {
-			UndoStack.current.push(action);
-		}
-
-		return false;
-	}
-
-	imageExists(node: string) {
-		//return fs.existsSync(`./public/assets/nodes/${node}.png`);
-		return fs.existsSync(path.join(__static, `assets/nodes/${node}.png`));
-	}
-
-	calcImagePath(node: string) {
-		//return `./assets/nodes/${node}.png`;
-		if (process.env.NODE_ENV == "production")
-			return (
-				"file://" + path.join(process.env.BASE_URL, `assets/nodes/${node}.png`)
-			);
-		return path.join(process.env.BASE_URL, `assets/nodes/${node}.png`);
-	}
-}
-</script>
-
-<style scoped>
-/* The Modal (background) */
-.modal {
-	display: none; /* Hidden by default */
-	position: fixed; /* Stay in place */
-	z-index: 1000; /* Sit on top */
-	left: 0;
-	top: 0;
-	width: 100%; /* Full width */
-	height: 100%; /* Full height */
-	overflow: hidden; /* Enable scroll if needed */
-	background-color: rgba(0, 0, 0, 0.2); /* Black w/ opacity */
-}
-
-.show-modal {
-	display: block;
-}
-
-/* Modal Content/Box */
-.menu {
-	position: fixed;
-	background-color: #fefefe;
-	/* margin: 15% auto; */
-	/* padding: 20px; */
-	/* border: 1px solid #888; */
-	width: 350px; /* Could be more or less, depending on screen size */
-	background: rgb(44, 44, 44);
-	box-shadow: rgba(0, 0, 0, 0.9) 0px 1px 3px;
-	border-radius: 2px;
-}
-
-.card-list {
-	height: 700px;
-	overflow-y: auto;
-}
-
-.search-input {
-	background: transparent;
-	color: white;
-	/* border: solid rgb(77, 156, 187) 1px; */
-	border: none;
-
-	float: none;
-	display: block;
-	text-align: left;
-	width: calc(100% - 20px);
-	margin: 10px;
-	padding: 10px;
-	background: rgb(88, 88, 88);
-
-	box-sizing: border-box;
-	font-size: 1.2rem;
-}
-
-.search-input:focus {
-	outline: none;
-}
-
-.thumbnail {
-	width: 20px;
-}
-
-.libcard {
-	padding: 0.5em;
-	color: white;
-	border: solid transparent 1px;
-	display: table; /* for center-aligning text */
-	cursor: pointer;
-}
-
-.libcard:hover {
-	background: rgb(30, 30, 36);
-}
-
-.selected-card {
-	background: gray;
-}
-
-.libcard span {
-	padding-left: 10px;
-	width: 100%;
-	display: table-cell; /* for center-aligning text */
-	vertical-align: middle;
-}
-
-.libcard img {
-	width: 40px;
-}
-</style>
diff --git a/src/components/ProgressView.vue b/src/components/ProgressView.vue
deleted file mode 100644
index c2e9decd..00000000
--- a/src/components/ProgressView.vue
+++ /dev/null
@@ -1,94 +0,0 @@
-<template>
-	<canvas
-		style="width:10em;border-radius:4px;height:1.7em;margin:2px;"
-		ref="canvas"
-		width="160"
-		height="27"
-	></canvas>
-</template>
-
-<script lang="ts">
-import { Component, Prop, Vue, Watch } from "vue-property-decorator";
-
-declare var __static: any;
-
-@Component
-export default class LibraryMenu extends Vue {
-	@Prop()
-	total: number;
-
-	@Prop()
-	value: number;
-
-	context: CanvasRenderingContext2D;
-	canvas: HTMLCanvasElement;
-
-	mounted() {
-		console.log(this.$refs);
-		const canvas = this.$refs.canvas as HTMLCanvasElement;
-		this.context = canvas.getContext("2d");
-		this.canvas = canvas;
-
-		// console.log(rect);
-
-		requestAnimationFrame(() => {
-			this.renderBar();
-		});
-	}
-
-	beforeUpdate() {
-		requestAnimationFrame(() => {
-			this.renderBar();
-		});
-	}
-
-	@Watch("value")
-	valueUpdated() {
-		this.canvas.width = this.canvas.clientWidth;
-		this.canvas.height = this.canvas.clientHeight;
-		const style = getComputedStyle(this.canvas);
-
-		console.log(this.canvas.clientWidth);
-		console.log(this.canvas.offsetWidth);
-		console.log(parseInt(style.width));
-		console.log(this.canvas.clientHeight);
-
-		this.renderBar();
-	}
-
-	renderBar() {
-		const width = this.canvas.width;
-		const height = this.canvas.height;
-		const ctx = this.context;
-
-		ctx.setTransform(1, 0, 0, 1, 0, 0);
-		ctx.clearRect(0, 0, width, height);
-
-		ctx.fillStyle = "black";
-		ctx.fillRect(0, 0, width, height);
-		console.log("rendering bar");
-
-		console.log("total: " + this.total);
-		console.log("value: " + this.value);
-
-		if (this.total != 0) {
-			const percent = Math.round((this.value / this.total) * 100);
-			console.log("percent: " + percent);
-
-			ctx.fillStyle = "#1b7dd9";
-			ctx.fillRect(0, 0, width * (this.value / this.total), height);
-
-			// draw centered text
-			ctx.font = "bold 14px 'Open Sans'";
-			ctx.fillStyle = "white";
-			const text = `${percent}% (${this.value}/${this.total})`;
-			const size = ctx.measureText(text);
-			const textX = width / 2 - size.width / 2;
-			const textY = height / 2 + 7.0 / 2;
-			ctx.fillText(text, textX, textY);
-		}
-	}
-}
-</script>
-
-<style></style>
diff --git a/src/components/properties/BoolProp.vue b/src/components/properties/BoolProp.vue
deleted file mode 100644
index b6706607..00000000
--- a/src/components/properties/BoolProp.vue
+++ /dev/null
@@ -1,108 +0,0 @@
-<template>
-	<div class="field">
-		<label>{{ prop.displayName }}</label>
-		<div>
-			<button class="bool" @click="toggleValue()">
-				{{ val ? "True" : "False" }}
-			</button>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit, Model } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { IPropertyHolder } from "../../lib/designer/properties";
-import { PropertyChangeComplete } from "./ipropertyui";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-import { UndoStack } from "@/lib/undostack";
-
-@Component
-export default class BoolPropertyView extends Vue {
-	@Prop()
-	// BoolProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	propHolder: IPropertyHolder;
-
-	val: boolean = false;
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	@Emit()
-	propertyChangeCompleted(evt: PropertyChangeComplete) {
-		return evt;
-	}
-
-	//value: boolean = true;
-	get valueText() {
-		return this.val ? "True" : "False";
-	}
-	mounted() {
-		this.val = this.prop.value;
-	}
-
-	toggleValue() {
-		let evt = { propName: this.prop.name, oldValue: null, newValue: null };
-		let oldValue = this.prop.value;
-		evt.newValue = !this.prop.value;
-
-		//this.value = !this.value;
-		this.propHolder.setProperty(this.prop.name, !this.prop.value);
-		this.val = this.prop.value;
-
-		this.propertyChanged();
-		//this.propertyChangeCompleted(evt);
-
-		let action = new PropertyChangeAction(
-			() => {
-				this.undoUpdate();
-			},
-			this.prop.name,
-			this.propHolder,
-			oldValue,
-			this.prop.value
-		);
-		UndoStack.current.push(action);
-	}
-
-	undoUpdate() {
-		this.val = this.prop.value;
-		this.propertyChanged();
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.bool {
-	margin-top: 0.4em;
-	width: 100%;
-	border: none;
-	border-radius: 2px;
-	color: white;
-	background: #222;
-	padding: 4px;
-	outline: none;
-}
-</style>
diff --git a/src/components/properties/ColorProp.vue b/src/components/properties/ColorProp.vue
deleted file mode 100644
index 861052e3..00000000
--- a/src/components/properties/ColorProp.vue
+++ /dev/null
@@ -1,122 +0,0 @@
-,
-<template>
-	<div class="field">
-		<label>{{ prop.displayName }}</label>
-		<div>
-			<color-picker
-				:key="key"
-				:color="val"
-				@input="onInput"
-				@change="onValue"
-			/>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-// https://codepen.io/Brownsugar/pen/NaGPKy
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { IPropertyHolder } from "@/lib/designer/properties";
-import ColorPicker from "@/components/ColorPicker.vue";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-import { UndoStack } from "@/lib/undostack";
-
-@Component({
-	components: {
-		ColorPicker
-	}
-})
-export default class ColorPropertyView extends Vue {
-	@Prop()
-	prop: any;
-
-	oldValue: string;
-	val: string = "#000000";
-	key: number = 0;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	propHolder: IPropertyHolder;
-
-	public ColorPropertyView() {}
-
-	mounted() {
-		this.oldValue = this.prop.value.toHex();
-		this.val = this.prop.value.toHex();
-		this.key += 1;
-	}
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	onInput(value) {
-		this.propHolder.setProperty(this.prop.name, value);
-		this.val = value;
-	}
-
-	onValue(value) {
-		//let oldValue = this.prop.value.toHex();
-		this.propHolder.setProperty(this.prop.name, value);
-		this.val = this.prop.value.toHex();
-
-		let action = new PropertyChangeAction(
-			() => {
-				this.undoUpdate();
-			},
-			this.prop.name,
-			this.propHolder,
-			this.oldValue,
-			this.prop.value.toHex()
-		);
-		UndoStack.current.push(action);
-
-		this.oldValue = this.prop.value.toHex();
-
-		this.propertyChanged();
-	}
-
-	// update called after undo action
-	undoUpdate() {
-		this.oldValue = this.val;
-		this.val = this.prop.value.toHex();
-		this.key += 1;
-		this.propertyChanged();
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.color {
-	margin-top: 0.4em;
-	width: 100%;
-	width: calc(100% - 4px - 1px);
-	appearance: none;
-}
-
-.color::-webkit-color-swatch-wrapper {
-	padding: 0;
-}
-
-.color::-webkit-color-swatch {
-	border: none;
-}
-</style>
diff --git a/src/components/properties/EnumProp.vue b/src/components/properties/EnumProp.vue
deleted file mode 100644
index 1797abe1..00000000
--- a/src/components/properties/EnumProp.vue
+++ /dev/null
@@ -1,101 +0,0 @@
-<template>
-	<div class="field">
-		<label>{{ prop.displayName }}</label>
-		<div>
-			<select class="enum" @change="updateValue">
-				<option
-					v-for="(opt, index) in prop.values"
-					:value="index"
-					:key="index"
-					:selected="index == enumIndex"
-					>{{ opt }}</option
-				>
-			</select>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { IPropertyHolder } from "@/lib/designer/properties";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-import { UndoStack } from "@/lib/undostack";
-
-@Component
-export default class EnumPropertyView extends Vue {
-	@Prop()
-	// EnumProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	propHolder: IPropertyHolder;
-
-	enumIndex: number = 0;
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	mounted() {
-		this.enumIndex = this.prop.index;
-	}
-
-	updateValue(evt) {
-		let oldVal = this.prop.getValue();
-		this.propHolder.setProperty(this.prop.name, parseInt(evt.target.value));
-		this.propertyChanged();
-
-		let action = new PropertyChangeAction(
-			() => this.undoUpdate(),
-			this.prop.name,
-			this.propHolder,
-			oldVal,
-			evt.target.value
-		);
-		UndoStack.current.push(action);
-		this.enumIndex = this.prop.index;
-	}
-
-	// update called after undo action
-	undoUpdate() {
-		this.enumIndex = this.prop.index;
-		this.propertyChanged();
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.enum {
-	outline: 0;
-	box-shadow: none;
-	border: 0 !important;
-
-	margin-top: 0.4em;
-	width: 100%;
-	border: none;
-	border-radius: 4px;
-	color: white;
-	background: #222;
-	padding: 0.5em;
-	font-family: "Open Sans";
-}
-</style>
diff --git a/src/components/properties/FloatProp.vue b/src/components/properties/FloatProp.vue
deleted file mode 100644
index 6a8ca8c1..00000000
--- a/src/components/properties/FloatProp.vue
+++ /dev/null
@@ -1,226 +0,0 @@
-<template>
-	<div class="field">
-		<div>
-			<label>{{ prop.displayName }}</label>
-		</div>
-		<div class="input-holder">
-			<div style="width:100%; margin-right:10px;padding:0.4em;">
-				<input
-					type="range"
-					:min="prop.minValue"
-					:max="prop.maxValue"
-					:value="this.val"
-					:step="prop.step"
-					@input="updateValue"
-					class="slider"
-					@mousedown="focus"
-					@mouseup="blur"
-				/>
-			</div>
-			<div style="width:70px;">
-				<input
-					type="number"
-					:value="this.val"
-					:step="prop.step"
-					@input="updateValue"
-					class="number"
-					@focus="focus"
-					@blur="blur"
-				/>
-			</div>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { IPropertyHolder } from "../../lib/designer/properties";
-import { PropertyChangeComplete } from "./ipropertyui";
-import { UndoStack } from "@/lib/undostack";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-
-@Component
-export default class FloatPropertyView extends Vue {
-	@Prop()
-	// FloatProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	propHolder: IPropertyHolder;
-
-	oldValue: number;
-	val: number = 0;
-
-	mounted() {
-		this.val = this.prop.value;
-	}
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	@Emit()
-	propertyChangeCompleted(evt: PropertyChangeComplete) {
-		return evt;
-	}
-
-	updateValue(evt) {
-		this.propHolder.setProperty(this.prop.name, evt.target.value);
-		this.val = evt.target.value;
-		this.propertyChanged();
-	}
-
-	// update called after undo action
-	undoUpdate() {
-		this.oldValue = this.val;
-		this.val = this.prop.value;
-		this.propertyChanged();
-	}
-
-	focus() {
-		this.oldValue = this.prop.value;
-	}
-
-	blur() {
-		// let evt = {
-		// 	propName: this.prop.name,
-		// 	oldValue: this.oldValue,
-		// 	newValue: this.prop.value,
-		// };
-		// this.propertyChangeCompleted(evt);
-		let action = new PropertyChangeAction(
-			() => {
-				this.undoUpdate();
-			},
-			this.prop.name,
-			this.propHolder,
-			this.oldValue,
-			this.prop.value
-		);
-
-		UndoStack.current.push(action);
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.number {
-	width: calc(100% - 1em - 1px);
-	border: solid transparent 1px;
-	border-radius: 4px;
-	position: relative;
-	outline: none;
-
-	background: #4e4e4e;
-	color: rgba(255, 255, 255, 0.8);
-	padding: 0.5em;
-}
-
-.number:focus {
-	border-color: dodgerblue;
-}
-
-.number::-webkit-inner-spin-button {
-	width: 1em;
-	border-left: 1px solid #bbb;
-	opacity: 1;
-	color: rgb(130, 130, 130);
-	position: absolute;
-	top: 0;
-	right: 0;
-	bottom: 0;
-	cursor: pointer;
-}
-
-.input-holder {
-	display: flex;
-}
-
-/* https://www.w3schools.com/howto/howto_js_rangeslider.asp */
-/* http://jsfiddle.net/brenna/f4uq9edL/?utm_source=website&utm_medium=embed&utm_campaign=f4uq9edL */
-.slider {
-	-webkit-appearance: none;
-	width: 100%;
-	height: 3px;
-	border-radius: 5px;
-	background-color: rgb(255, 255, 255, 0.7);
-	color: rgba(0, 0, 0);
-	outline: none;
-	-webkit-transition: 0.2s;
-	transition: opacity 0.2s;
-}
-
-.slider::-webkit-slider-thumb {
-	-webkit-appearance: none;
-	appearance: none;
-	width: 17px;
-	height: 17px;
-	border-radius: 50%;
-	/* background: #fff -webkit-linear-gradient(transparent, rgba(0, 0, 0, 0.05)); */
-	background-color: rgb(51, 51, 51);
-	border: solid white 2px;
-	outline: solid rgb(51, 51, 51) 3px;
-	cursor: pointer !important;
-	/* box-shadow: 0 1px 2px 0 rgba(34, 36, 38, 0.15),
-    0 0 0 1px rgba(34, 36, 38, 0.15) inset; */
-}
-
-.slider::-moz-range-thumb {
-	width: 10px;
-	height: 10px;
-	border-radius: 50%;
-	background-color: rgb(51, 51, 51);
-	border: solid white 2px;
-	outline: solid rgb(51, 51, 51) 3px;
-	cursor: pointer !important;
-	box-shadow: 0 1px 2px 0 rgba(34, 36, 38, 0.15),
-		0 0 0 1px rgba(34, 36, 38, 0.15) inset;
-}
-
-.slider::-ms-thumb {
-	min-height: 20px;
-	transform: scale(1) !important;
-	width: 25px;
-	height: 25px;
-	border-radius: 50%;
-	background-color: rgb(51, 51, 51);
-	border: solid white 2px;
-	outline: solid rgb(51, 51, 51) 3px;
-}
-
-.slider::-ms-fill-lower {
-	background: #777;
-	border-radius: 10px;
-}
-
-.slider::-ms-fill-upper {
-	background: #ddd;
-	border-radius: 10px;
-}
-
-.texture-options {
-	background: #e0e0e0;
-	border-radius: 3px;
-	margin-bottom: 1em !important;
-	padding: 1em;
-}
-</style>
diff --git a/src/components/properties/GradientProp.vue b/src/components/properties/GradientProp.vue
deleted file mode 100644
index 66afed29..00000000
--- a/src/components/properties/GradientProp.vue
+++ /dev/null
@@ -1,522 +0,0 @@
-<template>
-	<div class="field">
-		<div>
-			<label>{{ prop.displayName }}</label>
-		</div>
-		<div class="input-holder" style="min-height:50px;" ref="inputHolder">
-			<canvas ref="canvas" />
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit, Watch } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { Gradient, GradientPoint } from "@/lib/designer/gradient";
-import { Color } from "@/lib/designer/color";
-import elementResizeDetectorMaker from "element-resize-detector";
-import { IPropertyHolder } from "@/lib/designer/properties";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-import { UndoStack } from "@/lib/undostack";
-
-@Component
-export default class GradientPropertyView extends Vue {
-	@Prop()
-	// FloatProperty
-	prop: any;
-
-	widget: GradientWidget;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	propHolder: IPropertyHolder;
-
-	oldValue: Gradient;
-
-	mounted() {
-		this.widget = new GradientWidget({
-			width: (this.$refs.inputHolder as HTMLDivElement).offsetWidth,
-			canvas: this.$refs.canvas
-		});
-
-		this.oldValue = this.prop.getValue().clone();
-		this.widget.setGradient(this.prop.value.clone());
-		this.widget.onvaluechanged = this.updateChanged;
-		this.widget.oninput = this.updateInput;
-
-		let erd = new elementResizeDetectorMaker();
-		erd.listenTo(this.$refs.inputHolder, element => {
-			var width = element.offsetWidth;
-			var height = element.offsetHeight;
-
-			this.widget.resize(width, height);
-		});
-	}
-
-	beforeDestroy() {
-		this.widget.dispose();
-	}
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	updateInput(gradient: Gradient) {
-		this.propHolder.setProperty(this.prop.name, gradient.clone());
-	}
-
-	updateChanged(gradient: Gradient) {
-		let newValue = gradient.clone();
-		this.propHolder.setProperty(this.prop.name, gradient.clone());
-
-		let action = new PropertyChangeAction(
-			// todo: this is a bad fix, correct fix below
-			() => {
-				this.widget.setGradient(this.prop.getValue());
-			},
-			this.prop.name,
-			this.propHolder,
-			this.oldValue,
-			newValue
-		);
-		UndoStack.current.push(action);
-
-		this.oldValue = newValue.clone();
-	}
-
-	@Watch("prop", { deep: true })
-	gradChanged(oldVal, newVal) {
-		//console.log("grad changed");
-		// if new val is different from widget val
-		// then set gradient
-		// otherwise do nothing
-		// todo: this is the proper fix
-	}
-}
-
-function clamp(val, min, max) {
-	return Math.min(Math.max(val, min), max);
-}
-
-export class Point {
-	constructor(public x: number, public y: number) {}
-}
-
-export class Box {
-	public x: number = 0;
-	public y: number = 0;
-	public width: number = 1;
-	public height: number = 1;
-
-	public isPointInside(px: number, py: number): boolean {
-		if (
-			px >= this.x &&
-			px <= this.x + this.width &&
-			py >= this.y &&
-			py <= this.y + this.height
-		)
-			return true;
-		return false;
-	}
-
-	public setCenter(x: number, y: number) {
-		this.x = x - this.width / 2;
-		this.y = y - this.height / 2;
-	}
-
-	public setCenterX(x: number) {
-		this.x = x - this.width / 2;
-	}
-
-	public setCenterY(y: number) {
-		this.y = y - this.height / 2;
-	}
-
-	public centerX(): number {
-		return this.x + this.width / 2;
-	}
-
-	public centerY(): number {
-		return this.y + this.height / 2;
-	}
-
-	public move(dx: number, dy: number) {
-		this.x += dx;
-		this.y += dy;
-	}
-}
-
-class GradientHandle {
-	xbox: Box;
-	colorBox: Box = new Box();
-
-	gradientPoint: GradientPoint;
-}
-
-export class GradientWidget {
-	canvas: HTMLCanvasElement;
-	ctx: CanvasRenderingContext2D;
-	gradient: Gradient;
-
-	width: number;
-	height: number;
-
-	handles: GradientHandle[];
-	lastMouseDown: Point;
-	hitHandle: GradientHandle;
-	// if the hitHandle is just created then this is true
-	// it prevents the color picking showingup on mouse release
-	// for new handles
-	isNewHandle: boolean;
-
-	handleSize: number;
-
-	onvaluechanged: (gradient: Gradient) => void;
-	oninput: (gradient: Gradient) => void;
-
-	constructor(options: any) {
-		this.width = options.width || 300;
-		this.height = options.height || 50;
-		this.handleSize = options.handleSize || 16;
-
-		this.canvas = options.canvas || document.createElement("canvas");
-		this.canvas.width = this.width;
-		this.canvas.height = this.height;
-		this.ctx = this.canvas.getContext("2d");
-
-		this.handles = Array();
-		this.lastMouseDown = new Point(0, 0);
-		this.isNewHandle = false;
-
-		//this.gradient = new Gradient();
-		this.setGradient(new Gradient());
-		this.bindEvents();
-		this.redrawCanvas();
-	}
-
-	resize(width: number, height: number) {
-		this.canvas.width = width;
-		this.width = width;
-
-		// recalc positions of all handles
-		for (let handle of this.handles) {
-			handle.colorBox.setCenterX(width * handle.gradientPoint.t);
-		}
-
-		this.redrawCanvas();
-	}
-
-	bindEvents() {
-		var self = this;
-		this.canvas.onmousedown = evt => this.onMouseDown(evt);
-
-		//this.canvas.onmouseup = evt => this.onMouseUp(evt);
-		document.documentElement.addEventListener("mouseup", evt =>
-			self.onMouseUp(evt)
-		);
-
-		//this.canvas.onmousemove = this.onMouseMove;
-		document.documentElement.addEventListener("mousemove", evt =>
-			self.onMouseMove(evt)
-		);
-
-		this.canvas.oncontextmenu = function(evt: PointerEvent) {
-			evt.preventDefault();
-		};
-
-		/*
-        this.canvas.onmouseleave = function(evt:MouseEvent)
-        {
-            // cancel dragging
-            self.hitHandle = null;
-            self.redrawCanvas();
-        }
-        */
-	}
-
-	onMouseDown(evt: MouseEvent) {
-		let self = this;
-
-		self.lastMouseDown = getMousePos(self.canvas, evt);
-		self.hitHandle = self.getHitHandle(self.lastMouseDown);
-		self.isNewHandle = false;
-
-		// if no box is hit then add one and make it the drag target
-		if (self.hitHandle == null && evt.button == 0) {
-			var t = self.lastMouseDown.x / self.width;
-			var col = self.gradient.sample(t);
-			var p = self.gradient.addPoint(t, col);
-
-			var handle = self.createGradientHandleFromPoint(p);
-
-			self.handles.push(handle);
-
-			// make handle draggable
-			self.hitHandle = handle;
-			self.isNewHandle = true;
-
-			if (self.oninput) self.oninput(self.gradient);
-			//if (self.onvaluechanged) self.onvaluechanged(self.gradient);
-		} else if (self.hitHandle && evt.button == 2) {
-			// delete handle
-			self.removeHandle(self.hitHandle);
-			self.hitHandle = null;
-
-			if (self.oninput) self.oninput(self.gradient);
-			//if (self.onvaluechanged) self.onvaluechanged(self.gradient);
-		}
-
-		self.redrawCanvas();
-	}
-
-	onMouseUp(evt: MouseEvent) {
-		let self = this;
-
-		var hitPos = getMousePos(self.canvas, evt);
-		if (
-			self.lastMouseDown.x == hitPos.x &&
-			self.lastMouseDown.y == hitPos.y &&
-			self.hitHandle &&
-			!self.isNewHandle
-		) {
-			let hitHandle = self.hitHandle;
-			self.hitHandle = null;
-
-			// show color picker
-			var input = document.createElement("input");
-			input.type = "color";
-			input.value = hitHandle.gradientPoint.color.toHex();
-			input.onchange = function(ev: Event) {
-				// console.log("onchange");
-				// console.log(ev);
-				// console.log(hitHandle);
-				hitHandle.gradientPoint.color = Color.parse(input.value);
-				self.redrawCanvas();
-				//self.hitHandle = null;
-
-				if (self.onvaluechanged) self.onvaluechanged(self.gradient);
-			};
-
-			input.oninput = (ev: Event) => {
-				// console.log(evt);
-				// console.log("oninput");
-
-				hitHandle.gradientPoint.color = Color.parse(input.value);
-				self.redrawCanvas();
-				//self.hitHandle = null;
-
-				if (self.oninput) self.oninput(self.gradient);
-			};
-			input.click();
-
-			//input.onchange = null; // cleanup
-			//self.hitHandle = null;
-		} else if (self.hitHandle) {
-			if (self.onvaluechanged) self.onvaluechanged(self.gradient);
-			self.hitHandle = null;
-		} else {
-			self.hitHandle = null;
-			self.redrawCanvas();
-		}
-	}
-
-	onMouseMove(evt: MouseEvent) {
-		let self = this;
-		//var hitPos = getMousePos(self.canvas, evt);
-		//console.log(self);
-		var hitPos = getMousePos(self.canvas, evt);
-		if (self.hitHandle) {
-			// cap hit pos
-			let x = clamp(hitPos.x, 0, self.width);
-			self.hitHandle.colorBox.setCenterX(x);
-
-			// recalc gradient t
-			var t = x / self.width;
-			self.hitHandle.gradientPoint.t = t;
-
-			// resort handles
-			self.gradient.sort();
-
-			//if (self.onvaluechanged) self.onvaluechanged(self.gradient);
-			if (self.oninput) self.oninput(self.gradient);
-		}
-
-		self.redrawCanvas();
-	}
-
-	removeHandle(handle: GradientHandle) {
-		this.gradient.removePoint(handle.gradientPoint);
-		this.handles.splice(this.handles.indexOf(handle), 1);
-	}
-
-	getHitHandle(pos: Point): GradientHandle {
-		for (let handle of this.handles) {
-			if (handle.colorBox.isPointInside(pos.x, pos.y)) {
-				//console.log("handle hit!");
-				return handle;
-			}
-		}
-
-		return null;
-	}
-
-	setGradient(grad: Gradient) {
-		this.handles = Array();
-		var handleSize = this.handleSize;
-
-		for (let p of grad.points) {
-			var handle = this.createGradientHandleFromPoint(p);
-			this.handles.push(handle);
-		}
-
-		this.gradient = grad;
-
-		this.redrawCanvas();
-	}
-
-	createGradientHandleFromPoint(p: GradientPoint): GradientHandle {
-		var handleSize = this.handleSize;
-
-		var handle = new GradientHandle();
-		handle.gradientPoint = p;
-		// eval point locations
-		var box = handle.colorBox;
-		box.width = handleSize;
-		box.height = handleSize;
-		var x = p.t * this.width;
-		box.setCenterX(x);
-		box.y = this.height - handleSize;
-
-		return handle;
-	}
-
-	public el() {
-		return this.canvas;
-	}
-
-	redrawCanvas() {
-		var ctx = this.ctx;
-
-		ctx.clearRect(0, 0, this.width, this.height);
-
-		var grad = ctx.createLinearGradient(0, 0, this.width, 0);
-		for (let point of this.gradient.points) {
-			grad.addColorStop(point.t, point.color.toHex());
-		}
-
-		ctx.fillStyle = grad;
-		ctx.fillRect(0, 0, this.width, this.height - this.handleSize);
-
-		this.drawHandles();
-	}
-
-	drawHandles() {
-		var ctx = this.ctx;
-		for (let handle of this.handles) {
-			var colBox = handle.colorBox;
-			// background
-			ctx.beginPath();
-			ctx.fillStyle = handle.gradientPoint.color.toHex();
-			//ctx.rect(colBox.x, colBox.y, colBox.width, colBox.height);
-			roundRect(ctx, colBox.x, colBox.y, colBox.width, colBox.height, 1);
-			ctx.fill();
-
-			// border
-			ctx.beginPath();
-			ctx.lineWidth = 2;
-			ctx.strokeStyle = "rgb(0, 0, 0)";
-			//ctx.rect(colBox.x, colBox.y, colBox.width, colBox.height);
-			roundRect(ctx, colBox.x, colBox.y, colBox.width, colBox.height, 1);
-			ctx.stroke();
-
-			// triangle at top
-			ctx.fillStyle = "rgb(0, 0, 0)";
-			ctx.beginPath();
-			ctx.moveTo(colBox.centerX(), colBox.y - 5);
-			ctx.lineTo(colBox.x, colBox.y);
-			ctx.lineTo(colBox.x + colBox.width, colBox.y);
-			ctx.fill();
-		}
-	}
-
-	dispose() {
-		// remove all callbacks
-	}
-}
-
-// https://www.html5canvastutorials.com/advanced/html5-canvas-mouse-coordinates/
-// https://stackoverflow.com/questions/17130395/real-mouse-position-in-canvas
-function getMousePos(canvas, evt) {
-	var rect = canvas.getBoundingClientRect();
-	return {
-		x: evt.clientX - rect.left,
-		y: evt.clientY - rect.top
-	};
-}
-
-//https://stackoverflow.com/questions/10214873/make-canvas-as-wide-and-as-high-as-parent
-function fitCanvasToContainer(canvas) {
-	// Make it visually fill the positioned parent
-	canvas.style.width = "100%";
-	// 1em is the size of the top bar
-	canvas.style.height = "100%";
-	// ...then set the internal size to match
-	canvas.width = canvas.offsetWidth;
-	canvas.height = canvas.offsetHeight;
-	//canvas.height = canvas.offsetWidth;
-
-	canvas.style.width = "auto";
-	canvas.style.height = "auto";
-}
-
-// https://stackoverflow.com/questions/1255512/how-to-draw-a-rounded-rectangle-on-html-canvas
-function roundRect(ctx: CanvasRenderingContext2D, x, y, w, h, r) {
-	if (w < 2 * r) r = w / 2;
-	if (h < 2 * r) r = h / 2;
-	ctx.beginPath();
-	ctx.moveTo(x + r, y);
-	ctx.arcTo(x + w, y, x + w, y + h, r);
-	ctx.arcTo(x + w, y + h, x, y + h, r);
-	ctx.arcTo(x, y + h, x, y, r);
-	ctx.arcTo(x, y, x + w, y, r);
-	ctx.closePath();
-	//ctx.stroke();
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.number {
-	width: calc(100% - 4px - 1px);
-	border: solid gray 1px;
-	padding: 2px;
-	border-radius: 2px;
-}
-
-.input-holder {
-	display: flex;
-}
-
-.texture-options {
-	background: #e0e0e0;
-	border-radius: 3px;
-	margin-bottom: 1em !important;
-	padding: 1em;
-}
-</style>
diff --git a/src/components/properties/ImageProp.vue b/src/components/properties/ImageProp.vue
deleted file mode 100644
index 1639e02a..00000000
--- a/src/components/properties/ImageProp.vue
+++ /dev/null
@@ -1,241 +0,0 @@
-<template>
-	<div class="field">
-		<div>
-			<label>{{ prop.displayName }}</label>
-		</div>
-		<div class="input-holder">
-			<canvas @click="loadImage()" width="150" height="150" ref="canvas" />
-			<div class="image-buttons">
-				<button class="image-button load-button" @click="loadImage()">
-					load
-				</button>
-				<button class="image-button reload-button" @click="reloadImage()">
-					reload
-				</button>
-				<button class="image-button remove-button" @click="removeImage()">
-					remove
-				</button>
-			</div>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit, Ref } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { ImageProperty, IPropertyHolder } from "../../lib/designer/properties";
-import { PropertyChangeComplete } from "./ipropertyui";
-import { UndoStack } from "@/lib/undostack";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-import { Image } from "@/lib/designer/image";
-import * as fs from "fs";
-
-const electron = require("electron");
-const remote = require("@electron/remote");
-const { dialog, app, BrowserWindow, Menu } = remote;
-
-@Component
-export default class ImagePropertyView extends Vue {
-	@Prop()
-	prop: any; // HTMLImagelElement
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	propHolder: IPropertyHolder;
-
-	@Ref("canvas")
-	canvas: HTMLCanvasElement;
-
-	val: Image = null;
-
-	mounted() {
-		this.val = this.prop.value;
-		this.renderImageToCanvas();
-	}
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	@Emit()
-	propertyChangeCompleted(evt: PropertyChangeComplete) {
-		return evt;
-	}
-
-	undoUpdate() {
-		this.val = this.prop.value;
-		this.renderImageToCanvas();
-	}
-
-	loadImage() {
-		let paths = dialog.showOpenDialogSync(remote.getCurrentWindow(), {
-			filters: [
-				{
-					name: "Supported Images",
-					extensions: ["png", "jpg"]
-				}
-			],
-			defaultPath: "image"
-		});
-
-		if (!paths || paths.length == 0) return;
-
-		this.loadImageFromPath(paths[0]);
-	}
-
-	reloadImage() {
-		let path = null;
-		if (this.val && this.val.path) {
-			path = this.val.path;
-		}
-
-		if (path === null) {
-			return;
-		}
-
-		if (fs.existsSync(path)) {
-			this.loadImageFromPath(path);
-		} else {
-			alert("Image file doesn't exist: '" + path + "'");
-		}
-	}
-
-	private loadImageFromPath(filePath: string) {
-		let path = "image://" + filePath;
-		let img: HTMLImageElement = document.createElement(
-			"img"
-		) as HTMLImageElement;
-
-		img.onload = () => {
-			console.log("image loaded");
-
-			// flip image
-			let canvas = document.createElement("canvas");
-			canvas.width = img.width;
-			canvas.height = img.height;
-			let ctx = canvas.getContext("2d");
-			ctx.save();
-			ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
-			ctx.translate(0, img.height);
-			ctx.scale(1, -1);
-			ctx.drawImage(img, 0, 0, img.width, img.height);
-			ctx.restore();
-
-			// create image object
-			// let image = new Image(path, img, img.width, img.height);
-			let image = new Image(filePath, canvas, canvas.width, canvas.height);
-
-			let action = new PropertyChangeAction(
-				() => {
-					this.undoUpdate();
-				},
-				this.prop.name,
-				this.propHolder,
-				this.val,
-				image
-			);
-			UndoStack.current.push(action);
-
-			this.val = image;
-			this.propHolder.setProperty(this.prop.name, image);
-			this.renderImageToCanvas();
-		};
-
-		img.src = path;
-	}
-
-	removeImage() {
-		let image = Image.empty();
-
-		let action = new PropertyChangeAction(
-			() => {
-				this.undoUpdate();
-			},
-			this.prop.name,
-			this.propHolder,
-			this.val,
-			image
-		);
-		UndoStack.current.push(action);
-
-		this.val = image;
-		this.propHolder.setProperty(this.prop.name, image);
-		this.renderImageToCanvas();
-	}
-
-	renderImageToCanvas() {
-		requestAnimationFrame(() => {
-			console.log(this);
-
-			if (!this.$refs.canvas) return;
-
-			let ctx = (this.$refs.canvas as HTMLCanvasElement).getContext("2d");
-			let c = this.val.canvas;
-			ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
-
-			if (this.val == null) return;
-
-			if (this.val.isEmpty) return;
-
-			ctx.save();
-			ctx.translate(0, this.canvas.height);
-			ctx.scale(1, -1);
-			ctx.drawImage(c, 0, 0, this.canvas.width, this.canvas.height);
-			ctx.restore();
-		});
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.texture-options {
-	background: #e0e0e0;
-	border-radius: 3px;
-	margin-bottom: 1em !important;
-	padding: 1em;
-}
-
-.input-holder {
-	display: flex;
-}
-
-.image-buttons {
-	display: flex;
-	flex-direction: column;
-	margin-left: 5px;
-}
-
-.image-button {
-	width: 48px;
-	height: 48px;
-	margin: 1px;
-	box-sizing: border-box;
-	background: #222;
-	border: none;
-	color: white;
-	padding: 0;
-	cursor: pointer;
-	border-radius: 4px;
-}
-
-.image-button:hover {
-	background: rgb(88, 88, 88);
-}
-</style>
diff --git a/src/components/properties/RandomSeedProp.vue b/src/components/properties/RandomSeedProp.vue
deleted file mode 100644
index f833560f..00000000
--- a/src/components/properties/RandomSeedProp.vue
+++ /dev/null
@@ -1,198 +0,0 @@
-<template>
-	<div class="field">
-		<div>
-			<label>Random Seed</label>
-		</div>
-		<div class="input-holder">
-			<div style="width:100%; margin-right:10px;padding:0.4em;">
-				<input
-					type="range"
-					:min="0"
-					:max="50"
-					:value="randomSeed"
-					:step="1"
-					@input="updateValue"
-					class="slider"
-					@mousedown="focus"
-					@mouseup="blur"
-				/>
-			</div>
-			<div style="width:70px;">
-				<input
-					type="number"
-					:value="randomSeed"
-					:step="1"
-					@input="updateValue"
-					class="number"
-					@focus="focus"
-					@blur="blur"
-				/>
-			</div>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { UndoStack } from "@/lib/undostack";
-import { SetNodeRandomSeedAction } from "@/lib/actions/setnoderandomseedaction";
-
-@Component
-export default class RandomSeedPropertyView extends Vue {
-	@Prop()
-	node: DesignerNode;
-
-	randomSeed: number = 0;
-	oldValue: number = 0;
-
-	mounted() {
-		this.randomSeed = this.node.randomSeed;
-		this.oldValue = this.randomSeed;
-	}
-
-	updateValue(evt) {
-		this.node.setRandomSeed(evt.target.value);
-		this.randomSeed = evt.target.value;
-	}
-
-	// update called after undo action
-	undoUpdate() {
-		this.randomSeed = this.node.randomSeed;
-	}
-
-	focus() {
-		this.oldValue = this.randomSeed;
-	}
-
-	blur() {
-		let action = new SetNodeRandomSeedAction(
-			() => {
-				this.undoUpdate();
-			},
-			this.node,
-			this.oldValue,
-			this.randomSeed
-		);
-
-		UndoStack.current.push(action);
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.number {
-	width: calc(100% - 1em - 1px);
-	border: solid transparent 1px;
-	border-radius: 4px;
-	position: relative;
-	outline: none;
-
-	background: #4e4e4e;
-	color: rgba(255, 255, 255, 0.8);
-	padding: 0.5em;
-}
-
-.number:focus {
-	border-color: dodgerblue;
-}
-
-.number::-webkit-inner-spin-button {
-	width: 1em;
-	border-left: 1px solid #bbb;
-	opacity: 1;
-	color: rgb(130, 130, 130);
-	position: absolute;
-	top: 0;
-	right: 0;
-	bottom: 0;
-	cursor: pointer;
-}
-
-.input-holder {
-	display: flex;
-}
-
-/* https://www.w3schools.com/howto/howto_js_rangeslider.asp */
-/* http://jsfiddle.net/brenna/f4uq9edL/?utm_source=website&utm_medium=embed&utm_campaign=f4uq9edL */
-.slider {
-	-webkit-appearance: none;
-	width: 100%;
-	height: 3px;
-	border-radius: 5px;
-	background-color: rgb(255, 255, 255, 0.7);
-	color: rgba(0, 0, 0);
-	outline: none;
-	-webkit-transition: 0.2s;
-	transition: opacity 0.2s;
-}
-
-.slider::-webkit-slider-thumb {
-	-webkit-appearance: none;
-	appearance: none;
-	width: 17px;
-	height: 17px;
-	border-radius: 50%;
-	/* background: #fff -webkit-linear-gradient(transparent, rgba(0, 0, 0, 0.05)); */
-	background-color: rgb(51, 51, 51);
-	border: solid white 2px;
-	outline: solid rgb(51, 51, 51) 3px;
-	cursor: pointer !important;
-	/* box-shadow: 0 1px 2px 0 rgba(34, 36, 38, 0.15),
-    0 0 0 1px rgba(34, 36, 38, 0.15) inset; */
-}
-
-.slider::-moz-range-thumb {
-	width: 10px;
-	height: 10px;
-	border-radius: 50%;
-	background-color: rgb(51, 51, 51);
-	border: solid white 2px;
-	outline: solid rgb(51, 51, 51) 3px;
-	cursor: pointer !important;
-	box-shadow: 0 1px 2px 0 rgba(34, 36, 38, 0.15),
-		0 0 0 1px rgba(34, 36, 38, 0.15) inset;
-}
-
-.slider::-ms-thumb {
-	min-height: 20px;
-	transform: scale(1) !important;
-	width: 25px;
-	height: 25px;
-	border-radius: 50%;
-	background-color: rgb(51, 51, 51);
-	border: solid white 2px;
-	outline: solid rgb(51, 51, 51) 3px;
-}
-
-.slider::-ms-fill-lower {
-	background: #777;
-	border-radius: 10px;
-}
-
-.slider::-ms-fill-upper {
-	background: #ddd;
-	border-radius: 10px;
-}
-
-.texture-options {
-	background: #e0e0e0;
-	border-radius: 3px;
-	margin-bottom: 1em !important;
-	padding: 1em;
-}
-</style>
diff --git a/src/components/properties/StringProp.vue b/src/components/properties/StringProp.vue
deleted file mode 100644
index 5663d390..00000000
--- a/src/components/properties/StringProp.vue
+++ /dev/null
@@ -1,110 +0,0 @@
-<template>
-	<div class="field">
-		<div>
-			<label>{{ prop.displayName }}</label>
-		</div>
-		<div class="input-holder">
-			<div style="width:95%; margin-right:10px">
-				<textarea
-					v-if="prop.isMultiline"
-					:value="prop.value"
-					@input="updateValue"
-					style="width:100%"
-					rows="5"
-					@focus="focus"
-					@blur="blur"
-				></textarea>
-				<input
-					v-if="!prop.isMultiline"
-					type="text"
-					:value="prop.value"
-					@input="updateValue"
-					style="width:100%"
-					@focus="focus"
-					@blur="blur"
-				/>
-			</div>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { IPropertyHolder } from "../../lib/designer/properties";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-import { UndoStack } from "@/lib/undostack";
-
-@Component
-export default class StringPropertyView extends Vue {
-	@Prop()
-	// FloatProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	propHolder: IPropertyHolder;
-
-	oldValue: number;
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	updateValue(evt) {
-		this.propHolder.setProperty(this.prop.name, evt.target.value);
-		this.propertyChanged();
-	}
-
-	focus() {
-		this.oldValue = this.prop.value;
-	}
-
-	blur() {
-		let action = new PropertyChangeAction(
-			() => this.undoUpdate(),
-			this.prop.name,
-			this.propHolder,
-			this.oldValue,
-			this.prop.value
-		);
-		UndoStack.current.push(action);
-	}
-
-	// update called after undo action
-	undoUpdate() {
-		this.$forceUpdate();
-		this.propertyChanged();
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.number {
-	width: calc(100% - 4px - 1px);
-	border: solid gray 1px;
-	padding: 2px;
-	border-radius: 2px;
-}
-
-.input-holder {
-	display: flex;
-}
-</style>
diff --git a/src/components/properties/TextureChannelProp.vue b/src/components/properties/TextureChannelProp.vue
deleted file mode 100644
index b627aecb..00000000
--- a/src/components/properties/TextureChannelProp.vue
+++ /dev/null
@@ -1,127 +0,0 @@
-<template>
-	<div class="field">
-		<label>Texture Channel</label>
-		<div :key="key">
-			<select class="enum" @change="updateValue">
-				<option
-					v-for="(opt, index) in channelNames"
-					:value="index"
-					:key="index"
-					:selected="index == channelIndex"
-					>{{ opt }}</option
-				>
-			</select>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit, Watch } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { Editor } from "@/lib/editor";
-import { ChangeTextureChannelAction } from "../../lib/actions/changetexturechannelaction";
-import { UndoStack } from "../../lib/undostack";
-
-@Component
-export default class TextureChannelPropertyView extends Vue {
-	channelNames = [
-		"none",
-		"albedo",
-		"normal",
-		"metalness",
-		"roughness",
-		"height",
-		"emission",
-		"ao",
-		"alpha"
-	];
-	channelIndex: number = 0;
-	key: number = 0;
-
-	@Prop()
-	editor: Editor;
-
-	@Prop()
-	node: DesignerNode;
-
-	mounted() {
-		this.calculateChannelIndex();
-	}
-
-	calculateChannelIndex() {
-		this.channelIndex = 0;
-		for (let channelName of this.editor.textureChannels.keys()) {
-			if (this.editor.textureChannels.get(channelName) == null) continue;
-
-			if (this.editor.textureChannels.get(channelName).id == this.node.id) {
-				this.channelIndex = this.channelNames.indexOf(channelName);
-			}
-		}
-
-		this.key += 1;
-	}
-
-	updateValue(evt) {
-		let index = evt.currentTarget.value;
-		//set channel in editor
-		let channelName = this.channelNames[index];
-
-		//fetch params for undo/redo
-		let node2 = null;
-		let channel2 = index == 0 ? null : channelName;
-
-		let nodeView = this.editor.graph.getNodeById(this.node.id);
-		let channel1 = nodeView.textureChannel;
-		if (this.editor.textureChannels.has(channelName))
-			node2 = this.editor.textureChannels.get(channelName).id;
-		let node1 = this.node.id;
-
-		if (index != 0) {
-			this.editor.assignNodeToTextureChannel(this.node.id, channelName);
-		} else {
-			this.editor.clearTextureChannel(this.node.id);
-		}
-
-		let action = new ChangeTextureChannelAction(
-			() => this.calculateChannelIndex(),
-			this.editor,
-			node1,
-			channel1,
-			node2,
-			channel2
-		);
-		UndoStack.current.push(action);
-	}
-}
-</script>
-
-<style scoped>
-.field {
-	font-size: 12px;
-	padding: 0.9em 0.5em;
-	color: rgba(255, 255, 255, 0.7);
-	border-bottom: 1px rgb(61, 61, 61) solid;
-}
-
-.field label {
-	font-weight: bold;
-	padding: 0.4em;
-	padding-left: 0;
-}
-
-.enum {
-	outline: 0;
-	box-shadow: none;
-	border: 0 !important;
-
-	margin-top: 0.4em;
-	width: 100%;
-	border: none;
-	border-radius: 4px;
-	color: white;
-	background: #222;
-	padding: 0.5em;
-	font-family: "Open Sans";
-}
-</style>
diff --git a/src/components/properties/ipropertyui.ts b/src/components/properties/ipropertyui.ts
deleted file mode 100644
index d37fe32c..00000000
--- a/src/components/properties/ipropertyui.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export interface IProperyUi {
-	refresh();
-}
-
-export class PropertyChangeComplete {
-	public propName: string;
-	public oldValue: any;
-	public newValue: any;
-}
diff --git a/src/components/variables/BoolVar.vue b/src/components/variables/BoolVar.vue
deleted file mode 100644
index ef95130d..00000000
--- a/src/components/variables/BoolVar.vue
+++ /dev/null
@@ -1,35 +0,0 @@
-<template>
-	<div class="field">
-		<label>{{ prop.displayName }}</label>
-		<input type="checkbox" :value="prop.value" @input="updateValue" />
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-
-@Component
-export default class BoolVariableView extends Vue {
-	@Prop()
-	// BoolProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	node: DesignerNode;
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	updateValue(evt) {
-		this.designer.setVariable(this.prop.name, evt.target.value);
-		this.propertyChanged();
-	}
-}
-</script>
diff --git a/src/components/variables/ColorVar.vue b/src/components/variables/ColorVar.vue
deleted file mode 100644
index 14766338..00000000
--- a/src/components/variables/ColorVar.vue
+++ /dev/null
@@ -1,40 +0,0 @@
-<template>
-	<div class="field">
-		<label>{{ prop.displayName }}</label>
-		<input
-			type="color"
-			:value="prop.value.toHex()"
-			@input="updateValue"
-			style="width:100%"
-		/>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-
-@Component
-export default class ColorVariableView extends Vue {
-	@Prop()
-	// ColorProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	node: DesignerNode;
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	updateValue(evt) {
-		this.designer.setVariable(this.prop.name, evt.target.value);
-		this.propertyChanged();
-	}
-}
-</script>
diff --git a/src/components/variables/EnumVar.vue b/src/components/variables/EnumVar.vue
deleted file mode 100644
index 97047e59..00000000
--- a/src/components/variables/EnumVar.vue
+++ /dev/null
@@ -1,43 +0,0 @@
-<template>
-	<div class="field">
-		<label>{{ prop.displayName }}</label>
-		<select @change="updateValue">
-			<option
-				v-for="(opt, index) in prop.values"
-				:value="index"
-				:key="index"
-				:selected="index == prop.index"
-				>{{ opt }}</option
-			>
-		</select>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-
-@Component
-export default class EnumVariableView extends Vue {
-	@Prop()
-	// EnumProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	node: DesignerNode;
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	updateValue(evt) {
-		this.designer.setVariable(this.prop.name, evt.target.value);
-		this.propertyChanged();
-	}
-}
-</script>
diff --git a/src/components/variables/FloatVar.vue b/src/components/variables/FloatVar.vue
deleted file mode 100644
index dbb038b5..00000000
--- a/src/components/variables/FloatVar.vue
+++ /dev/null
@@ -1,106 +0,0 @@
-<template>
-	<div class="field">
-		<label>{{ prop.displayName }}</label>
-		<input
-			type="range"
-			:min="prop.minValue"
-			:max="prop.maxValue"
-			:value="prop.value"
-			:step="prop.step"
-			@input="updateValue"
-			class="slider"
-		/>
-	</div>
-</template>
-
-<script lang="ts">
-import { Vue, Prop, Component, Emit } from "vue-property-decorator";
-import { Designer } from "@/lib/designer";
-import { DesignerNode } from "@/lib/designer/designernode";
-
-@Component
-export default class FloatVariableView extends Vue {
-	@Prop()
-	// FloatProperty
-	prop: any;
-
-	@Prop()
-	designer: Designer;
-
-	@Prop()
-	node: DesignerNode;
-
-	@Emit()
-	propertyChanged() {
-		return this.prop.name;
-	}
-
-	updateValue(evt) {
-		this.designer.setVariable(this.prop.name, evt.target.value);
-		this.propertyChanged();
-	}
-}
-</script>
-
-<style scoped>
-/* https://www.w3schools.com/howto/howto_js_rangeslider.asp */
-/* http://jsfiddle.net/brenna/f4uq9edL/?utm_source=website&utm_medium=embed&utm_campaign=f4uq9edL */
-.slider {
-	-webkit-appearance: none;
-	width: 100%;
-	height: 4px;
-	border-radius: 4px;
-	background-color: rgba(0, 0, 0);
-	color: rgba(0, 0, 0);
-	outline: none;
-	-webkit-transition: 0.2s;
-	transition: opacity 0.2s;
-}
-
-.slider::-webkit-slider-thumb {
-	-webkit-appearance: none;
-	appearance: none;
-	width: 20px;
-	height: 20px;
-	border-radius: 50%;
-	background: #fff -webkit-linear-gradient(transparent, rgba(0, 0, 0, 0.05));
-	cursor: pointer;
-	box-shadow: 0 1px 2px 0 rgba(34, 36, 38, 0.15),
-		0 0 0 1px rgba(34, 36, 38, 0.15) inset;
-}
-
-.slider::-moz-range-thumb {
-	width: 25px;
-	height: 25px;
-	border-radius: 50%;
-	background: #fff -webkit-linear-gradient(transparent, rgba(0, 0, 0, 0.05));
-	cursor: pointer;
-	box-shadow: 0 1px 2px 0 rgba(34, 36, 38, 0.15),
-		0 0 0 1px rgba(34, 36, 38, 0.15) inset;
-}
-
-.slider::-ms-thumb {
-	min-height: 20px;
-	transform: scale(1) !important;
-	width: 25px;
-	height: 25px;
-	border-radius: 50%;
-}
-
-.slider::-ms-fill-lower {
-	background: #777;
-	border-radius: 10px;
-}
-
-.slider::-ms-fill-upper {
-	background: #ddd;
-	border-radius: 10px;
-}
-
-.texture-options {
-	background: #e0e0e0;
-	border-radius: 3px;
-	margin-bottom: 1em !important;
-	padding: 1em;
-}
-</style>
diff --git a/src/export.ts b/src/export.ts
deleted file mode 100644
index f30735c9..00000000
--- a/src/export.ts
+++ /dev/null
@@ -1,375 +0,0 @@
-import jimp from "jimp";
-import sharp from "sharp";
-import { Editor } from "./lib/editor";
-import { BitDepth, encode } from "fast-png";
-import fs from "fs";
-import { PNG } from "pngjs";
-import {
-	Float16Array,
-	isFloat16Array,
-	getFloat16,
-	setFloat16,
-	hfround
-} from "@petamoriken/float16";
-import {
-	TextureComponents,
-	TextureDataConverter
-} from "./lib/designer/texturedataconverter";
-import { TextureDataType } from "./lib/designer/gl";
-import { DesignerNode } from "./lib/designer/designernode";
-import { Designer } from "./lib/designer";
-import AdmZip from "adm-zip";
-import path from "path";
-import electron from "electron";
-
-export enum ImageFileType {
-	Png = "png",
-	Jpg = "jpg",
-	Tga = "tga",
-	Tif = "tif"
-}
-
-export enum ColorSpace {
-	Linear = "linear",
-	sRGB = "srgb"
-}
-
-export enum OutputType {
-	Folder,
-	Zip,
-	UnityPackage
-}
-
-export enum TextureTransform {
-	InvertX,
-	InvertY,
-	InvertZ,
-	LinearizeRoughness
-}
-
-export class ExportTextureSettings {
-	channelName: string = ""; // albedo, roughness, normal, etc..
-	colorSpace: ColorSpace = ColorSpace.Linear;
-	fileType: ImageFileType = ImageFileType.Png;
-	transforms: TextureTransform[] = [];
-}
-
-// can have multiple settings and presets
-export class ExportSettings {
-	name: string = "";
-	filePattern: string = "{project}_{file}";
-	// textureSettings: Map<string, ExportTextureSettings> = new Map<
-	// 	string,
-	// 	ExportTextureSettings
-	// >();
-	// enabled: boolean = true;
-	outputType: OutputType = OutputType.Zip;
-	outputPath: string = "";
-}
-
-export class Exporter {
-	async export(editor: Editor, settings: ExportSettings) {
-		const designer = editor.designer;
-		const conv = new TextureDataConverter(editor.designer.gl);
-		// sample config
-
-		// assume the settings have all the nodes listen already
-		// settings is the source of truth
-		console.log(editor.textureChannels);
-
-		const exportNodes = this.gatherExportNodes(designer, editor);
-		console.log(exportNodes);
-
-		let files: Map<string, ArrayBuffer> = new Map<string, ArrayBuffer>();
-
-		for (const node of exportNodes) {
-			const channelNode = node.node;
-
-			// const pixelData = channelNode.getPixelData();
-			// const pixelData = conv.getData(
-			// 	channelNode.node.tex,
-			// 	designer.width,
-			// 	designer.height,
-			// 	TextureDataType.Uint16,
-			// 	TextureComponents.RGBA,
-			// 	true
-			// );
-
-			const pixelData = conv.getData(
-				channelNode.tex,
-				designer.width,
-				designer.height,
-				node.dataType,
-				node.components,
-				true
-			);
-
-			// too expensive
-			// convertRange(pixelData);
-
-			// console.log(pixelData);
-			// console.log(floatData);
-			// for (let i = 0; i < 20; i++) {
-			// 	console.log(floatData[i]);
-			// }
-
-			// const exportPath =
-			// 	"C:/Users/Nicolas Brown/Desktop/export-" + node.name + ".png";
-			// console.log("exporting to: " + exportPath);
-
-			const fileData = exportNodeAsPng(
-				node,
-				pixelData,
-				designer.width,
-				designer.height
-			);
-
-			const projectName = settings.name
-				.replace(" ", "_")
-				.replace(/[^0-9a-zA-Z_]/g, "");
-
-			const fileName = interpolateString(settings.filePattern, {
-				project: projectName,
-				name: node.name
-			});
-
-			// files.set(node.name + ".png", fileData);
-			files.set(fileName + ".png", fileData);
-
-			// write to file if folder mode
-			// fs.writeFile(exportPath, bytes, function(err) {
-			// 	if (err) alert("Error exporting texture: " + err);
-			// });
-
-			// write to zip otherwise
-
-			// const imgCanvas = editor.getChannelCanvasImage(channelName);
-			// if (imgCanvas) {
-			// 	const imgData = imgCanvas.canvas.toDataURL("image/png");
-
-			// 	//todo: get raw image data from gpu in floating point
-			// }
-		}
-
-		if (settings.outputType == OutputType.Folder) {
-			exportFilesToFolder(files, settings.outputPath);
-		} else {
-			exportFilesToZip(files, settings.outputPath);
-			electron.remote.shell.showItemInFolder(settings.outputPath);
-		}
-
-		// export them
-
-		// const image = await jimp.read("");
-	}
-
-	calculateFileName(fileName: string, project: string): string {
-		return null;
-	}
-
-	// returns all nodes ready for export with their data
-	// todo: use display channel if no name property specified
-	gatherExportNodes(designer: Designer, editor: Editor) {
-		// gather all export nodes
-		// let exportNodes = [];
-
-		let nodes = designer.nodes.filter(x => x.typeName === "output");
-
-		let exportNodes: ExportNode[] = [];
-
-		for (const node of nodes) {
-			let exportNode = new ExportNode();
-
-			exportNode.node = node;
-			for (const prop of node.properties) {
-				if (prop.name === "name") {
-					exportNode.name = prop.getValue();
-				}
-				if (prop.name === "precision") {
-					const precision = prop.getValue() as number;
-
-					// 0 -> 8bits
-					// 1 -> 16bits
-					if (precision === 0) exportNode.dataType = TextureDataType.Uint8;
-					if (precision === 1) exportNode.dataType = TextureDataType.Uint16;
-				}
-				if (prop.name === "components") {
-					const components = prop.getValue() as number;
-
-					// 0 -> RGBA
-					// 1 -> RGB
-					// 2 -> R
-					// 3 -> G
-					// 4 -> B
-					// 5 -> A
-					if (components === 0) exportNode.components = TextureComponents.RGBA;
-					if (components === 1) exportNode.components = TextureComponents.RGB;
-					if (components === 2) exportNode.components = TextureComponents.R;
-					if (components === 3) exportNode.components = TextureComponents.G;
-					if (components === 4) exportNode.components = TextureComponents.B;
-					if (components === 5) exportNode.components = TextureComponents.A;
-				}
-			}
-
-			if (!exportNode.name || exportNode.name === "") {
-				exportNode.name = getChannelNameForNode(exportNode.node, editor);
-			}
-
-			exportNodes.push(exportNode);
-		}
-
-		return exportNodes;
-	}
-}
-
-function getChannelNameForNode(node: DesignerNode, editor: Editor) {
-	const channels = editor.textureChannels;
-	// slow.
-	// create dictionary with nodeId as key instead
-	for (const key of channels.keys()) {
-		if (channels.get(key) === node) return key;
-	}
-
-	return "";
-}
-
-function exportNodeAsPng(
-	node: ExportNode,
-	pixelData: ArrayBuffer,
-	width: number,
-	height: number
-): ArrayBuffer {
-	try {
-		let bitDepth: BitDepth = 8;
-		if (node.dataType === TextureDataType.Uint16) bitDepth = 16;
-
-		let channels: number = 4;
-		// if (node.components === TextureComponents.RGBA) channels = 4;
-		if (node.components === TextureComponents.RGB) channels = 3;
-		if (
-			node.components === TextureComponents.R ||
-			node.components === TextureComponents.G ||
-			node.components === TextureComponents.B ||
-			node.components === TextureComponents.A
-		)
-			channels = 1;
-
-		// FAST-PNG
-		const bytes = encode({
-			data:
-				bitDepth == 8 ? new Uint8Array(pixelData) : new Uint16Array(pixelData),
-			width: width,
-			height: height,
-			depth: bitDepth,
-			channels: channels
-		});
-
-		return bytes.buffer;
-
-		// fs.writeFile(exportPath, bytes, function(err) {
-		// 	if (err) alert("Error exporting texture: " + err);
-		// });
-
-		// await sharp(pixelData, {
-		// 	raw: {
-		// 		width: editor.designer.width,
-		// 		height: editor.designer.height,
-		// 		channels: 4
-		// 	}
-		// })
-		// 	// .pipelineColourspace("rgb")
-		// 	// .toColorspace("rgb")
-		// 	.png({})
-		// 	.toFile(exportPath);
-
-		// PNGJS
-		// https://github.com/lukeapage/pngjs/blob/master/examples/16bit_write.js
-		// let png = new PNG({
-		// 	width: editor.designer.width,
-		// 	height: editor.designer.height,
-		// 	inputColorType: 6,
-		// 	colorType: 6,
-		// 	bitDepth: 16,
-		// 	inputHasAlpha: true
-		// });
-
-		// png.data = Buffer.from(pixelData);
-		// png.gamma = 1;
-		// png.pack().pipe(fs.createWriteStream(exportPath));
-	} catch (error) {
-		console.log("error saving file");
-		console.log(error);
-	}
-}
-
-class ExportNode {
-	node: DesignerNode;
-	components: TextureComponents = TextureComponents.RGBA;
-	dataType: TextureDataType = TextureDataType.Uint8;
-	name: string = "";
-}
-
-function exportFilesToFolder(
-	files: Map<string, ArrayBuffer>,
-	folderPath: string
-) {
-	for (let fileName of files.keys()) {
-		console.log(fileName);
-		const exportPath = path.join(folderPath, fileName);
-		const bytes = files.get(fileName);
-
-		fs.writeFile(exportPath, new Uint8Array(bytes), function(err) {
-			if (err) alert("Error exporting texture: " + err);
-		});
-	}
-}
-function exportFilesToZip(
-	files: Map<string, ArrayBuffer>,
-	zipFilePath: string
-) {
-	const zip = new AdmZip();
-
-	for (let fileName of files.keys()) {
-		const bytes = files.get(fileName);
-		console.log(bytes);
-		zip.addFile(fileName, Buffer.from(bytes));
-	}
-
-	zip.writeZip(zipFilePath);
-}
-
-function convertRange(data: Uint16Array) {
-	const UINT_MAX = 65535.0;
-	const VALUE_MAX = 15360.0;
-
-	const floatData = new Float16Array(data.buffer);
-	for (let i = 0; i < data.length; i++) {
-		// if (i < 10) console.log(floatData[i] * UINT_MAX);
-		data[i] = floatData[i] * UINT_MAX;
-	}
-}
-
-function interpolateString(text: string, exportData: object) {
-	if (!text) return "";
-
-	// run regex on text and replace values from the string
-	text = text.replace(
-		/\${([a-z]+)}/g,
-		(wholeMatch: string, path: any): string => {
-			// console.log(path);
-			const data = exportData[path];
-			if (!data) return "";
-
-			return data;
-		}
-	);
-
-	// console.log(text);
-
-	return text;
-}
-
-// class PixelDataConverter
-// {
-// 	public static rgbaTo
-// }
diff --git a/src/iapp.ts b/src/iapp.ts
deleted file mode 100644
index 6f463340..00000000
--- a/src/iapp.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export interface IApp {
-	randomSeed: number;
-}
diff --git a/src/lib/actions/addconnectionaction.ts b/src/lib/actions/addconnectionaction.ts
deleted file mode 100644
index 65ad4cb8..00000000
--- a/src/lib/actions/addconnectionaction.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2 } from "../scene/view";
-import { ConnectionGraphicsItem } from "../scene/connectiongraphicsitem";
-import { NodeScene } from "../scene";
-
-export class AddConnectionAction extends Action {
-	scene: NodeScene;
-	con: ConnectionGraphicsItem;
-
-	constructor(scene: NodeScene, con: ConnectionGraphicsItem) {
-		super();
-
-		this.scene = scene;
-		this.con = con;
-	}
-
-	undo() {
-		this.scene.removeConnection(this.con);
-	}
-
-	redo() {
-		this.scene.addConnection(this.con);
-	}
-}
diff --git a/src/lib/actions/additemsaction.ts b/src/lib/actions/additemsaction.ts
deleted file mode 100644
index 4223ef1f..00000000
--- a/src/lib/actions/additemsaction.ts
+++ /dev/null
@@ -1,107 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2 } from "../scene/view";
-import { ConnectionGraphicsItem } from "../scene/connectiongraphicsitem";
-import { NodeScene } from "../scene";
-import { FrameGraphicsItem } from "../scene/framegraphicsitem";
-import { CommentGraphicsItem } from "../scene/commentgraphicsitem";
-import { NodeGraphicsItem } from "../scene/nodegraphicsitem";
-import { NavigationGraphicsItem } from "../scene/navigationgraphicsitem";
-import { DesignerNode } from "../designer/designernode";
-import { Designer } from "../designer";
-
-// used when items are added to the scene
-// also used for paste events
-export class AddItemsAction extends Action {
-	scene: NodeScene;
-	designer: Designer;
-	frames: FrameGraphicsItem[];
-	comments: CommentGraphicsItem[];
-	navs: NavigationGraphicsItem[];
-	cons: ConnectionGraphicsItem[];
-	nodes: NodeGraphicsItem[];
-	dnodes: DesignerNode[];
-
-	constructor(
-		scene: NodeScene,
-		designer: Designer,
-		frames: FrameGraphicsItem[],
-		comments: CommentGraphicsItem[],
-		navs: NavigationGraphicsItem[],
-		cons: ConnectionGraphicsItem[],
-		nodes: NodeGraphicsItem[],
-		dnodes: DesignerNode[]
-	) {
-		super();
-
-		this.scene = scene;
-		this.designer = designer;
-		this.frames = frames;
-		this.comments = comments;
-		this.navs = navs;
-		this.cons = cons;
-		this.nodes = nodes;
-		this.dnodes = dnodes;
-	}
-
-	undo() {
-		for (const frame of this.frames) {
-			this.scene.removeFrame(frame);
-		}
-
-		for (const comment of this.comments) {
-			this.scene.removeComment(comment);
-		}
-
-		for (const nav of this.navs) {
-			this.scene.removeNavigation(nav);
-		}
-
-		// for (let dnode of this.dnodes) {
-		// 	this.designer.addNode(dnode, false);
-		// }
-
-		// relying on callbacks to add the connection
-		// in designer
-		for (const con of this.cons) {
-			this.scene.removeConnection(con);
-		}
-
-		// also relying callbacks to have the node deleted in designer
-		// note: texture channel gets removed here if assigned
-		//       since texture channels are not assigned upon a node being
-		//		 added to a scene then there is no need to attempt to
-		//		 reassign any
-		for (const node of this.nodes) {
-			this.scene.deleteNode(node);
-		}
-	}
-
-	redo() {
-		for (const frame of this.frames) {
-			this.scene.addFrame(frame);
-		}
-
-		for (const comment of this.comments) {
-			this.scene.addComment(comment);
-		}
-
-		for (const nav of this.navs) {
-			this.scene.addNavigation(nav);
-		}
-
-		for (const node of this.nodes) {
-			this.scene.addNode(node);
-		}
-
-		for (const dnode of this.dnodes) {
-			this.designer.addNode(dnode, false);
-		}
-
-		// relying on callbacks to add the connection
-		// in designer
-		for (const con of this.cons) {
-			this.scene.addConnection(con);
-		}
-	}
-}
diff --git a/src/lib/actions/changetexturechannelaction.ts b/src/lib/actions/changetexturechannelaction.ts
deleted file mode 100644
index 57c128df..00000000
--- a/src/lib/actions/changetexturechannelaction.ts
+++ /dev/null
@@ -1,89 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2, Rect } from "../scene/view";
-import { FrameGraphicsItem } from "../scene/framegraphicsitem";
-import { Editor } from "../editor";
-
-/*
-FROM
-
-node1 --> channel1
-
-ndoe2 --> channel2
-
-OR
-
-node1 --> channel1
-
-      --> channel2
-
-
-TO
-
-node1 \	  channel1
-       \
-node2   \-> channel2
-
-OR
-
-node1 \	  channel1
-       \
-        \-> channel2
-
-NOTE:
-node2 might be null
-if channel2 is null then we just remove the channel
-*/
-export class ChangeTextureChannelAction extends Action {
-	ui: () => void;
-	editor: Editor;
-	node1: string;
-	node2: string;
-	channel1: string;
-	channel2: string;
-
-	constructor(
-		ui: () => void,
-		editor: Editor,
-		node1: string, // active node
-		channel1: string, // current channel
-		node2: string, // new channel
-		channel2: string // node being displaced from new channel
-	) {
-		super();
-
-		this.ui = ui;
-		this.editor = editor;
-		this.channel1 = channel1;
-		this.channel2 = channel2;
-		this.node1 = node1;
-		this.node2 = node2;
-	}
-
-	undo() {
-		if (this.channel1) {
-			this.editor.assignNodeToTextureChannel(this.node1, this.channel1);
-		} else {
-			// node didnt have a channel to begin with
-			this.editor.clearTextureChannel(this.node1);
-		}
-
-		if (this.channel2 != null && this.node2 != null) {
-			// reset displaced node
-			this.editor.assignNodeToTextureChannel(this.node2, this.channel2);
-		}
-
-		if (this.ui) this.ui();
-	}
-
-	redo() {
-		if (this.channel2 == null) {
-			// clear channel
-			this.editor.clearTextureChannel(this.node1);
-		} else {
-			this.editor.assignNodeToTextureChannel(this.node1, this.channel2);
-		}
-
-		if (this.ui) this.ui();
-	}
-}
diff --git a/src/lib/actions/moveItemsaction.ts b/src/lib/actions/moveItemsaction.ts
deleted file mode 100644
index f8f4647b..00000000
--- a/src/lib/actions/moveItemsaction.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2 } from "../scene/view";
-
-export class MoveItemsAction extends Action {
-	items: GraphicsItem[];
-	oldPosList: Vector2[];
-	newPosList: Vector2[];
-
-	constructor(
-		items: GraphicsItem[],
-		oldPosList: Vector2[],
-		newPosList: Vector2[]
-	) {
-		super();
-
-		this.items = items;
-		this.oldPosList = oldPosList;
-		this.newPosList = newPosList;
-	}
-
-	undo() {
-		for (let i = 0; i < this.items.length; i++) {
-			const pos = this.oldPosList[i];
-			this.items[i].setPos(pos.x, pos.y);
-		}
-	}
-
-	redo() {
-		for (let i = 0; i < this.items.length; i++) {
-			const pos = this.newPosList[i];
-			this.items[i].setPos(pos.x, pos.y);
-		}
-	}
-}
diff --git a/src/lib/actions/propertychangeaction.ts b/src/lib/actions/propertychangeaction.ts
deleted file mode 100644
index 562bfb0e..00000000
--- a/src/lib/actions/propertychangeaction.ts
+++ /dev/null
@@ -1,44 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2, Rect } from "../scene/view";
-import { FrameGraphicsItem } from "../scene/framegraphicsitem";
-import { IPropertyHolder } from "../designer/properties";
-import { IProperyUi } from "@/components/properties/ipropertyui";
-import App from "@/App.vue";
-
-export class PropertyChangeAction extends Action {
-	ui: () => void;
-	propHolder: IPropertyHolder;
-	propName: string;
-	oldValue: any;
-	newValue: any;
-
-	constructor(
-		ui: () => void,
-		propName: string,
-		propHolder: IPropertyHolder,
-		oldValue: any,
-		newValue: any
-	) {
-		super();
-
-		this.ui = ui;
-		this.propName = propName;
-		this.propHolder = propHolder;
-		this.oldValue = oldValue;
-		this.newValue = newValue;
-	}
-
-	undo() {
-		this.propHolder.setProperty(this.propName, this.oldValue);
-		//App.instance.$refs.properties.$forceUpdate();
-		//this.ui.refresh();
-		if (this.ui) this.ui();
-	}
-
-	redo() {
-		this.propHolder.setProperty(this.propName, this.newValue);
-		//this.ui.refresh();
-		if (this.ui) this.ui();
-	}
-}
diff --git a/src/lib/actions/removeconnectionaction.ts b/src/lib/actions/removeconnectionaction.ts
deleted file mode 100644
index b22077b3..00000000
--- a/src/lib/actions/removeconnectionaction.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2 } from "../scene/view";
-import { ConnectionGraphicsItem } from "../scene/connectiongraphicsitem";
-import { NodeScene } from "../scene";
-
-export class RemoveConnectionAction extends Action {
-	scene: NodeScene;
-	con: ConnectionGraphicsItem;
-
-	constructor(scene: NodeScene, con: ConnectionGraphicsItem) {
-		super();
-
-		this.scene = scene;
-		this.con = con;
-	}
-
-	undo() {
-		this.scene.addConnection(this.con);
-	}
-
-	redo() {
-		this.scene.removeConnection(this.con);
-	}
-}
diff --git a/src/lib/actions/removeitemsaction.ts b/src/lib/actions/removeitemsaction.ts
deleted file mode 100644
index 39289729..00000000
--- a/src/lib/actions/removeitemsaction.ts
+++ /dev/null
@@ -1,125 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2 } from "../scene/view";
-import { ConnectionGraphicsItem } from "../scene/connectiongraphicsitem";
-import { NodeScene } from "../scene";
-import { FrameGraphicsItem } from "../scene/framegraphicsitem";
-import { CommentGraphicsItem } from "../scene/commentgraphicsitem";
-import { NodeGraphicsItem } from "../scene/nodegraphicsitem";
-import { NavigationGraphicsItem } from "../scene/navigationgraphicsitem";
-import { DesignerNode } from "../designer/designernode";
-import { Designer } from "../designer";
-import { Editor } from "../editor";
-
-// used when items are added to the scene
-// also used for paste events
-export class RemoveItemsAction extends Action {
-	editor: Editor;
-	scene: NodeScene;
-	designer: Designer;
-	frames: FrameGraphicsItem[];
-	comments: CommentGraphicsItem[];
-	navs: NavigationGraphicsItem[];
-	cons: ConnectionGraphicsItem[];
-	nodes: NodeGraphicsItem[];
-	dnodes: DesignerNode[];
-	textureChannels: Map<string, string>;
-
-	constructor(
-		editor: Editor,
-		scene: NodeScene,
-		designer: Designer,
-		frames: FrameGraphicsItem[],
-		comments: CommentGraphicsItem[],
-		navs: NavigationGraphicsItem[],
-		cons: ConnectionGraphicsItem[],
-		nodes: NodeGraphicsItem[],
-		dnodes: DesignerNode[]
-	) {
-		super();
-
-		this.editor = editor;
-		this.scene = scene;
-		this.designer = designer;
-		this.frames = frames;
-		this.comments = comments;
-		this.navs = navs;
-		this.cons = cons;
-		this.nodes = nodes;
-		this.dnodes = dnodes;
-
-		this.textureChannels = new Map<string, string>();
-
-		for (const node of nodes) {
-			if (node.textureChannel != null) {
-				this.textureChannels.set(node.id, node.textureChannel);
-			}
-		}
-	}
-
-	undo() {
-		for (const frame of this.frames) {
-			this.scene.addFrame(frame);
-		}
-
-		for (const comment of this.comments) {
-			this.scene.addComment(comment);
-		}
-
-		for (const nav of this.navs) {
-			this.scene.addNavigation(nav);
-		}
-
-		for (const node of this.nodes) {
-			this.scene.addNode(node);
-		}
-
-		for (const dnode of this.dnodes) {
-			this.designer.addNode(dnode, false);
-		}
-
-		// assign texture channels
-		for (const [nodeId, channel] of this.textureChannels) {
-			this.editor.assignNodeToTextureChannel(nodeId, channel);
-		}
-
-		// relying on callbacks to add the connection
-		// in designer
-		for (const con of this.cons) {
-			this.scene.addConnection(con);
-		}
-	}
-
-	redo() {
-		for (const frame of this.frames) {
-			this.scene.removeFrame(frame);
-		}
-
-		for (const comment of this.comments) {
-			this.scene.removeComment(comment);
-		}
-
-		for (const nav of this.navs) {
-			this.scene.removeNavigation(nav);
-		}
-
-		// for (let dnode of this.dnodes) {
-		// 	this.designer.addNode(dnode, false);
-		// }
-
-		// relying on callbacks to add the connection
-		// in designer
-		for (const con of this.cons) {
-			this.scene.removeConnection(con);
-		}
-
-		// also relying callbacks to have the node deleted in designer
-		// note: texture channel gets removed here if assigned
-		//       since texture channels are not assigned upon a node being
-		//		 added to a scene then there is no need to attempt to
-		//		 reassign any
-		for (const node of this.nodes) {
-			this.scene.deleteNode(node);
-		}
-	}
-}
diff --git a/src/lib/actions/resizeframeaction.ts b/src/lib/actions/resizeframeaction.ts
deleted file mode 100644
index fb880143..00000000
--- a/src/lib/actions/resizeframeaction.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2, Rect } from "../scene/view";
-import { FrameGraphicsItem } from "../scene/framegraphicsitem";
-
-export class ResizeFrameAction extends Action {
-	frame: FrameGraphicsItem;
-	oldRect: Rect;
-	newRect: Rect;
-
-	constructor(frame: FrameGraphicsItem, oldRect: Rect, newRect: Rect) {
-		super();
-
-		this.frame = frame;
-		this.oldRect = oldRect;
-		this.newRect = newRect;
-	}
-
-	undo() {
-		this.frame.setFrameRect(this.oldRect);
-	}
-
-	redo() {
-		this.frame.setFrameRect(this.newRect);
-	}
-}
diff --git a/src/lib/actions/setglobalrandomseedaction.ts b/src/lib/actions/setglobalrandomseedaction.ts
deleted file mode 100644
index 09395701..00000000
--- a/src/lib/actions/setglobalrandomseedaction.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2, Rect } from "../scene/view";
-import { FrameGraphicsItem } from "../scene/framegraphicsitem";
-import { Editor } from "../editor";
-import { IApp } from "@/iapp";
-
-export class SetGlobalRandomSeedAction extends Action {
-	editor: Editor;
-	oldSeed: number;
-	newSeed: number;
-	app: IApp;
-
-	constructor(app: IApp, editor: Editor, oldSeed: number, newSeed: number) {
-		super();
-
-		this.app = app;
-		this.editor = editor;
-		this.oldSeed = oldSeed;
-		this.newSeed = newSeed;
-	}
-
-	undo() {
-		this.app.randomSeed = this.oldSeed;
-		this.editor.designer.setRandomSeed(this.oldSeed);
-	}
-
-	redo() {
-		this.app.randomSeed = this.newSeed;
-		this.editor.designer.setRandomSeed(this.newSeed);
-	}
-}
diff --git a/src/lib/actions/setnoderandomseedaction.ts b/src/lib/actions/setnoderandomseedaction.ts
deleted file mode 100644
index c4762cf2..00000000
--- a/src/lib/actions/setnoderandomseedaction.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-import { Action } from "../undostack";
-import { DesignerNode } from "../designer/designernode";
-
-export class SetNodeRandomSeedAction extends Action {
-	ui: () => void;
-	node: DesignerNode;
-	oldSeed: number;
-	newSeed: number;
-
-	constructor(
-		ui: () => void,
-		node: DesignerNode,
-		oldSeed: number,
-		newSeed: number
-	) {
-		super();
-
-		this.ui = ui;
-		this.node = node;
-		this.oldSeed = oldSeed;
-		this.newSeed = newSeed;
-	}
-
-	undo() {
-		this.node.setRandomSeed(this.oldSeed);
-		if (this.ui) this.ui();
-	}
-
-	redo() {
-		this.node.setRandomSeed(this.newSeed);
-		if (this.ui) this.ui();
-	}
-}
diff --git a/src/lib/actions/switchconnectionaction.ts b/src/lib/actions/switchconnectionaction.ts
deleted file mode 100644
index b3b6c5ed..00000000
--- a/src/lib/actions/switchconnectionaction.ts
+++ /dev/null
@@ -1,52 +0,0 @@
-import { Action } from "../undostack";
-import { GraphicsItem } from "../scene/graphicsitem";
-import { Vector2 } from "../scene/view";
-import { ConnectionGraphicsItem } from "../scene/connectiongraphicsitem";
-import { NodeScene } from "../scene";
-
-export enum ConnectionSwitchAction {
-	Add = "add",
-	Remove = "delete"
-}
-
-export class SwitchConnectionAction extends Action {
-	scene: NodeScene;
-	cons: ConnectionGraphicsItem[];
-	actions: ConnectionSwitchAction[]; //'add' or 'remove'
-
-	constructor(
-		scene: NodeScene,
-		cons: ConnectionGraphicsItem[],
-		actions: ConnectionSwitchAction[]
-	) {
-		super();
-
-		this.scene = scene;
-		this.cons = cons;
-		this.actions = actions;
-	}
-
-	undo() {
-		for (let i = this.cons.length - 1; i >= 0; i--) {
-			if (this.actions[i] == ConnectionSwitchAction.Add) {
-				this.scene.removeConnection(this.cons[i]);
-			} else if (this.actions[i] == ConnectionSwitchAction.Remove) {
-				this.scene.addConnection(this.cons[i]);
-			} else {
-				throw "Invalid connection undo-redo action";
-			}
-		}
-	}
-
-	redo() {
-		for (let i = 0; i < this.cons.length; i++) {
-			if (this.actions[i] == ConnectionSwitchAction.Add) {
-				this.scene.addConnection(this.cons[i]);
-			} else if (this.actions[i] == ConnectionSwitchAction.Remove) {
-				this.scene.removeConnection(this.cons[i]);
-			} else {
-				throw "Invalid connection undo-redo action";
-			}
-		}
-	}
-}
diff --git a/src/lib/clipboard.ts b/src/lib/clipboard.ts
deleted file mode 100644
index 6903d9c2..00000000
--- a/src/lib/clipboard.ts
+++ /dev/null
@@ -1,357 +0,0 @@
-import { GraphicsItem } from "./scene/graphicsitem";
-import { NodeScene } from "./scene";
-import { DesignerLibrary } from "./designer/library";
-import { FrameGraphicsItem } from "./scene/framegraphicsitem";
-import { Color } from "./designer/color";
-import { CommentGraphicsItem } from "./scene/commentgraphicsitem";
-import { NavigationGraphicsItem } from "./scene/navigationgraphicsitem";
-import { Designer } from "./designer";
-import { DesignerNode } from "./designer/designernode";
-import { NodeGraphicsItem } from "./scene/nodegraphicsitem";
-import { DesignerNodeConn } from "./designer/designerconnection";
-import { SocketType } from "./scene/socketgraphicsitem";
-import { ConnectionGraphicsItem } from "./scene/connectiongraphicsitem";
-import { Guid } from "./utils";
-import { AddItemsAction } from "./actions/additemsaction";
-import { UndoStack } from "./undostack";
-import { Rect, Vector2 } from "./scene/view";
-
-export class ItemClipboard {
-	public static copyItems(
-		designer: Designer,
-		library: DesignerLibrary,
-		scene: NodeScene,
-		clipboard: DataTransfer
-	) {
-		clipboard.clearData();
-		const items = scene.selectedItems;
-		if (items.length == 0) {
-			// empty clipboard
-			clipboard.setData("text/nodes", "");
-		}
-
-		const data = {
-			nodes: [],
-			connections: [],
-			comments: [],
-			frames: [],
-			navigations: [],
-			libraryVersion: ""
-		};
-
-		// NODES AND CONNECTIONS
-		const nodeList: NodeGraphicsItem[] = [];
-		items.forEach(i => {
-			// check if this works with obfuscated code
-			if (i instanceof NodeGraphicsItem) nodeList.push(<NodeGraphicsItem>i);
-		});
-
-		data.nodes = this.getNodes(designer, nodeList);
-		data.connections = this.getConnections(data.nodes, designer, nodeList);
-
-		// FRAMES
-		const frames = [];
-		for (const item of items) {
-			if (!(item instanceof FrameGraphicsItem)) continue;
-			const frame = <FrameGraphicsItem>item;
-
-			const n: any = {};
-			n["x"] = frame.left;
-			n["y"] = frame.top;
-			n["width"] = frame.getWidth();
-			n["height"] = frame.getHeight();
-
-			n["title"] = frame.title;
-			n["showTitle"] = frame.showTitle;
-			n["description"] = frame.description;
-			n["color"] = frame.color.toHex();
-
-			frames.push(n);
-		}
-		data.frames = frames;
-
-		// COMMENTS
-		const comments = [];
-		for (const item of items) {
-			if (!(item instanceof CommentGraphicsItem)) continue;
-			const comment = <CommentGraphicsItem>item;
-
-			const n: any = {};
-			n["x"] = comment.left;
-			n["y"] = comment.top;
-
-			n["text"] = comment.text;
-			n["color"] = comment.color.toHex();
-
-			comments.push(n);
-		}
-		data.comments = comments;
-
-		// NAVIGATIONS
-		const navs = [];
-		for (const item of items) {
-			if (!(item instanceof NavigationGraphicsItem)) continue;
-			const nav = <NavigationGraphicsItem>item;
-
-			const n: any = {};
-			n["x"] = nav.left;
-			n["y"] = nav.top;
-
-			navs.push(n);
-		}
-		data.navigations = navs;
-
-		// let data = scene.save(); // do to items
-		data.libraryVersion = library.getVersionName();
-
-		const json = JSON.stringify(data);
-
-		clipboard.setData("json/nodes", json);
-	}
-
-	public static pasteItems(
-		designer: Designer,
-		library: DesignerLibrary,
-		scene: NodeScene,
-		clipboard: DataTransfer
-	) {
-		const json = clipboard.getData("json/nodes");
-		//console.log(json);
-		if (json == null || json == "") return;
-
-		const data = JSON.parse(json);
-		if (!data) return;
-
-		const frames: FrameGraphicsItem[] = [];
-		const comments: CommentGraphicsItem[] = [];
-		const navs: NavigationGraphicsItem[] = [];
-		const cons: ConnectionGraphicsItem[] = [];
-		const nodes: NodeGraphicsItem[] = [];
-		const dnodes: DesignerNode[] = [];
-
-		// for selecting pasted items
-		const focusItems: GraphicsItem[] = [];
-
-		// FRAMES
-		if (data.frames) {
-			for (const d of data.frames) {
-				const frame = new FrameGraphicsItem(scene.view);
-				frame.setPos(d.x, d.y);
-				frame.setSize(d.width, d.height);
-
-				frame.setTitle(d.title);
-				frame.setShowTitle(d.showTitle);
-				frame.setDescription(d.description);
-				frame.color = Color.parse(d.color);
-
-				scene.addFrame(frame);
-				frames.push(frame);
-				focusItems.push(frame);
-			}
-		}
-
-		// COMMENTS
-		if (data.comments) {
-			for (const d of data.comments) {
-				const comment = new CommentGraphicsItem(scene.view);
-				comment.setPos(d.x, d.y);
-				comment.setText(d.text);
-				comment.color = Color.parse(d.color);
-
-				scene.addComment(comment);
-				comments.push(comment);
-				focusItems.push(comment);
-			}
-		}
-
-		// NAVIGATION
-		if (data.navigations) {
-			for (const d of data.navigations) {
-				const nav = new NavigationGraphicsItem();
-				nav.setPos(d.x, d.y);
-				scene.addNavigation(nav);
-				navs.push(nav);
-				focusItems.push(nav);
-			}
-		}
-
-		//NODES AND CONNECTIONS
-
-		// old : new
-		const nodeIdMap = {};
-		// add them to designer then add them to scene
-		for (const n of data.nodes) {
-			const dNode = library.create(n.typeName);
-
-			// add to designer
-			designer.addNode(dNode);
-			nodeIdMap[n.id] = dNode.id;
-
-			// assign properties
-			for (const propName in n.properties) {
-				dNode.setProperty(propName, n.properties[propName]);
-			}
-
-			// create scene version
-			const node = new NodeGraphicsItem(dNode.title);
-			for (const input of dNode.getInputs()) {
-				node.addSocket(input, input, SocketType.In);
-			}
-			node.addSocket("output", "output", SocketType.Out);
-			node.id = dNode.id;
-			scene.addNode(node);
-			focusItems.push(node);
-
-			// generate thumbnail
-			const thumb = designer.generateImageFromNode(dNode);
-			node.setThumbnail(thumb);
-
-			node.setCenter(n.x, n.y);
-
-			nodes.push(node);
-			dnodes.push(dNode);
-		}
-		// console.log(nodeIdMap);
-
-		// console.log(scene.nodes);
-
-		// add connections
-		for (const c of data.connections) {
-			// map to ids of new nodes
-			const leftId = nodeIdMap[c.leftNodeId];
-			const rightId = nodeIdMap[c.rightNodeId];
-
-			// create connection
-			const con = new ConnectionGraphicsItem();
-			con.id = Guid.newGuid(); // brand new connection
-
-			// get nodes
-			const leftNode = scene.getNodeById(leftId);
-			const rightNode = scene.getNodeById(rightId);
-
-			// get sockets
-			con.socketA = leftNode.getOutSocketByName(c.leftNodeOutput);
-			con.socketB = rightNode.getInSocketByName(c.rightNodeInput);
-
-			// callback triggers the creation in designer
-			scene.addConnection(con);
-
-			cons.push(con);
-		}
-
-		if (
-			frames.length != 0 ||
-			comments.length != 0 ||
-			navs.length != 0 ||
-			cons.length != 0 ||
-			nodes.length != 0 ||
-			dnodes.length != 0
-		) {
-			// gather bounding box and center items to screen
-			if (focusItems.length > 0) {
-				const rect = this.getItemsBounds(focusItems);
-				const center = scene.view.sceneCenter;
-
-				// find diff, then offset each object by that diff
-				//let diff = Vector2.subtract(center, rect.center);
-				for (const item of focusItems) {
-					const offsetFromRect = Vector2.subtract(item.getPos(), rect.center);
-					const newPos = Vector2.add(center, offsetFromRect);
-					item.setPos(newPos.x, newPos.y);
-					//item.move(diff.x, diff.y);
-				}
-			}
-
-			// add undo-redo
-			const action = new AddItemsAction(
-				scene,
-				designer,
-				frames,
-				comments,
-				navs,
-				cons,
-				nodes,
-				dnodes
-			);
-			UndoStack.current.push(action);
-
-			// make items selected
-			scene.setSelectedItems(focusItems, true);
-		}
-	}
-
-	// merge designer and scene node in one
-	// scene node only has x and y values
-	static getNodes(
-		designer: Designer,
-		items: NodeGraphicsItem[]
-	): Array<object> {
-		const dnodes = [];
-		items.forEach(i => {
-			const node = designer.getNodeById(i.id);
-
-			const n = {};
-			n["id"] = node.id;
-			n["typeName"] = node.typeName;
-			n["exportName"] = node.exportName;
-			//n["inputs"] = node.inputs;// not needed imo
-
-			const props = {};
-			for (const prop of node.properties) {
-				props[prop.name] = prop.getValue();
-			}
-			n["properties"] = props;
-
-			n["x"] = i.centerX();
-			n["y"] = i.centerY();
-
-			dnodes.push(n);
-		});
-
-		return dnodes;
-	}
-
-	static getConnections(
-		nodeList: Array<object>,
-		designer: Designer,
-		items: NodeGraphicsItem[]
-	): Array<object> {
-		const conns = [];
-
-		// we're searching for connections with both left and right socket
-		// in our selection pool
-		designer.conns.forEach(con => {
-			if (
-				ItemClipboard.getNodeById(con.leftNode.id, nodeList) &&
-				ItemClipboard.getNodeById(con.rightNode.id, nodeList)
-			) {
-				const c = {};
-				c["id"] = con.id;
-				c["leftNodeId"] = con.leftNode.id;
-				c["leftNodeOutput"] = con.leftNodeOutput;
-				c["rightNodeId"] = con.rightNode.id;
-				c["rightNodeInput"] = con.rightNodeInput;
-
-				conns.push(c);
-			}
-		});
-
-		return conns;
-	}
-
-	static getNodeById(id: string, nodeList: Array<object>): object {
-		for (const node of nodeList) if (node["id"] == id) return node;
-
-		return null;
-	}
-
-	static getItemsBounds(items: GraphicsItem[]): Rect {
-		const rect: Rect = items[0].getRect();
-		for (const item of items) {
-			const r = item.getRect();
-			rect.expandByRect(r);
-		}
-
-		return rect;
-	}
-}
diff --git a/src/lib/designer.ts b/src/lib/designer.ts
deleted file mode 100644
index 6d6cbd37..00000000
--- a/src/lib/designer.ts
+++ /dev/null
@@ -1,945 +0,0 @@
-import { DesignerNode, NodeInput } from "./designer/designernode";
-import { DesignerNodeConn } from "./designer/designerconnection";
-import { DesignerLibrary } from "./designer/library";
-import { Guid } from "./utils";
-import { ImageCanvas } from "./designer/imagecanvas";
-import { Image } from "./designer/image";
-import { buildShaderProgram } from "./designer/gl";
-import {
-	IntProperty,
-	FloatProperty,
-	BoolProperty,
-	EnumProperty,
-	ColorProperty,
-	Property,
-	PropertyType
-} from "./designer/properties";
-import { Color } from "./designer/color";
-import {
-	DesignerVariable,
-	DesignerVariableType,
-	DesignerNodePropertyMap
-} from "./designer/designervariable";
-
-export class NodeRenderContext {
-	canvas: HTMLCanvasElement;
-	gl: WebGLRenderingContext;
-	fbo: WebGLFramebuffer;
-	inputs: NodeInput[];
-
-	textureWidth: number;
-	textureHeight: number;
-
-	randomSeed: number;
-}
-
-// keeps track of query object that tracks
-// node's processing time
-// https://www.khronos.org/registry/webgl/extensions/EXT_disjoint_timer_query_webgl2/
-export class NodeRenderTimer {
-	query: WebGLQuery;
-	ms: number;
-	node: DesignerNode;
-}
-
-export enum UpdateMode {
-	Immediate = "immediate",
-	Staggered = "staggered"
-}
-
-export class Designer {
-	canvas: HTMLCanvasElement;
-	gl: WebGL2RenderingContext;
-	public texCoordBuffer: WebGLBuffer;
-	public posBuffer: WebGLBuffer;
-	vertexShaderSource: string;
-	fbo: WebGLFramebuffer;
-	thumbnailProgram: WebGLProgram;
-
-	updateMode: UpdateMode;
-
-	randomSeed: number;
-	width: number;
-	height: number;
-
-	nodes: DesignerNode[];
-	conns: DesignerNodeConn[];
-
-	// list of nodes yet to be designed
-	updateList: DesignerNode[];
-
-	library: DesignerLibrary;
-
-	//variables
-	variables: DesignerVariable[];
-
-	renderContext: NodeRenderContext;
-
-	renderTimers: NodeRenderTimer[];
-	queryExt: any;
-
-	// callbacks
-	onthumbnailgenerated: (DesignerNode, HTMLImageElement) => void;
-
-	// called everytime a node's texture gets updated
-	// listeners can use this update their CanvasTextures
-	// by rendering the node's texture with renderNodeTextureToCanvas(node, imageCanvas)
-	onnodetextureupdated: (DesignerNode, number) => void;
-
-	onnodetimeupdated: (DesignerNode, number) => void;
-
-	public constructor() {
-		this.width = 1024;
-		this.height = 1024;
-		this.randomSeed = 32;
-
-		this.updateMode = UpdateMode.Staggered;
-
-		this.canvas = <HTMLCanvasElement>document.createElement("canvas");
-		//document.body.appendChild(this.canvas);
-		this.canvas.width = this.width;
-		this.canvas.height = this.height;
-		this.gl = this.canvas.getContext("webgl2");
-
-		let result = this.gl.getExtension("EXT_disjoint_timer_query_webgl2");
-		if (result) console.log("TIMER QUERY SUPPORTED", result);
-		else console.log("TIMER QUERY NOT SUPPORTED", result);
-		this.queryExt = result;
-
-		// floating point textures
-		result = this.gl.getExtension("EXT_color_buffer_float");
-		if (!result) console.log("COLOR BUFFER FLOAT NOT SUPPORTED", result);
-
-		result = this.gl.getExtension("OES_texture_float_linear");
-		if (!result) console.log("TEXTURE FLOAT LINEAR NOT SUPPORTED", result);
-
-		result = this.gl.getExtension("EXT_texture_norm16");
-		if (!result) console.log("TEXTURE NORM16 NOT SUPPORTED", result);
-
-		this.renderContext = new NodeRenderContext();
-
-		this.nodes = [];
-		this.conns = [];
-
-		this.updateList = [];
-		this.variables = [];
-
-		this.renderTimers = [];
-
-		this.init();
-	}
-
-	// evaludate rendertimers
-	// discards ones that arent ready
-	// this function should be called at the beginning
-	// of a render cycle
-	public calculateNodeProcessingTimes(): NodeRenderTimer[] {
-		const gl = this.gl;
-
-		let completeTimers: NodeRenderTimer[] = [];
-		for (let timer of this.renderTimers) {
-			var available = gl.getQueryParameter(
-				timer.query,
-				gl.QUERY_RESULT_AVAILABLE
-			);
-			var disjoint = gl.getParameter(this.queryExt.GPU_DISJOINT_EXT as GLenum);
-
-			if (available && !disjoint) {
-				// See how much time the rendering of the object took in nanoseconds.
-				var timeElapsed = gl.getQueryParameter(timer.query, gl.QUERY_RESULT);
-				timer.ms = timeElapsed / (1000 * 1000);
-				completeTimers.push(timer);
-			}
-		}
-
-		// decided not to empty this each frame since some operations might
-		// take long, however, something should be done so that dangling
-		// timers dont stay in the list
-		//this.renderTimers = [];
-
-		return completeTimers;
-	}
-
-	public setTextureSize(width: number, height: number) {
-		//todo: is resizing the canvas even necessary?
-		this.width = width;
-		this.height = height;
-		this.canvas.width = this.width;
-		this.canvas.height = this.height;
-
-		for (const node of this.nodes) {
-			node.createTexture();
-			this.requestUpdate(node);
-		}
-	}
-
-	public randomizeSeed() {
-		this.setRandomSeed(Math.floor(Math.random() * 256));
-	}
-
-	public setRandomSeed(newSeed: number) {
-		this.randomSeed = newSeed;
-		// invalidate all nodes
-		this.invalidateAllNodes();
-	}
-
-	public getRandomSeed(): number {
-		return this.randomSeed;
-	}
-
-	init() {
-		this.createVertexBuffers();
-		this.createFBO();
-		this.createThumbmailProgram();
-	}
-
-	updateImmediate() {
-		this.updateRenderTimers();
-
-		let updateQuota = 10000000000000;
-		// fetch random node from update list (having all in sockets that have been updated) and update it
-		// todo: do only on per update loop
-		while (this.updateList.length != 0) {
-			for (const node of this.updateList) {
-				if (this.haveAllUpdatedLeftNodes(node)) {
-					// update this node's texture and thumbnail
-
-					// remove from list
-					this.updateList.splice(this.updateList.indexOf(node), 1);
-
-					// a note about this:
-					// technically all the subsequent nodes should be updated here, so this.updateList
-					// wont be touched in this function
-					// so we avoid messing up our loop since the length of this.updateList wont change
-					this.generateImageFromNode(node);
-
-					node.needsUpdate = false;
-					//break;// one per update loop
-
-					updateQuota--;
-					if (updateQuota < 0) break;
-				}
-			}
-		}
-	}
-
-	updateStaggered() {
-		this.updateRenderTimers();
-
-		const batch: DesignerNode[] = [];
-
-		for (const node of this.updateList) {
-			if (this.haveAllUpdatedLeftNodes(node)) {
-				batch.push(node);
-			}
-		}
-
-		for (const node of batch) {
-			// remove from list
-			batch.splice(batch.indexOf(node), 1);
-			this.updateList.splice(this.updateList.indexOf(node), 1);
-
-			this.generateImageFromNode(node, false);
-
-			node.needsUpdate = false;
-		}
-	}
-
-	get processedNodes() {
-		return this.nodes.length - this.updateList.length;
-	}
-
-	get totalNodes() {
-		return this.nodes.length;
-	}
-
-	setUpdateMode(updateMode: UpdateMode) {
-		this.updateMode = updateMode;
-	}
-
-	update() {
-		if (this.updateMode == UpdateMode.Immediate) this.updateImmediate();
-		else this.updateStaggered();
-	}
-
-	updateRenderTimers() {
-		if (!this.onnodetimeupdated) return;
-
-		let timers = this.calculateNodeProcessingTimes();
-		for (let timer of timers) {
-			this.onnodetimeupdated(timer.node, timer.ms);
-		}
-	}
-
-	// checks if all input nodes have needsUpdate set to false
-	haveAllUpdatedLeftNodes(node: DesignerNode): boolean {
-		for (const con of this.conns) {
-			// get connections to this node
-			if (con.rightNode == node) {
-				if (con.leftNode.needsUpdate == true) {
-					// found a node that needs update itself
-					return false;
-				}
-			}
-		}
-
-		return true;
-	}
-
-	// adds node to update list
-	// add subsequent (output) nodes in tree to update list a well, recursively
-	requestUpdate(node: DesignerNode) {
-		if (this.updateList.indexOf(node) == -1) {
-			// not yet in the list, add to list and add dependent nodes
-			node.needsUpdate = true; // just in case...
-			this.updateList.push(node);
-		}
-
-		// add all right connections
-		for (const con of this.conns) {
-			if (con.leftNode == node) {
-				this.requestUpdate(con.rightNode);
-			}
-		}
-	}
-
-	public invalidateAllNodes() {
-		for (const node of this.nodes) {
-			this.requestUpdate(node);
-		}
-	}
-
-	setLibrary(lib: DesignerLibrary) {
-		this.library = lib;
-	}
-
-	// creates node and adds it to scene
-	createNode(name: string): DesignerNode {
-		const node = this.library.create(name);
-
-		this.addNode(node);
-		return node;
-	}
-
-	createFBO() {
-		const gl = this.gl;
-
-		this.fbo = gl.createFramebuffer();
-
-		// gotta create at least a renderbuffer
-	}
-
-	createVertexBuffers() {
-		const gl = this.gl;
-		//var texCoordLocation = gl.getAttribLocation(program, "a_texCoord");
-
-		// provide texture coordinates for the rectangle.
-		this.texCoordBuffer = gl.createBuffer();
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.texCoordBuffer);
-		gl.bufferData(
-			gl.ARRAY_BUFFER,
-			new Float32Array([
-				0.0,
-				0.0,
-				1.0,
-				0.0,
-				0.0,
-				1.0,
-				0.0,
-				1.0,
-				1.0,
-				0.0,
-				1.0,
-				1.0
-			]),
-			gl.STATIC_DRAW
-		);
-		//gl.enableVertexAttribArray(texCoordLocation);
-		//gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
-
-		this.posBuffer = gl.createBuffer();
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.posBuffer);
-		gl.bufferData(
-			gl.ARRAY_BUFFER,
-			new Float32Array([
-				-1.0,
-				-1.0,
-				0.0,
-				1.0,
-				-1.0,
-				0.0,
-				-1.0,
-				1.0,
-				0.0,
-				-1.0,
-				1.0,
-				0.0,
-				1.0,
-				-1.0,
-				0.0,
-				1.0,
-				1.0,
-				0.0
-			]),
-			gl.STATIC_DRAW
-		);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, null);
-	}
-
-	// adds node to scene
-	// adds it to this.updateList
-	// if `init` is set to false, node will not be initialized
-	// useful for undo-redo where node is re-added
-	addNode(node: DesignerNode, init = true) {
-		this.nodes.push(node);
-		if (init) {
-			node.gl = this.gl;
-			node.designer = this;
-			node._init();
-		}
-		this.requestUpdate(node);
-	}
-
-	getNodeById(nodeId: string): DesignerNode {
-		for (const node of this.nodes) {
-			if (node.id == nodeId) return node;
-		}
-		return null;
-	}
-
-	addConnection(
-		leftNode: DesignerNode,
-		rightNode: DesignerNode,
-		rightIndex: string
-	) {
-		const con = new DesignerNodeConn();
-		con.leftNode = leftNode;
-
-		con.rightNode = rightNode;
-		con.rightNodeInput = rightIndex;
-
-		this.conns.push(con);
-
-		// right node needs to be updated
-		this.requestUpdate(rightNode);
-
-		return con;
-	}
-
-	removeConnection(
-		leftNode: DesignerNode,
-		rightNode: DesignerNode,
-		rightIndex: string
-	) {
-		for (const con of this.conns) {
-			if (
-				con.leftNode == leftNode &&
-				con.rightNode == rightNode &&
-				con.rightNodeInput == rightIndex
-			) {
-				// right node needs to be updated
-				this.requestUpdate(rightNode);
-
-				// found our connection, remove
-				this.conns.splice(this.conns.indexOf(con), 1);
-				//console.log("removed connection in designer");
-				//console.log(con);
-
-				return con;
-			}
-		}
-
-		return null;
-	}
-
-	// todo: double check connections just in case
-	removeNode(nodeId: string): DesignerNode {
-		const node = this.getNodeById(nodeId);
-		if (!node) {
-			return null;
-		}
-
-		this.nodes.splice(this.nodes.indexOf(node), 1);
-
-		// it's safe here to pluck this node right out of the update queue
-		// the connections would have been already removed, triggering
-		// updates for the previously neighbor nodes already
-		while (this.updateList.indexOf(node) !== -1)
-			this.updateList.splice(this.updateList.indexOf(node), 1);
-	}
-
-	generateImage(name: string): HTMLImageElement {
-		const node: DesignerNode = this.getNodeByName(name);
-		return this.generateImageFromNode(node);
-	}
-
-	// this function generates the image of the node given its input nodes
-	// if the input nodes arent updated then it will update them
-	// for every node updated in this function, it emits onthumbnailgenerated(node, thumbnail)
-	// it returns a thumbnail (an html image)
-
-	generateImageFromNode(
-		node: DesignerNode,
-		processInputs: boolean = true
-	): HTMLImageElement {
-		const inputs: NodeInput[] = this.getNodeInputs(node);
-
-		if (processInputs) {
-			// process input nodes
-			for (const input of inputs) {
-				if (input.node.needsUpdate) {
-					this.generateImageFromNode(input.node);
-
-					// remove from update list since thumbnail has now been generated
-					input.node.needsUpdate = false;
-					this.updateList.splice(this.updateList.indexOf(input.node), 1);
-				}
-			}
-		}
-
-		const gl = this.gl;
-
-		let context = this.renderContext;
-		context.gl = gl;
-		context.canvas = this.canvas;
-		context.inputs = inputs;
-		context.randomSeed = this.randomSeed;
-		context.fbo = this.fbo;
-		context.textureWidth = this.width;
-		context.textureHeight = this.height;
-
-		let dtInMs = 0;
-		if (node.isCpu()) {
-			let startTime = Date.now();
-
-			node.render(context);
-
-			let endTime = Date.now();
-			dtInMs = endTime - startTime;
-		} else {
-			let query = gl.createQuery();
-			gl.beginQuery(this.queryExt.TIME_ELAPSED_EXT, query);
-
-			node.render(context);
-			gl.endQuery(this.queryExt.TIME_ELAPSED_EXT);
-
-			// create timer
-			let timer = new NodeRenderTimer();
-			timer.node = node;
-			timer.query = query;
-			timer.ms = 0;
-
-			this.renderTimers.push(timer);
-
-			dtInMs = -1;
-		}
-
-		if (this.onnodetextureupdated) {
-			this.onnodetextureupdated(node, dtInMs);
-		}
-
-		const thumb = this.generateThumbnailFromNode(node);
-		if (this.onthumbnailgenerated) {
-			this.onthumbnailgenerated(node, thumb);
-		}
-
-		return thumb;
-	}
-
-	// renders node's texture to an image object
-	// ensure the node is updated before calling this function
-	// this function doesnt try to update child nodes
-	generateThumbnailFromNode(node: DesignerNode) {
-		const gl = this.gl;
-
-		gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
-
-		// bind shader
-		gl.useProgram(this.thumbnailProgram);
-
-		// bind mesh
-		const posLoc = gl.getAttribLocation(this.thumbnailProgram, "a_pos");
-		const texCoordLoc = gl.getAttribLocation(
-			this.thumbnailProgram,
-			"a_texCoord"
-		);
-
-		// provide texture coordinates for the rectangle.
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.posBuffer);
-		gl.enableVertexAttribArray(posLoc);
-		gl.vertexAttribPointer(posLoc, 3, gl.FLOAT, false, 0, 0);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.texCoordBuffer);
-		gl.enableVertexAttribArray(texCoordLoc);
-		gl.vertexAttribPointer(texCoordLoc, 2, gl.FLOAT, false, 0, 0);
-
-		// send texture
-		gl.uniform1i(gl.getUniformLocation(this.thumbnailProgram, "tex"), 0);
-		gl.activeTexture(gl.TEXTURE0);
-		gl.bindTexture(gl.TEXTURE_2D, node.tex);
-
-		gl.drawArrays(gl.TRIANGLES, 0, 6);
-
-		// cleanup
-		gl.disableVertexAttribArray(posLoc);
-		gl.disableVertexAttribArray(texCoordLoc);
-
-		//var img:HTMLImageElement = <HTMLImageElement>document.createElement("image");
-		//var img:HTMLImageElement = new Image(this.width, this.height);
-		//img.src = this.canvas.toDataURL("image/png");
-
-		// note: this called right after clears the image for some reason
-		//gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
-		//return img;
-		return null;
-	}
-
-	// render's node's texture then draws it on the given canvas
-	// used as an alternative to move textures since toDataUrl is
-	// so computationally expensive
-	copyNodeTextureToImageCanvas(node: DesignerNode, canvas: ImageCanvas) {
-		const gl = this.gl;
-
-		gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
-
-		// bind shader
-		gl.useProgram(this.thumbnailProgram);
-
-		// bind mesh
-		const posLoc = gl.getAttribLocation(this.thumbnailProgram, "a_pos");
-		const texCoordLoc = gl.getAttribLocation(
-			this.thumbnailProgram,
-			"a_texCoord"
-		);
-
-		// provide texture coordinates for the rectangle.
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.posBuffer);
-		gl.enableVertexAttribArray(posLoc);
-		gl.vertexAttribPointer(posLoc, 3, gl.FLOAT, false, 0, 0);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.texCoordBuffer);
-		gl.enableVertexAttribArray(texCoordLoc);
-		gl.vertexAttribPointer(texCoordLoc, 2, gl.FLOAT, false, 0, 0);
-
-		// send texture
-		gl.uniform1i(gl.getUniformLocation(this.thumbnailProgram, "tex"), 0);
-		gl.activeTexture(gl.TEXTURE0);
-		gl.bindTexture(gl.TEXTURE_2D, node.tex);
-
-		gl.drawArrays(gl.TRIANGLES, 0, 6);
-
-		// cleanup
-		gl.disableVertexAttribArray(posLoc);
-		gl.disableVertexAttribArray(texCoordLoc);
-
-		// force rendering to be complete
-		//gl.flush();
-
-		canvas.copyFromCanvas(this.canvas, true);
-	}
-
-	createThumbmailProgram() {
-		const prog = buildShaderProgram(
-			this.gl,
-			`precision mediump float;
-
-        attribute vec3 a_pos;
-        attribute vec2 a_texCoord;
-            
-        // the texCoords passed in from the vertex shader.
-        varying vec2 v_texCoord;
-            
-        void main() {
-            gl_Position = vec4(a_pos,1.0);
-            v_texCoord = a_texCoord;
-        }`,
-			`precision mediump float;
-        varying vec2 v_texCoord;
-        uniform sampler2D tex;
-
-        vec4 process(vec2 uv);
-        
-        void main() {
-            gl_FragColor = texture2D(tex,v_texCoord);
-        }`
-		);
-
-		this.thumbnailProgram = prog;
-	}
-
-	getNodeByName(exportName: string): DesignerNode {
-		for (const node of this.nodes) {
-			if (node.exportName == exportName) return node;
-		}
-
-		return null;
-	}
-
-	getNodeInputs(node: DesignerNode): NodeInput[] {
-		const inputs: NodeInput[] = [];
-
-		for (const con of this.conns) {
-			if (con.rightNode == node) {
-				const input = new NodeInput();
-				input.name = con.rightNodeInput;
-				input.node = con.leftNode;
-				inputs.push(input);
-			}
-		}
-
-		return inputs;
-	}
-
-	public addVariable(
-		name: string,
-		displayName: string,
-		varType: DesignerVariableType
-	): DesignerVariable {
-		//todo: throw exception if variable already exists?
-
-		const variable = new DesignerVariable();
-		variable.type = varType;
-		variable.id = Guid.newGuid();
-
-		switch (varType) {
-			case DesignerVariableType.Int:
-				variable.property = new IntProperty(name, displayName, 0);
-				break;
-			case DesignerVariableType.Float:
-				variable.property = new FloatProperty(name, displayName, 0);
-				break;
-			case DesignerVariableType.Bool:
-				variable.property = new BoolProperty(name, displayName, false);
-				break;
-			case DesignerVariableType.Enum:
-				variable.property = new EnumProperty(name, displayName, []);
-				break;
-			case DesignerVariableType.Color:
-				variable.property = new ColorProperty(name, displayName, new Color());
-				break;
-		}
-
-		this.variables.push(variable);
-		return variable;
-	}
-
-	// todo: keep reference inside node's property
-	public mapNodePropertyToVariable(
-		varName: string,
-		node: DesignerNode,
-		nodePropName: string
-	) {
-		const variable = this.findVariable(varName);
-		if (variable == null) return; //todo: throw exception?
-
-		const map = new DesignerNodePropertyMap();
-		map.node = node;
-		map.propertyName = nodePropName;
-
-		variable.nodes.push(map);
-	}
-
-	//todo: remove property map
-
-	public setVariable(name: string, value: any) {
-		const variable = this.findVariable(name);
-		if (variable) {
-			//todo: throw exception for invalid types being set
-			variable.property.setValue(value);
-
-			//update each node's variables
-			for (const nodeMap of variable.nodes) {
-				//if (nodeMap.node.hasProperty(nodeMap.propertyName))// just incase
-				nodeMap.node.setProperty(nodeMap.propertyName, value);
-			}
-		} else {
-			// throw exception?
-		}
-	}
-
-	public findVariable(name: string) {
-		for (const variable of this.variables)
-			if (variable.property.name == name) return variable;
-		return null;
-	}
-
-	public hasVariable(name: string): boolean {
-		for (const variable of this.variables)
-			if (variable.property.name == name) return true;
-		return false;
-	}
-
-	public variableCount(): number {
-		return this.variables.length;
-	}
-
-	public save(): any {
-		const nodes = [];
-		for (const node of this.nodes) {
-			const n = {};
-			n["id"] = node.id;
-			n["typeName"] = node.typeName;
-			n["exportName"] = node.exportName;
-
-			n["randomSeed"] = node.randomSeed;
-			//n["inputs"] = node.inputs;// not needed imo
-
-			const props = {};
-			for (const prop of node.properties) {
-				if (prop.type == PropertyType.Image) {
-					// serialize texture as png
-					let imageData = (prop.getValue() as Image).serialize();
-					props[prop.name] = imageData;
-				} else {
-					props[prop.name] = prop.getValue();
-				}
-			}
-			n["properties"] = props;
-
-			nodes.push(n);
-		}
-
-		const connections = [];
-		for (const con of this.conns) {
-			const c = {};
-			c["id"] = con.id;
-			c["leftNodeId"] = con.leftNode.id;
-			c["leftNodeOutput"] = con.leftNodeOutput;
-			c["rightNodeId"] = con.rightNode.id;
-			c["rightNodeInput"] = con.rightNodeInput;
-
-			connections.push(c);
-		}
-
-		const variables = [];
-		for (const dvar of this.variables) {
-			const v = {};
-			v["id"] = dvar.id;
-			v["type"] = dvar.type;
-			v["property"] = dvar.property;
-
-			const nodeIds = [];
-			for (const n of dvar.nodes) {
-				nodeIds.push({
-					nodeId: n.node.id,
-					name: n.propertyName
-				});
-			}
-			v["linkedProperties"] = nodeIds;
-			variables.push(v);
-			// console.log(v);
-		}
-
-		const data = {};
-		data["nodes"] = nodes;
-		data["connections"] = connections;
-		data["variables"] = variables;
-		return data;
-	}
-
-	static load(data: any, lib: DesignerLibrary): Designer {
-		// console.log(data);
-		const d = new Designer();
-		const nodes = data["nodes"];
-		for (const node of nodes) {
-			const n = lib.create(node["typeName"]);
-			n.exportName = node["exportName"];
-			n.id = node["id"];
-
-			n.randomSeed = node["randomSeed"] || 0;
-
-			// add node to it's properties will be initialized
-			// todo: separate setting properties and inputs from setting shader in node
-			d.addNode(n);
-
-			// add properties
-			const properties = node["properties"];
-			for (const prop in properties) {
-				n.setProperty(prop, properties[prop]);
-			}
-		}
-
-		const connections = data["connections"];
-		for (const con of connections) {
-			//var c = d.addConnection()
-			const left = d.getNodeById(con.leftNodeId);
-			const right = d.getNodeById(con.rightNodeId);
-
-			// todo: support left index
-			d.addConnection(left, right, con.rightNodeInput);
-		}
-		/*
-        for(let dvar of this.variables) {
-            var v = {};
-            v["id"] = dvar.id;
-            v["type"] = dvar.type;
-            v["property"] = dvar.property;
-
-            var nodeIds = new Array();
-            for(let n of dvar.nodes) {
-                nodeIds.push({
-                    nodeId:n.node.id,
-                    name:n.propertyName
-                });
-            }
-            v["linkedProperties"] = nodeIds;
-            variables.push(v);
-            console.log(v);
-        }
-        */
-		if (data.variables) {
-			const variables = <DesignerVariable[]>data.variables;
-			for (const v of variables) {
-				//this.addVariable(v.name, v.displayName, )
-
-				const dvar = d.addVariable(
-					v.property.name,
-					v.property.displayName,
-					v.type
-				);
-				dvar.id = v.id;
-				// copy values over to the property
-				switch (dvar.type) {
-					case DesignerVariableType.Float:
-						(<FloatProperty>dvar.property).copyValuesFrom(
-							<FloatProperty>v.property
-						);
-						break;
-
-					case DesignerVariableType.Int:
-						(<IntProperty>dvar.property).copyValuesFrom(
-							<IntProperty>v.property
-						);
-						break;
-
-					case DesignerVariableType.Bool:
-						(<BoolProperty>dvar.property).copyValuesFrom(
-							<BoolProperty>v.property
-						);
-						break;
-
-					case DesignerVariableType.Enum:
-						(<EnumProperty>dvar.property).copyValuesFrom(
-							<EnumProperty>v.property
-						);
-						break;
-
-					case DesignerVariableType.Color:
-						(<ColorProperty>dvar.property).copyValuesFrom(
-							<ColorProperty>v.property
-						);
-						break;
-				}
-
-				// link properties
-				for (const lp of (<any>v).linkedProperties) {
-					const node = d.getNodeById(lp.nodeId);
-					d.mapNodePropertyToVariable(v.property.name, node, lp.name);
-				}
-			}
-		}
-
-		return d;
-	}
-}
diff --git a/src/lib/designer/color.ts b/src/lib/designer/color.ts
deleted file mode 100644
index 8b3a1c21..00000000
--- a/src/lib/designer/color.ts
+++ /dev/null
@@ -1,52 +0,0 @@
-// values range from 0 to 1
-export class Color {
-	public r = 0.0;
-	public g = 0.0;
-	public b = 0.0;
-	public a = 1.0;
-
-	public constructor(r = 0.0, g = 0.0, b = 0.0, a = 1.0) {
-		this.r = r;
-		this.g = g;
-		this.b = b;
-		this.a = a;
-	}
-	public clone(): Color {
-		return new Color(this.r, this.g, this.b, this.a);
-	}
-
-	public copy(col: Color) {
-		this.r = col.r;
-		this.g = col.g;
-		this.b = col.b;
-		this.a = col.a;
-	}
-
-	public lerp(to: Color, t: number) {
-		this.r = this.r * t + to.r * (1.0 - t);
-		this.g = this.g * t + to.g * (1.0 - t);
-		this.b = this.b * t + to.b * (1.0 - t);
-		this.a = this.a * t + to.a * (1.0 - t);
-	}
-
-	public static parse(hex: string): Color {
-		const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
-		if (result) {
-			const c = new Color();
-			c.r = parseInt(result[1], 16) / 255;
-			c.g = parseInt(result[2], 16) / 255;
-			c.b = parseInt(result[3], 16) / 255;
-			return c;
-		} else {
-			return new Color();
-		}
-	}
-
-	public toHex(): string {
-		//https://stackoverflow.com/questions/596467/how-do-i-convert-a-float-number-to-a-whole-number-in-javascript
-		const r = ~~(this.r * 255);
-		const g = ~~(this.g * 255);
-		const b = ~~(this.b * 255);
-		return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
-	}
-}
diff --git a/src/lib/designer/designerconnection.ts b/src/lib/designer/designerconnection.ts
deleted file mode 100644
index 33ba9b10..00000000
--- a/src/lib/designer/designerconnection.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { DesignerNode } from "./designernode";
-import { Guid } from "../utils";
-
-export class DesignerNodeConn {
-	public id: string = Guid.newGuid();
-
-	leftNode: DesignerNode;
-	leftNodeOutput = ""; // if null, use first output
-
-	rightNode: DesignerNode;
-	rightNodeInput: string;
-}
diff --git a/src/lib/designer/designernode.ts b/src/lib/designer/designernode.ts
deleted file mode 100644
index b398b3b7..00000000
--- a/src/lib/designer/designernode.ts
+++ /dev/null
@@ -1,274 +0,0 @@
-import { Guid } from "../utils";
-import { Designer, NodeRenderContext } from "../designer";
-import {
-	Property,
-	FloatProperty,
-	IntProperty,
-	BoolProperty,
-	EnumProperty,
-	ColorProperty,
-	StringProperty,
-	GradientProperty,
-	IPropertyHolder,
-	ImageProperty,
-	PropertyType,
-	PropertyGroup
-} from "./properties";
-import { buildShaderProgram } from "./gl";
-import { Color } from "./color";
-import { Gradient } from "./gradient";
-import { Image } from "./image";
-
-export class NodeInput {
-	public node: DesignerNode;
-	public name: string;
-}
-
-export class DesignerNode implements IPropertyHolder {
-	public id: string = Guid.newGuid();
-	public title: string;
-	public typeName: string; // added when node is created from library
-
-	public gl: WebGLRenderingContext;
-	tex: WebGLTexture;
-	public designer: Designer;
-	exportName: string;
-
-	randomSeed: number = 0;
-
-	inputs: string[] = [];
-	properties: Property[] = [];
-	propertyGroups: PropertyGroup[] = [];
-
-	// tells scene to update the texture next frame
-	needsUpdate = true;
-
-	// callbacks
-	onthumbnailgenerated: (DesignerNode, HTMLImageElement) => void;
-
-	// an update is requested when:
-	// a property is changed
-	// a new connection is made
-	// a connection is removedscientist
-	//
-	// all output connected nodes are invalidated as well
-	private requestUpdate() {
-		this.designer.requestUpdate(this);
-	}
-
-	getPixelData(): Uint16Array {
-		return null;
-	}
-
-	getTextureData(): ArrayBuffer {
-		return null;
-	}
-
-	setRandomSeed(seed: number) {
-		this.randomSeed = seed;
-		this.requestUpdate();
-	}
-
-	public render(context: NodeRenderContext) {}
-
-	public isCpu() {
-		return true;
-	}
-
-	public getInputs(): string[] {
-		return this.inputs;
-	}
-
-	protected addInput(name: string) {
-		this.inputs.push(name);
-	}
-
-	public setProperty(name: string, value: any) {
-		const prop = this.properties.find(x => {
-			return x.name == name;
-		});
-
-		if (prop) {
-			if (prop.type == PropertyType.Image) {
-				prop.setValue(value, () => {
-					this.requestUpdate();
-				});
-			} else {
-				prop.setValue(value);
-				this.requestUpdate();
-			}
-		}
-
-		// for (let prop of this.properties) {
-		//   console.log("prop iter");
-		//   console.log(prop);
-		//   console.log(prop.name == name);
-		//   if (prop.name == name) {
-		//     prop.setValue(value);
-		//     this.requestUpdate();
-		//   }
-		// }
-	}
-
-	public _init() {
-		//this.inputs = new Array();
-		//this.properties = new Array();
-		this.createTexture();
-
-		this.init();
-	}
-
-	protected init() {}
-
-	// creates opengl texture for this node
-	// gets the height from the scene
-	// if the texture is already created, delete it and recreate it
-	createTexture() {
-		const gl = this.gl as WebGL2RenderingContext;
-
-		if (this.tex) {
-			gl.deleteTexture(this.tex);
-			this.tex = null;
-		}
-
-		const tex = gl.createTexture();
-		gl.bindTexture(gl.TEXTURE_2D, tex);
-
-		const level = 0;
-		const internalFormat = gl.RGBA16F;
-		const border = 0;
-		const format = gl.RGBA;
-		const type = gl.FLOAT;
-		const data = null;
-		gl.texImage2D(
-			gl.TEXTURE_2D,
-			level,
-			internalFormat,
-			this.designer.width,
-			this.designer.height,
-			border,
-			format,
-			type,
-			data
-		);
-
-		// set the filtering so we don't need mips
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
-
-		gl.bindTexture(gl.TEXTURE_2D, null);
-
-		this.tex = tex;
-	}
-
-	createGroup(name: string): PropertyGroup {
-		const group = new PropertyGroup();
-		group.name = name;
-		this.propertyGroups.push(group);
-
-		return group;
-	}
-
-	// PROPERTY FUNCTIONS
-	addIntProperty(
-		id: string,
-		displayName: string,
-		defaultVal = 1,
-		minVal = 1,
-		maxVal = 100,
-		increment = 1
-	): IntProperty {
-		const prop = new IntProperty(id, displayName, defaultVal);
-		prop.minValue = minVal;
-		prop.maxValue = maxVal;
-		prop.step = increment;
-
-		this.properties.push(prop);
-		return prop;
-	}
-
-	addFloatProperty(
-		id: string,
-		displayName: string,
-		defaultVal = 1,
-		minVal = 1,
-		maxVal = 100,
-		increment = 1
-	): FloatProperty {
-		const prop = new FloatProperty(id, displayName, defaultVal);
-		prop.minValue = minVal;
-		prop.maxValue = maxVal;
-		prop.step = increment;
-
-		this.properties.push(prop);
-		return prop;
-	}
-
-	addBoolProperty(
-		id: string,
-		displayName: string,
-		defaultVal = false
-	): BoolProperty {
-		const prop = new BoolProperty(id, displayName, defaultVal);
-
-		this.properties.push(prop);
-		return prop;
-	}
-
-	addEnumProperty(
-		id: string,
-		displayName: string,
-		defaultVal: string[] = []
-	): EnumProperty {
-		const prop = new EnumProperty(id, displayName, defaultVal);
-
-		this.properties.push(prop);
-		return prop;
-	}
-
-	addColorProperty(
-		id: string,
-		displayName: string,
-		defaultVal: Color
-	): ColorProperty {
-		const prop = new ColorProperty(id, displayName, defaultVal);
-
-		this.properties.push(prop);
-		return prop;
-	}
-
-	addStringProperty(
-		id: string,
-		displayName: string,
-		defaultVal = ""
-	): StringProperty {
-		const prop = new StringProperty(id, displayName, defaultVal);
-
-		this.properties.push(prop);
-		return prop;
-	}
-
-	addGradientProperty(
-		id: string,
-		displayName: string,
-		defaultVal: Gradient
-	): GradientProperty {
-		const prop = new GradientProperty(id, displayName, defaultVal);
-
-		this.properties.push(prop);
-		return prop;
-	}
-
-	addImageProperty(
-		id: string,
-		displayName: string,
-		defaultVal: Image
-	): ImageProperty {
-		const prop = new ImageProperty(id, displayName, defaultVal);
-
-		this.properties.push(prop);
-		return prop;
-	}
-}
diff --git a/src/lib/designer/designervariable.ts b/src/lib/designer/designervariable.ts
deleted file mode 100644
index f91b1b85..00000000
--- a/src/lib/designer/designervariable.ts
+++ /dev/null
@@ -1,27 +0,0 @@
-import { DesignerNode } from "./designernode";
-import { Property } from "./properties";
-
-export enum DesignerVariableType {
-	None = 0,
-	Float = 1,
-	Int = 2,
-	Bool = 3,
-	Enum = 4,
-	Color = 5
-	//Gradient
-}
-
-export class DesignerNodePropertyMap {
-	public node: DesignerNode;
-	public propertyName: string;
-}
-
-export class DesignerVariable {
-	id: string;
-
-	type: DesignerVariableType;
-	// used to keep the value in bounds
-	property: Property;
-
-	nodes: DesignerNodePropertyMap[] = [];
-}
diff --git a/src/lib/designer/gl.ts b/src/lib/designer/gl.ts
deleted file mode 100644
index a827060c..00000000
--- a/src/lib/designer/gl.ts
+++ /dev/null
@@ -1,202 +0,0 @@
-export function createTexture(
-	gl: WebGLRenderingContext,
-	width: number,
-	height: number
-): WebGLTexture {
-	const texture = gl.createTexture();
-	gl.bindTexture(gl.TEXTURE_2D, texture);
-
-	// Set the parameters so we can render any size image.
-	//gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
-	//gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-
-	// Upload the image into the texture.
-	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, null);
-
-	return texture;
-}
-
-export enum TextureDataType {
-	Uint8,
-	Uint16,
-	Float16,
-	Float32
-}
-
-// assumes all textures are RGBA
-export function createTextureWithType(
-	gl: WebGL2RenderingContext,
-	dataType: TextureDataType,
-	width: number,
-	height: number
-): WebGLTexture {
-	const texture = gl.createTexture();
-	gl.bindTexture(gl.TEXTURE_2D, texture);
-
-	let ext = gl.getExtension("EXT_texture_norm16");
-
-	// format of data being passed to GPU
-	// let internalFormat: number = gl.RGBA;
-	// let type: number = gl.UNSIGNED_BYTE;
-
-	// // format and components the texture should actually store
-	// let format: number = gl.RGBA8;
-
-	// webgl has a guide for the combination of these
-	// properties(internalFormat, format, type)
-	// https://www.khronos.org/files/webgl20-reference-guide.pdf
-
-	// Upload the image into the texture.
-	switch (dataType) {
-		case TextureDataType.Uint8:
-			// gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, null);
-			gl.texImage2D(
-				gl.TEXTURE_2D,
-				0,
-				gl.RGBA8,
-				width,
-				height,
-				0,
-				gl.RGBA,
-				gl.UNSIGNED_BYTE,
-				null
-			);
-			break;
-		case TextureDataType.Uint16:
-			// gl.texImage2D(
-			// 	gl.TEXTURE_2D,
-			// 	0,
-			// 	gl.RGBA16UI,
-			// 	width,
-			// 	height,
-			// 	0,
-			// 	gl.RGBA,
-			// 	gl.UNSIGNED_SHORT,
-			// 	null
-			// );
-
-			gl.texImage2D(
-				gl.TEXTURE_2D,
-				0,
-				ext.RGBA16_EXT,
-				width,
-				height,
-				0,
-				gl.RGBA,
-				gl.UNSIGNED_SHORT,
-				null
-			);
-			break;
-		case TextureDataType.Float16:
-			gl.texImage2D(
-				gl.TEXTURE_2D,
-				0,
-				gl.RGBA16F,
-				width,
-				height,
-				0,
-				gl.RGBA,
-				gl.FLOAT,
-				null
-			);
-			break;
-		case TextureDataType.Float32:
-			gl.texImage2D(
-				gl.TEXTURE_2D,
-				0,
-				gl.RGBA32F,
-				width,
-				height,
-				0,
-				gl.RGBA,
-				gl.FLOAT,
-				null
-			);
-			break;
-	}
-
-	// gl.texImage2D(
-	// 	gl.TEXTURE_2D,
-	// 	0,
-	// 	internalFormat,
-	// 	width,
-	// 	height,
-	// 	0,
-	// 	format,
-	// 	type,
-	// 	null
-	// );
-
-	// Set the parameters so we can render any size image.
-	//gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
-	//gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-
-	return texture;
-}
-
-export function getShaderSource(id) {
-	const shaderScript = document.getElementById(id);
-	if (!shaderScript) {
-		return null;
-	}
-
-	let str = "";
-	let k = shaderScript.firstChild;
-	while (k) {
-		if (k.nodeType == 3) {
-			str += k.textContent;
-		}
-		k = k.nextSibling;
-	}
-
-	return str;
-}
-
-export function compileShader(gl, source, shaderType) {
-	const shader = gl.createShader(shaderType);
-
-	gl.shaderSource(shader, source);
-	gl.compileShader(shader);
-
-	if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
-		alert(gl.getShaderInfoLog(shader));
-		return null;
-	}
-
-	return shader;
-}
-
-export function buildShaderProgram(gl, vertSource, fragSource) {
-	const vertexShader = compileShader(gl, vertSource, gl.VERTEX_SHADER);
-	const fragmentShader = compileShader(gl, fragSource, gl.FRAGMENT_SHADER);
-
-	const shaderProgram = gl.createProgram();
-	gl.attachShader(shaderProgram, vertexShader);
-	gl.attachShader(shaderProgram, fragmentShader);
-	gl.linkProgram(shaderProgram);
-
-	if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
-		alert("Could not initialise shaders");
-	}
-
-	gl.useProgram(shaderProgram);
-	/*
-    shaderProgram.samplerLoc = gl.getUniformLocation(shaderProgram, "tex");
- 
-    shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
-    gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);
- 
-    shaderProgram.vertexUVAttribute = gl.getAttribLocation(shaderProgram, "aVertexUV");
-    gl.enableVertexAttribArray(shaderProgram.vertexUVAttribute);
-    */
-
-	return shaderProgram;
-}
diff --git a/src/lib/designer/gpudesignernode.ts b/src/lib/designer/gpudesignernode.ts
deleted file mode 100644
index 79f9c676..00000000
--- a/src/lib/designer/gpudesignernode.ts
+++ /dev/null
@@ -1,541 +0,0 @@
-import { Guid } from "../utils";
-import { Designer, NodeRenderContext } from "../designer";
-import {
-	Property,
-	FloatProperty,
-	IntProperty,
-	BoolProperty,
-	EnumProperty,
-	ColorProperty,
-	StringProperty,
-	GradientProperty,
-	IPropertyHolder
-} from "./properties";
-import { buildShaderProgram } from "./gl";
-import { Color } from "./color";
-import { Gradient } from "./gradient";
-import { DesignerNode } from "./designernode";
-
-export class GpuDesignerNode extends DesignerNode {
-	// tex: WebGLTexture;
-	readFbo: WebGLFramebuffer;
-	//program:WebGLShader;
-	source: string; // shader code
-	shaderProgram: WebGLProgram;
-
-	public isCpu() {
-		return false;
-	}
-
-	// https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/readPixels
-	// returns copy of data
-	getPixelData(): Uint16Array {
-		const gl = this.gl as WebGL2RenderingContext;
-		const width = this.designer.width;
-		const height = this.designer.height;
-		const data = new Uint16Array(width * height * 4);
-
-		gl.bindFramebuffer(gl.FRAMEBUFFER, this.readFbo);
-		gl.framebufferTexture2D(
-			gl.FRAMEBUFFER,
-			gl.COLOR_ATTACHMENT0,
-			gl.TEXTURE_2D,
-			this.tex,
-			0
-		);
-		if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) === gl.FRAMEBUFFER_COMPLETE) {
-			gl.readPixels(0, 0, width, height, gl.RGBA, gl.HALF_FLOAT, data);
-			// todo: check for errors in this operation
-			// gl.readPixels(
-			// 	0,
-			// 	0,
-			// 	this.designer.width,
-			// 	this.designer.height,
-			// 	gl.RGBA,
-			// 	gl.HALF_FLOAT,
-			// 	data
-			// );
-		} else {
-			alert("getPixelData: unable to read from FBO");
-		}
-		gl.bindFramebuffer(gl.FRAMEBUFFER, null);
-
-		return data;
-	}
-
-	public render(context: NodeRenderContext) {
-		const inputs = context.inputs;
-		const gl = this.gl;
-
-		gl.bindFramebuffer(gl.FRAMEBUFFER, context.fbo);
-		gl.activeTexture(gl.TEXTURE0);
-		gl.framebufferTexture2D(
-			gl.FRAMEBUFFER,
-			gl.COLOR_ATTACHMENT0,
-			gl.TEXTURE_2D,
-			this.tex,
-			0
-		);
-
-		gl.viewport(0, 0, context.textureWidth, context.textureHeight);
-
-		// bind texture to fbo
-		//gl.clearColor(0,0,1,1);
-		gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
-
-		// bind shader
-		gl.useProgram(this.shaderProgram);
-
-		// clear all inputs
-		for (const input of this.inputs) {
-			gl.activeTexture(gl.TEXTURE0 + texIndex);
-			gl.bindTexture(gl.TEXTURE_2D, null);
-
-			gl.uniform1i(gl.getUniformLocation(this.shaderProgram, input), 0);
-
-			gl.uniform1i(
-				gl.getUniformLocation(this.shaderProgram, input + "_connected"),
-				0
-			);
-		}
-
-		// pass inputs for rendering
-		var texIndex = 0;
-		for (const input of inputs) {
-			gl.activeTexture(gl.TEXTURE0 + texIndex);
-			gl.bindTexture(gl.TEXTURE_2D, input.node.tex);
-			gl.uniform1i(
-				gl.getUniformLocation(this.shaderProgram, input.name),
-				texIndex
-			);
-			gl.uniform1i(
-				gl.getUniformLocation(this.shaderProgram, input.name + "_connected"),
-				1
-			);
-			//console.log("bound texture " + texIndex);
-			texIndex++;
-		}
-
-		// pass seed
-		gl.uniform1f(
-			gl.getUniformLocation(this.shaderProgram, "_seed"),
-			this.randomSeed + this.designer.getRandomSeed()
-		);
-
-		// texture size
-		gl.uniform2f(
-			gl.getUniformLocation(this.shaderProgram, "_textureSize"),
-			this.designer.width,
-			this.designer.height
-		);
-
-		// pass properties
-		for (const prop of this.properties) {
-			if (prop instanceof FloatProperty) {
-				gl.uniform1f(
-					gl.getUniformLocation(this.shaderProgram, "prop_" + prop.name),
-					(prop as FloatProperty).value
-				);
-			}
-			if (prop instanceof IntProperty) {
-				gl.uniform1i(
-					gl.getUniformLocation(this.shaderProgram, "prop_" + prop.name),
-					(prop as IntProperty).value
-				);
-			}
-			if (prop instanceof BoolProperty) {
-				gl.uniform1i(
-					gl.getUniformLocation(this.shaderProgram, "prop_" + prop.name),
-					(prop as BoolProperty).value == false ? 0 : 1
-				);
-			}
-			if (prop instanceof EnumProperty) {
-				gl.uniform1i(
-					gl.getUniformLocation(this.shaderProgram, "prop_" + prop.name),
-					(prop as EnumProperty).index
-				);
-			}
-			if (prop instanceof ColorProperty) {
-				const col = (prop as ColorProperty).value;
-				//console.log("color: ", col);
-				gl.uniform4f(
-					gl.getUniformLocation(this.shaderProgram, "prop_" + prop.name),
-					col.r,
-					col.g,
-					col.b,
-					col.a
-				);
-			}
-			if (prop instanceof GradientProperty) {
-				const gradient = (prop as GradientProperty).value;
-
-				gl.uniform1i(
-					gl.getUniformLocation(
-						this.shaderProgram,
-						"prop_" + prop.name + ".numPoints"
-					),
-					gradient.points.length
-				);
-
-				for (let i = 0; i < gradient.points.length; i++) {
-					const point = gradient.points[i];
-					const col = point.color;
-
-					gl.uniform3f(
-						gl.getUniformLocation(
-							this.shaderProgram,
-							"prop_" + prop.name + ".colors[" + i + "]"
-						),
-						col.r,
-						col.g,
-						col.b
-					);
-
-					gl.uniform1f(
-						gl.getUniformLocation(
-							this.shaderProgram,
-							"prop_" + prop.name + ".positions[" + i + "]"
-						),
-						point.t
-					);
-				}
-			}
-		}
-
-		// bind mesh
-		const posLoc = gl.getAttribLocation(this.shaderProgram, "a_pos");
-		const texCoordLoc = gl.getAttribLocation(this.shaderProgram, "a_texCoord");
-
-		// provide texture coordinates for the rectangle.
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.designer.posBuffer);
-		gl.enableVertexAttribArray(posLoc);
-		gl.vertexAttribPointer(posLoc, 3, gl.FLOAT, false, 0, 0);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.designer.texCoordBuffer);
-		gl.enableVertexAttribArray(texCoordLoc);
-		gl.vertexAttribPointer(texCoordLoc, 2, gl.FLOAT, false, 0, 0);
-
-		gl.drawArrays(gl.TRIANGLES, 0, 6);
-
-		gl.disableVertexAttribArray(posLoc);
-		gl.disableVertexAttribArray(texCoordLoc);
-
-		gl.bindFramebuffer(gl.FRAMEBUFFER, null);
-	}
-
-	public _init() {
-		//this.inputs = new Array();
-		//this.properties = new Array();
-
-		this.readFbo = this.gl.createFramebuffer();
-		this.createTexture();
-
-		this.init();
-	}
-
-	// #source gets appended to fragment shader
-	buildShader(source: string) {
-		const vertSource = `#version 300 es
-        precision highp float;
-
-        in vec3 a_pos;
-        in vec2 a_texCoord;
-            
-        // the texCoords passed in from the vertex shader.
-        out vec2 v_texCoord;
-            
-        void main() {
-            gl_Position = vec4(a_pos,1.0);
-            v_texCoord = a_texCoord;
-        }`;
-
-		let fragSource = `#version 300 es
-        precision highp float;
-        in vec2 v_texCoord;
-
-        #define GRADIENT_MAX_POINTS 32
-
-        vec4 process(vec2 uv);
-        void initRandom();
-
-        uniform vec2 _textureSize;
-
-        out vec4 fragColor;
-            
-        void main() {
-            initRandom();
-			vec4 result = process(v_texCoord);
-			fragColor = clamp(result, 0.0, 1.0);
-        }
-
-        `;
-
-		fragSource =
-			fragSource +
-			this.createRandomLib() +
-			this.createGradientLib() +
-			this.createCodeForInputs() +
-			this.createCodeForProps() +
-			"#line 0\n" +
-			source;
-
-		this.shaderProgram = buildShaderProgram(this.gl, vertSource, fragSource);
-	}
-
-	createRandomLibOld(): string {
-		// float _seed = `+this.designer.getRandomSeed().toFixed(1)+`;
-		const code = `
-        // this offsets the random start (should be a uniform)
-        uniform float _seed;
-        // this is the starting number for the rng
-        // (should be set from the uv coordinates so it's unique per pixel)
-        vec2 _randomStart;
-
-        float _rand(vec2 co){
-            return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
-        }
-
-        //todo: test variance!
-        vec2 _rand2(vec2 co){
-            return vec2(_rand(co), _rand(co + vec2(0.0001, 0.0001)));
-        }
-
-        float randomFloat(int index) 
-        {
-            return _rand(_randomStart + vec2(_seed) + vec2(index));
-        }
-
-        float randomVec2(int index) 
-        {
-            return _rand(_randomStart + vec2(_seed) + vec2(index));
-        }
-
-        float randomFloat(int index, float start, float end)
-        {
-            float r = _rand(_randomStart + vec2(_seed) + vec2(index));
-            return start + r*(end-start);
-        }
-
-        int randomInt(int index, int start, int end)
-        {
-            float r = _rand(_randomStart + vec2(_seed) + vec2(index));
-            return start + int(r*float(end-start));
-        }
-
-        bool randomBool(int index)
-        {
-            return _rand(_randomStart + vec2(_seed) + vec2(index)) > 0.5;
-        }
-
-        void initRandom()
-        {
-            _randomStart = v_texCoord;
-        }
-        `;
-
-		return code;
-	}
-
-	createRandomLib(): string {
-		// float _seed = `+this.designer.getRandomSeed().toFixed(1)+`;
-		const code = `
-        // this offsets the random start (should be a uniform)
-        uniform float _seed;
-        // this is the starting number for the rng
-        // (should be set from the uv coordinates so it's unique per pixel)
-        vec2 _randomStart;
-
-        // gives a much better distribution at 1
-        #define RANDOM_ITERATIONS 1
-
-        #define HASHSCALE1 443.8975
-        #define HASHSCALE3 vec3(443.897, 441.423, 437.195)
-        #define HASHSCALE4 vec4(443.897, 441.423, 437.195, 444.129)
-
-        //  1 out, 2 in...
-        float hash12(vec2 p)
-        {
-            vec3 p3  = fract(vec3(p.xyx) * HASHSCALE1);
-            p3 += dot(p3, p3.yzx + 19.19);
-            return fract((p3.x + p3.y) * p3.z);
-        }
-
-        ///  2 out, 2 in...
-        vec2 hash22(vec2 p)
-        {
-            vec3 p3 = fract(vec3(p.xyx) * HASHSCALE3);
-            p3 += dot(p3, p3.yzx+19.19);
-            return fract((p3.xx+p3.yz)*p3.zy);
-
-        }
-
-
-        float _rand(vec2 uv)
-        {
-            float a = 0.0;
-            for (int t = 0; t < RANDOM_ITERATIONS; t++)
-            {
-                float v = float(t+1)*.152;
-                // 0.005 is a good value
-                vec2 pos = (uv * v);
-                a += hash12(pos);
-            }
-
-            return a/float(RANDOM_ITERATIONS);
-        }
-
-        vec2 _rand2(vec2 uv)
-        {
-            vec2 a = vec2(0.0);
-            for (int t = 0; t < RANDOM_ITERATIONS; t++)
-            {
-                float v = float(t+1)*.152;
-                // 0.005 is a good value
-                vec2 pos = (uv * v);
-                a += hash22(pos);
-            }
-
-            return a/float(RANDOM_ITERATIONS);
-        }
-
-        float randomFloat(int index) 
-        {
-            return _rand(_randomStart + vec2(_seed) + vec2(index));
-        }
-
-        float randomVec2(int index) 
-        {
-            return _rand(_randomStart + vec2(_seed) + vec2(index));
-        }
-
-        float randomFloat(int index, float start, float end)
-        {
-            float r = _rand(_randomStart + vec2(_seed) + vec2(index));
-            return start + r*(end-start);
-        }
-
-        int randomInt(int index, int start, int end)
-        {
-            float r = _rand(_randomStart + vec2(_seed) + vec2(index));
-            return start + int(r*float(end-start));
-        }
-
-        bool randomBool(int index)
-        {
-            return _rand(_randomStart + vec2(_seed) + vec2(index)) > 0.5;
-        }
-
-        void initRandom()
-        {
-            _randomStart = v_texCoord;
-        }
-        `;
-
-		return code;
-	}
-
-	createGradientLib(): string {
-		// float _seed = `+this.designer.getRandomSeed().toFixed(1)+`;
-		const code = `
-    struct Gradient {
-				vec3 colors[GRADIENT_MAX_POINTS];
-				float positions[GRADIENT_MAX_POINTS];
-				int numPoints;
-    };
-        
-    // assumes points are sorted
-    vec3 sampleGradient(vec3 colors[GRADIENT_MAX_POINTS], float positions[GRADIENT_MAX_POINTS], int numPoints, float t)
-    {
-        if (numPoints == 0)
-            return vec3(1,0,0);
-        
-        if (numPoints == 1)
-            return colors[0];
-        
-        // here at least two points are available
-        if (t <= positions[0])
-            return colors[0];
-        
-        int last = numPoints - 1;
-        if (t >= positions[last])
-            return colors[last];
-        
-        // find two points in-between and lerp
-        
-        for(int i = 0; i < numPoints-1;i++) {
-            if (positions[i+1] > t) {
-                vec3 colorA = colors[i];
-                vec3 colorB = colors[i+1];
-                
-                float t1 = positions[i];
-                float t2 = positions[i+1];
-                
-                float lerpPos = (t - t1)/(t2 - t1);
-                return mix(colorA, colorB, lerpPos);
-                
-            }
-            
-        }
-        
-        return vec3(0,0,0);
-    }
-
-    vec3 sampleGradient(Gradient gradient, float t)
-    {
-      return sampleGradient(gradient.colors, gradient.positions, gradient.numPoints, t);
-    }
-    `;
-
-		return code;
-	}
-
-	createCodeForInputs() {
-		let code = "";
-
-		for (const input of this.inputs) {
-			code += "uniform sampler2D " + input + ";\n";
-			code += "uniform bool " + input + "_connected;\n";
-		}
-
-		return code;
-	}
-
-	createCodeForProps() {
-		let code = "";
-
-		//console.log(this.properties);
-		//console.log(typeof FloatProperty);
-
-		for (const prop of this.properties) {
-			//code += "uniform sampler2D " + input + ";\n";
-			if (prop instanceof FloatProperty) {
-				code += "uniform float prop_" + prop.name + ";\n";
-			}
-			if (prop instanceof IntProperty) {
-				code += "uniform int prop_" + prop.name + ";\n";
-			}
-			if (prop instanceof BoolProperty) {
-				code += "uniform bool prop_" + prop.name + ";\n";
-			}
-			if (prop instanceof EnumProperty) {
-				code += "uniform int prop_" + prop.name + ";\n";
-			}
-			if (prop instanceof ColorProperty) {
-				code += "uniform vec4 prop_" + prop.name + ";\n";
-			}
-			if (prop instanceof GradientProperty) {
-				// code += "uniform struct prop_" + prop.name + " {\n";
-				// code += "vec3 colors[GRADIENT_MAX_POINTS];\n";
-				// code += "vec3 positions[GRADIENT_MAX_POINTS];\n";
-				// code += "int numPoints;\n";
-				// code += "};";
-
-				code += "uniform Gradient prop_" + prop.name + ";\n";
-			}
-		}
-
-		code += "\n";
-
-		return code;
-	}
-}
diff --git a/src/lib/designer/gradient.ts b/src/lib/designer/gradient.ts
deleted file mode 100644
index 9a80e412..00000000
--- a/src/lib/designer/gradient.ts
+++ /dev/null
@@ -1,103 +0,0 @@
-import { Color } from "./color";
-
-export class GradientPoint {
-	// position on gradient
-	t: number;
-
-	// color of point
-	color: Color;
-}
-
-export class Gradient {
-	points: GradientPoint[];
-
-	constructor() {
-		this.points = [];
-	}
-
-	addPoint(t: number, color: Color): GradientPoint {
-		const point = new GradientPoint();
-		point.t = t;
-		point.color = color;
-
-		this.points.push(point);
-		this.sort();
-
-		return point;
-	}
-
-	removePoint(point: GradientPoint) {
-		this.points.splice(this.points.indexOf(point), 1);
-	}
-
-	clear() {
-		this.points = [];
-	}
-
-	sort() {
-		this.points.sort(function(a: GradientPoint, b: GradientPoint) {
-			return a.t - b.t;
-		});
-	}
-
-	sample(t: number): Color {
-		if (this.points.length == 0) return new Color();
-		if (this.points.length == 1) return this.points[0].color.clone();
-
-		// here at least two points are available
-		if (t < this.points[0].t) return this.points[0].color.clone();
-
-		const last = this.points.length - 1;
-		if (t > this.points[last].t) return this.points[last].color.clone();
-
-		// find two points and lerp
-		for (let i = 0; i < this.points.length - 1; i++) {
-			if (this.points[i + 1].t > t) {
-				const p1 = this.points[i];
-				const p2 = this.points[i + 1];
-
-				const lerpPos = (t - p1.t) / (p2.t - p1.t);
-				const color = new Color();
-				color.copy(p1.color);
-				color.lerp(p2.color, lerpPos);
-
-				return color;
-			}
-		}
-
-		// should never get to this point
-		return new Color();
-	}
-
-	clone() {
-		const grad = new Gradient();
-		grad.clear();
-
-		for (const p of this.points) {
-			grad.addPoint(p.t, p.color.clone());
-		}
-
-		return grad;
-	}
-
-	public static parse(obj: any) {
-		const gradient = new Gradient();
-		for (const p of obj.points) {
-			const t = p.t;
-			const color = new Color();
-			color.copy(p.color);
-
-			gradient.addPoint(t, color);
-		}
-
-		return gradient;
-	}
-
-	public static default() {
-		const gradient = new Gradient();
-		gradient.addPoint(0, new Color(0, 0, 0, 1.0));
-		gradient.addPoint(1, new Color(1, 1, 1, 1.0));
-
-		return gradient;
-	}
-}
diff --git a/src/lib/designer/image.ts b/src/lib/designer/image.ts
deleted file mode 100644
index e2173129..00000000
--- a/src/lib/designer/image.ts
+++ /dev/null
@@ -1,118 +0,0 @@
-import { NativeImage } from "electron";
-
-enum ImageSource {
-	Inline = "inline", // in .texture file
-	Embedded = "embedded" // in .texlab package as a seperate file
-}
-
-export class Image {
-	canvas: HTMLCanvasElement;
-	path: string;
-	src: string;
-	type: ImageSource;
-
-	constructor(
-		path: string,
-		canvasSource: CanvasImageSource,
-		width: number,
-		height: number
-	) {
-		this.init(path, canvasSource, width, height);
-	}
-
-	private init(
-		path: string,
-		canvasSource: CanvasImageSource,
-		width: number,
-		height: number
-	) {
-		if (canvasSource != null) {
-			let canvas = document.createElement("canvas") as HTMLCanvasElement;
-			canvas.width = width;
-			canvas.height = height;
-
-			let ctx = canvas.getContext("2d");
-			ctx.drawImage(canvasSource, 0, 0);
-
-			this.canvas = canvas;
-		}
-
-		this.path = path;
-	}
-
-	get isEmpty() {
-		return this.canvas == null;
-	}
-
-	static empty(): Image {
-		return new Image(null, null, 0, 0);
-	}
-
-	static load(path: string): Image {
-		let nativeImage = NativeImage.createFromPath(path);
-		let img: HTMLImageElement = document.createElement(
-			"image"
-		) as HTMLImageElement;
-
-		img.src = nativeImage.toDataURL();
-
-		return new Image(path, img, img.width, img.height);
-	}
-
-	clone(): Image {
-		return new Image(this.path, this.canvas, this.width, this.height);
-	}
-
-	get width() {
-		return this.canvas.width;
-	}
-
-	get height() {
-		return this.canvas.height;
-	}
-
-	serialize() {
-		return {
-			type: ImageSource.Inline,
-			src: this.canvas.toDataURL("image/png")
-		};
-	}
-
-	// handle async
-	deserialize(obj: any, completeCallback: () => void = null) {
-		console.log(obj);
-
-		// note: only works with inline images right now
-		if (obj.type !== ImageSource.Inline) return;
-
-		let img: HTMLImageElement = document.createElement(
-			"img"
-		) as HTMLImageElement;
-
-		img.onload = () => {
-			console.log("image loaded");
-			console.log(img);
-			console.log(img.width);
-			console.log(img.height);
-
-			// // flip image
-			// let canvas = document.createElement("canvas");
-			// canvas.width = img.width;
-			// canvas.height = img.height;
-
-			// let ctx = canvas.getContext("2d");
-			// ctx.save();
-			// ctx.clearRect(0, 0, canvas.width, canvas.height);
-			// //ctx.translate(0, img.height);
-			// //ctx.scale(1, -1);
-			// ctx.drawImage(img, 0, 0, img.width, img.height);
-			// ctx.restore();
-
-			this.init("", img, img.width, img.height);
-
-			completeCallback();
-		};
-
-		img.src = obj.src;
-	}
-}
diff --git a/src/lib/designer/imagecanvas.ts b/src/lib/designer/imagecanvas.ts
deleted file mode 100644
index ac88fa8d..00000000
--- a/src/lib/designer/imagecanvas.ts
+++ /dev/null
@@ -1,79 +0,0 @@
-export class ImageCanvas {
-	canvas: HTMLCanvasElement;
-	context: CanvasRenderingContext2D;
-
-	constructor(width = 1024, height = 1024) {
-		this.canvas = document.createElement("canvas");
-		this.canvas.width = width;
-		this.canvas.height = height;
-		this.context = this.canvas.getContext("2d");
-	}
-
-	// copies image from source
-	// scales the image to fit dest canvas
-	copyFromCanvas(src: HTMLCanvasElement, resize = false) {
-		if (resize) {
-			if (this.canvas.width != src.width) this.canvas.width = src.width;
-			if (this.canvas.height != src.height) this.canvas.height = src.height;
-		}
-		//console.log("copying from " + src.width + " to " + this.canvas.width);
-		this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
-		this.context.drawImage(src, 0, 0, this.canvas.width, this.canvas.height);
-	}
-
-	copyFromImageCanvas(imageCanvas: ImageCanvas) {
-		this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
-		this.context.drawImage(
-			imageCanvas.canvas,
-			0,
-			0,
-			this.canvas.width,
-			this.canvas.height
-		);
-	}
-
-	resize(width: number, height: number) {
-		this.canvas.width = width;
-		this.canvas.height = height;
-	}
-
-	width(): number {
-		return this.canvas.width;
-	}
-
-	height(): number {
-		return this.canvas.height;
-	}
-
-	toImage(): HTMLImageElement {
-		const img: HTMLImageElement = <HTMLImageElement>(
-			document.createElement("image")
-		);
-		//var img:HTMLImageElement = new Image(this.width, this.height);
-		img.src = this.canvas.toDataURL("image/png");
-
-		return img;
-	}
-
-	createTexture(gl: WebGLRenderingContext): WebGLTexture {
-		const texture = gl.createTexture();
-		gl.bindTexture(gl.TEXTURE_2D, texture);
-
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-
-		// Upload the image into the texture.
-		gl.texImage2D(
-			gl.TEXTURE_2D,
-			0,
-			gl.RGBA,
-			gl.RGBA,
-			gl.UNSIGNED_BYTE,
-			this.canvas
-		);
-
-		return texture;
-	}
-}
diff --git a/src/lib/designer/library.ts b/src/lib/designer/library.ts
deleted file mode 100644
index d9ad8c15..00000000
--- a/src/lib/designer/library.ts
+++ /dev/null
@@ -1,44 +0,0 @@
-import { DesignerNode } from "./designernode";
-
-export class DesignerNodeFactory {
-	public name: string;
-	public displayName: string;
-	public create: () => DesignerNode;
-}
-
-// holds list of node factories
-export class DesignerLibrary {
-	versionName: string;
-	nodes = [];
-
-	// https://www.snip2code.com/Snippet/685188/Create-instance-of-generic-type-on-TypeS
-	public addNode<T extends DesignerNode>(
-		name: string,
-		displayName: string,
-		type: { new (): T }
-	) {
-		const factory = new DesignerNodeFactory();
-		factory.name = name;
-		factory.displayName = displayName;
-		factory.create = (): DesignerNode => {
-			return new type();
-		};
-
-		//this.nodes.push(factory);
-		this.nodes[name] = factory;
-	}
-
-	getVersionName() {
-		return this.versionName;
-	}
-
-	public create(name: string): DesignerNode {
-		//if (this.nodes.indexOf(name) == -1)
-		//    return null;
-
-		const node = this.nodes[name].create();
-		node.typeName = name;
-
-		return node;
-	}
-}
diff --git a/src/lib/designer/properties.ts b/src/lib/designer/properties.ts
deleted file mode 100644
index 375af7b9..00000000
--- a/src/lib/designer/properties.ts
+++ /dev/null
@@ -1,376 +0,0 @@
-import { Color } from "./color";
-import { Gradient } from "./gradient";
-import { Image } from "./image";
-
-// for use in code after build
-export enum PropertyType {
-	Float = "float",
-	Int = "int",
-	Bool = "bool",
-	Color = "color",
-	Enum = "enum",
-	String = "string",
-	Gradient = "gradient",
-	Image = "image"
-}
-
-export class PropertyGroup {
-	name: string = "";
-	properties: Property[] = [];
-	collapsed: boolean = true;
-
-	add(prop: Property) {
-		this.properties.push(prop);
-		prop.group = this;
-	}
-}
-
-export class Property {
-	public name: string;
-	public displayName: string;
-	public type: string;
-
-	public group: PropertyGroup;
-
-	// to be overriden
-	public getValue(): any {
-		return null;
-	}
-
-	public setValue(val: any, completeCallback: () => void = null) {}
-
-	public clone(): Property {
-		return null;
-	}
-}
-
-export interface IPropertyHolder {
-	properties: Property[];
-	propertyGroups: PropertyGroup[];
-	setProperty(name: string, value: any);
-}
-
-export class FloatProperty extends Property {
-	value: number;
-	minValue = 0;
-	maxValue = 1;
-	step = 1;
-	public constructor(
-		name: string,
-		displayName: string,
-		value: number,
-		step = 1
-	) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.value = value;
-		this.step = step;
-		this.type = PropertyType.Float;
-	}
-
-	public getValue(): any {
-		return this.value;
-	}
-
-	public setValue(val: any) {
-		// todo: validate
-		this.value = val;
-	}
-
-	public clone(): Property {
-		const prop = new FloatProperty(
-			this.name,
-			this.displayName,
-			this.value,
-			this.step
-		);
-		prop.minValue = this.minValue;
-		prop.maxValue = this.maxValue;
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: FloatProperty) {
-		this.minValue = prop.minValue;
-		this.maxValue = prop.maxValue;
-		this.value = prop.value;
-		this.step = prop.step;
-	}
-}
-
-export class IntProperty extends Property {
-	value: number;
-	minValue = 0;
-	maxValue = 100;
-	step = 1;
-	public constructor(
-		name: string,
-		displayName: string,
-		value: number,
-		step = 1
-	) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.value = value;
-		this.step = step;
-		this.type = PropertyType.Int;
-	}
-
-	public getValue(): any {
-		return this.value;
-	}
-
-	public setValue(val: any) {
-		// todo: validate
-		this.value = val;
-	}
-
-	public clone(): Property {
-		const prop = new IntProperty(
-			this.name,
-			this.displayName,
-			this.value,
-			this.step
-		);
-		prop.minValue = this.minValue;
-		prop.maxValue = this.maxValue;
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: IntProperty) {
-		this.minValue = prop.minValue;
-		this.maxValue = prop.maxValue;
-		this.value = prop.value;
-		this.step = prop.step;
-	}
-}
-
-export class BoolProperty extends Property {
-	value: boolean;
-	public constructor(name: string, displayName: string, value: boolean) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.value = value;
-		this.type = PropertyType.Bool;
-	}
-
-	public getValue(): any {
-		return this.value;
-	}
-
-	public setValue(val: any) {
-		// todo: validate
-		this.value = val;
-	}
-
-	public clone(): Property {
-		const prop = new BoolProperty(this.name, this.displayName, this.value);
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: BoolProperty) {
-		this.value = prop.value;
-	}
-}
-
-export class EnumProperty extends Property {
-	values: string[];
-	index = 0;
-	public constructor(name: string, displayName: string, values: string[]) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.values = values;
-		this.type = PropertyType.Enum;
-	}
-
-	public getValues(): string[] {
-		return this.values;
-	}
-
-	public getValue(): any {
-		return this.index;
-	}
-
-	public setValue(val: any) {
-		// todo: validate
-		this.index = val;
-	}
-
-	public clone(): Property {
-		const prop = new EnumProperty(
-			this.name,
-			this.displayName,
-			this.values.slice(0)
-		);
-		prop.index = this.index;
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: EnumProperty) {
-		this.values = prop.values;
-		this.index = prop.index;
-	}
-}
-
-export class ColorProperty extends Property {
-	value: Color;
-	public constructor(name: string, displayName: string, value: Color) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.value = value;
-		this.type = PropertyType.Color;
-	}
-
-	public getValue(): any {
-		return this.value;
-	}
-
-	public setValue(val: any) {
-		// todo: validate
-		//console.log("got color: " + val);
-		if (val instanceof Color) this.value = val;
-		else if (typeof val == "string") this.value = Color.parse(val);
-		else if (typeof val == "object") {
-			//console.log("setting value", val);
-			const value = new Color();
-			value.r = val.r || 0;
-			value.g = val.g || 0;
-			value.b = val.b || 0;
-			value.a = val.a || 1.0;
-
-			this.value = value;
-		}
-	}
-
-	public clone(): Property {
-		const prop = new ColorProperty(this.name, this.displayName, this.value);
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: ColorProperty) {
-		this.setValue(prop.value);
-	}
-}
-
-export class StringProperty extends Property {
-	value: string;
-	isMultiline: boolean;
-	public constructor(
-		name: string,
-		displayName: string,
-		value = "",
-		isMultiline = false
-	) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.value = value;
-		this.type = PropertyType.String;
-		this.isMultiline = isMultiline;
-	}
-
-	public getValue(): any {
-		return this.value;
-	}
-
-	public setValue(val: any) {
-		// todo: validate
-		this.value = val;
-	}
-
-	public clone(): Property {
-		const prop = new StringProperty(this.name, this.displayName, this.value);
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: StringProperty) {
-		this.value = prop.value;
-	}
-}
-
-export class GradientProperty extends Property {
-	value: Gradient;
-	public constructor(name: string, displayName: string, value: Gradient) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.value = value;
-		this.type = PropertyType.Gradient;
-	}
-
-	public getValue(): any {
-		return this.value;
-	}
-
-	public setValue(val: any) {
-		//console.log("setting gradient value");
-		this.value = Gradient.parse(val);
-	}
-
-	public clone(): Property {
-		const prop = new GradientProperty(
-			this.name,
-			this.displayName,
-			this.value.clone()
-		);
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: GradientProperty) {
-		//console.log("copy value from gradient");
-		this.setValue(prop.value.clone());
-	}
-}
-
-export class ImageProperty extends Property {
-	value: Image;
-	public constructor(name: string, displayName: string, value: Image = null) {
-		super();
-		this.name = name;
-		this.displayName = displayName;
-		this.value = value;
-		this.type = PropertyType.Image;
-	}
-
-	public getValue(): any {
-		return this.value;
-	}
-
-	// todo: pass callback for when value update is complete
-	public setValue(val: any, completeCallback: () => void = null) {
-		// todo: validate
-		if (val instanceof Image) {
-			this.value = val;
-			completeCallback();
-		} else {
-			let image = Image.empty();
-			image.deserialize(val, completeCallback);
-			this.value = image;
-		}
-	}
-
-	public clone(): Property {
-		const prop = new ImageProperty(
-			this.name,
-			this.displayName,
-			this.value.clone()
-		);
-
-		return prop;
-	}
-
-	public copyValuesFrom(prop: ImageProperty) {
-		this.value = prop.value.clone();
-	}
-}
diff --git a/src/lib/designer/texturedataconverter.ts b/src/lib/designer/texturedataconverter.ts
deleted file mode 100644
index b8d1d1a2..00000000
--- a/src/lib/designer/texturedataconverter.ts
+++ /dev/null
@@ -1,426 +0,0 @@
-import {
-	compileShader,
-	buildShaderProgram,
-	createTextureWithType,
-	TextureDataType
-} from "./gl";
-
-export enum TextureComponents {
-	RGBA = "RGBA",
-	RGB = "RGB",
-	R = "R",
-	G = "G",
-	B = "B",
-	A = "A"
-}
-
-// to be used mainly to extract pixels from textures
-// to the needed format for export
-export class TextureDataConverter {
-	gl: WebGL2RenderingContext;
-	readFbo: WebGLFramebuffer;
-	shaderProgram: WebGLProgram;
-	texture: WebGLTexture;
-
-	posBuffer: WebGLBuffer;
-	texCoordBuffer: WebGLBuffer;
-
-	constructor(gl: WebGL2RenderingContext) {
-		this.gl = gl;
-		this.readFbo = this.gl.createFramebuffer();
-		this.createVertexBuffers();
-		this.buildShader();
-	}
-
-	getData(
-		sourceTexture: WebGLTexture,
-		width: number,
-		height: number,
-		dataType: TextureDataType,
-		components: TextureComponents = TextureComponents.RGBA,
-		flipY: boolean = false
-	): ArrayBuffer {
-		const gl = this.gl;
-
-		// create textures based on specified data type
-		this.texture = createTextureWithType(this.gl, dataType, width, height);
-
-		// set fbo and bind newly created texture
-		gl.bindFramebuffer(gl.FRAMEBUFFER, this.readFbo);
-		gl.activeTexture(gl.TEXTURE0);
-
-		// NOTE: texture must be in the RGBA format
-		// spec doesn't mandate any other format being supported
-		// https://www.html5gamedevs.com/topic/38191-how-to-use-webgl2-rgb-texture-format/
-		gl.framebufferTexture2D(
-			gl.FRAMEBUFFER,
-			gl.COLOR_ATTACHMENT0,
-			gl.TEXTURE_2D,
-			this.texture,
-			0
-		);
-
-		gl.viewport(0, 0, width, height);
-		gl.disable(gl.DEPTH_TEST);
-		gl.clearColor(0, 0, 0, 1);
-		gl.clear(gl.COLOR_BUFFER_BIT);
-
-		// bind shader
-		gl.useProgram(this.shaderProgram);
-
-		// clear all inputs
-		gl.activeTexture(gl.TEXTURE0);
-		gl.bindTexture(gl.TEXTURE_2D, sourceTexture);
-
-		gl.uniform1i(gl.getUniformLocation(this.shaderProgram, "tex"), 0);
-
-		gl.uniform1i(
-			gl.getUniformLocation(this.shaderProgram, "flipY"),
-			flipY ? 1 : 0
-		);
-
-		// determine which channels the source comes from
-		// 0 - all
-		// 1 - red
-		// 2 - green
-		// 3 - blue
-		// 4 - alpha
-		let outputChannel: number = 0;
-
-		switch (components) {
-			case TextureComponents.R:
-				outputChannel = 1;
-				break;
-			case TextureComponents.G:
-				outputChannel = 2;
-				break;
-			case TextureComponents.B:
-				outputChannel = 3;
-				break;
-			case TextureComponents.A:
-				outputChannel = 4;
-				break;
-		}
-
-		gl.uniform1i(
-			gl.getUniformLocation(this.shaderProgram, "channel"),
-			outputChannel
-		);
-
-		// render texure to fbo
-		const posLoc = gl.getAttribLocation(this.shaderProgram, "a_pos");
-		const texCoordLoc = gl.getAttribLocation(this.shaderProgram, "a_texCoord");
-
-		// provide texture coordinates for the rectangle.
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.posBuffer);
-		gl.enableVertexAttribArray(posLoc);
-		gl.vertexAttribPointer(posLoc, 3, gl.FLOAT, false, 0, 0);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.texCoordBuffer);
-		gl.enableVertexAttribArray(texCoordLoc);
-		gl.vertexAttribPointer(texCoordLoc, 2, gl.FLOAT, false, 0, 0);
-
-		gl.drawArrays(gl.TRIANGLES, 0, 6);
-
-		gl.disableVertexAttribArray(posLoc);
-		gl.disableVertexAttribArray(texCoordLoc);
-
-		// read back pixels
-
-		let readDataType = gl.UNSIGNED_BYTE;
-		let arrayBufferView: ArrayBufferView = null;
-		let arrayBuffer: ArrayBuffer = null;
-
-		let format: number = gl.RGBA;
-		let numComponents: number = 4;
-
-		// commented this out since the format has to be
-		// RGBA. Any other format and WebGL throws an error
-		// switch (components) {
-		// 	case TextureComponents.RGBA:
-		// 		numComponents = 4;
-		// 		format = gl.RGBA;
-		// 		break;
-		// 	case TextureComponents.RGB:
-		// 		numComponents = 3;
-		// 		format = gl.RGB;
-		// 		break;
-		// 	case TextureComponents.R:
-		// 	case TextureComponents.G:
-		// 	case TextureComponents.B:
-		// 	case TextureComponents.A:
-		// 		numComponents = 1;
-		// 		format = gl.RED;
-		// 		break;
-		// }
-
-		switch (dataType) {
-			case TextureDataType.Uint8:
-				readDataType = gl.UNSIGNED_BYTE;
-				arrayBuffer = new ArrayBuffer(width * height * numComponents * 1);
-				arrayBufferView = new Uint8Array(arrayBuffer);
-				break;
-			case TextureDataType.Uint16:
-				readDataType = gl.UNSIGNED_SHORT;
-				arrayBuffer = new ArrayBuffer(width * height * numComponents * 2);
-				arrayBufferView = new Uint16Array(arrayBuffer);
-				break;
-			case TextureDataType.Float16:
-				readDataType = gl.HALF_FLOAT;
-				arrayBuffer = new ArrayBuffer(width * height * numComponents * 2);
-				arrayBufferView = new Uint16Array(arrayBuffer);
-				break;
-			case TextureDataType.Float32:
-				readDataType = gl.FLOAT;
-				arrayBuffer = new ArrayBuffer(width * height * numComponents * 4);
-				arrayBufferView = new Float32Array(arrayBuffer);
-				break;
-		}
-
-		if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) === gl.FRAMEBUFFER_COMPLETE) {
-			gl.readPixels(0, 0, width, height, format, readDataType, arrayBufferView);
-
-			// todo: check for errors in this operation
-			// gl.readPixels(
-			// 	0,
-			// 	0,
-			// 	this.designer.width,
-			// 	this.designer.height,
-			// 	gl.RGBA,
-			// 	gl.HALF_FLOAT,
-			// 	data
-			// );
-		} else {
-			alert("getPixelData: unable to read from FBO");
-		}
-
-		// cleanup
-		gl.enable(gl.DEPTH_TEST);
-		gl.bindFramebuffer(gl.FRAMEBUFFER, null);
-
-		// convert buffer to required format
-		// currently only supports uint8 and uint16
-
-		if (dataType === TextureDataType.Uint8) {
-			if (components === TextureComponents.RGB) {
-				arrayBuffer = rgbaToRgbUint8(arrayBuffer, width, height);
-			} else if (
-				components === TextureComponents.R ||
-				components === TextureComponents.G ||
-				components === TextureComponents.B ||
-				components === TextureComponents.A
-			) {
-				arrayBuffer = rgbaToRUint8(arrayBuffer, width, height);
-			}
-		} else if (dataType === TextureDataType.Uint16) {
-			if (components === TextureComponents.RGB) {
-				arrayBuffer = rgbaToRgbUint16(arrayBuffer, width, height);
-			}
-			if (
-				components === TextureComponents.R ||
-				components === TextureComponents.G ||
-				components === TextureComponents.B ||
-				components === TextureComponents.A
-			) {
-				arrayBuffer = rgbaToRUint16(arrayBuffer, width, height);
-			}
-		}
-
-		return arrayBuffer;
-	}
-
-	createVertexBuffers() {
-		const gl = this.gl;
-		//var texCoordLocation = gl.getAttribLocation(program, "a_texCoord");
-
-		// provide texture coordinates for the rectangle.
-		this.texCoordBuffer = gl.createBuffer();
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.texCoordBuffer);
-		gl.bufferData(
-			gl.ARRAY_BUFFER,
-			new Float32Array([
-				0.0,
-				0.0,
-				1.0,
-				0.0,
-				0.0,
-				1.0,
-				0.0,
-				1.0,
-				1.0,
-				0.0,
-				1.0,
-				1.0
-			]),
-			gl.STATIC_DRAW
-		);
-		//gl.enableVertexAttribArray(texCoordLocation);
-		//gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
-
-		this.posBuffer = gl.createBuffer();
-		gl.bindBuffer(gl.ARRAY_BUFFER, this.posBuffer);
-		gl.bufferData(
-			gl.ARRAY_BUFFER,
-			new Float32Array([
-				-1.0,
-				-1.0,
-				0.0,
-				1.0,
-				-1.0,
-				0.0,
-				-1.0,
-				1.0,
-				0.0,
-				-1.0,
-				1.0,
-				0.0,
-				1.0,
-				-1.0,
-				0.0,
-				1.0,
-				1.0,
-				0.0
-			]),
-			gl.STATIC_DRAW
-		);
-
-		gl.bindBuffer(gl.ARRAY_BUFFER, null);
-	}
-
-	buildShader() {
-		const vertSource = `#version 300 es
-        precision highp float;
-
-        in vec3 a_pos;
-        in vec2 a_texCoord;
-            
-        // the texCoords passed in from the vertex shader.
-        out vec2 v_texCoord;
-            
-        void main() {
-            gl_Position = vec4(a_pos,1.0);
-            v_texCoord = a_texCoord;
-        }`;
-
-		// https://stackoverflow.com/questions/51101023/render-to-16bits-unsigned-integer-2d-texture-in-webgl2
-		// https://stackoverflow.com/questions/27509285/how-to-render-to-a-unsigned-integer-format
-		let fragSource = `#version 300 es
-        precision highp float;
-        in vec2 v_texCoord;
-
-        uniform sampler2D tex;
-        // uniform vec2 _textureSize;
-        uniform bool flipY;
-
-		uniform int channel;
-
-        // out uvec4 fragColor;
-        out vec4 fragColor;
-            
-        void main() {
-            vec2 texCoords = vec2(v_texCoord.x, flipY? 1.0 - v_texCoord.y:v_texCoord.y);
-			vec4 result = texture(tex, texCoords);
-
-			// determine which channels to extract if any
-			switch(channel){
-				// 0 - do nothing
-
-				// red
-				case 1:
-					result = vec4(result.r);
-					break;
-				// green
-				case 2:
-					result = vec4(result.g);
-					break;
-				// blue
-				case 3:
-					result = vec4(result.b);
-					break;
-				// alpha
-				case 4:
-					result = vec4(result.a);
-					break;
-			}
-
-			fragColor = result;
-			// fragColor = vec4(1.0, 0.0, 0.0, 1.0);
-        }
-
-        `;
-
-		this.shaderProgram = buildShaderProgram(this.gl, vertSource, fragSource);
-	}
-}
-
-function rgbaToRgbUint8(
-	buffer: ArrayBuffer,
-	width: number,
-	height: number
-): ArrayBuffer {
-	const totalPixels = width * height;
-	const numComponents = 3;
-	const inputArray: Uint8Array = new Uint8Array(buffer);
-	const outputArray: Uint8Array = new Uint8Array(totalPixels * numComponents);
-
-	for (let i = 0; i < totalPixels; i++) {
-		outputArray[i * numComponents + 0] = inputArray[i * 4 + 0];
-		outputArray[i * numComponents + 1] = inputArray[i * 4 + 1];
-		outputArray[i * numComponents + 2] = inputArray[i * 4 + 2];
-	}
-
-	return outputArray.buffer;
-}
-
-function rgbaToRUint8(
-	buffer: ArrayBuffer,
-	width: number,
-	height: number
-): ArrayBuffer {
-	const totalPixels = width * height;
-	const numComponents = 1;
-	const inputArray: Uint8Array = new Uint8Array(buffer);
-	const outputArray: Uint8Array = new Uint8Array(totalPixels * numComponents);
-
-	for (let i = 0; i < totalPixels; i++) {
-		outputArray[i * numComponents] = inputArray[i * 4];
-	}
-
-	return outputArray.buffer;
-}
-
-function rgbaToRgbUint16(
-	buffer: ArrayBuffer,
-	width: number,
-	height: number
-): ArrayBuffer {
-	const totalPixels = width * height;
-	const numComponents = 3;
-	const inputArray: Uint16Array = new Uint16Array(buffer);
-	const outputArray: Uint16Array = new Uint16Array(totalPixels * numComponents);
-
-	for (let i = 0; i < totalPixels; i++) {
-		outputArray[i * numComponents + 0] = inputArray[i * 4 + 0];
-		outputArray[i * numComponents + 1] = inputArray[i * 4 + 1];
-		outputArray[i * numComponents + 2] = inputArray[i * 4 + 2];
-	}
-
-	return outputArray.buffer;
-}
-
-function rgbaToRUint16(
-	buffer: ArrayBuffer,
-	width: number,
-	height: number
-): ArrayBuffer {
-	const totalPixels = width * height;
-	const numComponents = 1;
-	const inputArray: Uint16Array = new Uint16Array(buffer);
-	const outputArray: Uint16Array = new Uint16Array(totalPixels * numComponents);
-
-	for (let i = 0; i < totalPixels; i++) {
-		outputArray[i * numComponents] = inputArray[i * 4];
-	}
-
-	return outputArray.buffer;
-}
diff --git a/src/lib/editor.ts b/src/lib/editor.ts
deleted file mode 100644
index 22541d6c..00000000
--- a/src/lib/editor.ts
+++ /dev/null
@@ -1,886 +0,0 @@
-//import * as scene from "./scene";
-import { Designer } from "./designer";
-import { DesignerNode } from "./designer/designernode";
-import { Property, PropertyType } from "./designer/properties";
-import { Guid } from "./utils";
-import { DesignerVariableType } from "./designer/designervariable";
-import { DesignerLibrary } from "./designer/library";
-import { NodeScene } from "./scene";
-import { ConnectionGraphicsItem } from "./scene/connectiongraphicsitem";
-import { NodeGraphicsItem } from "./scene/nodegraphicsitem";
-import { SocketType } from "./scene/socketgraphicsitem";
-import { ImageCanvas } from "./designer/imagecanvas";
-
-import {
-	createLibrary,
-	createLibrary as createV1Library
-} from "@/lib/library/libraryv1";
-import { createLibrary as createV2Library } from "@/lib/library/libraryv2";
-import { Color } from "./designer/color";
-import { CommentGraphicsItem } from "./scene/commentgraphicsitem";
-import { FrameGraphicsItem } from "./scene/framegraphicsitem";
-import { NavigationGraphicsItem } from "./scene/navigationgraphicsitem";
-import { ItemClipboard } from "./clipboard";
-import { UndoStack } from "./undostack";
-import { RemoveItemsAction } from "./actions/removeitemsaction";
-
-function hexToRgb(hex) {
-	const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
-	return result
-		? {
-				r: parseInt(result[1], 16),
-				g: parseInt(result[2], 16),
-				b: parseInt(result[3], 16)
-		  }
-		: null;
-}
-
-function rgbToHex(r, g, b) {
-	return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
-}
-
-// stores the IDs for the display nodes
-export class DisplayNodes {
-	public albedoNode: string;
-	public normalNode: string;
-	public roughnessNode: string;
-	public heightNode: string;
-	public metallicNode: string;
-	/*
-    public albedoCanvas : ImageCanvas = new ImageCanvas();
-    public normalCanvas : ImageCanvas = new ImageCanvas();
-    public roughnessCanvas : ImageCanvas = new ImageCanvas();
-    public heightCanvas : ImageCanvas = new ImageCanvas();
-    public metallicCanvas : ImageCanvas = new ImageCanvas();
-
-    resize(width:number, height:number)
-    {
-        this.albedoCanvas.resize(width, height);
-        this.normalCanvas.resize(width, height);
-        this.roughnessCanvas.resize(width, height);
-        this.heightCanvas.resize(width, height);
-        this.metallicCanvas.resize(width, height);
-    }
-    */
-}
-
-export enum DisplayChannel {
-	Albedo,
-	Metallic,
-	Roughness,
-	Normal,
-	Height
-}
-
-export class Editor {
-	static active: Editor;
-
-	canvas: HTMLCanvasElement;
-
-	library: DesignerLibrary;
-	graph: NodeScene;
-	designer: Designer;
-	selectedDesignerNode: DesignerNode;
-
-	undoStack: UndoStack;
-
-	preview2D: HTMLCanvasElement;
-	preview2DCtx: CanvasRenderingContext2D;
-
-	scene3D: any; // todo: set a type
-
-	//   propGen: PropertyGenerator;
-	//   varGen: VariableGenerator;
-	displayNodes: DisplayNodes;
-
-	onnodeselected?: (item: DesignerNode) => void;
-	oncommentselected?: (item: CommentGraphicsItem) => void;
-	onframeselected?: (item: FrameGraphicsItem) => void;
-	onnavigationselected?: (item: NavigationGraphicsItem) => void;
-	onpreviewnode?: (item: DesignerNode, image: HTMLCanvasElement) => void;
-	onlibrarymenu?: () => void;
-
-	textureChannels: Map<string, DesignerNode> = new Map<string, DesignerNode>();
-	ontexturechannelcleared?: (
-		imageCanvas: ImageCanvas,
-		channelName: string
-	) => void;
-	ontexturechannelassigned?: (
-		imageCanvas: ImageCanvas,
-		channelName: string
-	) => void;
-	ontexturechannelupdated?: (
-		imageCanvas: ImageCanvas,
-		channelName: string
-	) => void;
-	onnodetextureupdated?: (node: DesignerNode, timeInMs: number) => void;
-
-	constructor() {
-		this.displayNodes = new DisplayNodes();
-		this.selectedDesignerNode = null;
-		this.undoStack = new UndoStack();
-	}
-
-	getImageWidth() {
-		return this.designer.width;
-	}
-
-	getImageHeight() {
-		return this.designer.height;
-	}
-
-	assignNodeToTextureChannel(nodeId: string, channelName: string) {
-		// only one node can be assigned to a channel
-		if (
-			this.textureChannels.has(channelName) &&
-			this.textureChannels.get(channelName)
-		) {
-			// remove label from node view
-			const oldNode = this.textureChannels.get(channelName);
-			const nodeView = this.graph.getNodeById(oldNode.id);
-			nodeView.clearTextureChannel();
-			//this.textureChannels[channelName] = null;
-			this.textureChannels.delete(channelName);
-
-			if (this.ontexturechannelcleared) {
-				this.ontexturechannelcleared(null, channelName);
-			}
-		}
-
-		const nodeView = this.graph.getNodeById(nodeId);
-		nodeView.setTextureChannel(channelName);
-
-		const newNode = this.designer.getNodeById(nodeId);
-		this.textureChannels.set(channelName, newNode);
-
-		// notify 3d view
-		if (this.ontexturechannelcleared) {
-			this.ontexturechannelassigned(nodeView.imageCanvas, channelName);
-		}
-	}
-
-	clearTextureChannel(nodeId: string) {
-		// eval which channel has this node assigned
-		for (const channelName of this.textureChannels.keys()) {
-			const node = this.textureChannels.get(channelName);
-
-			if (node.id == nodeId) {
-				const oldNode = this.textureChannels.get(channelName);
-				const nodeView = this.graph.getNodeById(oldNode.id);
-
-				// if this function is called when a node is deleted
-				// nodeView will be null
-				if (nodeView) nodeView.clearTextureChannel();
-
-				this.textureChannels.delete(channelName);
-
-				if (this.ontexturechannelcleared) {
-					this.ontexturechannelcleared(null, channelName);
-				}
-			}
-		}
-
-		// only one node can be assigned to a channel
-		// if (this.textureChannels.hasOwnProperty(channelName)) {
-		//   // remove label from node view
-		//   let oldNode = this.textureChannels[channelName] as DesignerNode;
-		//   let nodeView = this.graph.getNodeById(oldNode.id);
-		//   nodeView.clearTextureChannel();
-		//   this.textureChannels[channelName] = null;
-
-		//   if (this.ontexturechannelcleared) {
-		//     this.ontexturechannelcleared(oldNode, channelName);
-		//   }
-		// }
-	}
-
-	hasTextureChannel(channelName: string) {
-		return this.textureChannels.has(channelName);
-	}
-
-	clearTextureChannels() {
-		for (const channelName of this.textureChannels.keys()) {
-			const node = this.textureChannels.get(channelName);
-
-			this.clearTextureChannel(node.id);
-		}
-	}
-
-	getChannelCanvasImage(channelName: string) {
-		if (this.hasTextureChannel(channelName)) {
-			//console.log(this.textureChannels[channelName]);
-			const dnodeId = this.textureChannels.get(channelName).id;
-			const nodeView = this.graph.getNodeById(dnodeId);
-			//console.log(nodeView)
-			//console.log(this.graph)
-			return nodeView.imageCanvas;
-		}
-
-		return null;
-	}
-
-	/*
-    constructor(canvas:HTMLCanvasElement, preview2D:HTMLCanvasElement, propHolder : HTMLElement, varHolder : HTMLElement, scene3D:any)
-    {
-        this.canvas = canvas;
-
-        this.displayNodes = new DisplayNodes();
-
-        this.preview2D = preview2D;
-        this.preview2DCtx = preview2D.getContext("2d");
-
-        this.scene3D = scene3D;
-        this.selectedDesignerNode = null;
-
-        this.propGen = new PropertyGenerator(this, propHolder);
-        this.varGen = new VariableGenerator(this, varHolder);
-        
-
-        //this.setDesigner(new Designer());
-        //this.setScene(new NodeScene(canvas));
-    }
-    */
-
-	undo() {
-		this.undoStack.undo();
-	}
-
-	redo() {
-		this.undoStack.redo();
-	}
-
-	// creates new texture
-	// requires canvas to be already set
-	createNewTexture() {
-		this.clearTextureChannels();
-
-		this.library = createV2Library();
-		this.setDesigner(new Designer());
-		this.setScene(new NodeScene(this.canvas));
-
-		this.setupDefaultScene();
-	}
-
-	setupDefaultScene() {
-		const offset = 100;
-		const spacing = 150;
-
-		// albedo
-		let node = this.library.create("output");
-		let nodeView = this.addNode(node, 0, 0);
-		// figure out why this doesnt work before adding addNode:
-		node.setProperty("name", "albedo");
-		node.setProperty("color", new Color(1, 1, 1, 1));
-		node.setProperty("components", 0);
-		nodeView.setCenter(800, offset + spacing * 0);
-		this.assignNodeToTextureChannel(nodeView.id, "albedo");
-
-		// normal
-		node = this.library.create("output");
-		nodeView = this.addNode(node, 0, 0);
-		node.setProperty("name", "normal");
-		node.setProperty("color", new Color(0.5, 0.5, 1, 1));
-		node.setProperty("components", 1);
-		nodeView.setCenter(800, offset + spacing * 1);
-		this.assignNodeToTextureChannel(nodeView.id, "normal");
-		const normalId = node.id;
-
-		// normal map
-		node = this.library.create("normalmap");
-		nodeView = this.addNode(node, 0, 0);
-		nodeView.setCenter(600, offset + spacing * 1);
-
-		this.graph.createConnection(node.id, normalId, 0);
-
-		// roughness
-		node = this.library.create("output");
-		nodeView = this.addNode(node, 0, 0);
-		node.setProperty("name", "roughness");
-		node.setProperty("color", new Color(0.5, 0.5, 0.5, 1));
-		node.setProperty("components", 2);
-		node.setProperty("precision", 1);
-		nodeView.setCenter(800, offset + spacing * 2);
-		this.assignNodeToTextureChannel(nodeView.id, "roughness");
-
-		// metalness
-		node = this.library.create("output");
-		nodeView = this.addNode(node, 0, 0);
-		node.setProperty("name", "metalness");
-		node.setProperty("color", new Color(0, 0, 0, 1));
-		node.setProperty("components", 2);
-		node.setProperty("precision", 1);
-		nodeView.setCenter(800, offset + spacing * 3);
-		this.assignNodeToTextureChannel(nodeView.id, "metalness");
-
-		// height
-		node = this.library.create("output");
-		nodeView = this.addNode(node, 0, 0);
-		node.setProperty("name", "height");
-		node.setProperty("color", new Color(0, 0, 0, 1));
-		node.setProperty("components", 2);
-		node.setProperty("precision", 1);
-		nodeView.setCenter(800, offset + spacing * 4);
-		this.assignNodeToTextureChannel(nodeView.id, "height");
-
-		// refresh everything
-		this.designer.invalidateAllNodes();
-	}
-
-	set2DPreview(preview2D: HTMLCanvasElement) {
-		this.preview2D = preview2D;
-		this.preview2DCtx = preview2D.getContext("2d");
-	}
-
-	setSceneCanvas(canvas: HTMLCanvasElement) {
-		this.canvas = canvas;
-		this.setScene(new NodeScene(canvas));
-	}
-
-	resizeScene(width: number, height: number) {
-		this.canvas.width = width;
-		this.canvas.height = height;
-	}
-
-	set3DScene(scene3D: any) {
-		this.scene3D = scene3D;
-	}
-
-	setDesigner(designer: Designer) {
-		this.designer = designer;
-		const self = this;
-
-		designer.onnodetextureupdated = function(dnode, dtInMs) {
-			const graphNode = self.graph.getNodeById(dnode.id);
-			if (!graphNode) return; // node could have been deleted
-
-			graphNode.processingTime = dtInMs;
-
-			self.designer.copyNodeTextureToImageCanvas(dnode, graphNode.imageCanvas);
-
-			if (self.onpreviewnode) {
-				if (dnode == self.selectedDesignerNode)
-					self.onpreviewnode(dnode, graphNode.imageCanvas.canvas);
-			}
-
-			if (self.onnodetextureupdated) self.onnodetextureupdated(dnode, dtInMs);
-
-			if (self.ontexturechannelupdated && graphNode.textureChannel) {
-				self.ontexturechannelupdated(
-					graphNode.imageCanvas,
-					graphNode.textureChannel
-				);
-			}
-			// if(node == self.selectedDesignerNode) {
-			//     requestAnimationFrame(function(){
-			//         self.preview2DCtx.clearRect(0,0,self.preview2D.width, self.preview2D.height);
-			//         self.preview2DCtx.drawImage(graphNode.imageCanvas.canvas,
-			//             0,0,
-			//         self.preview2D.width, self.preview2D.height);
-			//     });
-			// }
-
-			self.updateDisplayNode(graphNode);
-		};
-
-		designer.onnodetimeupdated = function(dnode, dtInMs) {
-			const graphNode = self.graph.getNodeById(dnode.id);
-			if (!graphNode) return; // node could have been deleted
-
-			graphNode.processingTime = dtInMs;
-		};
-
-		/*
-        designer.onthumbnailgenerated = function(node, thumb) {
-            console.log(self.selectedDesignerNode);
-            console.log("onthumbnailgenerated generated for: "+node.title);
-            // refresh right node image
-            var graphNode = self.graph.getNodeById(node.id);
-            graphNode.setThumbnail(thumb);
-            self.updateDisplayNode(graphNode);
-
-            if(node == self.selectedDesignerNode) {
-                requestAnimationFrame(function(){
-                    self.preview2DCtx.clearRect(0,0,self.preview2D.width, self.preview2D.height);
-                    self.preview2DCtx.drawImage(thumb,
-                        0,0,
-                    self.preview2D.width, self.preview2D.height);
-                });
-
-                
-            }
-        }
-        */
-
-		//if (this.varGen) this.varGen.setDesigner(designer);
-		//this.propGen.setDesigner(designer);
-	}
-
-	setScene(scene: NodeScene) {
-		// cleanup previous graph
-		if (this.graph) this.graph.dispose();
-
-		// this.undoStack = new UndoStack();
-		this.undoStack.clear();
-
-		// this shouldnt be here
-		// assignment of current undo redo stack should be controlled
-		// by App
-		// UndoStack.current = this.undoStack;
-
-		this.graph = scene;
-
-		const self = this;
-		this.graph.onconnectioncreated = function(con: ConnectionGraphicsItem) {
-			// get node from graph
-			const leftNode = con.socketA.node;
-			const rightNode = con.socketB.node;
-
-			// get node from designer and connect them
-			const leftDNode = self.designer.getNodeById(leftNode.id);
-			const rightDNode = self.designer.getNodeById(rightNode.id);
-
-			// make connection
-			// switch from `title` to `name`
-			self.designer.addConnection(leftDNode, rightDNode, con.socketB.title);
-
-			// refresh right node image
-			//var thumb = self.designer.generateImageFromNode(rightDNode);
-			//rightNode.setThumbnail(thumb);
-		};
-
-		this.graph.onconnectiondestroyed = function(con: ConnectionGraphicsItem) {
-			// get node from graph
-			const leftNode = con.socketA.node;
-			const rightNode = con.socketB.node;
-
-			// get node from designer and connect them
-			const leftDNode = self.designer.getNodeById(leftNode.id);
-			const rightDNode = self.designer.getNodeById(rightNode.id);
-
-			// remove connection
-			// switch from `title` to `name`
-			self.designer.removeConnection(leftDNode, rightDNode, con.socketB.title);
-
-			// clear right node image
-			rightNode.setThumbnail(null);
-		};
-
-		this.graph.onnodeselected = function(node: NodeGraphicsItem) {
-			if (node != null) {
-				var dnode = self.designer.getNodeById(node.id);
-				self.selectedDesignerNode = dnode;
-				//console.log(dnode);
-
-				if (self.preview2DCtx) {
-					self.preview2DCtx.drawImage(
-						node.imageCanvas.canvas,
-						0,
-						0,
-						self.preview2D.width,
-						self.preview2D.height
-					);
-				}
-
-				// todo: move to double click
-				if (self.onpreviewnode) {
-					self.onpreviewnode(dnode, node.imageCanvas.canvas);
-				}
-
-				//console.log(this.scene3D);
-				if (self.scene3D) {
-					//console.log("setting height texture");
-					//self.scene3D.setHeightTexture(node.thumbnail);
-					self.updateDisplayNode(node);
-				}
-			}
-
-			if (self.onnodeselected) self.onnodeselected(dnode);
-		};
-
-		this.graph.oncommentselected = function(item: CommentGraphicsItem) {
-			if (self.oncommentselected) self.oncommentselected(item);
-		};
-
-		this.graph.onframeselected = function(item: FrameGraphicsItem) {
-			if (self.onframeselected) self.onframeselected(item);
-		};
-
-		this.graph.onnavigationselected = function(item: NavigationGraphicsItem) {
-			if (self.onnavigationselected) self.onnavigationselected(item);
-		};
-
-		this.graph.onnodedeleted = function(node: NodeGraphicsItem) {
-			// remove node from channels
-			//console.log(self);
-			self.clearTextureChannel(node.id);
-
-			self.designer.removeNode(node.id);
-
-			if (self.onpreviewnode) {
-				self.onpreviewnode(null, null);
-			}
-		};
-
-		this.graph.onitemsdeleting = function(
-			frames: FrameGraphicsItem[],
-			comments: CommentGraphicsItem[],
-			navs: NavigationGraphicsItem[],
-			cons: ConnectionGraphicsItem[],
-			nodes: NodeGraphicsItem[]
-		) {
-			const dnodes: DesignerNode[] = [];
-			for (const node of nodes) {
-				const dnode = self.designer.getNodeById(node.id);
-
-				// should never happen!
-				if (dnode == null) throw "Node with id " + dnode.id + " doesnt exist!!";
-
-				dnodes.push(dnode);
-			}
-
-			const action = new RemoveItemsAction(
-				self,
-				self.graph,
-				self.designer,
-				frames,
-				comments,
-				navs,
-				cons,
-				nodes,
-				dnodes
-			);
-			UndoStack.current.push(action);
-		};
-
-		this.graph.onitemsdeleted = function(
-			frames: FrameGraphicsItem[],
-			comments: CommentGraphicsItem[],
-			navs: NavigationGraphicsItem[],
-			cons: ConnectionGraphicsItem[],
-			nodes: NodeGraphicsItem[]
-		) {
-			if (self.onpreviewnode) {
-				self.onpreviewnode(null, null);
-			}
-		};
-
-		this.graph.oncopy = function(evt: ClipboardEvent) {
-			self.executeCopy(evt);
-		};
-
-		this.graph.oncut = function(evt: ClipboardEvent) {
-			self.executeCut(evt);
-		};
-
-		this.graph.onpaste = function(evt: ClipboardEvent) {
-			self.executePaste(evt);
-		};
-
-		this.graph.onlibrarymenu = function() {
-			if (self.onlibrarymenu != null) {
-				self.onlibrarymenu();
-			}
-		};
-
-		// property changes
-		/*
-        this.propGen.onnodepropertychanged = function(dnode:DesignerNode, prop:Property) {
-            //var node = self.graph.getNodeById(node.id);
-            //self.graph.refreshNode()
-            
-            // todo: do this properly
-            var thumb = self.designer.generateImageFromNode(dnode);
-            var node = self.graph.getNodeById(dnode.id);
-            node.thumbnail = thumb;
-
-            //console.log(node.thumbnail);
-            requestAnimationFrame(function(){
-                self.preview2DCtx.clearRect(0,0,self.preview2D.width, self.preview2D.height);
-                self.preview2DCtx.drawImage(thumb,
-                    0,0,
-                self.preview2D.width, self.preview2D.height);
-            });
-            
-            // just a stest
-            //self.scene3D.setHeightTexture(node.thumbnail);
-            self.updateDisplayNode(node);
-        }
-        */
-	}
-
-	executeCopy(evt: ClipboardEvent) {
-		ItemClipboard.copyItems(
-			this.designer,
-			this.library,
-			this.graph,
-			evt.clipboardData
-		);
-	}
-
-	executeCut(evt: ClipboardEvent) {
-		ItemClipboard.copyItems(
-			this.designer,
-			this.library,
-			this.graph,
-			evt.clipboardData
-		);
-	}
-
-	executePaste(evt: ClipboardEvent) {
-		ItemClipboard.pasteItems(
-			this.designer,
-			this.library,
-			this.graph,
-			evt.clipboardData
-		);
-	}
-
-	// adds node
-	// x and y are screen space
-	addNode(dNode: DesignerNode, screenX = 0, screenY = 0): NodeGraphicsItem {
-		// must add to designer first
-		this.designer.addNode(dNode);
-
-		// create node from designer
-		const node = new NodeGraphicsItem(dNode.title);
-		for (const input of dNode.getInputs()) {
-			node.addSocket(input, input, SocketType.In);
-		}
-		node.addSocket("output", "output", SocketType.Out);
-		this.graph.addNode(node);
-		node.id = dNode.id;
-
-		// generate thumbnail
-		const thumb = this.designer.generateImageFromNode(dNode);
-		node.setThumbnail(thumb);
-
-		const pos = this.graph.view.canvasToSceneXY(screenX, screenY);
-		node.setCenter(pos.x, pos.y);
-
-		return node;
-	}
-
-	createComment(): CommentGraphicsItem {
-		const comment = new CommentGraphicsItem(this.graph.view);
-		const pos = this.graph.view.sceneCenter;
-		comment.setCenter(pos.x, pos.y);
-
-		this.graph.addComment(comment);
-
-		return comment;
-	}
-
-	createFrame(): FrameGraphicsItem {
-		const frame = new FrameGraphicsItem(this.graph.view);
-		const pos = this.graph.view.sceneCenter;
-		frame.setCenter(pos.x, pos.y);
-
-		this.graph.addFrame(frame);
-
-		return frame;
-	}
-
-	createNavigation(): NavigationGraphicsItem {
-		const nav = new NavigationGraphicsItem();
-		const pos = this.graph.view.sceneCenter;
-		nav.setCenter(pos.x, pos.y);
-
-		this.graph.addNavigation(nav);
-
-		return nav;
-	}
-
-	// DISPLAY NODE FUNCTIONS
-
-	// updates appropriate image if set
-	updateDisplayNode(node: NodeGraphicsItem) {
-		if (!this.scene3D) return;
-
-		//console.log(node.id);
-		//console.log(this.displayNodes.normalNode);
-
-		// TODO: create custom CanvasImage that resizes with
-		// the texture size. NodeGraphicsItem's CanvasImage is fixed
-		// to 1024x1024. Another option is to give each DesignerNode a
-		// CanvasImage that updates when its texture updates then pass
-		// it to NodeGraphicsitem. That way it gets used one place and
-		// gets updated everywhere else all at once.
-		if (node.id == this.displayNodes.albedoNode) {
-			//this.scene3D.setAlbedoTexture(node.thumbnail);
-			this.scene3D.setAlbedoCanvasTexture(node.imageCanvas.canvas);
-		}
-
-		if (node.id == this.displayNodes.metallicNode) {
-			//this.scene3D.setMetallicTexture(node.thumbnail);
-			this.scene3D.setMetallicCanvasTexture(node.imageCanvas.canvas);
-		}
-
-		if (node.id == this.displayNodes.normalNode) {
-			//this.scene3D.setNormalTexture(node.thumbnail);
-			this.scene3D.setNormalCanvasTexture(node.imageCanvas.canvas);
-		}
-
-		if (node.id == this.displayNodes.roughnessNode) {
-			//this.scene3D.setRoughnessTexture(node.thumbnail);
-			this.scene3D.setRoughnessCanvasTexture(node.imageCanvas.canvas);
-		}
-
-		if (node.id == this.displayNodes.heightNode) {
-			//this.scene3D.setHeightTexture(node.thumbnail);
-			this.scene3D.setHeightCanvasTexture(node.imageCanvas.canvas);
-		}
-	}
-
-	setDisplayChannelNode(channel: DisplayChannel, nodeId: string) {
-		const node = this.graph.getNodeById(nodeId);
-		if (channel == DisplayChannel.Albedo) {
-			this.displayNodes.albedoNode = nodeId;
-		}
-		if (channel == DisplayChannel.Metallic) {
-			this.displayNodes.metallicNode = nodeId;
-		}
-		if (channel == DisplayChannel.Normal) {
-			this.displayNodes.normalNode = nodeId;
-		}
-		if (channel == DisplayChannel.Roughness) {
-			this.displayNodes.roughnessNode = nodeId;
-		}
-		if (channel == DisplayChannel.Height) {
-			this.displayNodes.heightNode = nodeId;
-		}
-
-		this.updateDisplayNode(node);
-	}
-
-	exposeVariable(node: DesignerNode, prop: Property, varDisplayName: string) {
-		// create new variable
-		const varName = Guid.newGuid();
-		const dvar = this.designer.addVariable(
-			varName,
-			varDisplayName,
-			this.evalDesignerVariableType(prop)
-		);
-		// copy over important props
-		// todo:make more elegant
-		dvar.property = prop.clone();
-		dvar.property.name = varName;
-		dvar.property.displayName = varDisplayName;
-
-		// add it to scene and bind prop
-		this.designer.mapNodePropertyToVariable(varName, node, prop.name);
-
-		// copy property props
-
-		// refresh var ui
-		// this.varGen.refreshUi();
-	}
-
-	evalDesignerVariableType(prop: Property): DesignerVariableType {
-		if (prop.type == PropertyType.Float) {
-			return DesignerVariableType.Float;
-		} else if (prop.type == PropertyType.Int) {
-			return DesignerVariableType.Int;
-		} else if (prop.type == PropertyType.Bool) {
-			return DesignerVariableType.Bool;
-		} else if (prop.type == PropertyType.Enum) {
-			return DesignerVariableType.Enum;
-		} else if (prop.type == PropertyType.Color) {
-			return DesignerVariableType.Color;
-		} else {
-			console.log("error: invalid property type for variable", prop);
-		}
-
-		return null;
-	}
-
-	update() {
-		if (this.designer) this.designer.update();
-	}
-
-	draw() {
-		if (this.graph) this.graph.draw();
-	}
-
-	load(data: any) {
-		// clear texture channels
-		this.clearTextureChannels();
-
-		let library;
-		if (!data["libraryVersion"]) {
-			library = createV2Library();
-		} else {
-			let libVer = data["libraryVersion"];
-			if (libVer === "v0") library = createLibrary();
-			if (libVer === "v1")
-				// silently load v1 textures as v2
-				library = createV2Library();
-			else if (libVer === "v2") library = createV2Library();
-			else
-				console.error(
-					`Invalid library version ${libVer}, project might not load properly`
-				);
-		}
-		// load scene
-		const d = Designer.load(data, library);
-		// copy over relevant props
-		if (this.designer) d.setUpdateMode(this.designer.updateMode);
-
-		// load graph
-		const g = NodeScene.load(d, data["scene"], this.canvas);
-
-		//todo: properly destroy existing graph
-
-		//this.designer = d;
-		//this.graph = g;
-		this.library = library;
-		this.setDesigner(d);
-		this.setScene(g);
-
-		// assign each node to it's texture channel
-		// it's expected at this point that the 3d preview should already
-		// have the texturechannel callbacks assigned
-
-		// load editor data
-		if (data["editor"] != null) {
-			const e = data["editor"];
-			// console.log("loading editor data");
-			// console.log(e.displayNodes);
-
-			// this.displayNodes.albedoNode = e.displayNodes.albedoNode;
-			// this.displayNodes.metallicNode = e.displayNodes.metallicNode;
-			// this.displayNodes.normalNode = e.displayNodes.normalNode;
-			// this.displayNodes.roughnessNode = e.displayNodes.roughnessNode;
-			// this.displayNodes.heightNode = e.displayNodes.heightNode;
-
-			for (const channelName in e.textureChannels) {
-				if (!e.textureChannels.hasOwnProperty(channelName)) continue;
-				// console.log(e);
-				const node = this.graph.getNodeById(e.textureChannels[channelName]);
-				if (node) this.assignNodeToTextureChannel(node.id, channelName);
-			}
-
-			//this.textureChannels = e.textureChannels || {};
-			//console.log(this.textureChannels)
-		}
-	}
-
-	save(): any {
-		const data = this.designer.save();
-		data["scene"] = this.graph.save();
-
-		const textureChannels = {};
-		for (const channelName of this.textureChannels.keys()) {
-			textureChannels[channelName] = this.textureChannels.get(channelName).id;
-		}
-
-		data["editor"] = {
-			//displayNodes: this.displayNodes,
-			textureChannels: textureChannels
-		};
-
-		data["libraryVersion"] = this.library.getVersionName();
-		//data["libraryVersion"] = "v1";
-
-		return data;
-	}
-}
diff --git a/src/lib/export/unityexporter.js b/src/lib/export/unityexporter.js
deleted file mode 100644
index f8de194f..00000000
--- a/src/lib/export/unityexporter.js
+++ /dev/null
@@ -1,657 +0,0 @@
-/*
-NOTES:
-- _BumpMap is the normal map if then _NORMALMAP keyword is uses
-    the normal map needs to be inverted to work in unity
-- _METALLICGLOSSMAP keyword means the gloss map is in the alpha channel of the metallic map
-    the gloss map is the inverse of the roughness map
-    both metallic and gloss maps have to be combined into a single texture
-    generate metallic of 0 if no metallic map is specified but a glossmap is
-- _ParallaxMap is the height map and keyword _PARALLAXMAP is needed to enable it
-*/
-import JSZip from "jszip";
-
-const keyWords = "_METALLICGLOSSMAP _NORMALMAP";
-
-const materialTemplate = `%YAML 1.1
-%TAG !u! tag:unity3d.com,2011:
---- !u!21 &2100000
-Material:
-    serializedVersion: 6
-    m_ObjectHideFlags: 0
-    m_PrefabParentObject: {fileID: 0}
-    m_PrefabInternal: {fileID: 0}
-    m_Name: {{name}}
-    m_Shader: {fileID: 46, guid: 0000000000000000f000000000000000, type: 0}
-    m_ShaderKeywords: {{keywords}}
-    m_LightmapFlags: 4
-    m_EnableInstancingVariants: 0
-    m_DoubleSidedGI: 0
-    m_CustomRenderQueue: -1
-    stringTagMap: {}
-    disabledShaderPasses: []
-    m_SavedProperties:
-      serializedVersion: 3
-      m_TexEnvs:
-      - _BumpMap:
-          {{normal_tex}}
-      - _DetailAlbedoMap:
-          m_Texture: {fileID: 0}
-          m_Scale: {x: 1, y: 1}
-          m_Offset: {x: 0, y: 0}
-      - _DetailMask:
-          m_Texture: {fileID: 0}
-          m_Scale: {x: 1, y: 1}
-          m_Offset: {x: 0, y: 0}
-      - _DetailNormalMap:
-          m_Texture: {fileID: 0}
-          m_Scale: {x: 1, y: 1}
-          m_Offset: {x: 0, y: 0}
-      - _EmissionMap:
-          m_Texture: {fileID: 0}
-          m_Scale: {x: 4, y: 4}
-          m_Offset: {x: 0, y: 0}
-      - _MainTex:
-          {{albedo_tex}}
-      - _MetallicGlossMap:
-          {{metallicgloss_tex}}
-      - _OcclusionMap:
-          m_Texture: {fileID: 0}
-          m_Scale: {x: 1, y: 1}
-          m_Offset: {x: 0, y: 0}
-      - _ParallaxMap:
-          m_Texture: {fileID: 0}
-          m_Scale: {x: 1, y: 1}
-          m_Offset: {x: 0, y: 0}
-      m_Floats:
-      - _BumpScale: 1
-      - _Cutoff: 0.5
-      - _DetailNormalMapScale: 1
-      - _DstBlend: 0
-      - _GlossMapScale: 1
-      - _Glossiness: 0.5
-      - _GlossyReflections: 1
-      - _Metallic: 0
-      - _Mode: 0
-      - _OcclusionStrength: 1
-      - _Parallax: 0.02
-      - _SmoothnessTextureChannel: 0
-      - _SpecularHighlights: 1
-      - _SrcBlend: 1
-      - _UVSec: 0
-      - _ZWrite: 1
-      m_Colors:
-      - _Color: {r: 1, g: 1, b: 1, a: 1}
-      - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
-`;
-
-const materialMetaTemplate = `fileFormatVersion: 2
-guid: {{material_guid}}
-NativeFormatImporter:
-    externalObjects: {}
-    mainObjectFileID: 2100000
-    userData: 
-    assetBundleName: 
-    assetBundleVariant: 
-`;
-
-const textureMetaTemplate = `fileFormatVersion: 2
-guid: {{texture_guid}}
-TextureImporter:
-  fileIDToRecycleName: {}
-  externalObjects: {}
-  serializedVersion: 5
-  mipmaps:
-    mipMapMode: 0
-    enableMipMap: 1
-    sRGBTexture: 1
-    linearTexture: 0
-    fadeOut: 0
-    borderMipMap: 0
-    mipMapsPreserveCoverage: 0
-    alphaTestReferenceValue: 0.5
-    mipMapFadeDistanceStart: 1
-    mipMapFadeDistanceEnd: 3
-  bumpmap:
-    convertToNormalMap: 0
-    externalNormalMap: 0
-    heightScale: 0.25
-    normalMapFilter: 0
-  isReadable: 0
-  grayScaleToAlpha: 0
-  generateCubemap: 6
-  cubemapConvolution: 0
-  seamlessCubemap: 0
-  textureFormat: 1
-  maxTextureSize: 2048
-  textureSettings:
-    serializedVersion: 2
-    filterMode: -1
-    aniso: 16
-    mipBias: -1
-    wrapU: -1
-    wrapV: -1
-    wrapW: -1
-  nPOTScale: 1
-  lightmap: 0
-  compressionQuality: 50
-  spriteMode: 0
-  spriteExtrude: 1
-  spriteMeshType: 1
-  alignment: 0
-  spritePivot: {x: 0.5, y: 0.5}
-  spritePixelsToUnits: 100
-  spriteBorder: {x: 0, y: 0, z: 0, w: 0}
-  spriteGenerateFallbackPhysicsShape: 1
-  alphaUsage: 1
-  alphaIsTransparency: 0
-  spriteTessellationDetail: -1
-  textureType: {{type}}
-  textureShape: 1
-  singleChannelComponent: 0
-  maxTextureSizeSet: 0
-  compressionQualitySet: 0
-  textureFormatSet: 0
-  platformSettings:
-  - serializedVersion: 2
-    buildTarget: DefaultTexturePlatform
-    maxTextureSize: 2048
-    resizeAlgorithm: 0
-    textureFormat: -1
-    textureCompression: 1
-    compressionQuality: 50
-    crunchedCompression: 0
-    allowsAlphaSplitting: 0
-    overridden: 0
-    androidETC2FallbackOverride: 0
-  - serializedVersion: 2
-    buildTarget: Standalone
-    maxTextureSize: 2048
-    resizeAlgorithm: 0
-    textureFormat: -1
-    textureCompression: 1
-    compressionQuality: 50
-    crunchedCompression: 0
-    allowsAlphaSplitting: 0
-    overridden: 0
-    androidETC2FallbackOverride: 0
-  - serializedVersion: 2
-    buildTarget: Android
-    maxTextureSize: 2048
-    resizeAlgorithm: 0
-    textureFormat: -1
-    textureCompression: 1
-    compressionQuality: 50
-    crunchedCompression: 0
-    allowsAlphaSplitting: 0
-    overridden: 0
-    androidETC2FallbackOverride: 0
-  - serializedVersion: 2
-    buildTarget: WebGL
-    maxTextureSize: 2048
-    resizeAlgorithm: 0
-    textureFormat: -1
-    textureCompression: 1
-    compressionQuality: 50
-    crunchedCompression: 0
-    allowsAlphaSplitting: 0
-    overridden: 0
-    androidETC2FallbackOverride: 0
-  spriteSheet:
-    serializedVersion: 2
-    sprites: []
-    outline: []
-    physicsShape: []
-    bones: []
-    spriteID: 
-    vertices: []
-    indices: 
-    edges: []
-    weights: []
-  spritePackingTag: 
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
-`;
-
-const TextureType = {
-	Default: 0,
-	NormalMap: 1
-};
-
-const matNullTexTemp = `m_Texture: {fileID: 0}
-        m_Scale: {x: 1, y: 1}
-        m_Offset: {x: 0, y: 0}`;
-
-const matTexTemp = `m_Texture: {fileID: 2800000, guid: {{guid}}, type: 3}
-        m_Scale: {x: {{repeatx}}, y: {{repeaty}}}
-        m_Offset: {x: 0, y: 0}`;
-
-const exporter = {
-	canvas: null,
-	gl: null,
-	posBuffer: null,
-	texCoordBuffer: null,
-
-	// shaders
-	metalGlossProgram: null,
-	normalProgram: null
-};
-
-export function unityExport(editor, materialName) {
-	const zip = new JSZip();
-
-	// todo : filter name, might have illegal characters
-	//var materialName = saveData.name;
-
-	const matData = {
-		name: materialName,
-		keywords: "",
-		albedo_tex: matNullTexTemp,
-		metallicgloss_tex: matNullTexTemp,
-		normal_tex: matNullTexTemp,
-		height_tex: matNullTexTemp
-	};
-
-	// write texture first
-	if (editor.hasTextureChannel("albedo")) {
-		const albedoGuid = newGuid();
-		zip.file(
-			albedoGuid + "/asset",
-			canvasToBase64(editor.getChannelCanvasImage("albedo").canvas),
-			{ base64: true }
-		);
-		zip.file(
-			albedoGuid + "/asset.meta",
-			template(textureMetaTemplate, {
-				texture_guid: albedoGuid,
-				type: TextureType.Default
-			})
-		);
-		zip.file(
-			albedoGuid + "/pathname",
-			"Assets/" + materialName + "/Albedo.png"
-		);
-
-		matData.albedo_tex = template(matTexTemp, {
-			guid: albedoGuid,
-			repeatx: 1,
-			repeaty: 1
-		});
-	}
-
-	if (editor.hasTextureChannel("normal")) {
-		const guid = newGuid();
-
-		const normalCanvas = editor.getChannelCanvasImage("normal");
-		exporter.canvas.width = normalCanvas.width();
-		exporter.canvas.height = normalCanvas.height();
-
-		fixNormalMap(exporter, normalCanvas.createTexture(exporter.gl));
-		zip.file(guid + "/asset", canvasToBase64(exporter.canvas), {
-			base64: true
-		});
-		zip.file(
-			guid + "/asset.meta",
-			template(textureMetaTemplate, {
-				texture_guid: guid,
-				type: TextureType.NormalMap
-			})
-		);
-		zip.file(guid + "/pathname", "Assets/" + materialName + "/Normal.png");
-
-		matData.normal_tex = template(matTexTemp, {
-			guid: guid,
-			repeatx: 1,
-			repeaty: 1
-		});
-	}
-
-	if (
-		editor.hasTextureChannel("metalness") ||
-		editor.hasTextureChannel("roughness")
-	) {
-		const guid = newGuid();
-
-		//var normalCanvas = viewer.normalCanvas;
-		// resize canvas
-		// todo: figure out how to derive canvas size
-		exporter.canvas.width = editor.getImageWidth();
-		exporter.canvas.height = editor.getImageHeight();
-
-		let mTex = null;
-		if (editor.hasTextureChannel("metalness"))
-			mTex = editor
-				.getChannelCanvasImage("metalness")
-				.createTexture(exporter.gl);
-
-		let rTex = null;
-		if (editor.hasTextureChannel("roughness"))
-			rTex = editor
-				.getChannelCanvasImage("roughness")
-				.createTexture(exporter.gl);
-
-		generateMetallicGloss(exporter, mTex, rTex);
-		zip.file(guid + "/asset", canvasToBase64(exporter.canvas), {
-			base64: true
-		});
-		zip.file(
-			guid + "/asset.meta",
-			template(textureMetaTemplate, {
-				texture_guid: guid,
-				type: TextureType.Default
-			})
-		);
-		zip.file(
-			guid + "/pathname",
-			"Assets/" + materialName + "/MetallicGloss.png"
-		);
-
-		matData.metallicgloss_tex = template(matTexTemp, {
-			guid: guid,
-			repeatx: 1,
-			repeaty: 1
-		});
-	}
-
-	// NOTE: Unity has the metallic and glossy fields in one texture (glossiness being the alpha channel)
-	// glosiness is the inverse of the roughness map
-
-	// write material last
-	const matGuid = newGuid();
-	/*
-        zip.file(matGuid+"/asset",template(materialTemplate,{
-            keywords:"",
-            albedo_guid:albedoGuid
-        }));
-        */
-	zip.file(matGuid + "/asset", template(materialTemplate, matData));
-	zip.file(
-		matGuid + "/asset.meta",
-		template(materialMetaTemplate, { material_guid: matGuid })
-	);
-	zip.file(
-		matGuid + "/pathname",
-		"Assets/" + materialName + "/" + materialName + ".mat"
-	);
-	//zip.file(matGuid+"/asset","");//preview
-	zip.file(matGuid + "/asset", template(materialTemplate, matData));
-	zip.file(
-		matGuid + "/asset.meta",
-		template(materialMetaTemplate, { material_guid: matGuid })
-	);
-	zip.file(
-		matGuid + "/pathname",
-		"Assets/" + materialName + "/" + materialName + ".mat"
-	);
-
-	return zip.generateAsync({ type: "nodebuffer" });
-}
-
-function newGuid() {
-	return "xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx".replace(/[xy]/g, function(c) {
-		const r = (Math.random() * 16) | 0,
-			v = c == "x" ? r : (r & 0x3) | 0x8;
-		return v.toString(16);
-	});
-}
-
-function template(str, data) {
-	let res = str;
-	for (const name in data) {
-		res = res.replace("{{" + name + "}}", data[name]);
-	}
-
-	return res;
-}
-
-// merges metallic and inverted roughness map
-// uses a metallic of 0 if no metallic map is provided
-// sets glosiness to 0 by default
-function generateMetallicGloss(exporter, mTex, rTex) {
-	renderToImage(exporter, exporter.metalGlossProgram, [
-		{ name: "u_metallicMap", tex: mTex },
-		{ name: "u_roughnessMap", tex: rTex }
-	]);
-}
-
-// inverts normal map
-function fixNormalMap(exporter, tex) {
-	renderToImage(exporter, exporter.normalProgram, [
-		{ name: "u_normalMap", tex: tex }
-	]);
-}
-
-const DEFAULT_VERT = `precision mediump float;
-    
-    attribute vec3 a_pos;
-    attribute vec2 a_texCoord;
-        
-    // the texCoords passed in from the vertex shader.
-    varying vec2 v_texCoord;
-        
-    void main() {
-        gl_Position = vec4(a_pos,1.0);
-        v_texCoord = a_texCoord;
-    }`;
-
-const NORMAl_FRAG = `precision mediump float;
-    varying vec2 v_texCoord;
-    uniform sampler2D u_normalMap;
-        
-    void main() {
-        vec4 norm = texture2D(u_normalMap,vec2(v_texCoord.x, 1.0 - v_texCoord.y));
-        norm.z = 1.0 - norm.z;
-        gl_FragColor = norm;
-    }`;
-
-const METALLICGLOSS_FRAG = `precision mediump float;
-    varying vec2 v_texCoord;
-    uniform sampler2D u_metallicMap;
-    uniform bool u_metallicMapEnabled;
-    uniform sampler2D u_roughnessMap;
-    uniform bool u_roughnessMapEnabled;
-        
-    void main() {
-        vec2 texCoord = vec2(v_texCoord.x, 1.0 - v_texCoord.y);
-        float metal = 0.0;
-        if (u_metallicMapEnabled)
-             metal = texture2D(u_metallicMap,texCoord).r;
-    
-        
-        float gloss = 0.0;
-        if (u_roughnessMapEnabled)
-            gloss = 1.0 - texture2D(u_roughnessMap,texCoord).r;
-    
-        gl_FragColor = vec4(vec3(metal), gloss);
-    }`;
-
-// creates canvas and context
-// creates shaders for converting the the textures
-function initGLAndResources(exporter) {
-	const canvas = document.createElement("canvas");
-	const gl = canvas.getContext("webgl");
-
-	exporter.canvas = canvas;
-	exporter.gl = gl;
-
-	exporter.metalGlossProgram = buildShaderProgram(
-		gl,
-		DEFAULT_VERT,
-		METALLICGLOSS_FRAG
-	);
-	exporter.normalProgram = buildShaderProgram(gl, DEFAULT_VERT, NORMAl_FRAG);
-
-	createVertexBuffers(exporter);
-}
-
-function getShaderSource(id) {
-	const shaderScript = document.getElementById(id);
-	if (!shaderScript) {
-		return null;
-	}
-
-	let str = "";
-	let k = shaderScript.firstChild;
-	while (k) {
-		if (k.nodeType == 3) {
-			str += k.textContent;
-		}
-		k = k.nextSibling;
-	}
-
-	return str;
-}
-
-function compileShader(gl, source, shaderType) {
-	const shader = gl.createShader(shaderType);
-
-	gl.shaderSource(shader, source);
-	gl.compileShader(shader);
-
-	if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
-		alert(gl.getShaderInfoLog(shader));
-		return null;
-	}
-
-	return shader;
-}
-
-function buildShaderProgram(gl, vertSource, fragSource) {
-	const vertexShader = compileShader(gl, vertSource, gl.VERTEX_SHADER);
-	const fragmentShader = compileShader(gl, fragSource, gl.FRAGMENT_SHADER);
-
-	const shaderProgram = gl.createProgram();
-	gl.attachShader(shaderProgram, vertexShader);
-	gl.attachShader(shaderProgram, fragmentShader);
-	gl.linkProgram(shaderProgram);
-
-	if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
-		alert("Could not initialise shaders");
-	}
-
-	gl.useProgram(shaderProgram);
-
-	return shaderProgram;
-}
-
-//var texCoordBuffer = new WebGLBuffer;
-//var posBuffer = new WebGLBuffer;
-
-// render quad using shader and texture inputs
-// returns HtmlImageElement
-function renderToImage(exporter, program, inputs) {
-	const gl = exporter.gl;
-
-	gl.viewport(0, 0, exporter.canvas.width, exporter.canvas.height);
-
-	// bind texture to fbo
-	//gl.clearColor(0,0,1,1);
-	gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
-
-	// bind shader
-	gl.useProgram(program);
-
-	// pass textures
-	let texIndex = 0;
-	for (const i in inputs) {
-		const input = inputs[i];
-		if (input.tex) {
-			gl.activeTexture(gl.TEXTURE0 + texIndex);
-			gl.bindTexture(gl.TEXTURE_2D, input.tex);
-			gl.uniform1i(gl.getUniformLocation(program, input.name), texIndex);
-			gl.uniform1i(gl.getUniformLocation(program, input.name + "Enabled"), 1);
-		} else {
-			gl.uniform1i(gl.getUniformLocation(program, input.name + "Enabled"), 0);
-		}
-		texIndex++;
-	}
-
-	// bind mesh
-	const posLoc = gl.getAttribLocation(program, "a_pos");
-	const texCoordLoc = gl.getAttribLocation(program, "a_texCoord");
-
-	// provide texture coordinates for the rectangle.
-	gl.bindBuffer(gl.ARRAY_BUFFER, exporter.posBuffer);
-	gl.enableVertexAttribArray(posLoc);
-	gl.vertexAttribPointer(posLoc, 3, gl.FLOAT, false, 0, 0);
-
-	gl.bindBuffer(gl.ARRAY_BUFFER, exporter.texCoordBuffer);
-	gl.enableVertexAttribArray(texCoordLoc);
-	gl.vertexAttribPointer(texCoordLoc, 2, gl.FLOAT, false, 0, 0);
-
-	gl.drawArrays(gl.TRIANGLES, 0, 6);
-
-	gl.disableVertexAttribArray(posLoc);
-	gl.disableVertexAttribArray(texCoordLoc);
-}
-
-function createVertexBuffers(exporter) {
-	const gl = exporter.gl;
-
-	// provide texture coordinates for the rectangle.
-	const texCoordBuffer = gl.createBuffer();
-	gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
-	gl.bufferData(
-		gl.ARRAY_BUFFER,
-		new Float32Array([
-			0.0,
-			0.0,
-			1.0,
-			0.0,
-			0.0,
-			1.0,
-			0.0,
-			1.0,
-			1.0,
-			0.0,
-			1.0,
-			1.0
-		]),
-		gl.STATIC_DRAW
-	);
-
-	const posBuffer = gl.createBuffer();
-	gl.bindBuffer(gl.ARRAY_BUFFER, posBuffer);
-	gl.bufferData(
-		gl.ARRAY_BUFFER,
-		new Float32Array([
-			-1.0,
-			-1.0,
-			0.0,
-			1.0,
-			-1.0,
-			0.0,
-			-1.0,
-			1.0,
-			0.0,
-			-1.0,
-			1.0,
-			0.0,
-			1.0,
-			-1.0,
-			0.0,
-			1.0,
-			1.0,
-			0.0
-		]),
-		gl.STATIC_DRAW
-	);
-
-	gl.bindBuffer(gl.ARRAY_BUFFER, null);
-
-	exporter.texCoordBuffer = texCoordBuffer;
-	exporter.posBuffer = posBuffer;
-}
-
-function canvasToBase64(canvas) {
-	let data = canvas.toDataURL();
-	// todo: maybe script header?
-	// https://code-examples.net/en/q/6f412f
-	data = data.replace(/^data:image\/(png|jpg);base64,/, "");
-	return data;
-}
-
-// todo: cleanup textures!!
-
-// initialize
-initGLAndResources(exporter);
diff --git a/src/lib/export/unityzipexporter.js b/src/lib/export/unityzipexporter.js
deleted file mode 100644
index 8565ab4e..00000000
--- a/src/lib/export/unityzipexporter.js
+++ /dev/null
@@ -1,338 +0,0 @@
-/*
-NOTES:
-Unity's mettalic and gloss maps are in one texture.
-*/
-import AdmZip from "adm-zip";
-import electron from "electron";
-
-const TextureType = {
-	Default: 0,
-	NormalMap: 1
-};
-
-const exporter = {
-	canvas: null,
-	gl: null,
-	posBuffer: null,
-	texCoordBuffer: null,
-
-	// shaders
-	metalGlossProgram: null,
-	normalProgram: null
-};
-
-export async function unityZipExport(editor, materialName) {
-	const zip = new AdmZip();
-
-	// write albedo first
-	if (editor.hasTextureChannel("albedo")) {
-		zip.addFile(
-			"albedo.png",
-			canvasToBuffer(editor.getChannelCanvasImage("albedo").canvas)
-		);
-	}
-
-	if (editor.hasTextureChannel("normal")) {
-		const normalCanvas = editor.getChannelCanvasImage("normal");
-		exporter.canvas.width = normalCanvas.width();
-		exporter.canvas.height = normalCanvas.height();
-
-		fixNormalMap(exporter, normalCanvas.createTexture(exporter.gl));
-
-		zip.addFile("normal.png", canvasToBuffer(exporter.canvas));
-	}
-
-	if (
-		editor.hasTextureChannel("metalness") ||
-		editor.hasTextureChannel("roughness")
-	) {
-		exporter.canvas.width = editor.getImageWidth();
-		exporter.canvas.height = editor.getImageHeight();
-
-		let mTex = null;
-		if (editor.hasTextureChannel("metalness"))
-			mTex = editor
-				.getChannelCanvasImage("metalness")
-				.createTexture(exporter.gl);
-
-		let rTex = null;
-		if (editor.hasTextureChannel("roughness"))
-			rTex = editor
-				.getChannelCanvasImage("roughness")
-				.createTexture(exporter.gl);
-
-		generateMetallicGloss(exporter, mTex, rTex);
-
-		zip.addFile("metallic_gloss.png", canvasToBuffer(exporter.canvas));
-	}
-
-	if (editor.hasTextureChannel("height")) {
-		zip.addFile(
-			"height.png",
-			canvasToBuffer(editor.getChannelCanvasImage("height").canvas)
-		);
-	}
-
-	return zip;
-}
-
-// merges metallic and inverted roughness map
-// uses a metallic of 0 if no metallic map is provided
-// sets glosiness to 0 by default
-function generateMetallicGloss(exporter, mTex, rTex) {
-	renderToImage(exporter, exporter.metalGlossProgram, [
-		{ name: "u_metallicMap", tex: mTex },
-		{ name: "u_roughnessMap", tex: rTex }
-	]);
-}
-
-// inverts normal map
-function fixNormalMap(exporter, tex) {
-	renderToImage(exporter, exporter.normalProgram, [
-		{ name: "u_normalMap", tex: tex }
-	]);
-}
-
-const DEFAULT_VERT = `precision mediump float;
-    
-    attribute vec3 a_pos;
-    attribute vec2 a_texCoord;
-        
-    // the texCoords passed in from the vertex shader.
-    varying vec2 v_texCoord;
-        
-    void main() {
-        gl_Position = vec4(a_pos,1.0);
-        v_texCoord = a_texCoord;
-    }`;
-
-const NORMAl_FRAG = `precision mediump float;
-    varying vec2 v_texCoord;
-    uniform sampler2D u_normalMap;
-        
-    void main() {
-        vec4 norm = texture2D(u_normalMap,vec2(v_texCoord.x, 1.0 - v_texCoord.y));
-        norm.z = 1.0 - norm.z;
-        gl_FragColor = norm;
-    }`;
-
-const METALLICGLOSS_FRAG = `precision mediump float;
-    varying vec2 v_texCoord;
-    uniform sampler2D u_metallicMap;
-    uniform bool u_metallicMapEnabled;
-    uniform sampler2D u_roughnessMap;
-    uniform bool u_roughnessMapEnabled;
-        
-    void main() {
-        vec2 texCoord = vec2(v_texCoord.x, 1.0 - v_texCoord.y);
-        float metal = 0.0;
-        if (u_metallicMapEnabled)
-             metal = texture2D(u_metallicMap,texCoord).r;
-    
-        
-        float gloss = 0.0;
-        if (u_roughnessMapEnabled)
-            gloss = 1.0 - texture2D(u_roughnessMap,texCoord).r;
-    
-        gl_FragColor = vec4(vec3(metal), gloss);
-    }`;
-
-// creates canvas and context
-// creates shaders for converting the the textures
-function initGLAndResources(exporter) {
-	const canvas = document.createElement("canvas");
-	const gl = canvas.getContext("webgl");
-
-	exporter.canvas = canvas;
-	exporter.gl = gl;
-
-	exporter.metalGlossProgram = buildShaderProgram(
-		gl,
-		DEFAULT_VERT,
-		METALLICGLOSS_FRAG
-	);
-	exporter.normalProgram = buildShaderProgram(gl, DEFAULT_VERT, NORMAl_FRAG);
-
-	createVertexBuffers(exporter);
-}
-
-function getShaderSource(id) {
-	const shaderScript = document.getElementById(id);
-	if (!shaderScript) {
-		return null;
-	}
-
-	let str = "";
-	let k = shaderScript.firstChild;
-	while (k) {
-		if (k.nodeType == 3) {
-			str += k.textContent;
-		}
-		k = k.nextSibling;
-	}
-
-	return str;
-}
-
-function compileShader(gl, source, shaderType) {
-	const shader = gl.createShader(shaderType);
-
-	gl.shaderSource(shader, source);
-	gl.compileShader(shader);
-
-	if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
-		alert(gl.getShaderInfoLog(shader));
-		return null;
-	}
-
-	return shader;
-}
-
-function buildShaderProgram(gl, vertSource, fragSource) {
-	const vertexShader = compileShader(gl, vertSource, gl.VERTEX_SHADER);
-	const fragmentShader = compileShader(gl, fragSource, gl.FRAGMENT_SHADER);
-
-	const shaderProgram = gl.createProgram();
-	gl.attachShader(shaderProgram, vertexShader);
-	gl.attachShader(shaderProgram, fragmentShader);
-	gl.linkProgram(shaderProgram);
-
-	if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
-		alert("Could not initialise shaders");
-	}
-
-	gl.useProgram(shaderProgram);
-
-	return shaderProgram;
-}
-
-//var texCoordBuffer = new WebGLBuffer;
-//var posBuffer = new WebGLBuffer;
-
-// render quad using shader and texture inputs
-// returns HtmlImageElement
-function renderToImage(exporter, program, inputs) {
-	const gl = exporter.gl;
-
-	gl.viewport(0, 0, exporter.canvas.width, exporter.canvas.height);
-
-	// bind texture to fbo
-	//gl.clearColor(0,0,1,1);
-	gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
-
-	// bind shader
-	gl.useProgram(program);
-
-	// pass textures
-	let texIndex = 0;
-	for (const i in inputs) {
-		const input = inputs[i];
-		if (input.tex) {
-			gl.activeTexture(gl.TEXTURE0 + texIndex);
-			gl.bindTexture(gl.TEXTURE_2D, input.tex);
-			gl.uniform1i(gl.getUniformLocation(program, input.name), texIndex);
-			gl.uniform1i(gl.getUniformLocation(program, input.name + "Enabled"), 1);
-		} else {
-			gl.uniform1i(gl.getUniformLocation(program, input.name + "Enabled"), 0);
-		}
-		texIndex++;
-	}
-
-	// bind mesh
-	const posLoc = gl.getAttribLocation(program, "a_pos");
-	const texCoordLoc = gl.getAttribLocation(program, "a_texCoord");
-
-	// provide texture coordinates for the rectangle.
-	gl.bindBuffer(gl.ARRAY_BUFFER, exporter.posBuffer);
-	gl.enableVertexAttribArray(posLoc);
-	gl.vertexAttribPointer(posLoc, 3, gl.FLOAT, false, 0, 0);
-
-	gl.bindBuffer(gl.ARRAY_BUFFER, exporter.texCoordBuffer);
-	gl.enableVertexAttribArray(texCoordLoc);
-	gl.vertexAttribPointer(texCoordLoc, 2, gl.FLOAT, false, 0, 0);
-
-	gl.drawArrays(gl.TRIANGLES, 0, 6);
-
-	gl.disableVertexAttribArray(posLoc);
-	gl.disableVertexAttribArray(texCoordLoc);
-}
-
-function createVertexBuffers(exporter) {
-	const gl = exporter.gl;
-
-	// provide texture coordinates for the rectangle.
-	const texCoordBuffer = gl.createBuffer();
-	gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
-	gl.bufferData(
-		gl.ARRAY_BUFFER,
-		new Float32Array([
-			0.0,
-			0.0,
-			1.0,
-			0.0,
-			0.0,
-			1.0,
-			0.0,
-			1.0,
-			1.0,
-			0.0,
-			1.0,
-			1.0
-		]),
-		gl.STATIC_DRAW
-	);
-
-	const posBuffer = gl.createBuffer();
-	gl.bindBuffer(gl.ARRAY_BUFFER, posBuffer);
-	gl.bufferData(
-		gl.ARRAY_BUFFER,
-		new Float32Array([
-			-1.0,
-			-1.0,
-			0.0,
-			1.0,
-			-1.0,
-			0.0,
-			-1.0,
-			1.0,
-			0.0,
-			-1.0,
-			1.0,
-			0.0,
-			1.0,
-			-1.0,
-			0.0,
-			1.0,
-			1.0,
-			0.0
-		]),
-		gl.STATIC_DRAW
-	);
-
-	gl.bindBuffer(gl.ARRAY_BUFFER, null);
-
-	exporter.texCoordBuffer = texCoordBuffer;
-	exporter.posBuffer = posBuffer;
-}
-
-function canvasToBase64(canvas) {
-	let data = canvas.toDataURL();
-	// todo: maybe script header?
-	// https://code-examples.net/en/q/6f412f
-	data = data.replace(/^data:image\/(png|jpg);base64,/, "");
-	return data;
-}
-
-function canvasToBuffer(canvas) {
-	// https://github.com/mattdesl/electron-canvas-to-buffer/blob/master/index.js
-	const url = canvas.toDataURL("image/png", 1);
-	const nativeImage = electron.nativeImage.createFromDataURL(url);
-	const buffer = nativeImage.toPNG();
-
-	return buffer;
-}
-
-// todo: cleanup textures!!
-
-// initialize
-initGLAndResources(exporter);
diff --git a/src/lib/export/zipexporter.js b/src/lib/export/zipexporter.js
deleted file mode 100644
index f605202e..00000000
--- a/src/lib/export/zipexporter.js
+++ /dev/null
@@ -1,302 +0,0 @@
-import AdmZip from "adm-zip";
-import electron from "electron";
-
-const TextureType = {
-	Default: 0,
-	NormalMap: 1
-};
-
-const exporter = {
-	canvas: null,
-	gl: null,
-	posBuffer: null,
-	texCoordBuffer: null,
-
-	// shaders
-	metalGlossProgram: null,
-	normalProgram: null
-};
-
-export async function zipExport(editor, materialName) {
-	const zip = new AdmZip();
-
-	// write albedo first
-	// if (editor.hasTextureChannel("albedo")) {
-	//   zip.addFile(
-	//     "albedo.png",
-	//     canvasToBuffer(editor.getChannelCanvasImage("albedo").canvas)
-	//   );
-	// }
-
-	for (const channel in editor.textureChannels) {
-		if (editor.textureChannels.hasOwnProperty(channel)) {
-			zip.addFile(
-				channel + ".png",
-				canvasToBuffer(editor.getChannelCanvasImage(channel).canvas)
-			);
-		}
-	}
-
-	return zip;
-}
-
-// merges metallic and inverted roughness map
-// uses a metallic of 0 if no metallic map is provided
-// sets glosiness to 0 by default
-function generateMetallicGloss(exporter, mTex, rTex) {
-	renderToImage(exporter, exporter.metalGlossProgram, [
-		{ name: "u_metallicMap", tex: mTex },
-		{ name: "u_roughnessMap", tex: rTex }
-	]);
-}
-
-// inverts normal map
-function fixNormalMap(exporter, tex) {
-	renderToImage(exporter, exporter.normalProgram, [
-		{ name: "u_normalMap", tex: tex }
-	]);
-}
-
-const DEFAULT_VERT = `precision mediump float;
-    
-    attribute vec3 a_pos;
-    attribute vec2 a_texCoord;
-        
-    // the texCoords passed in from the vertex shader.
-    varying vec2 v_texCoord;
-        
-    void main() {
-        gl_Position = vec4(a_pos,1.0);
-        v_texCoord = a_texCoord;
-    }`;
-
-const NORMAl_FRAG = `precision mediump float;
-    varying vec2 v_texCoord;
-    uniform sampler2D u_normalMap;
-        
-    void main() {
-        vec4 norm = texture2D(u_normalMap,vec2(v_texCoord.x, 1.0 - v_texCoord.y));
-        norm.z = 1.0 - norm.z;
-        gl_FragColor = norm;
-    }`;
-
-const METALLICGLOSS_FRAG = `precision mediump float;
-    varying vec2 v_texCoord;
-    uniform sampler2D u_metallicMap;
-    uniform bool u_metallicMapEnabled;
-    uniform sampler2D u_roughnessMap;
-    uniform bool u_roughnessMapEnabled;
-        
-    void main() {
-        vec2 texCoord = vec2(v_texCoord.x, 1.0 - v_texCoord.y);
-        float metal = 0.0;
-        if (u_metallicMapEnabled)
-             metal = texture2D(u_metallicMap,texCoord).r;
-    
-        
-        float gloss = 0.0;
-        if (u_roughnessMapEnabled)
-            gloss = 1.0 - texture2D(u_roughnessMap,texCoord).r;
-    
-        gl_FragColor = vec4(vec3(metal), gloss);
-    }`;
-
-// creates canvas and context
-// creates shaders for converting the the textures
-function initGLAndResources(exporter) {
-	const canvas = document.createElement("canvas");
-	const gl = canvas.getContext("webgl");
-
-	exporter.canvas = canvas;
-	exporter.gl = gl;
-
-	exporter.metalGlossProgram = buildShaderProgram(
-		gl,
-		DEFAULT_VERT,
-		METALLICGLOSS_FRAG
-	);
-	exporter.normalProgram = buildShaderProgram(gl, DEFAULT_VERT, NORMAl_FRAG);
-
-	createVertexBuffers(exporter);
-}
-
-function getShaderSource(id) {
-	const shaderScript = document.getElementById(id);
-	if (!shaderScript) {
-		return null;
-	}
-
-	let str = "";
-	let k = shaderScript.firstChild;
-	while (k) {
-		if (k.nodeType == 3) {
-			str += k.textContent;
-		}
-		k = k.nextSibling;
-	}
-
-	return str;
-}
-
-function compileShader(gl, source, shaderType) {
-	const shader = gl.createShader(shaderType);
-
-	gl.shaderSource(shader, source);
-	gl.compileShader(shader);
-
-	if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
-		alert(gl.getShaderInfoLog(shader));
-		return null;
-	}
-
-	return shader;
-}
-
-function buildShaderProgram(gl, vertSource, fragSource) {
-	const vertexShader = compileShader(gl, vertSource, gl.VERTEX_SHADER);
-	const fragmentShader = compileShader(gl, fragSource, gl.FRAGMENT_SHADER);
-
-	const shaderProgram = gl.createProgram();
-	gl.attachShader(shaderProgram, vertexShader);
-	gl.attachShader(shaderProgram, fragmentShader);
-	gl.linkProgram(shaderProgram);
-
-	if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
-		alert("Could not initialise shaders");
-	}
-
-	gl.useProgram(shaderProgram);
-
-	return shaderProgram;
-}
-
-//var texCoordBuffer = new WebGLBuffer;
-//var posBuffer = new WebGLBuffer;
-
-// render quad using shader and texture inputs
-// returns HtmlImageElement
-function renderToImage(exporter, program, inputs) {
-	const gl = exporter.gl;
-
-	gl.viewport(0, 0, exporter.canvas.width, exporter.canvas.height);
-
-	// bind texture to fbo
-	//gl.clearColor(0,0,1,1);
-	gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
-
-	// bind shader
-	gl.useProgram(program);
-
-	// pass textures
-	let texIndex = 0;
-	for (const i in inputs) {
-		const input = inputs[i];
-		if (input.tex) {
-			gl.activeTexture(gl.TEXTURE0 + texIndex);
-			gl.bindTexture(gl.TEXTURE_2D, input.tex);
-			gl.uniform1i(gl.getUniformLocation(program, input.name), texIndex);
-			gl.uniform1i(gl.getUniformLocation(program, input.name + "Enabled"), 1);
-		} else {
-			gl.uniform1i(gl.getUniformLocation(program, input.name + "Enabled"), 0);
-		}
-		texIndex++;
-	}
-
-	// bind mesh
-	const posLoc = gl.getAttribLocation(program, "a_pos");
-	const texCoordLoc = gl.getAttribLocation(program, "a_texCoord");
-
-	// provide texture coordinates for the rectangle.
-	gl.bindBuffer(gl.ARRAY_BUFFER, exporter.posBuffer);
-	gl.enableVertexAttribArray(posLoc);
-	gl.vertexAttribPointer(posLoc, 3, gl.FLOAT, false, 0, 0);
-
-	gl.bindBuffer(gl.ARRAY_BUFFER, exporter.texCoordBuffer);
-	gl.enableVertexAttribArray(texCoordLoc);
-	gl.vertexAttribPointer(texCoordLoc, 2, gl.FLOAT, false, 0, 0);
-
-	gl.drawArrays(gl.TRIANGLES, 0, 6);
-
-	gl.disableVertexAttribArray(posLoc);
-	gl.disableVertexAttribArray(texCoordLoc);
-}
-
-function createVertexBuffers(exporter) {
-	const gl = exporter.gl;
-
-	// provide texture coordinates for the rectangle.
-	const texCoordBuffer = gl.createBuffer();
-	gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
-	gl.bufferData(
-		gl.ARRAY_BUFFER,
-		new Float32Array([
-			0.0,
-			0.0,
-			1.0,
-			0.0,
-			0.0,
-			1.0,
-			0.0,
-			1.0,
-			1.0,
-			0.0,
-			1.0,
-			1.0
-		]),
-		gl.STATIC_DRAW
-	);
-
-	const posBuffer = gl.createBuffer();
-	gl.bindBuffer(gl.ARRAY_BUFFER, posBuffer);
-	gl.bufferData(
-		gl.ARRAY_BUFFER,
-		new Float32Array([
-			-1.0,
-			-1.0,
-			0.0,
-			1.0,
-			-1.0,
-			0.0,
-			-1.0,
-			1.0,
-			0.0,
-			-1.0,
-			1.0,
-			0.0,
-			1.0,
-			-1.0,
-			0.0,
-			1.0,
-			1.0,
-			0.0
-		]),
-		gl.STATIC_DRAW
-	);
-
-	gl.bindBuffer(gl.ARRAY_BUFFER, null);
-
-	exporter.texCoordBuffer = texCoordBuffer;
-	exporter.posBuffer = posBuffer;
-}
-
-function canvasToBase64(canvas) {
-	let data = canvas.toDataURL();
-	// todo: maybe script header?
-	// https://code-examples.net/en/q/6f412f
-	data = data.replace(/^data:image\/(png|jpg);base64,/, "");
-	return data;
-}
-
-function canvasToBuffer(canvas) {
-	// https://github.com/mattdesl/electron-canvas-to-buffer/blob/master/index.js
-	const url = canvas.toDataURL("image/png", 1);
-	const nativeImage = electron.nativeImage.createFromDataURL(url);
-	const buffer = nativeImage.toPNG();
-
-	return buffer;
-}
-
-// todo: cleanup textures!!
-
-// initialize
-initGLAndResources(exporter);
diff --git a/src/lib/geometry/cylinder.ts b/src/lib/geometry/cylinder.ts
deleted file mode 100644
index 9b10b364..00000000
--- a/src/lib/geometry/cylinder.ts
+++ /dev/null
@@ -1,218 +0,0 @@
-// snatched from three.js
-
-/**
- * @author mrdoob / http://mrdoob.com/
- * @author Mugen87 / https://github.com/Mugen87
- * @author njbrown /  https://twitter.com/njbrown
- */
-
-import { Geometry } from "three";
-import { BufferGeometry } from "three";
-import { Float32BufferAttribute } from "three";
-import { Vector3 } from "three";
-import { Vector2 } from "three";
-
-class CylinderGeometry extends Geometry {
-	parameters = {};
-
-	constructor(
-		radiusTop?,
-		radiusBottom?,
-		height?,
-		radialSegments?,
-		heightSegments?,
-		openEnded?,
-		thetaStart?,
-		thetaLength?
-	) {
-		super();
-
-		this.type = "CylinderGeometry";
-
-		this.parameters = {
-			radiusTop: radiusTop,
-			radiusBottom: radiusBottom,
-			height: height,
-			radialSegments: radialSegments,
-			heightSegments: heightSegments,
-			openEnded: openEnded,
-			thetaStart: thetaStart,
-			thetaLength: thetaLength
-		};
-
-		this.fromBufferGeometry(
-			new CylinderBufferGeometry(
-				radiusTop,
-				radiusBottom,
-				height,
-				radialSegments,
-				heightSegments,
-				openEnded,
-				thetaStart,
-				thetaLength
-			)
-		);
-		this.mergeVertices();
-	}
-}
-
-class CylinderBufferGeometry extends BufferGeometry {
-	parameters = {};
-	constructor(
-		radiusTop?,
-		radiusBottom?,
-		height?,
-		radialSegments?,
-		heightSegments?,
-		openEnded?,
-		thetaStart?,
-		thetaLength?
-	) {
-		super();
-
-		this.type = "CylinderBufferGeometry";
-
-		this.parameters = {
-			radiusTop: radiusTop,
-			radiusBottom: radiusBottom,
-			height: height,
-			radialSegments: radialSegments,
-			heightSegments: heightSegments,
-			openEnded: openEnded,
-			thetaStart: thetaStart,
-			thetaLength: thetaLength
-		};
-
-		const scope = this;
-
-		radiusTop = radiusTop !== undefined ? radiusTop : 1;
-		radiusBottom = radiusBottom !== undefined ? radiusBottom : 1;
-		height = height || 1;
-
-		radialSegments = Math.floor(radialSegments) || 8;
-		heightSegments = Math.floor(heightSegments) || 1;
-
-		openEnded = openEnded !== undefined ? openEnded : false;
-		thetaStart = thetaStart !== undefined ? thetaStart : 0.0;
-		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;
-
-		// buffers
-
-		const indices = [];
-		const vertices = [];
-		const normals = [];
-		const uvs = [];
-
-		// helper variables
-
-		let index = 0;
-		const indexArray = [];
-		const halfHeight = height / 2;
-		let groupStart = 0;
-
-		// generate geometry
-
-		generateTorso();
-
-		// open-ended by default
-		// if (openEnded === false) {
-		// 	if (radiusTop > 0) generateCap(true);
-		// 	if (radiusBottom > 0) generateCap(false);
-		// }
-
-		// build geometry
-
-		this.setIndex(indices);
-		this.addAttribute("position", new Float32BufferAttribute(vertices, 3));
-		this.addAttribute("normal", new Float32BufferAttribute(normals, 3));
-		this.addAttribute("uv", new Float32BufferAttribute(uvs, 2));
-
-		function generateTorso() {
-			let x, y;
-			const normal = new Vector3();
-			const vertex = new Vector3();
-
-			let groupCount = 0;
-
-			// this will be used to calculate the normal
-			const slope = (radiusBottom - radiusTop) / height;
-
-			// generate vertices, normals and uvs
-
-			for (y = 0; y <= heightSegments; y++) {
-				const indexRow = [];
-
-				const v = y / heightSegments;
-
-				// calculate the radius of the current row
-
-				const radius = v * (radiusBottom - radiusTop) + radiusTop;
-
-				for (x = 0; x <= radialSegments; x++) {
-					const u = x / radialSegments;
-
-					const theta = u * thetaLength + thetaStart;
-
-					const sinTheta = Math.sin(theta);
-					const cosTheta = Math.cos(theta);
-
-					// vertex
-
-					vertex.x = radius * sinTheta;
-					vertex.y = -v * height + halfHeight;
-					vertex.z = radius * cosTheta;
-					vertices.push(vertex.x, vertex.y, vertex.z);
-
-					// normal
-
-					normal.set(sinTheta, slope, cosTheta).normalize();
-					normals.push(normal.x, normal.y, normal.z);
-
-					// uv
-
-					uvs.push(u * 4, 1 - v);
-
-					// save index of vertex in respective row
-
-					indexRow.push(index++);
-				}
-
-				// now save vertices of the row in our index array
-
-				indexArray.push(indexRow);
-			}
-
-			// generate indices
-
-			for (x = 0; x < radialSegments; x++) {
-				for (y = 0; y < heightSegments; y++) {
-					// we use the index array to access the correct indices
-
-					const a = indexArray[y][x];
-					const b = indexArray[y + 1][x];
-					const c = indexArray[y + 1][x + 1];
-					const d = indexArray[y][x + 1];
-
-					// faces
-
-					indices.push(a, b, d);
-					indices.push(b, c, d);
-
-					// update group counter
-
-					groupCount += 6;
-				}
-			}
-
-			// add a group to the geometry. this will ensure multi material support
-
-			scope.addGroup(groupStart, groupCount, 0);
-
-			// calculate new start value for groups
-
-			groupStart += groupCount;
-		}
-	}
-}
-
-export { CylinderGeometry, CylinderBufferGeometry };
diff --git a/src/lib/geometry/plane.ts b/src/lib/geometry/plane.ts
deleted file mode 100644
index a88b03f0..00000000
--- a/src/lib/geometry/plane.ts
+++ /dev/null
@@ -1,117 +0,0 @@
-/**
- * @author mrdoob / http://mrdoob.com/
- * @author Mugen87 / https://github.com/Mugen87
- * @author njbrown /  https://twitter.com/njbrown
- */
-
-import { Geometry } from "three";
-import { BufferGeometry } from "three";
-import { Float32BufferAttribute } from "three";
-import { Vector3 } from "three";
-import { Vector2 } from "three";
-
-// PlaneGeometry (X, Z)
-
-class PlaneGeometry extends Geometry {
-	parameters = {};
-
-	constructor(width, height, widthSegments, heightSegments) {
-		super();
-		this.type = "PlaneGeometry";
-
-		this.parameters = {
-			width: width,
-			height: height,
-			widthSegments: widthSegments,
-			heightSegments: heightSegments
-		};
-
-		this.fromBufferGeometry(
-			new PlaneBufferGeometry(width, height, widthSegments, heightSegments)
-		);
-		this.mergeVertices();
-	}
-}
-
-// PlaneBufferGeometry
-
-class PlaneBufferGeometry extends BufferGeometry {
-	parameters = {};
-
-	constructor(width, height, widthSegments, heightSegments) {
-		super();
-
-		this.type = "PlaneBufferGeometry";
-
-		this.parameters = {
-			width: width,
-			height: height,
-			widthSegments: widthSegments,
-			heightSegments: heightSegments
-		};
-
-		width = width || 1;
-		height = height || 1;
-
-		const width_half = width / 2;
-		const height_half = height / 2;
-
-		const gridX = Math.floor(widthSegments) || 1;
-		const gridY = Math.floor(heightSegments) || 1;
-
-		const gridX1 = gridX + 1;
-		const gridY1 = gridY + 1;
-
-		const segment_width = width / gridX;
-		const segment_height = height / gridY;
-
-		// buffers
-
-		const indices = [];
-		const vertices = [];
-		const normals = [];
-		const uvs = [];
-
-		// generate vertices, normals and uvs
-
-		for (let iy = 0; iy < gridY1; iy++) {
-			const y = iy * segment_height - height_half;
-
-			for (let ix = 0; ix < gridX1; ix++) {
-				const x = ix * segment_width - width_half;
-
-				vertices.push(x, 0, y);
-
-				normals.push(0, 1, 0);
-
-				uvs.push(ix / gridX);
-				uvs.push(1 - iy / gridY);
-			}
-		}
-
-		// indices
-
-		for (let iy = 0; iy < gridY; iy++) {
-			for (let ix = 0; ix < gridX; ix++) {
-				const a = ix + gridX1 * iy;
-				const b = ix + gridX1 * (iy + 1);
-				const c = ix + 1 + gridX1 * (iy + 1);
-				const d = ix + 1 + gridX1 * iy;
-
-				// faces
-
-				indices.push(a, b, d);
-				indices.push(b, c, d);
-			}
-		}
-
-		// build geometry
-
-		this.setIndex(indices);
-		this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
-		this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
-		this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
-	}
-}
-
-export { PlaneGeometry, PlaneBufferGeometry };
diff --git a/src/lib/geometry/sphere.ts b/src/lib/geometry/sphere.ts
deleted file mode 100644
index fb57f9b8..00000000
--- a/src/lib/geometry/sphere.ts
+++ /dev/null
@@ -1,183 +0,0 @@
-// snatched from threejs
-/**
- * @author mrdoob / http://mrdoob.com/
- * @author benaadams / https://twitter.com/ben_a_adams
- * @author Mugen87 / https://github.com/Mugen87
- * @author njbrown /  https://twitter.com/njbrown
- */
-
-import { Geometry } from "three";
-import { BufferGeometry } from "three";
-import { Float32BufferAttribute } from "three";
-import { Vector3 } from "three";
-
-class SphereGeometry extends Geometry {
-	parameters = {};
-	constructor(
-		radius?,
-		widthSegments?,
-		heightSegments?,
-		phiStart?,
-		phiLength?,
-		thetaStart?,
-		thetaLength?
-	) {
-		super();
-
-		this.type = "SphereGeometry";
-
-		this.parameters = {
-			radius: radius,
-			widthSegments: widthSegments,
-			heightSegments: heightSegments,
-			phiStart: phiStart,
-			phiLength: phiLength,
-			thetaStart: thetaStart,
-			thetaLength: thetaLength
-		};
-
-		this.fromBufferGeometry(
-			new SphereBufferGeometry(
-				radius,
-				widthSegments,
-				heightSegments,
-				phiStart,
-				phiLength,
-				thetaStart,
-				thetaLength
-			)
-		);
-		//this.mergeVertices();
-	}
-}
-
-// SphereBufferGeometry
-
-class SphereBufferGeometry extends BufferGeometry {
-	parameters = {};
-	constructor(
-		radius,
-		widthSegments,
-		heightSegments,
-		phiStart,
-		phiLength,
-		thetaStart,
-		thetaLength
-	) {
-		super();
-
-		this.type = "SphereBufferGeometry";
-
-		this.parameters = {
-			radius: radius,
-			widthSegments: widthSegments,
-			heightSegments: heightSegments,
-			phiStart: phiStart,
-			phiLength: phiLength,
-			thetaStart: thetaStart,
-			thetaLength: thetaLength
-		};
-
-		radius = radius || 1;
-
-		widthSegments = Math.max(3, Math.floor(widthSegments) || 8);
-		heightSegments = Math.max(2, Math.floor(heightSegments) || 6);
-
-		phiStart = phiStart !== undefined ? phiStart : 0;
-		phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;
-
-		thetaStart = thetaStart !== undefined ? thetaStart : 0;
-		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;
-
-		const thetaEnd = Math.min(thetaStart + thetaLength, Math.PI);
-
-		let ix, iy;
-
-		let index = 0;
-		const grid = [];
-
-		const vertex = new Vector3();
-		const normal = new Vector3();
-
-		// buffers
-
-		const indices = [];
-		const vertices = [];
-		const normals = [];
-		const uvs = [];
-
-		// generate vertices, normals and uvs
-
-		for (iy = 0; iy <= heightSegments; iy++) {
-			const verticesRow = [];
-
-			const v = iy / heightSegments;
-
-			// special case for the poles
-
-			let uOffset = 0;
-
-			if (iy == 0 && thetaStart == 0) {
-				uOffset = 0.5 / widthSegments;
-			} else if (iy == heightSegments && thetaEnd == Math.PI) {
-				uOffset = -0.5 / widthSegments;
-			}
-
-			for (ix = 0; ix <= widthSegments; ix++) {
-				const u = ix / widthSegments;
-
-				// vertex
-
-				vertex.x =
-					-radius *
-					Math.cos(phiStart + u * phiLength) *
-					Math.sin(thetaStart + v * thetaLength);
-				vertex.y = radius * Math.cos(thetaStart + v * thetaLength);
-				vertex.z =
-					radius *
-					Math.sin(phiStart + u * phiLength) *
-					Math.sin(thetaStart + v * thetaLength);
-
-				vertices.push(vertex.x, vertex.y, vertex.z);
-
-				// normal
-
-				normal.copy(vertex).normalize();
-				normals.push(normal.x, normal.y, normal.z);
-
-				// uv
-
-				uvs.push((u + uOffset) * 2, 1 - v);
-
-				verticesRow.push(index++);
-			}
-
-			grid.push(verticesRow);
-		}
-
-		// indices
-
-		for (iy = 0; iy < heightSegments; iy++) {
-			for (ix = 0; ix < widthSegments; ix++) {
-				const a = grid[iy][ix + 1];
-				const b = grid[iy][ix];
-				const c = grid[iy + 1][ix];
-				const d = grid[iy + 1][ix + 1];
-
-				if (iy !== 0 || thetaStart > 0) indices.push(a, b, d);
-				if (iy !== heightSegments - 1 || thetaEnd < Math.PI)
-					indices.push(b, c, d);
-			}
-		}
-
-		// build geometry
-
-		this.setIndex(indices);
-		this.addAttribute("position", new Float32BufferAttribute(vertices, 3));
-		this.addAttribute("normal", new Float32BufferAttribute(normals, 3));
-		this.addAttribute("uv", new Float32BufferAttribute(uvs, 2));
-		this.addAttribute("uv2", new Float32BufferAttribute(uvs, 2));
-	}
-}
-
-export { SphereGeometry, SphereBufferGeometry };
diff --git a/src/lib/library/libraryv0.ts b/src/lib/library/libraryv0.ts
deleted file mode 100644
index 0b334bf8..00000000
--- a/src/lib/library/libraryv0.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-import {
-	TestShapeNode,
-	TestGradientNode,
-	TestSimplexNode,
-	TestWorleyNode,
-	TestMultiplyNode,
-	TestInvertNode,
-	TestNormalNode,
-	TestBrickNode,
-	TestWarpNode
-} from "./v0/nodes";
-
-import { DesignerLibrary } from "../designer/library";
-
-export function createLibrary() {
-	const lib = new DesignerLibrary();
-	lib.versionName = "v0";
-	lib.addNode("shape", "Shape", TestShapeNode);
-	lib.addNode("gradient", "Gradient", TestGradientNode);
-	lib.addNode("multiply", "Multiply", TestMultiplyNode);
-	lib.addNode("invert", "Invert", TestInvertNode);
-	lib.addNode("worley", "Worley", TestWorleyNode);
-	lib.addNode("normal", "Normal", TestNormalNode);
-	lib.addNode("brick", "Brick", TestBrickNode);
-	lib.addNode("warp", "Warp", TestWarpNode);
-	lib.addNode("simplex", "Simpled Noise", TestSimplexNode);
-
-	return lib;
-}
diff --git a/src/lib/library/libraryv1.ts b/src/lib/library/libraryv1.ts
deleted file mode 100644
index 7e771d6a..00000000
--- a/src/lib/library/libraryv1.ts
+++ /dev/null
@@ -1,76 +0,0 @@
-import { BrickGeneratorNode } from "./v1/brickgenerator";
-import { NormalMapNode, BetterWarpNode } from "./v1/normalmap";
-import { CellNode } from "./v1/cellnode";
-import { SolidCellNode } from "./v1/solidcell";
-import { LineCellNode } from "./v1/linecell";
-import { PolygonNode, CircleNode } from "./v1/shapes";
-import { BlendNode } from "./v1/blend";
-import { InvertNode } from "./v1/invert";
-import { WarpNode } from "./v1/warp";
-import { ColorNode, ColorizeNode } from "./v1/color";
-import { SimplexNoiseNode } from "./v1/simplexnoise";
-import { MaskNode } from "./v1/mask";
-import { Transform2DNode } from "./v1/transform2d";
-import { MapRangeNode } from "./v1/maprange";
-import { SplatNode } from "./v1/splat";
-import { Perlin3DNode } from "./v1/perlin3d";
-import { HexagonNode } from "./v1/hexagon";
-import { FractalNoiseNode } from "./v1/fractalnoise";
-import { TileNode } from "./v1/tile";
-import { ThresholdNode } from "./v1/threshold";
-import { HeightShiftNode } from "./v1/heightshift";
-import { CheckerBoardNode } from "./v1/checkerboard";
-import { DirectionalWarpNode } from "./v1/directionalwarp";
-import { MirrorNode } from "./v1/mirror";
-import { BrightnessContrastNode } from "./v1/brightnesscontrast";
-import { WaveNode } from "./v1/wave";
-import { CopyNode } from "./v1/copy";
-import { GradientNode, TriGradientNode } from "./v1/gradient";
-import { DesignerLibrary } from "../designer/library";
-import { OutputNode } from "./v1/output";
-import { GradientMapNode } from "./v1/gradientmap";
-
-export function createLibrary() {
-	const lib = new DesignerLibrary();
-	lib.versionName = "v1";
-	lib.addNode("brickgenerator", "Brick Generator", BrickGeneratorNode);
-	lib.addNode("normalmap", "Normal Map", NormalMapNode);
-	lib.addNode("cell", "Cell", CellNode);
-	lib.addNode("solidcell", "Solid Cell", SolidCellNode);
-	lib.addNode("linecell", "Line Cell", LineCellNode);
-	lib.addNode("circle", "Circle", CircleNode);
-	lib.addNode("polygon", "Polygon", PolygonNode);
-	lib.addNode("blend", "Blend", BlendNode);
-	lib.addNode("invert", "Invert", InvertNode);
-	lib.addNode("warp", "Warp", WarpNode);
-	lib.addNode("color", "Color", ColorNode);
-	lib.addNode("colorize", "Colorize", ColorizeNode);
-	lib.addNode("simplexnoise", "Simplex Noise", SimplexNoiseNode);
-	lib.addNode("mask", "Mask", MaskNode);
-	lib.addNode("transform2d", "Transform2D", Transform2DNode);
-	lib.addNode("maprange", "Map Range", MapRangeNode);
-	lib.addNode("splat", "Splat", SplatNode);
-	lib.addNode("perlin3d", "Perlin 3D", Perlin3DNode);
-	lib.addNode("hexagon", "Hexagon", HexagonNode);
-	lib.addNode("fractalnoise", "Fractal Noise", FractalNoiseNode);
-	lib.addNode("tile", "Tile", TileNode);
-	lib.addNode("threshold", "Threshold", ThresholdNode);
-	lib.addNode("heightshift", "Height Shift", HeightShiftNode);
-	lib.addNode("checkerboard", "CheckerBoard", CheckerBoardNode);
-	lib.addNode("directionalwarp", "Directional Warp", DirectionalWarpNode);
-	lib.addNode("mirror", "Mirror", MirrorNode);
-	lib.addNode(
-		"brightnesscontrast",
-		"Brightness Contrast",
-		BrightnessContrastNode
-	);
-	lib.addNode("wave", "Wave", WaveNode);
-	lib.addNode("copy", "Copy", CopyNode);
-	lib.addNode("gradient", "Gradient", GradientNode);
-	lib.addNode("trigradient", "TriGradient", TriGradientNode);
-	lib.addNode("output", "Output", OutputNode);
-	lib.addNode("gradientmap", "Gradient Map", GradientMapNode);
-	// lib.addNode("betterwarp", "Better Warp", BetterWarpNode);
-
-	return lib;
-}
diff --git a/src/lib/library/libraryv2.ts b/src/lib/library/libraryv2.ts
deleted file mode 100644
index dae2dbc7..00000000
--- a/src/lib/library/libraryv2.ts
+++ /dev/null
@@ -1,188 +0,0 @@
-import { BrickGeneratorNode } from "./v1/brickgenerator";
-import { NormalMapV2 } from "./v2/normalmapv2";
-import { CellNode } from "./v1/cellnode";
-import { SolidCellNode } from "./v1/solidcell";
-import { LineCellNode } from "./v1/linecell";
-import { PolygonNode, CircleNode } from "./v1/shapes";
-import { BlendNode } from "./v1/blend";
-import { InvertNode } from "./v1/invert";
-import { WarpNodeV2 } from "./v2/warpv2";
-import { ColorNode, ColorizeNode } from "./v1/color";
-import { SimplexNoiseNode } from "./v1/simplexnoise";
-import { MaskNode } from "./v1/mask";
-import { Transform2DNodeV2 } from "./v2/transform2dv2";
-import { MapRangeNode } from "./v1/maprange";
-import { Perlin3DNode } from "./v1/perlin3d";
-import { HexagonNode } from "./v1/hexagon";
-import { FractalNoiseNode } from "./v1/fractalnoise";
-import { TileNode } from "./v1/tile";
-import { ThresholdNode } from "./v1/threshold";
-import { HeightShiftNode } from "./v1/heightshift";
-import { CheckerBoardNode } from "./v1/checkerboard";
-import { DirectionalWarpNode } from "./v1/directionalwarp";
-import { MirrorNode } from "./v1/mirror";
-import { BrightnessContrastNode } from "./v1/brightnesscontrast";
-import { WaveNode } from "./v1/wave";
-import { CopyNode } from "./v1/copy";
-import { GradientNode, TriGradientNode } from "./v1/gradient";
-import { DesignerLibrary } from "../designer/library";
-import { OutputNode } from "./v1/output";
-import { GradientMapNode } from "./v1/gradientmap";
-import { SplatNodeV2 } from "./v2/splat";
-import { BlurV2 } from "./v2/blur";
-import { AdvanceSplatterV2 } from "./v2/advancesplatter";
-import { SlopeBlur } from "./v2/slopeblur";
-import { TileSampler } from "./v2/tilesampler";
-import { GradientDynamic } from "./v2/gradientdynamic";
-import { Clamp } from "./v2/clamp";
-import { Pow } from "./v2/pow";
-import { Quantize } from "./v2/quantize";
-import { HistogramShift } from "./v2/histogramshift";
-import { HistogramScan } from "./v2/histogramscan";
-import { HistogramSelect } from "./v2/histogramselect";
-import { Skew } from "./v2/skew";
-import { Bevel } from "./v2/bevel";
-import { FloodFill } from "./v2/floodfill";
-import { FloodFillToColor } from "./v2/floodfilltocolor";
-import { FloodFillToBBox } from "./v2/floodfilltobbox";
-import { FloodFillToRandomColor } from "./v2/floodfilltorandomcolor";
-import { FloodFillToRandomIntensity } from "./v2/floodfilltorandomintensity";
-import { FloodFillSampler } from "./v2/floodfillsampler";
-import { FloodFillToGradient } from "./v2/floodfilltogradient";
-import { StripesNode } from "./v2/stripes";
-import { RgbaMerge } from "./v2/rgbamerge";
-import { RgbaShuffle } from "./v2/rgbashuffle";
-import { ExtractChannel } from "./v2/extractchannel";
-import { Grayscale } from "./v2/grayscale";
-import { InvertNormal } from "./v2/invertnormal";
-import { CapsuleNode } from "./v2/capsule";
-import { CartesianToPolar } from "./v2/cartesiantopolar";
-import { PolarToCartesian } from "./v2/polartocartesian";
-import { CombineNormals } from "./v2/combinenormals";
-import { SoftFlower } from "./v2/softflower";
-import { Star } from "./v2/star";
-import { HslExtract } from "./v2/hslextract";
-import { Hsl } from "./v2/hsl";
-import { DirectionalBlur } from "./v2/directionalblur";
-import { AnisotropicBlur } from "./v2/anisotropicblur";
-import { CircularSplatter } from "./v2/circularsplatter";
-import { ValueNoise } from "./v2/valuenoise";
-import { ValueNoiseFractalSum } from "./v2/valuenoisefractalsum";
-import { GradientNoise } from "./v2/gradientnoise";
-import { GradientNoiseFractalSum } from "./v2/gradientnoisefractalsum";
-import { SimplexNoiseV2 } from "./v2/simplexnoise";
-import { DirectionalWarpNodeV2 } from "./v2/directionalwarpv2";
-import { ImageNode } from "./v2/imagenode";
-
-export function createLibrary() {
-	const lib = new DesignerLibrary();
-	lib.versionName = "v2";
-	lib.addNode("brickgenerator", "Brick Generator", BrickGeneratorNode);
-	lib.addNode("normalmap", "Normal Map", NormalMapV2);
-	lib.addNode("cell", "Cell", CellNode);
-	lib.addNode("solidcell", "Solid Cell", SolidCellNode);
-	lib.addNode("linecell", "Line Cell", LineCellNode);
-	lib.addNode("circle", "Circle", CircleNode);
-	lib.addNode("polygon", "Polygon", PolygonNode);
-	lib.addNode("blend", "Blend", BlendNode);
-	lib.addNode("invert", "Invert", InvertNode);
-	lib.addNode("warp", "Warp", WarpNodeV2);
-	lib.addNode("color", "Color", ColorNode);
-	lib.addNode("colorize", "Colorize", ColorizeNode);
-	lib.addNode("simplexnoise", "Simplex Noise", SimplexNoiseNode);
-	lib.addNode("mask", "Mask", MaskNode);
-	lib.addNode("transform2d", "Transform2D", Transform2DNodeV2);
-	lib.addNode("maprange", "Map Range", MapRangeNode);
-	lib.addNode("splat", "Splat", SplatNodeV2);
-	lib.addNode("perlin3d", "Perlin 3D", Perlin3DNode);
-	lib.addNode("hexagon", "Hexagon", HexagonNode);
-	lib.addNode("fractalnoise", "Fractal Noise", FractalNoiseNode);
-	lib.addNode("tile", "Tile", TileNode);
-	lib.addNode("threshold", "Threshold", ThresholdNode);
-	lib.addNode("heightshift", "Height Shift", HeightShiftNode);
-	lib.addNode("checkerboard", "CheckerBoard", CheckerBoardNode);
-	lib.addNode("directionalwarp", "Directional Warp", DirectionalWarpNodeV2);
-	lib.addNode("mirror", "Mirror", MirrorNode);
-	lib.addNode(
-		"brightnesscontrast",
-		"Brightness Contrast",
-		BrightnessContrastNode
-	);
-	lib.addNode("wave", "Wave", WaveNode);
-	lib.addNode("copy", "Copy", CopyNode);
-	lib.addNode("gradient", "Gradient", GradientNode);
-	lib.addNode("trigradient", "TriGradient", TriGradientNode);
-	lib.addNode("output", "Output", OutputNode);
-	lib.addNode("gradientmap", "Gradient Map", GradientMapNode);
-	lib.addNode("blurv2", "Blur", BlurV2);
-	lib.addNode("slopeblur", "Slope Blur", SlopeBlur);
-	lib.addNode("advancesplatter", "Advance Splatter", AdvanceSplatterV2);
-	lib.addNode("tilesampler", "Tile Sampler", TileSampler);
-	lib.addNode("gradientdynamic", "Gradient Dynamic", GradientDynamic);
-	lib.addNode("clamp", "Clamp", Clamp);
-	lib.addNode("pow", "Pow", Pow);
-	lib.addNode("quantize", "Quantize", Quantize);
-	lib.addNode("histogramshift", "Histogram Shift", HistogramShift);
-	lib.addNode("histogramscan", "Histogram Scan", HistogramScan);
-	lib.addNode("histogramselect", "Histogram Select", HistogramSelect);
-	lib.addNode("skew", "Skew", Skew);
-	lib.addNode("bevel", "Bevel", Bevel);
-	lib.addNode("floodfill", "Flood Fill", FloodFill);
-	lib.addNode("floodfilltocolor", "Flood Fill To Color", FloodFillToColor);
-	lib.addNode("floodfilltobbox", "Flood Fill To BBox", FloodFillToBBox);
-	lib.addNode(
-		"floodfilltorandomcolor",
-		"Flood Fill To Random Color",
-		FloodFillToRandomColor
-	);
-	lib.addNode(
-		"floodfilltorandomintensity",
-		"Flood Fill To Random Intensity",
-		FloodFillToRandomIntensity
-	);
-	lib.addNode("floodfillsampler", "Flood Fill Sampler", FloodFillSampler);
-	lib.addNode(
-		"floodfilltogradient",
-		"Flood Fill To Gradient",
-		FloodFillToGradient
-	);
-	lib.addNode("stripes", "Stripes", StripesNode);
-	lib.addNode("rgbamerge", "RGBA Merge", RgbaMerge);
-	lib.addNode("rgbashuffle", "RGBA Shuffle", RgbaShuffle);
-	lib.addNode("extractchannel", "Extract Channel", ExtractChannel);
-	lib.addNode("grayscale", "Grayscale", Grayscale);
-	lib.addNode("invertnormal", "Invert Normal", InvertNormal);
-	lib.addNode("capsule", "Capsule", CapsuleNode);
-	lib.addNode("cartesiantopolar", "Cartesian to Polar", CartesianToPolar);
-	lib.addNode("polartocartesian", "Polar to Cartesian", PolarToCartesian);
-	lib.addNode("combinenormals", "Combine Normals", CombineNormals);
-	lib.addNode("softflower", "Soft Flower", SoftFlower);
-	lib.addNode("star", "Star", Star);
-	lib.addNode("hslextract", "HSL Extract", HslExtract);
-	lib.addNode("hsl", "HSL", Hsl);
-	lib.addNode("directionalblur", "Directional Blur", DirectionalBlur);
-	lib.addNode("anisotropic", "Anisotropic Blur", AnisotropicBlur);
-	lib.addNode("circularsplatter", "Circular Splatter", CircularSplatter);
-	lib.addNode("valuenoise", "Value Noise", ValueNoise);
-	lib.addNode("gradientnoise", "Gradient Noise", GradientNoise);
-	lib.addNode(
-		"gradientnoisefractalsum",
-		"Gradient Noise Fractal Sum",
-		GradientNoiseFractalSum
-	);
-	lib.addNode(
-		"valuenoisefractalsum",
-		"Value Noise Fractal Sum",
-		ValueNoiseFractalSum
-	);
-	lib.addNode(
-		"valuenoisefractalsum",
-		"Value Noise Fractal Sum",
-		ValueNoiseFractalSum
-	);
-	lib.addNode("image", "Image", ImageNode);
-	//lib.addNode("simplexnoise", "Simplex Noise", SimplexNoiseV2);
-	// lib.addNode("betterwarp", "Better Warp", BetterWarpNode);
-
-	return lib;
-}
diff --git a/src/lib/library/v0/nodes.ts b/src/lib/library/v0/nodes.ts
deleted file mode 100644
index 99288807..00000000
--- a/src/lib/library/v0/nodes.ts
+++ /dev/null
@@ -1,415 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class TestGradientNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Gradient Node";
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            return vec4(uv.x, 0, uv.y, 1);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class TestInvertNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Invert";
-
-		this.addInput("color");
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 col = vec4(1.0) - texture(color,uv);
-            col.a = 1.0;
-            return col;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class TestMultiplyNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Multiply";
-
-		this.addInput("colorA");
-		this.addInput("colorB");
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 colA = texture(colorA,uv);
-            vec4 colB = texture(colorB,uv);
-            return colA * colB;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class TestShapeNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Shape";
-		//this.exportName = "result";
-
-		const source = `
-        #define PI 3.14159265359
-        #define TWO_PI 6.28318530718
-
-        vec4 process(vec2 uv)
-        {
-            vec3 color = vec3(0.0);
-            float d = 0.0;
-
-            float scale = 0.5;
-            vec2 st = (uv - vec2(0.5,0.5));
-            int N = 8;
-
-            // Angle and radius from the current pixel
-            float a = atan(st.x,st.y)+PI;
-            float r = TWO_PI/float(N);
-
-            // Shaping function that modulate the distance
-            d = cos(floor(.9+a/r)*r-a)*length(st) * (1.0 / scale);
-
-            color = vec3(1.0-smoothstep(.5,.500001,d));
-
-            return vec4(color,1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class TestWorleyNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Worley";
-		//this.exportName = "result";
-
-		this.addFloatProperty("scale", "Cell Scale", 5, 1, 20);
-
-		const source = `
-        vec3 mod289(vec3 x) {
-            return x - floor(x * (1.0 / 289.0)) * 289.0;
-          }
-          
-          vec2 mod289(vec2 x) {
-            return x - floor(x * (1.0 / 289.0)) * 289.0;
-          }
-          
-          // Modulo 7 without a division
-          vec3 mod7(vec3 x) {
-            return x - floor(x * (1.0 / 7.0)) * 7.0;
-          }
-          
-          // Permutation polynomial: (34x^2 + x) mod 289
-          vec3 permute(vec3 x) {
-            return mod289((34.0 * x + 1.0) * x);
-          }
-          
-          // Cellular noise, returning F1 and F2 in a vec2.
-          // Standard 3x3 search window for good F1 and F2 values
-          vec2 cellular(vec2 P) {
-          #define K 0.142857142857 // 1/7
-          #define Ko 0.428571428571 // 3/7
-          #define jitter 1.0 // Less gives more regular pattern
-              vec2 Pi = mod289(floor(P));
-               vec2 Pf = fract(P);
-              vec3 oi = vec3(-1.0, 0.0, 1.0);
-              vec3 of = vec3(-0.5, 0.5, 1.5);
-              vec3 px = permute(Pi.x + oi);
-              vec3 p = permute(px.x + Pi.y + oi); // p11, p12, p13
-              vec3 ox = fract(p*K) - Ko;
-              vec3 oy = mod7(floor(p*K))*K - Ko;
-              vec3 dx = Pf.x + 0.5 + jitter*ox;
-              vec3 dy = Pf.y - of + jitter*oy;
-              vec3 d1 = dx * dx + dy * dy; // d11, d12 and d13, squared
-              p = permute(px.y + Pi.y + oi); // p21, p22, p23
-              ox = fract(p*K) - Ko;
-              oy = mod7(floor(p*K))*K - Ko;
-              dx = Pf.x - 0.5 + jitter*ox;
-              dy = Pf.y - of + jitter*oy;
-              vec3 d2 = dx * dx + dy * dy; // d21, d22 and d23, squared
-              p = permute(px.z + Pi.y + oi); // p31, p32, p33
-              ox = fract(p*K) - Ko;
-              oy = mod7(floor(p*K))*K - Ko;
-              dx = Pf.x - 1.5 + jitter*ox;
-              dy = Pf.y - of + jitter*oy;
-              vec3 d3 = dx * dx + dy * dy; // d31, d32 and d33, squared
-              // Sort out the two smallest distances (F1, F2)
-              vec3 d1a = min(d1, d2);
-              d2 = max(d1, d2); // Swap to keep candidates for F2
-              d2 = min(d2, d3); // neither F1 nor F2 are now in d3
-              d1 = min(d1a, d2); // F1 is now in d1
-              d2 = max(d1a, d2); // Swap to keep candidates for F2
-              d1.xy = (d1.x < d1.y) ? d1.xy : d1.yx; // Swap if smaller
-              d1.xz = (d1.x < d1.z) ? d1.xz : d1.zx; // F1 is in d1.x
-              d1.yz = min(d1.yz, d2.yz); // F2 is now not in d2.yz
-              d1.y = min(d1.y, d1.z); // nor in  d1.z
-              d1.y = min(d1.y, d2.x); // F2 is in d1.y, we're done.
-              return sqrt(d1.xy);
-          }
-
-          vec4 process(vec2 uv)
-          {
-              float scale = 7.0;
-              //vec2 cel = cellular(uv*vec2(scale));
-              vec2 cel = cellular(uv*vec2(prop_scale));
-              return vec4(vec3(cel.y - cel.x),1.0);
-          }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-// http://www.smart-page.net/smartnormal/js/SmartNormalMapFilter.js
-export class TestNormalNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Normal Map";
-		//this.exportName = "result";
-		this.addInput("height");
-
-		this.addFloatProperty("strength", "Strength", 1, 0, 10, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            //vec2 size = textureSize(height);
-            vec2 size = vec2(1024,1024); // quick hack for now
-            vec2 step = vec2(1.0,1.0)/size;
-
-            // center point
-            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r);
-
-            // sample horizontally
-            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r);
-            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r);
-
-            // sample vertically
-            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r);
-            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r);
-
-            // find diff horizontally and average
-            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
-
-            // find diff vertically and average
-            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
-
-            // calculate normal
-            //float strength = 0.05;
-            //float strength = (10.0-prop_strength) * 0.01;
-            vec3 normal = normalize(vec3(dx * prop_strength, dy * prop_strength, 1.0));
-            vec3 final = normal.xyz * 0.5 + 0.5; // bring to 0.0 - 1.0 range
-
-            return vec4(final, 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class TestWarpNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Warp";
-
-		this.addInput("inputImage");
-		this.addInput("height");
-
-		this.addFloatProperty("strength", "Strength", 1, 0, 100, 0.01);
-
-		// calculates normal, then warps uv by it
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            //vec2 size = textureSize(height);
-            vec2 size = vec2(1024,1024); // quick hack for now
-            vec2 step = vec2(1.0,1.0)/size;
-
-            // center point
-            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r);
-
-            // sample horizontally
-            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r);
-            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r);
-
-            // sample vertically
-            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r);
-            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r);
-
-            // find diff horizontally and average
-            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
-
-            // find diff vertically and average
-            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
-
-            // calculate normal
-            //float strength = 0.05;
-            //float strength = (10.0-prop_strength) * 0.01;
-            vec2 offset = vec2(dx, dy);
-            
-            vec4 color = texture(inputImage, uv + offset * prop_strength);
-
-            return color;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-// https://thebookofshaders.com/11/
-export class TestSimplexNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Simplex Noise";
-
-		this.addFloatProperty("scale", "Scale", 100, 1, 1000, 0.01);
-
-		const source = `
-        float random (in vec2 st) {
-            return fract(sin(dot(st.xy,
-                                 vec2(12.9898,78.233)))
-                         * 43758.5453123);
-        }
-
-        float noise (in vec2 st) {
-            vec2 i = floor(st);
-            vec2 f = fract(st);
-        
-            // Four corners in 2D of a tile
-            float a = random(i);
-            float b = random(i + vec2(1.0, 0.0));
-            float c = random(i + vec2(0.0, 1.0));
-            float d = random(i + vec2(1.0, 1.0));
-        
-            // Smooth Interpolation
-        
-            // Cubic Hermine Curve.  Same as SmoothStep()
-            vec2 u = f*f*(3.0-2.0*f);
-            // u = smoothstep(0.,1.,f);
-        
-            // Mix 4 coorners porcentages
-            return mix(a, b, u.x) +
-                    (c - a)* u.y * (1.0 - u.x) +
-                    (d - b) * u.x * u.y;
-        }
-
-        vec2 skew (vec2 st) {
-            vec2 r = vec2(0.0);
-            r.x = 1.1547*st.x;
-            r.y = st.y+0.5*r.x;
-            return r;
-        }
-        
-        vec3 simplexGrid (vec2 st) {
-            vec3 xyz = vec3(0.0);
-        
-            vec2 p = fract(skew(st));
-            if (p.x > p.y) {
-                xyz.xy = 1.0-vec2(p.x,p.y-p.x);
-                xyz.z = p.y;
-            } else {
-                xyz.yz = 1.0-vec2(p.x-p.y,p.y);
-                xyz.x = p.x;
-            }
-        
-            return fract(xyz);
-        }
-
-        vec4 process(vec2 uv)
-        {
-            vec3 color = vec3(noise(uv * prop_scale));
-
-            return vec4(color,1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class TestBrickNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Brick";
-
-		this.addIntProperty("widthX", "Width X", 3, 0, 10, 1);
-		this.addIntProperty("widthY", "Width Y", 6, 0, 10, 1);
-
-		this.addFloatProperty("holeX", "Hole X", 2, 1, 10, 0.01);
-		this.addFloatProperty("holeY", "Hole Y", 2, 1, 10, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            float u = uv.x;
-            float v = uv.y;
-
-            float widthX = float(prop_widthX);
-            float widthY = float(prop_widthY);
-            float shiftX = 0.5;
-            float shiftRandWeight = 0.0;
-            //float holeX = 0.03;
-            float holeX = prop_holeX / 100.0;
-            //float holeY = 0.03;
-            float holeY = prop_holeY / 100.0;
-            //float smooth = 0.05;
-            float smooth = 0.01;
-
-            float normX = widthX;
-            float normY = widthY;
-            float uu = u * normX;
-            float vv = v * normY;
-
-            float y = vv - floor(vv);
-
-            if (vv >= normY) vv -= normY;
-            if (uu >= normX) uu -= normX;
-            
-            float by = floor(vv);
-
-            if ((vv * 0.5 - floor(vv * 0.5)) >= 0.5)
-                uu += shiftX;
-            
-            if (uu >= normX) uu -= normX;
-
-            float bx = floor(uu);
-
-            float x = uu - floor(uu);
-
-            float val = 1.0;
-
-            bool inside = true;
-            if (holeX > 0.0) inside = inside && (x > (holeX * normX));
-            if (holeY > 0.0) inside = inside && (y > (holeY * normY));
-
-            if (inside) {
-                float dist = min(min(x -holeX*normX, 1.0 - x)/normX, min(y - holeY*normY, 1.0 - y)/normY);
-                dist *= min(normX, normY);
-                
-                if (dist < smooth) {
-                    val = val * dist/smooth;
-                }
-            } else val = 0.0;
-
-            vec4 color;
-            color.r = val;
-            color.g = val;
-            color.b = val;
-            color.a = 1.0;
-
-            return color;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/brickgenerator.ts b/src/lib/library/v1/brickgenerator.ts
deleted file mode 100644
index 2c90d8e4..00000000
--- a/src/lib/library/v1/brickgenerator.ts
+++ /dev/null
@@ -1,139 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class BrickGeneratorNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Brick Generator";
-
-		this.addFloatProperty("rows", "Rows", 6, 1, 20, 1);
-		this.addFloatProperty("columns", "Columns", 6, 1, 20, 1);
-
-		this.addFloatProperty("offset", "Offset", 0.5, 0, 1, 0.1);
-
-		// brick size
-		const sizeProps = this.createGroup("Size");
-		sizeProps.collapsed = false;
-		sizeProps.add(
-			this.addFloatProperty("brickWidth", "Brick Width", 0.9, 0, 1, 0.01)
-		);
-		sizeProps.add(
-			this.addFloatProperty("brickHeight", "Brick Height", 0.9, 0, 1, 0.01)
-		);
-
-		// height
-		const heightProps = this.createGroup("Height");
-		heightProps.collapsed = false;
-		heightProps.add(
-			this.addFloatProperty("heightMin", "Height Min", 0.0, 0, 1, 0.05)
-		);
-		heightProps.add(
-			this.addFloatProperty("heightMax", "Height Max", 1.0, 0, 1, 0.05)
-		);
-		heightProps.add(
-			this.addFloatProperty("heightBalance", "Height Balance", 1.0, 0, 1, 0.05)
-		);
-		heightProps.add(
-			this.addFloatProperty("heightVariance", "Height Variance", 0, 0, 1, 0.05)
-		);
-
-		const source = `
-        //vec2 brickSize = vec2(prop_brickWidth, prop_brickHeight);
-        //vec2 tileSize = vec2(prop_rows, prop_columns);
-
-        // float shiftX = 0.5;
-        // float shiftY = 0.0;
-
-        // offset for alternating rows
-        //float offset = prop_offset;
-
-        // HEIGHT FUNCTIONS
-        float calculateHeight(vec2 brickId)
-        {
-            // height
-            float heightMin = prop_heightMin;
-            float heightMax = prop_heightMax;
-            float heightBalance= prop_heightBalance; // threshold that decides whether to use height variance or not
-            float heightVariance = prop_heightVariance; // multiplies the heightMax-heightMin range
-
-
-            // check whether or not there should be a height range in the first place
-            float balRand = _rand(vec2(_seed) + brickId * vec2(0.01));
-            
-            // if balRand is less than heightBalance it means it qualifies for a random
-            // height. This way if heightBalance is 0 then we only use the min luminance
-            if( balRand > heightBalance) {
-                return 1.0;
-            }
-            
-            // calculate height variance
-            // need to offset brickId to give new random result
-            float randVariance = _rand(vec2(_seed) + (brickId + vec2(1) ) * vec2(0.01));
-            randVariance *= heightVariance;
-            
-            float range = (heightMax - heightMin);
-            float height = heightMax - 
-                        range * randVariance;
-            
-            return height;
-        }
-
-        // slope
-        // float slopeX;// slope x direction
-        // float slopeY;// slope y direction
-        // float slopeBalance;// threshold that determines whether or not to use slope
-        // float slopeVariation;// decreases the range of the slope
-            
-        vec2 is_brick(vec2 pos)
-        {
-            vec2 brickSize = vec2(prop_brickWidth, prop_brickHeight);
-
-            vec2 edgeSize = (vec2(1.0) - brickSize) * vec2(0.5);
-            vec2 brick = vec2(0.0);
-            
-            if (pos.x > edgeSize.x && pos.x < (1.0 - edgeSize.x))
-                brick.x = 1.0;
-                
-            if (pos.y > edgeSize.y && pos.y < (1.0 - edgeSize.y))
-                brick.y = 1.0;
-                
-            return brick;
-        }
-
-        vec4 process(vec2 uv)
-        {
-            vec2 tileSize = vec2(prop_columns, prop_rows);
-            float offset = prop_offset;
-
-            //vec2 pos = uv * vec2(5);
-            vec2 pos = uv * tileSize;
-            
-            float xOffset = 0.0;
-            if (fract(pos.y * 0.5) > 0.5) {
-                xOffset = offset;
-            }
-            pos.x += xOffset;
-            
-            // a brick's id would be floor(pos)
-            // this gives us its origin
-            // this can act as a random seed for the entire brick
-            vec2 brickId = floor(pos);// - vec2(xOffset, 0);
-
-            // wrap around x
-            if (brickId.x > tileSize.x-1.0)
-                brickId.x = 0.0;
-
-            //float lum = _rand(vec2(_seed) + brickId * vec2(0.01));
-            //float lum = randomFloat(0);
-            float lum = calculateHeight(brickId);
-            pos = fract(pos);
-            
-            //vec2 isBrick = step(pos,vec2(0.95,0.9));
-            vec2 isBrick =is_brick(pos);
-
-            
-            return vec4(vec3(isBrick.x * isBrick.y * lum),1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/brightnesscontrast.ts b/src/lib/library/v1/brightnesscontrast.ts
deleted file mode 100644
index 4173b1c6..00000000
--- a/src/lib/library/v1/brightnesscontrast.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-// https://github.com/evanw/glfx.js/blob/master/src/filters/adjust/brightnesscontrast.js
-export class BrightnessContrastNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Brightness Contrast";
-
-		this.addInput("image");
-
-		this.addFloatProperty("contrast", "Contrast", 0.0, -1, 1, 0.1);
-		this.addFloatProperty("brightness", "Brightness", 0.0, -1, 1, 0.1);
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 col = texture(image, uv);
-
-            col.rgb += prop_brightness;
-            if (prop_contrast > 0.0)
-                col.rgb = (col.rgb - 0.5) / (1.0 - prop_contrast) + 0.5;
-            else
-                col.rgb = (col.rgb - 0.5) * (1.0 + prop_contrast) + 0.5;
-
-            return col;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/checkerboard.ts b/src/lib/library/v1/checkerboard.ts
deleted file mode 100644
index 8254f498..00000000
--- a/src/lib/library/v1/checkerboard.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-
-// https://stackoverflow.com/questions/4694608/glsl-checkerboard-pattern
-export class CheckerBoardNode extends GpuDesignerNode {
-	public init() {
-		this.title = "CheckerBoard";
-
-		this.addFloatProperty("rows", "Rows", 2, 1, 20, 1);
-		this.addFloatProperty("columns", "Columns", 2, 1, 20, 1);
-
-		this.addColorProperty("color", "Color", new Color());
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            if ((mod(prop_columns*uv.x, 1.0) < 0.5) ^^ (mod(prop_rows*uv.y, 1.0) < 0.5))
-            {
-                return vec4(prop_color.rgb, 1.0);
-            }
-            else
-            {
-                return vec4(1.0, 1.0, 1.0, 1.0);
-            }
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/color.ts b/src/lib/library/v1/color.ts
deleted file mode 100644
index 4f96ba13..00000000
--- a/src/lib/library/v1/color.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-
-export class ColorizeNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Colorize";
-
-		this.addInput("image");
-
-		this.addColorProperty("color", "Color", new Color());
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            return texture(image,uv) * prop_color;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class ColorNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Color";
-
-		this.addColorProperty("color", "Color", new Color());
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            return prop_color;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/copy.ts b/src/lib/library/v1/copy.ts
deleted file mode 100644
index 8af68e78..00000000
--- a/src/lib/library/v1/copy.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class CopyNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Copy";
-
-		this.addInput("image");
-		this.addStringProperty("name", "Name");
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 col = texture(image, uv);
-            return col;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/directionalwarp.ts b/src/lib/library/v1/directionalwarp.ts
deleted file mode 100644
index d14151d7..00000000
--- a/src/lib/library/v1/directionalwarp.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class DirectionalWarpNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Directional Warp";
-
-		this.addInput("inputImage");
-		this.addInput("height");
-
-		this.addFloatProperty("intensity", "Intensity", 0.1, -0.5, 0.5, 0.01);
-		this.addFloatProperty("angle", "Angle", 0.85, 0.0, 3.142, 0.01);
-
-		// calculates normal, then warps uv by it
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec2 step = vec2(1.0,1.0)/_textureSize;
-
-            vec2 dir = normalize(vec2(cos(prop_angle), sin(prop_angle)));
-
-            // center point
-            float dist = abs(texture(height, uv).r) - 0.5;
-            
-            vec4 color = texture(inputImage, uv + dir * prop_intensity * dist);
-
-            return color;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/gradient.ts b/src/lib/library/v1/gradient.ts
deleted file mode 100644
index ed93afc0..00000000
--- a/src/lib/library/v1/gradient.ts
+++ /dev/null
@@ -1,204 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-
-export class GradientNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Gradient";
-
-		const white = new Color();
-		white.r = 1;
-		white.g = 1;
-		white.b = 1;
-
-		this.addColorProperty("colorA", "Color A", Color.parse("#000000"));
-		this.addFloatProperty("posA", "Position A", 0, 0, 1, 0.01);
-		this.addColorProperty("colorB", "Color B", white);
-		this.addFloatProperty("posB", "Position B", 1, 0, 1, 0.01);
-
-		this.addEnumProperty("mode", "Gradient Direction", [
-			"Left To Right",
-			"Right To Left",
-			"Top To Bottom",
-			"Bottom To Top"
-		]);
-
-		const source = `
-        #define POINTS_MAX 32
-
-        // assumes points are sorted
-        vec3 calcGradient(float t, vec3 colors[POINTS_MAX], float positions[POINTS_MAX], int numPoints)
-        {
-            if (numPoints == 0)
-                return vec3(1,0,0);
-            
-            if (numPoints == 1)
-                return colors[0];
-            
-            // here at least two points are available
-            if (t < positions[0])
-                return colors[0];
-            
-            int last = numPoints - 1;
-            if (t > positions[last])
-                return colors[last];
-            
-            // find two points in-between and lerp
-            
-            for(int i = 0; i < numPoints-1;i++) {
-                if (positions[i+1] > t) {
-                    vec3 colorA = colors[i];
-                    vec3 colorB = colors[i+1];
-                    
-                    float t1 = positions[i];
-                    float t2 = positions[i+1];
-                    
-                    float lerpPos = (t - t1)/(t2 - t1);
-                    return mix(colorA, colorB, lerpPos);
-                    
-                }
-                
-            }
-            
-            return vec3(0,0,0);
-        }
-
-
-        vec4 process(vec2 uv)
-        {
-            float t = 0.0;
-    
-            // left to right
-            if (prop_mode == 0)
-                t = uv.x;
-            // right to left
-            else if (prop_mode == 1)
-                t = 1.0 - uv.x;
-            // top to bottom
-            else if (prop_mode == 2)
-                t = 1.0 - uv.y;
-            // bottom to top
-            else if (prop_mode == 3)
-                t = uv.y;
-
-
-            vec3 colors[POINTS_MAX];
-            colors[0] = prop_colorA.rgb;
-            colors[1] = prop_colorB.rgb;
-            float positions[POINTS_MAX];
-            positions[0] = prop_posA;
-            positions[1] = prop_posB;
-                
-            
-            vec3 col = calcGradient(t, colors, positions, 2);
-            
-            return vec4(col,1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class TriGradientNode extends GpuDesignerNode {
-	public init() {
-		this.title = "TriGradient";
-
-		const white = new Color();
-		white.r = 1;
-		white.g = 1;
-		white.b = 1;
-
-		this.addColorProperty("colorA", "Color A", Color.parse("#000000"));
-		this.addFloatProperty("posA", "Position A", 0, 0, 1, 0.01);
-
-		this.addColorProperty("colorB", "Color B", white);
-		this.addFloatProperty("posB", "Position B", 0.5, 0, 1, 0.01);
-
-		this.addColorProperty("colorC", "Color C", Color.parse("#000000"));
-		this.addFloatProperty("posC", "Position C", 1, 0, 1, 0.01);
-
-		this.addEnumProperty("mode", "Gradient Direction", [
-			"Left To Right",
-			"Right To Left",
-			"Top To Bottom",
-			"Bottom To Top"
-		]);
-
-		const source = `
-          #define POINTS_MAX 32
-  
-          // assumes points are sorted
-          vec3 calcGradient(float t, vec3 colors[POINTS_MAX], float positions[POINTS_MAX], int numPoints)
-          {
-              if (numPoints == 0)
-                  return vec3(1,0,0);
-              
-              if (numPoints == 1)
-                  return colors[0];
-              
-              // here at least two points are available
-              if (t < positions[0])
-                  return colors[0];
-              
-              int last = numPoints - 1;
-              if (t > positions[last])
-                  return colors[last];
-              
-              // find two points in-between and lerp
-              
-              for(int i = 0; i < numPoints-1;i++) {
-                  if (positions[i+1] > t) {
-                      vec3 colorA = colors[i];
-                      vec3 colorB = colors[i+1];
-                      
-                      float t1 = positions[i];
-                      float t2 = positions[i+1];
-                      
-                      float lerpPos = (t - t1)/(t2 - t1);
-                      return mix(colorA, colorB, lerpPos);
-                      
-                  }
-                  
-              }
-              
-              return vec3(0,0,0);
-          }
-  
-  
-          vec4 process(vec2 uv)
-          {
-              float t = 0.0;
-      
-              // left to right
-              if (prop_mode == 0)
-                  t = uv.x;
-              // right to left
-              else if (prop_mode == 1)
-                  t = 1.0 - uv.x;
-              // top to bottom
-              else if (prop_mode == 2)
-                  t = 1.0 - uv.y;
-              // bottom to top
-              else if (prop_mode == 3)
-                  t = uv.y;
-  
-  
-              vec3 colors[POINTS_MAX];
-              colors[0] = prop_colorA.rgb;
-              colors[1] = prop_colorB.rgb;
-              colors[2] = prop_colorC.rgb;
-              float positions[POINTS_MAX];
-              positions[0] = prop_posA;
-              positions[1] = prop_posB;
-              positions[2] = prop_posC;
-                  
-              
-              vec3 col = calcGradient(t, colors, positions, 3);
-              
-              return vec4(col,1.0);
-          }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/gradientmap.ts b/src/lib/library/v1/gradientmap.ts
deleted file mode 100644
index a3d9f627..00000000
--- a/src/lib/library/v1/gradientmap.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
-
-export class GradientMapNode extends GpuDesignerNode {
-	public init() {
-		this.title = "GradientMap";
-
-		this.addInput("inputImage");
-
-		this.addGradientProperty("gradient", "Gradient", Gradient.default());
-
-		const source = `
-        float grayscale(vec3 col)
-        {
-            return (col.r + col.g + col.b) / 3.0;
-        }
-
-        vec4 process(vec2 uv)
-        {
-            // grayscale input color
-            float t = grayscale(texture(inputImage, uv).rgb);
-            vec3 col = sampleGradient(prop_gradient, t);
-            
-            return vec4(col, 1.0);
-        }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/heightshift.ts b/src/lib/library/v1/heightshift.ts
deleted file mode 100644
index ecdc0cca..00000000
--- a/src/lib/library/v1/heightshift.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class HeightShiftNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Height Shift";
-
-		this.addInput("image");
-
-		this.addFloatProperty("shift", "Shift", 0.0, -1.0, 1.0, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 a =  texture(image, uv);
-
-            return a + vec4(vec3(prop_shift), 0.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/invert.ts b/src/lib/library/v1/invert.ts
deleted file mode 100644
index 2e298d44..00000000
--- a/src/lib/library/v1/invert.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class InvertNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Invert";
-
-		this.addInput("color");
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 col = vec4(1.0) - texture(color,uv);
-            col.a = 1.0;
-            return col;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/maprange.ts b/src/lib/library/v1/maprange.ts
deleted file mode 100644
index b5b0577a..00000000
--- a/src/lib/library/v1/maprange.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class MapRangeNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Map Range";
-
-		this.addInput("color");
-		this.addFloatProperty("in_min", "Input Minimum", 0, 0, 1.0, 0.01);
-		this.addFloatProperty("in_max", "Input Maximum", 1, 0, 1.0, 0.01);
-		this.addFloatProperty("out_min", "Output Minimum", 0, 0, 1.0, 0.01);
-		this.addFloatProperty("out_max", "Output Maximum", 1, 0, 1.0, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 col = texture(color,uv);
-
-            // color range coming in
-            float inDiff = prop_in_max - prop_in_min;
-            col = (col-prop_in_min) / inDiff;
-
-
-            float outDiff = prop_out_max - prop_out_min;
-            col.rgb = prop_out_min + col.rgb * vec3(outDiff);
-            return col;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/normalmap.ts b/src/lib/library/v1/normalmap.ts
deleted file mode 100644
index 8f0b3b59..00000000
--- a/src/lib/library/v1/normalmap.ts
+++ /dev/null
@@ -1,109 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-// http://www.smart-page.net/smartnormal/js/SmartNormalMapFilter.js
-export class NormalMapNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Normal Map";
-		//this.exportName = "result";
-		this.addInput("height");
-
-		this.addFloatProperty("strength", "Strength", 0.02, -0.02, 0.02, 0.00001);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            //vec2 size = textureSize(height);
-            //vec2 size = vec2(1024,1024); // quick hack for now
-            vec2 step = vec2(1.0,1.0)/_textureSize;
-
-            // center point
-            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r) * prop_strength / 2.0;
-
-            // sample horizontally
-            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r) * prop_strength / 2.0;
-            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r) * prop_strength / 2.0;
-
-            // sample vertically
-            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r) * prop_strength / 2.0;
-            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r) * prop_strength / 2.0;
-
-            // find diff horizontally and average
-            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
-
-            // find diff vertically and average
-            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
-
-            // calculate normal
-            //vec3 normal = normalize(vec3(dx * prop_strength, dy * prop_strength, 1.0));
-            //vec3 normal = normalize(vec3(dx, dy, 1.0));
-            //vec3 final = normal.xyz * 0.5 + 0.5; // bring to 0.0 - 1.0 range
-
-            vec3 dvx = vec3(step.x, 0.0       , d1-d0);
-            vec3 dvy = vec3(0.0       , step.y, d3-d0);
-            vec3 normal = normalize(cross(dvx, dvy));
-            vec3 final = normal.xyz * 0.5 + 0.5;
-
-            return vec4(final, 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class BetterWarpNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Better Warp Node";
-		//this.exportName = "result";
-		this.addInput("image");
-		this.addInput("height");
-
-		this.addFloatProperty("strength", "Strength", 0.001, -0.02, 0.02, 0.00001);
-		this.addFloatProperty("spread", "Spread", 0.1, 0, 1, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            //vec2 size = textureSize(height);
-            //vec2 size = vec2(1024,1024); // quick hack for now
-            vec2 step = vec2(1.0,1.0)/_textureSize;
-
-            // center point
-            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r) * prop_strength / 2.0;
-
-            // sample horizontally
-            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r) * prop_strength / 2.0;
-            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r) * prop_strength / 2.0;
-
-            // sample vertically
-            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r) * prop_strength / 2.0;
-            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r) * prop_strength / 2.0;
-
-            // find diff horizontally and average
-            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
-
-            // find diff vertically and average
-            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
-
-            // calculate normal
-            //vec3 normal = normalize(vec3(dx * prop_strength, dy * prop_strength, 1.0));
-            //vec3 normal = normalize(vec3(dx, dy, 1.0));
-            //vec3 final = normal.xyz * 0.5 + 0.5; // bring to 0.0 - 1.0 range
-
-            vec3 dvx = vec3(step.x, 0.0       , d1-d0);
-            vec3 dvy = vec3(0.0       , step.y, d3-d0);
-            vec3 normal = normalize(cross(dvx, dvy));
-            //vec3 final = normal.xyz * 0.5 + 0.5;
-
-            float intensity = (1.0 - texture(height, uv).r) * prop_spread;
-            vec3 colorOut = texture(image, uv + vec2(-normal.x * intensity, -normal.y * intensity) ).rgb;
-
-            return vec4(colorOut, 1.0);
-            //return vec4(vec3(normal.y), 1.0);
-            //return vec4(vec3(dot(normal, vec3(0,0,1))), 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/output.ts b/src/lib/library/v1/output.ts
deleted file mode 100644
index 8a630805..00000000
--- a/src/lib/library/v1/output.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-
-export class OutputNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Output";
-
-		this.addInput("image");
-		this.addStringProperty("name", "Output Name");
-		this.addEnumProperty("components", "Components", [
-			"RGBA",
-			"RGB",
-			"R",
-			"G",
-			"B",
-			"A"
-		]);
-
-		this.addEnumProperty("precision", "Precision", [
-			"8 Bits Per Component",
-			"16 Bits Per Component"
-		]);
-		this.addColorProperty("color", "Default Color", new Color());
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 col;
-            if (image_connected) {
-              col = vec4(0,1,0,1);
-              col = texture(image, uv);
-            //   return texture(image, uv);
-            } else {
-              col = prop_color;
-            //   return prop_color;
-            }
-
-			if(prop_components == 2) col.rgb = vec3(col.r);
-			if(prop_components == 3) col.rgb = vec3(col.g);
-			if(prop_components == 4) col.rgb = vec3(col.b);
-			if(prop_components == 5) col.rgb = vec3(col.a);
-
-            return col;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/perlin3d.ts b/src/lib/library/v1/perlin3d.ts
deleted file mode 100644
index cb08f4f7..00000000
--- a/src/lib/library/v1/perlin3d.ts
+++ /dev/null
@@ -1,182 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class Perlin3DNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Perlin 3D";
-
-		const source = `
-        vec3 mod289(vec3 x)
-{
-  return x - floor(x * (1.0 / 289.0)) * 289.0;
-}
-
-vec4 mod289(vec4 x)
-{
-  return x - floor(x * (1.0 / 289.0)) * 289.0;
-}
-
-vec4 permute(vec4 x)
-{
-  return mod289(((x*34.0)+1.0)*x);
-}
-
-vec4 taylorInvSqrt(vec4 r)
-{
-  return 1.79284291400159 - 0.85373472095314 * r;
-}
-
-vec3 fade(vec3 t) {
-  return t*t*t*(t*(t*6.0-15.0)+10.0);
-}
-
-// Classic Perlin noise
-float cnoise(vec3 P)
-{
-  vec3 Pi0 = floor(P); // Integer part for indexing
-  vec3 Pi1 = Pi0 + vec3(1.0); // Integer part + 1
-  Pi0 = mod289(Pi0);
-  Pi1 = mod289(Pi1);
-  vec3 Pf0 = fract(P); // Fractional part for interpolation
-  vec3 Pf1 = Pf0 - vec3(1.0); // Fractional part - 1.0
-  vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
-  vec4 iy = vec4(Pi0.yy, Pi1.yy);
-  vec4 iz0 = Pi0.zzzz;
-  vec4 iz1 = Pi1.zzzz;
-
-  vec4 ixy = permute(permute(ix) + iy);
-  vec4 ixy0 = permute(ixy + iz0);
-  vec4 ixy1 = permute(ixy + iz1);
-
-  vec4 gx0 = ixy0 * (1.0 / 7.0);
-  vec4 gy0 = fract(floor(gx0) * (1.0 / 7.0)) - 0.5;
-  gx0 = fract(gx0);
-  vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);
-  vec4 sz0 = step(gz0, vec4(0.0));
-  gx0 -= sz0 * (step(0.0, gx0) - 0.5);
-  gy0 -= sz0 * (step(0.0, gy0) - 0.5);
-
-  vec4 gx1 = ixy1 * (1.0 / 7.0);
-  vec4 gy1 = fract(floor(gx1) * (1.0 / 7.0)) - 0.5;
-  gx1 = fract(gx1);
-  vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);
-  vec4 sz1 = step(gz1, vec4(0.0));
-  gx1 -= sz1 * (step(0.0, gx1) - 0.5);
-  gy1 -= sz1 * (step(0.0, gy1) - 0.5);
-
-  vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);
-  vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);
-  vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);
-  vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);
-  vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);
-  vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);
-  vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);
-  vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);
-
-  vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
-  g000 *= norm0.x;
-  g010 *= norm0.y;
-  g100 *= norm0.z;
-  g110 *= norm0.w;
-  vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
-  g001 *= norm1.x;
-  g011 *= norm1.y;
-  g101 *= norm1.z;
-  g111 *= norm1.w;
-
-  float n000 = dot(g000, Pf0);
-  float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));
-  float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));
-  float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));
-  float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));
-  float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));
-  float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));
-  float n111 = dot(g111, Pf1);
-
-  vec3 fade_xyz = fade(Pf0);
-  vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);
-  vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);
-  float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x); 
-  return 2.2 * n_xyz;
-}
-
-// Classic Perlin noise, periodic variant
-float pnoise(vec3 P, vec3 rep)
-{
-  vec3 Pi0 = mod(floor(P), rep); // Integer part, modulo period
-  vec3 Pi1 = mod(Pi0 + vec3(1.0), rep); // Integer part + 1, mod period
-  Pi0 = mod289(Pi0);
-  Pi1 = mod289(Pi1);
-  vec3 Pf0 = fract(P); // Fractional part for interpolation
-  vec3 Pf1 = Pf0 - vec3(1.0); // Fractional part - 1.0
-  vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
-  vec4 iy = vec4(Pi0.yy, Pi1.yy);
-  vec4 iz0 = Pi0.zzzz;
-  vec4 iz1 = Pi1.zzzz;
-
-  vec4 ixy = permute(permute(ix) + iy);
-  vec4 ixy0 = permute(ixy + iz0);
-  vec4 ixy1 = permute(ixy + iz1);
-
-  vec4 gx0 = ixy0 * (1.0 / 7.0);
-  vec4 gy0 = fract(floor(gx0) * (1.0 / 7.0)) - 0.5;
-  gx0 = fract(gx0);
-  vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);
-  vec4 sz0 = step(gz0, vec4(0.0));
-  gx0 -= sz0 * (step(0.0, gx0) - 0.5);
-  gy0 -= sz0 * (step(0.0, gy0) - 0.5);
-
-  vec4 gx1 = ixy1 * (1.0 / 7.0);
-  vec4 gy1 = fract(floor(gx1) * (1.0 / 7.0)) - 0.5;
-  gx1 = fract(gx1);
-  vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);
-  vec4 sz1 = step(gz1, vec4(0.0));
-  gx1 -= sz1 * (step(0.0, gx1) - 0.5);
-  gy1 -= sz1 * (step(0.0, gy1) - 0.5);
-
-  vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);
-  vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);
-  vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);
-  vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);
-  vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);
-  vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);
-  vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);
-  vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);
-
-  vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
-  g000 *= norm0.x;
-  g010 *= norm0.y;
-  g100 *= norm0.z;
-  g110 *= norm0.w;
-  vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
-  g001 *= norm1.x;
-  g011 *= norm1.y;
-  g101 *= norm1.z;
-  g111 *= norm1.w;
-
-  float n000 = dot(g000, Pf0);
-  float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));
-  float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));
-  float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));
-  float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));
-  float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));
-  float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));
-  float n111 = dot(g111, Pf1);
-
-  vec3 fade_xyz = fade(Pf0);
-  vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);
-  vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);
-  float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x); 
-  return 2.2 * n_xyz;
-}
-
-vec4 process(vec2 uv)
-{
-    float c = pnoise(vec3(uv * 10.0,10.0), vec3(10.0,10.0,10.0));
-
-    return vec4(vec3(c), 1.0);
-}
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/threshold.ts b/src/lib/library/v1/threshold.ts
deleted file mode 100644
index 7df1af5d..00000000
--- a/src/lib/library/v1/threshold.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class ThresholdNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Threshold";
-
-		this.addInput("image");
-
-		this.addFloatProperty("threshold", "Threshold", 0.0, 0.0, 1.0, 0.01);
-		this.addBoolProperty("invert", "Invert", true);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 a =  texture(image, uv);
-
-            if (prop_invert)
-                a.rgb = step(1.0 - prop_threshold, a.rgb);
-            else
-                a.rgb = step(prop_threshold, a.rgb);
-
-            return a;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/warp.ts b/src/lib/library/v1/warp.ts
deleted file mode 100644
index ad97002d..00000000
--- a/src/lib/library/v1/warp.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class WarpNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Warp";
-
-		this.addInput("inputImage");
-		this.addInput("height");
-
-		this.addFloatProperty("intensity", "Intensity", 0.1, -1.0, 1.0, 0.01);
-
-		// calculates normal, then warps uv by it
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec2 step = vec2(1.0,1.0)/_textureSize;
-            vec4 warpCol = texture(height, uv);
-            float warp = (warpCol.r + warpCol.g + warpCol.b) / 3.0;
-
-            vec4 color = texture(inputImage, uv + (vec2(warp) - 0.5) * vec2(1.0, -1.0) * prop_intensity);
-
-            return color;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v1/wave.ts b/src/lib/library/v1/wave.ts
deleted file mode 100644
index 4e3f00a0..00000000
--- a/src/lib/library/v1/wave.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class WaveNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Wave";
-
-		this.addIntProperty("xfrequency", "X Frequency", 1, 0, 20, 1);
-		this.addIntProperty("yfrequency", "Y Frequency", 0, 0, 20, 1);
-		this.addFloatProperty("phase", "Phase Offset", 0.0, 0.0, 3.142, 0.01);
-		this.addFloatProperty("amp", "Amplitude", 0.5, 0.0, 1.0, 0.01);
-
-		// calculates normal, then warps uv by it
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            float fx = uv.x * 3.142 * 2.0 * float(prop_xfrequency);
-            float fy = uv.y * 3.142 * 2.0 * float(prop_yfrequency);
-            float wave = sin(fx + fy + prop_phase) * prop_amp;
-
-            // bring wave to range 0...1
-            wave = wave * 0.5 + 0.5;
-
-            return vec4(vec3(wave), 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/bevel.ts b/src/lib/library/v2/bevel.ts
deleted file mode 100644
index 22ee3ae9..00000000
--- a/src/lib/library/v2/bevel.ts
+++ /dev/null
@@ -1,285 +0,0 @@
-import { NodeRenderContext } from "@/lib/designer";
-import { TextureDataType } from "@/lib/designer/gl";
-import { FloatProperty } from "@/lib/designer/properties";
-import { TextureDataConverter } from "@/lib/designer/texturedataconverter";
-import { DesignerNode } from "../../designer/designernode";
-
-// https://xjavascript.com/view/639466/read-pixels-in-webgltexture-rendering-webgl-to-texture
-export class Bevel extends DesignerNode {
-	f: Float64Array;
-	z: Float64Array;
-	v: Uint16Array;
-	grid: Float64Array;
-	gridInner: Float64Array;
-	gridOuter: Float64Array;
-
-	// working pixels
-	resultPixels: Float32Array;
-	readPixels: Float32Array;
-
-	readFbo: WebGLFramebuffer;
-
-	distanceProp: FloatProperty;
-
-	width: number;
-	height: number;
-
-	converter: TextureDataConverter;
-
-	public init() {
-		this.title = "Bevel";
-
-		this.addInput("image");
-
-		this.distanceProp = this.addFloatProperty(
-			"distance",
-			"Distance",
-			50.0,
-			0.0,
-			100.0,
-			0.01
-		);
-
-		this.initArrays();
-
-		// create framebuffer for reading pixels from input texture
-		this.readFbo = this.gl.createFramebuffer();
-		this.converter = new TextureDataConverter(
-			this.gl as WebGL2RenderingContext
-		);
-	}
-
-	private initArrays() {
-		const width = this.designer.width;
-		const height = this.designer.height;
-		this.width = width;
-		this.height = height;
-
-		let size = Math.max(width, height);
-
-		// make it span 3 textures wide to get wrapping
-		this.f = new Float64Array(size * 3);
-		this.z = new Float64Array(size * 3 + 1);
-		this.v = new Uint16Array(size * 3);
-
-		// convert image to float64 array
-		let gridSize = width * height;
-		this.grid = new Float64Array(gridSize);
-		this.gridOuter = new Float64Array(gridSize);
-		this.gridInner = new Float64Array(gridSize);
-		this.resultPixels = new Float32Array(width * height * 4);
-		this.readPixels = new Float32Array(width * height * 4);
-	}
-
-	public render(context: NodeRenderContext) {
-		const inputs = context.inputs;
-
-		if (inputs.length == 0) return;
-
-		let inputTexture = inputs[0].node.tex;
-
-		if (
-			this.designer.width != this.width ||
-			this.designer.height != this.height
-		) {
-			// this.width = this.designer.width;
-			// this.height = this.designer.height;
-
-			this.initArrays();
-		}
-
-		const width = this.designer.width;
-		const height = this.designer.height;
-		const gridOuter = this.gridOuter;
-		const gridInner = this.gridInner;
-		const grid = this.grid;
-
-		let gridSize = width * height;
-		let gl = context.gl as WebGL2RenderingContext;
-
-		// gl.bindFramebuffer(gl.FRAMEBUFFER, this.readFbo);
-		// gl.framebufferTexture2D(
-		// 	gl.FRAMEBUFFER,
-		// 	gl.COLOR_ATTACHMENT0,
-		// 	gl.TEXTURE_2D,
-		// 	inputTexture,
-		// 	0
-		// );
-		// if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
-		// 	gl.readPixels(
-		// 		0,
-		// 		0,
-		// 		width,
-		// 		height,
-		// 		gl.RGBA,
-		// 		gl.HALF_FLOAT,
-		// 		this.readPixels
-		// 	);
-		// } else {
-		// 	alert("Bevel: unable to read from FBO");
-		// }
-		// gl.bindFramebuffer(gl.FRAMEBUFFER, null);
-
-		this.readPixels = new Float32Array(
-			this.converter.getData(
-				inputTexture,
-				width,
-				height,
-				TextureDataType.Float32
-			)
-		);
-
-		// max value from each color component
-		const VALUE_MAX = 15360.0;
-		let pixels = this.readPixels;
-
-		// copy data over from canvas data to grid
-		for (let i = 0; i < gridSize; i++) {
-			// let col = 0;
-			// col += VALUE_MAX - pixels[i * 4 + 0];
-			// col += VALUE_MAX - pixels[i * 4 + 1];
-			// col += VALUE_MAX - pixels[i * 4 + 2];
-			// let a = (col * 0.3333) / VALUE_MAX;
-
-			// just use the red component
-			let a = pixels[i * 4 + 0];
-
-			//let a = 1.0 - (col * 0.3333) / 255; // invert
-			this.gridOuter[i] =
-				a === 1 ? 0 : a === 0 ? INF : Math.pow(Math.max(0, 0.5 - a), 2);
-			this.gridInner[i] =
-				a === 1 ? INF : a === 0 ? 0 : Math.pow(Math.max(0, a - 0.5), 2);
-		}
-
-		edt(this.gridOuter, width, height, this.f, this.v, this.z);
-		edt(this.gridInner, width, height, this.f, this.v, this.z);
-
-		let min = 1.0;
-		let max = 0;
-		let radius = this.distanceProp.getValue();
-		let offset = 0.25;
-
-		for (let i = 0; i < gridSize; i++) {
-			// let col = grid[i];
-			let d = Math.sqrt(gridOuter[i]) - Math.sqrt(gridInner[i]);
-			//var col = 255 - 255 * (d / 50 + 0.25);
-			var col = VALUE_MAX - VALUE_MAX * (d / radius + offset);
-			// clamp
-			col = Math.max(0, Math.min(VALUE_MAX, col));
-
-			min = Math.min(min, col);
-			max = Math.max(max, col);
-			grid[i] = col;
-		}
-
-		let range = max - min;
-		let scale = 1.0 / range;
-		// console.log(min, max, range, scale);
-
-		let resultPixels = this.resultPixels;
-		for (let i = 0; i < gridSize; i++) {
-			//let col = (grid[i] - min) * scale;
-			let col = 1.0 - (grid[i] - min) * scale; // de-invert
-
-			resultPixels[i * 4 + 0] = col;
-			resultPixels[i * 4 + 1] = col;
-			resultPixels[i * 4 + 2] = col;
-			resultPixels[i * 4 + 3] = 1.0;
-		}
-
-		gl.bindTexture(gl.TEXTURE_2D, this.tex);
-
-		const level = 0;
-		const internalFormat = gl.RGBA16F;
-		const border = 0;
-		const format = gl.RGBA;
-		const type = gl.FLOAT;
-		const data = resultPixels;
-		gl.texImage2D(
-			gl.TEXTURE_2D,
-			level,
-			internalFormat,
-			this.designer.width,
-			this.designer.height,
-			border,
-			format,
-			type,
-			data
-		);
-
-		// set the filtering so we don't need mips
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
-
-		gl.bindTexture(gl.TEXTURE_2D, null);
-	}
-}
-
-// todo: find better algorithm
-// https://github.com/parmanoir/Meijster-distance
-// https://github.com/scijs/distance-transform
-
-// https://github.com/mapbox/tiny-sdf/blob/master/index.js#L60
-// https://observablehq.com/@mourner/fast-distance-transform
-
-var INF = 1e20;
-
-// 2D Euclidean squared distance transform by Felzenszwalb & Huttenlocher https://cs.brown.edu/~pff/papers/dt-final.pdf
-function edt(
-	data: Float64Array,
-	width: number,
-	height: number,
-	f: Float64Array,
-	v: Uint16Array,
-	z: Float64Array
-) {
-	for (let x = 0; x < width; x++) edt1d(data, x, width, height, f, v, z);
-	for (let y = 0; y < height; y++) edt1d(data, y * width, 1, width, f, v, z);
-}
-
-// 1D squared distance transform
-function edt1d(
-	grid: Float64Array,
-	offset: number,
-	stride: number,
-	length: number,
-	f: Float64Array,
-	v: Uint16Array,
-	z: Float64Array
-) {
-	let q, k, s, r;
-	v[0] = 0;
-	z[0] = -INF;
-	z[1] = INF;
-
-	// load line in array for convenient access
-	// do it three times
-	for (q = 0; q < length; q++) f[q] = grid[offset + q * stride];
-	for (q = 0; q < length; q++) f[q + length] = grid[offset + q * stride];
-	for (q = 0; q < length; q++)
-		f[q + length + length] = grid[offset + q * stride];
-
-	for (q = 1, k = 0, s = 0; q < length * 3; q++) {
-		do {
-			r = v[k];
-			s = (f[q] - f[r] + q * q - r * r) / (q - r) / 2;
-			// todo: wrap k in z[k] and make --k > -length
-		} while (s <= z[k] && --k > -1);
-
-		k++;
-		v[k] = q;
-		z[k] = s;
-		z[k + 1] = INF;
-	}
-
-	// only cope over mid section
-	// |----|----|----|
-	//         ^
-	for (q = length, k = 0; q < length + length; q++) {
-		while (z[k + 1] < q) k++;
-		r = v[k];
-		grid[offset + (q - length) * stride] = f[r] + (q - r) * (q - r);
-	}
-}
diff --git a/src/lib/library/v2/cartesiantopolar.ts b/src/lib/library/v2/cartesiantopolar.ts
deleted file mode 100644
index cb7fcef1..00000000
--- a/src/lib/library/v2/cartesiantopolar.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
-
-// https://www.mathsisfun.com/polar-cartesian-coordinates.html
-export class CartesianToPolar extends GpuDesignerNode {
-	public init() {
-		this.title = "Cartesian To Polar";
-
-		this.addInput("image");
-
-		this.addFloatProperty("yscale", "Y Scale", 1.0, 0, 4.0, 0.01);
-		this.addIntProperty("xtile", "X Tile", 2, 0, 5, 1);
-		this.addFloatProperty("angle_offset", "Angle Offset", 0.0, 0, 360, 1.0);
-		// this.addBoolProperty("clamp", "Clamp", false);
-
-		const source = `
-        const float PI = 3.142;
-        vec4 process(vec2 uv)
-        {
-            vec2 dir = uv - vec2(0.5, 0.5);
-            float y = length(dir) * 2.0 * prop_yscale;
-
-            float x = atan(dir.y, dir.x);
-            x = (x + PI) / (PI * 2.0); // bring to range 0..1
-            x += (prop_angle_offset / 360.0);
-            x = x * float(prop_xtile);
-
-            vec4 col = texture(image, vec2(x, y));
-
-            return col;
-        }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/clamp.ts b/src/lib/library/v2/clamp.ts
deleted file mode 100644
index 66ac6b80..00000000
--- a/src/lib/library/v2/clamp.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
-
-export class Clamp extends GpuDesignerNode {
-	public init() {
-		this.title = "Clamp";
-
-		this.addInput("inputImage");
-
-		this.addFloatProperty("min", "Minimum", 0, 0, 1.0, 0.01);
-		this.addFloatProperty("max", "Maximum", 1, 0, 1.0, 0.01);
-
-		this.addBoolProperty("clamp_r", "Clamp R Chanel", true);
-		this.addBoolProperty("clamp_g", "Clamp G Chanel", true);
-		this.addBoolProperty("clamp_b", "Clamp B Chanel", true);
-		this.addBoolProperty("clamp_a", "Clamp A Chanel", false);
-
-		const source = `
-
-        vec4 process(vec2 uv)
-        {
-            // grayscale input color
-            vec4 col = texture(inputImage,uv);
-
-            if (prop_clamp_r) col.r = clamp(col.r, prop_min, prop_max);
-            if (prop_clamp_g) col.g = clamp(col.g, prop_min, prop_max);
-            if (prop_clamp_b) col.b = clamp(col.b, prop_min, prop_max);
-            if (prop_clamp_a) col.a = clamp(col.a, prop_min, prop_max);
-            
-            return col;
-        }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/directionalwarpv2.ts b/src/lib/library/v2/directionalwarpv2.ts
deleted file mode 100644
index c41a68ce..00000000
--- a/src/lib/library/v2/directionalwarpv2.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class DirectionalWarpNodeV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Directional Warp";
-
-		this.addInput("inputImage");
-		this.addInput("height");
-
-		this.addFloatProperty("intensity", "Intensity", 0.1, -0.5, 0.5, 0.01);
-		this.addFloatProperty("angle", "Angle", 0, 0, 360, 1);
-
-		// calculates normal, then warps uv by it
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec2 step = vec2(1.0,1.0)/_textureSize;
-
-            vec2 dir = normalize(vec2(cos(radians(prop_angle)), sin(radians(prop_angle))));
-
-            // center point
-            float dist = abs(texture(height, uv).r) - 0.5;
-            
-            vec4 color = texture(inputImage, uv + dir * prop_intensity * dist);
-
-            return color;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/floodfill.ts b/src/lib/library/v2/floodfill.ts
deleted file mode 100644
index a6de3485..00000000
--- a/src/lib/library/v2/floodfill.ts
+++ /dev/null
@@ -1,395 +0,0 @@
-import { NodeRenderContext } from "@/lib/designer";
-import { FloatProperty } from "@/lib/designer/properties";
-import { DesignerNode } from "../../designer/designernode";
-
-const VALUE_MAX = 15360.0;
-const ONE_OVER_VALUE_MAX = 1.0 / VALUE_MAX;
-
-// https://xjavascript.com/view/639466/read-pixels-in-webgltexture-rendering-webgl-to-texture
-// NOTE: THIS CREATES A HALF FLOAT TEXTURE, NOT UNSIGNED BYTE
-// more accuracy is needed for the output
-export class FloodFill extends DesignerNode {
-	// working pixels
-	pixels: Uint16Array;
-	readFbo: WebGLFramebuffer;
-	gen: FloodFillGenerator;
-
-	// stores the size to detect resolution change
-	width: number;
-	height: number;
-
-	public init() {
-		this.title = "Flood Fill";
-
-		this.addInput("image");
-
-		const width = this.designer.width;
-		const height = this.designer.height;
-		this.width = width;
-		this.height = height;
-
-		this.pixels = new Uint16Array(width * height * 4);
-
-		// create framebuffer for reading pixels from input texture
-		this.readFbo = this.gl.createFramebuffer();
-
-		this.gen = new FloodFillGenerator();
-		this.gen.init(width, height);
-	}
-
-	public render(context: NodeRenderContext) {
-		const inputs = context.inputs;
-
-		if (inputs.length == 0) return;
-
-		let inputTexture = inputs[0].node.tex;
-
-		if (
-			this.designer.width != this.width ||
-			this.designer.height != this.height
-		) {
-			this.width = this.designer.width;
-			this.height = this.designer.height;
-
-			this.pixels = new Uint16Array(this.width * this.height * 4);
-
-			this.gen = new FloodFillGenerator();
-			this.gen.init(this.width, this.height);
-		}
-
-		const width = this.designer.width;
-		const height = this.designer.height;
-
-		let gridSize = width * height;
-		let gl = context.gl as WebGL2RenderingContext;
-		var pixels = this.pixels;
-
-		gl.bindFramebuffer(gl.FRAMEBUFFER, this.readFbo);
-		gl.framebufferTexture2D(
-			gl.FRAMEBUFFER,
-			gl.COLOR_ATTACHMENT0,
-			gl.TEXTURE_2D,
-			inputTexture,
-			0
-		);
-		if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
-			gl.readPixels(0, 0, width, height, gl.RGBA, gl.HALF_FLOAT, pixels);
-		} else {
-			alert("Bevel: unable to read from FBO");
-		}
-		gl.bindFramebuffer(gl.FRAMEBUFFER, null);
-
-		this.gen.process(pixels);
-
-		gl.bindTexture(gl.TEXTURE_2D, this.tex);
-
-		// https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glTexImage2D.xhtml
-		const level = 0;
-		const internalFormat = gl.RGBA16F;
-		const border = 0;
-		const format = gl.RGBA;
-		const type = gl.FLOAT;
-		// const data = pixels;
-		gl.texImage2D(
-			gl.TEXTURE_2D,
-			level,
-			internalFormat,
-			this.designer.width,
-			this.designer.height,
-			border,
-			format,
-			type,
-			this.gen.results
-		);
-
-		// set the filtering so we don't need mips
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
-
-		gl.bindTexture(gl.TEXTURE_2D, null);
-
-		// console.log(this.gen.results);
-	}
-}
-
-class Vector {
-	x: number = 0;
-	y: number = 0;
-
-	constructor(x: number, y: number) {
-		this.x = x;
-		this.y = y;
-	}
-}
-
-class FloodFillPixel {
-	localX: number = 0;
-	localY: number = 0;
-
-	globalX: number = 0;
-	globalY: number = 0;
-
-	constructor(
-		localX: number,
-		localY: number,
-		globalX: number,
-		globalY: number
-	) {
-		this.localX = localX;
-		this.localY = localY;
-
-		this.globalX = globalX;
-		this.globalY = globalY;
-	}
-}
-
-class Box {
-	left: number = 0;
-	top: number = 0;
-	right: number = 0;
-	bottom: number = 0;
-
-	// coordinates of captured pixels
-	pixels: FloodFillPixel[] = [];
-
-	public expand(x: number, y: number) {
-		//console.log(this);
-		this.left = Math.min(this.left, x);
-		this.top = Math.min(this.top, y);
-
-		this.right = Math.max(this.right, x);
-		this.bottom = Math.max(this.bottom, y);
-
-		//console.log(x + " , " + y);
-	}
-
-	public negativeInfinity() {
-		this.left = Number.POSITIVE_INFINITY;
-		this.top = Number.POSITIVE_INFINITY;
-
-		this.right = Number.NEGATIVE_INFINITY;
-		this.bottom = Number.NEGATIVE_INFINITY;
-	}
-
-	get width() {
-		return this.right - this.left;
-	}
-
-	get height() {
-		return this.bottom - this.top;
-	}
-
-	get x() {
-		return this.left;
-	}
-
-	get y() {
-		return this.top;
-	}
-}
-
-class FloodFillGenerator {
-	rects: Box[] = [];
-
-	visited: Array<boolean> = [];
-	width: number;
-	height: number;
-	results: Float32Array;
-
-	constructor() {}
-
-	init(width: number, height: number) {
-		this.width = width;
-		this.height = height;
-
-		let visited = this.visited;
-		visited.length = width * height;
-
-		this.results = new Float32Array(width * height * 4);
-	}
-
-	process(pixels: Uint16Array) {
-		let threshold = 0.1;
-
-		// allocate image of same size to track visited pixels
-		let visited = this.visited;
-		for (let i = 0; i < visited.length; i++) visited[i] = false;
-
-		let width = this.width;
-		let height = this.height;
-
-		this.rects = [];
-		for (let y = 0; y < height; y++) {
-			for (let x = 0; x < width; x++) {
-				if (visited[y * width + x] == true) continue;
-
-				this.captureIsland(x, y, pixels, width, height, visited);
-			}
-		}
-
-		this.renderOutput(this.results);
-	}
-
-	captureIsland(
-		x: number,
-		y: number,
-		pixels: Uint16Array,
-		width: number,
-		height: number,
-		visited: Array<boolean>
-	) {
-		let rect: Box = new Box();
-		rect.negativeInfinity();
-
-		// this queue contains coords in a global space
-		// i.e. values can be negative or larger than the
-		// texture size
-		let queue: Vector[] = [new Vector(x, y)];
-		while (queue.length > 0) {
-			let globalPixel = queue.shift();
-			// should never happen
-			if (!globalPixel) continue;
-
-			let pixel = this.mapPixelToLocal(globalPixel, width, height);
-
-			// skip if already visited
-			if (visited[pixel.y * width + pixel.x] == true) continue;
-
-			visited[pixel.y * width + pixel.x] = true;
-
-			// 0.1 or less denotes a dark pixel
-			// skip this
-			let intensity = this.getIntensity(
-				pixel.x,
-				pixel.y,
-				pixels,
-				width,
-				height
-			);
-			if (intensity < 0.1) {
-				continue;
-			}
-
-			// ok it's a white enough pixel, add it's neighbors to the queue
-			// and expand the rect
-			rect.expand(globalPixel.x, globalPixel.y);
-			rect.pixels.push(
-				new FloodFillPixel(pixel.x, pixel.y, globalPixel.x, globalPixel.y)
-			);
-
-			queue.push(new Vector(globalPixel.x + 1, globalPixel.y + 0));
-			queue.push(new Vector(globalPixel.x - 1, globalPixel.y + 0));
-			queue.push(new Vector(globalPixel.x + 0, globalPixel.y + 1));
-			queue.push(new Vector(globalPixel.x + 0, globalPixel.y - 1));
-		}
-
-		if (rect.width <= 0 || rect.height <= 0) return;
-
-		this.rects.push(rect);
-	}
-
-	mapPixelToLocal(globalPixel: Vector, width: number, height: number): Vector {
-		return new Vector(
-			wrapAround(globalPixel.x, width),
-			wrapAround(globalPixel.y, height)
-		);
-	}
-
-	getIntensity(
-		x: number,
-		y: number,
-		data: Uint16Array,
-		width: number,
-		height: number
-	): number {
-		let col = 0;
-		col += data[4 * (width * y + x) + 0];
-		col += data[4 * (width * y + x) + 1];
-		col += data[4 * (width * y + x) + 2];
-
-		//						average    map to 0.0 - 1.0
-		let intensity = col * (1.0 / 3.0) * ONE_OVER_VALUE_MAX;
-
-		return intensity;
-	}
-
-	renderRects(canvas: HTMLCanvasElement) {
-		let ctx = canvas.getContext("2d");
-		if (!ctx) return;
-
-		ctx.strokeStyle = "red";
-		ctx.lineWidth = 1;
-
-		for (let rect of this.rects) {
-			ctx.strokeRect(rect.x, rect.y, rect.width, rect.height);
-		}
-	}
-
-	renderOutput(results: Float32Array) {
-		let width = this.width;
-		let height = this.height;
-
-		// clear results first
-		for (let i = 0; i < results.length; i++) results[i] = 0;
-
-		for (let rect of this.rects) {
-			let sx = rect.width * (1.0 / width); // * 255;
-			let sy = rect.height * (1.0 / height); // * 255;
-
-			for (let pixel of rect.pixels) {
-				let u = (pixel.globalX - rect.left) / rect.width; // * 255;
-				let v = (pixel.globalY - rect.top) / rect.height; // * 255;
-
-				setColorAtPixel(
-					results,
-					width,
-					height,
-					pixel.localX,
-					pixel.localY,
-					u,
-					v,
-					sx,
-					sy
-				);
-				//setColorAtPixel(data, pixel.x, pixel.y, 255, 0, 0, 255);
-			}
-		}
-	}
-}
-
-// https://stackoverflow.com/questions/14325750/using-mod-to-wrap-around
-// upperBound is never touchec
-function wrapAround(value: number, upperBound: number) {
-	return (value + upperBound - 1) % upperBound;
-}
-
-// https://codepen.io/Geeyoam/pen/vLGZzG
-function getColorAtPixel(imageData: ImageData, x: number, y: number) {
-	const { width, data } = imageData;
-
-	return {
-		r: data[4 * (width * y + x) + 0],
-		g: data[4 * (width * y + x) + 1],
-		b: data[4 * (width * y + x) + 2],
-		a: data[4 * (width * y + x) + 3]
-	};
-}
-
-function setColorAtPixel(
-	data: Float32Array,
-	width: number,
-	height: number,
-	x: number,
-	y: number,
-	r: number,
-	g: number,
-	b: number,
-	a: number
-) {
-	data[4 * (width * y + x) + 0] = r;
-	data[4 * (width * y + x) + 1] = g;
-	data[4 * (width * y + x) + 2] = b;
-	data[4 * (width * y + x) + 3] = a;
-}
diff --git a/src/lib/library/v2/gradientdynamic.ts b/src/lib/library/v2/gradientdynamic.ts
deleted file mode 100644
index e28a51b5..00000000
--- a/src/lib/library/v2/gradientdynamic.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class GradientDynamic extends GpuDesignerNode {
-	public init() {
-		this.title = "Gradient Dynamic";
-
-		this.addInput("image");
-		this.addInput("gradient");
-
-		this.addFloatProperty("position", "Position", 0, 0, 1, 0.01);
-
-		this.addEnumProperty("orientation", "Gradient Direction", [
-			"Vertical",
-			"Horizontal"
-		]);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            float t = 0.0;
-    
-            float intensity = texture(image, uv).r;
-
-            vec4 col = vec4(0);
-            if (prop_orientation == 0)
-                col = texture(gradient, vec2(prop_position, intensity));
-            else
-                col = texture(gradient, vec2(intensity, prop_position));
-            
-            return col;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/grayscale.ts b/src/lib/library/v2/grayscale.ts
deleted file mode 100644
index ff269822..00000000
--- a/src/lib/library/v2/grayscale.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
-
-export class Grayscale extends GpuDesignerNode {
-	public init() {
-		this.title = "Grayscale";
-
-		this.addInput("image");
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            // grayscale input color
-            vec4 col = texture(image, uv);
-			
-			col.rgb = vec3((col.r + col.g + col.b) * 0.3333333);
-
-            return col;
-        }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/histogramshift.ts b/src/lib/library/v2/histogramshift.ts
deleted file mode 100644
index 83f4101a..00000000
--- a/src/lib/library/v2/histogramshift.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class HistogramShift extends GpuDesignerNode {
-	public init() {
-		this.title = "Histogram Shift";
-
-		this.addInput("image");
-
-		this.addFloatProperty("position", "Position", 0.0, 0.0, 1.0, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 a =  texture(image, uv);
-
-            // shows artifacts for pixels at 1 when position is at 0
-            a.rgb = mod(a.rgb + vec3(prop_position), vec3(1.0));
-
-            return a;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/imagenode.ts b/src/lib/library/v2/imagenode.ts
deleted file mode 100644
index 47506e4a..00000000
--- a/src/lib/library/v2/imagenode.ts
+++ /dev/null
@@ -1,79 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Image } from "@/lib/designer/image";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { NodeRenderContext } from "@/lib/designer";
-import { ImageProperty } from "@/lib/designer/properties";
-
-export class ImageNode extends DesignerNode {
-	canvas: HTMLCanvasElement;
-	imageProp: ImageProperty;
-	public init() {
-		this.title = "Image";
-
-		this.canvas = document.createElement("canvas") as HTMLCanvasElement;
-		this.canvas.width = this.designer.width;
-		this.canvas.height = this.designer.height;
-
-		let ctx = this.canvas.getContext("2d");
-		ctx.fillStyle = "rgb(0,255,0)";
-		ctx.fillRect(0, 0, this.canvas.width, this.canvas.height);
-
-		this.imageProp = this.addImageProperty("image", "Image", Image.empty());
-	}
-
-	public render(context: NodeRenderContext) {
-		let gl = context.gl as WebGL2RenderingContext;
-
-		this.canvas.width = this.designer.width;
-		this.canvas.height = this.designer.height;
-		console.log(this.designer.width);
-		console.log(this.designer.height);
-
-		let ctx = this.canvas.getContext("2d");
-
-		// ctx.fillStyle = "rgb(0,255,0)";
-		// ctx.fillRect(0, 0, this.canvas.width, this.canvas.height);
-
-		ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
-		if (this.imageProp.value && !this.imageProp.value.isEmpty) {
-			ctx.drawImage(
-				this.imageProp.value.canvas,
-				0,
-				0,
-				this.canvas.width,
-				this.canvas.height
-			);
-			console.log("drawing image");
-		}
-
-		gl.bindTexture(gl.TEXTURE_2D, this.tex);
-
-		//todo: this throws an error, manually convert to float texture
-		const level = 0;
-		const internalFormat = gl.RGBA16F;
-		const border = 0;
-		const format = gl.RGBA;
-		const type = gl.UNSIGNED_BYTE;
-		const data = this.canvas;
-		gl.texImage2D(
-			gl.TEXTURE_2D,
-			level,
-			internalFormat,
-			this.designer.width,
-			this.designer.height,
-			border,
-			format,
-			type,
-			data
-		);
-
-		// set the filtering so we don't need mips
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
-		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
-
-		gl.bindTexture(gl.TEXTURE_2D, null);
-	}
-}
diff --git a/src/lib/library/v2/invertnormal.ts b/src/lib/library/v2/invertnormal.ts
deleted file mode 100644
index f9bae0dc..00000000
--- a/src/lib/library/v2/invertnormal.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
-
-export class InvertNormal extends GpuDesignerNode {
-	public init() {
-		this.title = "Invert Normal";
-
-		this.addInput("inputImage");
-
-		this.addBoolProperty("invertRed", "Invert Red", false);
-		this.addBoolProperty("invertGreen", "Invert Green", true);
-		this.addBoolProperty("invertBlue", "Invert Blue", false);
-		this.addBoolProperty("invertAlpha", "Invert Alpha", false);
-
-		const source = `
-
-        vec4 process(vec2 uv)
-        {
-            // grayscale input color
-            vec4 result = texture(inputImage,uv);
-
-			if(prop_invertRed) result.r = 1.0 - result.r;
-			if(prop_invertGreen) result.g = 1.0 - result.g;
-			if(prop_invertBlue) result.b = 1.0 - result.b;
-			if(prop_invertAlpha) result.a = 1.0 - result.a;
-            
-            return result;
-        }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/normalmapv2.ts b/src/lib/library/v2/normalmapv2.ts
deleted file mode 100644
index 2f32a7b5..00000000
--- a/src/lib/library/v2/normalmapv2.ts
+++ /dev/null
@@ -1,108 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-// http://www.smart-page.net/smartnormal/js/SmartNormalMapFilter.js
-export class NormalMapV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Normal Map";
-		//this.exportName = "result";
-		this.addInput("height");
-
-		// this.addFloatProperty("strength", "Strength", 0.02, -0.02, 0.02, 0.00001);
-		this.addFloatProperty("strength", "Strength", 1, -2.0, 2.0, 0.05);
-		this.addIntProperty("range", "Range", 1, 1, 20, 1);
-		this.addBoolProperty("res_ind", "Resolution Independent", false);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec2 step = (vec2(1.0, 1.0) / _textureSize) * float(prop_range);
-            if (prop_res_ind)
-                step = (vec2(1.0, 1.0) / 1024.0) * float(prop_range);
-            float strength = prop_strength * 0.1;
-
-            // center point
-            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r) * strength / 2.0;
-
-            // sample horizontally
-            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r) * strength / 2.0;
-            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r) * strength / 2.0;
-
-            // sample vertically
-            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r) * strength / 2.0;
-            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r) * strength / 2.0;
-
-            // find diff horizontally and average
-            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
-
-            // find diff vertically and average
-            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
-
-            vec3 dvx = vec3(step.x, 0.0       , d1-d0);
-            vec3 dvy = vec3(0.0       , step.y, d3-d0);
-            vec3 normal = normalize(cross(dvx, dvy));
-            vec3 final = normal.xyz * 0.5 + 0.5;
-
-            return vec4(final, 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class BetterWarpNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Better Warp Node";
-		//this.exportName = "result";
-		this.addInput("image");
-		this.addInput("height");
-
-		this.addFloatProperty("strength", "Strength", 0.001, -0.02, 0.02, 0.00001);
-		this.addFloatProperty("spread", "Spread", 0.1, 0, 1, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            //vec2 size = textureSize(height);
-            //vec2 size = vec2(1024,1024); // quick hack for now
-            vec2 step = vec2(1.0,1.0)/_textureSize;
-
-            // center point
-            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r) * prop_strength / 2.0;
-
-            // sample horizontally
-            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r) * prop_strength / 2.0;
-            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r) * prop_strength / 2.0;
-
-            // sample vertically
-            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r) * prop_strength / 2.0;
-            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r) * prop_strength / 2.0;
-
-            // find diff horizontally and average
-            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
-
-            // find diff vertically and average
-            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
-
-            // calculate normal
-            //vec3 normal = normalize(vec3(dx * prop_strength, dy * prop_strength, 1.0));
-            //vec3 normal = normalize(vec3(dx, dy, 1.0));
-            //vec3 final = normal.xyz * 0.5 + 0.5; // bring to 0.0 - 1.0 range
-
-            vec3 dvx = vec3(step.x, 0.0       , d1-d0);
-            vec3 dvy = vec3(0.0       , step.y, d3-d0);
-            vec3 normal = normalize(cross(dvx, dvy));
-            //vec3 final = normal.xyz * 0.5 + 0.5;
-
-            float intensity = (1.0 - texture(height, uv).r) * prop_spread;
-            vec3 colorOut = texture(image, uv + vec2(-normal.x * intensity, -normal.y * intensity) ).rgb;
-
-            return vec4(colorOut, 1.0);
-            //return vec4(vec3(normal.y), 1.0);
-            //return vec4(vec3(dot(normal, vec3(0,0,1))), 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/pow.ts b/src/lib/library/v2/pow.ts
deleted file mode 100644
index c262792b..00000000
--- a/src/lib/library/v2/pow.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class Pow extends GpuDesignerNode {
-	public init() {
-		this.title = "Pow";
-
-		this.addInput("image");
-
-		this.addFloatProperty("exponent", "Exponent", 1.0, 0.0, 10.0, 0.01);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 a =  texture(image, uv);
-            a.rgb = pow(a.rgb, vec3(prop_exponent));
-
-            return a;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/quantize.ts b/src/lib/library/v2/quantize.ts
deleted file mode 100644
index dfc1ae88..00000000
--- a/src/lib/library/v2/quantize.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class Quantize extends GpuDesignerNode {
-	public init() {
-		this.title = "Quantize";
-
-		this.addInput("image");
-
-		this.addIntProperty("steps", "Steps", 12, 2, 20, 1);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            vec4 a =  texture(image, uv);
-            a.rgb = floor(a.rgb * vec3(float(prop_steps))) / vec3(float(prop_steps));
-
-            return a;
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/rgbamerge.ts b/src/lib/library/v2/rgbamerge.ts
deleted file mode 100644
index 9b6ffca9..00000000
--- a/src/lib/library/v2/rgbamerge.ts
+++ /dev/null
@@ -1,93 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
-
-export class RgbaMerge extends GpuDesignerNode {
-	public init() {
-		this.title = "RGBA Merge";
-
-		this.addInput("redSource");
-		this.addInput("greenSource");
-		this.addInput("blueSource");
-		this.addInput("alphaSource");
-
-		// Red
-		let prop = this.addEnumProperty("redSource", "Red Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(0);
-
-		// Green
-		prop = this.addEnumProperty("greenSource", "Green Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(1);
-
-		// Blue
-		prop = this.addEnumProperty("blueSource", "Blue Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(2);
-
-		// Alpha
-		prop = this.addEnumProperty("alphaSource", "Alpha Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(3);
-
-		const source = `
-
-		float getChannel(vec4 inputData, int mode)
-		{
-			if (mode == 0) return inputData.r;
-			if (mode == 1) return inputData.g;
-			if (mode == 2) return inputData.b;
-			if (mode == 3) return inputData.a;
-			if (mode == 4) {
-				return (inputData.r + inputData.g + inputData.b) * 0.3333333;
-			}
-
-			return 0.0;
-		}
-
-        vec4 process(vec2 uv)
-        {
-            // grayscale input color
-            vec4 r = texture(redSource,uv);
-            vec4 g = texture(greenSource,uv);
-            vec4 b = texture(blueSource,uv);
-            vec4 a = texture(alphaSource,uv);
-
-			vec4 result = vec4(0, 0, 0, 1);
-			if (redSource_connected)
-				result.r = getChannel(r, prop_redSource);
-			if (greenSource_connected)
-				result.g = getChannel(g, prop_greenSource);
-			if (blueSource_connected)
-				result.b = getChannel(b, prop_blueSource);
-			if (alphaSource_connected)
-				result.a = getChannel(a, prop_alphaSource);
-            
-            return result;
-        }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/rgbashuffle.ts b/src/lib/library/v2/rgbashuffle.ts
deleted file mode 100644
index ec60f44b..00000000
--- a/src/lib/library/v2/rgbashuffle.ts
+++ /dev/null
@@ -1,83 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
-
-export class RgbaShuffle extends GpuDesignerNode {
-	public init() {
-		this.title = "RGBA Shuffle";
-
-		this.addInput("inputImage");
-
-		// Red
-		let prop = this.addEnumProperty("redSource", "Red Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(0);
-
-		// Green
-		prop = this.addEnumProperty("greenSource", "Green Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(1);
-
-		// Blue
-		prop = this.addEnumProperty("blueSource", "Blue Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(2);
-
-		// Alpha
-		prop = this.addEnumProperty("alphaSource", "Alpha Source", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
-		prop.setValue(3);
-
-		const source = `
-
-		float getChannel(vec4 inputData, int mode)
-		{
-			if (mode == 0) return inputData.r;
-			if (mode == 1) return inputData.g;
-			if (mode == 2) return inputData.b;
-			if (mode == 3) return inputData.a;
-			if (mode == 4) {
-				return (inputData.r + inputData.g + inputData.b) * 0.3333333;
-			}
-
-			return 0.0;
-		}
-
-        vec4 process(vec2 uv)
-        {
-            // grayscale input color
-            vec4 col = texture(inputImage,uv);
-
-			vec4 result = vec4(0);
-			result.r = getChannel(col, prop_redSource);
-			result.g = getChannel(col, prop_greenSource);
-			result.b = getChannel(col, prop_blueSource);
-			result.a = getChannel(col, prop_alphaSource);
-            
-            return result;
-        }
-          `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v2/stripes.ts b/src/lib/library/v2/stripes.ts
deleted file mode 100644
index 83f14ce1..00000000
--- a/src/lib/library/v2/stripes.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class StripesNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Stripes";
-
-		this.addIntProperty("stripes", "Stripes", 10, 0, 30, 1);
-		this.addIntProperty("shift", "Shift", 0, 0, 30, 1);
-		this.addFloatProperty("width", "Width", 0.5, 0.0, 1.0, 0.01);
-
-		// calculates normal, then warps uv by it
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            float fx = uv.x * 3.142 * 2.0 * float(prop_stripes);
-            float fy = uv.y * 3.142 * 2.0 * float(prop_shift);
-            float wave = sin(fx + fy);
-
-            // bring wave to range 0...1
-            wave = wave * 0.5 + 0.5;
-            wave = step(prop_width, wave);
-
-            return vec4(vec3(wave), 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/library/v3/crop.ts b/src/lib/library/v3/crop.ts
deleted file mode 100644
index 271419d6..00000000
--- a/src/lib/library/v3/crop.ts
+++ /dev/null
@@ -1,47 +0,0 @@
-import { Color } from "@/lib/designer/color";
-import { GpuDesignerNode } from "@/lib/designer/gpudesignernode";
-
-export class Crop extends GpuDesignerNode {
-	public init() {
-		this.title = "Crop";
-
-		this.addInput("image");
-
-		this.addFloatProperty("min_x", "X Start", 0.0, 0, 1, 0.01);
-		this.addFloatProperty("max_x", "X End", 1.0, 0, 1, 0.01);
-		this.addFloatProperty("min_y", "Y Start", 0.0, 0, 1, 0.01);
-		this.addFloatProperty("max_y", "Y End", 1.0, 0, 1, 0.01);
-
-		this.addColorProperty("bg", "Background Color", new Color());
-
-		this.addBoolProperty("clamp", "Clamp", false);
-		this.addBoolProperty("clamp_x", "Clamp X", false);
-		this.addBoolProperty("clamp_y", "Clamp Y", false);
-
-		const source = `
-		
-		bool is_fg(float val, float min_val, float max_val, bool clamp)
-		{
-			if (min_val <= max_val) {
-				return min_val <= val && val <= max_val;
-			} else {
-				if (clamp) return false;
-
-				return val <= max_val || min_val <= val;
-			}
-		}
-
-		vec4 process(vec2 uv)
-		{
-			if (is_fg(uv.x, prop_min_x, prop_max_x, prop_clamp || prop_clamp_x) && is_fg(uv.y, prop_min_y, prop_max_y, prop_clamp || prop_clamp_y))
-			{
-				return texture(image, uv);
-			} else {
-				return vec4(prop_bg.rgb, 1.0);
-			}
-		}
-		`;
-
-		this.buildShader(source);
-	}
-}
diff --git a/src/lib/project.ts b/src/lib/project.ts
deleted file mode 100644
index 6b79f27e..00000000
--- a/src/lib/project.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-import fs from "fs";
-
-interface ExportSettings {
-	destination: string;
-	pattern: string;
-}
-
-export class Project {
-	name: string = null;
-	path: string = null;
-
-	data: object = null;
-
-	getExportSettings() {}
-}
-
-export class ProjectManager {
-	static load(path: string): Project {
-		const project = new Project();
-
-		project.path = path;
-
-		const fileName = path.replace(/^.*[\\/]/, "");
-		project.name = fileName.substr(0, fileName.lastIndexOf(".")) || fileName;
-
-		// project.name = path.replace(/^.*[\\/]/, "");
-		project.data = JSON.parse(fs.readFileSync(path).toString());
-		return project;
-	}
-
-	static save(path: string, project: Project) {
-		// console.log(project.data);
-		// console.log(JSON.stringify(project.data));
-		fs.writeFileSync(path, JSON.stringify(project.data));
-	}
-}
diff --git a/src/lib/scene.ts b/src/lib/scene.ts
deleted file mode 100644
index f79ff6bd..00000000
--- a/src/lib/scene.ts
+++ /dev/null
@@ -1,1203 +0,0 @@
-import { ImageCanvas } from "./designer/imagecanvas";
-import { Designer } from "./designer";
-import {
-	NodeGraphicsItem,
-	NodeGraphicsItemRenderState
-} from "./scene/nodegraphicsitem";
-import { ConnectionGraphicsItem } from "./scene/connectiongraphicsitem";
-import { SocketGraphicsItem, SocketType } from "./scene/socketgraphicsitem";
-import {
-	GraphicsItem,
-	MouseMoveEvent,
-	MouseDownEvent,
-	MouseUpEvent,
-	MouseOverEvent
-} from "./scene/graphicsitem";
-import { SceneView } from "./scene/view";
-import { FrameGraphicsItem } from "./scene/framegraphicsitem";
-import { CommentGraphicsItem } from "./scene/commentgraphicsitem";
-import { NavigationGraphicsItem } from "./scene/navigationgraphicsitem";
-import { SelectionGraphicsItem } from "./scene/selectiongraphicsitem";
-import { Color } from "./designer/color";
-import { ItemClipboard } from "./clipboard";
-
-enum DragMode {
-	None,
-	Selection,
-	Nodes,
-	Socket,
-	Frame,
-	Pin,
-	Comment
-}
-
-class Selection {
-	nodes: NodeGraphicsItem[];
-
-	public clear() {
-		this.nodes = [];
-	}
-}
-class Rect {
-	x: number;
-	y: number;
-	width: number;
-	height: number;
-
-	Rect(x = 0, y = 0, width = 1, height = 1) {
-		this.x = x;
-		this.y = y;
-		this.width = width;
-		this.height = height;
-	}
-}
-
-export class NodeScene {
-	canvas: HTMLCanvasElement;
-	context!: CanvasRenderingContext2D;
-	contextExtra: any;
-	hasFocus: boolean;
-
-	frames: FrameGraphicsItem[];
-	comments: CommentGraphicsItem[];
-	navigations: NavigationGraphicsItem[];
-	nodes: NodeGraphicsItem[];
-	conns: ConnectionGraphicsItem[];
-	selection: SelectionGraphicsItem;
-
-	dragMode: DragMode;
-	selectionRect: Rect;
-	draggedNode?: NodeGraphicsItem;
-	//selectedNode: NodeGraphicsItem;
-	hitSocket?: SocketGraphicsItem;
-	hitConnection?: ConnectionGraphicsItem;
-	//selectedItem: GraphicsItem;
-	selectedItems: GraphicsItem[];
-	hitItem: GraphicsItem;
-
-	// callbacks
-	onconnectioncreated?: (item: ConnectionGraphicsItem) => void;
-	onconnectiondestroyed?: (item: ConnectionGraphicsItem) => void;
-	// passes null if no node is selected
-	onnodeselected?: (item: NodeGraphicsItem) => void;
-	oncommentselected?: (item: CommentGraphicsItem) => void;
-	onframeselected?: (item: FrameGraphicsItem) => void;
-	onnavigationselected?: (item: NavigationGraphicsItem) => void;
-
-	onnodedeleted?: (item: NodeGraphicsItem) => void;
-
-	// called right before items get deleted
-	// ideal for undo/redo
-	onitemsdeleting?: (
-		frames: FrameGraphicsItem[],
-		comments: CommentGraphicsItem[],
-		navs: NavigationGraphicsItem[],
-		cons: ConnectionGraphicsItem[],
-		nodes: NodeGraphicsItem[]
-	) => void;
-
-	// called after items are deleted
-	onitemsdeleted?: (
-		frames: FrameGraphicsItem[],
-		comments: CommentGraphicsItem[],
-		navs: NavigationGraphicsItem[],
-		cons: ConnectionGraphicsItem[],
-		nodes: NodeGraphicsItem[]
-	) => void;
-
-	oncopy?: (evt: ClipboardEvent) => void;
-	oncut?: (evt: ClipboardEvent) => void;
-	onpaste?: (evt: ClipboardEvent) => void;
-
-	onlibrarymenu?: () => void;
-
-	view: SceneView;
-
-	// listeners for cleanup
-	_mouseMove: (evt: MouseEvent) => void;
-	_mouseDown: (evt: MouseEvent) => void;
-	_mouseUp: (evt: MouseEvent) => void;
-	_mouseClick: (evt: MouseEvent) => void;
-	_keyDown: (evt: KeyboardEvent) => void;
-	_contextMenu: (evt: MouseEvent) => void;
-	_copyEvent: (evt: ClipboardEvent) => void;
-	_cutEvent: (evt: ClipboardEvent) => void;
-	_pasteEvent: (evt: ClipboardEvent) => void;
-	copyElement: HTMLInputElement;
-
-	constructor(canvas: HTMLCanvasElement) {
-		this.canvas = canvas;
-		this.context = this.canvas.getContext("2d");
-		this.view = new SceneView(canvas);
-		this.hasFocus = false;
-		this.contextExtra = this.context;
-		this.frames = [];
-		this.comments = [];
-		this.nodes = [];
-		this.conns = [];
-		this.navigations = [];
-		this.dragMode = null;
-		this.selectionRect = new Rect();
-		//this.selectedItem = null;
-		this.selectedItems = [];
-		this.hitItem = null;
-
-		// add sample frames
-		// let frame = new FrameGraphicsItem(this.view);
-		// frame.setSize(500, 300);
-		// frame.scene = this;
-		// this.frames.push(frame);
-
-		// let comment = new CommentGraphicsItem(this.view);
-		// comment.scene = this;
-		// //comment.setText("Hello World");
-		// comment.setText("This\nis\na\nmultiline\nmessage");
-		// comment.setCenter(200, 500);
-		// this.comments.push(comment);
-
-		// let nav = new NavigationGraphicsItem();
-		// nav.scene = this;
-		// nav.setLabel("Test Navigation");
-		// this.navigations.push(nav);
-
-		// bind event listeners
-		const self = this;
-		this._mouseMove = function(evt: MouseEvent) {
-			self.onMouseMove(evt);
-		};
-		canvas.addEventListener("mousemove", this._mouseMove);
-
-		self._mouseDown = function(evt: MouseEvent) {
-			self.onMouseDown(evt);
-		};
-		canvas.addEventListener("mousedown", self._mouseDown);
-
-		self._mouseUp = function(evt: MouseEvent) {
-			self.onMouseUp(evt);
-
-			if (evt.target == canvas) {
-				self.hasFocus = true;
-
-				// focus copy element
-				self.copyElement.focus();
-				self.copyElement.select();
-			} else {
-				self.hasFocus = false;
-			}
-		};
-		canvas.addEventListener("mouseup", self._mouseUp);
-
-		// self._mouseClick = function(evt: MouseEvent) {
-		// 	if (evt.target == canvas) {
-		// 		self.hasFocus = true;
-		// 	} else {
-		// 		self.hasFocus = false;
-		// 	}
-		// };
-		// window.addEventListener("click", self._mouseClick);
-
-		self._keyDown = function(evt: KeyboardEvent) {
-			if (
-				evt.key == "Delete" &&
-				self.hasFocus &&
-				self.selectedItems.length != 0
-			) {
-				//self.deleteNode(self.selectedNode);
-				self.deleteItems(self.selectedItems);
-			}
-
-			if (
-				evt.key == " " &&
-				// self.hasFocus &&
-				self.view.isMouseOverCanvas()
-			) {
-				if (self.onlibrarymenu != null && self.hitItem == null) {
-					self.onlibrarymenu();
-				}
-			}
-
-			//console.log(evt.key.length);
-		};
-		window.addEventListener("keydown", self._keyDown, true);
-		// canvas.addEventListener("mousewheel", function(evt: WheelEvent) {
-		//   self.onMouseScroll(evt);
-		// });
-		self._contextMenu = function(evt: MouseEvent) {
-			evt.preventDefault();
-		};
-		canvas.addEventListener("contextmenu", self._contextMenu);
-
-		this._copyEvent = evt => {
-			if (self.hasFocus && evt.target == self.copyElement) {
-				// alert("copying selection");
-				evt.preventDefault();
-
-				self.onCopy(evt);
-			}
-		};
-		document.addEventListener("copy", this._copyEvent);
-
-		this._cutEvent = evt => {
-			if (self.hasFocus && evt.target == self.copyElement) {
-				// alert("cutting selection");
-				evt.preventDefault();
-
-				self.onCut(evt);
-				self.deleteItems(this.selectedItems);
-			}
-		};
-		document.addEventListener("cut", this._cutEvent);
-
-		this._pasteEvent = evt => {
-			if (self.hasFocus && evt.target == self.copyElement) {
-				// alert("pasting selection");
-				// console.log(evt.target);
-				// console.log(evt.clipboardData);
-				evt.preventDefault();
-				self.copyElement.value = " ";
-
-				self.onPaste(evt);
-			}
-		};
-		document.addEventListener("paste", this._pasteEvent);
-
-		this.copyElement = document.createElement("input");
-		self.copyElement.value = " ";
-		//self.copyElement.style.display = "none";
-		self.copyElement.style.opacity = "0";
-		self.copyElement.style.width = "1px";
-		self.copyElement.style.height = "1px";
-		document.body.appendChild(this.copyElement);
-		//this.copyElement.addEventListener("copy", this._copyEvent);
-		// note: console.log(this.copyElement) to see in DOM
-		// golden layout conveniently hides it
-	}
-
-	dispose() {
-		// alert("disposed!");
-		this.canvas.removeEventListener("mousemove", this._mouseMove);
-		this.canvas.removeEventListener("mousedown", this._mouseDown);
-		this.canvas.removeEventListener("mouseup", this._mouseUp);
-		window.removeEventListener("click", this._mouseClick);
-		window.removeEventListener("keydown", this._keyDown, true);
-		this.canvas.removeEventListener("contextmenu", this._contextMenu);
-		document.removeEventListener("copy", this._copyEvent);
-		document.removeEventListener("paste", this._pasteEvent);
-		// this.copyElement.removeEventListener("copy", this._copyEvent);
-		// this.copyElement.removeEventListener("paste", this._copyEvent);
-
-		this.canvas = null;
-		this.context = null;
-		this.view = null;
-		this.contextExtra = null;
-		this.frames = [];
-		this.comments = [];
-		this.nodes = [];
-		this.conns = [];
-		this.navigations = [];
-		this.selectionRect = null;
-		this.selectedItems = [];
-		this.hitItem = null;
-	}
-
-	setSelectedItems(items: GraphicsItem[], createSelection = false) {
-		this.selectedItems = items;
-
-		// create actual selection object to encapsulate items
-		if (createSelection == true) {
-			const sel: SelectionGraphicsItem = new SelectionGraphicsItem(
-				this,
-				this.view
-			);
-			sel.setHitItems(items);
-			this.selection = sel;
-		}
-	}
-
-	// no callbacks are made here
-	addNode(item: NodeGraphicsItem) {
-		this.nodes.push(item);
-
-		// needed for sockets to get scene instance
-		item.setScene(this);
-	}
-
-	addComment(item: CommentGraphicsItem) {
-		item.setScene(this);
-		this.comments.push(item);
-	}
-
-	removeComment(item: CommentGraphicsItem) {
-		//todo: remove from selection
-		const i = this.comments.indexOf(item);
-		if (i !== -1) this.comments.splice(i, 1);
-	}
-
-	addFrame(item: FrameGraphicsItem) {
-		item.setScene(this);
-		this.frames.push(item);
-	}
-
-	removeFrame(item: FrameGraphicsItem) {
-		//todo: remove from selection
-		const i = this.frames.indexOf(item);
-		if (i !== -1) this.frames.splice(i, 1);
-	}
-
-	addNavigation(nav: NavigationGraphicsItem) {
-		nav.setScene(this);
-		this.navigations.push(nav);
-	}
-
-	removeNavigation(item: NavigationGraphicsItem) {
-		//todo: remove from selection
-		const i = this.navigations.indexOf(item);
-		if (i !== -1) this.navigations.splice(i, 1);
-	}
-
-	deleteNode(item: NodeGraphicsItem) {
-		// delete connections
-		const conns = this.conns;
-		for (let i = this.conns.length - 1; i >= 0; i--) {
-			const con = this.conns[i];
-			if (
-				(con.socketA && con.socketA.node.id == item.id) ||
-				(con.socketB && con.socketB.node.id == item.id)
-			) {
-				this.removeConnection(con);
-			}
-		}
-
-		// remove node from list
-		this.nodes.splice(this.nodes.indexOf(item), 1);
-
-		// if node is selected (which it most likely is), clear it from selection
-		// this.selectedNode = null;
-
-		// emit deselection
-		if (this.onnodeselected) this.onnodeselected(null);
-
-		// emit remove event
-		if (this.onnodedeleted) this.onnodedeleted(item);
-	}
-
-	// called by delete or cut event
-	deleteItems(items: GraphicsItem[]) {
-		// 1 - put items in buckets
-		const frames: FrameGraphicsItem[] = [];
-		const comments: CommentGraphicsItem[] = [];
-		const navs: NavigationGraphicsItem[] = [];
-		const cons: ConnectionGraphicsItem[] = [];
-		const nodes: NodeGraphicsItem[] = [];
-
-		for (const item of items) {
-			if (item instanceof FrameGraphicsItem) {
-				frames.push(<FrameGraphicsItem>item);
-			}
-			if (item instanceof CommentGraphicsItem) {
-				comments.push(<CommentGraphicsItem>item);
-			}
-			if (item instanceof NavigationGraphicsItem) {
-				navs.push(<NavigationGraphicsItem>item);
-			}
-			if (item instanceof NodeGraphicsItem) {
-				nodes.push(<NodeGraphicsItem>item);
-			}
-		}
-
-		// if nothing was deleted then return
-		if (
-			frames.length == 0 &&
-			comments.length == 0 &&
-			navs.length == 0 &&
-			nodes.length == 0
-		)
-			return;
-
-		// 2 - gather affected connections
-		const conDict = new Map<string, ConnectionGraphicsItem>();
-		for (const node of nodes) {
-			// add all connections to map
-			for (const sock of node.sockets) {
-				for (const con of sock.conns) {
-					conDict.set(con.id, con);
-				}
-			}
-		}
-		for (const [key, con] of conDict) cons.push(con);
-
-		// 3 - actual deletion
-		if (this.onitemsdeleting) {
-			this.onitemsdeleting(frames, comments, navs, cons, nodes);
-		}
-
-		for (const frame of frames) this.removeFrame(frame);
-		for (const comment of comments) this.removeComment(comment);
-		for (const nav of navs) this.removeNavigation(nav);
-		for (const node of nodes) this.deleteNode(node);
-
-		// 4 - callback
-		if (this.onitemsdeleted) {
-			this.onitemsdeleted(frames, comments, navs, cons, nodes);
-		}
-	}
-
-	getNodeById(id: string): NodeGraphicsItem {
-		for (const node of this.nodes) {
-			if (node.id == id) return node;
-		}
-		return null;
-	}
-
-	/**
-	 * Checks if adding a hypothetical connection, the graph would remain to be a directed acyclic graph (DAG).
-	 *
-	 * @param leftNode input node of the new connection
-	 * @param rightNode output node of the new connection
-	 * @returns
-	 */
-	remainsDAG(leftNode: NodeGraphicsItem, rightNode: NodeGraphicsItem) {
-		let checked = new Set();
-		checked.add(leftNode);
-
-		let expanding = [rightNode];
-		while (expanding.length > 0) {
-			let nodeA = expanding.pop();
-
-			for (let socket of nodeA.getOutSockets()) {
-				for (let conn of socket.conns) {
-					let nodeB = conn.socketB.node;
-
-					// if (checked.has(nodeB)) {
-					// if left node is hit, this means making
-					// the connection will cause a cycle
-					if (nodeB === leftNode) {
-						return false;
-					} else {
-						expanding.push(nodeB);
-						checked.add(nodeA);
-					}
-				}
-			}
-		}
-
-		return true;
-	}
-
-	addConnection(con: ConnectionGraphicsItem) {
-		this.conns.push(con);
-
-		// link the sockets
-		con.socketA.addConnection(con);
-		con.socketB.addConnection(con);
-
-		// callback
-		if (this.onconnectioncreated) this.onconnectioncreated(con);
-	}
-
-	createConnection(leftId: string, rightId: string, rightIndex = 0) {
-		const con = new ConnectionGraphicsItem();
-
-		// get nodes
-		const leftNode = this.getNodeById(leftId);
-		const rightNode = this.getNodeById(rightId);
-
-		// get sockets
-		con.socketA = leftNode.sockets.find(x => x.socketType == SocketType.Out);
-		con.socketB = rightNode.sockets[rightIndex];
-
-		this.addConnection(con);
-	}
-
-	removeConnection(con: ConnectionGraphicsItem) {
-		this.conns.splice(this.conns.indexOf(con), 1);
-		//con.socketA.con = null;
-		//con.socketB.con = null;
-		con.socketA.removeConnection(con);
-		con.socketB.removeConnection(con);
-
-		// callback
-		if (this.onconnectiondestroyed) this.onconnectiondestroyed(con);
-	}
-
-	// if the user click drags on a socket then it's making a connection
-	drawActiveConnection() {
-		const mouse = this.view.getMouseSceneSpace();
-		const mouseX = mouse.x;
-		const mouseY = mouse.y;
-
-		const ctx = this.context;
-		if (this.hitSocket) {
-			ctx.beginPath();
-			ctx.strokeStyle = "rgb(200, 200, 200)";
-			ctx.lineWidth = 4;
-			ctx.moveTo(this.hitSocket.centerX(), this.hitSocket.centerY());
-
-			if (this.hitSocket.socketType == SocketType.Out) {
-				ctx.bezierCurveTo(
-					this.hitSocket.centerX() + 60,
-					this.hitSocket.centerY(), // control point 1
-					mouseX - 60,
-					mouseY,
-					mouseX,
-					mouseY
-				);
-			} else {
-				ctx.bezierCurveTo(
-					this.hitSocket.centerX() - 60,
-					this.hitSocket.centerY(), // control point 1
-					mouseX + 60,
-					mouseY,
-					mouseX,
-					mouseY
-				);
-			}
-
-			ctx.setLineDash([5, 3]);
-			ctx.stroke();
-			ctx.setLineDash([]);
-
-			ctx.beginPath();
-			ctx.fillStyle = "rgb(200, 200, 200)";
-			const radius = 6;
-			ctx.arc(mouseX, mouseY, radius, 0, 2 * Math.PI);
-			ctx.fill();
-		}
-	}
-
-	clearAndDrawGrid() {
-		//this.context.scale(2,2);
-		// this.context.fillStyle = "rgb(120, 120, 120)";
-		// var topCorner = this.view.canvasToSceneXY(0, 0);
-		// var bottomCorner = this.view.canvasToSceneXY(
-		//   this.canvas.clientWidth,
-		//   this.canvas.clientHeight
-		// );
-		// this.context.fillRect(
-		//   topCorner.x,
-		//   topCorner.y,
-		//   bottomCorner.x - topCorner.x,
-		//   bottomCorner.y - topCorner.y
-		// );
-		//this.context.fillRect(0,0,this.canvas.width, this.canvas.height);
-
-		// todo: draw grid
-
-		this.view.clear(this.context, "#4A5050");
-		this.view.setViewMatrix(this.context);
-		this.view.drawGrid(this.context, 33.33333, "#4E5454", 1);
-		this.view.drawGrid(this.context, 100, "#464C4C", 3);
-	}
-
-	draw() {
-		this.clearAndDrawGrid();
-
-		// draw frames
-		for (const frame of this.frames) frame.draw(this.context);
-
-		// draw comments
-		for (const comment of this.comments) comment.draw(this.context);
-
-		// draw connections
-		for (const con of this.conns) {
-			if (con == this.hitConnection) continue;
-			con.draw(this.context);
-		}
-
-		if (this.hitSocket) {
-			this.drawActiveConnection();
-		}
-
-		// draw nodes
-		const mouse = this.view.getMouseSceneSpace();
-		const mouseX = mouse.x;
-		const mouseY = mouse.y;
-		const nodeState: NodeGraphicsItemRenderState = {
-			hovered: false, // mouse over
-			selected: false // selected node
-		};
-		for (const item of this.nodes) {
-			// check for selection ( only do this when not dragging anything )
-			//if (item == this.selectedNode) nodeState.selected = true;
-			//else nodeState.selected = false;
-
-			// check for hover
-			if (item.isPointInside(mouseX, mouseY) && this.hitSocket == null)
-				nodeState.hovered = true;
-			else nodeState.hovered = false;
-
-			item.draw(this.context, nodeState);
-		}
-
-		for (const nav of this.navigations) nav.draw(this.context);
-
-		if (this.selection) this.selection.draw(this.context);
-
-		if (this.selectedItems.length > 0) {
-			this.drawSelectedItems(this.selectedItems, this.context);
-		}
-	}
-
-	drawSelectedItems(items: GraphicsItem[], ctx: CanvasRenderingContext2D) {
-		for (const item of items) {
-			ctx.beginPath();
-			ctx.lineWidth = 3;
-			ctx.strokeStyle = "rgba(255, 255, 255)";
-			//this.roundRect(ctx, this.x, this.y, width, height, 1);
-			// ctx.rect(item.left, item.top, item.getWidth(), item.getHeight());
-			const rect = item.getRect();
-			rect.expand(15);
-			ctx.rect(rect.left, rect.top, rect.width, rect.height);
-
-			ctx.stroke();
-
-			ctx.fillStyle = "rgba(255, 255, 255, 0.1)";
-			ctx.rect(rect.left, rect.top, rect.width, rect.height);
-			ctx.fill();
-		}
-	}
-
-	onCopy(evt: ClipboardEvent) {
-		// todo: copy selected items to clipboard
-		//ItemClipboard.copyItems(this, evt.clipboardData);
-		if (this.oncopy) this.oncopy(evt);
-	}
-
-	onCut(evt: ClipboardEvent) {
-		// todo: copy selected items to clipboard
-		//ItemClipboard.copyItems(this, evt.clipboardData);
-		if (this.oncut) this.oncut(evt);
-	}
-
-	onPaste(evt: ClipboardEvent) {
-		// todo: paste items from clipboard
-		//ItemClipboard.pasteItems(this, evt.clipboardData);
-		if (this.onpaste) this.onpaste(evt);
-	}
-
-	// mouse events
-	onMouseDown(evt: MouseEvent) {
-		// console.log("mouse dwn!");
-		//todo: look at double event calling
-		const pos = this.getScenePos(evt);
-		const mouseX = pos.x;
-		const mouseY = pos.y;
-
-		if (evt.button == 0) {
-			const hitItem = this.getHitItem(mouseX, mouseY);
-			const mouseEvent = new MouseDownEvent();
-			mouseEvent.globalX = pos.x;
-			mouseEvent.globalY = pos.y;
-			mouseEvent.shiftKey = evt.shiftKey;
-			mouseEvent.altKey = evt.altKey;
-			mouseEvent.ctrlKey = evt.ctrlKey;
-
-			if (hitItem != null) {
-				mouseEvent.localX = hitItem.left - pos.x;
-				mouseEvent.localY = hitItem.top - pos.y;
-
-				hitItem.mouseDown(mouseEvent);
-				if (mouseEvent.isAccepted) {
-					this.hitItem = hitItem;
-
-					//console.log(hitItem);
-					if (hitItem instanceof NodeGraphicsItem) {
-						const hitNode = <NodeGraphicsItem>hitItem;
-						//move node to stop of stack
-						this.moveNodeToTop(hitNode);
-
-						if (this.onnodeselected) {
-							if (hitNode) this.onnodeselected(hitNode);
-							else this.onnodeselected(hitNode);
-						}
-					}
-
-					//todo: look at double event calling for comments
-					if (hitItem instanceof CommentGraphicsItem) {
-						const hitComment = <CommentGraphicsItem>hitItem;
-
-						if (this.oncommentselected) {
-							if (hitComment) this.oncommentselected(hitComment);
-							else this.oncommentselected(hitComment);
-						}
-					}
-
-					if (hitItem instanceof FrameGraphicsItem) {
-						const hit = <FrameGraphicsItem>hitItem;
-
-						if (this.onframeselected) {
-							if (hit) this.onframeselected(hit);
-							else this.onframeselected(hit);
-						}
-					}
-
-					if (hitItem instanceof NavigationGraphicsItem) {
-						const hit = <NavigationGraphicsItem>hitItem;
-
-						if (this.onnavigationselected) {
-							if (hit) this.onnavigationselected(hit);
-							else this.onnavigationselected(hit);
-						}
-					}
-
-					// selection graphics item can never be *selected*
-					if (
-						!(hitItem instanceof SelectionGraphicsItem) &&
-						!(hitItem instanceof SocketGraphicsItem)
-					)
-						this.selectedItems = [hitItem];
-				}
-			} else {
-				const hitItem = new SelectionGraphicsItem(this, this.view);
-				mouseEvent.localX = hitItem.left - pos.x;
-				mouseEvent.localY = hitItem.top - pos.y;
-				hitItem.mouseDown(mouseEvent);
-
-				this.selection = hitItem;
-				this.hitItem = hitItem;
-				//console.log(hitItem);
-			}
-
-			// check for a hit socket first
-			// let hitSock: SocketGraphicsItem = this.getHitSocket(mouseX, mouseY);
-
-			// if (hitSock) {
-			// 	// if socket is an in socket with a connection, make hitsocket the connected out socket
-			// 	if (
-			// 		hitSock.socketType == SocketType.In &&
-			// 		hitSock.hasConnections()
-			// 	) {
-			// 		this.hitSocket = hitSock.getConnection(0).socketA; // insockets should only have one connection
-			// 		// store connection for removal as well
-			// 		this.hitConnection = hitSock.getConnection(0);
-			// 	} else this.hitSocket = hitSock;
-			// } else {
-			// 	// if there isnt a hit socket then check for a hit node
-			// 	let hitNode: NodeGraphicsItem = this.getHitNode(mouseX, mouseY);
-
-			// 	if (hitNode) {
-			// 		//move node to stop of stack
-			// 		this.moveNodeToTop(hitNode);
-
-			// 		// todo: do this properly on mouse release
-			// 		this.selectedNode = hitNode;
-			// 	} else {
-			// 		this.selectedNode = null;
-			// 	}
-
-			// 	this.draggedNode = hitNode;
-			// 	if (this.onnodeselected) {
-			// 		if (hitNode) this.onnodeselected(hitNode);
-			// 		else this.onnodeselected(hitNode);
-			// 	}
-			// }
-		}
-	}
-
-	// https://stackoverflow.com/questions/5306680/move-an-array-element-from-one-array-position-to-another
-	moveNodeToTop(node: NodeGraphicsItem) {
-		const index = this.nodes.indexOf(node);
-		if (index === -1) {
-			console.log("Attempting to push node that doesnt exist in node list");
-		}
-		this.nodes.splice(index, 1);
-		this.nodes.push(node);
-	}
-
-	onMouseUp(evt: MouseEvent) {
-		const pos = this.getScenePos(evt);
-		const mouseX = pos.x;
-		const mouseY = pos.y;
-
-		if (evt.button == 0) {
-			if (this.hitItem != null) {
-				const hitItem = this.hitItem;
-
-				const mouseEvent = new MouseUpEvent();
-				mouseEvent.globalX = pos.x;
-				mouseEvent.globalY = pos.y;
-				mouseEvent.localX = hitItem.left - pos.x;
-				mouseEvent.localY = hitItem.top - pos.y;
-				mouseEvent.shiftKey = evt.shiftKey;
-				mouseEvent.altKey = evt.altKey;
-				mouseEvent.ctrlKey = evt.ctrlKey;
-
-				hitItem.mouseUp(mouseEvent);
-
-				this.hitItem = null;
-			}
-		}
-
-		// if (evt.button == 0) {
-		// 	if (this.hitSocket) {
-		// 		// remove previous connection
-		// 		// this block creates a new connection regardless of the outcome
-		// 		if (this.hitConnection) {
-		// 			this.removeConnection(this.hitConnection);
-		// 			this.hitConnection = null;
-		// 		}
-
-		// 		let closeSock: SocketGraphicsItem = this.getHitSocket(
-		// 			mouseX,
-		// 			mouseY
-		// 		);
-
-		// 		if (
-		// 			closeSock &&
-		// 			closeSock != this.hitSocket &&
-		// 			closeSock.socketType != this.hitSocket.socketType &&
-		// 			closeSock.node != this.hitSocket.node
-		// 		) {
-		// 			// close socket
-		// 			var con: ConnectionGraphicsItem = new ConnectionGraphicsItem();
-		// 			// out socket should be on the left, socketA
-		// 			if (this.hitSocket.socketType == SocketType.Out) {
-		// 				// out socket
-		// 				con.socketA = this.hitSocket;
-		// 				con.socketB = closeSock;
-
-		// 				// close sock is an inSocket which means it should only have one connection
-		// 				// remove current connection from inSocket
-		// 				if (closeSock.hasConnections())
-		// 					this.removeConnection(closeSock.getConnection(0));
-		// 			} else {
-		// 				// in socket
-		// 				con.socketA = closeSock;
-		// 				con.socketB = this.hitSocket;
-		// 			}
-
-		// 			// link connection
-		// 			//con.socketA.con = con;
-		// 			//con.socketB.con = con;
-
-		// 			this.addConnection(con);
-		// 		} else if (!closeSock) {
-		// 			// delete connection if hit node is an insock
-		// 			// if we're here it means one of 2 things:
-		// 			// 1: a new connection failed to form
-		// 			// 2: we're breaking a previously formed connection, which can only be done
-		// 			// by dragging from an insock that already has a connection
-
-		// 			if (this.hitSocket.socketType == SocketType.Out) {
-		// 				/*
-		//                 if (this.hitSocket.hasConnections()) {
-		//                     // remove connection
-		//                     //let con = this.hitSocket.con;
-		//                     this.removeConnection(this.hitSocket.getConnectionFrom(this.hitSocket));
-		//                 }
-		//                 */
-
-		// 				if (this.hitConnection)
-		// 					this.removeConnection(this.hitConnection);
-		// 			}
-		// 		}
-		// 	}
-
-		// 	this.draggedNode = null;
-		// 	this.hitSocket = null;
-		// 	this.hitConnection = null;
-		// }
-	}
-
-	onMouseMove(evt: MouseEvent) {
-		const pos = this.getScenePos(evt);
-
-		if (this.hitItem) {
-			const mouseEvent = new MouseMoveEvent();
-			mouseEvent.globalX = pos.x;
-			mouseEvent.globalY = pos.y;
-
-			mouseEvent.localX = this.hitItem.left - pos.x;
-			mouseEvent.localY = this.hitItem.top - pos.y;
-
-			mouseEvent.shiftKey = evt.shiftKey;
-			mouseEvent.altKey = evt.altKey;
-			mouseEvent.ctrlKey = evt.ctrlKey;
-
-			const drag = this.view.getMouseDeltaSceneSpace();
-			mouseEvent.deltaX = drag.x;
-			mouseEvent.deltaY = drag.y;
-
-			this.hitItem.mouseMove(mouseEvent);
-		} else {
-			// do mouse over
-			const hitItem = this.getHitItem(pos.x, pos.y);
-			if (hitItem) {
-				const mouseEvent = new MouseOverEvent();
-				mouseEvent.globalX = pos.x;
-				mouseEvent.globalY = pos.y;
-
-				mouseEvent.localX = hitItem.left - pos.x;
-				mouseEvent.localY = hitItem.top - pos.y;
-
-				mouseEvent.shiftKey = evt.shiftKey;
-				mouseEvent.altKey = evt.altKey;
-				mouseEvent.ctrlKey = evt.ctrlKey;
-
-				hitItem.mouseOver(mouseEvent);
-			} else {
-				// reset pointer
-				this.view.canvas.style.cursor = "default";
-			}
-		}
-
-		// // handle dragged socket
-		// if (this.hitSocket) {
-		// }
-
-		// // handle dragged node
-		// if (this.draggedNode != null) {
-		// 	//var diff = this.view.canvasToSceneXY(evt.movementX, evt.movementY);
-		// 	//console.log("move: ",evt.movementX,evt.movementY);
-		// 	//this.draggedNode.move(evt.movementX, evt.movementY);
-
-		// 	// view keeps track of dragging
-		// 	let drag = this.view.getMouseDeltaSceneSpace();
-		// 	this.draggedNode.move(drag.x, drag.y);
-		// }
-	}
-
-	// hit detection
-	// x and y are scene space
-	getHitNode(x: number, y: number): NodeGraphicsItem {
-		// for (let node of this.nodes) {
-		for (let index = this.nodes.length - 1; index >= 0; index--) {
-			const node = this.nodes[index];
-			if (node.isPointInside(x, y)) return node;
-		}
-
-		return null;
-	}
-
-	getHitSocket(x: number, y: number): SocketGraphicsItem {
-		for (const node of this.nodes) {
-			for (const sock of node.sockets) {
-				if (sock.isPointInside(x, y)) return sock;
-			}
-		}
-
-		return null;
-	}
-
-	// gets item over mouse x and y
-	// obeys precedence
-	getHitItem(x: number, y: number): GraphicsItem {
-		const hitItem = this._getHitItem(x, y);
-
-		// if item is in selection then return whole selection
-		if (
-			hitItem != null &&
-			this.isItemSelected(hitItem) &&
-			this.selection != null
-		) {
-			if (this.selection.isPointInside(x, y)) return this.selection;
-		}
-
-		return hitItem;
-	}
-
-	_getHitItem(x: number, y: number): GraphicsItem {
-		// 1) navigation pins
-		for (let index = this.navigations.length - 1; index >= 0; index--) {
-			const nav = this.navigations[index];
-
-			if (nav.isPointInside(x, y)) return nav;
-		}
-
-		// 2) nodes and their sockets
-		for (let index = this.nodes.length - 1; index >= 0; index--) {
-			const node = this.nodes[index];
-
-			for (const sock of node.sockets) {
-				if (sock.isPointInside(x, y)) return sock;
-			}
-
-			if (node.isPointInside(x, y)) return node;
-		}
-
-		// 3) comments
-		for (let index = this.comments.length - 1; index >= 0; index--) {
-			const comment = this.comments[index];
-
-			if (comment.isPointInside(x, y)) return comment;
-		}
-
-		// 4) frame
-		for (let index = this.frames.length - 1; index >= 0; index--) {
-			const frame = this.frames[index];
-
-			if (frame.isPointInside(x, y)) return frame;
-		}
-
-		return null;
-	}
-
-	isItemSelected(hitItem): boolean {
-		// todo: use dictionary
-		for (const item of this.selectedItems) if (item == hitItem) return true;
-		return false;
-	}
-
-	// UTILITY
-
-	// returns the scene pos from the mouse event
-	getScenePos(evt: MouseEvent) {
-		const canvasPos = _getMousePos(this.canvas, evt);
-		return this.view.canvasToSceneXY(canvasPos.x, canvasPos.y);
-	}
-
-	// SAVE/LOAD
-
-	// only save position data to associative array
-	save(): any {
-		const data: any = {};
-
-		// NODES
-		const nodes = {};
-		for (const node of this.nodes) {
-			const n: any = {};
-			n["id"] = node.id;
-			n["x"] = node.centerX();
-			n["y"] = node.centerY();
-
-			nodes[node.id] = n;
-		}
-		data["nodes"] = nodes;
-
-		// FRAMES
-		const frames = [];
-		for (const frame of this.frames) {
-			const n: any = {};
-			n["x"] = frame.left;
-			n["y"] = frame.top;
-			n["width"] = frame.getWidth();
-			n["height"] = frame.getHeight();
-
-			n["title"] = frame.title;
-			n["showTitle"] = frame.showTitle;
-			n["description"] = frame.description;
-			n["color"] = frame.color.toHex();
-
-			frames.push(n);
-		}
-		data["frames"] = frames;
-
-		// COMMENTS
-		const comments = [];
-		for (const comment of this.comments) {
-			const n: any = {};
-			n["x"] = comment.left;
-			n["y"] = comment.top;
-
-			n["text"] = comment.text;
-			n["color"] = comment.color.toHex();
-
-			comments.push(n);
-		}
-		data["comments"] = comments;
-
-		// NAVIGATIONS
-		const navs = [];
-		for (const nav of this.navigations) {
-			const n: any = {};
-			n["x"] = nav.left;
-			n["y"] = nav.top;
-
-			navs.push(n);
-		}
-		data["navigations"] = navs;
-
-		return data;
-	}
-
-	static load(
-		designer: Designer,
-		data: any,
-		canvas: HTMLCanvasElement
-	): NodeScene {
-		const s = new NodeScene(canvas);
-
-		// add nodes one by one
-		for (const dNode of designer.nodes) {
-			// create node from designer
-			const node = new NodeGraphicsItem(dNode.title);
-			for (const input of dNode.getInputs()) {
-				node.addSocket(input, input, SocketType.In);
-			}
-			node.addSocket("output", "output", SocketType.Out);
-			s.addNode(node);
-			node.id = dNode.id;
-
-			// get position
-			const x = data["nodes"][node.id].x;
-			const y = data["nodes"][node.id].y;
-			node.setCenter(x, y);
-		}
-
-		// add connection one by one
-		for (const dcon of designer.conns) {
-			const con = new ConnectionGraphicsItem();
-			con.id = dcon.id;
-
-			// get nodes
-			const leftNode = s.getNodeById(dcon.leftNode.id);
-			const rightNode = s.getNodeById(dcon.rightNode.id);
-
-			// get sockets
-			con.socketA = leftNode.getOutSocketByName(dcon.leftNodeOutput);
-			con.socketB = rightNode.getInSocketByName(dcon.rightNodeInput);
-
-			s.addConnection(con);
-		}
-
-		//todo: integrity checks
-		// FRAMES
-		if (data.frames) {
-			for (const d of data.frames) {
-				const frame = new FrameGraphicsItem(s.view);
-				frame.setPos(d.x, d.y);
-				frame.setSize(d.width, d.height);
-
-				frame.setTitle(d.title);
-				frame.setShowTitle(d.showTitle);
-				frame.setDescription(d.description);
-				frame.color = Color.parse(d.color);
-
-				s.addFrame(frame);
-			}
-		}
-
-		// COMMENTS
-		if (data.comments) {
-			for (const d of data.comments) {
-				const comment = new CommentGraphicsItem(s.view);
-				comment.setPos(d.x, d.y);
-				comment.setText(d.text);
-				comment.color = Color.parse(d.color);
-
-				s.addComment(comment);
-			}
-		}
-
-		// NAVIGATION
-		if (data.navigations) {
-			for (const d of data.navigations) {
-				const nav = new NavigationGraphicsItem();
-				nav.setPos(d.x, d.y);
-				s.addNavigation(nav);
-			}
-		}
-
-		return s;
-	}
-}
-
-// https://www.html5canvastutorials.com/advanced/html5-canvas-mouse-coordinates/
-// https://stackoverflow.com/questions/17130395/real-mouse-position-in-canvas
-function _getMousePos(canvas, evt) {
-	const rect = canvas.getBoundingClientRect();
-	return {
-		x: evt.clientX - rect.left,
-		y: evt.clientY - rect.top
-	};
-}
diff --git a/src/lib/scene/commentgraphicsitem.ts b/src/lib/scene/commentgraphicsitem.ts
deleted file mode 100644
index 116d1457..00000000
--- a/src/lib/scene/commentgraphicsitem.ts
+++ /dev/null
@@ -1,202 +0,0 @@
-import { SocketGraphicsItem } from "./socketgraphicsitem";
-import {
-	GraphicsItem,
-	MouseDownEvent,
-	MouseMoveEvent,
-	MouseUpEvent
-} from "./graphicsitem";
-import { SceneView, Vector2 } from "./view";
-import { Color } from "../designer/color";
-import {
-	IPropertyHolder,
-	Property,
-	PropertyGroup,
-	StringProperty
-} from "../designer/properties";
-import { MoveItemsAction } from "../actions/moveItemsaction";
-import { UndoStack } from "../undostack";
-
-// https://stackoverflow.com/questions/5026961/html5-canvas-ctx-filltext-wont-do-line-breaks
-export class CommentGraphicsItem extends GraphicsItem
-	implements IPropertyHolder {
-	text: string;
-	textProp: StringProperty;
-	view: SceneView;
-	color: Color;
-
-	padding: number;
-	fontHeight: number;
-
-	hit: boolean;
-	dragged: boolean;
-	dragStartPos: Vector2;
-
-	constructor(view: SceneView) {
-		super();
-		this.text = "";
-		this.view = view;
-		this.color = new Color(0.9, 0.9, 0.9);
-
-		this.hit = false;
-		this.dragged = false;
-
-		this.padding = 5;
-		this.fontHeight = 20;
-
-		this.textProp = new StringProperty("comment", "Comment", "Comment.", true);
-		this.properties.push(this.textProp);
-
-		this.setText("comment");
-	}
-	propertyGroups: PropertyGroup[];
-
-	properties: Property[] = [];
-	setProperty(name: string, value: any) {
-		const prop = this.properties.find(x => {
-			return x.name == name;
-		});
-
-		// if (prop) {
-		// 	prop.setValue(value);
-		// }
-
-		if (name == "comment") {
-			this.setText(value);
-		}
-	}
-
-	setText(text: string) {
-		this.text = text;
-		this.textProp.setValue(text);
-		const fontHeight = this.fontHeight;
-
-		const ctx = this.view.context;
-
-		ctx.lineWidth = 1;
-		ctx.font = fontHeight + "px 'Open Sans'";
-		const size = ctx.measureText(this.text);
-
-		let maxWidth = 0;
-		const lines = this.text.split("\n");
-		// console.log(lines);
-		// console.log(ctx);
-		// console.log(ctx.font);
-		for (let i = 0; i < lines.length; ++i) {
-			const size = ctx.measureText(lines[i]);
-			//console.log("INITIAL WITH: " + size.width);
-			maxWidth = Math.max(maxWidth, size.width);
-		}
-
-		// somewhat inaccurate here for some reason
-		// maybe some bug in html5 canvas
-		// recalculate in draw function
-		this.width = maxWidth + this.padding * 2;
-		this.height = lines.length * fontHeight + this.padding * 2;
-	}
-
-	private buildColor(color: Color, alpha: number) {
-		const col =
-			"rgba(" +
-			color.r * 255 +
-			"," +
-			color.g * 255 +
-			"," +
-			color.b * 255 +
-			"," +
-			alpha +
-			")";
-
-		return col;
-	}
-
-	draw(ctx: CanvasRenderingContext2D, renderData: any = null) {
-		const fontHeight = this.fontHeight;
-		ctx.font = fontHeight + "px 'Open Sans'";
-		ctx.fillStyle = "rgb(240, 240, 240)";
-
-		// recalc rect
-		let maxWidth = 0;
-		//console.log(this.text);
-		const lines = this.text.split("\n");
-		for (var i = 0; i < lines.length; ++i) {
-			const size = ctx.measureText(lines[i]);
-			maxWidth = Math.max(maxWidth, size.width);
-		}
-
-		this.width = maxWidth + this.padding * 2;
-		this.height = lines.length * fontHeight + this.padding * 2;
-
-		// --------------------------------------------------------
-
-		const width = this.width;
-		const height = this.height;
-
-		// stroke bounding rect
-		ctx.beginPath();
-		ctx.lineWidth = 1;
-		ctx.strokeStyle = this.buildColor(this.color, 0.5);
-		this.roundRect(ctx, this.x, this.y, width, height, 1);
-		ctx.stroke();
-
-		// inner area
-		ctx.beginPath();
-		ctx.lineWidth = 1;
-		ctx.fillStyle = this.buildColor(this.color, 0.1);
-		this.roundRect(ctx, this.x, this.y, width, height, 1);
-		ctx.fill();
-
-		// multiline text
-		ctx.fillStyle = "rgb(240, 240, 240)";
-		const textX = this.x + this.padding;
-		let textY = this.y + fontHeight;
-
-		const lineHeight = fontHeight;
-		//var lines = this.text.split("\n");
-		ctx.font = fontHeight + "px 'Open Sans'";
-		ctx.textAlign = "left";
-		ctx.lineWidth = 1;
-
-		//console.log(ctx.font);
-		for (let i = 0; i < lines.length; ++i) {
-			ctx.fillText(lines[i], textX, textY);
-			textY += lineHeight;
-			const size = ctx.measureText(lines[i]);
-			//console.log("RENDER WITH: " + size.width);
-		}
-	}
-
-	// MOUSE EVENTS
-	public mouseDown(evt: MouseDownEvent) {
-		this.hit = true;
-		this.dragged = false;
-		this.dragStartPos = new Vector2(this.x, this.y);
-		//console.log(this.text);
-	}
-
-	public mouseMove(evt: MouseMoveEvent) {
-		if (this.hit) {
-			// movement
-			this.move(evt.deltaX, evt.deltaY);
-			this.dragged = true;
-		}
-	}
-
-	public mouseUp(evt: MouseUpEvent) {
-		this.hit = false;
-
-		// add undo/redo
-		const newPos = new Vector2(this.x, this.y);
-
-		if (this.dragged) {
-			const action = new MoveItemsAction(
-				[this],
-				[this.dragStartPos.clone()],
-				[newPos]
-			);
-
-			UndoStack.current.push(action);
-		}
-
-		this.dragged = false;
-	}
-}
diff --git a/src/lib/scene/connectiongraphicsitem.ts b/src/lib/scene/connectiongraphicsitem.ts
deleted file mode 100644
index 3055c469..00000000
--- a/src/lib/scene/connectiongraphicsitem.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import { SocketGraphicsItem } from "./socketgraphicsitem";
-import { GraphicsItem } from "./graphicsitem";
-
-export class ConnectionGraphicsItem extends GraphicsItem {
-	id!: string;
-	public socketA!: SocketGraphicsItem;
-	public socketB!: SocketGraphicsItem;
-
-	draw(ctx: CanvasRenderingContext2D, renderData: any = null) {
-		ctx.beginPath();
-		ctx.strokeStyle = "rgb(200, 200, 200)";
-		ctx.lineWidth = 4;
-		ctx.moveTo(this.socketA.centerX(), this.socketA.centerY());
-		ctx.bezierCurveTo(
-			this.socketA.centerX() + 60,
-			this.socketA.centerY(), // control point 1
-			this.socketB.centerX() - 60,
-			this.socketB.centerY(),
-			this.socketB.centerX(),
-			this.socketB.centerY()
-		);
-		ctx.stroke();
-	}
-}
diff --git a/src/lib/scene/framegraphicsitem.ts b/src/lib/scene/framegraphicsitem.ts
deleted file mode 100644
index 2a86f9f4..00000000
--- a/src/lib/scene/framegraphicsitem.ts
+++ /dev/null
@@ -1,585 +0,0 @@
-import { SocketGraphicsItem } from "./socketgraphicsitem";
-import {
-	GraphicsItem,
-	MouseDownEvent,
-	MouseMoveEvent,
-	MouseUpEvent,
-	MouseOverEvent
-} from "./graphicsitem";
-import { SceneView, Vector2, Rect } from "./view";
-import { Color } from "../designer/color";
-import { NodeGraphicsItem } from "./nodegraphicsitem";
-import {
-	IPropertyHolder,
-	Property,
-	StringProperty,
-	BoolProperty,
-	PropertyGroup
-} from "../designer/properties";
-import { MoveItemsAction } from "../actions/moveItemsaction";
-import { UndoStack } from "../undostack";
-import { ResizeFrameAction } from "../actions/resizeframeaction";
-
-enum XResizeDir {
-	None,
-	Left,
-	Right
-}
-
-enum YResizeDir {
-	None,
-	Top,
-	Bottom
-}
-
-enum DragMode {
-	None,
-	HandleTop,
-	Resize
-}
-
-export class FrameRegion {
-	rect: Rect = null;
-	dragMode: DragMode = DragMode.None;
-	xResizeDir: XResizeDir = XResizeDir.None;
-	yResizeDir: YResizeDir = YResizeDir.None;
-	cursor: string = null;
-}
-
-// https://developer.mozilla.org/en-US/docs/Web/CSS/cursor
-export class FrameGraphicsItem extends GraphicsItem implements IPropertyHolder {
-	title: string;
-	description: string;
-	showTitle: boolean;
-	view: SceneView;
-	color: Color;
-	hit: boolean;
-	dragged: boolean;
-	dragStartPos: Vector2;
-	dragStartRect: Rect;
-
-	xResize: XResizeDir;
-	yResize: YResizeDir;
-	dragMode: DragMode;
-
-	// display properties
-	handleSize: number;
-
-	// the radius of the resize handle
-	resizeHandleSize: number;
-
-	nodes: NodeGraphicsItem[];
-
-	titleProp: StringProperty;
-	showTitleProp: BoolProperty;
-	descrProp: StringProperty;
-
-	public constructor(view: SceneView) {
-		super();
-		this.title = "Frame";
-		this.description = "";
-		this.showTitle = true;
-		this.view = view;
-		this.color = new Color(0.1, 0, 0.2);
-		this.hit = false;
-		this.dragged = true;
-
-		this.xResize = XResizeDir.None;
-		this.yResize = YResizeDir.None;
-		this.dragMode = DragMode.None;
-
-		this.handleSize = 30;
-		this.resizeHandleSize = 20;
-
-		this.setSize(500, 300);
-
-		this.nodes = [];
-
-		this.titleProp = new StringProperty("title", "Title", "Frame");
-		this.showTitleProp = new BoolProperty("showtitle", "Show Title", true);
-		this.descrProp = new StringProperty("description", "Description", "", true);
-		this.properties.push(this.titleProp);
-		this.properties.push(this.showTitleProp);
-		this.properties.push(this.descrProp);
-	}
-	propertyGroups: PropertyGroup[];
-	properties: Property[] = [];
-	setProperty(name: string, value: any) {
-		if (name == "title") {
-			this.setTitle(value);
-		} else if (name == "showtitle") {
-			this.setShowTitle(value);
-		} else if (name == "description") {
-			this.setDescription(value);
-		}
-	}
-
-	setSize(w: number, h: number) {
-		this.width = w;
-		this.height = h;
-	}
-
-	setTitle(text: string) {
-		this.title = text;
-		this.titleProp.setValue(text);
-	}
-
-	setShowTitle(shouldShow: boolean) {
-		this.showTitle = shouldShow;
-		this.showTitleProp.setValue(shouldShow);
-	}
-
-	setDescription(text: string) {
-		this.description = text;
-		this.descrProp.setValue(text);
-	}
-
-	private buildColor(color: Color, alpha: number) {
-		const col =
-			"rgba(" +
-			color.r * 255 +
-			"," +
-			color.g * 255 +
-			"," +
-			color.b * 255 +
-			"," +
-			alpha +
-			")";
-		//console.log(col);
-		return col;
-	}
-
-	public setPos(x: number, y: number) {
-		// find diff
-		const diff = new Vector2(x - this.x, y - this.y);
-		super.setPos(x, y);
-
-		// do a move
-		// for (let node of this.nodes) {
-		// 	node.move(diff.x, diff.y);
-		// }
-	}
-
-	public setFrameRect(rect: Rect) {
-		this.x = rect.x;
-		this.y = rect.y;
-		this.width = rect.width;
-		this.height = rect.height;
-	}
-
-	draw(ctx: CanvasRenderingContext2D, renderData: any = null) {
-		// outer frame
-		ctx.beginPath();
-		ctx.lineWidth = 1;
-		//ctx.strokeStyle = "rgb(100, 0, 0)";
-		ctx.strokeStyle = this.buildColor(this.color, 1);
-		this.roundRect(ctx, this.x, this.y, this.width, this.height, 1);
-		ctx.stroke();
-
-		// handle
-		const handleSize = this.handleSize;
-		ctx.beginPath();
-		ctx.lineWidth = 1;
-		//ctx.fillStyle = "rgba(100, 0, 0, 0.5)";
-		ctx.fillStyle = this.buildColor(this.color, 0.5);
-		this.roundRect(ctx, this.x, this.y, this.width, handleSize, 1);
-		ctx.fill();
-
-		ctx.beginPath();
-		ctx.lineWidth = 1;
-		//ctx.strokeStyle = "rgb(100, 0, 0, 0.8)";
-		ctx.strokeStyle = this.buildColor(this.color, 0.8);
-		this.roundRect(ctx, this.x, this.y, this.width, handleSize, 1);
-		ctx.stroke();
-
-		// body
-		ctx.beginPath();
-		ctx.lineWidth = 2;
-		//ctx.fillStyle = "rgba(100, 0, 0, 0.2)";
-		ctx.fillStyle = this.buildColor(this.color, 0.2);
-		this.roundRect(
-			ctx,
-			this.x,
-			this.y + handleSize,
-			this.width,
-			this.height - handleSize,
-			1
-		);
-		ctx.fill();
-
-		// title
-		if (this.showTitle == true) {
-			ctx.beginPath();
-
-			const fontSize = 18; // * this.view.zoomFactor;
-
-			ctx.save();
-			//ctx.scale(1.0 / this.view.zoomFactor, 1.0 / this.view.zoomFactor);
-			ctx.setTransform(1, 0, 0, 1, this.view.offset.x, this.view.offset.y);
-
-			//ctx.font = fontSize + "px 'Open Sans'";
-			ctx.font = "30px 'Open Sans'";
-			ctx.fillStyle = "rgb(240, 240, 240)";
-			//let size = ctx.measureText(this.textureChannel.toUpperCase());
-			const textX = this.x;
-			const textY = this.y;
-			//ctx.fillText("Hello World", textX, textY - 5);
-			ctx.fillText(
-				this.title,
-				textX * this.view.zoomFactor,
-				(textY - 5) * this.view.zoomFactor
-			);
-
-			ctx.restore();
-		}
-
-		// debug draw frames
-		// if (false) {
-		// 	const regions = this.getFrameRegions();
-		// 	for (const region of regions) {
-		// 		const rect = region.rect;
-		// 		ctx.beginPath();
-		// 		ctx.lineWidth = 1;
-		// 		ctx.strokeStyle = "rgb(100, 0, 0, 0.8)";
-		// 		ctx.rect(rect.x, rect.y, rect.width, rect.height);
-		// 		ctx.stroke();
-		// 	}
-		// }
-	}
-
-	public isPointInside(px: number, py: number): boolean {
-		const regions = this.getFrameRegions();
-		for (const region of regions) {
-			if (region.rect.isPointInside(px, py)) {
-				return true;
-			}
-		}
-
-		// top handle
-		if (
-			px >= this.x &&
-			px <= this.x + this.width &&
-			py >= this.y &&
-			py <= this.y + this.handleSize
-		)
-			return true;
-		return false;
-	}
-
-	// MOUSE EVENTS
-	public mouseDown(evt: MouseDownEvent) {
-		this.hit = true;
-		this.dragged = false;
-
-		const px = evt.globalX;
-		const py = evt.globalY;
-
-		let hitRegion: FrameRegion = null;
-		const regions = this.getFrameRegions();
-		for (const region of regions) {
-			if (region.rect.isPointInside(px, py)) {
-				this.dragMode = region.dragMode;
-				this.xResize = region.xResizeDir;
-				this.yResize = region.yResizeDir;
-
-				this.dragStartRect = this.getRect();
-				hitRegion = region;
-				break;
-			}
-		}
-
-		// topbar
-		if (hitRegion == null) {
-			if (
-				px >= this.x &&
-				px <= this.x + this.width &&
-				py >= this.y &&
-				py <= this.y + this.handleSize
-			) {
-				this.dragMode = DragMode.HandleTop;
-				this.xResize = XResizeDir.None;
-				this.yResize = YResizeDir.None;
-
-				this.dragStartPos = new Vector2(this.x, this.y);
-
-				// capture nodes if alt key isnt pressed
-				if (!evt.altKey) this.nodes = this.getHoveredNodes();
-
-				// set cursor
-				this.view.canvas.style.cursor = "grabbing";
-			}
-		}
-	}
-
-	public mouseOver(evt: MouseOverEvent) {
-		const px = evt.globalX;
-		const py = evt.globalY;
-
-		const hitRegion: FrameRegion = null;
-		const regions = this.getFrameRegions();
-		for (const region of regions) {
-			if (region.rect.isPointInside(px, py)) {
-				this.view.canvas.style.cursor = region.cursor;
-				return;
-			}
-		}
-
-		// topbar
-		if (hitRegion == null) {
-			if (
-				px >= this.x &&
-				px <= this.x + this.width &&
-				py >= this.y &&
-				py <= this.y + this.handleSize
-			) {
-				this.view.canvas.style.cursor = "grab";
-			}
-		}
-	}
-
-	// return all scene's nodes in this frame
-	getHoveredNodes(): NodeGraphicsItem[] {
-		const nodes: NodeGraphicsItem[] = [];
-		for (const node of this.scene.nodes) {
-			// node must be entirely inside frame
-			if (
-				node.left >= this.left &&
-				node.right <= this.right &&
-				node.top >= this.top &&
-				node.bottom <= this.bottom
-			) {
-				nodes.push(node);
-			}
-		}
-
-		return nodes;
-	}
-
-	public mouseMove(evt: MouseMoveEvent) {
-		if (this.hit) {
-			// movement
-			if (this.dragMode == DragMode.HandleTop) {
-				this.move(evt.deltaX, evt.deltaY);
-
-				// move nodes
-				for (const node of this.nodes) {
-					node.move(evt.deltaX, evt.deltaY);
-				}
-			}
-
-			//todo: clamp size
-			if (this.dragMode == DragMode.Resize) {
-				if (this.xResize == XResizeDir.Left) {
-					this.left += evt.deltaX;
-					this.width -= evt.deltaX;
-				}
-				if (this.xResize == XResizeDir.Right) {
-					this.width += evt.deltaX;
-				}
-				if (this.yResize == YResizeDir.Top) {
-					this.top += evt.deltaY;
-					this.height -= evt.deltaY;
-				}
-				if (this.yResize == YResizeDir.Bottom) {
-					this.height += evt.deltaY;
-				}
-
-				// clamp
-				this.height = Math.max(
-					this.height,
-					this.handleSize + this.resizeHandleSize
-				);
-
-				this.width = Math.max(this.width, this.resizeHandleSize * 2);
-			}
-
-			this.dragged = true;
-		}
-	}
-
-	public mouseUp(evt: MouseUpEvent) {
-		// add undo/redo action
-		if (this.dragged) {
-			if (this.dragMode == DragMode.HandleTop) {
-				const newPos = new Vector2(this.x, this.y);
-				const items: GraphicsItem[] = [this];
-				const oldPosList: Vector2[] = [this.dragStartPos.clone()];
-				const newPosList: Vector2[] = [newPos];
-
-				// reverse diff: new pos to old pos
-				const diff = new Vector2(
-					this.dragStartPos.x - newPos.x,
-					this.dragStartPos.y - newPos.y
-				);
-
-				// add all captured nodes
-				for (const node of this.nodes) {
-					items.push(node);
-					// new pos is the current pos
-					const itemNewPos = new Vector2(node.left, node.top);
-					// old pos is current pos plus reverse diff
-					const itemOldPos = Vector2.add(itemNewPos, diff);
-
-					newPosList.push(itemNewPos);
-					oldPosList.push(itemOldPos);
-				}
-
-				const action = new MoveItemsAction(items, oldPosList, newPosList);
-				UndoStack.current.push(action);
-			} else if (this.dragMode == DragMode.Resize) {
-				const action = new ResizeFrameAction(
-					this,
-					this.dragStartRect.clone(),
-					this.getRect().clone()
-				);
-				UndoStack.current.push(action);
-			}
-		}
-
-		this.hit = false;
-		this.dragMode = DragMode.None;
-		this.nodes = [];
-
-		// reset cursor
-		this.view.canvas.style.cursor = "default";
-	}
-
-	getFrameRegions(): FrameRegion[] {
-		const regions: FrameRegion[] = [];
-		const frameRect = this.getRect();
-		let rect: Rect = null;
-		let region: FrameRegion = null;
-
-		// CORNERS
-
-		// bottom-right
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.right - this.resizeHandleSize;
-		rect.y = frameRect.bottom - this.resizeHandleSize;
-		rect.width = this.resizeHandleSize;
-		rect.height = this.resizeHandleSize;
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.Right;
-		region.yResizeDir = YResizeDir.Bottom;
-		region.cursor = "nwse-resize";
-		regions.push(region);
-
-		// bottom-left
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.left;
-		rect.y = frameRect.bottom - this.resizeHandleSize;
-		rect.width = this.resizeHandleSize;
-		rect.height = this.resizeHandleSize;
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.Left;
-		region.yResizeDir = YResizeDir.Bottom;
-		region.cursor = "nesw-resize";
-		regions.push(region);
-
-		// top-left
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.left;
-		rect.y = frameRect.top;
-		rect.width = this.resizeHandleSize;
-		rect.height = this.resizeHandleSize;
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.Left;
-		region.yResizeDir = YResizeDir.Top;
-		region.cursor = "nw-resize";
-		regions.push(region);
-
-		// top-right
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.right - this.resizeHandleSize;
-		rect.y = frameRect.top;
-		rect.width = this.resizeHandleSize;
-		rect.height = this.resizeHandleSize;
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.Right;
-		region.yResizeDir = YResizeDir.Top;
-		region.cursor = "ne-resize";
-		regions.push(region);
-
-		// SIDES
-
-		// left
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.left;
-		rect.y = frameRect.top;
-		rect.width = this.resizeHandleSize;
-		rect.height = frameRect.height;
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.Left;
-		region.yResizeDir = YResizeDir.None;
-		region.cursor = "w-resize";
-		regions.push(region);
-
-		// right
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.right - this.resizeHandleSize;
-		rect.y = frameRect.top;
-		rect.width = this.resizeHandleSize;
-		rect.height = frameRect.height;
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.Right;
-		region.yResizeDir = YResizeDir.None;
-		region.cursor = "e-resize";
-		regions.push(region);
-
-		// top
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.left;
-		rect.y = frameRect.top;
-		rect.width = frameRect.width;
-		rect.height = this.resizeHandleSize * 0.5; // top is thinner
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.None;
-		region.yResizeDir = YResizeDir.Top;
-		region.cursor = "n-resize";
-		regions.push(region);
-
-		// bottom
-		region = new FrameRegion();
-		rect = new Rect();
-		rect.x = frameRect.left;
-		rect.y = frameRect.bottom - this.resizeHandleSize;
-		rect.width = frameRect.width;
-		rect.height = this.resizeHandleSize;
-		region.rect = rect;
-		region.dragMode = DragMode.Resize;
-		region.xResizeDir = XResizeDir.None;
-		region.yResizeDir = YResizeDir.Bottom;
-		region.cursor = "s-resize";
-		regions.push(region);
-
-		// this is handles separately
-		// TOPBAR
-		// region = new FrameRegion();
-		// rect = new Rect();
-		// rect.x = frameRect.right - this.resizeHandleSize;
-		// rect.y = frameRect.bottom - this.resizeHandleSize;
-		// rect.width = this.resizeHandleSize;
-		// rect.height = this.resizeHandleSize;
-		// region.rect = rect;
-		// region.dragMode = DragMode.HandleTop;
-		// region.xResizeDir = XResizeDir.None;
-		// region.yResizeDir = YResizeDir.None;
-		// regions.push(region);
-
-		return regions;
-	}
-}
diff --git a/src/lib/scene/graphicsitem.ts b/src/lib/scene/graphicsitem.ts
deleted file mode 100644
index 5f7fd0b9..00000000
--- a/src/lib/scene/graphicsitem.ts
+++ /dev/null
@@ -1,199 +0,0 @@
-import { NodeScene } from "../scene";
-import { Rect, Vector2 } from "./view";
-
-export class MouseEvent {
-	// scene space
-	globalX: number;
-	globalY: number;
-
-	localX: number;
-	localY: number;
-
-	mouseButton: number;
-
-	// modifiers
-	shiftKey = false;
-	altKey = false;
-	ctrlKey = false;
-
-	// default is accepted
-	private accepted = true;
-	public accept() {
-		this.accepted = true;
-	}
-
-	public reject() {
-		this.accepted = false;
-	}
-
-	public get isAccepted() {
-		return this.accepted;
-	}
-
-	public get isRejected() {
-		return !this.accepted;
-	}
-}
-
-export class MouseDownEvent extends MouseEvent {}
-export class MouseMoveEvent extends MouseEvent {
-	deltaX: number;
-	deltaY: number;
-}
-export class MouseUpEvent extends MouseEvent {}
-export class MouseOverEvent extends MouseEvent {}
-
-export class HoverEvent extends MouseEvent {}
-
-export class GraphicsItem {
-	scene!: NodeScene;
-	protected visible = true;
-
-	protected x = 0;
-	protected y = 0;
-	protected width: number;
-	protected height: number;
-
-	public constructor() {
-		//this.scene = scene;
-		//scene.addItem(this);
-		this.width = 1;
-		this.height = 1;
-	}
-
-	// sets top-left
-	public setPos(x: number, y: number) {
-		this.x = x;
-		this.y = y;
-	}
-
-	public getPos() {
-		return new Vector2(this.x, this.y);
-	}
-
-	public setSize(w: number, h: number) {
-		this.width = w;
-		this.height = h;
-	}
-
-	public setScene(scene: NodeScene) {
-		this.scene = scene;
-	}
-
-	public isPointInside(px: number, py: number): boolean {
-		if (
-			px >= this.x &&
-			px <= this.x + this.width &&
-			py >= this.y &&
-			py <= this.y + this.height
-		)
-			return true;
-		return false;
-	}
-
-	public get left() {
-		return this.x;
-	}
-
-	public set left(value) {
-		this.x = value;
-	}
-
-	public get top() {
-		return this.y;
-	}
-
-	public set top(value) {
-		this.y = value;
-	}
-
-	public get right() {
-		return this.x + this.width;
-	}
-
-	public get bottom() {
-		return this.y + this.height;
-	}
-
-	public intersectsRect(other: Rect) {
-		if (this.left > other.right) return false;
-		if (this.right < other.left) return false;
-		if (this.bottom < other.top) return false;
-		if (this.top > other.bottom) return false;
-
-		return true;
-	}
-
-	public intersects(other: GraphicsItem) {
-		if (this.left > other.right) return false;
-		if (this.right < other.left) return false;
-		if (this.bottom < other.top) return false;
-		if (this.top > other.bottom) return false;
-
-		return true;
-	}
-
-	public getRect(): Rect {
-		const rect = new Rect();
-		rect.x = this.x;
-		rect.y = this.y;
-		rect.width = this.width;
-		rect.height = this.height;
-
-		return rect;
-	}
-
-	public setCenter(x: number, y: number) {
-		this.x = x - this.width / 2;
-		this.y = y - this.height / 2;
-	}
-
-	public centerX(): number {
-		return this.x + this.width / 2;
-	}
-
-	public centerY(): number {
-		return this.y + this.height / 2;
-	}
-
-	public getWidth(): number {
-		return this.width;
-	}
-
-	public getHeight(): number {
-		return this.height;
-	}
-
-	public move(dx: number, dy: number) {
-		this.x += dx;
-		this.y += dy;
-	}
-
-	// UTILITIES
-	// https://stackoverflow.com/questions/1255512/how-to-draw-a-rounded-rectangle-on-html-canvas
-	roundRect(ctx: CanvasRenderingContext2D, x, y, w, h, r) {
-		if (w < 2 * r) r = w / 2;
-		if (h < 2 * r) r = h / 2;
-		ctx.beginPath();
-		ctx.moveTo(x + r, y);
-		ctx.arcTo(x + w, y, x + w, y + h, r);
-		ctx.arcTo(x + w, y + h, x, y + h, r);
-		ctx.arcTo(x, y + h, x, y, r);
-		ctx.arcTo(x, y, x + w, y, r);
-		ctx.closePath();
-		//ctx.stroke();
-	}
-
-	// to be overriden
-	public draw(ctx: CanvasRenderingContext2D, renderData: any = null) {}
-
-	// MOUSE EVENTS
-
-	// STANDARD MOUSE EVENTS
-	public mouseDown(evt: MouseDownEvent) {}
-	public mouseMove(evt: MouseMoveEvent) {}
-	public mouseUp(evt: MouseUpEvent) {}
-
-	// called every frame the mouse is over this object
-	public mouseOver(evt: MouseOverEvent) {}
-}
diff --git a/src/lib/scene/navigationgraphicsitem.ts b/src/lib/scene/navigationgraphicsitem.ts
deleted file mode 100644
index 1c9e2129..00000000
--- a/src/lib/scene/navigationgraphicsitem.ts
+++ /dev/null
@@ -1,82 +0,0 @@
-import { SocketGraphicsItem } from "./socketgraphicsitem";
-import {
-	GraphicsItem,
-	MouseDownEvent,
-	MouseMoveEvent,
-	MouseUpEvent
-} from "./graphicsitem";
-import { Vector2 } from "./view";
-import { MoveItemsAction } from "../actions/moveItemsaction";
-import { UndoStack } from "../undostack";
-
-export class NavigationGraphicsItem extends GraphicsItem {
-	id!: string;
-	public socketA!: SocketGraphicsItem;
-	public socketB!: SocketGraphicsItem;
-
-	label: string;
-	hit: boolean;
-	dragged: boolean;
-	dragStartPos: Vector2;
-
-	constructor() {
-		super();
-		this.label = "";
-
-		this.hit = false;
-		this.dragged = false;
-
-		this.width = 10;
-		this.height = 10;
-	}
-
-	setLabel(label: string) {
-		this.label = label;
-	}
-
-	draw(ctx: CanvasRenderingContext2D, renderData: any = null) {
-		ctx.beginPath();
-		ctx.strokeStyle = "rgb(200, 200, 200)";
-		ctx.lineWidth = 4;
-		ctx.arc(this.centerX(), this.centerY(), this.width, 0, Math.PI * 2);
-		ctx.fill();
-		ctx.strokeStyle = "rgb(200, 0, 0)";
-		ctx.stroke();
-
-		ctx.fillText(this.label, this.x + 5, this.y);
-	}
-
-	// MOUSE EVENTS
-	public mouseDown(evt: MouseDownEvent) {
-		this.hit = true;
-		this.dragged = false;
-		this.dragStartPos = new Vector2(this.x, this.y);
-	}
-
-	public mouseMove(evt: MouseMoveEvent) {
-		if (this.hit) {
-			// movement
-			this.move(evt.deltaX, evt.deltaY);
-			this.dragged = true;
-		}
-	}
-
-	public mouseUp(evt: MouseUpEvent) {
-		this.hit = false;
-
-		// add undo/redo
-		const newPos = new Vector2(this.x, this.y);
-
-		if (this.dragged) {
-			const action = new MoveItemsAction(
-				[this],
-				[this.dragStartPos.clone()],
-				[newPos]
-			);
-
-			UndoStack.current.push(action);
-		}
-
-		this.dragged = false;
-	}
-}
diff --git a/src/lib/scene/nodegraphicsitem.ts b/src/lib/scene/nodegraphicsitem.ts
deleted file mode 100644
index 5b308241..00000000
--- a/src/lib/scene/nodegraphicsitem.ts
+++ /dev/null
@@ -1,294 +0,0 @@
-import { SocketGraphicsItem, SocketType } from "./socketgraphicsitem";
-import { ImageCanvas } from "../designer/imagecanvas";
-import {
-	GraphicsItem,
-	MouseDownEvent,
-	MouseMoveEvent,
-	MouseUpEvent
-} from "./graphicsitem";
-import { NodeScene } from "../scene";
-import { Vector2 } from "./view";
-import { MoveItemsAction } from "../actions/moveItemsaction";
-import { UndoStack } from "../undostack";
-
-export class NodeGraphicsItemRenderState {
-	hovered = false;
-	selected = false;
-}
-
-export class NodeGraphicsItem extends GraphicsItem {
-	id!: string;
-	sockets: SocketGraphicsItem[] = [];
-	public title: string;
-	thumbnail!: HTMLImageElement;
-	imageCanvas: ImageCanvas;
-
-	processingTime: number;
-
-	hit: boolean;
-
-	// albedo, normal, height, etc...
-	textureChannel: string;
-
-	dragStartPos: Vector2;
-
-	constructor(title: string) {
-		super();
-		this.width = 100;
-		this.height = 100;
-		this.title = title;
-		this.imageCanvas = new ImageCanvas();
-		this.processingTime = 0;
-		this.hit = false;
-	}
-
-	public setScene(scene: NodeScene) {
-		this.scene = scene;
-
-		for (const sock of this.sockets) sock.setScene(scene);
-	}
-
-	public setTextureChannel(name: string) {
-		this.textureChannel = name;
-	}
-
-	public clearTextureChannel() {
-		this.textureChannel = null;
-	}
-
-	public setThumbnail(thumbnail: HTMLImageElement) {
-		this.thumbnail = thumbnail;
-	}
-
-	public move(dx: number, dy: number) {
-		this.x += dx;
-		this.y += dy;
-		for (const sock of this.sockets) {
-			sock.move(dx, dy);
-		}
-	}
-
-	draw(ctx: CanvasRenderingContext2D, renderData: any) {
-		const renderState = <NodeGraphicsItemRenderState>renderData;
-
-		// border
-		if (renderState.selected) {
-			ctx.strokeStyle = "rgb(255, 255, 255)";
-			ctx.beginPath();
-			ctx.lineWidth = 8;
-			//ctx.rect(this.x, this.y, this.width, this.height);
-			this.roundRect(ctx, this.x, this.y, this.width, this.height, 2);
-			ctx.stroke();
-		}
-
-		// background
-		ctx.beginPath();
-		ctx.fillStyle = "rgb(0, 0, 0)";
-		ctx.rect(this.x, this.y, this.width, this.height);
-		ctx.fill();
-
-		// thumbnail if any
-		if (this.thumbnail) {
-			//ctx.drawImage(this.thumbnail,this.x, this.y, this.width, this.height);
-		}
-
-		ctx.drawImage(
-			this.imageCanvas.canvas,
-			this.x,
-			this.y,
-			this.width,
-			this.height
-		);
-
-		// title
-		if (!renderState.hovered) {
-			ctx.beginPath();
-			ctx.fillStyle = "rgb(0,0,0)";
-			ctx.rect(this.x, this.y, this.width, 20);
-			ctx.fill();
-
-			ctx.beginPath();
-			//ctx.font = "14px monospace";
-			ctx.font = "bold 9px 'Open Sans'";
-			ctx.fillStyle = "rgb(255,255,255)";
-			const size = ctx.measureText(this.title);
-			const textX = this.centerX() - size.width / 2;
-			const textY = this.y + 14;
-			ctx.fillText(this.title, textX, textY);
-		}
-
-		// DRAW SHAPE
-		ctx.beginPath();
-		ctx.lineWidth = 4;
-		// if (renderState.selected) ctx.strokeStyle = "rgb(255, 255, 255)";
-		// else ctx.strokeStyle = "rgb(0, 0, 0)";
-		ctx.strokeStyle = "rgb(0, 0, 0)";
-		//ctx.rect(this.x, this.y, this.width, this.height);
-		this.roundRect(ctx, this.x, this.y, this.width, this.height, 2);
-		ctx.stroke();
-
-		for (const sock of this.sockets) {
-			sock.draw(ctx, renderState);
-		}
-
-		// processing time
-		ctx.beginPath();
-		let procTime = "calculating..";
-		if (this.processingTime >= 0) procTime = this.processingTime + "ms";
-
-		ctx.font = "bold 9px 'Open Sans'";
-		ctx.fillStyle = "rgb(255,255,255)";
-		const size = ctx.measureText(procTime);
-		const textX = this.centerX() - size.width / 2;
-		const textY = this.y + this.height + 14;
-		ctx.fillText(procTime, textX, textY);
-
-		// texture channel
-		if (this.textureChannel) {
-			ctx.beginPath();
-			//ctx.font = "14px monospace";
-			ctx.font = "12px 'Open Sans'";
-			ctx.fillStyle = "rgb(200, 255, 200)";
-			const size = ctx.measureText(this.textureChannel.toUpperCase());
-			const textX = this.centerX() - size.width / 2;
-			//const textY = this.y + this.height + 14;
-
-			const textY = this.y - 12;
-			ctx.fillText(this.textureChannel.toUpperCase(), textX, textY);
-		}
-	}
-
-	public setPos(x: number, y: number) {
-		super.setPos(x, y);
-		this.sortSockets();
-	}
-
-	public setCenter(x: number, y: number) {
-		super.setCenter(x, y);
-		this.sortSockets();
-	}
-
-	public sortSockets() {
-		let socks = this.getInSockets();
-
-		// top and bottom padding for sockets
-		const pad = socks.length < 5 ? 10 : 0;
-
-		// sort in sockets
-		let incr = (this.height - pad * 2) / socks.length;
-		let mid = incr / 2.0;
-		let i = 0;
-		for (const sock of socks) {
-			const y = pad + i * incr + mid;
-			const x = this.x;
-			sock.setCenter(x, this.y + y);
-			i++;
-		}
-
-		// sort out sockets
-		socks = this.getOutSockets();
-		incr = (this.height - pad * 2) / socks.length;
-		mid = incr / 2.0;
-		i = 0;
-		for (const sock of socks) {
-			const y = pad + i * incr + mid;
-			const x = this.x + this.width;
-			sock.setCenter(x, this.y + y);
-			i++;
-		}
-	}
-
-	getInSockets() {
-		const array: SocketGraphicsItem[] = [];
-		for (const sock of this.sockets) {
-			if (sock.socketType == SocketType.In) array.push(sock);
-		}
-
-		return array;
-	}
-
-	getInSocketByName(name: string): SocketGraphicsItem {
-		for (const sock of this.sockets) {
-			if (sock.socketType == SocketType.In)
-				if (sock.title == name)
-					//todo: separate title from name
-					return sock;
-		}
-
-		return null;
-	}
-
-	getOutSockets() {
-		const array: SocketGraphicsItem[] = [];
-		for (const sock of this.sockets) {
-			if (sock.socketType == SocketType.Out) array.push(sock);
-		}
-
-		return array;
-	}
-
-	getOutSocketByName(name: string): SocketGraphicsItem {
-		// blank or empty name means first out socket
-		if (!name) {
-			const socks = this.getOutSockets();
-			if (socks.length > 0) return socks[0];
-			else {
-				console.log(
-					"[warning] attempting to get  output socket from node with no output sockets"
-				);
-				return null;
-			}
-		}
-
-		for (const sock of this.sockets) {
-			if (sock.socketType == SocketType.Out)
-				if (sock.title == name)
-					//todo: separate title from name
-					return sock;
-		}
-
-		return null;
-	}
-
-	// adds socket to node
-	public addSocket(name: string, id: string, type: SocketType) {
-		const sock = new SocketGraphicsItem();
-		sock.id = id;
-		sock.title = name;
-		sock.node = this;
-		sock.socketType = type;
-		this.sockets.push(sock);
-
-		this.sortSockets();
-	}
-
-	// MOUSE EVENTS
-	public mouseDown(evt: MouseDownEvent) {
-		this.hit = true;
-		this.dragStartPos = new Vector2(this.x, this.y);
-	}
-
-	public mouseMove(evt: MouseMoveEvent) {
-		if (this.hit) {
-			// movement
-			this.move(evt.deltaX, evt.deltaY);
-		}
-	}
-
-	public mouseUp(evt: MouseUpEvent) {
-		this.hit = false;
-
-		// add undo/redo
-		const newPos = new Vector2(this.x, this.y);
-
-		if (newPos.x != this.dragStartPos.x || newPos.y != this.dragStartPos.y) {
-			const action = new MoveItemsAction(
-				[this],
-				[this.dragStartPos.clone()],
-				[newPos]
-			);
-
-			UndoStack.current.push(action);
-		}
-	}
-}
diff --git a/src/lib/scene/selectiongraphicsitem.ts b/src/lib/scene/selectiongraphicsitem.ts
deleted file mode 100644
index 88a74abf..00000000
--- a/src/lib/scene/selectiongraphicsitem.ts
+++ /dev/null
@@ -1,279 +0,0 @@
-import { SocketGraphicsItem } from "./socketgraphicsitem";
-import {
-	GraphicsItem,
-	MouseDownEvent,
-	MouseMoveEvent,
-	MouseUpEvent
-} from "./graphicsitem";
-import { SceneView, Vector2, Rect } from "./view";
-import { Color } from "../designer/color";
-import {
-	IPropertyHolder,
-	Property,
-	StringProperty
-} from "../designer/properties";
-import { NodeScene } from "../scene";
-import { MoveItemsAction } from "../actions/moveItemsaction";
-import { UndoStack } from "../undostack";
-import { FrameGraphicsItem } from "./framegraphicsitem";
-
-// https://stackoverflow.com/questions/5026961/html5-canvas-ctx-filltext-wont-do-line-breaks
-export class SelectionGraphicsItem extends GraphicsItem {
-	view: SceneView;
-	color: Color;
-
-	padding: number;
-	fontHeight: number;
-
-	tooSmallSize: number;
-
-	hit: boolean;
-	dragged: boolean;
-	items: GraphicsItem[];
-	draggableItems: GraphicsItem[]; // list with items and frame's items for dragging
-	itemsDragStartPos: Vector2[];
-
-	constructor(scene: NodeScene, view: SceneView) {
-		super();
-		this.scene = scene;
-		this.view = view;
-		this.color = new Color(0.9, 0.9, 0.9);
-		this.items = [];
-		this.itemsDragStartPos = [];
-
-		this.hit = false;
-		this.dragged = false;
-
-		this.padding = 5;
-		this.fontHeight = 20;
-
-		this.tooSmallSize = 5;
-	}
-
-	public isPointInside(px: number, py: number): boolean {
-		//todo: loop through child items rect to see if a hit is made
-		for (const item of this.items) {
-			if (
-				px >= item.left &&
-				px <= item.left + item.getWidth() &&
-				py >= item.top &&
-				py <= item.top + item.getHeight()
-			)
-				return true;
-		}
-
-		return false;
-	}
-
-	draw(ctx: CanvasRenderingContext2D, renderData: any = null) {
-		// should only display if hit or has items
-		if (this.hit == false && this.items.length == 0) return;
-
-		const width = this.width;
-		const height = this.height;
-
-		if (this.items.length == 0) {
-			if (!this.isTooSmall()) {
-				// stroke bounding rect
-				ctx.beginPath();
-				ctx.lineWidth = 3;
-				ctx.strokeStyle = "rgb(250, 250, 250)";
-				//this.roundRect(ctx, this.x, this.y, width, height, 1);
-				ctx.rect(this.x, this.y, width, height);
-
-				ctx.setLineDash([5, 3]);
-				ctx.stroke();
-				ctx.setLineDash([]);
-
-				// if hit, then mouse is being dragged, these items are temporary
-				const items = this.getHitItems();
-				this.drawSelectedItems(items, ctx);
-			}
-		} else {
-			//this.drawSelectedItems(this.items, ctx);
-		}
-	}
-
-	drawSelectedItems(items: GraphicsItem[], ctx: CanvasRenderingContext2D) {
-		for (const item of items) {
-			ctx.beginPath();
-			ctx.lineWidth = 2;
-			ctx.strokeStyle = "rgba(250, 250, 250)";
-			//this.roundRect(ctx, this.x, this.y, width, height, 1);
-			// ctx.rect(item.left, item.top, item.getWidth(), item.getHeight());
-			const rect = item.getRect();
-			rect.expand(15);
-			ctx.rect(rect.left, rect.top, rect.width, rect.height);
-
-			ctx.stroke();
-
-			ctx.fillStyle = "rgba(255, 255, 255, 0.1)";
-			ctx.rect(rect.left, rect.top, rect.width, rect.height);
-			ctx.fill();
-		}
-		ctx.setLineDash([]);
-	}
-
-	/**
-	 * If user drags left of up, the width or height becomes negative
-	 * This returns a rect with positive dimensions
-	 */
-	getPositiveRect(): Rect {
-		const rect = new Rect();
-		rect.x = this.x;
-		rect.y = this.y;
-
-		rect.width = Math.abs(this.width);
-		rect.height = Math.abs(this.height);
-
-		if (this.width < 0) rect.x += this.width;
-		if (this.height < 0) rect.y += this.height;
-
-		return rect;
-	}
-
-	// for manually setting the hit items
-	setHitItems(items: GraphicsItem[]) {
-		this.items = items;
-		this.draggableItems = this.getDraggableHitItems(this.items);
-	}
-
-	getHitItems(): GraphicsItem[] {
-		const items: GraphicsItem[] = [];
-		const rect = this.getPositiveRect();
-
-		for (const node of this.scene.nodes) {
-			if (node.intersectsRect(rect)) {
-				items.push(node);
-			}
-		}
-
-		for (const item of this.scene.comments) {
-			if (item.intersectsRect(rect)) {
-				items.push(item);
-			}
-		}
-
-		// Frames are treated differently
-		// check if any of the sides were hit
-		// by the selection box for a valid selection
-		for (const item of this.scene.frames) {
-			const frame = <FrameGraphicsItem>item;
-			const regions = frame.getFrameRegions();
-			for (const region of regions) {
-				if (region.rect.intersects(rect)) {
-					items.push(item);
-					break;
-				}
-			}
-		}
-
-		for (const item of this.scene.navigations) {
-			if (item.intersectsRect(rect)) {
-				items.push(item);
-			}
-		}
-
-		return items;
-	}
-
-	// todo: ultra slow!
-	// does frame * scenenodes check per frame
-	getDraggableHitItems(hitItems: GraphicsItem[]): GraphicsItem[] {
-		const items: Set<GraphicsItem> = new Set<GraphicsItem>();
-
-		hitItems.forEach((i: GraphicsItem) => {
-			items.add(i);
-
-			if (i instanceof FrameGraphicsItem) {
-				const captured = (<FrameGraphicsItem>i).getHoveredNodes();
-				captured.forEach(c => items.add(c));
-			}
-		});
-
-		const results: GraphicsItem[] = [];
-		items.forEach((i: GraphicsItem) => results.push(i));
-
-		return results;
-	}
-
-	// MOUSE EVENTS
-
-	// This graphics item has two phases
-	// the first phase is about selecting items
-	// the second phase is about dragging
-	// after the first phase, items will not be empty
-	// if there is a mouse event and items is not empty
-	// then its in drag mode
-	public mouseDown(evt: MouseDownEvent) {
-		this.hit = true;
-		this.dragged = false;
-
-		if (this.items.length > 0) {
-			this.captureDragStarts();
-		} else {
-			this.x = evt.globalX;
-			this.y = evt.globalY;
-			this.scene.setSelectedItems([]);
-		}
-	}
-
-	public mouseMove(evt: MouseMoveEvent) {
-		if (this.items.length > 0) {
-			for (const item of this.draggableItems) {
-				item.move(evt.deltaX, evt.deltaY);
-			}
-			this.dragged = true;
-		} else if (this.hit) {
-			// movement
-			this.width += evt.deltaX;
-			this.height += evt.deltaY;
-		}
-	}
-
-	public mouseUp(evt: MouseUpEvent) {
-		this.hit = false;
-		if (this.items.length == 0 && !this.isTooSmall()) {
-			this.items = this.getHitItems();
-			this.scene.setSelectedItems(this.items);
-			this.draggableItems = this.getDraggableHitItems(this.items);
-		} else {
-			//todo: check for movement
-			if (this.dragged) this.createUndoAction();
-		}
-
-		this.dragged = false;
-	}
-
-	// UNDO-REDO
-	captureDragStarts() {
-		this.itemsDragStartPos = [];
-		for (const item of this.draggableItems) {
-			const pos = new Vector2(item.left, item.top);
-			this.itemsDragStartPos.push(pos);
-		}
-	}
-
-	isTooSmall(): boolean {
-		return (
-			Math.abs(this.width) < this.tooSmallSize ||
-			Math.abs(this.height) < this.tooSmallSize
-		);
-	}
-
-	createUndoAction() {
-		const newPosList = [];
-		for (const item of this.draggableItems) {
-			const pos = new Vector2(item.left, item.top);
-			newPosList.push(pos);
-		}
-
-		const action = new MoveItemsAction(
-			this.draggableItems,
-			this.itemsDragStartPos,
-			newPosList
-		);
-
-		UndoStack.current.push(action);
-	}
-}
diff --git a/src/lib/scene/socketgraphicsitem.ts b/src/lib/scene/socketgraphicsitem.ts
deleted file mode 100644
index 56fe288b..00000000
--- a/src/lib/scene/socketgraphicsitem.ts
+++ /dev/null
@@ -1,337 +0,0 @@
-import {
-	GraphicsItem,
-	MouseDownEvent,
-	MouseMoveEvent,
-	MouseUpEvent
-} from "./graphicsitem";
-import {
-	NodeGraphicsItem,
-	NodeGraphicsItemRenderState
-} from "./nodegraphicsitem";
-import { ConnectionGraphicsItem } from "./connectiongraphicsitem";
-import { AddConnectionAction } from "../actions/addconnectionaction";
-import { UndoStack } from "../undostack";
-import { RemoveConnectionAction } from "../actions/removeconnectionaction";
-import {
-	ConnectionSwitchAction,
-	SwitchConnectionAction
-} from "../actions/switchconnectionaction";
-
-export enum SocketType {
-	In,
-	Out
-}
-
-export class SocketGraphicsItem extends GraphicsItem {
-	public id!: string;
-	public title!: string;
-	public node!: NodeGraphicsItem;
-	public socketType!: SocketType;
-	radius = 8;
-
-	// only in sockets store the connection
-	// since outsockets can have multiple connections
-	//public con:ConnectionGraphicsItem;
-	conns: ConnectionGraphicsItem[] = [];
-
-	hit: boolean;
-	hitSocket: SocketGraphicsItem;
-	hitConnection: ConnectionGraphicsItem; // for removal
-	mouseDragX: number;
-	mouseDragY: number;
-
-	addConnection(con: ConnectionGraphicsItem) {
-		this.conns.push(con);
-	}
-	removeConnection(con: ConnectionGraphicsItem) {
-		this.conns.splice(this.conns.indexOf(con), 1);
-	}
-	getConnection(index: number): ConnectionGraphicsItem {
-		return this.conns[index];
-	}
-
-	// retruns a connection where the outSocket == socketA
-	// returns null if no result is found
-	getConnectionFrom(socketA: SocketGraphicsItem) {
-		for (const con of this.conns) {
-			if (con.socketA == socketA) return con;
-		}
-
-		return null;
-	}
-
-	// retruns a connection where the inSocket == socketB
-	// returns null if no result is found
-	getConnectionTo(socketB: SocketGraphicsItem) {
-		for (const con of this.conns) {
-			if (con.socketB == socketB) return con;
-		}
-
-		return null;
-	}
-
-	hasConnections() {
-		return this.conns.length > 0;
-	}
-
-	constructor() {
-		super();
-		this.width = this.radius * 2;
-		this.height = this.radius * 2;
-
-		this.hit = false;
-		this.hitSocket = null;
-	}
-
-	draw(ctx: CanvasRenderingContext2D, renderData: any = null) {
-		const renderState = <NodeGraphicsItemRenderState>renderData;
-
-		//console.log(this.width);
-		ctx.lineWidth = 3;
-		//ctx.rect(this.x, this.y, this.width, this.height);
-		ctx.beginPath();
-		ctx.fillStyle = "rgb(150,150,150)";
-		ctx.arc(this.centerX(), this.centerY(), this.radius, 0, 2 * Math.PI);
-		ctx.fill();
-
-		// border
-		ctx.beginPath();
-		ctx.arc(this.centerX(), this.centerY(), this.radius, 0, 2 * Math.PI);
-		ctx.strokeStyle = "rgb(0, 0, 0)";
-		ctx.stroke();
-
-		// draw inner dot if connected
-		if (this.hasConnections()) {
-			//console.log("con");
-			ctx.beginPath();
-			ctx.fillStyle = "rgb(100,100,100)";
-			ctx.arc(this.centerX(), this.centerY(), this.radius / 3, 0, 2 * Math.PI);
-			ctx.fill();
-		}
-
-		this.drawActiveConnection(ctx);
-
-		// draw text
-		if (renderState.hovered) {
-			ctx.fillStyle = "rgb(150,150,150)";
-			ctx.font = "9px 'Open Sans'";
-			if (this.socketType == SocketType.Out) {
-				const w = ctx.measureText(this.title).width;
-				ctx.fillText(this.title, this.x + this.width + 4, this.y + 12);
-			} else {
-				const w = ctx.measureText(this.title).width;
-				ctx.fillText(this.title, this.x - 4 - w, this.y + 12);
-			}
-		}
-	}
-
-	drawActiveConnection(ctx: CanvasRenderingContext2D) {
-		if (this.hitSocket) {
-			const mouseX = this.mouseDragX;
-			const mouseY = this.mouseDragY;
-
-			ctx.beginPath();
-			ctx.strokeStyle = "rgb(200, 200, 200)";
-			ctx.lineWidth = 4;
-			ctx.moveTo(this.hitSocket.centerX(), this.hitSocket.centerY());
-
-			if (this.hitSocket.socketType == SocketType.Out) {
-				ctx.bezierCurveTo(
-					this.hitSocket.centerX() + 60,
-					this.hitSocket.centerY(), // control point 1
-					mouseX - 60,
-					mouseY,
-					mouseX,
-					mouseY
-				);
-			} else {
-				ctx.bezierCurveTo(
-					this.hitSocket.centerX() - 60,
-					this.hitSocket.centerY(), // control point 1
-					mouseX + 60,
-					mouseY,
-					mouseX,
-					mouseY
-				);
-			}
-
-			ctx.setLineDash([5, 3]);
-			ctx.stroke();
-			ctx.setLineDash([]);
-		}
-	}
-
-	// MOUSE EVENTS
-	public mouseDown(evt: MouseDownEvent) {
-		this.hit = true;
-		this.hitSocket = null;
-		this.mouseDragX = evt.globalX;
-		this.mouseDragY = evt.globalY;
-
-		// if socket is an in socket with a connection, make hitsocket the connected out socket
-		if (this.socketType == SocketType.In && this.hasConnections()) {
-			this.hitSocket = this.getConnection(0).socketA; // insockets should only have one connection
-			// store connection for removal as well
-			this.hitConnection = this.getConnection(0);
-			// console.log("hit connection");
-			// console.log(this.hitConnection);
-		} else this.hitSocket = this;
-	}
-
-	public mouseMove(evt: MouseMoveEvent) {
-		if (this.hit) {
-			// movement
-			//this.move(evt.deltaX, evt.deltaY);
-			this.mouseDragX = evt.globalX;
-			this.mouseDragY = evt.globalY;
-		}
-	}
-
-	public mouseUp(evt: MouseUpEvent) {
-		const mouseX = evt.globalX;
-		const mouseY = evt.globalY;
-
-		// for undo-redo
-		const movedCons: ConnectionGraphicsItem[] = [];
-		const actions: ConnectionSwitchAction[] = [];
-
-		if (this.hitSocket) {
-			// if potential cycle in graph is found, cancel connection action quietly
-			const closeSock: SocketGraphicsItem = this.scene.getHitSocket(
-				mouseX,
-				mouseY
-			);
-
-			// check if a cyclical connection is about to be added,
-			// this can only happen when forming a new connection so no need to check
-			// for other conditions (existing connection being removed, etc...)
-			//
-			// this means one socket has to be SocketType.Out and the other should be SocketType.In
-			let remainsDAG = false;
-
-			if (closeSock) {
-				if (
-					this.hitSocket.socketType == SocketType.Out &&
-					closeSock.socketType == SocketType.In
-				)
-					remainsDAG =
-						this.scene.remainsDAG(this.hitSocket.node, closeSock.node) ||
-						remainsDAG;
-				else if (
-					this.hitSocket.socketType == SocketType.In &&
-					closeSock.socketType == SocketType.Out
-				)
-					remainsDAG =
-						this.scene.remainsDAG(closeSock.node, this.hitSocket.node) ||
-						remainsDAG;
-
-				if (!remainsDAG) {
-					this.hit = false;
-					this.hitSocket = null;
-					this.hitConnection = null;
-
-					return;
-				}
-			}
-
-			// remove previous connection
-			// this block creates a new connection regardless of the outcome
-			if (this.hitConnection) {
-				this.scene.removeConnection(this.hitConnection);
-
-				// let action = new RemoveConnectionAction(
-				// 	this.scene,
-				// 	this.hitConnection
-				// );
-				// UndoStack.current.push(action);
-
-				movedCons.push(this.hitConnection);
-				actions.push(ConnectionSwitchAction.Remove);
-
-				this.hitConnection = null;
-			}
-
-			if (
-				closeSock &&
-				closeSock != this.hitSocket &&
-				closeSock.socketType != this.hitSocket.socketType &&
-				closeSock.node != this.hitSocket.node
-			) {
-				// close socket
-				const con: ConnectionGraphicsItem = new ConnectionGraphicsItem();
-				// out socket should be on the left, socketA
-				if (this.hitSocket.socketType == SocketType.Out) {
-					// out socket
-					con.socketA = this.hitSocket;
-					con.socketB = closeSock;
-
-					// close sock is an inSocket which means it should only have one connection
-					// remove current connection from inSocket
-					if (closeSock.hasConnections()) {
-						const removeCon = closeSock.getConnection(0);
-						this.scene.removeConnection(removeCon);
-						movedCons.push(removeCon);
-						actions.push(ConnectionSwitchAction.Remove);
-
-						// let action = new RemoveConnectionAction(
-						// 	this.scene,
-						// 	removeCon
-						// );
-						// UndoStack.current.push(action);
-					}
-				} else {
-					// in socket
-					con.socketA = closeSock;
-					con.socketB = this.hitSocket;
-				}
-
-				// link connection
-				//con.socketA.con = con;
-				//con.socketB.con = con;
-
-				this.scene.addConnection(con);
-				movedCons.push(con);
-				actions.push(ConnectionSwitchAction.Add);
-
-				// let action = new AddConnectionAction(this.scene, con);
-				// UndoStack.current.push(action);
-			} else if (!closeSock) {
-				// delete connection if hit node is an insock
-				// if we're here it means one of 2 things:
-				// 1: a new connection failed to form
-				// 2: we're breaking a previously formed connection, which can only be done
-				// by dragging from an insock that already has a connection
-
-				if (this.hitSocket.socketType == SocketType.Out) {
-					/*
-			                if (this.hitSocket.hasConnections()) {
-			                    // remove connection
-			                    //let con = this.hitSocket.con;
-			                    this.removeConnection(this.hitSocket.getConnectionFrom(this.hitSocket));
-			                }
-			                */
-
-					if (this.hitConnection) {
-						this.scene.removeConnection(this.hitConnection);
-
-						movedCons.push(this.hitConnection);
-						actions.push(ConnectionSwitchAction.Remove);
-						// let action = new RemoveConnectionAction(
-						// 	this.scene,
-						// 	this.hitConnection
-						// );
-						// UndoStack.current.push(action);
-					}
-				}
-			}
-		}
-
-		this.hit = false;
-		this.hitSocket = null;
-		this.hitConnection = null;
-
-		// undo-redo
-		const action = new SwitchConnectionAction(this.scene, movedCons, actions);
-		UndoStack.current.push(action);
-	}
-}
diff --git a/src/lib/scene/view.ts b/src/lib/scene/view.ts
deleted file mode 100644
index 7211d589..00000000
--- a/src/lib/scene/view.ts
+++ /dev/null
@@ -1,385 +0,0 @@
-// https://github.com/freegroup/draw2d/blob/master/src/Canvas.js
-
-//https://github.com/jgraph/mxgraph/blob/master/javascript/src/js/view/mxGraph.js#L7810
-
-// https://bitbucket.org/nclsbrwn/texturedesigner/src/master/src/Designer/scene.ts?mode=edit&spa=0&at=master&fileviewer=file-view-default
-
-// https://bitbucket.org/nclsbrwn/texturedesigner/src/master/
-
-// https://stackoverflow.com/questions/45528111/javascript-canvas-map-style-point-zooming/45528455#45528455
-
-// get local mouse position
-function _getMousePos(canvas, evt) {
-	const rect = canvas.getBoundingClientRect();
-	return new Vector2(evt.clientX - rect.left, evt.clientY - rect.top);
-}
-
-export class Vector2 {
-	x: number;
-	y: number;
-
-	constructor(x: number, y: number) {
-		this.x = x;
-		this.y = y;
-	}
-
-	clone(): Vector2 {
-		return new Vector2(this.x, this.y);
-	}
-
-	static add(a: Vector2, b: Vector2): Vector2 {
-		return new Vector2(a.x + b.x, a.y + b.y);
-	}
-
-	static subtract(a: Vector2, b: Vector2): Vector2 {
-		return new Vector2(a.x - b.x, a.y - b.y);
-	}
-}
-
-export class Rect {
-	public x = 0;
-	public y = 0;
-	public width: number;
-	public height: number;
-
-	color: string;
-
-	public constructor() {
-		//this.scene = scene;
-		//scene.addItem(this);
-		this.width = 1;
-		this.height = 1;
-		this.color = "rgb(255, 50, 50)";
-	}
-
-	public setSize(w: number, h: number) {
-		this.width = w;
-		this.height = h;
-	}
-
-	public isPointInside(px: number, py: number): boolean {
-		if (
-			px >= this.x &&
-			px <= this.x + this.width &&
-			py >= this.y &&
-			py <= this.y + this.height
-		)
-			return true;
-		return false;
-	}
-
-	public setCenter(x: number, y: number) {
-		this.x = x - this.width / 2;
-		this.y = y - this.height / 2;
-	}
-
-	public centerX(): number {
-		return this.x + this.width / 2;
-	}
-
-	public centerY(): number {
-		return this.y + this.height / 2;
-	}
-
-	public move(dx: number, dy: number) {
-		this.x += dx;
-		this.y += dy;
-	}
-
-	public get left() {
-		return this.x;
-	}
-
-	public get top() {
-		return this.y;
-	}
-
-	public get right() {
-		return this.x + this.width;
-	}
-
-	public get bottom() {
-		return this.y + this.height;
-	}
-
-	public get center() {
-		return new Vector2(this.centerX(), this.centerY());
-	}
-
-	public intersects(other: Rect) {
-		if (this.left > other.right) return false;
-		if (this.right < other.left) return false;
-		if (this.bottom < other.top) return false;
-		if (this.top > other.bottom) return false;
-
-		return true;
-	}
-
-	public expand(uniformSize: number) {
-		const halfSize = uniformSize * 0.5;
-
-		// assume it's a rect with a positive area
-		this.x -= halfSize;
-		this.y -= halfSize;
-		this.width += halfSize * 2;
-		this.height += halfSize * 2;
-	}
-
-	public expandByRect(rect: Rect) {
-		// assume it's a rect with a positive area
-		this.x = Math.min(this.x, rect.x);
-		this.y = Math.min(this.y, rect.y);
-		this.width = Math.max(this.width, rect.width);
-		this.height = Math.max(this.height, rect.height);
-	}
-
-	clone(): Rect {
-		const rect = new Rect();
-		rect.x = this.x;
-		rect.y = this.y;
-		rect.width = this.width;
-		rect.height = this.height;
-
-		return rect;
-	}
-}
-
-/*
- This class handles panning and zooming of scene
- Tracks mouse movement, position and clicks
- Also converts from scene space to screen space and
- vice versa.
-*/
-export class SceneView {
-	canvas: HTMLCanvasElement;
-	context: CanvasRenderingContext2D;
-
-	// screen/canvas space
-	globalMousePos: Vector2;
-
-	mousePos: Vector2;
-	prevMousePos: Vector2;
-	mouseDownPos: Vector2; // pos of last mouse down
-	mouseDragDiff: Vector2; // mouse drag diff
-
-	zoomFactor: number;
-	offset: Vector2;
-
-	panning: boolean;
-	panStart: SVGPoint;
-
-	constructor(canvas: HTMLCanvasElement) {
-		this.canvas = canvas;
-		this.context = this.canvas.getContext("2d");
-
-		const self = this;
-		canvas.addEventListener("mousemove", function(evt: MouseEvent) {
-			self.onMouseMove(evt);
-		});
-		canvas.addEventListener("mousedown", function(evt: MouseEvent) {
-			self.onMouseDown(evt);
-		});
-		canvas.addEventListener("mouseup", function(evt: MouseEvent) {
-			self.onMouseUp(evt);
-		});
-		canvas.addEventListener("mouseout", function(evt: MouseEvent) {
-			self.onMouseOut(evt);
-		});
-		canvas.addEventListener("mousewheel", function(evt: WheelEvent) {
-			self.onMouseScroll(evt);
-		});
-		canvas.addEventListener("contextmenu", function(evt: MouseEvent) {
-			evt.preventDefault();
-		});
-
-		// todo: do document mouse move event callback too
-		document.addEventListener("mousemove", function(evt: MouseEvent) {
-			self.onGlobalMouseMove(evt);
-		});
-
-		this.zoomFactor = 1;
-		this.offset = new Vector2(0, 0);
-
-		this.mousePos = new Vector2(0, 0);
-		this.globalMousePos = new Vector2(0, 0);
-	}
-
-	getAbsPos() {
-		return new Vector2(this.canvas.offsetLeft, this.canvas.offsetTop);
-	}
-
-	isMouseOverCanvas() {
-		const rect = this.canvas.getBoundingClientRect();
-		//console.log(rect);
-		if (this.globalMousePos.x < rect.left) return false;
-		if (this.globalMousePos.y < rect.top) return false;
-		if (this.globalMousePos.x > rect.right) return false;
-		if (this.globalMousePos.y > rect.bottom) return false;
-
-		return true;
-	}
-
-	onMouseDown(evt: MouseEvent) {
-		if (evt.button == 1 || evt.button == 2) {
-			this.panning = true;
-
-			this.mouseDownPos = _getMousePos(this.canvas, evt);
-		}
-
-		this.mousePos = _getMousePos(this.canvas, evt);
-	}
-
-	onMouseUp(evt: MouseEvent) {
-		if (evt.button == 1 || evt.button == 2) {
-			this.panning = false;
-		}
-	}
-
-	onMouseMove(evt: MouseEvent) {
-		this.prevMousePos = this.mousePos;
-		this.mousePos = _getMousePos(this.canvas, evt);
-
-		if (this.panning) {
-			const prev = this.canvasToScene(this.prevMousePos);
-			const cur = this.canvasToScene(this.mousePos);
-			const diff = new Vector2(prev.x - cur.x, prev.y - cur.y);
-			this.mouseDragDiff = diff;
-
-			const factor = this.zoomFactor;
-			this.offset.x -= diff.x * factor;
-			this.offset.y -= diff.y * factor;
-		}
-	}
-
-	onGlobalMouseMove(evt: MouseEvent) {
-		this.globalMousePos = new Vector2(evt.pageX, evt.pageY);
-	}
-
-	onMouseScroll(evt: WheelEvent) {
-		// no panning while zooming
-		if (this.panning) return;
-
-		const pos = _getMousePos(this.canvas, evt);
-		const delta = (<any>evt).wheelDelta > 0 ? 1.1 : 1.0 / 1.1;
-
-		// offset from mouse pos
-		// find offset from previous zoom then move offset by that value
-
-		this.zoomFactor *= delta;
-		this.offset.x = pos.x - (pos.x - this.offset.x) * delta; // * (factor);
-		this.offset.y = pos.y - (pos.y - this.offset.y) * delta; // * (factor);
-
-		//this.zoom(pos.x, pos.y, delta);
-
-		evt.preventDefault();
-		return false;
-	}
-
-	onMouseOut(evt: MouseEvent) {
-		// cancel panning
-		this.panning = false;
-	}
-
-	get sceneCenter(): Vector2 {
-		return this.canvasToSceneXY(this.canvas.width / 2, this.canvas.height / 2);
-	}
-
-	zoom(x: number, y: number, level: number) {}
-
-	clear(context: CanvasRenderingContext2D, style = "rgb(50,50,50)") {
-		const ctx = context;
-
-		ctx.setTransform(1, 0, 0, 1, 0, 0);
-		//ctx.fillStyle = "rgb(50,50,50)";
-		ctx.fillStyle = style;
-		ctx.fillRect(0, 0, this.canvas.width, this.canvas.height);
-	}
-
-	setViewMatrix(context: CanvasRenderingContext2D) {
-		context.setTransform(
-			this.zoomFactor,
-			0,
-			0,
-			this.zoomFactor,
-			this.offset.x,
-			this.offset.y
-		);
-	}
-
-	drawGrid(
-		ctx: CanvasRenderingContext2D,
-		GRID_SIZE: number,
-		strokeStyle: string,
-		lineWidth: number
-	) {
-		// todo: convert line points to canvas space, reset context and draw them there to preserve line width
-
-		//const GRID_SIZE = 100;
-		const tl = this.canvasToSceneXY(0, 0);
-		const br = this.canvasToSceneXY(this.canvas.width, this.canvas.height);
-
-		//ctx.strokeStyle = "#4A5050";
-		//ctx.strokeStyle = "#464C4C";
-		ctx.strokeStyle = strokeStyle;
-		ctx.lineWidth = lineWidth;
-
-		// vertical
-		const vCount = (br.x - tl.x) / GRID_SIZE + 1.0;
-		const xStart = tl.x - (tl.x % GRID_SIZE);
-		for (let i = 0; i < vCount; i++) {
-			ctx.beginPath();
-			ctx.moveTo(xStart + i * GRID_SIZE, tl.y);
-			ctx.lineTo(xStart + i * GRID_SIZE, br.y);
-			ctx.stroke();
-		}
-
-		// horizontal
-		const hCount = (br.y - tl.y) / GRID_SIZE + 1.0;
-		const yStart = tl.y - (tl.y % GRID_SIZE);
-		for (let i = 0; i < hCount; i++) {
-			ctx.beginPath();
-			ctx.moveTo(tl.x, yStart + i * GRID_SIZE);
-			ctx.lineTo(br.x, yStart + i * GRID_SIZE);
-			ctx.stroke();
-		}
-	}
-
-	canvasToScene(pos: Vector2): Vector2 {
-		return new Vector2(
-			(pos.x - this.offset.x) * (1.0 / this.zoomFactor),
-			(pos.y - this.offset.y) * (1.0 / this.zoomFactor)
-		);
-	}
-
-	canvasToSceneXY(x: number, y: number): Vector2 {
-		return new Vector2(
-			(x - this.offset.x) * (1.0 / this.zoomFactor),
-			(y - this.offset.y) * (1.0 / this.zoomFactor)
-		);
-	}
-
-	globalToCanvasXY(x: number, y: number): Vector2 {
-		const rect = this.canvas.getBoundingClientRect();
-		return new Vector2(x - rect.left, y - rect.top);
-	}
-
-	getMouseSceneSpace(): Vector2 {
-		return this.canvasToScene(this.mousePos);
-	}
-
-	getMouseDeltaCanvasSpace(): Vector2 {
-		const prev = this.prevMousePos;
-		const cur = this.mousePos;
-		const diff = new Vector2(cur.x - prev.x, cur.y - prev.y);
-
-		return diff;
-	}
-
-	getMouseDeltaSceneSpace(): Vector2 {
-		const prev = this.canvasToScene(this.prevMousePos);
-		const cur = this.canvasToScene(this.mousePos);
-		const diff = new Vector2(cur.x - prev.x, cur.y - prev.y);
-
-		return diff;
-	}
-}
diff --git a/src/lib/undostack.ts b/src/lib/undostack.ts
deleted file mode 100644
index 4ae9fbc7..00000000
--- a/src/lib/undostack.ts
+++ /dev/null
@@ -1,88 +0,0 @@
-export class Action {
-	redo() {}
-
-	undo() {}
-}
-
-//  https://gist.github.com/dsamarin/3050311
-// https://github.com/agrinko/js-undo-manager
-// https://doc.qt.io/qt-5/qundostack.html#:~:text=An%20undo%20stack%20maintains%20a,createUndoAction()%20and%20createRedoAction().
-export class UndoStack {
-	static current: UndoStack;
-
-	stack: Action[];
-	pointer: number;
-
-	// this tracks the last clean state
-	savedState: number = -1;
-	cleanStatusChanged: (isClean: boolean) => void = null;
-
-	constructor() {
-		this.pointer = -1;
-		this.stack = [];
-	}
-
-	push(action: Action) {
-		let isClean = this.isClean();
-
-		this.pointer += 1;
-		this.stack.splice(this.pointer);
-
-		this.stack.push(action);
-
-		if (isClean != this.isClean() && this.cleanStatusChanged) {
-			this.cleanStatusChanged(this.isClean());
-		}
-	}
-
-	undo() {
-		if (this.pointer < 0) return;
-
-		let isClean = this.isClean();
-
-		const action = this.stack[this.pointer];
-		action.undo();
-
-		this.pointer -= 1;
-
-		if (isClean != this.isClean() && this.cleanStatusChanged) {
-			this.cleanStatusChanged(this.isClean());
-		}
-	}
-
-	redo() {
-		if (this.pointer >= this.stack.length - 1) return;
-
-		let isClean = this.isClean();
-
-		this.pointer += 1;
-
-		const action = this.stack[this.pointer];
-		action.redo();
-
-		if (isClean != this.isClean() && this.cleanStatusChanged) {
-			this.cleanStatusChanged(this.isClean());
-		}
-	}
-
-	clear() {
-		let isClean = this.isClean();
-
-		this.pointer = -1;
-		this.savedState = -1;
-		this.stack = [];
-
-		if (!isClean) {
-			this.cleanStatusChanged(true);
-		}
-	}
-
-	setClean() {
-		this.savedState = this.pointer;
-		this.cleanStatusChanged(true);
-	}
-
-	isClean() {
-		return this.savedState == this.pointer;
-	}
-}
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
deleted file mode 100644
index 0b7899f9..00000000
--- a/src/lib/utils.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export class Guid {
-	static newGuid() {
-		return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(c) {
-			const r = (Math.random() * 16) | 0,
-				v = c == "x" ? r : (r & 0x3) | 0x8;
-			return v.toString(16);
-		});
-	}
-}
diff --git a/src/lib/view3d.ts b/src/lib/view3d.ts
deleted file mode 100644
index bee4522d..00000000
--- a/src/lib/view3d.ts
+++ /dev/null
@@ -1,513 +0,0 @@
-import * as THREE from "three";
-import { OBJLoader } from "three/examples/jsm/loaders/OBJLoader";
-import { RGBELoader } from "three/examples/jsm/loaders/RGBELoader";
-import { GLTFLoader } from "three/examples/jsm/loaders/GLTFLoader.js";
-import { FBXLoader } from "three/examples/jsm/loaders/FBXLoader.js";
-import { OrbitControls } from "three-orbitcontrols-ts";
-import { DesignerNode } from "./designer/designernode";
-import { ImageCanvas } from "./designer/imagecanvas";
-import { SphereGeometry } from "./geometry/sphere";
-import { CylinderGeometry } from "./geometry/cylinder";
-import { PlaneGeometry } from "./geometry/plane";
-import path from "path";
-import { DataTexture } from "three";
-
-// https://www.bostonbiomotion.com/
-// https://blog.subvertallmedia.com/2018/06/25/three-js-imports.html
-// https://areknawo.com/building-3d-2048-game-with-vue-and-three-js-setup/
-// https://github.com/nicolaspanel/three-orbitcontrols-ts/issues/1
-// https://github.com/nicolaspanel/three-orbitcontrols-ts/issues/7
-// "three-orbitcontrols-ts": "git+https://git@github.com/nicolaspanel/three-orbitcontrols-ts.git",
-// https://stackoverflow.com/questions/16334505/how-to-load-obj-model-with-three-js-in-typescript?rq=1
-
-// PMREM Generation
-// https://github.com/mrdoob/three.js/pull/7902
-// https://discourse.threejs.org/t/are-there-any-guides-for-hdr-setups-for-novices/3932/2
-// examples:
-// https://threejs.org/examples/?q=hdr#webgl_materials_envmaps_hdr
-// https://github.com/mrdoob/three.js/blob/master/examples/webgl_materials_envmaps_hdr.html
-
-export class View3D {
-	private camera!: THREE.PerspectiveCamera;
-	private renderer!: THREE.WebGLRenderer;
-	private scene: THREE.Scene = new THREE.Scene();
-	private material: THREE.MeshStandardMaterial = new THREE.MeshStandardMaterial(
-		{
-			//color: 0x3F51B5,
-			color: 0xffffff,
-			roughness: 0.5,
-			metalness: 0.0,
-			transparent: true,
-			// alphaTest: 0,
-			// depthFunc: THREE.AlwaysDepth,
-			side: THREE.FrontSide,
-			blending: THREE.NormalBlending
-		}
-	);
-	private cubeMap: THREE.CubeTexture;
-	private skyPath: string = "assets/env/wide_street_01_1k.hdr";
-
-	private model: THREE.Object3D;
-	private controls: OrbitControls;
-	// texture repeat
-	private repeat = 1;
-
-	// geometry
-	private sphereGeom = new SphereGeometry(0.7, 128, 128);
-	private cubeGeom = new THREE.BoxGeometry();
-	private planeGeom = new PlaneGeometry(2, 2, 100, 100);
-	private cylinderGeom = new CylinderGeometry(0.5, 0.5, 1, 64, 64, true);
-
-	setSkyPath(path: string) {
-		this.skyPath = path;
-		this.loadEnvEquirect();
-	}
-
-	setCanvas(el: HTMLCanvasElement) {
-		this.setupRenderer(el);
-		this.camera = new THREE.PerspectiveCamera(
-			45,
-			el.width / el.height,
-			0.1,
-			1000
-		);
-		this.camera.position.z = 2.6;
-		this.camera.position.y = 1;
-		this.camera.position.x = 1;
-
-		this.setupOrbitControls(el);
-		this.setupLighting();
-		// this.cubeMap = this.loadEnv();
-		// this.material.envMap = this.cubeMap;
-		this.loadEnvEquirect();
-
-		//const geometry = new THREE.SphereGeometry(1, 64, 64);
-		this.model = new THREE.Mesh(this.sphereGeom, this.material);
-
-		// let loader = new THREE.ObjectLoader();
-		// loader.load("app://./")
-
-		this.scene.add(this.model);
-
-		const animate = () => {
-			requestAnimationFrame(animate);
-			this.controls.update();
-			this.renderer.render(this.scene, this.camera);
-		};
-
-		animate();
-	}
-
-	setupRenderer(el: HTMLCanvasElement) {
-		const renderer = new THREE.WebGLRenderer({
-			alpha: true,
-			canvas: el,
-			preserveDrawingBuffer: true,
-			antialias: true
-		});
-		renderer.setClearColor(0x000000, 0);
-		renderer.physicallyCorrectLights = true;
-		// renderer.gammaInput = false;
-		// renderer.gammaOutput = true;
-		renderer.gammaFactor = 2.2;
-		renderer.outputEncoding = THREE.GammaEncoding;
-		renderer.shadowMap.enabled = true;
-		renderer.shadowMap.type = THREE.PCFSoftShadowMap;
-		renderer.setSize(el.width, el.height);
-
-		renderer.toneMapping = THREE.ACESFilmicToneMapping;
-
-		this.renderer = renderer;
-	}
-
-	setupLighting() {
-		const container = new THREE.Object3D();
-
-		const brightness = 2;
-
-		let object3d = new THREE.DirectionalLight("white", 0.225 * brightness);
-		object3d.position.set(2.6, 1, 3);
-		object3d.name = "Back light";
-		container.add(object3d);
-
-		object3d = new THREE.DirectionalLight("white", 0.375 * brightness);
-		object3d.position.set(-2, -1, 0);
-		object3d.name = "Key light";
-		container.add(object3d);
-
-		object3d = new THREE.DirectionalLight("white", 0.75 * brightness);
-		object3d.position.set(3, 3, 2);
-		object3d.name = "Fill light";
-		container.add(object3d);
-
-		// this.scene.add(container);
-	}
-
-	setupOrbitControls(el: HTMLElement) {
-		const controls = new OrbitControls(this.camera, el);
-
-		controls.enableZoom = true;
-		controls.enableRotate = true;
-
-		//controls.autoRotate = true;
-		controls.enablePan = true;
-		controls.keyPanSpeed = 7.0;
-		controls.enableKeys = true;
-		controls.target = new THREE.Vector3(0, 0, 0);
-		controls.mouseButtons.PAN = null;
-		controls.keys = {
-			LEFT: 0,
-			UP: 0,
-			RIGHT: 0,
-			BOTTOM: 0
-		};
-
-		this.controls = controls;
-	}
-
-	loadEnvironment(basePath: string) {}
-
-	resize(width: number, height: number) {
-		this.camera.aspect = width / height;
-		this.camera.updateProjectionMatrix();
-		this.renderer.setSize(width, height);
-	}
-	private _init() {}
-
-	setTexture(imageCanvas: ImageCanvas, channelName: string) {
-		if (channelName == "albedo")
-			this.setAlbedoTexture(imageCanvas, channelName);
-		if (channelName == "normal")
-			this.setNormalTexture(imageCanvas, channelName);
-		if (channelName == "metalness")
-			this.setMetalnessTexture(imageCanvas, channelName);
-		if (channelName == "roughness")
-			this.setRoughnessTexture(imageCanvas, channelName);
-		if (channelName == "height")
-			this.setHeightTexture(imageCanvas, channelName);
-		if (channelName == "emission")
-			this.setEmissionTexture(imageCanvas, channelName);
-		if (channelName == "ao") this.setAoTexture(imageCanvas, channelName);
-		if (channelName == "alpha") this.setAlphaTexture(imageCanvas, channelName);
-	}
-
-	clearTexture(channelName: string) {
-		if (channelName == "albedo") {
-			this.material.map = null;
-		}
-		if (channelName == "normal") {
-			this.material.normalMap = null;
-		}
-		if (channelName == "metalness") {
-			this.material.metalnessMap = null;
-			this.material.metalness = 0;
-		}
-		if (channelName == "roughness") {
-			this.material.roughnessMap = null;
-			this.material.roughness = 0.5;
-		}
-		if (channelName == "height") {
-			this.material.displacementMap = null;
-		}
-		if (channelName == "emission") {
-			this.material.emissiveMap = null;
-		}
-		if (channelName == "ao") {
-			this.material.aoMap = null;
-		}
-		if (channelName == "alpha") {
-			this.material.alphaMap = null;
-		}
-		this.material.needsUpdate = true;
-	}
-
-	updateTexture(channelName: string) {
-		if (channelName == "albedo" && this.material.map != null) {
-			this.material.map.needsUpdate = true;
-		}
-		if (channelName == "normal" && this.material.normalMap != null) {
-			this.material.normalMap.needsUpdate = true;
-		}
-		if (channelName == "metalness" && this.material.metalnessMap != null) {
-			this.material.metalnessMap.needsUpdate = true;
-		}
-		if (channelName == "roughness" && this.material.roughnessMap != null) {
-			this.material.roughnessMap.needsUpdate = true;
-		}
-		if (channelName == "height" && this.material.displacementMap != null) {
-			this.material.displacementMap.needsUpdate = true;
-		}
-		if (channelName == "emission" && this.material.emissiveMap != null) {
-			this.material.emissiveMap.needsUpdate = true;
-		}
-		if (channelName == "ao" && this.material.aoMap != null) {
-			this.material.aoMap.needsUpdate = true;
-		}
-		if (channelName == "alpha" && this.material.alphaMap != null) {
-			this.material.alphaMap.needsUpdate = true;
-		}
-		this.material.needsUpdate = true;
-	}
-
-	setAlbedoTexture(imageCanvas: ImageCanvas, channelName: string) {
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-		tex.encoding = THREE.GammaEncoding;
-
-		tex.needsUpdate = true;
-		this.material.map = tex;
-		this.material.needsUpdate = true;
-	}
-
-	setNormalTexture(imageCanvas: ImageCanvas, channelName: string) {
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-
-		tex.needsUpdate = true;
-		this.material.normalMap = tex;
-		this.material.needsUpdate = true;
-	}
-
-	setMetalnessTexture(imageCanvas: ImageCanvas, channelName: string) {
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-
-		tex.needsUpdate = true;
-		this.material.metalnessMap = tex;
-		this.material.metalness = 1.0;
-		this.material.needsUpdate = true;
-	}
-
-	setRoughnessTexture(imageCanvas: ImageCanvas, channelName: string) {
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-
-		tex.needsUpdate = true;
-		this.material.roughnessMap = tex;
-		this.material.roughness = 1.0;
-		this.material.needsUpdate = true;
-	}
-
-	setHeightTexture(imageCanvas: ImageCanvas, channelName: string) {
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-
-		tex.needsUpdate = true;
-		this.material.displacementMap = tex;
-		this.material.displacementScale = 0.1;
-		this.material.needsUpdate = true;
-	}
-
-	setEmissionTexture(imageCanvas: ImageCanvas, channelName: string) {
-		console.log("setting emission texture");
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-		tex.encoding = THREE.GammaEncoding;
-
-		tex.needsUpdate = true;
-		this.material.emissiveMap = tex;
-		this.material.emissive = new THREE.Color(1, 1, 1);
-		this.material.needsUpdate = true;
-	}
-
-	setAoTexture(imageCanvas: ImageCanvas, channelName: string) {
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-
-		tex.needsUpdate = true;
-		this.material.aoMap = tex;
-		this.material.needsUpdate = true;
-	}
-
-	setAlphaTexture(imageCanvas: ImageCanvas, channelName: string) {
-		const tex = new THREE.CanvasTexture(imageCanvas.canvas);
-		tex.wrapS = tex.wrapT = THREE.RepeatWrapping;
-		tex.repeat.set(this.repeat, this.repeat);
-		tex.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
-
-		tex.needsUpdate = true;
-		this.material.alphaMap = tex;
-		this.material.needsUpdate = true;
-	}
-
-	setRepeat(repeat: number) {
-		this.repeat = repeat;
-
-		const mat = this.material;
-		if (mat.map) {
-			mat.map.repeat.set(repeat, repeat);
-			mat.map.needsUpdate = true;
-		}
-
-		if (mat.normalMap) {
-			mat.normalMap.repeat.set(repeat, repeat);
-			mat.normalMap.needsUpdate = true;
-		}
-
-		if (mat.metalnessMap) {
-			mat.metalnessMap.repeat.set(repeat, repeat);
-			mat.metalnessMap.needsUpdate = true;
-		}
-
-		if (mat.roughnessMap) {
-			mat.roughnessMap.repeat.set(repeat, repeat);
-			mat.roughnessMap.needsUpdate = true;
-		}
-
-		if (mat.displacementMap) {
-			mat.displacementMap.repeat.set(repeat, repeat);
-			mat.displacementMap.needsUpdate = true;
-		}
-
-		if (mat.alphaMap) {
-			mat.alphaMap.repeat.set(repeat, repeat);
-			mat.alphaMap.needsUpdate = true;
-		}
-
-		if (mat.emissiveMap) {
-			mat.emissiveMap.repeat.set(repeat, repeat);
-			mat.emissiveMap.needsUpdate = true;
-		}
-
-		if (mat.aoMap) {
-			mat.aoMap.repeat.set(repeat, repeat);
-			mat.aoMap.needsUpdate = true;
-		}
-	}
-
-	setModel(modelName: string) {
-		if (this.model) this.scene.remove(this.model);
-
-		let geom: THREE.Geometry;
-		if (modelName == "sphere") geom = this.sphereGeom;
-		if (modelName == "cube") geom = this.cubeGeom;
-		if (modelName == "plane") geom = this.planeGeom;
-		if (modelName == "cylinder") geom = this.cylinderGeom;
-		// crash if none is valid
-
-		this.model = new THREE.Mesh(geom, this.material);
-		this.scene.add(this.model);
-	}
-
-	loadModel(modelPath: string) {
-		const ext = modelPath
-			.split(".")
-			.pop()
-			.toLocaleLowerCase();
-
-		let loader = null;
-		if (ext === "obj") loader = new OBJLoader();
-		else if (ext === "fbx") loader = new FBXLoader();
-		else return;
-
-		loader.load(modelPath, group => {
-			if (this.model) this.scene.remove(this.model);
-
-			// assign material to all children
-			// for (let child of group.children)
-			// 	if (child instanceof THREE.Mesh)
-			// 		(child as THREE.Mesh).material = this.material;
-
-			group.traverse(obj => {
-				if (obj instanceof THREE.Mesh)
-					(obj as THREE.Mesh).material = this.material;
-			});
-
-			this.model = group;
-			this.scene.add(this.model);
-		});
-	}
-
-	reset() {
-		// clear all textures
-		// reset camera position
-		this.material = new THREE.MeshStandardMaterial({
-			color: 0xffffff,
-			roughness: 0.5,
-			metalness: 0.0,
-			transparent: true,
-			// alphaTest: 0,
-			// depthFunc: THREE.AlwaysDepth,
-			side: THREE.FrontSide,
-			blending: THREE.NormalBlending
-		});
-
-		// this.material.envMap = this.cubeMap;
-		this.loadEnvEquirect();
-
-		(this.model as THREE.Mesh).material = this.material;
-	}
-
-	setToneMappingExposure(exposure: number) {
-		this.renderer.toneMappingExposure = exposure;
-	}
-
-	loadEnv() {
-		//var path = '/images/cube/Bridge2/';
-		const basePath =
-			(process.env.NODE_ENV == "production" ? "file://" : "") +
-			path.join(process.env.BASE_URL, "assets/env/SwedishRoyalCastle/");
-		const format = ".jpg";
-		const envMap = new THREE.CubeTextureLoader().load([
-			basePath + "posx" + format,
-			basePath + "negx" + format,
-			basePath + "posy" + format,
-			basePath + "negy" + format,
-			basePath + "posz" + format,
-			basePath + "negz" + format
-		]);
-
-		return envMap;
-	}
-
-	// load equirect
-
-	loadEnvEquirect() {
-		const skyPath = this.skyPath;
-
-		const hdrPath =
-			(process.env.NODE_ENV == "production" ? "file://" : "") +
-			path.join(
-				process.env.BASE_URL,
-				// "assets/env/wide_street_01_1k.hdr"
-				// "assets/env/christmas/christmas_photo_studio_01_1k.hdr"
-				skyPath
-			);
-
-		new RGBELoader()
-			.setDataType(THREE.UnsignedByteType)
-			.load(hdrPath, (texture: DataTexture) => {
-				// skyPath could have changed between setting the texture and it
-				// actually loading, this check is there for that
-				if (skyPath !== this.skyPath) return;
-
-				const pmremGenerator = new THREE.PMREMGenerator(this.renderer);
-				pmremGenerator.compileEquirectangularShader();
-
-				const evtRT = pmremGenerator.fromEquirectangular(texture);
-				const tex = evtRT.texture;
-				tex.minFilter = THREE.LinearFilter;
-				tex.magFilter = THREE.LinearFilter;
-				// tex.needsUpdate = true;
-
-				this.material.envMap = evtRT.texture;
-				this.material.needsUpdate = true;
-
-				this.scene.background = evtRT.texture;
-			});
-	}
-}
diff --git a/src/main.ts b/src/main.ts
deleted file mode 100644
index e59833ac..00000000
--- a/src/main.ts
+++ /dev/null
@@ -1,55 +0,0 @@
-import Vue from "vue";
-import vgl from "vue-golden-layout";
-//import vgl from "vue-golden-layout/src";
-import "golden-layout/src/css/goldenlayout-dark-theme.css";
-import "../public/css/scrollbar.css";
-import "./utils/inspectelement";
-import "boxicons/css/boxicons.css";
-require("typeface-open-sans");
-import * as Sentry from "@sentry/electron";
-
-// toast
-import VueToast from "vue-toast-notification";
-//import 'vue-toast-notification/dist/theme-default.css';
-import "vue-toast-notification/dist/theme-sugar.css";
-
-// https://github.com/EmbeddedEnterprises/ng6-golden-layout/blob/master/README.md
-import * as $ from "jquery";
-(<any>window).$ = $;
-(<any>window).JQuery = $;
-
-// todo: fix later
-// https://docs.sentry.io/platforms/javascript/guides/electron/
-// if (process.env.VUE_APP_SENTRY_DNS) {
-// 	Sentry.init({ dsn: process.env.VUE_APP_SENTRY_DNS });
-// }
-
-import App from "./App.vue";
-import router from "./router";
-import store from "./store";
-import VfmPlugin from "vue-final-modal";
-
-Vue.config.productionTip = false;
-Vue.use(vgl);
-Vue.use(VueToast);
-Vue.use(VfmPlugin);
-
-import { Titlebar, Color } from "custom-electron-titlebar";
-const titleBar = new Titlebar({
-	backgroundColor: Color.fromHex("#333333"),
-	icon: "./icon.png",
-	shadow: true
-});
-
-let app = new Vue({
-	router,
-	store,
-	render: h =>
-		h(App, {
-			props: {
-				titleBar: titleBar
-			}
-		})
-});
-
-app.$mount("#app");
diff --git a/src/menu.ts b/src/menu.ts
deleted file mode 100644
index 21a65d92..00000000
--- a/src/menu.ts
+++ /dev/null
@@ -1,297 +0,0 @@
-// https://www.tutorialspoint.com/electron/electron_menus.htm
-// https://programmer.help/blogs/use-electron-to-customize-menus.html
-// https://electronjs.org/docs/api/menu
-// https://alan.fyi/renderer-menu-functions-in-electron-vue/
-
-const { app, Menu, BrowserWindow } = require("electron");
-import settings from "electron-settings";
-import { Settings } from "./settings";
-
-export enum MenuCommands {
-	FileNew = "file_new",
-	FileOpen = "file_open",
-	FileOpenRecent = "file_open_recent",
-	FileSave = "file_save",
-	FileSaveAs = "file_saveas",
-	FileExit = "file_exit",
-
-	EditUndo = "edit_undo",
-	EditRedo = "edit_redo",
-	EditCut = "edit_cut",
-	EditCopy = "edit_copy",
-	EditPaste = "edit_paste",
-
-	ExportZip = "export_zip",
-	ExportUnity = "export_unity",
-	ExportUnityZip = "export_unity_zip",
-
-	ExamplesGoldLinesMarbleTiles = "samples_1",
-	ExamplesGrenade = "samples_2",
-	ExamplesScrews = "samples_3",
-	ExamplesWoodenPlanks = "samples_4",
-	StoneGrass = "samples_5",
-	Copper = "samples_6",
-	FoilGasket = "samples_7",
-	StylizedGrass = "samples_8",
-	Sand = "samples_9",
-	YellowTiles = "samples_10",
-
-	HelpTutorials = "help_tutorials",
-	HelpAbout = "help_about",
-	HelpSubmitBug = "help_submitbug",
-	HelpDocumentation = "help_docs"
-}
-
-export function setupMenu() {
-	//get recent files
-	let recentFiles = settings.getSync(Settings.RecentFiles);
-	if (!Array.isArray(recentFiles)) {
-		recentFiles = [];
-	}
-
-	let recentFilesMenu = [];
-	recentFiles.forEach(file => {
-		if (typeof file !== "string") return;
-
-		recentFilesMenu.push({
-			label: file,
-			click: (item, focusedWindow) => {
-				focusedWindow.webContents.send(MenuCommands.FileOpenRecent, file);
-			}
-		});
-	});
-
-	const template = [
-		{
-			label: "File",
-			submenu: [
-				{
-					label: "New",
-					accelerator: "CmdOrCtrl+N",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.FileNew);
-					}
-				},
-				{
-					label: "Open",
-					accelerator: "CmdOrCtrl+O",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.FileOpen);
-					}
-				},
-				{
-					label: "Open Recent",
-					submenu: recentFilesMenu
-				},
-				{
-					label: "Save",
-					accelerator: "CmdOrCtrl+S",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.FileSave);
-					}
-				},
-				{
-					label: "Save As..",
-					accelerator: "CmdOrCtrl+Shift+S",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.FileSaveAs);
-					}
-				},
-				{
-					label: "Exit",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.FileExit);
-					}
-				}
-			]
-		},
-		{
-			label: "Edit",
-			submenu: [
-				{
-					label: "Undo",
-					accelerator: "CmdOrCtrl+Z",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.EditUndo);
-					}
-				},
-				{
-					label: "Redo",
-					accelerator: "CmdOrCtrl+Shift+Z",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.EditRedo);
-					}
-				},
-				{
-					label: "Cut",
-					accelerator: "CmdOrCtrl+X",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.EditCut);
-					}
-				},
-				{
-					label: "Copy",
-					accelerator: "CmdOrCtrl+C",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.EditCopy);
-					}
-				},
-				{
-					label: "Paste",
-					accelerator: "CmdOrCtrl+V",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.EditPaste);
-					}
-				}
-			]
-		},
-		// {
-		// 	label: "Export",
-		// 	submenu: [
-		// 		{
-		// 			label: "Zip",
-		// 			click: (item, focusedWindow) => {
-		// 				focusedWindow.webContents.send(MenuCommands.ExportZip);
-		// 			}
-		// 		},
-		// 		{
-		// 			label: "Unity Material",
-		// 			click: (item, focusedWindow) => {
-		// 				focusedWindow.webContents.send(MenuCommands.ExportUnity);
-		// 			}
-		// 		},
-		// 		{
-		// 			label: "Unity (Zip)",
-		// 			click: (item, focusedWindow) => {
-		// 				focusedWindow.webContents.send(MenuCommands.ExportUnityZip);
-		// 			}
-		// 		}
-		// 	]
-		// },
-		{
-			label: "Examples",
-			submenu: [
-				{
-					label: "GoldLinedMarbleTiles",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(
-							MenuCommands.ExamplesGoldLinesMarbleTiles
-						);
-					}
-				},
-				{
-					label: "Stylized Grass",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.StylizedGrass);
-					}
-				},
-				{
-					label: "StoneGrass",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.StoneGrass);
-					}
-				},
-				{
-					label: "Sand",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.Sand);
-					}
-				},
-				{
-					label: "Foil Gasket",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.FoilGasket);
-					}
-				},
-				{
-					label: "Copper",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.Copper);
-					}
-				},
-				{
-					label: "Yellow Tiles",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.YellowTiles);
-					}
-				},
-				{
-					label: "Grenade",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.ExamplesGrenade);
-					}
-				},
-				{
-					label: "Screws",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.ExamplesScrews);
-					}
-				},
-				{
-					label: "WoodenPlanks",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.ExamplesWoodenPlanks);
-					}
-				}
-			]
-		},
-		{
-			label: "Help",
-			submenu: [
-				{
-					label: "Documentation",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.HelpDocumentation);
-					}
-				},
-				{
-					label: "About",
-					click: (item, focusedWindow) => {
-						focusedWindow.webContents.send(MenuCommands.HelpAbout);
-					}
-				}
-				// {
-				//   label: "Submit Bug"
-				// }
-			]
-		},
-		...(process.env.NODE_ENV !== "production"
-			? [
-					{
-						label: "Dev",
-						submenu: [
-							{ role: "reload" },
-							{
-								role: "forcereload",
-								click: function(item, focusedWindow) {
-									if (focusedWindow) {
-										// After overloading, refresh and close all secondary forms
-										if (focusedWindow.id === 1) {
-											BrowserWindow.getAllWindows().forEach(function(win) {
-												if (win.id > 1) {
-													win.close();
-												}
-											});
-										}
-										focusedWindow.reload();
-									}
-								}
-							},
-							{ role: "toggledevtools" },
-							{ type: "separator" },
-							{ role: "resetzoom" },
-							{ role: "zoomin" },
-							{ role: "zoomout" },
-							{ type: "separator" },
-							{ role: "togglefullscreen" }
-						]
-					}
-			  ]
-			: [])
-	];
-
-	//console.log(template);
-
-	const menu = Menu.buildFromTemplate(template as any);
-	Menu.setApplicationMenu(menu);
-}
diff --git a/src/nodegraph/CMakeLists.txt b/src/nodegraph/CMakeLists.txt
new file mode 100644
index 00000000..49b3249c
--- /dev/null
+++ b/src/nodegraph/CMakeLists.txt
@@ -0,0 +1,86 @@
+
+cmake_minimum_required(VERSION 3.5)
+
+
+find_package(QT NAMES Qt6 Qt5 COMPONENTS Core REQUIRED)
+find_package(Qt${QT_VERSION_MAJOR} 5.5 COMPONENTS Core Gui Widgets OpenGLWidgets REQUIRED)
+if (UNIX AND NOT APPLE)
+    include_directories(${Qt${QT_VERSION_MAJOR}Gui_PRIVATE_INCLUDE_DIRS})
+endif()
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(NODEGRAPH_SRCS
+    # main.cpp
+    nodegraph.cpp
+    graph/scene.cpp
+)
+set(NODEGRAPH_HEADERS
+    nodegraph.h
+    utils.h
+    graph/scene.h
+)
+
+# library
+add_library(nodegraph STATIC ${NODEGRAPH_SRCS} ${NODEGRAPH_HEADERS})
+target_link_libraries(nodegraph PRIVATE Qt${QT_VERSION_MAJOR}::Core 
+                                        Qt${QT_VERSION_MAJOR}::Gui 
+                                        Qt${QT_VERSION_MAJOR}::OpenGLWidgets 
+                                        Qt${QT_VERSION_MAJOR}::Widgets)
+
+
+set_target_properties(nodegraph PROPERTIES
+    AUTOMOC ON
+    AUTORCC ON
+    CXX_EXTENSIONS OFF
+    EXPORT_NAME "Nodegraph Library"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+)
+
+if(QT_VERSION_MAJOR STREQUAL "5")
+    set_target_properties(nodegraph PROPERTIES
+        CXX_STANDARD 14
+        CXX_STANDARD_REQUIRED ON)
+elseif(QT_VERSION_MAJOR STREQUAL "6")
+    set_target_properties(nodegraph PROPERTIES
+        CXX_STANDARD 17
+        CXX_STANDARD_REQUIRED ON)
+endif()
+
+# EXE for testing purposes
+add_executable(nodegraph_app
+            ${NODEGRAPH_HEADERS}
+            ${NODEGRAPH_SRCS}
+            main.cpp
+        )
+target_link_libraries(nodegraph_app PRIVATE Qt${QT_VERSION_MAJOR}::Core
+                                            Qt${QT_VERSION_MAJOR}::Gui
+                                            Qt${QT_VERSION_MAJOR}::OpenGLWidgets 
+                                            Qt${QT_VERSION_MAJOR}::Widgets)
+
+
+set_target_properties(nodegraph_app PROPERTIES
+    AUTOMOC ON
+    AUTORCC ON
+    CXX_EXTENSIONS OFF
+    EXPORT_NAME "Nodegraph App"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+)
+
+if(QT_VERSION_MAJOR STREQUAL "5")
+    set_target_properties(nodegraph_app PROPERTIES
+        CXX_STANDARD 14
+        CXX_STANDARD_REQUIRED ON)
+elseif(QT_VERSION_MAJOR STREQUAL "6")
+    set_target_properties(nodegraph_app PROPERTIES
+        CXX_STANDARD 17
+        CXX_STANDARD_REQUIRED ON)
+endif()
+
+# if(QT_VERSION_MAJOR EQUAL 6)
+#     qt_finalize_executable(qtapp)
+# endif()
\ No newline at end of file
diff --git a/src/nodegraph/graph/scene.cpp b/src/nodegraph/graph/scene.cpp
new file mode 100644
index 00000000..3e79701c
--- /dev/null
+++ b/src/nodegraph/graph/scene.cpp
@@ -0,0 +1,567 @@
+#include "scene.h"
+#include <QGraphicsDropShadowEffect>
+#include <QGraphicsSceneMouseEvent>
+#include <QGraphicsView>
+#include <QOpenGLContext>
+#include <QPaintEngine>
+#include <QPainter>
+#include <QStyleOptionGraphicsItem>
+#include <QTextBlockFormat>
+#include <QTextCursor>
+#include <QTextDocument>
+#include <QUuid>
+
+namespace nodegraph {
+
+Scene::Scene() : QGraphicsScene()
+{
+    this->id = QUuid::createUuid().toString(QUuid::WithoutBraces);
+}
+
+ScenePtr Scene::create() { return ScenePtr(new Scene()); }
+
+void Scene::addNode(NodePtr node)
+{
+    this->addItem(node.data());
+    nodes[node->id()] = node;
+}
+
+ConnectionPtr Scene::connectNodes(NodePtr leftNode, QString leftOutputName,
+                                  NodePtr rightNode, QString rightInputName)
+{
+    auto leftPort = leftNode->getOutPortByName(leftOutputName);
+    qDebug() << rightNode->getInPorts();
+    auto rightPort = rightNode->getInPortByName(rightInputName);
+
+    // create new connection item from ports
+    auto conn = new Connection();
+    conn->startPort = leftPort;
+    conn->endPort = rightPort;
+    conn->updatePosFromPorts();
+    conn->updatePathFromPositions();
+
+    ConnectionPtr connPtr(conn);
+
+    // also add them to the ports
+    leftPort->addConnection(connPtr);
+    rightPort->addConnection(connPtr);
+
+    this->addItem(conn);
+
+    return connPtr;
+}
+
+NodePtr Scene::getNodeById(QString id) { return nodes[id]; }
+
+void Scene::removeNode(NodePtr node)
+{
+    // gather connections
+    QList<ConnectionPtr> cons;
+    for (auto port : node->getInPorts()) {
+        cons.append(port->connections);
+    }
+
+    for (auto port : node->getOutPorts()) {
+        cons.append(port->connections);
+    }
+
+    // remove connections
+    for (auto con : cons) {
+        this->removeConnection(con);
+    }
+
+    // remove node
+    node->hide(); // fix display cache issue
+    this->removeItem(node.data());
+
+    // reshow here in case i forget when re-adding node for
+    // undo-redo
+    node->show();
+}
+
+void Scene::removeConnection(ConnectionPtr con)
+{
+    con->startPort->removeConnection(con);
+    con->endPort->removeConnection(con);
+
+    this->removeItem(con.data());
+}
+
+Scene::~Scene()
+{
+    // remove all items manually otherwise
+    // smart point destructor of some items
+    // will cause segfault when cleaning up
+    auto items = this->items();
+    for (auto item : items)
+        this->removeItem(item);
+}
+
+Node::Node()
+{
+    width = 100;
+    height = 100;
+    isHovered = false;
+
+    defaultBorderColor = QColor(0, 0, 0);
+    highlightBorderColor = QColor(0, 0, 0);
+    // highlightBorderColor = QColor(120, 120, 120);
+    selectedBorderColor = QColor(200, 200, 200);
+
+    setCacheMode(QGraphicsItem::NoCache);
+
+    setFlag(QGraphicsItem::ItemIsMovable, true);
+    setFlag(QGraphicsItem::ItemIsFocusable, true);
+    setFlag(QGraphicsItem::ItemIsSelectable, true);
+    setFlag(QGraphicsItem::ItemSendsScenePositionChanges, true);
+
+    setCursor(Qt::ClosedHandCursor);
+
+    text = new QGraphicsTextItem(this);
+    text->setFlag(QGraphicsItem::ItemIsFocusable, false);
+    text->setFlag(QGraphicsItem::ItemIsSelectable, false);
+
+    text->setPos(0, 0);
+    text->setTextWidth(100);
+    text->setDefaultTextColor(QColor(255, 255, 255));
+    text->setZValue(5);
+
+    // center title
+    setName("Title");
+
+    text->document()->setDocumentMargin(2);
+
+    QFont font = text->font();
+    font.setWeight(QFont::Bold);
+    font.setPixelSize(12);
+    text->setFont(font);
+
+    QGraphicsDropShadowEffect* effect = new QGraphicsDropShadowEffect;
+    effect->setBlurRadius(20);
+    effect->setXOffset(0);
+    effect->setYOffset(0);
+    effect->setColor(QColor(00, 00, 00, 70));
+    // setGraphicsEffect(effect); // forces node to raster remder
+    // maybe render to node behind this to get same effect
+
+    setAcceptHoverEvents(true);
+    // setAcceptDrops(true);
+}
+
+NodePtr Node::create() { return NodePtr(new Node()); }
+
+void Node::setName(QString name)
+{
+    this->name = name;
+    text->setPlainText(name);
+
+    QTextBlockFormat format;
+    format.setAlignment(Qt::AlignCenter);
+    QTextCursor cursor = text->textCursor();
+    cursor.select(QTextCursor::Document);
+    cursor.mergeBlockFormat(format);
+    cursor.clearSelection();
+    text->setTextCursor(cursor);
+}
+
+void Node::setThumbnail(const QPixmap& pixmap)
+{
+    this->thumbnail = pixmap;
+    this->update();
+}
+
+const QVector<PortPtr> Node::getInPorts() const { return inPorts; }
+
+const QVector<PortPtr> Node::getOutPorts() const { return outPorts; }
+
+void Node::addInPort(QString name)
+{
+    PortPtr port(new Port(this));
+    port->name = name;
+    port->portType = PortType::In;
+    port->node = this->sharedFromThis();
+    inPorts.append(port);
+
+    // top and bottom padding for sockets
+    const int pad = inPorts.count() < 5 ? 10 : 0;
+
+    // sort in sockets
+    int incr = (this->height - pad * 2) / inPorts.count();
+    int mid = incr / 2.0;
+    int i = 0;
+    for (auto port : inPorts) {
+        int y = pad + i * incr + mid;
+        int x = 0;
+        port->setCenter(x, y);
+        i++;
+    }
+}
+
+void Node::addOutPort(QString name)
+{
+    PortPtr port(new Port(this));
+    port->name = name;
+    port->portType = PortType::Out;
+    port->node = this->sharedFromThis();
+    outPorts.append(port);
+
+    // top and bottom padding for sockets
+    const int pad = outPorts.count() < 5 ? 10 : 0;
+
+    // sort in sockets
+    int incr = (this->height - pad * 2) / outPorts.count();
+    int mid = incr / 2.0;
+    int i = 0;
+    for (auto port : outPorts) {
+        int y = pad + i * incr + mid;
+        int x = width;
+        port->setCenter(x, y);
+        i++;
+    }
+}
+
+PortPtr Node::getPortById(QString id)
+{
+    for (auto port : inPorts) {
+        if (port->id() == id)
+            return port;
+    }
+
+    for (auto port : outPorts) {
+        if (port->id() == id)
+            return port;
+    }
+
+    Q_ASSERT(false);
+}
+
+PortPtr Node::getInPortByName(QString name)
+{
+    for (auto port : inPorts) {
+        if (port->name == name)
+            return port;
+    }
+
+    Q_ASSERT(false);
+}
+
+PortPtr Node::getOutPortByName(QString name)
+{
+    for (auto port : outPorts) {
+        if (port->name == name)
+            return port;
+    }
+
+    Q_ASSERT(false);
+}
+
+QRectF Node::boundingRect() const { return QRectF(0, 0, 100, 100); }
+
+// void Node::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+// {
+//     QGraphicsObject::mouseMoveEvent(event);
+// }
+
+void Node::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
+{
+    // if (event->button() == Qt::LeftButton) {
+    //     emit selected(sharedFromThis());
+    // }
+
+    QGraphicsObject::mouseReleaseEvent(event);
+}
+
+void Node::hoverEnterEvent(QGraphicsSceneHoverEvent* event)
+{
+    this->text->hide();
+    this->isHovered = true;
+    QGraphicsObject::hoverEnterEvent(event);
+}
+
+void Node::hoverLeaveEvent(QGraphicsSceneHoverEvent* event)
+{
+    this->text->show();
+    this->isHovered = false;
+    QGraphicsObject::hoverLeaveEvent(event);
+}
+
+void Node::paint(QPainter* painter, QStyleOptionGraphicsItem const* option,
+                 QWidget* widget)
+{
+    const int titleHeight = 20;
+    const int nodeWidth = width;
+    const int nodeHeight = height;
+    const int titleRadius = 4;
+    const QColor titleColor(0, 0, 0);
+
+    // // https://doc.qt.io/qt-5/qpainter.html#beginNativePainting
+    // https://github.com/liff-engineer/WeeklyARTS/blob/d8605aa3bfb2641d2a13621262024a1edff7b661/2018_9_4/Mixin2D%263DinQt.md
+    auto type = painter->paintEngine()->type();
+    if (type != QPaintEngine::OpenGL && type != QPaintEngine::OpenGL2) {
+        qWarning() << "Paint engine needs to be OPENGL!";
+        // return;
+    }
+
+    auto rect = boundingRect();
+
+    QColor borderColor;
+    if (isSelected())
+        borderColor = this->selectedBorderColor;
+    else if (isHovered)
+        borderColor = this->highlightBorderColor;
+    else
+        borderColor = this->defaultBorderColor;
+
+    // not really needed
+    // painter->setClipRect(option->exposedRect);
+
+    // smooth rendering
+    // painter->setRenderHint(QPainter::Antialiasing);
+    // painter->setRenderHint(QPainter::TextAntialiasing);
+
+    // title tab
+    // QPainterPath titlePath;
+    // titlePath.setFillRule(Qt::WindingFill);
+    // titlePath.addRect(0, 10, width, titleHeight - 10);
+    // titlePath.addRoundedRect(0, 0, nodeWidth, titleHeight, titleRadius,
+    // titleRadius); painter->fillPath(titlePath, QBrush(QColor(255, 255,
+    // 255)));
+
+    // // draw text node seperator
+    // QPainterPath block;
+    // block.setFillRule(Qt::WindingFill);
+    // block.addRect(0, titleHeight, nodeWidth, 3);
+    // painter->fillPath(block, QBrush(QColor(30, 30, 30, 160)));
+
+    // QPen pen(QColor(00, 00, 00, 250), .5);
+    // QPen pen(borderColor, .5);
+    // painter->setPen(pen);
+
+    // background
+    QPainterPath bgPath;
+    bgPath.setFillRule(Qt::WindingFill);
+    bgPath.addRoundedRect(0, 0, nodeWidth, nodeHeight, titleRadius,
+                          titleRadius);
+    painter->fillPath(bgPath, QBrush(QColor(10, 10, 10, 255)));
+
+    if (!thumbnail.isNull()) {
+        painter->drawPixmap(QRect(0, 0, nodeWidth, nodeHeight), thumbnail);
+    }
+
+    // thumbnail as texture
+    if (texId != 0) {
+        // // https://doc.qt.io/qt-5/qpainter.html#beginNativePainting
+        painter->beginNativePainting();
+
+        // glColor4f(1.0f, 0.0f, 0.0f, 1.0);
+        glEnable(GL_TEXTURE_2D);
+
+        glActiveTexture(0);
+        glBindTexture(GL_TEXTURE_2D, texId);
+        glBegin(GL_QUADS);
+        glTexCoord2f(0, 0);
+        glVertex2f(0, 0);
+
+        glTexCoord2f(1, 0);
+        glVertex2f(100, 0);
+
+        glTexCoord2f(1, 1);
+        glVertex2f(100, 100);
+
+        glTexCoord2f(0, 1);
+        glVertex2f(0, 100);
+        glEnd();
+
+        painter->endNativePainting();
+    }
+
+    // draw highlight
+
+    // top bar for text
+    if (!isHovered) {
+        QPainterPath bgPath;
+        bgPath.setFillRule(Qt::WindingFill);
+        bgPath.addRoundedRect(0, 0, nodeWidth, 18, titleRadius, titleRadius);
+        painter->fillPath(bgPath, QBrush(QColor(0, 0, 0, 255)));
+
+        text->paint(painter, option, widget);
+    }
+
+    // draw border
+    painter->setPen(QPen(borderColor, 3));
+    painter->drawRoundedRect(rect, titleRadius, titleRadius);
+}
+
+Node::~Node()
+{
+    // remove ownership from scene else scene will try to
+    // clean it up after it's been deleted
+    if (this->scene())
+        this->scene()->removeItem(this);
+}
+
+QString Port::id() const { return _id; }
+
+Port::Port(QGraphicsObject* parent) : QGraphicsObject(parent)
+{
+    setCursor(Qt::ClosedHandCursor);
+
+    // this->setFlag(QGraphicsItem::ItemIsSelectable, false);
+    this->setFlag(QGraphicsItem::ItemSendsScenePositionChanges);
+
+    _radius = 7;
+    name = "";
+    portType = PortType::In;
+    _id = QUuid::createUuid().toString(QUuid::WithoutBraces);
+}
+
+QRectF Port::boundingRect() const
+{
+    // return QRectF(-_radius, -_radius, _radius * 2, _radius * 2);
+
+    // add extra space for hit testing
+    return QRectF(-_radius * 2, -_radius * 2, _radius * 4, _radius * 4);
+}
+
+QRectF Port::actualRect() const
+{
+    return QRectF(-_radius, -_radius, _radius * 2, _radius * 2);
+}
+
+void Port::setCenter(float x, float y)
+{
+    // auto rect = this->boundingRect();
+    // setPos(QPointF(x - rect.x() / 2, y - rect.y() / 2));
+    setPos(QPointF(x, y));
+}
+
+QVariant Port::itemChange(GraphicsItemChange change, const QVariant& value)
+{
+    if (change == ItemScenePositionHasChanged) {
+        for (auto con : connections) {
+            con->updatePosFromPorts();
+            con->updatePathFromPositions();
+        }
+    }
+    return value;
+}
+
+void Port::removeConnection(ConnectionPtr con)
+{
+    // todo: make sure this does what it's supposed to do
+    connections.removeOne(con);
+}
+
+void Port::paint(QPainter* painter, QStyleOptionGraphicsItem const* option,
+                 QWidget* widget)
+{
+    auto rect = actualRect();
+
+    QPen pen(QColor(00, 00, 00, 250), 1.0f);
+    painter->setPen(pen);
+
+    // background
+    QPainterPath bgPath;
+    bgPath.setFillRule(Qt::WindingFill);
+    // bgPath.addRoundedRect(-_radius, _radius, rect.width(), rect.height(),
+    // rect.width() / 2, rect.height() / 2);
+    bgPath.addRoundedRect(rect, _radius, _radius);
+    painter->fillPath(bgPath, QBrush(QColor(170, 170, 170, 255)));
+
+    // draw border
+    painter->setPen(QPen(QColor(0, 0, 0), 3));
+    painter->drawRoundedRect(rect, rect.width() / 2, rect.height() / 2);
+}
+
+Port::~Port()
+{
+    // remove ownership from scene else scene will try to
+    // clean it up after it's been deleted
+    if (this->scene())
+        this->scene()->removeItem(this);
+}
+
+Connection::Connection()
+{
+    pos1 = QPointF(0, 0);
+    pos2 = QPointF(0, 0);
+
+    connectState = ConnectionState::Complete;
+
+    auto pen = QPen(QColor(200, 200, 200));
+    pen.setBrush(QColor(50, 150, 250));
+    pen.setCapStyle(Qt::RoundCap);
+    pen.setWidth(lineThickness);
+    setPen(pen);
+}
+
+void Connection::updatePosFromPorts()
+{
+    pos1 = startPort->scenePos();
+    pos2 = endPort->scenePos();
+}
+
+void Connection::updatePathFromPositions()
+{
+    p = new QPainterPath;
+    p->moveTo(pos1);
+
+    qreal dx = pos2.x() - pos1.x();
+    qreal dy = pos2.y() - pos1.y();
+
+    QPointF ctr1(pos1.x() + dx * 0.5, pos1.y());
+    QPointF ctr2(pos2.x() - dx * 0.5, pos2.y());
+
+    p->cubicTo(ctr1, ctr2, pos2);
+    p->setFillRule(Qt::OddEvenFill);
+
+    setPath(*p);
+}
+
+void Connection::paint(QPainter* painter,
+                       const QStyleOptionGraphicsItem* option, QWidget* widget)
+{
+    painter->setRenderHint(QPainter::Antialiasing);
+    painter->save();
+
+    if (connectState == ConnectionState::Dragging) {
+        QPen pen(QColor(150, 150, 150), lineThickness);
+        pen.setStyle(Qt::DashLine);
+        pen.setDashOffset(4);
+        painter->setPen(pen);
+        painter->drawPath(*p);
+
+        painter->setPen(QPen(QColor(0, 0, 0), 3));
+        painter->setBrush(QBrush(QColor(150, 150, 150)));
+        painter->drawEllipse(pos1, 7, 7);
+
+        painter->setPen(Qt::NoPen);
+        painter->drawEllipse(pos2, 6, 6);
+    }
+    if (connectState == ConnectionState::Complete) {
+        // create gradient for line
+        QPen pen(QColor(170, 170, 170), lineThickness);
+        painter->setPen(pen);
+        painter->drawPath(*p);
+
+        painter->setPen(QPen(QColor(0, 0, 0), 3));
+        painter->setBrush(QBrush(QColor(170, 170, 170)));
+        painter->drawEllipse(pos1, 7, 7);
+        painter->drawEllipse(pos2, 7, 7);
+    }
+
+    painter->restore();
+
+    Q_UNUSED(option);
+    Q_UNUSED(widget);
+}
+
+Connection::~Connection()
+{
+    // remove ownership from scene else scene will try to
+    // clean it up after it's been deleted
+    if (this->scene())
+        this->scene()->removeItem(this);
+}
+
+} // namespace nodegraph
\ No newline at end of file
diff --git a/src/nodegraph/graph/scene.h b/src/nodegraph/graph/scene.h
new file mode 100644
index 00000000..6214e90a
--- /dev/null
+++ b/src/nodegraph/graph/scene.h
@@ -0,0 +1,214 @@
+#pragma once
+
+#include <QGraphicsObject>
+#include <QGraphicsPathItem>
+#include <QGraphicsScene>
+#include <QList>
+#include <QMap>
+#include <QOpenGLContext>
+#include <QPixmap>
+#include <QRectF>
+#include <QSharedPointer>
+#include <QVector>
+
+class QGraphicsTextItem;
+class QPainterPath;
+
+namespace nodegraph {
+
+class Node;
+class Port;
+class Connection;
+class Scene;
+
+typedef QSharedPointer<Node> NodePtr;
+typedef QSharedPointer<Connection> ConnectionPtr;
+typedef QSharedPointer<Port> PortPtr;
+typedef QSharedPointer<Scene> ScenePtr;
+
+enum class SceneItemType : int { Node = 1, Port = 2, Connection = 3 };
+
+class Scene : public QGraphicsScene, public QEnableSharedFromThis<Scene> {
+public:
+    QMap<QString, NodePtr> nodes;
+    QString id;
+
+    Scene();
+    static ScenePtr create();
+
+    void addNode(NodePtr node);
+    NodePtr getNodeById(QString id);
+
+    ConnectionPtr connectNodes(NodePtr leftNode, QString leftOutputName,
+                               NodePtr rightNode, QString rightInputName);
+
+    // this removes the node and associating connections
+    // and node from scene
+    void removeNode(NodePtr node);
+
+    // removes connection and item from scene
+    void removeConnection(ConnectionPtr con);
+
+    ~Scene();
+};
+
+class Node : public QGraphicsObject, public QEnableSharedFromThis<Node> {
+    QString _id;
+
+    int width;
+    int height;
+    GLuint texId = 0;
+
+    QGraphicsTextItem* text;
+    QString name;
+
+    QPixmap thumbnail;
+
+    bool isHovered;
+    // bool isSelected;
+
+    QColor defaultBorderColor;
+    QColor highlightBorderColor;
+    QColor selectedBorderColor;
+
+public:
+    QVector<PortPtr> inPorts;
+    QVector<PortPtr> outPorts;
+    explicit Node();
+    static NodePtr create();
+
+    const QString id() const { return _id; }
+    void setId(const QString& id) { _id = id; }
+
+    void setTextureId(GLuint id) { texId = id; }
+
+    const QVector<PortPtr> getInPorts() const;
+    const QVector<PortPtr> getOutPorts() const;
+
+    void setName(QString name);
+    void setThumbnail(const QPixmap& pixmap);
+
+    void addInPort(QString name);
+    void addOutPort(QString name);
+
+    PortPtr getPortById(QString id);
+
+    PortPtr getInPortByName(QString name);
+    PortPtr getOutPortByName(QString name);
+
+    QRectF boundingRect() const override;
+
+    bool hovered() const { return isHovered; };
+
+    virtual int type() const override { return (int)SceneItemType::Node; }
+    virtual ~Node();
+
+protected:
+    void paint(QPainter* painter, QStyleOptionGraphicsItem const* option,
+               QWidget* widget = 0) override;
+
+    // void
+    // mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+
+    // void
+    // mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;
+
+    void hoverEnterEvent(QGraphicsSceneHoverEvent* event) override;
+
+    void hoverLeaveEvent(QGraphicsSceneHoverEvent* event) override;
+
+    // void
+    // hoverMoveEvent(QGraphicsSceneHoverEvent *) override;
+
+    // void
+    // mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) override;
+
+    // signals:
+    //     void selected(const NodePtr& node);
+};
+
+enum class PortType : int { Invalid = 0, In = 1, Out = 2 };
+
+class Port : public QGraphicsObject, public QEnableSharedFromThis<Port> {
+    QGraphicsTextItem* text;
+    int _radius;
+    QString _id;
+
+public:
+    NodePtr node;
+    QVector<ConnectionPtr> connections;
+
+    PortType portType;
+    QString name;
+
+    QString id() const;
+    void setId(const QString& id) { _id = id; }
+
+    int radius() const { return _radius; }
+
+    void addConnection(ConnectionPtr con) { connections.append(con); }
+
+    void removeConnection(ConnectionPtr con);
+
+    Port(QGraphicsObject* parent);
+
+    QRectF boundingRect() const override;
+
+    QRectF actualRect() const;
+
+    void setCenter(float x, float y);
+
+    QVariant itemChange(GraphicsItemChange change, const QVariant& value);
+
+    virtual int type() const override { return (int)SceneItemType::Port; }
+    virtual ~Port();
+
+protected:
+    void paint(QPainter* painter, QStyleOptionGraphicsItem const* option,
+               QWidget* widget = 0) override;
+};
+
+enum class ConnectionState { Dragging, Complete };
+
+class Connection : public QGraphicsPathItem,
+                   public QEnableSharedFromThis<Connection> {
+    friend class Scene;
+
+    QString _id;
+
+public:
+    ConnectionState connectState;
+
+    PortPtr startPort;
+    PortPtr endPort;
+
+    QPointF pos1;
+    QPointF pos2;
+
+    double lineThickness = 4.0;
+
+    virtual int type() const override { return (int)SceneItemType::Connection; }
+
+public:
+    explicit Connection();
+
+    const QString id() const { return _id; }
+    void setId(const QString& id) { _id = id; }
+
+    void updatePositions();
+
+    void updatePosFromPorts();
+    void updatePathFromPositions();
+
+    QPainterPath* p;
+
+    // virtual int type() const override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option,
+               QWidget* widget) override;
+
+    virtual ~Connection();
+};
+
+} // namespace nodegraph
\ No newline at end of file
diff --git a/src/nodegraph/main.cpp b/src/nodegraph/main.cpp
new file mode 100644
index 00000000..32ae2815
--- /dev/null
+++ b/src/nodegraph/main.cpp
@@ -0,0 +1,54 @@
+#include "graph/scene.h"
+#include "nodegraph.h"
+#include <QApplication>
+#include <QMainWindow>
+#include <QStackedLayout>
+
+using namespace nodegraph;
+
+int main(int argc, char *argv[]) {
+  QApplication a(argc, argv);
+  QMainWindow w;
+
+  auto graph = new NodeGraph(&w);
+
+  // QStackedLayout *layout = new QStackedLayout(&w);
+  // layout->addWidget(graph);
+
+  w.setCentralWidget(graph);
+
+  auto scene = graph->scene();
+
+  NodePtr node(new Node());
+  node->setName("Warp");
+  node->addInPort("image");
+  node->addInPort("height");
+  node->addOutPort("image");
+  scene->addNode(node);
+
+  NodePtr outputNode(new Node());
+  outputNode->setName("Floodfill");
+  outputNode->addInPort("image");
+  outputNode->addOutPort("result");
+  outputNode->setPos(200, 150);
+  scene->addNode(outputNode);
+
+  scene->connectNodes(node, "image", outputNode, "image");
+
+  NodePtr node2(new Node());
+  node2->setName("Stress Test");
+  node2->addInPort("image");
+  node2->addInPort("image2");
+  node2->addInPort("image3");
+  node2->addInPort("image4");
+  node2->addOutPort("result");
+  node2->setPos(320, 0);
+  scene->addNode(node2);
+
+  w.resize(800, 600);
+
+  w.show();
+  w.showMaximized();
+
+  return a.exec();
+}
diff --git a/src/nodegraph/nodegraph.cpp b/src/nodegraph/nodegraph.cpp
new file mode 100644
index 00000000..c44ec910
--- /dev/null
+++ b/src/nodegraph/nodegraph.cpp
@@ -0,0 +1,511 @@
+#include <QtWidgets/QGraphicsScene>
+
+#include <QtGui/QBrush>
+#include <QtGui/QPen>
+#include <QtWidgets/QMenu>
+
+#include <QtCore/QPointF>
+#include <QtCore/QRectF>
+// #include <QtCore/QColor>
+
+// #include <QtOpenGL>
+#include <QOpenGLWidget>
+#include <QtWidgets>
+
+#include <QDebug>
+#include <cmath>
+#include <iostream>
+
+const QColor BackgroundColor(53, 53, 53);
+const QColor FineGridColor(60, 60, 60);
+const QColor CoarseGridColor(25, 25, 25);
+
+#include "graph/scene.h"
+#include "nodegraph.h"
+
+namespace nodegraph {
+
+MouseButtonStates::MouseButtonStates() { reset(); }
+
+void MouseButtonStates::reset()
+{
+    left = false;
+    middle = false;
+    right = false;
+}
+
+NodeGraph::NodeGraph(QWidget* parent) : QGraphicsView(parent)
+{
+    // https://doc.qt.io/qt-6.2/graphicsview.html#opengl-rendering
+    auto gl = new QOpenGLWidget();
+    QSurfaceFormat format;
+    format.setSamples(4);
+    gl->setFormat(format);
+    this->setViewport(gl);
+
+    setDragMode(QGraphicsView::RubberBandDrag);
+    setRenderHint(QPainter::Antialiasing);
+
+    // setBackgroundBrush(BackgroundColor);
+    setBackgroundBrush(QColor(53, 53, 53));
+
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
+
+    // setCacheMode(QGraphicsView::CacheBackground);
+    // setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
+    setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+
+    // setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
+
+    // auto scene = new QGraphicsScene();
+    // scene->addText("Hello World!");
+    // setScene(scene);
+
+    setAcceptDrops(true);
+
+    this->setNodeGraphScene(ScenePtr(new Scene()));
+    mbStates.reset();
+}
+
+void NodeGraph::setNodeGraphScene(const ScenePtr& scene)
+{
+    // properly cleanup old scene
+    if (!!this->_scene) {
+        this->setScene(nullptr);
+    }
+
+    this->_scene = scene;
+    this->setScene(scene.data());
+
+    // handle scene's events from within the view
+    scene->installEventFilter(this);
+
+    // connect to selection signal
+    connect(scene.data(), &QGraphicsScene::selectionChanged,
+            [=]() { this->handleSelectionChange(); });
+}
+
+void NodeGraph::wheelEvent(QWheelEvent* event)
+{
+    QPoint delta = event->angleDelta();
+
+    if (delta.y() == 0) {
+        event->ignore();
+        return;
+    }
+
+    double const d = delta.y() / std::abs(delta.y());
+
+    if (d > 0.0)
+        scaleUp();
+    else
+        scaleDown();
+}
+
+void NodeGraph::scaleUp()
+{
+    double const step = 1.2;
+    double const factor = std::pow(step, 1.0);
+
+    QTransform t = transform();
+
+    if (t.m11() > 2.0)
+        return;
+
+    scale(factor, factor);
+}
+
+void NodeGraph::scaleDown()
+{
+    double const step = 1.2;
+    double const factor = std::pow(step, -1.0);
+
+    scale(factor, factor);
+}
+
+void NodeGraph::keyPressEvent(QKeyEvent* event)
+{
+    if (event->key() == Qt::Key_Delete) {
+        // delete items!
+        auto items = this->_scene->selectedItems();
+        for (auto item : items) {
+            if (item->type() == (int)SceneItemType::Node) {
+                auto node = qgraphicsitem_cast<Node*>(item);
+                this->_scene->removeNode(node->sharedFromThis());
+            }
+        }
+
+        // package them and pass them to deletion signal
+    }
+
+    QGraphicsView::keyPressEvent(event);
+
+    this->invalidateScene(QRect(-1000, -1000, 1000, 1000));
+}
+
+void NodeGraph::keyReleaseEvent(QKeyEvent* event)
+{
+    switch (event->key()) {
+    case Qt::Key_Shift:
+        // setDragMode(QGraphicsView::ScrollHandDrag);
+        break;
+
+    default:
+        break;
+    }
+    QGraphicsView::keyReleaseEvent(event);
+}
+
+void NodeGraph::mousePressEvent(QMouseEvent* event)
+{
+    if (event->button() == Qt::MiddleButton &&
+        scene()->mouseGrabberItem() == nullptr) {
+        _clickPos = mapToScene(event->pos());
+        setDragMode(QGraphicsView::NoDrag);
+    }
+    QGraphicsView::mousePressEvent(event);
+}
+
+void NodeGraph::mouseMoveEvent(QMouseEvent* event)
+{
+
+    if (event->buttons() == Qt::MiddleButton) {
+        QPointF difference = _clickPos - mapToScene(event->pos());
+        setSceneRect(sceneRect().translated(difference.x(), difference.y()));
+    }
+    QGraphicsView::mouseMoveEvent(event);
+}
+
+void NodeGraph::mouseReleaseEvent(QMouseEvent* event)
+{
+    if (event->button() == Qt::MiddleButton) {
+        setDragMode(QGraphicsView::RubberBandDrag);
+    }
+    QGraphicsView::mouseReleaseEvent(event);
+}
+
+void NodeGraph::mouseDoubleClickEvent(QMouseEvent* event)
+{
+    if (event->button() == Qt::LeftButton) {
+
+        auto scenePos = this->mapToScene(event->pos());
+
+        // node: stripped const from returned node
+        auto node = (Node*)getNodeAtScenePos(scenePos.x(), scenePos.y());
+        if (node) {
+            emit nodeDoubleClicked(node->sharedFromThis());
+        }
+        else {
+            emit nodeDoubleClicked(nullptr);
+        }
+    }
+    QGraphicsView::mouseDoubleClickEvent(event);
+}
+
+void NodeGraph::drawBackground(QPainter* painter, const QRectF& r)
+{
+    auto type = painter->paintEngine()->type();
+    if (type != QPaintEngine::OpenGL && type != QPaintEngine::OpenGL2) {
+        qWarning() << "background paint engine needs to be OPENGL!";
+        // return;
+    }
+
+    QGraphicsView::drawBackground(painter, r);
+    painter->setRenderHint(QPainter::Antialiasing);
+
+    auto drawGrid = [&](double gridStep) {
+        QRect windowRect = rect();
+        QPointF tl = mapToScene(windowRect.topLeft());
+        QPointF br = mapToScene(windowRect.bottomRight());
+
+        double left = std::floor(tl.x() / gridStep - 0.5);
+        double right = std::floor(br.x() / gridStep + 1.0);
+        double bottom = std::floor(tl.y() / gridStep - 0.5);
+        double top = std::floor(br.y() / gridStep + 1.0);
+
+        // vertical lines
+        for (int xi = int(left); xi <= int(right); ++xi) {
+            QLineF line(xi * gridStep, bottom * gridStep, xi * gridStep,
+                        top * gridStep);
+
+            painter->drawLine(line);
+        }
+
+        // horizontal lines
+        for (int yi = int(bottom); yi <= int(top); ++yi) {
+            QLineF line(left * gridStep, yi * gridStep, right * gridStep,
+                        yi * gridStep);
+            painter->drawLine(line);
+        }
+    };
+
+    QBrush bBrush = backgroundBrush();
+
+    QPen pfine(FineGridColor, 1.0);
+
+    painter->setPen(pfine);
+    drawGrid(15);
+
+    QPen p(CoarseGridColor, 1.0);
+
+    painter->setPen(p);
+    drawGrid(150);
+}
+
+void NodeGraph::showEvent(QShowEvent* event)
+{
+    // _scene->setSceneRect(this->rect());
+    QGraphicsView::showEvent(event);
+}
+
+bool NodeGraph::eventFilter(QObject* o, QEvent* e)
+{
+    QGraphicsSceneMouseEvent* me = (QGraphicsSceneMouseEvent*)e;
+    if (o == _scene.data()) {
+
+        switch ((int)e->type()) {
+        case QEvent::GraphicsSceneMousePress:
+            if (this->sceneMousePressEvent(me))
+                return true;
+            break;
+        case QEvent::GraphicsSceneMouseMove:
+            if (this->sceneMouseMoveEvent(me))
+                return true;
+            break;
+        case QEvent::GraphicsSceneMouseRelease:
+            if (this->sceneMouseReleaseEvent(me))
+                return true;
+            break;
+
+            // case QEvent::GraphicsSceneDrop:
+            //     break;
+        }
+    }
+
+    return QObject::eventFilter(o, e);
+}
+
+// todo: probably best to handle this in the views mousePressEvent
+bool NodeGraph::sceneMousePressEvent(QGraphicsSceneMouseEvent* event)
+{
+    // qDebug() << "Mouse Press!";
+    if (event->button() == Qt::LeftButton)
+        mbStates.left = true;
+    if (event->button() == Qt::MiddleButton)
+        mbStates.middle = true;
+    if (event->button() == Qt::RightButton)
+        mbStates.right = true;
+
+    // check for hit socket if left button is pressed
+    if (mbStates.left) {
+        auto scenePos = event->scenePos();
+        auto rawPort = this->getPortAtScenePos(scenePos.x(), scenePos.y());
+        if (rawPort) {
+            // auto port = rawPort->node->getPortById(rawPort->id());
+            // gotta cast to get the non-const version
+            PortPtr port = ((Port*)rawPort)->sharedFromThis();
+
+            // are we modifying an existing port with a connection?
+            if (port->portType == PortType::In) {
+                // in-sockets with an active connection are the only
+                // ones that can be edited, and that's the case here
+                if (port->connections.count() > 0) {
+                    // get the connection
+                    auto con = port->connections[0];
+
+                    // emit connection removal signal
+                    emit connectionRemoved(con);
+
+                    // remove it
+                    _scene->removeConnection(con);
+
+                    // make it activeCon
+                    con->endPort.clear();
+                    con->pos1 = con->startPort->scenePos();
+                    con->pos2 = scenePos;
+                    activeCon = con;
+                    activeCon->updatePathFromPositions();
+                    activeCon->connectState = ConnectionState::Dragging;
+
+                    this->_scene->addItem(activeCon.data());
+                    setDragMode(QGraphicsView::NoDrag);
+                    return true;
+                }
+                else {
+                    // allow starting connection from left to right?
+                }
+            }
+            // start new connection
+            else if (port->portType != PortType::Invalid /* in or out */) {
+                activeCon = ConnectionPtr(new Connection());
+                activeCon->startPort = port;
+                activeCon->connectState = ConnectionState::Dragging;
+
+                activeCon->pos1 = port->scenePos();
+                activeCon->pos2 = scenePos;
+                activeCon->updatePathFromPositions();
+
+                this->_scene->addItem(activeCon.data());
+
+                // prevent further clicking of other items?
+                // event->ignore();
+                setDragMode(QGraphicsView::NoDrag);
+                return true;
+            }
+            else {
+                qDebug() << "trying to hit an Invalid socket";
+            }
+
+            this->setDragMode(QGraphicsView::NoDrag);
+        }
+    }
+
+    return false;
+}
+
+bool NodeGraph::sceneMouseMoveEvent(QGraphicsSceneMouseEvent* event)
+{
+    auto scenePos = event->scenePos();
+    if (mbStates.left && !!activeCon) {
+        auto rawPort = this->getPortAtScenePos(scenePos.x(), scenePos.y());
+        if (rawPort) {
+            // snap if close enough
+            activeCon->pos2 = rawPort->scenePos();
+        }
+        else {
+            activeCon->pos2 = scenePos;
+        }
+        activeCon->updatePathFromPositions();
+    }
+
+    return false;
+}
+
+bool NodeGraph::sceneMouseReleaseEvent(QGraphicsSceneMouseEvent* event)
+{
+    if (event->button() == Qt::LeftButton)
+        mbStates.left = false;
+    if (event->button() == Qt::MiddleButton)
+        mbStates.middle = false;
+    if (event->button() == Qt::RightButton)
+        mbStates.right = false;
+
+    auto scenePos = event->scenePos();
+
+    if (mbStates.left == false && !!activeCon) {
+        auto rawPort = this->getPortAtScenePos(scenePos.x(), scenePos.y());
+        if (rawPort) {
+            // auto hitPort = rawPort->node->getPortById(rawPort->id());
+            // gotta cast to get the non-const version
+            PortPtr hitPort = ((Port*)rawPort)->sharedFromThis();
+
+            // determine between the in and out sockets
+            PortPtr leftPort;
+            PortPtr rightPort;
+
+            if (hitPort->portType == PortType::In) {
+                leftPort = activeCon->startPort;
+                rightPort = hitPort;
+            }
+            else {
+                leftPort = hitPort;
+                rightPort = activeCon->startPort;
+            }
+
+            // check validity of the potential connection
+            // NOTE: there's still a chance both leftPort and rightPort are
+            // still the same type or the same port
+
+            bool isConValid = true;
+
+            if (leftPort == rightPort) {
+                isConValid = false;
+                qDebug() << "invalid port";
+            }
+
+            if (leftPort->portType == rightPort->portType) {
+                isConValid = false;
+                qDebug() << "ports are the same";
+            }
+
+            // it's okay to check this since the two prior checks
+            // would have invalidated same-type and same-port connections
+            // todo: override connection
+            if (rightPort->connections.count() != 0) {
+                isConValid = false;
+                qDebug() << "right port has existing connections";
+            }
+
+            // todo: check for cycle
+
+            if (isConValid) {
+                // actually make connection
+                auto con =
+                    _scene->connectNodes(leftPort->node, leftPort->name,
+                                         rightPort->node, rightPort->name);
+
+                emit connectionAdded(con);
+                // todo: emit undo task
+            }
+        }
+
+        // remove from scene
+        _scene->removeItem(activeCon.data());
+        activeCon.clear();
+    }
+
+    // important to reset drag!
+    this->setDragMode(QGraphicsView::RubberBandDrag);
+    return false;
+}
+
+void NodeGraph::dragEnterEvent(QDragEnterEvent* evt) { evt->ignore(); }
+
+void NodeGraph::dragMoveEvent(QDragMoveEvent* evt) { evt->ignore(); }
+
+void NodeGraph::dropEvent(QDropEvent* evt) { evt->ignore(); }
+
+const Port* NodeGraph::getPortAtScenePos(float x, float y) const
+{
+    auto items = this->_scene->items(QPointF(x, y));
+    // auto items = this->items();
+    for (auto item : items) {
+        if (item && item->type() == (int)SceneItemType::Port)
+            return (const Port*)item;
+    }
+
+    return nullptr;
+}
+
+// get top-most node
+const Node* NodeGraph::getNodeAtScenePos(float x, float y) const
+{
+    auto items = this->_scene->items(QPointF(x, y));
+
+    for (auto item : items) {
+        if (item && item->type() == (int)SceneItemType::Node)
+            return (const Node*)item;
+    }
+
+    return nullptr;
+}
+
+void NodeGraph::handleSelectionChange()
+{
+    auto selected = this->_scene->selectedItems();
+    for (auto item : selected) {
+        if (item->type() == (int)SceneItemType::Node) {
+            emit nodeSelectionChanged(((Node*)item)->sharedFromThis());
+            return;
+        }
+    }
+
+    emit nodeSelectionChanged(NodePtr(nullptr));
+}
+
+NodeGraph::~NodeGraph() {}
+
+} // namespace nodegraph
\ No newline at end of file
diff --git a/src/nodegraph/nodegraph.h b/src/nodegraph/nodegraph.h
new file mode 100644
index 00000000..b25d062b
--- /dev/null
+++ b/src/nodegraph/nodegraph.h
@@ -0,0 +1,123 @@
+#pragma once
+
+#include "graph/scene.h"
+#include <QSharedPointer>
+#include <QtCore/QPointF>
+#include <QtCore/QRectF>
+#include <QtWidgets/QGraphicsView>
+
+class QWidget;
+class QWheelEvent;
+class QKeyEvent;
+class QMouseEvent;
+class QPainter;
+class QWheelEvent;
+class QShowEvent;
+
+namespace nodegraph {
+class Scene;
+class Node;
+class Connection;
+typedef QSharedPointer<Scene> ScenePtr;
+typedef QSharedPointer<Node> NodePtr;
+typedef QSharedPointer<Connection> ConnectionPtr;
+class Port;
+
+struct MouseButtonStates {
+    bool left;
+    bool middle;
+    bool right;
+
+    MouseButtonStates();
+
+    // reset all to false
+    void reset();
+};
+
+/*
+This class draws a lot of inspiration from NodeGraphQt
+https://github.com/jchanvfx/NodeGraphQt/blob/master/NodeGraphQt/widgets/viewer.py
+*/
+class NodeGraph : public QGraphicsView {
+    Q_OBJECT
+public:
+    NodeGraph(QWidget* parent = nullptr);
+
+    ScenePtr scene() const { return _scene; }
+    void setNodeGraphScene(const ScenePtr& scene);
+
+    void scaleUp();
+
+    void scaleDown();
+
+    virtual ~NodeGraph();
+
+protected:
+    void wheelEvent(QWheelEvent* event) override;
+
+    void keyPressEvent(QKeyEvent* event) override;
+
+    void keyReleaseEvent(QKeyEvent* event) override;
+
+    void mousePressEvent(QMouseEvent* event) override;
+
+    void mouseMoveEvent(QMouseEvent* event) override;
+
+    void mouseReleaseEvent(QMouseEvent* event) override;
+
+    void mouseDoubleClickEvent(QMouseEvent* event) override;
+
+    void drawBackground(QPainter* painter, const QRectF& r) override;
+
+    void showEvent(QShowEvent* event) override;
+
+    bool eventFilter(QObject* o, QEvent* e) override;
+
+    // events coming from the scene
+    // void sceneKeyPressEvent(QKeyEvent *event);
+
+    // void sceneKeyReleaseEvent(QKeyEvent *event);
+
+    // NOTE: these functions return true if they swallow the event
+    // this is because they're implemented using eventFilters and
+    // that's how eventFilters work in qt
+    bool sceneMousePressEvent(QGraphicsSceneMouseEvent* event);
+
+    bool sceneMouseMoveEvent(QGraphicsSceneMouseEvent* event);
+
+    bool sceneMouseReleaseEvent(QGraphicsSceneMouseEvent* event);
+
+    // allow drag and drop
+    // https://stackoverflow.com/a/7210404
+    // must ignore the events in nodegraph so they
+    // propagate to the parent widget
+    void dragEnterEvent(QDragEnterEvent* evt);
+    void dragMoveEvent(QDragMoveEvent* event);
+    void dropEvent(QDropEvent* event);
+
+    const Port* getPortAtScenePos(float x, float y) const;
+    const Node* getNodeAtScenePos(float x, float y) const;
+    void handleSelectionChange();
+
+private:
+    QPointF _clickPos;
+    ScenePtr _scene;
+    MouseButtonStates mbStates;
+    ConnectionPtr activeCon;
+
+    QList<NodePtr> nodes;
+    QList<ConnectionPtr> cons;
+
+signals:
+    void connectionAdded(ConnectionPtr con);
+    void connectionRemoved(ConnectionPtr con);
+    void nodeAdded(NodePtr node);
+    void nodeRemoved(NodePtr node);
+
+    // null nodeptr means no active node selected
+    void nodeSelectionChanged(const NodePtr& node);
+    void nodeDoubleClicked(const NodePtr& node);
+
+    void itemsDeleted(QList<NodePtr> nodes, QList<ConnectionPtr> cons);
+};
+} // namespace nodegraph
\ No newline at end of file
diff --git a/src/nodegraph/utils.h b/src/nodegraph/utils.h
new file mode 100644
index 00000000..6b9ceb66
--- /dev/null
+++ b/src/nodegraph/utils.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <QUuid>
+
+QString genGuid()
+{
+    return QUuid::createUuid().toString(QUuid::WithoutBraces);
+}
\ No newline at end of file
diff --git a/src/router.ts b/src/router.ts
deleted file mode 100644
index 2c15b699..00000000
--- a/src/router.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import Vue from "vue";
-import Router from "vue-router";
-import Home from "./views/Home.vue";
-
-Vue.use(Router);
-
-export default new Router({
-	routes: [
-		{
-			path: "/",
-			name: "home",
-			component: Home
-		},
-		{
-			path: "/about",
-			name: "about",
-			// route level code-splitting
-			// this generates a separate chunk (about.[hash].js) for this route
-			// which is lazy-loaded when the route is visited.
-			component: () =>
-				import(/* webpackChunkName: "about" */ "./views/About.vue")
-		}
-	]
-});
diff --git a/src/settings.ts b/src/settings.ts
deleted file mode 100644
index ffd0c0b0..00000000
--- a/src/settings.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export enum Settings {
-	RecentFiles = "recent_files"
-}
diff --git a/src/shims-tsx.d.ts b/src/shims-tsx.d.ts
deleted file mode 100644
index 151d2983..00000000
--- a/src/shims-tsx.d.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import Vue, { VNode } from "vue";
-
-declare global {
-	namespace JSX {
-		// tslint:disable no-empty-interface
-		type Element = VNode;
-		// tslint:disable no-empty-interface
-		type ElementClass = Vue;
-		interface IntrinsicElements {
-			[elem: string]: any;
-		}
-	}
-}
diff --git a/src/shims-vue.d.ts b/src/shims-vue.d.ts
deleted file mode 100644
index 9ab7f9cd..00000000
--- a/src/shims-vue.d.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-declare module "*.vue" {
-	import Vue from "vue";
-	export default Vue;
-}
-
-declare module "*.json" {
-	const value: { [key: string]: any };
-	export default value;
-}
diff --git a/src/store.ts b/src/store.ts
deleted file mode 100644
index 0a6a3f7e..00000000
--- a/src/store.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-import Vue from "vue";
-import Vuex from "vuex";
-
-Vue.use(Vuex);
-
-export default new Vuex.Store({
-	state: {},
-	mutations: {},
-	actions: {}
-});
diff --git a/src/texturelab/CMakeLists.txt b/src/texturelab/CMakeLists.txt
new file mode 100644
index 00000000..911a6817
--- /dev/null
+++ b/src/texturelab/CMakeLists.txt
@@ -0,0 +1,178 @@
+cmake_minimum_required(VERSION 3.5)
+
+project(texturelab VERSION 0.4.0 LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets OpenGL)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets OpenGLWidgets)
+
+set(LIBRARYV1
+    ./libraries/v1/blend.cpp
+    ./libraries/v1/brickgenerator.cpp
+    ./libraries/v1/brightnesscontrast.cpp
+    ./libraries/v1/cell.cpp
+    ./libraries/v1/checkerboard.cpp
+    ./libraries/v1/copy.cpp
+    ./libraries/v1/color.cpp
+    ./libraries/v1/directionalwarp.cpp
+    ./libraries/v1/fractalnoise.cpp
+    ./libraries/v1/gradient.cpp
+    ./libraries/v1/gradientmap.cpp
+    ./libraries/v1/heightshift.cpp
+    ./libraries/v1/hexagon.cpp
+    ./libraries/v1/invert.cpp
+    ./libraries/v1/linecell.cpp
+    ./libraries/v1/maprange.cpp
+    ./libraries/v1/mask.cpp
+    ./libraries/v1/mirror.cpp
+    ./libraries/v1/normalmap.cpp
+    ./libraries/v1/output.cpp
+    ./libraries/v1/perlin3d.cpp
+    ./libraries/v1/shapes.cpp
+    ./libraries/v1/solidcell.cpp
+    ./libraries/v1/splat.cpp
+    ./libraries/v1/threshold.cpp
+    ./libraries/v1/tile.cpp
+    ./libraries/v1/transform2d.cpp
+    ./libraries/v1/warp.cpp
+    ./libraries/v1/wave.cpp
+)
+
+set(LIBRARYV2
+    ./libraries/v2/advancesplatter.cpp
+    ./libraries/v2/anisotropicblur.cpp
+    ./libraries/v2/bevel.cpp
+    ./libraries/v2/blur.cpp
+    ./libraries/v2/capsule.cpp
+    ./libraries/v2/cartesiantopolar.cpp
+    ./libraries/v2/circularsplatter.cpp
+    ./libraries/v2/clamp.cpp
+    ./libraries/v2/combinenormals.cpp
+    ./libraries/v2/directionalblur.cpp
+    ./libraries/v2/directionalwarpv2.cpp
+    ./libraries/v2/extractchannel.cpp
+    ./libraries/v2/floodfill.cpp
+    ./libraries/v2/floodfillsampler.cpp
+    ./libraries/v2/floodfilltobbox.cpp
+    ./libraries/v2/floodfilltocolor.cpp
+    ./libraries/v2/floodfilltogradient.cpp
+    ./libraries/v2/floodfilltorandomcolor.cpp
+    ./libraries/v2/floodfilltorandomintensity.cpp
+    ./libraries/v2/gradientdynamic.cpp
+    ./libraries/v2/gradientnoise.cpp
+    ./libraries/v2/gradientnoisefractalsum.cpp
+    ./libraries/v2/grayscale.cpp
+    ./libraries/v2/histogramscan.cpp
+    ./libraries/v2/histogramselect.cpp
+    ./libraries/v2/histogramshift.cpp
+    ./libraries/v2/hsl.cpp
+    ./libraries/v2/hslextract.cpp
+    ./libraries/v2/imagenode.cpp
+    ./libraries/v2/invertnormal.cpp
+    ./libraries/v2/normalmapv2.cpp
+    ./libraries/v2/polartocartesian.cpp
+    ./libraries/v2/pow.cpp
+    ./libraries/v2/quantize.cpp
+    ./libraries/v2/rgbamerge.cpp
+    ./libraries/v2/rgbashuffle.cpp
+    ./libraries/v2/simplexnoisev2.cpp
+    ./libraries/v2/skew.cpp
+    ./libraries/v2/slopeblur.cpp
+    ./libraries/v2/softflower.cpp
+    ./libraries/v2/splatv2.cpp
+    ./libraries/v2/star.cpp
+    ./libraries/v2/stripes.cpp
+    ./libraries/v2/tilesampler.cpp
+    ./libraries/v2/transform2dv2.cpp
+    ./libraries/v2/valuenoise.cpp
+    ./libraries/v2/valuenoisefractalsum.cpp
+    ./libraries/v2/warpv2.cpp
+)
+
+set(PROJECT_SOURCES
+        ./main.cpp
+        ./mainwindow.cpp
+        ./mainwindow.h
+        ./utils.h
+        ./models.h
+        ./models.cpp
+        ./project.h
+        ./project.cpp
+        ./props.h
+        ./props.cpp
+        ./libraries/libv2.h
+        ./libraries/libv2.h
+        ./libraries/library.h
+        ./libraries/library.cpp
+        ./widgets/graphwidget.h
+        ./widgets/graphwidget.cpp
+        ./widgets/librarywidget.h
+        ./widgets/librarywidget.cpp
+        ./widgets/properties/propertieswidget.h
+        ./widgets/properties/propertieswidget.cpp
+        ./widgets/properties/propwidgets.h
+        ./widgets/properties/propwidgets.cpp
+        ./widgets/view2dwidget.h
+        ./widgets/view2dwidget.cpp
+        ./widgets/view3dwidget.h
+        ./widgets/view3dwidget.cpp
+        ./graphics/texturerenderer.h
+        ./graphics/texturerenderer.cpp
+        ${LIBRARYV1}
+        ${LIBRARYV2}
+)
+
+set(PROJECT_RESOURCES
+    ./assets.qrc)
+
+if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
+    qt_add_executable(texturelab
+        MANUAL_FINALIZATION
+        ${PROJECT_SOURCES}
+        ${PROJECT_RESOURCES}
+    )
+else()
+    add_executable(texturelab
+        ${PROJECT_SOURCES}
+        ${PROJECT_RESOURCES}
+    )
+endif()
+
+# note: openglwidgets is qt6 only
+target_link_libraries(texturelab PRIVATE Qt${QT_VERSION_MAJOR}::Widgets 
+                                         Qt${QT_VERSION_MAJOR}::OpenGL 
+                                         Qt${QT_VERSION_MAJOR}::OpenGLWidgets 
+                                         qtadvanceddocking 
+                                         nodegraph
+                                         viewer3d)
+                                         
+target_include_directories(texturelab PUBLIC
+                            ../ads/src
+                            ../nodegraph
+                            ../viewer3d
+                            )
+
+set_target_properties(texturelab PROPERTIES
+    MACOSX_BUNDLE_GUI_IDENTIFIER io.texturelab.app
+    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
+    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
+    MACOSX_BUNDLE TRUE
+    WIN32_EXECUTABLE TRUE
+)
+
+
+install(TARGETS texturelab
+    BUNDLE DESTINATION .
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+
+if(QT_VERSION_MAJOR EQUAL 6)
+    qt_finalize_executable(texturelab)
+endif()
diff --git a/src/texturelab/assets.qrc b/src/texturelab/assets.qrc
new file mode 100644
index 00000000..d6532c56
--- /dev/null
+++ b/src/texturelab/assets.qrc
@@ -0,0 +1,89 @@
+<RCC>
+    <qresource prefix="/">
+    <file alias="nodes/bevel.png">../../public/assets/nodes/bevel.png</file>
+    <file alias="nodes/circle.png">../../public/assets/nodes/circle.png</file>
+    <file alias="nodes/color.png">../../public/assets/nodes/color.png</file>
+    <file alias="nodes/blend.png">../../public/assets/nodes/blend.png</file>
+    <file alias="nodes/output.png">../../public/assets/nodes/output.png</file>
+    <file alias="nodes/brickgenerator.png">../../public/assets/nodes/brickgenerator.png</file>
+    <file alias="nodes/brightnesscontrast.png">../../public/assets/nodes/brightnesscontrast.png</file>
+    <file alias="nodes/cell.png">../../public/assets/nodes/cell.png</file>
+    <file alias="nodes/checkerboard.png">../../public/assets/nodes/checkerboard.png</file>
+    <file alias="nodes/copy.png">../../public/assets/nodes/copy.png</file>
+    <file alias="nodes/fractalnoise.png">../../public/assets/nodes/fractalnoise.png</file>
+    <file alias="nodes/directionalwarp.png">../../public/assets/nodes/directionalwarp.png</file>
+    <file alias="nodes/gradient.png">../../public/assets/nodes/gradient.png</file>
+    <file alias="nodes/gradientmap.png">../../public/assets/nodes/gradientmap.png</file>
+    <file alias="nodes/heightshift.png">../../public/assets/nodes/heightshift.png</file>
+    <file alias="nodes/hexagon.png">../../public/assets/nodes/hexagon.png</file>
+    <file alias="nodes/invert.png">../../public/assets/nodes/invert.png</file>
+    <file alias="nodes/linecell.png">../../public/assets/nodes/linecell.png</file>
+    <file alias="nodes/maprange.png">../../public/assets/nodes/maprange.png</file>
+    <file alias="nodes/mask.png">../../public/assets/nodes/mask.png</file>
+    <file alias="nodes/mirror.png">../../public/assets/nodes/mirror.png</file>
+    <file alias="nodes/normalmap.png">../../public/assets/nodes/normalmap.png</file>
+    <file alias="nodes/output.png">../../public/assets/nodes/output.png</file>
+    <file alias="nodes/perlin3d.png">../../public/assets/nodes/perlin3d.png</file>
+    <!-- <file alias="nodes/shapes.png">../../public/assets/nodes/shapes.png</file> -->
+    <file alias="nodes/simplexnoise.png">../../public/assets/nodes/simplexnoise.png</file>
+    <file alias="nodes/solidcell.png">../../public/assets/nodes/solidcell.png</file>
+    <file alias="nodes/splat.png">../../public/assets/nodes/splat.png</file>
+    <file alias="nodes/threshold.png">../../public/assets/nodes/threshold.png</file>
+    <file alias="nodes/tile.png">../../public/assets/nodes/tile.png</file>
+    <file alias="nodes/transform2d.png">../../public/assets/nodes/transform2d.png</file>
+    <file alias="nodes/warp.png">../../public/assets/nodes/warp.png</file>
+    <file alias="nodes/wave.png">../../public/assets/nodes/wave.png</file>
+    <!-- v2 nodes -->
+    <file alias="nodes/advancesplatter.png">../../public/assets/nodes/advancesplatter.png</file>
+    <file alias="nodes/anisotropicblur.png">../../public/assets/nodes/anisotropicblur.png</file>
+    <file alias="nodes/bevel.png">../../public/assets/nodes/bevel.png</file>
+    <file alias="nodes/blurv2.png">../../public/assets/nodes/blurv2.png</file>
+    <file alias="nodes/capsule.png">../../public/assets/nodes/capsule.png</file>
+    <file alias="nodes/cartesiantopolar.png">../../public/assets/nodes/cartesiantopolar.png</file>
+    <file alias="nodes/circularsplatter.png">../../public/assets/nodes/circularsplatter.png</file>
+    <file alias="nodes/clamp.png">../../public/assets/nodes/clamp.png</file>
+    <file alias="nodes/combinenormals.png">../../public/assets/nodes/combinenormals.png</file>
+    <file alias="nodes/directionalblur.png">../../public/assets/nodes/directionalblur.png</file>
+    <!-- <file alias="nodes/directionalwarpv2.png">../../public/assets/nodes/directionalwarpv2.png</file> -->
+    <file alias="nodes/extractchannel.png">../../public/assets/nodes/extractchannel.png</file>
+    <file alias="nodes/floodfill.png">../../public/assets/nodes/floodfill.png</file>
+    <file alias="nodes/floodfillsampler.png">../../public/assets/nodes/floodfillsampler.png</file>
+    <file alias="nodes/floodfilltobbox.png">../../public/assets/nodes/floodfilltobbox.png</file>
+    <file alias="nodes/floodfilltocolor.png">../../public/assets/nodes/floodfilltocolor.png</file>
+    <file alias="nodes/floodfilltogradient.png">../../public/assets/nodes/floodfilltogradient.png</file>
+    <file alias="nodes/floodfilltorandomcolor.png">../../public/assets/nodes/floodfilltorandomcolor.png</file>
+    <file alias="nodes/floodfilltorandomintensity.png">../../public/assets/nodes/floodfilltorandomintensity.png</file>
+    <file alias="nodes/gradientdynamic.png">../../public/assets/nodes/gradientdynamic.png</file>
+    <file alias="nodes/gradientnoisefractalsum.png">../../public/assets/nodes/gradientnoisefractalsum.png</file>
+    <file alias="nodes/grayscale.png">../../public/assets/nodes/grayscale.png</file>
+    <file alias="nodes/histogramscan.png">../../public/assets/nodes/histogramscan.png</file>
+    <file alias="nodes/histogramselect.png">../../public/assets/nodes/histogramselect.png</file>
+    <file alias="nodes/histogramshift.png">../../public/assets/nodes/histogramshift.png</file>
+    <file alias="nodes/hsl.png">../../public/assets/nodes/hsl.png</file>
+    <file alias="nodes/hslextract.png">../../public/assets/nodes/hslextract.png</file>
+    <file alias="nodes/image.png">../../public/assets/nodes/image.png</file>
+    <file alias="nodes/invertnormal.png">../../public/assets/nodes/invertnormal.png</file>
+    <!-- <file alias="nodes/normalmapv2.png">../../public/assets/nodes/normalmapv2.png</file> -->
+    <file alias="nodes/polartocartesian.png">../../public/assets/nodes/polartocartesian.png</file>
+    <file alias="nodes/pow.png">../../public/assets/nodes/pow.png</file>
+    <file alias="nodes/quantize.png">../../public/assets/nodes/quantize.png</file>
+    <file alias="nodes/rgbamerge.png">../../public/assets/nodes/rgbamerge.png</file>
+    <file alias="nodes/rgbashuffle.png">../../public/assets/nodes/rgbashuffle.png</file>
+    <file alias="nodes/simplexnoise.png">../../public/assets/nodes/simplexnoise.png</file>
+    <file alias="nodes/skew.png">../../public/assets/nodes/skew.png</file>
+    <file alias="nodes/slopeblur.png">../../public/assets/nodes/slopeblur.png</file>
+    <file alias="nodes/softflower.png">../../public/assets/nodes/softflower.png</file>
+    <file alias="nodes/splat.png">../../public/assets/nodes/splat.png</file>
+    <file alias="nodes/star.png">../../public/assets/nodes/star.png</file>
+    <file alias="nodes/stripes.png">../../public/assets/nodes/stripes.png</file>
+    <file alias="nodes/tilesampler.png">../../public/assets/nodes/tilesampler.png</file>
+    <!-- <file alias="nodes/transform2dv2.png">../../public/assets/nodes/transform2dv2.png</file> -->
+    <file alias="nodes/valuenoise.png">../../public/assets/nodes/valuenoise.png</file>
+    <file alias="nodes/valuenoisefractalsum.png">../../public/assets/nodes/valuenoisefractalsum.png</file>
+    <!-- <file alias="nodes/warpv2.png">../../public/assets/nodes/warpv2.png</file> -->
+    <!-- v3 nodes -->
+    <!-- <file alias="nodes/crop.png">../../public/assets/nodes/crop.png</file> -->
+    
+    <file alias="env/cave_wall_1k.hdr">../../public/assets/env/cave_wall/cave_wall_1k.hdr</file>
+    </qresource>
+</RCC>
\ No newline at end of file
diff --git a/src/texturelab/graphics/texturerenderer.cpp b/src/texturelab/graphics/texturerenderer.cpp
new file mode 100644
index 00000000..3fffad17
--- /dev/null
+++ b/src/texturelab/graphics/texturerenderer.cpp
@@ -0,0 +1,773 @@
+#include "texturerenderer.h"
+// #include "../models.h"
+
+// https://forum.qt.io/topic/84779/how-to-create-a-qoffscreensurface-correctly/4
+// #include <QGLFramebufferObject>
+#include <QImage>
+#include <QOffscreenSurface>
+#include <QOpenGLBuffer>
+#include <QOpenGLContext>
+#include <QOpenGLDebugLogger>
+#include <QOpenGLFramebufferObject>
+#include <QOpenGLFunctions_3_2_Core>
+#include <QOpenGLShader>
+#include <QOpenGLTexture>
+#include <QOpenGLVertexArrayObject>
+// Qt6 only!!
+#include <QOpenGLVersionFunctionsFactory>
+// #include <QOpenGLPaintDevice>
+// #include <QtGui/QOpenGLFunctions_3_3_Core>
+
+#include "../props.h"
+#include "models.h"
+
+enum class VertexUsage : int {
+    Position = 0,
+    Color = 1,
+    TexCoord0 = 2,
+    TexCoord1 = 3,
+    TexCoord2 = 4,
+    TexCoord3 = 5,
+    Normal = 6,
+    Tangent = 7,
+    Count = 8
+};
+
+const int TEXTURE_SIZE = 1024;
+
+// https://github.com/cromop/mOffscreenRendering/blob/master/OGLWidget.cpp
+// https://github.com/florianblume/Qt3D-OffscreenRenderer/blob/master/offscreensurfaceframegraph.h
+// https://stackoverflow.com/questions/60515589/offscreen-render-with-qoffscreensurface-using-docker
+void TextureRenderer::testRendering()
+{
+    // create shader
+    QOpenGLShader* vshader = new QOpenGLShader(QOpenGLShader::Vertex);
+    QOpenGLShader* fshader = new QOpenGLShader(QOpenGLShader::Fragment);
+    auto program = new QOpenGLShaderProgram;
+
+    QString vSource = R""""(
+        #version 150 core
+
+        in vec3 a_pos;
+        in vec2 a_texCoord;
+
+        out vec2 v_texCoord;
+
+        void main()
+        {
+                v_texCoord = a_texCoord*vec2(1,1);
+                gl_Position = vec4(a_pos,1);
+        }
+    )"""";
+
+    QString fSource = R""""(
+        #version 150 core
+
+        in vec2 v_texCoord;
+
+        out vec4 fragColor;
+
+        void main()
+        {
+            vec4 col = vec4(v_texCoord.x, v_texCoord.y, 1.0, 1.0);
+
+            fragColor = col;
+        }
+    )"""";
+
+    if (!vshader->compileSourceCode(vSource)) {
+        qDebug() << "VERTEX SHADER ERROR";
+        qDebug() << vshader->log();
+    }
+
+    if (!fshader->compileSourceCode(fSource)) {
+        qDebug() << "FRAGMENT SHADER ERROR";
+        qDebug() << fshader->log();
+    }
+
+    program->removeAllShaders();
+
+    program->addShader(vshader);
+    program->addShader(fshader);
+
+    program->bindAttributeLocation("a_pos", (int)VertexUsage::Position);
+    program->bindAttributeLocation("a_color", (int)VertexUsage::Color);
+    program->bindAttributeLocation("a_texCoord", (int)VertexUsage::TexCoord0);
+
+    if (!program->link()) {
+        qDebug() << "SHADER LINK ERROR";
+        qDebug() << program->log();
+    }
+
+    // render quad (bind vbo, shader, vbo, etc)
+    fbo->bind();
+    gl->glViewport(0, 0, TEXTURE_SIZE, TEXTURE_SIZE);
+
+    gl->glClearColor(0, 0, 0, 1);
+    gl->glClearDepth(0);
+    gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    vao->bind();
+
+    program->bind();
+
+    vbo->bind();
+    gl->glEnableVertexAttribArray((int)VertexUsage::Position);
+    gl->glEnableVertexAttribArray((int)VertexUsage::TexCoord0);
+    gl->glVertexAttribPointer((int)VertexUsage::Position, 3, GL_FLOAT, GL_FALSE,
+                              5 * sizeof(float), nullptr);
+    gl->glVertexAttribPointer((int)VertexUsage::TexCoord0, 2, GL_FLOAT,
+                              GL_FALSE, 5 * sizeof(float),
+                              reinterpret_cast<void*>(3 * sizeof(float)));
+
+    gl->glDrawArrays(GL_TRIANGLES, 0, 6);
+
+    vbo->release();
+
+    gl->glBindFramebuffer(GL_FRAMEBUFFER, ctx->defaultFramebufferObject());
+
+    // grab pixels to pixmap
+    auto img = fbo->toImage();
+    img.save("./render.png");
+
+    // save to desktop
+}
+
+void TextureRenderer::setup()
+{
+    // create surface
+    surface = new QOffscreenSurface();
+    // QSurfaceFormat format = QSurfaceFormat::defaultFormat();
+    // format.setMajorVersion(3);
+    // format.setMinorVersion(2);
+
+    QSurfaceFormat format;
+    format.setDepthBufferSize(32);
+    format.setMajorVersion(3);
+    format.setMinorVersion(2);
+    format.setProfile(QSurfaceFormat::CoreProfile);
+    format.setSamples(1);
+    format.setSwapInterval(0);
+    format.setOption(QSurfaceFormat::DebugContext); // for debugging
+
+    surface->setFormat(format);
+    surface->create();
+
+    // create context
+    ctx = new QOpenGLContext();
+    // https://doc.qt.io/qt-6/qopenglcontext.html#globalShareContext
+    ctx->setShareContext(QOpenGLContext::globalShareContext());
+    ctx->setFormat(format);
+    if (!ctx->create()) {
+        qFatal("unable to create surface!");
+    }
+
+    ctx->makeCurrent(surface);
+
+    // https://doc-snapshots.qt.io/qt6-dev/gui-changes-qt6.html
+    gl = QOpenGLVersionFunctionsFactory::get<QOpenGLFunctions_3_2_Core>(ctx);
+    if (!gl) {
+        qFatal("Could not obtain required OpenGL context version");
+    }
+
+    // setup debugging
+    QOpenGLDebugLogger* logger = new QOpenGLDebugLogger();
+    logger->initialize();
+
+    QObject::connect(logger, &QOpenGLDebugLogger::messageLogged,
+                     [=](const QOpenGLDebugMessage& debugMessage) {
+                         qDebug() << debugMessage;
+                     });
+
+    logger->startLogging();
+
+    gl->initializeOpenGLFunctions();
+
+    // simple setup
+    gl->glViewport(0, 0, TEXTURE_SIZE, TEXTURE_SIZE);
+    gl->glDisable(GL_BLEND);
+    gl->glDisable(GL_DEPTH_TEST);
+    gl->glDisable(GL_CULL_FACE);
+
+    // setup vbo
+    vao = new QOpenGLVertexArrayObject;
+    if (vao->create())
+        vao->bind();
+
+    // setup vertex array
+    QVector<float> data;
+    // TRIANGLE 1
+    data.append(-1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(0);
+    data.append(0);
+
+    data.append(1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(1);
+    data.append(0);
+
+    data.append(-1);
+    data.append(1);
+    data.append(0);
+
+    data.append(0);
+    data.append(1);
+
+    // TRIANGLE 2
+    data.append(-1);
+    data.append(1);
+    data.append(0);
+
+    data.append(0);
+    data.append(1);
+
+    data.append(1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(1);
+    data.append(0);
+
+    data.append(1);
+    data.append(1);
+    data.append(0);
+
+    data.append(1);
+    data.append(1);
+
+    vbo = new QOpenGLBuffer;
+    vbo->create();
+    vbo->bind();
+    vbo->allocate(data.constData(), data.count() * sizeof(float));
+    vbo->release();
+
+    // create fbo
+    // https://doc.qt.io/qt-6/qopenglframebufferobject.html
+    // https://www.qt.io/blog/2015/09/21/using-modern-opengl-es-features-with-qopenglframebufferobject-in-qt-5-6
+    fbo = new QOpenGLFramebufferObject(TEXTURE_SIZE, TEXTURE_SIZE);
+    if (!fbo->isValid()) {
+        qFatal("FBO could not be created");
+    }
+}
+
+TextureRenderer::TextureRenderer() { this->setup(); }
+
+void TextureRenderer::setProject(TextureProjectPtr project)
+{
+    this->project = project;
+}
+
+void TextureRenderer::update()
+{
+    if (!project)
+        return;
+
+    // check for nodes that need updating and update
+    for (auto& node : project->nodes) {
+        if (!node->isGraphicsResourcesInitialized()) {
+            // create texture
+            initializeNodeGraphicsResources(node);
+        }
+
+        // if the resolution has changed, resize texture
+        if (project->textureWidth != node->textureWidth ||
+            project->textureHeight != node->textureHeight) {
+            // resize
+            // resizeNodeTexture(node);
+            node->textureWidth = project->textureWidth;
+            node->textureHeight = project->textureHeight;
+            node->texture = new QOpenGLFramebufferObject(node->textureWidth,
+                                                         node->textureHeight);
+
+            // clear pixmap and emit thumbnail changed?
+        }
+
+        // if (node->needsUpdate()) {
+
+        //     // process
+        // }
+    }
+
+    ctx->makeCurrent(surface);
+    // todo: use quota
+    while (true) {
+        auto nextNode = getNextUpdatableNode();
+        if (!nextNode)
+            break;
+
+        qDebug() << "Rendering node: " << nextNode->id;
+        renderNode(nextNode);
+
+        nextNode->isDirty = false;
+
+        // auto img = nextNode->texture->toImage();
+        // emit thumbnailGenerated(nextNode->id,  QPixmap::fromImage(img));
+
+        auto texId = nextNode->texture->texture();
+        emit thumbnailGenerated(nextNode->id, texId, QPixmap());
+    }
+
+    ctx->doneCurrent();
+}
+
+void TextureRenderer::initializeNodeGraphicsResources(
+    const TextureNodePtr& node)
+{
+    ctx->makeCurrent(surface);
+
+    // create fbo
+    node->texture = new QOpenGLFramebufferObject(project->textureWidth,
+                                                 project->textureWidth);
+    node->textureWidth = project->textureWidth;
+    node->textureHeight = project->textureHeight;
+
+    if (!node->texture->isValid()) {
+        qFatal("FBO could not be created");
+    }
+
+    // make texture wrap
+    gl->glBindTexture(GL_TEXTURE_2D, node->textureId());
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    gl->glBindTexture(GL_TEXTURE_2D, 0);
+
+    // build and compile shaders
+    node->shader = buildShaderForNode(node);
+    ctx->doneCurrent();
+}
+
+void TextureRenderer::renderNode(const TextureNodePtr& node)
+{
+    node->texture->bind();
+    gl->glViewport(0, 0, node->textureWidth, node->textureHeight);
+
+    gl->glClearColor(0, 0, 0, 1);
+    gl->glClearDepth(0);
+    gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    vao->bind();
+
+    auto shader = node->shader;
+
+    if (shader->isLinked()) {
+        shader->bind();
+
+        // clear all inputs
+        int texIndex = 0;
+        for (auto input : node->inputs) {
+            gl->glActiveTexture(GL_TEXTURE0 + texIndex);
+            gl->glBindTexture(GL_TEXTURE_2D, 0);
+
+            // gl->glUniform1i(node->shader->uniformLocation(input), 0);
+            shader->setUniformValue(input.toStdString().c_str(), 0);
+            shader->setUniformValue(
+                (input + "_connected").toStdString().c_str(), 0);
+
+            texIndex++;
+        }
+
+        // pass inputs
+        auto nodeInputs = getNodeInputs(node);
+        texIndex = 0;
+        for (auto nodeInput : nodeInputs) {
+            gl->glActiveTexture(GL_TEXTURE0 + texIndex);
+            // if (!nodeInput.node->texture->bind())
+            //     qFatal("could not bind texture");
+            gl->glBindTexture(GL_TEXTURE_2D,
+                              nodeInput.node->texture->texture());
+
+            auto name = nodeInput.name;
+            // gl->glUniform1i(node->shader->uniformLocation(input), 0);
+            shader->setUniformValue(name.toStdString().c_str(), texIndex);
+            shader->setUniformValue((name + "_connected").toStdString().c_str(),
+                                    1);
+
+            texIndex++;
+        }
+
+        // pass seed
+        shader->setUniformValue(
+            "_seed", (GLint)(project->randomSeed + node->randomSeed));
+
+        // texture size
+        shader->setUniformValue(
+            "_textureSize",
+            QVector2D(project->textureWidth, project->textureHeight));
+
+        // pass props
+        for (auto prop : node->props) {
+            auto propCString = ("prop_" + prop->name.toStdString());
+            auto propName = propCString.c_str();
+            // qDebug() << "glsl prop: " << propName;
+            switch (prop->type) {
+            case PropType::Int: {
+                auto intVal = ((IntProp*)prop)->value;
+                shader->setUniformValue(propName, (GLint)intVal);
+            } break;
+            case PropType::Float: {
+                auto floatVal = ((FloatProp*)prop)->value;
+                shader->setUniformValue(propName, (GLfloat)floatVal);
+            } break;
+            case PropType::Bool: {
+                auto boolVal = ((BoolProp*)prop)->value;
+                shader->setUniformValue(propName, (GLint)boolVal == true);
+            } break;
+            case PropType::Enum: {
+                auto enumVal = ((EnumProp*)prop)->index;
+                shader->setUniformValue(propName, (GLint)enumVal);
+            } break;
+            case PropType::Color: {
+                auto colorVal = ((ColorProp*)prop)->value;
+                shader->setUniformValue(
+                    propName, QVector4D(colorVal.redF(), colorVal.greenF(),
+                                        colorVal.blueF(), colorVal.alphaF()));
+            } break;
+            case PropType::Gradient:
+                // todo: pass gradient
+                break;
+            }
+        }
+
+        // render triangles
+        vbo->bind();
+        gl->glEnableVertexAttribArray((int)VertexUsage::Position);
+        gl->glEnableVertexAttribArray((int)VertexUsage::TexCoord0);
+        gl->glVertexAttribPointer((int)VertexUsage::Position, 3, GL_FLOAT,
+                                  GL_FALSE, 5 * sizeof(float), nullptr);
+        gl->glVertexAttribPointer((int)VertexUsage::TexCoord0, 2, GL_FLOAT,
+                                  GL_FALSE, 5 * sizeof(float),
+                                  reinterpret_cast<void*>(3 * sizeof(float)));
+
+        gl->glDrawArrays(GL_TRIANGLES, 0, 6);
+
+        vbo->release();
+    }
+
+    vao->release();
+
+    // gl->glBindFramebuffer(GL_FRAMEBUFFER,
+    // ctx->defaultFramebufferObject());
+
+    // grab pixels to pixmap
+    // auto img = node->texture->toImage();
+    // img.save(node->id + ".png");
+
+    node->texture->release();
+}
+
+QVector<NodeInput> TextureRenderer::getNodeInputs(const TextureNodePtr& node)
+{
+    QVector<NodeInput> inputs;
+    for (auto con : project->connections) {
+        if (con->rightNode == node) {
+            inputs.append({con->leftNode, con->rightNodeInputName});
+        }
+    }
+
+    return inputs;
+}
+
+TextureNodePtr TextureRenderer::getNextUpdatableNode() const
+{
+    // for each node, if node is dirty and all deps are
+    // non-dirty the this is a valid node
+
+    for (auto node : project->nodes) {
+        if (!node->isDirty)
+            continue;
+
+        auto hasCleanDeps = true;
+
+        // we have a dirty node, check if all deps are clean
+        auto deps = project->getNodeDependencies(node->id);
+        for (auto dep : deps) {
+            if (dep->isDirty) {
+                hasCleanDeps = false;
+                break;
+            }
+        }
+
+        if (hasCleanDeps) {
+            return node;
+        }
+    }
+
+    return TextureNodePtr(nullptr);
+}
+
+QOpenGLShaderProgram*
+TextureRenderer::buildShaderForNode(const TextureNodePtr& node)
+{
+    ctx->makeCurrent(surface);
+
+    QOpenGLShader* vshader = new QOpenGLShader(QOpenGLShader::Vertex);
+    QOpenGLShader* fshader = new QOpenGLShader(QOpenGLShader::Fragment);
+    auto program = new QOpenGLShaderProgram;
+
+    QString vSource = R""""(
+        #version 150 core
+
+        //precision highp float;
+
+        in vec3 a_pos;
+        in vec2 a_texCoord;
+
+        out vec2 v_texCoord;
+
+        void main()
+        {
+                v_texCoord = a_texCoord;
+                gl_Position = vec4(a_pos,1);
+        }
+    )"""";
+
+    QString fSource = R""""(
+        #version 150 core
+        //precision highp float;
+        in vec2 v_texCoord;
+
+        #define GRADIENT_MAX_POINTS 32        
+
+        vec4 process(vec2 uv);
+        void initRandom();
+
+        uniform vec2 _textureSize;
+
+        out vec4 fragColor;
+            
+        void main() {
+            initRandom();
+			vec4 result = process(v_texCoord);
+			fragColor = clamp(result, 0.0, 1.0);
+        }
+        
+    )"""";
+
+    fSource = fSource + this->createRandomLib() + this->createGradientLib() +
+              this->createCodeForInputs(node) + this->createCodeForProps(node) +
+              "#line 0\n" + node->shaderSource;
+
+    if (!vshader->compileSourceCode(vSource)) {
+        qDebug() << "VERTEX SHADER ERROR";
+        qDebug() << vshader->log();
+    }
+
+    if (!fshader->compileSourceCode(fSource)) {
+        qDebug() << "FRAGMENT SHADER ERROR";
+        qDebug() << fshader->log();
+    }
+
+    // qDebug() << fSource;
+
+    program->removeAllShaders();
+
+    program->addShader(vshader);
+    program->addShader(fshader);
+
+    program->bindAttributeLocation("a_pos", (int)VertexUsage::Position);
+    program->bindAttributeLocation("a_color", (int)VertexUsage::Color);
+    program->bindAttributeLocation("a_texCoord", (int)VertexUsage::TexCoord0);
+
+    if (!program->link()) {
+        qDebug() << "SHADER LINK ERROR";
+        qDebug() << program->log();
+    }
+
+    ctx->doneCurrent();
+
+    return program;
+}
+
+QString TextureRenderer::createRandomLib()
+{
+    return R""""(
+        // this offsets the random start (should be a uniform)
+        uniform float _seed;
+        // this is the starting number for the rng
+        // (should be set from the uv coordinates so it's unique per pixel)
+        vec2 _randomStart;
+
+        // gives a much better distribution at 1
+        #define RANDOM_ITERATIONS 1
+
+        #define HASHSCALE1 443.8975
+        #define HASHSCALE3 vec3(443.897, 441.423, 437.195)
+        #define HASHSCALE4 vec4(443.897, 441.423, 437.195, 444.129)
+
+        //  1 out, 2 in...
+        float hash12(vec2 p)
+        {
+            vec3 p3  = fract(vec3(p.xyx) * HASHSCALE1);
+            p3 += dot(p3, p3.yzx + 19.19);
+            return fract((p3.x + p3.y) * p3.z);
+        }
+
+        ///  2 out, 2 in...
+        vec2 hash22(vec2 p)
+        {
+            vec3 p3 = fract(vec3(p.xyx) * HASHSCALE3);
+            p3 += dot(p3, p3.yzx+19.19);
+            return fract((p3.xx+p3.yz)*p3.zy);
+
+        }
+
+
+        float _rand(vec2 uv)
+        {
+            float a = 0.0;
+            for (int t = 0; t < RANDOM_ITERATIONS; t++)
+            {
+                float v = float(t+1)*.152;
+                // 0.005 is a good value
+                vec2 pos = (uv * v);
+                a += hash12(pos);
+            }
+
+            return a/float(RANDOM_ITERATIONS);
+        }
+
+        vec2 _rand2(vec2 uv)
+        {
+            vec2 a = vec2(0.0);
+            for (int t = 0; t < RANDOM_ITERATIONS; t++)
+            {
+                float v = float(t+1)*.152;
+                // 0.005 is a good value
+                vec2 pos = (uv * v);
+                a += hash22(pos);
+            }
+
+            return a/float(RANDOM_ITERATIONS);
+        }
+
+        float randomFloat(int index) 
+        {
+            return _rand(_randomStart + vec2(_seed) + vec2(index));
+        }
+
+        float randomVec2(int index) 
+        {
+            return _rand(_randomStart + vec2(_seed) + vec2(index));
+        }
+
+        float randomFloat(int index, float start, float end)
+        {
+            float r = _rand(_randomStart + vec2(_seed) + vec2(index));
+            return start + r*(end-start);
+        }
+
+        int randomInt(int index, int start, int end)
+        {
+            float r = _rand(_randomStart + vec2(_seed) + vec2(index));
+            return start + int(r*float(end-start));
+        }
+
+        bool randomBool(int index)
+        {
+            return _rand(_randomStart + vec2(_seed) + vec2(index)) > 0.5;
+        }
+
+        void initRandom()
+        {
+            _randomStart = v_texCoord;
+        }
+        )"""";
+}
+
+QString TextureRenderer::createGradientLib()
+{
+    return R""""(
+        struct Gradient {
+				vec3 colors[GRADIENT_MAX_POINTS];
+				float positions[GRADIENT_MAX_POINTS];
+				int numPoints;
+    };
+        
+    // assumes points are sorted
+    vec3 sampleGradient(vec3 colors[GRADIENT_MAX_POINTS], float positions[GRADIENT_MAX_POINTS], int numPoints, float t)
+    {
+        if (numPoints == 0)
+            return vec3(1,0,0);
+        
+        if (numPoints == 1)
+            return colors[0];
+        
+        // here at least two points are available
+        if (t <= positions[0])
+            return colors[0];
+        
+        int last = numPoints - 1;
+        if (t >= positions[last])
+            return colors[last];
+        
+        // find two points in-between and lerp
+        
+        for(int i = 0; i < numPoints-1;i++) {
+            if (positions[i+1] > t) {
+                vec3 colorA = colors[i];
+                vec3 colorB = colors[i+1];
+                
+                float t1 = positions[i];
+                float t2 = positions[i+1];
+                
+                float lerpPos = (t - t1)/(t2 - t1);
+                return mix(colorA, colorB, lerpPos);
+                
+            }
+            
+        }
+        
+        return vec3(0,0,0);
+    }
+
+    vec3 sampleGradient(Gradient gradient, float t)
+    {
+      return sampleGradient(gradient.colors, gradient.positions, gradient.numPoints, t);
+    }
+        )"""";
+}
+QString TextureRenderer::createCodeForInputs(const TextureNodePtr& node)
+{
+    QString code = "";
+    for (auto input : node->inputs) {
+        code += "uniform sampler2D " + input + ";\n";
+        code += "uniform bool " + input + "_connected;\n";
+    }
+
+    return code;
+}
+
+QString TextureRenderer::createCodeForProps(const TextureNodePtr& node)
+{
+    QString code = "";
+
+    for (auto prop : node->props) {
+        switch (prop->type) {
+        case PropType::Int:
+            code += "uniform int prop_" + prop->name + ";\n";
+            break;
+        case PropType::Float:
+            code += "uniform float prop_" + prop->name + ";\n";
+            break;
+        case PropType::Bool:
+            code += "uniform bool prop_" + prop->name + ";\n";
+            break;
+        case PropType::Enum:
+            code += "uniform int prop_" + prop->name + ";\n";
+            break;
+        case PropType::Color:
+            code += "uniform vec4 prop_" + prop->name + ";\n";
+            break;
+        case PropType::Gradient:
+            code += "uniform int prop_" + prop->name + ";\n";
+            break;
+        }
+    }
+
+    return code + "\n";
+}
\ No newline at end of file
diff --git a/src/texturelab/graphics/texturerenderer.h b/src/texturelab/graphics/texturerenderer.h
new file mode 100644
index 00000000..3bf3eaa7
--- /dev/null
+++ b/src/texturelab/graphics/texturerenderer.h
@@ -0,0 +1,73 @@
+#pragma once
+
+#include <QOpenGLContext>
+#include <QPixmap>
+#include <QSharedPointer>
+
+class QOffscreenSurface;
+class QOpenGLContext;
+class QOpenGLFunctions_3_2_Core;
+class QOpenGLVertexArrayObject;
+class QOpenGLBuffer;
+class QOpenGLShader;
+class QOpenGLShaderProgram;
+class QOpenGLFramebufferObject;
+
+class TextureProject;
+typedef QSharedPointer<TextureProject> TextureProjectPtr;
+class TextureNode;
+typedef QSharedPointer<TextureNode> TextureNodePtr;
+
+struct NodeInput {
+    TextureNodePtr node;
+    QString name;
+};
+
+// https://stackoverflow.com/questions/31323749/easiest-way-for-offscreen-rendering-with-qopenglwidget
+class TextureRenderer : public QObject {
+    Q_OBJECT
+
+    QOffscreenSurface* surface;
+    QOpenGLContext* ctx;
+    QOpenGLFunctions_3_2_Core* gl;
+    QOpenGLVertexArrayObject* vao;
+    QOpenGLBuffer* vbo;
+    QOpenGLShader* vshader;
+    QOpenGLShader* fshader;
+    QOpenGLFramebufferObject* fbo;
+
+public:
+    TextureRenderer();
+    void setup();
+    void setProject(TextureProjectPtr project);
+    void update();
+    void testRendering();
+
+    void initializeNodeGraphicsResources(const TextureNodePtr& node);
+    void renderNode(const TextureNodePtr& node);
+
+    TextureProjectPtr project;
+
+private:
+    QVector<NodeInput> getNodeInputs(const TextureNodePtr& node);
+    TextureNodePtr getNextUpdatableNode() const;
+    QOpenGLShaderProgram* buildShaderForNode(const TextureNodePtr& node);
+    QString createRandomLib();
+    QString createGradientLib();
+    QString createCodeForInputs(const TextureNodePtr& node);
+    QString createCodeForProps(const TextureNodePtr& node);
+signals:
+    void thumbnailGenerated(const QString& nodeId, GLuint texId,
+                            const QPixmap& pixmap);
+};
+
+// note: there's no specified fbo limit
+// https://stackoverflow.com/a/41164761
+class NodeTexture {
+public:
+    // texture id
+    int width;
+    int height;
+
+    QPixmap thumbnail;
+};
\ No newline at end of file
diff --git a/src/texturelab/libraries/library.cpp b/src/texturelab/libraries/library.cpp
new file mode 100644
index 00000000..22edda07
--- /dev/null
+++ b/src/texturelab/libraries/library.cpp
@@ -0,0 +1,186 @@
+#include "library.h"
+#include "../models.h"
+#include "libv1.h"
+#include "libv2.h"
+
+#include <QMap>
+
+TextureNodePtr Library::createNode(QString name)
+{
+    if (this->items.contains(name)) {
+        auto& item = items[name];
+        if (item.name == name) {
+            auto node = item.factoryFunction();
+
+            // todo: put this in the appropriate place
+            node->init();
+
+            return node;
+        }
+    }
+
+    return TextureNodePtr(nullptr);
+}
+
+void Library::addNode(QString name, QString displayName, QString iconPath,
+                      std::function<TextureNodePtr()> factoryFunction)
+{
+
+    LibraryEntry entry;
+    entry.name = name;
+    entry.displayName = displayName;
+    entry.icon = QIcon(iconPath);
+    entry.factoryFunction = factoryFunction;
+
+    items[name] = entry;
+}
+
+bool Library::hasNode(QString name) { return items.contains(name); }
+
+LibraryV1::LibraryV1() : Library()
+{
+    // add items
+}
+
+Library* createLibraryV2()
+{
+    auto lib = new Library();
+    // lib->addNode<PolygonNode>("polygon", "Polygon", ":nodes/bevel.png");
+    lib->addNode<CircleNode>("circle", "Circle", ":nodes/circle.png");
+    lib->addNode<ColorNode>("color", "Color", ":nodes/color.png");
+    lib->addNode<BlendNode>("blend", "Blend", ":nodes/blend.png");
+    lib->addNode<OutputNode>("output", "Output", ":nodes/output.png");
+    lib->addNode<NormalMapNode>("normalmap", "Normal Map",
+                                ":nodes/normalmap.png");
+    lib->addNode<BrickGeneratorNode>("brickgenerator", "Brick Generator",
+                                     ":nodes/brickgenerator.png");
+
+    lib->addNode<BrightnessContrastNode>("brightnesscontrast",
+                                         "Brick Generator",
+                                         ":nodes/brightnesscontrast.png");
+    lib->addNode<CellNode>("cell", "Cell", ":nodes/cell.png");
+    lib->addNode<CheckerboardNode>("checkerboard", "Checkerboard",
+                                   ":nodes/checkerboard.png");
+    lib->addNode<CopyNode>("copy", "Copy", ":nodes/copy.png");
+    // lib->addNode<DirectionalWarpNode>("directionalwarp", "Directional Warp",
+    //                                   ":nodes/directionalwarp.png");
+    lib->addNode<FractalNoiseNode>("fractalnoise", "Fractal Noise",
+                                   ":nodes/fractalnoise.png");
+
+    lib->addNode<GradientNode>("gradient", "Gradient", ":nodes/gradient.png");
+    // lib->addNode<GradientMapNode>("gradientmap", "Gradient Map",
+    //                               ":nodes/gradientmap.png");
+    lib->addNode<HeightShiftNode>("heightshift", "Height Shift",
+                                  ":nodes/heightshift.png");
+    lib->addNode<HexagonNode>("hexagon", "Hexagon", ":nodes/hexagon.png");
+    lib->addNode<InvertNode>("invert", "Invert", ":nodes/invert.png");
+    lib->addNode<LineCellNode>("linecell", "Line Cell", ":nodes/linecell.png");
+    lib->addNode<MapRangeNode>("maprange", "Map Range", ":nodes/maprange.png");
+    lib->addNode<MaskNode>("mask", "Mask", ":nodes/mask.png");
+    lib->addNode<MirrorNode>("mirror", "Mirror", ":nodes/mirror.png");
+    // lib->addNode<BlendNode>("normalmap", "Normal Map",
+    // ":nodes/normalmap.png");
+    lib->addNode<Perlin3DNode>("perlin3d", "Perlin 3D", ":nodes/perlin3d.png");
+    lib->addNode<SolidCellNode>("solidcell", "Solid Cell",
+                                ":nodes/solidcell.png");
+    lib->addNode<SplatNode>("splat", "Splat", ":nodes/splat.png");
+    lib->addNode<ThresholdNode>("threshold", "Threshold",
+                                ":nodes/threshold.png");
+    lib->addNode<TileNode>("tile", "Tile", ":nodes/tile.png");
+    lib->addNode<Transform2DNode>("transform2d", "Transform2D",
+                                  ":nodes/transform2d.png");
+    lib->addNode<WarpNode>("warp", "Warp", ":nodes/warp.png");
+    lib->addNode<WaveNode>("wave", "Wave", ":nodes/wave.png");
+
+    // V2 NODES START HERE
+    lib->addNode<AdvanceSplatterNode>("advancesplatter", "AdvanceSplatter",
+                                      ":nodes/advancesplatter.png");
+    lib->addNode<AnisotropicBlurNode>("anisotropicblur", "Anisotropic Blur",
+                                      ":nodes/anisotropicblur.png");
+    lib->addNode<BevelNode>("bevel", "Bevel", ":nodes/bevel.png");
+    lib->addNode<BlurNodeV2>("blurv2", "Blur", ":nodes/blurv2.png");
+    lib->addNode<CapsuleNode>("capsule", "Capsule", ":nodes/capsule.png");
+    lib->addNode<CartesianToPolarNode>("cartesiantopolar", "Cartesian To Polar",
+                                       ":nodes/cartesiantopolar.png");
+    lib->addNode<CircularSplatterNode>("circularsplatter", "Circular Splatter",
+                                       ":nodes/circularsplatter.png");
+    lib->addNode<ClampNode>("clamp", "Clamp", ":nodes/clamp.png");
+    lib->addNode<CombineNormalsNode>("combinenormals", "Combine Normals",
+                                     ":nodes/combinenormals.png");
+    lib->addNode<DirectionalBlurNode>("directionalblur", "Directional Blur",
+                                      ":nodes/directionalblur.png");
+    lib->addNode<DirectionalWarpV2Node>("directionalwarp", "Directional Warp",
+                                        ":nodes/directionalwarp.png");
+    lib->addNode<ExtractChannelNode>("extractchannel", "Extract Channel",
+                                     ":nodes/extractchannel.png");
+    lib->addNode<FloodFillNode>("floodfill", "Flood Fill",
+                                ":nodes/floodfill.png");
+    lib->addNode<FloodFillSamplerNode>("floodfillsampler", "FloodFill Sampler",
+                                       ":nodes/floodfillsampler.png");
+    lib->addNode<FloodFillToBBoxNode>("floodfilltobbox", "FloodFill to BBox",
+                                      ":nodes/floodfilltobbox.png");
+    lib->addNode<FloodFillToColorNode>("floodfilltocolor", "FloodFill to Color",
+                                       ":nodes/floodfilltocolor.png");
+    lib->addNode<FloodFillToGradientNode>("floodfilltogradient",
+                                          "FloodFill to Gradient",
+                                          ":nodes/floodfilltogradient.png");
+    lib->addNode<FloodFillToRandomColorNode>(
+        "floodfilltorandomcolor", "FloodFill to Random Color",
+        ":nodes/floodfilltorandomcolor.png");
+    lib->addNode<FloodFillToRandomIntensityNode>(
+        "floodfilltorandomintensity", "FloodFill to Random Intensity",
+        ":nodes/floodfilltorandomintensity.png");
+    lib->addNode<GradientDynamicNode>("gradientdynamic", "Gradient Dynamic",
+                                      ":nodes/gradientdynamic.png");
+    lib->addNode<GradientNoiseNode>("gradientnode", "Gradient Noise",
+                                    ":nodes/gradientnoise.png");
+    lib->addNode<GradientNoiseFractalSumNode>(
+        "gradientnoisefractalsum", "Gradient Noise Fractal Sum",
+        ":nodes/gradientnoisefractalsum.png");
+    lib->addNode<GrayscaleNode>("grayscale", "Grayscale",
+                                ":nodes/grayscale.png");
+    lib->addNode<HistogramScanNode>("histogramscan", "Histogram Scan",
+                                    ":nodes/histogramscan.png");
+    lib->addNode<HistogramSelectNode>("histogramselect", "Histogram Select",
+                                      ":nodes/histogramselect.png");
+    lib->addNode<HistogramShiftNode>("histogramshift", "Histogram Shift",
+                                     ":nodes/histogramshift.png");
+    lib->addNode<HslNode>("hsl", "HSL", ":nodes/hsl.png");
+    lib->addNode<HslExtractNode>("hslextract", "HSL Extract",
+                                 ":nodes/hslextract.png");
+    lib->addNode<ImageNode>("image", "Image", ":nodes/image.png");
+    lib->addNode<InvertNormalNode>("invertnormal", "Node",
+                                   ":nodes/invertnormal.png");
+    lib->addNode<NormalMapV2Node>("normalmap", "Normal Map",
+                                  ":nodes/normalmap.png");
+    lib->addNode<PolarToCartesianNode>("polartocartesian", "Polar to Cartesian",
+                                       ":nodes/polartocartesian.png");
+    lib->addNode<PowNode>("pow", "Pow", ":nodes/pow.png");
+    lib->addNode<QuantizeNode>("quantize", "Quantize", ":nodes/quantize.png");
+    lib->addNode<RgbaMergeNode>("rgbamerge", "RGA Merge",
+                                ":nodes/rgbamerge.png");
+    lib->addNode<RgbaShuffleNode>("rgbashuffle", "RGBA Shuffle",
+                                  ":nodes/rgbashuffle.png");
+    lib->addNode<SimplexNoiseV2Node>("simplexnoise", "Simplex Noise",
+                                     ":nodes/simplexnoise.png");
+    lib->addNode<SkewNode>("skew", "Skew", ":nodes/skew.png");
+    lib->addNode<SlopeBlurNode>("slopeblur", "Slope Blur",
+                                ":nodes/slopeblur.png");
+    lib->addNode<SoftFlowerNode>("softflower", "Soft Flower",
+                                 ":nodes/softflower.png");
+    lib->addNode<SplatV2Node>("splat", "Splat", ":nodes/splat.png");
+    lib->addNode<StarNode>("star", "Star", ":nodes/star.png");
+    lib->addNode<StripesNode>("stripes", "Stripes", ":nodes/stripes.png");
+    lib->addNode<TileSamplerNode>("tilesampler", "Tile Sampler",
+                                  ":nodes/tilesampler.png");
+    lib->addNode<Transform2DV2Node>("transform2d", "Transform2D",
+                                    ":nodes/transform2d.png");
+    lib->addNode<ValueNoiseNode>("valuenoise", "Value Noise",
+                                 ":nodes/valuenoise.png");
+    lib->addNode<ValueNoiseFractalSumNode>("valuenoisefractalsum",
+                                           "Value Noise Fractal Sum",
+                                           ":nodes/valuenoisefractalsum.png");
+    lib->addNode<WarpNodeV2>("warp", "Warp", ":nodes/warp.png");
+
+    return lib;
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/library.h b/src/texturelab/libraries/library.h
new file mode 100644
index 00000000..9e159147
--- /dev/null
+++ b/src/texturelab/libraries/library.h
@@ -0,0 +1,49 @@
+#pragma once
+
+#include <QMap>
+#include <QIcon>
+#include <QString>
+#include <functional>
+#include <QSharedPointer>
+
+class TextureNode;
+typedef QSharedPointer<TextureNode> TextureNodePtr;
+
+class LibraryEntry
+{
+public:
+    QString name;
+    QString displayName;
+    QIcon icon;
+    std::function<TextureNodePtr()> factoryFunction;
+};
+
+class Library
+{
+public:
+    QMap<QString, LibraryEntry> items;
+    virtual TextureNodePtr createNode(QString name);
+
+    void addNode(QString name, QString displayName, QString iconPath, std::function<TextureNodePtr()> factoryFunction);
+    bool hasNode(QString name);
+
+    template <typename T>
+    void addNode(QString name,
+                 QString displayName,
+                 QString iconPath)
+    {
+        // https://stackoverflow.com/a/22934960
+        static_assert(std::is_base_of<TextureNode, T>::value, "type parameter of this class must derive from TextureNode");
+
+        this->addNode(name, displayName, iconPath, [=]()
+                      { return TextureNodePtr(new T); });
+    }
+};
+
+Library *createLibraryV2();
+
+class LibraryV1 : public Library
+{
+public:
+    LibraryV1();
+};
\ No newline at end of file
diff --git a/src/texturelab/libraries/libv1.h b/src/texturelab/libraries/libv1.h
new file mode 100644
index 00000000..3060fb48
--- /dev/null
+++ b/src/texturelab/libraries/libv1.h
@@ -0,0 +1,163 @@
+#pragma once
+
+#include "../models.h"
+
+class BlendNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class BrickGeneratorNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class BrightnessContrastNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CellNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CheckerboardNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CircleNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ColorNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CopyNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class DirectionalWarpNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FractalNoiseNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class GradientNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class GradientMapNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class HeightShiftNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class HexagonNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class InvertNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class LineCellNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class MapRangeNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class MaskNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class MirrorNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class NormalMapNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class OutputNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class PolygonNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class Perlin3DNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ShapesNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SimplexNoiseNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SolidCellNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SplatNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ThresholdNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class TileNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class Transform2DNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class WarpNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class WaveNode : public TextureNode {
+public:
+    virtual void init() override;
+};
\ No newline at end of file
diff --git a/src/texturelab/libraries/libv2.h b/src/texturelab/libraries/libv2.h
new file mode 100644
index 00000000..e5bb3b55
--- /dev/null
+++ b/src/texturelab/libraries/libv2.h
@@ -0,0 +1,244 @@
+#pragma once
+
+#include "../models.h"
+
+class AdvanceSplatterNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class AnisotropicBlurNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class BevelNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class BlurNodeV2 : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CapsuleNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CartesianToPolarNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CircularSplatterNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ClampNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class CombineNormalsNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class DirectionalBlurNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class DirectionalWarpV2Node : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ExtractChannelNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FloodFillNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FloodFillSamplerNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FloodFillToBBoxNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FloodFillToColorNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FloodFillToGradientNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FloodFillToRandomColorNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class FloodFillToRandomIntensityNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class GradientDynamicNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class GradientNoiseNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class GradientNoiseFractalSumNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class GrayscaleNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class HistogramScanNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class HistogramSelectNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class HistogramShiftNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+class HslNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class HslExtractNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ImageNode : public TextureNode {
+    ImageProp* imageProp;
+
+public:
+    virtual void init() override;
+};
+
+class InvertNormalNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class NormalMapV2Node : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class PolarToCartesianNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class PowNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class QuantizeNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class RgbaMergeNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class RgbaShuffleNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SimplexNoiseV2Node : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SkewNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SlopeBlurNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SoftFlowerNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class SplatV2Node : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class StarNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class StripesNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class TileSamplerNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class Transform2DV2Node : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ValueNoiseNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class ValueNoiseFractalSumNode : public TextureNode {
+public:
+    virtual void init() override;
+};
+
+class WarpNodeV2 : public TextureNode {
+public:
+    virtual void init() override;
+};
\ No newline at end of file
diff --git a/src/lib/library/v1/blend.ts b/src/texturelab/libraries/v1/blend.cpp
similarity index 78%
rename from src/lib/library/v1/blend.ts
rename to src/texturelab/libraries/v1/blend.cpp
index 97b3263f..4e429bfb 100644
--- a/src/lib/library/v1/blend.ts
+++ b/src/texturelab/libraries/v1/blend.cpp
@@ -1,29 +1,23 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class BlendNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Blend";
+void BlendNode::init()
+{
+    this->title = "Blend";
 
-		this.addInput("colorA"); // foreground
-		this.addInput("colorB"); // background
-		this.addInput("opacity");
+    this->addInput("colorA");
+    this->addInput("colorB");
+    this->addInput("opacity");
 
-		this.addEnumProperty("type", "Type", [
-			"Multiply",
-			"Add",
-			"Subtract",
-			"Divide",
-			//   "Add Sub",
-			"Max",
-			"Min",
-			"Switch",
-			"Overlay",
-			"Screen"
-		]);
-		this.addFloatProperty("opacity", "Opacity", 1.0, 0.0, 1.0, 0.01);
-
-		const source = `
+    this->addEnumProp("type", "Type",
+                      {"Multiply", "Add", "Subtract", "Divide",
+                       //   "Add Sub",
+                       "Max", "Min", "Switch", "Overlay", "Screen"});
+    this->addFloatProp("opacity", "Opacity", 1.0, 0.0, 1.0, 0.01);
 
+    // todo: add props
+    this->setShaderSource(R""""(
         float screen(float fg, float bg) {
             float res = (1.0 - fg) * (1.0 - bg);
             return 1.0 - res;
@@ -77,8 +71,5 @@ export class BlendNode extends GpuDesignerNode {
 
             return col;
         }
-        `;
-
-		this.buildShader(source);
-	}
-}
+        )"""");
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/brickgenerator.cpp b/src/texturelab/libraries/v1/brickgenerator.cpp
new file mode 100644
index 00000000..e4f7ac88
--- /dev/null
+++ b/src/texturelab/libraries/v1/brickgenerator.cpp
@@ -0,0 +1,138 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void BrickGeneratorNode::init()
+{
+    this->title = "Brick Generator";
+
+    this->addIntProp("rows", "Rows", 6, 1, 20, 1);
+    this->addIntProp("columns", "Columns", 6, 1, 20, 1);
+
+    this->addFloatProp("offset", "Offset", 0.5, 0, 1, 0.1);
+
+    // brick size
+    auto sizeProps = this->createGroup("Size");
+    sizeProps->collapsed = false;
+    sizeProps->add(
+        this->addFloatProp("brickWidth", "Brick Width", 0.9, 0, 1, 0.01));
+    sizeProps->add(
+        this->addFloatProp("brickHeight", "Brick Height", 0.9, 0, 1, 0.01));
+
+    // height
+    auto heightProps = this->createGroup("Height");
+    heightProps->collapsed = false;
+    heightProps->add(
+        this->addFloatProp("heightMin", "Height Min", 0.0, 0, 1, 0.05));
+    heightProps->add(
+        this->addFloatProp("heightMax", "Height Max", 1.0, 0, 1, 0.05));
+    heightProps->add(
+        this->addFloatProp("heightBalance", "Height Balance", 1.0, 0, 1, 0.05));
+    heightProps->add(
+        this->addFloatProp("heightVariance", "Height Variance", 0, 0, 1, 0.05));
+
+    auto source = R""""(
+            //vec2 brickSize = vec2(prop_brickWidth, prop_brickHeight);
+            // vec2 tileSize = vec2(prop_rows, prop_columns);
+
+            // float shiftX = 0.5;
+            // float shiftY = 0.0;
+
+            // offset for alternating rows
+            // float offset = prop_offset;
+
+            // HEIGHT FUNCTIONS
+            float
+            calculateHeight(vec2 brickId)
+        {
+            // height
+            float heightMin = prop_heightMin;
+            float heightMax = prop_heightMax;
+            float heightBalance =
+                prop_heightBalance; // threshold that decides whether to use
+                                    // height variance or not
+            float heightVariance =
+                prop_heightVariance; // multiplies the heightMax-heightMin range
+
+            // check whether or not there should be a height range in the first
+            // place
+            float balRand = _rand(vec2(_seed) + brickId * vec2(0.01));
+
+            // if balRand is less than heightBalance it means it qualifies for a
+            // random height. This way if heightBalance is 0 then we only use
+            // the min luminance
+            if (balRand > heightBalance) {
+                return 1.0;
+            }
+
+            // calculate height variance
+            // need to offset brickId to give new random result
+            float randVariance =
+                _rand(vec2(_seed) + (brickId + vec2(1)) * vec2(0.01));
+            randVariance *= heightVariance;
+
+            float range = (heightMax - heightMin);
+            float height = heightMax - range * randVariance;
+
+            return height;
+        }
+
+        // slope
+        // float slopeX;// slope x direction
+        // float slopeY;// slope y direction
+        // float slopeBalance;// threshold that determines whether or not to use
+        // slope float slopeVariation;// decreases the range of the slope
+
+        vec2 is_brick(vec2 pos)
+        {
+            vec2 brickSize = vec2(prop_brickWidth, prop_brickHeight);
+
+            vec2 edgeSize = (vec2(1.0) - brickSize) * vec2(0.5);
+            vec2 brick = vec2(0.0);
+
+            if (pos.x > edgeSize.x && pos.x < (1.0 - edgeSize.x))
+                brick.x = 1.0;
+
+            if (pos.y > edgeSize.y && pos.y < (1.0 - edgeSize.y))
+                brick.y = 1.0;
+
+            return brick;
+        }
+
+        vec4 process(vec2 uv)
+        {
+            vec2 tileSize = vec2(prop_columns, prop_rows);
+            float offset = prop_offset;
+
+            // vec2 pos = uv * vec2(5);
+            vec2 pos = uv * tileSize;
+
+            float xOffset = 0.0;
+            if (fract(pos.y * 0.5) > 0.5) {
+                xOffset = offset;
+            }
+            pos.x += xOffset;
+
+            // a brick's id would be floor(pos)
+            // this gives us its origin
+            // this can act as a random seed for the entire brick
+            vec2 brickId = floor(pos); // - vec2(xOffset, 0);
+
+            // wrap around x
+            if (brickId.x > tileSize.x - 1.0)
+                brickId.x = 0.0;
+
+            // float lum = _rand(vec2(_seed) + brickId * vec2(0.01));
+            // float lum = randomFloat(0);
+            float lum = calculateHeight(brickId);
+            pos = fract(pos);
+
+            // vec2 isBrick = step(pos,vec2(0.95,0.9));
+            vec2 isBrick = is_brick(pos);
+
+            return vec4(vec3(isBrick.x * isBrick.y * lum), 1.0);
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/brightnesscontrast.cpp b/src/texturelab/libraries/v1/brightnesscontrast.cpp
new file mode 100644
index 00000000..c33cf823
--- /dev/null
+++ b/src/texturelab/libraries/v1/brightnesscontrast.cpp
@@ -0,0 +1,30 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void BrightnessContrastNode::init()
+{
+    this->title = "Brightness Contrast";
+
+    this->addInput("image");
+
+    this->addFloatProp("contrast", "Contrast", 0.0, -1, 1, 0.1);
+    this->addFloatProp("brightness", "Brightness", 0.0, -1, 1, 0.1);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 col = texture(image, uv);
+
+            col.rgb += prop_brightness;
+            if (prop_contrast > 0.0)
+                col.rgb = (col.rgb - 0.5) / (1.0 - prop_contrast) + 0.5;
+            else
+                col.rgb = (col.rgb - 0.5) * (1.0 + prop_contrast) + 0.5;
+
+            return col;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/cellnode.ts b/src/texturelab/libraries/v1/cell.cpp
similarity index 78%
rename from src/lib/library/v1/cellnode.ts
rename to src/texturelab/libraries/v1/cell.cpp
index acb56677..30224b74 100644
--- a/src/lib/library/v1/cellnode.ts
+++ b/src/texturelab/libraries/v1/cell.cpp
@@ -1,16 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-// https://thebookofshaders.com/12/
-export class CellNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Cell";
+void CellNode::init()
+{
+    this->title = "Cell";
 
-		this.addIntProperty("scale", "Scale", 5, 0, 256);
-		this.addBoolProperty("invert", "Invert", false);
-		this.addFloatProperty("entropy", "Order", 0, 0, 1, 0.01);
-		this.addFloatProperty("intensity", "Intensity", 1, 0, 2, 0.01);
+    this->addIntProp("scale", "Scale", 5, 0, 256);
+    this->addBoolProp("invert", "Invert", false);
+    this->addFloatProp("entropy", "Order", 0, 0, 1, 0.01);
+    this->addFloatProp("intensity", "Intensity", 1, 0, 2, 0.01);
 
-		const source = `
+    auto source = R""""(
         vec2 random2( vec2 p ) {
             p += vec2(_seed);
             return fract(sin(vec2(dot(p,vec2(127.1,311.7)),dot(p,vec2(269.5,183.3))))*43758.5453);
@@ -62,8 +63,7 @@ export class CellNode extends GpuDesignerNode {
 
             return vec4(vec3(m_dist) * prop_intensity, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/checkerboard.cpp b/src/texturelab/libraries/v1/checkerboard.cpp
new file mode 100644
index 00000000..db590ba7
--- /dev/null
+++ b/src/texturelab/libraries/v1/checkerboard.cpp
@@ -0,0 +1,31 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+#include <QColor>
+
+void CheckerboardNode::init()
+{
+    this->title = "Checkerboard";
+
+    this->addFloatProp("rows", "Rows", 2, 1, 20, 1);
+    this->addFloatProp("columns", "Columns", 2, 1, 20, 1);
+
+    this->addColorProp("color", "Color", QColor());
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            if ((mod(prop_columns*uv.x, 1.0) < 0.5) ^^ (mod(prop_rows*uv.y, 1.0) < 0.5))
+            {
+                return vec4(prop_color.rgb, 1.0);
+            }
+            else
+            {
+                return vec4(1.0, 1.0, 1.0, 1.0);
+            }
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/color.cpp b/src/texturelab/libraries/v1/color.cpp
new file mode 100644
index 00000000..f8a4d935
--- /dev/null
+++ b/src/texturelab/libraries/v1/color.cpp
@@ -0,0 +1,20 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void ColorNode::init()
+{
+    this->title = "Color";
+
+    this->addInput("image");
+
+    // todo: add props
+    this->setShaderSource(R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 prop_color = vec4(1,1,1,1);
+            return texture(image,uv) * prop_color;
+            //return vec4(uv, vec2(0.0,1.0));// * prop_color;
+        }
+        )"""");
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/copy.cpp b/src/texturelab/libraries/v1/copy.cpp
new file mode 100644
index 00000000..c36e6eb2
--- /dev/null
+++ b/src/texturelab/libraries/v1/copy.cpp
@@ -0,0 +1,21 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void CopyNode::init()
+{
+    this->title = "Copy";
+
+    this->addInput("image");
+    this->addStringProp("name", "Name");
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 col = texture(image, uv);
+            return col;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/directionalwarp.cpp b/src/texturelab/libraries/v1/directionalwarp.cpp
new file mode 100644
index 00000000..82f70b2a
--- /dev/null
+++ b/src/texturelab/libraries/v1/directionalwarp.cpp
@@ -0,0 +1,32 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void DirectionalWarpNode::init()
+{
+    this->title = "Directional Warp";
+
+    this->addInput("inputImage");
+    this->addInput("height");
+
+    this->addFloatProp("intensity", "Intensity", 0.1, -0.5, 0.5, 0.01);
+    this->addFloatProp("angle", "Angle", 0.85, 0.0, 3.142, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec2 step = vec2(1.0,1.0)/_textureSize;
+
+            vec2 dir = normalize(vec2(cos(prop_angle), sin(prop_angle)));
+
+            // center point
+            float dist = abs(texture(height, uv).r) - 0.5;
+            
+            vec4 color = texture(inputImage, uv + dir * prop_intensity * dist);
+
+            return color;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/fractalnoise.ts b/src/texturelab/libraries/v1/fractalnoise.cpp
similarity index 78%
rename from src/lib/library/v1/fractalnoise.ts
rename to src/texturelab/libraries/v1/fractalnoise.cpp
index 1a8abdcb..50d659a2 100644
--- a/src/lib/library/v1/fractalnoise.ts
+++ b/src/texturelab/libraries/v1/fractalnoise.cpp
@@ -1,27 +1,22 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-// https://thebookofshaders.com/11/
-export class FractalNoiseNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Fractal Noise";
+void FractalNoiseNode::init()
+{
+    this->title = "Fractal Noise";
 
-		this.addIntProperty("scale", "Scale", 1, 1, 10, 1);
-		this.addIntProperty("scaleX", "X Scale", 1, 1, 15, 1);
-		this.addIntProperty("scaleY", "Y Scale", 1, 1, 15, 1);
-		this.addIntProperty("startBand", "Start Band", 4, 1, 10, 1);
-		this.addIntProperty("endBand", "End Band", 8, 1, 10, 1);
-		this.addFloatProperty("persistence", "Persistence", 0.6, 0.0, 1.0, 0.01);
-		this.addFloatProperty(
-			"persistenceStart",
-			"Persistence Start",
-			1.0,
-			0.0,
-			1.0,
-			0.01
-		);
-		this.addFloatProperty("brightness", "Brightness", 0.5, 0.0, 1.0, 0.01);
+    this->addIntProp("scale", "Scale", 1, 1, 10, 1);
+    this->addIntProp("scaleX", "X Scale", 1, 1, 15, 1);
+    this->addIntProp("scaleY", "Y Scale", 1, 1, 15, 1);
+    this->addIntProp("startBand", "Start Band", 4, 1, 10, 1);
+    this->addIntProp("endBand", "End Band", 8, 1, 10, 1);
+    this->addFloatProp("persistence", "Persistence", 0.6, 0.0, 1.0, 0.01);
+    this->addFloatProp("persistenceStart", "Persistence Start", 1.0, 0.0, 1.0,
+                       0.01);
+    this->addFloatProp("brightness", "Brightness", 0.5, 0.0, 1.0, 0.01);
 
-		const source = `
+    auto source = R""""(
         //
         // GLSL textureless classic 2D noise "cnoise",
         // with an RSL-style periodic variant "pnoise".
@@ -115,8 +110,7 @@ export class FractalNoiseNode extends GpuDesignerNode {
 
           return vec4(vec3(total + prop_brightness),1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/gradient.cpp b/src/texturelab/libraries/v1/gradient.cpp
new file mode 100644
index 00000000..ec5cf1b0
--- /dev/null
+++ b/src/texturelab/libraries/v1/gradient.cpp
@@ -0,0 +1,96 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+#include <QColor>
+#include <QList>
+
+void GradientNode::init()
+{
+    this->title = "Gradient";
+
+    QColor white(255, 255, 255);
+
+    this->addColorProp("colorA", "Color A", QColor(0, 0, 0));
+    this->addFloatProp("posA", "Position A", 0, 0, 1, 0.01);
+    this->addColorProp("colorB", "Color B", white);
+    this->addFloatProp("posB", "Position B", 1, 0, 1, 0.01);
+
+    this->addEnumProp(
+        "mode", "Gradient Direction",
+        {"Left To Right", "Right To Left", "Top To Bottom", "Bottom To Top"});
+
+    auto source = R""""(
+        #define POINTS_MAX 32
+
+        // assumes points are sorted
+        vec3 calcGradient(float t, vec3 colors[POINTS_MAX], float positions[POINTS_MAX], int numPoints)
+        {
+            if (numPoints == 0)
+                return vec3(1,0,0);
+            
+            if (numPoints == 1)
+                return colors[0];
+            
+            // here at least two points are available
+            if (t < positions[0])
+                return colors[0];
+            
+            int last = numPoints - 1;
+            if (t > positions[last])
+                return colors[last];
+            
+            // find two points in-between and lerp
+            
+            for(int i = 0; i < numPoints-1;i++) {
+                if (positions[i+1] > t) {
+                    vec3 colorA = colors[i];
+                    vec3 colorB = colors[i+1];
+                    
+                    float t1 = positions[i];
+                    float t2 = positions[i+1];
+                    
+                    float lerpPos = (t - t1)/(t2 - t1);
+                    return mix(colorA, colorB, lerpPos);
+                    
+                }
+                
+            }
+            
+            return vec3(0,0,0);
+        }
+
+
+        vec4 process(vec2 uv)
+        {
+            float t = 0.0;
+    
+            // left to right
+            if (prop_mode == 0)
+                t = uv.x;
+            // right to left
+            else if (prop_mode == 1)
+                t = 1.0 - uv.x;
+            // top to bottom
+            else if (prop_mode == 2)
+                t = 1.0 - uv.y;
+            // bottom to top
+            else if (prop_mode == 3)
+                t = uv.y;
+
+
+            vec3 colors[POINTS_MAX];
+            colors[0] = prop_colorA.rgb;
+            colors[1] = prop_colorB.rgb;
+            float positions[POINTS_MAX];
+            positions[0] = prop_posA;
+            positions[1] = prop_posB;
+                
+            
+            vec3 col = calcGradient(t, colors, positions, 2);
+            
+            return vec4(col,1.0);
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/gradientmap.cpp b/src/texturelab/libraries/v1/gradientmap.cpp
new file mode 100644
index 00000000..482244a0
--- /dev/null
+++ b/src/texturelab/libraries/v1/gradientmap.cpp
@@ -0,0 +1,30 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+// void GradientMapNode::init()
+// {
+//     this->title = "GradientMap";
+
+//     this->addInput("inputImage");
+
+//     this->addGradientProp("gradient", "Gradient", Gradient::default());
+
+//     auto source = R""""(
+//         float grayscale(vec3 col)
+//         {
+//             return (col.r + col.g + col.b) / 3.0;
+//         }
+
+//         vec4 process(vec2 uv)
+//         {
+//             // grayscale input color
+//             float t = grayscale(texture(inputImage, uv).rgb);
+//             vec3 col = sampleGradient(prop_gradient, t);
+
+//             return vec4(col, 1.0);
+//         }
+//         )"""";
+
+//     this->setShaderSource(source);
+// }
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/heightshift.cpp b/src/texturelab/libraries/v1/heightshift.cpp
new file mode 100644
index 00000000..80880ff6
--- /dev/null
+++ b/src/texturelab/libraries/v1/heightshift.cpp
@@ -0,0 +1,23 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void HeightShiftNode::init()
+{
+    this->title = "Height Shift";
+
+    this->addInput("image");
+
+    this->addFloatProp("shift", "Shift", 0.0, -1.0, 1.0, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 a =  texture(image, uv);
+
+            return a + vec4(vec3(prop_shift), 0.0);
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/hexagon.ts b/src/texturelab/libraries/v1/hexagon.cpp
similarity index 75%
rename from src/lib/library/v1/hexagon.ts
rename to src/texturelab/libraries/v1/hexagon.cpp
index 08382b31..e09d5842 100644
--- a/src/lib/library/v1/hexagon.ts
+++ b/src/texturelab/libraries/v1/hexagon.cpp
@@ -1,15 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class HexagonNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Hexagon";
+void HexagonNode::init()
+{
+    this->title = "Hexagon";
 
-		this.addFloatProperty("scaleX", "X Scale", 3, 1, 32, 1);
-		this.addFloatProperty("scaleY", "Y Scale", 2, 1, 32, 1);
-		this.addFloatProperty("margin", "Margin", 0.9, 0.0, 1.0, 0.01);
-		this.addFloatProperty("gradient", "Gradient", 0, 0, 1.0, 0.01);
+    this->addFloatProp("scaleX", "X Scale", 3, 1, 32, 1);
+    this->addFloatProp("scaleY", "Y Scale", 2, 1, 32, 1);
+    this->addFloatProp("margin", "Margin", 0.9, 0.0, 1.0, 0.01);
+    this->addFloatProp("gradient", "Gradient", 0, 0, 1.0, 0.01);
 
-		const source = `
+    auto source = R""""(
         // https://www.shadertoy.com/view/Xljczw
         
         //todo: cleanup
@@ -51,8 +53,7 @@ export class HexagonNode extends GpuDesignerNode {
             //todo: apply random color using h.zw as color id
             return vec4(vec3(finalDist),1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/invert.cpp b/src/texturelab/libraries/v1/invert.cpp
new file mode 100644
index 00000000..37c0b548
--- /dev/null
+++ b/src/texturelab/libraries/v1/invert.cpp
@@ -0,0 +1,21 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void InvertNode::init()
+{
+    this->title = "Invert";
+
+    this->addInput("color");
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 col = vec4(1.0) - texture(color,uv);
+            col.a = 1.0;
+            return col;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/linecell.ts b/src/texturelab/libraries/v1/linecell.cpp
similarity index 85%
rename from src/lib/library/v1/linecell.ts
rename to src/texturelab/libraries/v1/linecell.cpp
index c60591f3..6cd00244 100644
--- a/src/lib/library/v1/linecell.ts
+++ b/src/texturelab/libraries/v1/linecell.cpp
@@ -1,17 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-// https://thebookofshaders.com/edit.php#12/tissue.frag
-export class LineCellNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Lined Cell";
+void LineCellNode::init()
+{
+    this->title = "Line Cell";
 
-		this.addIntProperty("scale", "Scale", 5, 0, 256);
-		this.addBoolProperty("invert", "Invert", false);
-		this.addFloatProperty("entropy", "Order", 0, 0, 1, 0.01);
-		this.addFloatProperty("intensity", "Intensity", 1, 0, 2, 0.01);
-		this.addFloatProperty("thickness", "Line Thickness", 0.1, 0, 0.2, 0.01);
+    this->addIntProp("scale", "Scale", 5, 0, 256);
+    this->addBoolProp("invert", "Invert", false);
+    this->addFloatProp("entropy", "Order", 0, 0, 1, 0.01);
+    this->addFloatProp("intensity", "Intensity", 1, 0, 2, 0.01);
+    this->addFloatProp("thickness", "Line Thickness", 0.1, 0, 0.2, 0.01);
 
-		const source = `
+    auto source = R""""(
         vec2 random2( vec2 p ) {
             p += vec2(_seed);
             return fract(sin(vec2(dot(p,vec2(127.1,311.7)),dot(p,vec2(269.5,183.3))))*43758.5453);
@@ -104,8 +105,7 @@ export class LineCellNode extends GpuDesignerNode {
 
             return vec4(color * prop_intensity, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/maprange.cpp b/src/texturelab/libraries/v1/maprange.cpp
new file mode 100644
index 00000000..03af7f4f
--- /dev/null
+++ b/src/texturelab/libraries/v1/maprange.cpp
@@ -0,0 +1,33 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void MapRangeNode::init()
+{
+    this->title = "Map Range";
+
+    this->addInput("color");
+
+    this->addFloatProp("in_min", "Input Minimum", 0, 0, 1.0, 0.01);
+    this->addFloatProp("in_max", "Input Maximum", 1, 0, 1.0, 0.01);
+    this->addFloatProp("out_min", "Output Minimum", 0, 0, 1.0, 0.01);
+    this->addFloatProp("out_max", "Output Maximum", 1, 0, 1.0, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 col = texture(color,uv);
+
+            // color range coming in
+            float inDiff = prop_in_max - prop_in_min;
+            col = (col-prop_in_min) / inDiff;
+
+
+            float outDiff = prop_out_max - prop_out_min;
+            col.rgb = prop_out_min + col.rgb * vec3(outDiff);
+            return col;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/mask.ts b/src/texturelab/libraries/v1/mask.cpp
similarity index 51%
rename from src/lib/library/v1/mask.ts
rename to src/texturelab/libraries/v1/mask.cpp
index 6becb9a7..928bd079 100644
--- a/src/lib/library/v1/mask.ts
+++ b/src/texturelab/libraries/v1/mask.cpp
@@ -1,15 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class MaskNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Mask";
+void MaskNode::init()
+{
+    this->title = "Mask";
 
-		this.addInput("textureA");
-		this.addInput("textureB");
-		this.addInput("mask");
+    this->addInput("textureA");
+    this->addInput("textureB");
+    this->addInput("mask");
 
-		const source = `
-        float lum(vec4 col)
+    auto source = R""""(
+       float lum(vec4 col)
         {
             return (col.r + col.g + col.b) / 3.0;
         }
@@ -24,8 +26,7 @@ export class MaskNode extends GpuDesignerNode {
             // lerp
             return a * t + b * (1.0 - t);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/mirror.ts b/src/texturelab/libraries/v1/mirror.cpp
similarity index 62%
rename from src/lib/library/v1/mirror.ts
rename to src/texturelab/libraries/v1/mirror.cpp
index 10aaab53..3bf62c99 100644
--- a/src/lib/library/v1/mirror.ts
+++ b/src/texturelab/libraries/v1/mirror.cpp
@@ -1,22 +1,21 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class MirrorNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Mirror";
+void MirrorNode::init()
+{
+    this->title = "Mirror";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addEnumProperty("mode", "Mirror Mode", [
-			"Left To Right",
-			"Right To Left",
-			"Top To Bottom",
-			"Bottom To Top"
-		]);
-		this.addFloatProperty("offset", "Offset", 0.5, 0, 1, 0.01);
-		this.addBoolProperty("clamp", "Clamp", true);
+    this->addEnumProp(
+        "mode", "Mirror Mode",
+        {"Left To Right", "Right To Left", "Top To Bottom", "Bottom To Top"});
+    this->addFloatProp("offset", "Offset", 0.5, 0, 1, 0.01);
+    this->addBoolProp("clamp", "Clamp", true);
 
-		const source = `
-        vec4 process(vec2 uv)
+    auto source = R""""(
+       vec4 process(vec2 uv)
         {
             // left to right
             if (prop_mode == 0)
@@ -44,8 +43,7 @@ export class MirrorNode extends GpuDesignerNode {
             vec4 col = texture(image, uv);
             return col;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/normalmap.cpp b/src/texturelab/libraries/v1/normalmap.cpp
new file mode 100644
index 00000000..29265d33
--- /dev/null
+++ b/src/texturelab/libraries/v1/normalmap.cpp
@@ -0,0 +1,48 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void NormalMapNode::init()
+{
+    this->title = "Normal Map";
+
+    this->addInput("height");
+
+    this->addFloatProp("strength", "Strength", 1, -2.0, 2.0, 0.05);
+    this->addIntProp("range", "Range", 1, 1, 20, 1);
+    this->addBoolProp("res_ind", "Resolution Independent", false);
+
+    this->setShaderSource(R""""(
+        vec4 process(vec2 uv)
+        {
+            vec2 step = (vec2(1.0, 1.0) / _textureSize) * float(prop_range);
+            if (prop_res_ind)
+                step = (vec2(1.0, 1.0) / 1024.0) * float(prop_range);
+            float strength = prop_strength * 0.1;
+
+            // center point
+            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r) * strength / 2.0;
+
+            // sample horizontally
+            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r) * strength / 2.0;
+            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r) * strength / 2.0;
+
+            // sample vertically
+            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r) * strength / 2.0;
+            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r) * strength / 2.0;
+
+            // find diff horizontally and average
+            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
+
+            // find diff vertically and average
+            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
+
+            vec3 dvx = vec3(step.x, 0.0       , d1-d0);
+            vec3 dvy = vec3(0.0       , step.y, d3-d0);
+            vec3 normal = normalize(cross(dvx, dvy));
+            vec3 final = normal.xyz * 0.5 + 0.5;
+
+            return vec4(final, 1.0);
+        }
+        )"""");
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/output.cpp b/src/texturelab/libraries/v1/output.cpp
new file mode 100644
index 00000000..c52a0c2a
--- /dev/null
+++ b/src/texturelab/libraries/v1/output.cpp
@@ -0,0 +1,50 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void OutputNode::init()
+{
+    this->title = "Output";
+
+    this->addInput("image");
+
+    this->addStringProp("name", "Output Name");
+    this->addEnumProp("components", "Components",
+                      {
+                          "RGBA",
+                          "RGB",
+                          "R",
+                          "G",
+                          "B",
+                          "A",
+                      });
+
+    this->addEnumProp("precision", "Precision",
+                      {
+                          "8 Bits Per Component",
+                          "16 Bits Per Component",
+                      });
+    this->addColorProp("color", "Default Color", QColor(0, 0, 0, 255));
+
+    this->setShaderSource(R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 col;
+            if (image_connected) {
+              col = vec4(0,1,0,1);
+              col = texture(image, uv);
+            //   return texture(image, uv);
+            } else {
+              col = prop_color;
+            //   return prop_color;
+            }
+
+			if(prop_components == 2) col.rgb = vec3(col.r);
+			if(prop_components == 3) col.rgb = vec3(col.g);
+			if(prop_components == 4) col.rgb = vec3(col.b);
+			if(prop_components == 5) col.rgb = vec3(col.a);
+
+            return col;
+        }
+        )"""");
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/perlin3d.cpp b/src/texturelab/libraries/v1/perlin3d.cpp
new file mode 100644
index 00000000..ad9555fb
--- /dev/null
+++ b/src/texturelab/libraries/v1/perlin3d.cpp
@@ -0,0 +1,181 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void Perlin3DNode::init()
+{
+    this->title = "Perlin 3D";
+
+    this->setShaderSource(R""""(
+        vec3 mod289(vec3 x)
+        {
+        return x - floor(x * (1.0 / 289.0)) * 289.0;
+        }
+
+        vec4 mod289(vec4 x)
+        {
+        return x - floor(x * (1.0 / 289.0)) * 289.0;
+        }
+
+        vec4 permute(vec4 x)
+        {
+        return mod289(((x*34.0)+1.0)*x);
+        }
+
+        vec4 taylorInvSqrt(vec4 r)
+        {
+        return 1.79284291400159 - 0.85373472095314 * r;
+        }
+
+        vec3 fade(vec3 t) {
+        return t*t*t*(t*(t*6.0-15.0)+10.0);
+        }
+
+        // Classic Perlin noise
+        float cnoise(vec3 P)
+        {
+        vec3 Pi0 = floor(P); // Integer part for indexing
+        vec3 Pi1 = Pi0 + vec3(1.0); // Integer part + 1
+        Pi0 = mod289(Pi0);
+        Pi1 = mod289(Pi1);
+        vec3 Pf0 = fract(P); // Fractional part for interpolation
+        vec3 Pf1 = Pf0 - vec3(1.0); // Fractional part - 1.0
+        vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
+        vec4 iy = vec4(Pi0.yy, Pi1.yy);
+        vec4 iz0 = Pi0.zzzz;
+        vec4 iz1 = Pi1.zzzz;
+
+        vec4 ixy = permute(permute(ix) + iy);
+        vec4 ixy0 = permute(ixy + iz0);
+        vec4 ixy1 = permute(ixy + iz1);
+
+        vec4 gx0 = ixy0 * (1.0 / 7.0);
+        vec4 gy0 = fract(floor(gx0) * (1.0 / 7.0)) - 0.5;
+        gx0 = fract(gx0);
+        vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);
+        vec4 sz0 = step(gz0, vec4(0.0));
+        gx0 -= sz0 * (step(0.0, gx0) - 0.5);
+        gy0 -= sz0 * (step(0.0, gy0) - 0.5);
+
+        vec4 gx1 = ixy1 * (1.0 / 7.0);
+        vec4 gy1 = fract(floor(gx1) * (1.0 / 7.0)) - 0.5;
+        gx1 = fract(gx1);
+        vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);
+        vec4 sz1 = step(gz1, vec4(0.0));
+        gx1 -= sz1 * (step(0.0, gx1) - 0.5);
+        gy1 -= sz1 * (step(0.0, gy1) - 0.5);
+
+        vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);
+        vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);
+        vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);
+        vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);
+        vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);
+        vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);
+        vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);
+        vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);
+
+        vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
+        g000 *= norm0.x;
+        g010 *= norm0.y;
+        g100 *= norm0.z;
+        g110 *= norm0.w;
+        vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
+        g001 *= norm1.x;
+        g011 *= norm1.y;
+        g101 *= norm1.z;
+        g111 *= norm1.w;
+
+        float n000 = dot(g000, Pf0);
+        float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));
+        float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));
+        float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));
+        float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));
+        float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));
+        float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));
+        float n111 = dot(g111, Pf1);
+
+        vec3 fade_xyz = fade(Pf0);
+        vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);
+        vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);
+        float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x); 
+        return 2.2 * n_xyz;
+        }
+
+        // Classic Perlin noise, periodic variant
+        float pnoise(vec3 P, vec3 rep)
+        {
+        vec3 Pi0 = mod(floor(P), rep); // Integer part, modulo period
+        vec3 Pi1 = mod(Pi0 + vec3(1.0), rep); // Integer part + 1, mod period
+        Pi0 = mod289(Pi0);
+        Pi1 = mod289(Pi1);
+        vec3 Pf0 = fract(P); // Fractional part for interpolation
+        vec3 Pf1 = Pf0 - vec3(1.0); // Fractional part - 1.0
+        vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
+        vec4 iy = vec4(Pi0.yy, Pi1.yy);
+        vec4 iz0 = Pi0.zzzz;
+        vec4 iz1 = Pi1.zzzz;
+
+        vec4 ixy = permute(permute(ix) + iy);
+        vec4 ixy0 = permute(ixy + iz0);
+        vec4 ixy1 = permute(ixy + iz1);
+
+        vec4 gx0 = ixy0 * (1.0 / 7.0);
+        vec4 gy0 = fract(floor(gx0) * (1.0 / 7.0)) - 0.5;
+        gx0 = fract(gx0);
+        vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);
+        vec4 sz0 = step(gz0, vec4(0.0));
+        gx0 -= sz0 * (step(0.0, gx0) - 0.5);
+        gy0 -= sz0 * (step(0.0, gy0) - 0.5);
+
+        vec4 gx1 = ixy1 * (1.0 / 7.0);
+        vec4 gy1 = fract(floor(gx1) * (1.0 / 7.0)) - 0.5;
+        gx1 = fract(gx1);
+        vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);
+        vec4 sz1 = step(gz1, vec4(0.0));
+        gx1 -= sz1 * (step(0.0, gx1) - 0.5);
+        gy1 -= sz1 * (step(0.0, gy1) - 0.5);
+
+        vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);
+        vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);
+        vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);
+        vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);
+        vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);
+        vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);
+        vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);
+        vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);
+
+        vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
+        g000 *= norm0.x;
+        g010 *= norm0.y;
+        g100 *= norm0.z;
+        g110 *= norm0.w;
+        vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
+        g001 *= norm1.x;
+        g011 *= norm1.y;
+        g101 *= norm1.z;
+        g111 *= norm1.w;
+
+        float n000 = dot(g000, Pf0);
+        float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));
+        float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));
+        float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));
+        float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));
+        float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));
+        float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));
+        float n111 = dot(g111, Pf1);
+
+        vec3 fade_xyz = fade(Pf0);
+        vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);
+        vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);
+        float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x); 
+        return 2.2 * n_xyz;
+        }
+
+        vec4 process(vec2 uv)
+        {
+            float c = pnoise(vec3(uv * 10.0,10.0), vec3(10.0,10.0,10.0));
+
+            return vec4(vec3(c), 1.0);
+        }
+        )"""");
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/shapes.ts b/src/texturelab/libraries/v1/shapes.cpp
similarity index 61%
rename from src/lib/library/v1/shapes.ts
rename to src/texturelab/libraries/v1/shapes.cpp
index a6a92f1c..a43b87b2 100644
--- a/src/lib/library/v1/shapes.ts
+++ b/src/texturelab/libraries/v1/shapes.cpp
@@ -1,16 +1,48 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-// https://thebookofshaders.com/07/
-export class PolygonNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Polygon";
+void CircleNode::init()
+{
+    this->title = "Circle";
 
-		this.addFloatProperty("radius", "Radius", 0.7, 0, 3, 0.01);
-		this.addFloatProperty("angle", "Angle", 0, 0.0, 360.0, 1);
-		this.addIntProperty("sides", "Sides", 5, 0, 20, 1);
-		this.addFloatProperty("gradient", "Gradient", 0, 0, 1.0, 0.01);
+    this->addFloatProp("radius", "Radius", 0.2, 0, 1, 0.01);
+    this->addEnumProp("color_gen", "Color Generation",
+                      {"Flat", "Linear", "Exponential"});
 
-		const source = `
+    this->setShaderSource(R""""(
+        vec4 process(vec2 uv)
+        {
+            float dist = distance(uv, vec2(0.5));
+            if( dist <= prop_radius) {
+                if (prop_color_gen==0)
+                    return vec4(vec3(1.0), 1.0);
+                else if (prop_color_gen==1)
+                    return vec4(vec3(1.0 - dist / prop_radius), 1.0);
+                else if (prop_color_gen==2)
+                {
+                    float val = dist / prop_radius;
+                    return vec4(vec3(1.0 - val * val), 1.0);
+                }
+                
+            }
+
+            return vec4(vec3(0.0), 1.0);
+        }
+        )"""");
+}
+
+void PolygonNode::init()
+{
+    this->title = "Polygon";
+
+    this->addFloatProp("radius", "Radius", 0.2, 0, 1, 0.01);
+    this->addFloatProp("angle", "Angle", 0, 0, 360, 0.1);
+    this->addIntProp("sides", "Sides", 5, 0, 20, 1);
+    this->addFloatProp("gradient", "Gradient", 0, 0, 1.0, 0.01);
+
+    // todo: add props
+    this->setShaderSource(R""""(
         #define PI 3.14159265359
         #define TWO_PI 6.28318530718
 
@@ -36,44 +68,5 @@ export class PolygonNode extends GpuDesignerNode {
 
             return vec4(color, 1.0);
         }
-        `;
-
-		this.buildShader(source);
-	}
-}
-
-export class CircleNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Circle";
-
-		this.addFloatProperty("radius", "Radius", 0.4, 0, 1, 0.01);
-		this.addEnumProperty("color_gen", "Color Generation", [
-			"Flat",
-			"Linear",
-			"Exponent"
-		]);
-
-		const source = `
-        vec4 process(vec2 uv)
-        {
-            float dist = distance(uv, vec2(0.5));
-            if( dist <= prop_radius) {
-                if (prop_color_gen==0)
-                    return vec4(vec3(1.0), 1.0);
-                else if (prop_color_gen==1)
-                    return vec4(vec3(1.0 - dist / prop_radius), 1.0);
-                else if (prop_color_gen==2)
-                {
-                    float val = dist / prop_radius;
-                    return vec4(vec3(1.0 - val * val), 1.0);
-                }
-                
-            }
-
-            return vec4(vec3(0.0), 1.0);
-        }
-        `;
-
-		this.buildShader(source);
-	}
-}
+        )"""");
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/simplexnoise.ts b/src/texturelab/libraries/v1/simplexnoise.cpp
similarity index 80%
rename from src/lib/library/v1/simplexnoise.ts
rename to src/texturelab/libraries/v1/simplexnoise.cpp
index 6b779ae3..70bf665b 100644
--- a/src/lib/library/v1/simplexnoise.ts
+++ b/src/texturelab/libraries/v1/simplexnoise.cpp
@@ -1,14 +1,15 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-// https://thebookofshaders.com/11/
-export class SimplexNoiseNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Simplex Noise";
+void SimplexNoiseNode::init()
+{
+    this->title = "Simplex Noise";
 
-		this.addFloatProperty("scale", "Scale", 100, 1, 1000, 0.01);
+    this->addFloatProp("scale", "Scale", 100, 1, 1000, 0.01);
 
-		const source = `
-        float random (in vec2 st) {
+    auto source = R""""(
+       float random (in vec2 st) {
             return fract(sin(dot(st.xy,
                                  vec2(12.9898,78.233)))
                          * 43758.5453123);
@@ -64,8 +65,7 @@ export class SimplexNoiseNode extends GpuDesignerNode {
 
             return vec4(color,1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/solidcell.ts b/src/texturelab/libraries/v1/solidcell.cpp
similarity index 81%
rename from src/lib/library/v1/solidcell.ts
rename to src/texturelab/libraries/v1/solidcell.cpp
index d7bb122f..64ec3024 100644
--- a/src/lib/library/v1/solidcell.ts
+++ b/src/texturelab/libraries/v1/solidcell.cpp
@@ -1,15 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class SolidCellNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Solid Cell";
+void SolidCellNode::init()
+{
+    this->title = "Solid Cell";
 
-		this.addIntProperty("scale", "Scale", 5, 0, 256);
-		this.addBoolProperty("invert", "Invert", false);
-		this.addFloatProperty("entropy", "Order", 0, 0, 1, 0.01);
-		this.addFloatProperty("intensity", "Intensity", 1, 0, 2, 0.01);
+    this->addIntProp("scale", "Scale", 5, 0, 256);
+    this->addBoolProp("invert", "Invert", false);
+    this->addFloatProp("entropy", "Order", 0, 0, 1, 0.01);
+    this->addFloatProp("intensity", "Intensity", 1, 0, 2, 0.01);
 
-		const source = `
+    auto source = R""""(
         vec2 random2( vec2 p ) {
             p += vec2(_seed);
             return fract(sin(vec2(dot(p,vec2(127.1,311.7)),dot(p,vec2(269.5,183.3))))*43758.5453);
@@ -67,8 +69,7 @@ export class SolidCellNode extends GpuDesignerNode {
 
             return vec4(color * prop_intensity, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/splat.ts b/src/texturelab/libraries/v1/splat.cpp
similarity index 92%
rename from src/lib/library/v1/splat.ts
rename to src/texturelab/libraries/v1/splat.cpp
index 362082ef..43fbbaf0 100644
--- a/src/lib/library/v1/splat.ts
+++ b/src/texturelab/libraries/v1/splat.cpp
@@ -1,14 +1,16 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class SplatNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Splat";
+void SplatNode::init()
+{
+    this->title = "Splat";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addIntProperty("count", "Count", 50, 0, 1000, 1);
+    this->addIntProp("count", "Count", 50, 0, 1000, 1);
 
-		const source = `
+    auto source = R""""(
         // https://github.com/glslify/glsl-inverse/blob/master/index.glsl
         // mat3 inverse(mat3 m) {
         //     float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2];
@@ -104,8 +106,7 @@ export class SplatNode extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/threshold.cpp b/src/texturelab/libraries/v1/threshold.cpp
new file mode 100644
index 00000000..e9e6a326
--- /dev/null
+++ b/src/texturelab/libraries/v1/threshold.cpp
@@ -0,0 +1,29 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void ThresholdNode::init()
+{
+    this->title = "Threshold";
+
+    this->addInput("image");
+
+    this->addFloatProp("threshold", "Threshold", 0.0, 0.0, 1.0, 0.01);
+    this->addBoolProp("invert", "Invert", true);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 a =  texture(image, uv);
+
+            if (prop_invert)
+                a.rgb = step(1.0 - prop_threshold, a.rgb);
+            else
+                a.rgb = step(prop_threshold, a.rgb);
+
+            return a;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/tile.ts b/src/texturelab/libraries/v1/tile.cpp
similarity index 72%
rename from src/lib/library/v1/tile.ts
rename to src/texturelab/libraries/v1/tile.cpp
index e5392289..95295778 100644
--- a/src/lib/library/v1/tile.ts
+++ b/src/texturelab/libraries/v1/tile.cpp
@@ -1,21 +1,23 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class TileNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Tile";
+void TileNode::init()
+{
+    this->title = "Tile";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("offset", "Offset", 0.5, 0, 1, 0.1);
+    this->addFloatProp("offset", "Offset", 0.5, 0, 1, 0.1);
 
-		// brick size
-		this.addFloatProperty("brickWidth", "Tile Width", 1.0, 0, 1, 0.01);
-		this.addFloatProperty("brickHeight", "Tile Height", 1.0, 0, 1, 0.01);
+    // brick size
+    this->addFloatProp("brickWidth", "Tile Width", 1.0, 0, 1, 0.01);
+    this->addFloatProp("brickHeight", "Tile Height", 1.0, 0, 1, 0.01);
 
-		this.addFloatProperty("rows", "Rows", 6, 1, 20, 1);
-		this.addFloatProperty("columns", "Columns", 6, 1, 20, 1);
+    this->addFloatProp("rows", "Rows", 6, 1, 20, 1);
+    this->addFloatProp("columns", "Columns", 6, 1, 20, 1);
 
-		const source = `
+    auto source = R""""(
         // offset for alternating rows
             
         vec2 is_brick(vec2 pos)
@@ -64,8 +66,7 @@ export class TileNode extends GpuDesignerNode {
             
             return vec4(col.rgb, isBrick.x * isBrick.y * col.a);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v1/transform2d.ts b/src/texturelab/libraries/v1/transform2d.cpp
similarity index 77%
rename from src/lib/library/v1/transform2d.ts
rename to src/texturelab/libraries/v1/transform2d.cpp
index ae162168..366b0cbf 100644
--- a/src/lib/library/v1/transform2d.ts
+++ b/src/texturelab/libraries/v1/transform2d.cpp
@@ -1,22 +1,24 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
 
-export class Transform2DNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Transform2D";
+void Transform2DNode::init()
+{
+    this->title = "Transform2D";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("translateX", "Translate X", 0, -1.0, 1.0, 0.01);
-		this.addFloatProperty("translateY", "Translate Y", 0, -1.0, 1.0, 0.01);
+    this->addFloatProp("translateX", "Translate X", 0, -1.0, 1.0, 0.01);
+    this->addFloatProp("translateY", "Translate Y", 0, -1.0, 1.0, 0.01);
 
-		this.addFloatProperty("scaleX", "Scale X", 1, -2.0, 2.0, 0.01);
-		this.addFloatProperty("scaleY", "Scale Y", 1, -2.0, 2.0, 0.01);
+    this->addFloatProp("scaleX", "Scale X", 1, -2.0, 2.0, 0.01);
+    this->addFloatProp("scaleY", "Scale Y", 1, -2.0, 2.0, 0.01);
 
-		this.addFloatProperty("rot", "Rotation", 0, 0.0, 360.0, 0.01);
+    this->addFloatProp("rot", "Rotation", 0, 0.0, 360.0, 0.01);
 
-		this.addBoolProperty("clamp", "Clamp", true);
+    this->addBoolProp("clamp", "Clamp", true);
 
-		const source = `
+    auto source = R""""(
         // https://github.com/glslify/glsl-inverse/blob/master/index.glsl
         // mat3 inverse(mat3 m) {
         //     float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2];
@@ -84,8 +86,7 @@ export class Transform2DNode extends GpuDesignerNode {
                 return texture(image, clamp(uv,vec2(0.0), vec2(1.0)));
             return texture(image, uv);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/warp.cpp b/src/texturelab/libraries/v1/warp.cpp
new file mode 100644
index 00000000..0e3ed426
--- /dev/null
+++ b/src/texturelab/libraries/v1/warp.cpp
@@ -0,0 +1,28 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void WarpNode::init()
+{
+    this->title = "Warp";
+
+    this->addInput("inputImage");
+    this->addInput("height");
+
+    this->addFloatProp("intensity", "Intensity", 0.1, -1.0, 1.0, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec2 step = vec2(1.0,1.0)/_textureSize;
+            vec4 warpCol = texture(height, uv);
+            float warp = (warpCol.r + warpCol.g + warpCol.b) / 3.0;
+
+            vec4 color = texture(inputImage, uv + (vec2(warp) - 0.5) * vec2(1.0, -1.0) * prop_intensity);
+
+            return color;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v1/wave.cpp b/src/texturelab/libraries/v1/wave.cpp
new file mode 100644
index 00000000..b3005bca
--- /dev/null
+++ b/src/texturelab/libraries/v1/wave.cpp
@@ -0,0 +1,29 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv1.h"
+
+void WaveNode::init()
+{
+    this->title = "Wave";
+
+    this->addIntProp("xfrequency", "X Frequency", 1, 0, 20, 1);
+    this->addIntProp("yfrequency", "Y Frequency", 0, 0, 20, 1);
+    this->addFloatProp("phase", "Phase Offset", 0.0, 0.0, 3.142, 0.01);
+    this->addFloatProp("amp", "Amplitude", 0.5, 0.0, 1.0, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            float fx = uv.x * 3.142 * 2.0 * float(prop_xfrequency);
+            float fy = uv.y * 3.142 * 2.0 * float(prop_yfrequency);
+            float wave = sin(fx + fy + prop_phase) * prop_amp;
+
+            // bring wave to range 0...1
+            wave = wave * 0.5 + 0.5;
+
+            return vec4(vec3(wave), 1.0);
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/advancesplatter.ts b/src/texturelab/libraries/v2/advancesplatter.cpp
similarity index 89%
rename from src/lib/library/v2/advancesplatter.ts
rename to src/texturelab/libraries/v2/advancesplatter.cpp
index dd336047..036fc4c6 100644
--- a/src/lib/library/v2/advancesplatter.ts
+++ b/src/texturelab/libraries/v2/advancesplatter.cpp
@@ -1,25 +1,27 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class AdvanceSplatterV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Advance Splatter";
+void AdvanceSplatterNode::init()
+{
+    this->title = "Advance Splatter";
 
-		this.addInput("image");
-		this.addInput("mask");
-		this.addInput("size");
-		this.addInput("intensity");
+    this->addInput("image");
+    this->addInput("mask");
+    this->addInput("size");
+    this->addInput("intensity");
 
-		this.addIntProperty("count", "Count", 50, 0, 1000, 1);
-		this.addFloatProperty("rot", "Rotation", 0, 0, 360, 0.1);
+    this->addIntProp("count", "Count", 50, 0, 1000, 1);
+    this->addFloatProp("rot", "Rotation", 0, 0, 360, 0.1);
 
-		this.addFloatProperty("intensityRand", "Random Intensity", 0, 0, 1.0, 0.01);
+    this->addFloatProp("intensityRand", "Random Intensity", 0, 0, 1.0, 0.01);
 
-		this.addFloatProperty("scale", "Scale", 1, 0, 4, 0.1);
-		this.addFloatProperty("scaleRand", "Scale random", 0, 0, 1, 0.1);
+    this->addFloatProp("scale", "Scale", 1, 0, 4, 0.1);
+    this->addFloatProp("scaleRand", "Scale random", 0, 0, 1, 0.1);
 
-		this.addEnumProperty("blendType", "Blend Type", ["Max", "Add"]);
+    this->addEnumProp("blendType", "Blend Type", {"Max", "Add"});
 
-		const source = `
+    auto source = R""""(
         // https://github.com/glslify/glsl-inverse/blob/master/index.glsl
         // mat3 inverse(mat3 m) {
         //     float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2];
@@ -184,8 +186,7 @@ export class AdvanceSplatterV2 extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/anisotropicblur.ts b/src/texturelab/libraries/v2/anisotropicblur.cpp
similarity index 76%
rename from src/lib/library/v2/anisotropicblur.ts
rename to src/texturelab/libraries/v2/anisotropicblur.cpp
index f4d17dc2..796df601 100644
--- a/src/lib/library/v2/anisotropicblur.ts
+++ b/src/texturelab/libraries/v2/anisotropicblur.cpp
@@ -1,20 +1,22 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // uses single pass gaussian
 // https://www.shadertoy.com/view/4tSyzy
 // https://stackoverflow.com/questions/2157920/why-define-pi-4atan1-d0
-export class AnisotropicBlur extends GpuDesignerNode {
-	public init() {
-		this.title = "Anisotropic Blur";
+void AnisotropicBlurNode::init()
+{
+    this->title = "Anisotropic Blur";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("intensity", "Intensity", 2, 0, 10, 0.1);
-		this.addFloatProperty("anisotropy", "Anisotropy", 0.7, 0, 1.0, 0.1);
-		this.addIntProperty("samples", "Samples", 50, 0, 100, 1);
-		this.addFloatProperty("angle", "Angle", 0, 0, 360, 1);
+    this->addFloatProp("intensity", "Intensity", 2, 0, 10, 0.1);
+    this->addFloatProp("anisotropy", "Anisotropy", 0.7, 0, 1.0, 0.1);
+    this->addIntProp("samples", "Samples", 50, 0, 100, 1);
+    this->addFloatProp("angle", "Angle", 0, 0, 360, 1);
 
-		const source = `
+    auto source = R""""(
         #define pow2(x) (x * x)
 
         const float pi = atan(1.0) * 4.0;
@@ -66,8 +68,7 @@ export class AnisotropicBlur extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/bevel.cpp b/src/texturelab/libraries/v2/bevel.cpp
new file mode 100644
index 00000000..79d71d4c
--- /dev/null
+++ b/src/texturelab/libraries/v2/bevel.cpp
@@ -0,0 +1,20 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void BevelNode::init()
+{
+    this->addInput("image");
+
+    // this->distanceProp =
+    this->addFloatProp("distance", "Distance", 50.0, 0.0, 100.0, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 col = texture(image, uv);
+            return col;
+        }
+		)"""";
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/blur.ts b/src/texturelab/libraries/v2/blur.cpp
similarity index 79%
rename from src/lib/library/v2/blur.ts
rename to src/texturelab/libraries/v2/blur.cpp
index 0576250e..7c2e7d78 100644
--- a/src/lib/library/v2/blur.ts
+++ b/src/texturelab/libraries/v2/blur.cpp
@@ -1,18 +1,20 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // uses single pass gaussian
 // https://www.shadertoy.com/view/4tSyzy
 // https://stackoverflow.com/questions/2157920/why-define-pi-4atan1-d0
-export class BlurV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Blur";
+void BlurNodeV2::init()
+{
+    this->title = "Blur";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("intensity", "Intensity", 1, 0, 10, 0.1);
-		this.addIntProperty("samples", "Samples", 50, 0, 100, 1);
+    this->addFloatProp("intensity", "Intensity", 1, 0, 10, 0.1);
+    this->addIntProp("samples", "Samples", 50, 0, 100, 1);
 
-		const source = `
+    auto source = R""""(
         #define pow2(x) (x * x)
 
         const float pi = atan(1.0) * 4.0;
@@ -53,8 +55,7 @@ export class BlurV2 extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/capsule.ts b/src/texturelab/libraries/v2/capsule.cpp
similarity index 66%
rename from src/lib/library/v2/capsule.ts
rename to src/texturelab/libraries/v2/capsule.cpp
index 059f62c5..d1945837 100644
--- a/src/lib/library/v2/capsule.ts
+++ b/src/texturelab/libraries/v2/capsule.cpp
@@ -1,17 +1,19 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://thebookofshaders.com/07/
-export class CapsuleNode extends GpuDesignerNode {
-	public init() {
-		this.title = "Capsule";
+void CapsuleNode::init()
+{
+    this->title = "Capsule";
 
-		this.addFloatProperty("radius", "Radius", 0.2, 0, 1.0, 0.01);
-		this.addFloatProperty("topRadius", "Top Radius", 0.0, 0.0, 0.5, 0.01);
-		this.addFloatProperty("bottomRadius", "Bottom Radius", 0.0, 0, 0.5, 0.01);
-		this.addFloatProperty("length", "Length", 0.6, 0, 2.0, 0.01);
-		this.addFloatProperty("gradient", "Gradient", 0, 0, 1.0, 0.01);
+    this->addFloatProp("radius", "Radius", 0.2, 0, 1.0, 0.01);
+    this->addFloatProp("topRadius", "Top Radius", 0.0, 0.0, 0.5, 0.01);
+    this->addFloatProp("bottomRadius", "Bottom Radius", 0.0, 0, 0.5, 0.01);
+    this->addFloatProp("length", "Length", 0.6, 0, 2.0, 0.01);
+    this->addFloatProp("gradient", "Gradient", 0, 0, 1.0, 0.01);
 
-		const source = `
+    auto source = R""""(
         #define PI 3.14159265359
         #define TWO_PI 6.28318530718
 
@@ -47,8 +49,7 @@ export class CapsuleNode extends GpuDesignerNode {
 
             return vec4(color, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/cartesiantopolar.cpp b/src/texturelab/libraries/v2/cartesiantopolar.cpp
new file mode 100644
index 00000000..6c9fabbc
--- /dev/null
+++ b/src/texturelab/libraries/v2/cartesiantopolar.cpp
@@ -0,0 +1,36 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+// https://www.mathsisfun.com/polar-cartesian-coordinates.html
+void CartesianToPolarNode::init()
+{
+    this->title = "Cartesian To Polar";
+
+    this->addInput("image");
+
+    this->addFloatProp("yscale", "Y Scale", 1.0, 0, 4.0, 0.01);
+    this->addIntProp("xtile", "X Tile", 2, 0, 5, 1);
+    this->addFloatProp("angle_offset", "Angle Offset", 0.0, 0, 360, 1.0);
+    // this->addBoolProp("clamp", "Clamp", false);
+
+    auto source = R""""(
+        const float PI = 3.142;
+        vec4 process(vec2 uv)
+        {
+            vec2 dir = uv - vec2(0.5, 0.5);
+            float y = length(dir) * 2.0 * prop_yscale;
+
+            float x = atan(dir.y, dir.x);
+            x = (x + PI) / (PI * 2.0); // bring to range 0..1
+            x += (prop_angle_offset / 360.0);
+            x = x * float(prop_xtile);
+
+            vec4 col = texture(image, vec2(x, y));
+
+            return col;
+        }
+          )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/lib/library/v2/circularsplatter.ts b/src/texturelab/libraries/v2/circularsplatter.cpp
similarity index 74%
rename from src/lib/library/v2/circularsplatter.ts
rename to src/texturelab/libraries/v2/circularsplatter.cpp
index bd86ab3f..e3179e13 100644
--- a/src/lib/library/v2/circularsplatter.ts
+++ b/src/texturelab/libraries/v2/circularsplatter.cpp
@@ -1,142 +1,75 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class CircularSplatter extends GpuDesignerNode {
-	public init() {
-		this.title = "Circular Splatter";
-
-		this.addInput("image");
-		this.addInput("mask");
-		this.addInput("size");
-		this.addInput("intensity");
-
-		this.addIntProperty("count", "Count", 10, 0, 50, 1);
-		this.addIntProperty("rings", "Rings", 1, 0, 5, 1);
-
-		this.addEnumProperty("blendType", "Blend Type", ["Max", "Add"]);
-
-		this.addFloatProperty("radius", "Radius", 0.3, 0, 1.0, 0.01);
-		this.addFloatProperty("spacing", "Spacing", 1.0, 0, 2.0, 0.01);
-		this.addFloatProperty(
-			"spiralInfluence",
-			"Spiral Influence",
-			0.0,
-			0.0,
-			1.0,
-			0.01
-		);
-		this.addBoolProperty("reverseSpiral", "Reverse Spiral Direction", false);
-
-		// ROTATION
-		const rotProp = this.createGroup("Rotation");
-		rotProp.collapsed = false;
-		rotProp.add(this.addFloatProperty("rot", "Rotation", 0, 0, 360, 0.1));
-		rotProp.add(
-			this.addFloatProperty("rotRand", "Random Rotation", 0.0, 0.0, 1.0, 0.01)
-		);
-		rotProp.add(
-			this.addFloatProperty("ringRot", "Ring Rotation", 0, 0, 360, 0.1)
-		);
-		rotProp.add(
-			this.addFloatProperty(
-				"ringRotRand",
-				"Ring Rotation Random",
-				0.0,
-				0.0,
-				1.0,
-				0.01
-			)
-		);
-		rotProp.add(
-			this.addFloatProperty(
-				"ringRotOffset",
-				"Ring Rotation Offset",
-				0.0,
-				0.0,
-				1.0,
-				0.01
-			)
-		);
-		rotProp.add(
-			this.addBoolProperty("pivotCenter", "Pivot Orientation From Center", true)
-		);
-
-		// INTENSITY
-		const intensityProp = this.createGroup("Intensity");
-		intensityProp.collapsed = false;
-		intensityProp.add(
-			this.addFloatProperty(
-				"intensityRand",
-				"Random Intensity",
-				0,
-				0,
-				1.0,
-				0.01
-			)
-		);
-		intensityProp.add(
-			this.addFloatProperty(
-				"intensityByRing",
-				"Intensity By Ring",
-				0,
-				0,
-				1.0,
-				0.01
-			)
-		);
-		intensityProp.add(
-			this.addBoolProperty(
-				"invertIntensityByRing",
-				"Invert Intensity By Ring",
-				true
-			)
-		);
-		intensityProp.add(
-			this.addFloatProperty(
-				"intensityByAngle",
-				"Intensity By Angle",
-				0,
-				0,
-				1.0,
-				0.01
-			)
-		);
-		intensityProp.add(
-			this.addBoolProperty(
-				"invertIntensityByAngle",
-				"Invert Intensity By Angle",
-				true
-			)
-		);
-
-		// SCALE
-		const scaleProp = this.createGroup("Scale");
-		scaleProp.collapsed = false;
-		scaleProp.add(
-			this.addFloatProperty("inputSize", "Input Size", 0.1, 0, 1, 0.01)
-		);
-		scaleProp.add(this.addFloatProperty("scale", "Scale", 1, 0, 1, 0.01));
-		scaleProp.add(
-			this.addFloatProperty("scaleRand", "Scale random", 0, 0, 1, 0.01)
-		);
-
-		scaleProp.add(
-			this.addFloatProperty("scaleByRing", "Scale By Ring", 0, 0, 1.0, 0.01)
-		);
-		scaleProp.add(
-			this.addBoolProperty("invertScaleByRing", "Scale Intensity By Ring", true)
-		);
-		scaleProp.add(
-			this.addFloatProperty("scaleByAngle", "Scale By Angle", 0, 0, 1.0, 0.01)
-		);
-		scaleProp.add(
-			this.addBoolProperty(
-				"invertScaleByAngle",
-				"Scale Intensity By Angle",
-				true
-			)
-		);
-
-		const source = `
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void CircularSplatterNode::init()
+{
+    this->title = "Circular Splatter";
+
+    this->addInput("image");
+    this->addInput("mask");
+    this->addInput("size");
+    this->addInput("intensity");
+
+    this->addIntProp("count", "Count", 10, 0, 50, 1);
+    this->addIntProp("rings", "Rings", 1, 0, 5, 1);
+
+    this->addEnumProp("blendType", "Blend Type", {"Max", "Add"});
+
+    this->addFloatProp("radius", "Radius", 0.3, 0, 1.0, 0.01);
+    this->addFloatProp("spacing", "Spacing", 1.0, 0, 2.0, 0.01);
+    this->addFloatProp("spiralInfluence", "Spiral Influence", 0.0, 0.0, 1.0,
+                       0.01);
+    this->addBoolProp("reverseSpiral", "Reverse Spiral Direction", false);
+
+    // ROTATION
+    auto rotProp = this->createGroup("Rotation");
+    rotProp->collapsed = false;
+    rotProp->add(this->addFloatProp("rot", "Rotation", 0, 0, 360, 0.1));
+    rotProp->add(
+        this->addFloatProp("rotRand", "Random Rotation", 0.0, 0.0, 1.0, 0.01));
+    rotProp->add(
+        this->addFloatProp("ringRot", "Ring Rotation", 0, 0, 360, 0.1));
+    rotProp->add(this->addFloatProp("ringRotRand", "Ring Rotation Random", 0.0,
+                                    0.0, 1.0, 0.01));
+    rotProp->add(this->addFloatProp("ringRotOffset", "Ring Rotation Offset",
+                                    0.0, 0.0, 1.0, 0.01));
+    rotProp->add(this->addBoolProp("pivotCenter",
+                                   "Pivot Orientation From Center", true));
+
+    // INTENSITY
+    auto intensityProp = this->createGroup("Intensity");
+    intensityProp->collapsed = false;
+    intensityProp->add(this->addFloatProp("intensityRand", "Random Intensity",
+                                          0, 0, 1.0, 0.01));
+    intensityProp->add(this->addFloatProp(
+        "intensityByRing", "Intensity By Ring", 0, 0, 1.0, 0.01));
+    intensityProp->add(this->addBoolProp("invertIntensityByRing",
+                                         "Invert Intensity By Ring", true));
+    intensityProp->add(this->addFloatProp(
+        "intensityByAngle", "Intensity By Angle", 0, 0, 1.0, 0.01));
+    intensityProp->add(this->addBoolProp("invertIntensityByAngle",
+                                         "Invert Intensity By Angle", true));
+
+    // SCALE
+    auto scaleProp = this->createGroup("Scale");
+    scaleProp->collapsed = false;
+    scaleProp->add(
+        this->addFloatProp("inputSize", "Input Size", 0.1, 0, 1, 0.01));
+    scaleProp->add(this->addFloatProp("scale", "Scale", 1, 0, 1, 0.01));
+    scaleProp->add(
+        this->addFloatProp("scaleRand", "Scale random", 0, 0, 1, 0.01));
+
+    scaleProp->add(
+        this->addFloatProp("scaleByRing", "Scale By Ring", 0, 0, 1.0, 0.01));
+    scaleProp->add(this->addBoolProp("invertScaleByRing",
+                                     "Scale Intensity By Ring", true));
+    scaleProp->add(
+        this->addFloatProp("scaleByAngle", "Scale By Angle", 0, 0, 1.0, 0.01));
+    scaleProp->add(this->addBoolProp("invertScaleByAngle",
+                                     "Scale Intensity By Angle", true));
+
+    auto source = R""""(
         mat3 transMat(vec2 t)
         {
             return mat3(vec3(1.0,0.0,0.0), vec3(0.0,1.0,0.0), vec3(t, 1.0));
@@ -361,8 +294,7 @@ export class CircularSplatter extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/clamp.cpp b/src/texturelab/libraries/v2/clamp.cpp
new file mode 100644
index 00000000..f3e02776
--- /dev/null
+++ b/src/texturelab/libraries/v2/clamp.cpp
@@ -0,0 +1,36 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void ClampNode::init()
+{
+    this->title = "Clamp";
+
+    this->addInput("inputImage");
+
+    this->addFloatProp("min", "Minimum", 0, 0, 1.0, 0.01);
+    this->addFloatProp("max", "Maximum", 1, 0, 1.0, 0.01);
+
+    this->addBoolProp("clamp_r", "Clamp R Chanel", true);
+    this->addBoolProp("clamp_g", "Clamp G Chanel", true);
+    this->addBoolProp("clamp_b", "Clamp B Chanel", true);
+    this->addBoolProp("clamp_a", "Clamp A Chanel", false);
+
+    auto source = R""""(
+
+        vec4 process(vec2 uv)
+        {
+            // grayscale input color
+            vec4 col = texture(inputImage,uv);
+
+            if (prop_clamp_r) col.r = clamp(col.r, prop_min, prop_max);
+            if (prop_clamp_g) col.g = clamp(col.g, prop_min, prop_max);
+            if (prop_clamp_b) col.b = clamp(col.b, prop_min, prop_max);
+            if (prop_clamp_a) col.a = clamp(col.a, prop_min, prop_max);
+            
+            return col;
+        }
+          )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/lib/library/v2/combinenormals.ts b/src/texturelab/libraries/v2/combinenormals.cpp
similarity index 70%
rename from src/lib/library/v2/combinenormals.ts
rename to src/texturelab/libraries/v2/combinenormals.cpp
index 44099550..ebada81a 100644
--- a/src/lib/library/v2/combinenormals.ts
+++ b/src/texturelab/libraries/v2/combinenormals.cpp
@@ -1,26 +1,23 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://blog.selfshadow.com/publications/blending-in-detail/
 // https://blog.selfshadow.com/sandbox/normals.html
 // https://www.shadertoy.com/view/4t2SzR
-export class CombineNormals extends GpuDesignerNode {
-	public init() {
-		this.title = "Combine Normals";
+void CombineNormalsNode::init()
+{
+    this->title = "Combine Normals";
 
-		this.addInput("detail");
-		this.addInput("base");
+    this->addInput("detail");
+    this->addInput("base");
 
-		let prop = this.addEnumProperty("technique", "Technique", [
-			"Linear Blending",
-			"Overlay Blending",
-			"Whiteout",
-			"Detail Oriented"
-		]);
-		prop.setValue(3);
+    auto prop = this->addEnumProp(
+        "technique", "Technique",
+        {"Linear Blending", "Overlay Blending", "Whiteout", "Detail Oriented"});
+    prop->setValue(3);
 
-		const source = `
+    auto source = R""""(
 
 		float overlay(float x, float y)
 		{
@@ -70,8 +67,7 @@ export class CombineNormals extends GpuDesignerNode {
             
             return vec4(result, 1.0);
         }
-          `;
+          )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/directionalblur.ts b/src/texturelab/libraries/v2/directionalblur.cpp
similarity index 75%
rename from src/lib/library/v2/directionalblur.ts
rename to src/texturelab/libraries/v2/directionalblur.cpp
index 04901f87..231e0847 100644
--- a/src/lib/library/v2/directionalblur.ts
+++ b/src/texturelab/libraries/v2/directionalblur.cpp
@@ -1,20 +1,22 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // uses single pass gaussian
 // https://www.shadertoy.com/view/4tSyzy
 // https://stackoverflow.com/questions/2157920/why-define-pi-4atan1-d0
-export class DirectionalBlur extends GpuDesignerNode {
-	public init() {
-		this.title = "Directional Blur";
+void DirectionalBlurNode::init()
+{
+    this->title = "Directional Blur";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("intensity", "Intensity", 1, 0, 10, 0.1);
-		this.addIntProperty("samples", "Samples", 50, 0, 100, 1);
-		this.addFloatProperty("angle", "Angle", 0, 0, 360, 1);
-		this.addFloatProperty("balance", "Balance", 0, -1.0, 1.0, 0.1);
+    this->addFloatProp("intensity", "Intensity", 1, 0, 10, 0.1);
+    this->addIntProp("samples", "Samples", 50, 0, 100, 1);
+    this->addFloatProp("angle", "Angle", 0, 0, 360, 1);
+    this->addFloatProp("balance", "Balance", 0, -1.0, 1.0, 0.1);
 
-		const source = `
+    auto source = R""""(
         #define pow2(x) (x * x)
 
         const float pi = atan(1.0) * 4.0;
@@ -61,8 +63,7 @@ export class DirectionalBlur extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/directionalwarpv2.cpp b/src/texturelab/libraries/v2/directionalwarpv2.cpp
new file mode 100644
index 00000000..9d48518a
--- /dev/null
+++ b/src/texturelab/libraries/v2/directionalwarpv2.cpp
@@ -0,0 +1,33 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void DirectionalWarpV2Node::init()
+{
+    this->title = "Directional Warp";
+
+    this->addInput("inputImage");
+    this->addInput("height");
+
+    this->addFloatProp("intensity", "Intensity", 0.1, -0.5, 0.5, 0.01);
+    this->addFloatProp("angle", "Angle", 0, 0, 360, 1);
+
+    // calculates normal, then warps uv by it
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec2 step = vec2(1.0,1.0)/_textureSize;
+
+            vec2 dir = normalize(vec2(cos(radians(prop_angle)), sin(radians(prop_angle))));
+
+            // center point
+            float dist = abs(texture(height, uv).r) - 0.5;
+            
+            vec4 color = texture(inputImage, uv + dir * prop_intensity * dist);
+
+            return color;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/lib/library/v2/extractchannel.ts b/src/texturelab/libraries/v2/extractchannel.cpp
similarity index 54%
rename from src/lib/library/v2/extractchannel.ts
rename to src/texturelab/libraries/v2/extractchannel.cpp
index e0e69c32..2f7eee54 100644
--- a/src/lib/library/v2/extractchannel.ts
+++ b/src/texturelab/libraries/v2/extractchannel.cpp
@@ -1,23 +1,19 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class ExtractChannel extends GpuDesignerNode {
-	public init() {
-		this.title = "Extract Channel";
+void ExtractChannelNode::init()
+{
+    this->title = "Extract Channel";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		// Red
-		let prop = this.addEnumProperty("channel", "Channel", [
-			"Red",
-			"Green",
-			"Blue",
-			"Alpha",
-			"Average (RGB)"
-		]);
+    // Red
+    auto prop =
+        this->addEnumProp("channel", "Channel",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
 
-		const source = `
+    auto source = R""""(
 
 		float getChannel(vec4 inputData, int mode)
 		{
@@ -43,8 +39,7 @@ export class ExtractChannel extends GpuDesignerNode {
             
             return vec4(result);
         }
-          `;
+          )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/floodfill.cpp b/src/texturelab/libraries/v2/floodfill.cpp
new file mode 100644
index 00000000..085a68b5
--- /dev/null
+++ b/src/texturelab/libraries/v2/floodfill.cpp
@@ -0,0 +1,19 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void FloodFillNode::init()
+{
+    this->title = "Copy";
+
+    this->addInput("image");
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 col = texture(image, uv);
+            return col;
+        }
+		)"""";
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/floodfillsampler.ts b/src/texturelab/libraries/v2/floodfillsampler.cpp
similarity index 82%
rename from src/lib/library/v2/floodfillsampler.ts
rename to src/texturelab/libraries/v2/floodfillsampler.cpp
index 499c7873..279c9ac3 100644
--- a/src/lib/library/v2/floodfillsampler.ts
+++ b/src/texturelab/libraries/v2/floodfillsampler.cpp
@@ -1,28 +1,31 @@
-import { Color } from "@/lib/designer/color";
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class FloodFillSampler extends GpuDesignerNode {
-	public init() {
-		this.title = "Flood Fill Sampler";
+#include <QColor>
 
-		this.addInput("floodfill");
-		this.addInput("image");
-		this.addInput("mask");
-		this.addInput("size");
-		this.addInput("intensity");
+void FloodFillSamplerNode::init()
+{
+    this->title = "Flood Fill Sampler";
 
-		this.addFloatProperty("rot", "Rotation", 0, 0, 360, 0.1);
-		this.addFloatProperty("rotRand", "Random Rotation", 0, 0, 1.0, 0.01);
-		this.addFloatProperty("posRand", "Random Position", 0, 0, 1.0, 0.01);
-		this.addFloatProperty("intensityRand", "Random Intensity", 0, 0, 1.0, 0.01);
-		this.addFloatProperty("scale", "Scale", 1, 0, 4, 0.1);
-		this.addFloatProperty("scaleRand", "Scale random", 0, 0, 1, 0.1);
+    this->addInput("floodfill");
+    this->addInput("image");
+    this->addInput("mask");
+    this->addInput("size");
+    this->addInput("intensity");
 
-		this.addIntProperty("precision", "Precision", 2, 1, 3, 1);
+    this->addFloatProp("rot", "Rotation", 0, 0, 360, 0.1);
+    this->addFloatProp("rotRand", "Random Rotation", 0, 0, 1.0, 0.01);
+    this->addFloatProp("posRand", "Random Position", 0, 0, 1.0, 0.01);
+    this->addFloatProp("intensityRand", "Random Intensity", 0, 0, 1.0, 0.01);
+    this->addFloatProp("scale", "Scale", 1, 0, 4, 0.1);
+    this->addFloatProp("scaleRand", "Scale random", 0, 0, 1, 0.1);
 
-		this.addColorProperty("bg", "Background Color", new Color());
+    this->addIntProp("precision", "Precision", 2, 1, 3, 1);
 
-		const source = `
+    this->addColorProp("bg", "Background Color", QColor());
+
+    auto source = R""""(
 
 		mat3 transMat(vec2 t)
         {
@@ -167,8 +170,7 @@ export class FloodFillSampler extends GpuDesignerNode {
 
             return vec4(color * intens, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/floodfilltobbox.ts b/src/texturelab/libraries/v2/floodfilltobbox.cpp
similarity index 66%
rename from src/lib/library/v2/floodfilltobbox.ts
rename to src/texturelab/libraries/v2/floodfilltobbox.cpp
index ba9bb90c..18be1c8e 100644
--- a/src/lib/library/v2/floodfilltobbox.ts
+++ b/src/texturelab/libraries/v2/floodfilltobbox.cpp
@@ -1,20 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class FloodFillToBBox extends GpuDesignerNode {
-	public init() {
-		this.title = "Flood Fill To BBox";
+void FloodFillToBBoxNode::init()
+{
+    this->title = "Flood Fill To BBox";
 
-		this.addInput("floodfill");
+    this->addInput("floodfill");
 
-		this.addEnumProperty("function", "Function", [
-			"max(x,y)",
-			"min(x,y)",
-			"x",
-			"y",
-			"length(x,y)"
-		]);
+    this->addEnumProp("function", "Function",
+                      {"max(x,y)", "min(x,y)", "x", "y", "length(x,y)"});
 
-		const source = `
+    auto source = R""""(
         vec4 process(vec2 uv)
         {
             vec4 pixelData =  texture(floodfill, uv);
@@ -36,8 +33,7 @@ export class FloodFillToBBox extends GpuDesignerNode {
 
             return vec4(vec3(intensity), 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/floodfilltocolor.ts b/src/texturelab/libraries/v2/floodfilltocolor.cpp
similarity index 80%
rename from src/lib/library/v2/floodfilltocolor.ts
rename to src/texturelab/libraries/v2/floodfilltocolor.cpp
index fc979799..005a42fc 100644
--- a/src/lib/library/v2/floodfilltocolor.ts
+++ b/src/texturelab/libraries/v2/floodfilltocolor.cpp
@@ -1,20 +1,20 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class FloodFillToColor extends GpuDesignerNode {
-	public init() {
-		this.title = "Flood Fill To Color";
+void FloodFillToColorNode::init()
+{
+    this->title = "Flood Fill To Color";
 
-		this.addInput("floodfill");
-		this.addInput("color");
+    this->addInput("floodfill");
+    this->addInput("color");
 
-		this.addIntProperty("precision", "Precision", 2, 1, 3, 1);
+    this->addIntProp("precision", "Precision", 2, 1, 3, 1);
 
-		let prop = this.addEnumProperty("source", "Sample Origin", [
-			"Top-Left",
-			"Center"
-		]);
+    auto prop =
+        this->addEnumProp("source", "Sample Origin", {"Top-Left", "Center"});
 
-		const source = `
+    auto source = R""""(
         vec2 calcFloodFillOrigin(vec2 uv, vec4 pixelData)
         {
             //     pixelPos      box width       pixel uv to box
@@ -67,8 +67,7 @@ export class FloodFillToColor extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/floodfilltogradient.ts b/src/texturelab/libraries/v2/floodfilltogradient.cpp
similarity index 84%
rename from src/lib/library/v2/floodfilltogradient.ts
rename to src/texturelab/libraries/v2/floodfilltogradient.cpp
index 8be3f6af..280d5e70 100644
--- a/src/lib/library/v2/floodfilltogradient.ts
+++ b/src/texturelab/libraries/v2/floodfilltogradient.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class FloodFillToGradient extends GpuDesignerNode {
-	public init() {
-		this.title = "Flood Fill To Gradient";
+void FloodFillToGradientNode::init()
+{
+    this->title = "Flood Fill To Gradient";
 
-		this.addInput("floodfill");
+    this->addInput("floodfill");
 
-		this.addFloatProperty("angle", "Angle", 0, 0, 360, 1);
-		this.addFloatProperty("variation", "Angle Variation", 0, 0, 1.0, 0.05);
-		this.addIntProperty("precision", "Precision", 2, 1, 3, 1);
+    this->addFloatProp("angle", "Angle", 0, 0, 360, 1);
+    this->addFloatProp("variation", "Angle Variation", 0, 0, 1.0, 0.05);
+    this->addIntProp("precision", "Precision", 2, 1, 3, 1);
 
-		const source = `
+    auto source = R""""(
         vec2 calcFloodFillOrigin(vec2 uv, vec4 pixelData)
         {
             //     pixelPos      box width       pixel uv to box
@@ -80,8 +82,7 @@ export class FloodFillToGradient extends GpuDesignerNode {
 
             return vec4(vec3(grad), 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/floodfilltorandomcolor.ts b/src/texturelab/libraries/v2/floodfilltorandomcolor.cpp
similarity index 85%
rename from src/lib/library/v2/floodfilltorandomcolor.ts
rename to src/texturelab/libraries/v2/floodfilltorandomcolor.cpp
index 9f3094c1..a92468d7 100644
--- a/src/lib/library/v2/floodfilltorandomcolor.ts
+++ b/src/texturelab/libraries/v2/floodfilltorandomcolor.cpp
@@ -1,13 +1,15 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class FloodFillToRandomColor extends GpuDesignerNode {
-	public init() {
-		this.title = "Flood Fill To Random Color";
+void FloodFillToRandomColorNode::init()
+{
+    this->title = "Flood Fill To Random Color";
 
-		this.addInput("floodfill");
-		this.addIntProperty("precision", "Precision", 2, 1, 3, 1);
+    this->addInput("floodfill");
+    this->addIntProp("precision", "Precision", 2, 1, 3, 1);
 
-		const source = `
+    auto source = R""""(
         vec2 calcFloodFillOrigin(vec2 uv, vec4 pixelData)
         {
             //     pixelPos      box width       pixel uv to box
@@ -59,8 +61,7 @@ export class FloodFillToRandomColor extends GpuDesignerNode {
             return color;
             //return vec4(center.x, center.y, 0.0, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/floodfilltorandomintensity.ts b/src/texturelab/libraries/v2/floodfilltorandomintensity.cpp
similarity index 83%
rename from src/lib/library/v2/floodfilltorandomintensity.ts
rename to src/texturelab/libraries/v2/floodfilltorandomintensity.cpp
index 1c36c0fe..b9a76b3b 100644
--- a/src/lib/library/v2/floodfilltorandomintensity.ts
+++ b/src/texturelab/libraries/v2/floodfilltorandomintensity.cpp
@@ -1,13 +1,15 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class FloodFillToRandomIntensity extends GpuDesignerNode {
-	public init() {
-		this.title = "Flood Fill To Random Intensity";
+void FloodFillToRandomIntensityNode::init()
+{
+    this->title = "Flood Fill To Random Intensity";
 
-		this.addInput("floodfill");
-		this.addIntProperty("precision", "Precision", 2, 1, 3, 1);
+    this->addInput("floodfill");
+    this->addIntProp("precision", "Precision", 2, 1, 3, 1);
 
-		const source = `
+    auto source = R""""(
         vec2 calcFloodFillOrigin(vec2 uv, vec4 pixelData)
         {
             //     pixelPos      box width       pixel uv to box
@@ -55,8 +57,7 @@ export class FloodFillToRandomIntensity extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/gradientdynamic.cpp b/src/texturelab/libraries/v2/gradientdynamic.cpp
new file mode 100644
index 00000000..cd377d04
--- /dev/null
+++ b/src/texturelab/libraries/v2/gradientdynamic.cpp
@@ -0,0 +1,35 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void GradientDynamicNode::init()
+{
+    this->title = "Gradient Dynamic";
+
+    this->addInput("image");
+    this->addInput("gradient");
+
+    this->addFloatProp("position", "Position", 0, 0, 1, 0.01);
+
+    this->addEnumProp("orientation", "Gradient Direction",
+                      {"Vertical", "Horizontal"});
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            float t = 0.0;
+    
+            float intensity = texture(image, uv).r;
+
+            vec4 col = vec4(0);
+            if (prop_orientation == 0)
+                col = texture(gradient, vec2(prop_position, intensity));
+            else
+                col = texture(gradient, vec2(intensity, prop_position));
+            
+            return col;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/gradientnoise.ts b/src/texturelab/libraries/v2/gradientnoise.cpp
similarity index 80%
rename from src/lib/library/v2/gradientnoise.ts
rename to src/texturelab/libraries/v2/gradientnoise.cpp
index 614e2d3d..0a41c62b 100644
--- a/src/lib/library/v2/gradientnoise.ts
+++ b/src/texturelab/libraries/v2/gradientnoise.cpp
@@ -1,15 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.shadertoy.com/view/XdXGW8
-export class GradientNoise extends GpuDesignerNode {
-	public init() {
-		this.title = "Gradient Noise";
+void GradientNoiseNode::init()
+{
+    this->title = "Gradient Noise";
 
-		this.addIntProperty("scale", "Scale", 20, 1, 1000, 1);
-		this.addIntProperty("scaleX", "Scale X", 1, 1, 5, 1);
-		this.addIntProperty("scaleY", "Scale Y", 1, 1, 5, 1);
+    this->addIntProp("scale", "Scale", 20, 1, 1000, 1);
+    this->addIntProp("scaleX", "Scale X", 1, 1, 5, 1);
+    this->addIntProp("scaleY", "Scale Y", 1, 1, 5, 1);
 
-		const source = `
+    auto source = R""""(
         vec2 hash( vec2 x )  // replace this by something better
         {
             const vec2 k = vec2( 0.3183099, 0.3678794 );
@@ -54,8 +56,7 @@ export class GradientNoise extends GpuDesignerNode {
 
             return vec4(color,1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/gradientnoisefractalsum.ts b/src/texturelab/libraries/v2/gradientnoisefractalsum.cpp
similarity index 78%
rename from src/lib/library/v2/gradientnoisefractalsum.ts
rename to src/texturelab/libraries/v2/gradientnoisefractalsum.cpp
index 56094791..a4cff0b1 100644
--- a/src/lib/library/v2/gradientnoisefractalsum.ts
+++ b/src/texturelab/libraries/v2/gradientnoisefractalsum.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.shadertoy.com/view/XdXGW8
-export class GradientNoiseFractalSum extends GpuDesignerNode {
-	public init() {
-		this.title = "Gradient Noise Fractal Sum";
+void GradientNoiseFractalSumNode::init()
+{
+    this->title = "Gradient Noise Fractal Sum";
 
-		this.addIntProperty("scale", "Scale", 8, 1, 100, 1);
-		this.addIntProperty("layers", "Layers", 5, 1, 20, 1);
-		this.addFloatProperty("gain", "Gain", 0.5, 0.1, 2, 0.1);
-		this.addFloatProperty("lacunarity", "Lacunarity", 2.0, 0.1, 2, 0.1);
+    this->addIntProp("scale", "Scale", 8, 1, 100, 1);
+    this->addIntProp("layers", "Layers", 5, 1, 20, 1);
+    this->addFloatProp("gain", "Gain", 0.5, 0.1, 2, 0.1);
+    this->addFloatProp("lacunarity", "Lacunarity", 2.0, 0.1, 2, 0.1);
 
-		const source = `
+    auto source = R""""(
         vec2 hash( vec2 x )  // replace this by something better
         {
             const vec2 k = vec2( 0.3183099, 0.3678794 );
@@ -66,8 +68,7 @@ export class GradientNoiseFractalSum extends GpuDesignerNode {
 
             return vec4(color,1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/grayscale.cpp b/src/texturelab/libraries/v2/grayscale.cpp
new file mode 100644
index 00000000..401fccaa
--- /dev/null
+++ b/src/texturelab/libraries/v2/grayscale.cpp
@@ -0,0 +1,24 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void GrayscaleNode::init()
+{
+    this->title = "Grayscale";
+
+    this->addInput("image");
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            // grayscale input color
+            vec4 col = texture(image, uv);
+			
+			col.rgb = vec3((col.r + col.g + col.b) * 0.3333333);
+
+            return col;
+        }
+          )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/lib/library/v2/histogramscan.ts b/src/texturelab/libraries/v2/histogramscan.cpp
similarity index 69%
rename from src/lib/library/v2/histogramscan.ts
rename to src/texturelab/libraries/v2/histogramscan.cpp
index 97d5fb5e..096badb5 100644
--- a/src/lib/library/v2/histogramscan.ts
+++ b/src/texturelab/libraries/v2/histogramscan.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class HistogramScan extends GpuDesignerNode {
-	public init() {
-		this.title = "Histogram Scan";
+void HistogramScanNode::init()
+{
+    this->title = "Histogram Scan";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("position", "Position", 0.5, 0.0, 1.0, 0.01);
-		this.addFloatProperty("contrast", "Contrast", 0.01, 0.01, 1.0, 0.01);
-		this.addBoolProperty("invert", "Invert", false);
+    this->addFloatProp("position", "Position", 0.5, 0.0, 1.0, 0.01);
+    this->addFloatProp("contrast", "Contrast", 0.01, 0.01, 1.0, 0.01);
+    this->addBoolProp("invert", "Invert", false);
 
-		const source = `
+    auto source = R""""(
         vec4 process(vec2 uv)
         {
             vec4 a =  texture(image, uv);
@@ -27,10 +29,9 @@ export class HistogramScan extends GpuDesignerNode {
             else
                 return vec4(vec3(1.0) - result, a.a);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
 
 // SHADERTOY
diff --git a/src/lib/library/v2/histogramselect.ts b/src/texturelab/libraries/v2/histogramselect.cpp
similarity index 67%
rename from src/lib/library/v2/histogramselect.ts
rename to src/texturelab/libraries/v2/histogramselect.cpp
index d444069f..034a92da 100644
--- a/src/lib/library/v2/histogramselect.ts
+++ b/src/texturelab/libraries/v2/histogramselect.cpp
@@ -1,17 +1,19 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class HistogramSelect extends GpuDesignerNode {
-	public init() {
-		this.title = "Histogram Select";
+void HistogramSelectNode::init()
+{
+    this->title = "Histogram Select";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("position", "Position", 0.5, 0.0, 1.0, 0.01);
-		this.addFloatProperty("range", "Range", 0.1, 0.0, 1.0, 0.01);
-		this.addFloatProperty("contrast", "Contrast", 0.01, 0.01, 1.0, 0.01);
-		this.addBoolProperty("invert", "Invert", false);
+    this->addFloatProp("position", "Position", 0.5, 0.0, 1.0, 0.01);
+    this->addFloatProp("range", "Range", 0.1, 0.0, 1.0, 0.01);
+    this->addFloatProp("contrast", "Contrast", 0.01, 0.01, 1.0, 0.01);
+    this->addBoolProp("invert", "Invert", false);
 
-		const source = `
+    auto source = R""""(
         vec4 process(vec2 uv)
         {
             vec4 a =  texture(image, uv);
@@ -29,10 +31,9 @@ export class HistogramSelect extends GpuDesignerNode {
             else
                 return vec4(vec3(1.0) - result, a.a);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
 
 // SHADERTOY
diff --git a/src/texturelab/libraries/v2/histogramshift.cpp b/src/texturelab/libraries/v2/histogramshift.cpp
new file mode 100644
index 00000000..dc280f4a
--- /dev/null
+++ b/src/texturelab/libraries/v2/histogramshift.cpp
@@ -0,0 +1,26 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void HistogramShiftNode::init()
+{
+    this->title = "Histogram Shift";
+
+    this->addInput("image");
+
+    this->addFloatProp("position", "Position", 0.0, 0.0, 1.0, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 a =  texture(image, uv);
+
+            // shows artifacts for pixels at 1 when position is at 0
+            a.rgb = mod(a.rgb + vec3(prop_position), vec3(1.0));
+
+            return a;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/hsl.ts b/src/texturelab/libraries/v2/hsl.cpp
similarity index 71%
rename from src/lib/library/v2/hsl.ts
rename to src/texturelab/libraries/v2/hsl.cpp
index 5ae514aa..3d8de04c 100644
--- a/src/lib/library/v2/hsl.ts
+++ b/src/texturelab/libraries/v2/hsl.cpp
@@ -1,28 +1,21 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.shadertoy.com/view/XljGzV
 // https://www.rapidtables.com/convert/color/rgb-to-hsl.html
 // https://gist.github.com/yiwenl/745bfea7f04c456e0101
-export class Hsl extends GpuDesignerNode {
-	public init() {
-		this.title = "HSL";
+void HslNode::init()
+{
+    this->title = "HSL";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("hue", "Hue Offset", 0.0, -0.5, 0.5, 0.01);
-		this.addFloatProperty("sat", "Saturation Offset", 0.0, -0.5, 0.5, 0.01);
-		this.addFloatProperty(
-			"lightness",
-			"Lightness Offset",
-			0.0,
-			-0.5,
-			0.5,
-			0.01
-		);
+    this->addFloatProp("hue", "Hue Offset", 0.0, -0.5, 0.5, 0.01);
+    this->addFloatProp("sat", "Saturation Offset", 0.0, -0.5, 0.5, 0.01);
+    this->addFloatProp("lightness", "Lightness Offset", 0.0, -0.5, 0.5, 0.01);
 
-		const source = `
+    auto source = R""""(
 
 		vec3 hsl2rgb( in vec3 c )
 		{
@@ -79,8 +72,7 @@ export class Hsl extends GpuDesignerNode {
             
             return vec4(rgb, 1.0);
         }
-          `;
+          )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/hslextract.ts b/src/texturelab/libraries/v2/hslextract.cpp
similarity index 74%
rename from src/lib/library/v2/hslextract.ts
rename to src/texturelab/libraries/v2/hslextract.cpp
index ed2b8fa0..36752dc1 100644
--- a/src/lib/library/v2/hslextract.ts
+++ b/src/texturelab/libraries/v2/hslextract.cpp
@@ -1,23 +1,20 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.shadertoy.com/view/XljGzV
 // https://www.rapidtables.com/convert/color/rgb-to-hsl.html
 // https://gist.github.com/yiwenl/745bfea7f04c456e0101
-export class HslExtract extends GpuDesignerNode {
-	public init() {
-		this.title = "HSL Extract";
+void HslExtractNode::init()
+{
+    this->title = "HSL Extract";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		let prop = this.addEnumProperty("source", "Source", [
-			"Hue",
-			"Saturation",
-			"Lightness"
-		]);
+    auto prop = this->addEnumProp("source", "Source",
+                                  {"Hue", "Saturation", "Lightness"});
 
-		const source = `
+    auto source = R""""(
 
 		vec3 rgb2hsl( in vec3 c ){
 			float h = 0.0;
@@ -66,8 +63,7 @@ export class HslExtract extends GpuDesignerNode {
             
             return vec4(vec3(result), 1.0);
         }
-          `;
+          )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/texturelab/libraries/v2/imagenode.cpp b/src/texturelab/libraries/v2/imagenode.cpp
new file mode 100644
index 00000000..c510489e
--- /dev/null
+++ b/src/texturelab/libraries/v2/imagenode.cpp
@@ -0,0 +1,10 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void ImageNode::init()
+{
+    this->title = "Image";
+
+    this->imageProp = this->addImageProp("image", "Image");
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v2/invertnormal.cpp b/src/texturelab/libraries/v2/invertnormal.cpp
new file mode 100644
index 00000000..2f80bdd0
--- /dev/null
+++ b/src/texturelab/libraries/v2/invertnormal.cpp
@@ -0,0 +1,33 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void InvertNormalNode::init()
+{
+    this->title = "Invert Normal";
+
+    this->addInput("inputImage");
+
+    this->addBoolProp("invertRed", "Invert Red", false);
+    this->addBoolProp("invertGreen", "Invert Green", true);
+    this->addBoolProp("invertBlue", "Invert Blue", false);
+    this->addBoolProp("invertAlpha", "Invert Alpha", false);
+
+    auto source = R""""(
+
+        vec4 process(vec2 uv)
+        {
+            // grayscale input color
+            vec4 result = texture(inputImage,uv);
+
+			if(prop_invertRed) result.r = 1.0 - result.r;
+			if(prop_invertGreen) result.g = 1.0 - result.g;
+			if(prop_invertBlue) result.b = 1.0 - result.b;
+			if(prop_invertAlpha) result.a = 1.0 - result.a;
+            
+            return result;
+        }
+          )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v2/normalmapv2.cpp b/src/texturelab/libraries/v2/normalmapv2.cpp
new file mode 100644
index 00000000..1fd70b10
--- /dev/null
+++ b/src/texturelab/libraries/v2/normalmapv2.cpp
@@ -0,0 +1,53 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+// http://www.smart-page.net/smartnormal/js/SmartNormalMapFilter.js
+void NormalMapV2Node::init()
+{
+    this->title = "Normal Map";
+    // this.exportName = "result";
+    this->addInput("height");
+
+    // this->addFloatProp("strength", "Strength", 0.02, -0.02, 0.02,
+    // 0.00001);
+    this->addFloatProp("strength", "Strength", 1, -2.0, 2.0, 0.05);
+    this->addIntProp("range", "Range", 1, 1, 20, 1);
+    this->addBoolProp("res_ind", "Resolution Independent", false);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec2 step = (vec2(1.0, 1.0) / _textureSize) * float(prop_range);
+            if (prop_res_ind)
+                step = (vec2(1.0, 1.0) / 1024.0) * float(prop_range);
+            float strength = prop_strength * 0.1;
+
+            // center point
+            float d0 = abs(texture(height, uv + vec2(0.0, 0.0)).r) * strength / 2.0;
+
+            // sample horizontally
+            float d1 = abs(texture(height, uv + vec2(step.x, 0.0)).r) * strength / 2.0;
+            float d2 = abs(texture(height, uv + vec2(-step.x, 0.0)).r) * strength / 2.0;
+
+            // sample vertically
+            float d3 = abs(texture(height, uv + vec2(0.0, step.y)).r) * strength / 2.0;
+            float d4 = abs(texture(height, uv + vec2(0.0, -step.y)).r) * strength / 2.0;
+
+            // find diff horizontally and average
+            float dx = ((d2 - d0) + (d0 - d1)) * 0.5;
+
+            // find diff vertically and average
+            float dy = ((d4 - d0) + (d0 - d3)) * 0.5;
+
+            vec3 dvx = vec3(step.x, 0.0       , d1-d0);
+            vec3 dvy = vec3(0.0       , step.y, d3-d0);
+            vec3 normal = normalize(cross(dvx, dvy));
+            vec3 final = normal.xyz * 0.5 + 0.5;
+
+            return vec4(final, 1.0);
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/polartocartesian.ts b/src/texturelab/libraries/v2/polartocartesian.cpp
similarity index 53%
rename from src/lib/library/v2/polartocartesian.ts
rename to src/texturelab/libraries/v2/polartocartesian.cpp
index 1bc678ad..f45ffe44 100644
--- a/src/lib/library/v2/polartocartesian.ts
+++ b/src/texturelab/libraries/v2/polartocartesian.cpp
@@ -1,24 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-import { Color } from "@/lib/designer/color";
-import { Gradient } from "@/lib/designer/gradient";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.mathsisfun.com/polar-cartesian-coordinates.html
-export class PolarToCartesian extends GpuDesignerNode {
-	public init() {
-		this.title = "Polar To Cartesian";
-
-		this.addInput("image");
-
-		this.addFloatProperty(
-			"angle_offset",
-			"Sample Angle Offset",
-			0.0,
-			0,
-			360,
-			1
-		);
-
-		const source = `
+void PolarToCartesianNode::init()
+{
+    this->title = "Polar To Cartesian";
+
+    this->addInput("image");
+
+    this->addFloatProp("angle_offset", "Sample Angle Offset", 0.0, 0, 360, 1);
+
+    auto source = R""""(
         const float PI = 3.1415926538;
         vec4 process(vec2 uv)
         {
@@ -35,8 +28,7 @@ export class PolarToCartesian extends GpuDesignerNode {
 
             return col;
         }
-          `;
+          )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v2/pow.cpp b/src/texturelab/libraries/v2/pow.cpp
new file mode 100644
index 00000000..4a79092e
--- /dev/null
+++ b/src/texturelab/libraries/v2/pow.cpp
@@ -0,0 +1,24 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void PowNode::init()
+{
+    this->title = "Pow";
+
+    this->addInput("image");
+
+    this->addFloatProp("exponent", "Exponent", 1.0, 0.0, 10.0, 0.01);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 a =  texture(image, uv);
+            a.rgb = pow(a.rgb, vec3(prop_exponent));
+
+            return a;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/texturelab/libraries/v2/quantize.cpp b/src/texturelab/libraries/v2/quantize.cpp
new file mode 100644
index 00000000..5dcf476d
--- /dev/null
+++ b/src/texturelab/libraries/v2/quantize.cpp
@@ -0,0 +1,24 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void QuantizeNode::init()
+{
+    this->title = "Quantize";
+
+    this->addInput("image");
+
+    this->addIntProp("steps", "Steps", 12, 2, 20, 1);
+
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            vec4 a =  texture(image, uv);
+            a.rgb = floor(a.rgb * vec3(float(prop_steps))) / vec3(float(prop_steps));
+
+            return a;
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/texturelab/libraries/v2/rgbamerge.cpp b/src/texturelab/libraries/v2/rgbamerge.cpp
new file mode 100644
index 00000000..4306531d
--- /dev/null
+++ b/src/texturelab/libraries/v2/rgbamerge.cpp
@@ -0,0 +1,76 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void RgbaMergeNode::init()
+{
+    this->title = "RGBA Merge";
+
+    this->addInput("redSource");
+    this->addInput("greenSource");
+    this->addInput("blueSource");
+    this->addInput("alphaSource");
+
+    // Red
+    auto prop =
+        this->addEnumProp("redSource", "Red Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(0);
+
+    // Green
+    prop =
+        this->addEnumProp("greenSource", "Green Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(1);
+
+    // Blue
+    prop =
+        this->addEnumProp("blueSource", "Blue Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(2);
+
+    // Alpha
+    prop =
+        this->addEnumProp("alphaSource", "Alpha Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(3);
+
+    auto source = R""""(
+
+		float getChannel(vec4 inputData, int mode)
+		{
+			if (mode == 0) return inputData.r;
+			if (mode == 1) return inputData.g;
+			if (mode == 2) return inputData.b;
+			if (mode == 3) return inputData.a;
+			if (mode == 4) {
+				return (inputData.r + inputData.g + inputData.b) * 0.3333333;
+			}
+
+			return 0.0;
+		}
+
+        vec4 process(vec2 uv)
+        {
+            // grayscale input color
+            vec4 r = texture(redSource,uv);
+            vec4 g = texture(greenSource,uv);
+            vec4 b = texture(blueSource,uv);
+            vec4 a = texture(alphaSource,uv);
+
+			vec4 result = vec4(0, 0, 0, 1);
+			if (redSource_connected)
+				result.r = getChannel(r, prop_redSource);
+			if (greenSource_connected)
+				result.g = getChannel(g, prop_greenSource);
+			if (blueSource_connected)
+				result.b = getChannel(b, prop_blueSource);
+			if (alphaSource_connected)
+				result.a = getChannel(a, prop_alphaSource);
+            
+            return result;
+        }
+          )"""";
+
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v2/rgbashuffle.cpp b/src/texturelab/libraries/v2/rgbashuffle.cpp
new file mode 100644
index 00000000..e7bc65a9
--- /dev/null
+++ b/src/texturelab/libraries/v2/rgbashuffle.cpp
@@ -0,0 +1,66 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void RgbaShuffleNode::init()
+{
+    this->title = "RGBA Shuffle";
+
+    this->addInput("inputImage");
+
+    // Red
+    auto prop =
+        this->addEnumProp("redSource", "Red Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(0);
+
+    // Green
+    prop =
+        this->addEnumProp("greenSource", "Green Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(1);
+
+    // Blue
+    prop =
+        this->addEnumProp("blueSource", "Blue Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(2);
+
+    // Alpha
+    prop =
+        this->addEnumProp("alphaSource", "Alpha Source",
+                          {"Red", "Green", "Blue", "Alpha", "Average (RGB)"});
+    prop->setValue(3);
+
+    auto source = R""""(
+
+		float getChannel(vec4 inputData, int mode)
+		{
+			if (mode == 0) return inputData.r;
+			if (mode == 1) return inputData.g;
+			if (mode == 2) return inputData.b;
+			if (mode == 3) return inputData.a;
+			if (mode == 4) {
+				return (inputData.r + inputData.g + inputData.b) * 0.3333333;
+			}
+
+			return 0.0;
+		}
+
+        vec4 process(vec2 uv)
+        {
+            // grayscale input color
+            vec4 col = texture(inputImage,uv);
+
+			vec4 result = vec4(0);
+			result.r = getChannel(col, prop_redSource);
+			result.g = getChannel(col, prop_greenSource);
+			result.b = getChannel(col, prop_blueSource);
+			result.a = getChannel(col, prop_alphaSource);
+            
+            return result;
+        }
+          )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/lib/library/v2/simplexnoise.ts b/src/texturelab/libraries/v2/simplexnoisev2.cpp
similarity index 81%
rename from src/lib/library/v2/simplexnoise.ts
rename to src/texturelab/libraries/v2/simplexnoisev2.cpp
index 33b2a00f..efffdcd7 100644
--- a/src/lib/library/v2/simplexnoise.ts
+++ b/src/texturelab/libraries/v2/simplexnoisev2.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.shadertoy.com/view/Msf3WH
 // previous implementation was actually value noise
-export class SimplexNoiseV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Simplex Noise";
+void SimplexNoiseV2Node::init()
+{
+    this->title = "Simplex Noise";
 
-		this.addIntProperty("scale", "Scale", 100, 1, 1000, 1);
-		this.addIntProperty("scaleX", "Scale X", 1, 1, 5, 1);
-		this.addIntProperty("scaleY", "Scale Y", 1, 1, 5, 1);
+    this->addIntProp("scale", "Scale", 100, 1, 1000, 1);
+    this->addIntProp("scaleX", "Scale X", 1, 1, 5, 1);
+    this->addIntProp("scaleY", "Scale Y", 1, 1, 5, 1);
 
-		const source = `
+    auto source = R""""(
         vec2 hash( vec2 x )  // replace this by something better
         {
             const vec2 k = vec2( 0.3183099, 0.3678794 );
@@ -58,8 +60,7 @@ export class SimplexNoiseV2 extends GpuDesignerNode {
 
             return vec4(color,1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/skew.ts b/src/texturelab/libraries/v2/skew.cpp
similarity index 76%
rename from src/lib/library/v2/skew.ts
rename to src/texturelab/libraries/v2/skew.cpp
index 354ba3b9..00b2c9bc 100644
--- a/src/lib/library/v2/skew.ts
+++ b/src/texturelab/libraries/v2/skew.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class Skew extends GpuDesignerNode {
-	public init() {
-		this.title = "Skew";
+void SkewNode::init()
+{
+    this->title = "Skew";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addEnumProperty("axis", "Axis", ["Horizontal", "Vertical"]);
-		this.addFloatProperty("skew", "skew", 0.5, -1.0, 1.0, 0.01);
-		this.addFloatProperty("position", "Position", 0.5, 0.0, 1.0, 0.01);
+    this->addEnumProp("axis", "Axis", {"Horizontal", "Vertical"});
+    this->addFloatProp("skew", "skew", 0.5, -1.0, 1.0, 0.01);
+    this->addFloatProp("position", "Position", 0.5, 0.0, 1.0, 0.01);
 
-		const source = `
+    auto source = R""""(
         vec4 process(vec2 uv)
         {
             float xSkew = 0.0;
@@ -37,10 +39,9 @@ export class Skew extends GpuDesignerNode {
             vec4 col =  texture(image, uv);
             return col;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
 
 // SHADERTOY
diff --git a/src/lib/library/v2/slopeblur.ts b/src/texturelab/libraries/v2/slopeblur.cpp
similarity index 77%
rename from src/lib/library/v2/slopeblur.ts
rename to src/texturelab/libraries/v2/slopeblur.cpp
index 95c8071e..2eef9bf6 100644
--- a/src/lib/library/v2/slopeblur.ts
+++ b/src/texturelab/libraries/v2/slopeblur.cpp
@@ -1,17 +1,19 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // multiple pass warp
-export class SlopeBlur extends GpuDesignerNode {
-	public init() {
-		this.title = "Slope Blur";
+void SlopeBlurNode::init()
+{
+    this->title = "Slope Blur";
 
-		this.addInput("image");
-		this.addInput("slope");
+    this->addInput("image");
+    this->addInput("slope");
 
-		this.addFloatProperty("intensity", "Intensity", 1, 0, 5, 0.1);
-		this.addIntProperty("quality", "Quality", 5, 0, 10, 1);
+    this->addFloatProp("intensity", "Intensity", 1, 0, 5, 0.1);
+    this->addIntProp("quality", "Quality", 5, 0, 10, 1);
 
-		const source = `
+    auto source = R""""(
         vec2 calcSlope(vec2 uv)
         {
             vec3 sl = vec3(0.0,0.0,0.0);
@@ -49,8 +51,7 @@ export class SlopeBlur extends GpuDesignerNode {
 
             return vec4(vec3(final),1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/softflower.ts b/src/texturelab/libraries/v2/softflower.cpp
similarity index 77%
rename from src/lib/library/v2/softflower.ts
rename to src/texturelab/libraries/v2/softflower.cpp
index fdd9f2f5..f61d70de 100644
--- a/src/lib/library/v2/softflower.ts
+++ b/src/texturelab/libraries/v2/softflower.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://thebookofshaders.com/07/
-export class SoftFlower extends GpuDesignerNode {
-	public init() {
-		this.title = "Soft Flower";
+void SoftFlowerNode::init()
+{
+    this->title = "Soft Flower";
 
-		this.addFloatProperty("radius", "Radius", 0.2, 0, 1.0, 0.01);
-		this.addIntProperty("sides", "Sides", 6, 0, 10, 1);
-		this.addFloatProperty("depth", "Depth", 1.0, 0, 1.0, 0.01);
-		this.addFloatProperty("gradient", "Gradient", 0.1, 0, 1.0, 0.01);
+    this->addFloatProp("radius", "Radius", 0.2, 0, 1.0, 0.01);
+    this->addIntProp("sides", "Sides", 6, 0, 10, 1);
+    this->addFloatProp("depth", "Depth", 1.0, 0, 1.0, 0.01);
+    this->addFloatProp("gradient", "Gradient", 0.1, 0, 1.0, 0.01);
 
-		const source = `
+    auto source = R""""(
         #define PI 3.14159265359
         #define TWO_PI 6.28318530718
 
@@ -56,8 +58,7 @@ export class SoftFlower extends GpuDesignerNode {
 
             return vec4(color, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/splat.ts b/src/texturelab/libraries/v2/splatv2.cpp
similarity index 92%
rename from src/lib/library/v2/splat.ts
rename to src/texturelab/libraries/v2/splatv2.cpp
index 4bee9b3c..f3ab9a17 100644
--- a/src/lib/library/v2/splat.ts
+++ b/src/texturelab/libraries/v2/splatv2.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class SplatNodeV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Splat";
+void SplatV2Node::init()
+{
+    this->title = "Splat";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addIntProperty("count", "Count", 50, 0, 1000, 1);
+    this->addIntProp("count", "Count", 50, 0, 1000, 1);
 
-		this.addEnumProperty("blendType", "Blend Type", ["Max", "Add"]);
+    this->addEnumProp("blendType", "Blend Type", {"Max", "Add"});
 
-		const source = `
+    auto source = R""""(
         // https://github.com/glslify/glsl-inverse/blob/master/index.glsl
         // mat3 inverse(mat3 m) {
         //     float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2];
@@ -127,8 +129,7 @@ export class SplatNodeV2 extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/star.ts b/src/texturelab/libraries/v2/star.cpp
similarity index 77%
rename from src/lib/library/v2/star.ts
rename to src/texturelab/libraries/v2/star.cpp
index 71983ae6..5bc6bd06 100644
--- a/src/lib/library/v2/star.ts
+++ b/src/texturelab/libraries/v2/star.cpp
@@ -1,17 +1,19 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://thebookofshaders.com/07/
-export class Star extends GpuDesignerNode {
-	public init() {
-		this.title = "Star";
+void StarNode::init()
+{
+    this->title = "Star";
 
-		this.addFloatProperty("radius", "Radius", 0.2, 0, 0.5, 0.01);
-		this.addIntProperty("sides", "Sides", 5, 3, 20, 1);
-		this.addFloatProperty("depth", "Depth", 0.5, 0, 1.0, 0.01);
-		this.addBoolProperty("antialias", "Anti-Alias", true);
-		// this.addFloatProperty("gradient", "Gradient", 0.1, 0, 1.0, 0.01);
+    this->addFloatProp("radius", "Radius", 0.2, 0, 0.5, 0.01);
+    this->addIntProp("sides", "Sides", 5, 3, 20, 1);
+    this->addFloatProp("depth", "Depth", 0.5, 0, 1.0, 0.01);
+    this->addBoolProp("antialias", "Anti-Alias", true);
+    // this->addFloatProp("gradient", "Gradient", 0.1, 0, 1.0, 0.01);
 
-		const source = `
+    auto source = R""""(
         #define PI 3.14159265359
         #define TWO_PI 6.28318530718
 
@@ -64,8 +66,7 @@ export class Star extends GpuDesignerNode {
 
             return vec4(color, 1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/libraries/v2/stripes.cpp b/src/texturelab/libraries/v2/stripes.cpp
new file mode 100644
index 00000000..244a0946
--- /dev/null
+++ b/src/texturelab/libraries/v2/stripes.cpp
@@ -0,0 +1,30 @@
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void StripesNode::init()
+{
+    this->title = "Stripes";
+
+    this->addIntProp("stripes", "Stripes", 10, 0, 30, 1);
+    this->addIntProp("shift", "Shift", 0, 0, 30, 1);
+    this->addFloatProp("width", "Width", 0.5, 0.0, 1.0, 0.01);
+
+    // calculates normal, then warps uv by it
+    auto source = R""""(
+        vec4 process(vec2 uv)
+        {
+            float fx = uv.x * 3.142 * 2.0 * float(prop_stripes);
+            float fy = uv.y * 3.142 * 2.0 * float(prop_shift);
+            float wave = sin(fx + fy);
+
+            // bring wave to range 0...1
+            wave = wave * 0.5 + 0.5;
+            wave = step(prop_width, wave);
+
+            return vec4(vec3(wave), 1.0);
+        }
+        )"""";
+
+    this->setShaderSource(source);
+}
diff --git a/src/lib/library/v2/tilesampler.ts b/src/texturelab/libraries/v2/tilesampler.cpp
similarity index 81%
rename from src/lib/library/v2/tilesampler.ts
rename to src/texturelab/libraries/v2/tilesampler.cpp
index 59a7cc92..99f77d09 100644
--- a/src/lib/library/v2/tilesampler.ts
+++ b/src/texturelab/libraries/v2/tilesampler.cpp
@@ -1,69 +1,49 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
-
-export class TileSampler extends GpuDesignerNode {
-	public init() {
-		this.title = "Tile Sampler";
-
-		this.addInput("image");
-		this.addInput("mask");
-		this.addInput("size");
-		this.addInput("intensity");
-		this.addInput("vector");
-
-		this.addEnumProperty("blendType", "Blend Type", ["Max", "Add"]);
-
-		this.addIntProperty("rows", "Row Count", 8, 0, 15, 1);
-		this.addIntProperty("columns", "Column Count", 8, 0, 15, 1);
-
-		const posProps = this.createGroup("Position");
-		posProps.add(this.addFloatProperty("offset", "Offset", 0.5, 0, 1, 0.1));
-		posProps.add(
-			this.addEnumProperty("offset_axis", "Offset Axis", ["X Axis", "Y Axis"])
-		);
-		posProps.add(
-			this.addIntProperty("offset_interval", "Offset Interval", 1, 1, 5, 1)
-		);
-
-		const rotProps = this.createGroup("Rotation");
-		rotProps.add(this.addFloatProperty("rot", "Rotation", 0, 0, 360, 0.1));
-		rotProps.add(
-			this.addFloatProperty("rotRand", "Random Rotation", 0, 0, 1.0, 0.01)
-		);
-		rotProps.add(
-			this.addFloatProperty("posRand", "Random Position", 0, 0, 1.0, 0.01)
-		);
-		rotProps.add(
-			this.addFloatProperty(
-				"intensityRand",
-				"Random Intensity",
-				0,
-				0,
-				1.0,
-				0.01
-			)
-		);
-
-		rotProps.add(
-			this.addFloatProperty(
-				"vector_influence",
-				"Vector Rotation Influence",
-				1,
-				0,
-				1,
-				0.1
-			)
-		);
-
-		const scaleProps = this.createGroup("Scale");
-		scaleProps.add(
-			this.addEnumProperty("sizeMode", "Size Mode", ["Normal", "Keep Aspect"])
-		);
-		scaleProps.add(this.addFloatProperty("scale", "Scale", 1, 0, 4, 0.1));
-		scaleProps.add(
-			this.addFloatProperty("scaleRand", "Scale random", 0, 0, 1, 0.1)
-		);
-
-		const source = `
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
+
+void TileSamplerNode::init()
+{
+    this->title = "Tile Sampler";
+
+    this->addInput("image");
+    this->addInput("mask");
+    this->addInput("size");
+    this->addInput("intensity");
+    this->addInput("vector");
+
+    this->addEnumProp("blendType", "Blend Type", {"Max", "Add"});
+
+    this->addIntProp("rows", "Row Count", 8, 0, 15, 1);
+    this->addIntProp("columns", "Column Count", 8, 0, 15, 1);
+
+    auto posProps = this->createGroup("Position");
+    posProps->add(this->addFloatProp("offset", "Offset", 0.5, 0, 1, 0.1));
+    posProps->add(
+        this->addEnumProp("offset_axis", "Offset Axis", {"X Axis", "Y Axis"}));
+    posProps->add(
+        this->addIntProp("offset_interval", "Offset Interval", 1, 1, 5, 1));
+
+    auto rotProps = this->createGroup("Rotation");
+    rotProps->add(this->addFloatProp("rot", "Rotation", 0, 0, 360, 0.1));
+    rotProps->add(
+        this->addFloatProp("rotRand", "Random Rotation", 0, 0, 1.0, 0.01));
+    rotProps->add(
+        this->addFloatProp("posRand", "Random Position", 0, 0, 1.0, 0.01));
+    rotProps->add(this->addFloatProp("intensityRand", "Random Intensity", 0, 0,
+                                     1.0, 0.01));
+
+    rotProps->add(this->addFloatProp(
+        "vector_influence", "Vector Rotation Influence", 1, 0, 1, 0.1));
+
+    auto scaleProps = this->createGroup("Scale");
+    scaleProps->add(
+        this->addEnumProp("sizeMode", "Size Mode", {"Normal", "Keep Aspect"}));
+    scaleProps->add(this->addFloatProp("scale", "Scale", 1, 0, 4, 0.1));
+    scaleProps->add(
+        this->addFloatProp("scaleRand", "Scale random", 0, 0, 1, 0.1));
+
+    auto source = R""""(
 
         mat3 transMat(vec2 t)
         {
@@ -248,8 +228,7 @@ export class TileSampler extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/transform2dv2.ts b/src/texturelab/libraries/v2/transform2dv2.cpp
similarity index 76%
rename from src/lib/library/v2/transform2dv2.ts
rename to src/texturelab/libraries/v2/transform2dv2.cpp
index 2b654930..8872fa0f 100644
--- a/src/lib/library/v2/transform2dv2.ts
+++ b/src/texturelab/libraries/v2/transform2dv2.cpp
@@ -1,23 +1,25 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class Transform2DNodeV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Transform2D";
+void Transform2DV2Node::init()
+{
+    this->title = "Transform2D";
 
-		this.addInput("image");
+    this->addInput("image");
 
-		this.addFloatProperty("translateX", "Translate X", 0, -1.0, 1.0, 0.01);
-		this.addFloatProperty("translateY", "Translate Y", 0, -1.0, 1.0, 0.01);
+    this->addFloatProp("translateX", "Translate X", 0, -1.0, 1.0, 0.01);
+    this->addFloatProp("translateY", "Translate Y", 0, -1.0, 1.0, 0.01);
 
-		this.addFloatProperty("scale", "Scale", 1, 0.0, 2.0, 0.01);
-		this.addFloatProperty("scaleX", "Scale X", 1, -2.0, 2.0, 0.01);
-		this.addFloatProperty("scaleY", "Scale Y", 1, -2.0, 2.0, 0.01);
+    this->addFloatProp("scale", "Scale", 1, 0.0, 2.0, 0.01);
+    this->addFloatProp("scaleX", "Scale X", 1, -2.0, 2.0, 0.01);
+    this->addFloatProp("scaleY", "Scale Y", 1, -2.0, 2.0, 0.01);
 
-		this.addFloatProperty("rot", "Rotation", 0, 0.0, 360.0, 0.01);
+    this->addFloatProp("rot", "Rotation", 0, 0.0, 360.0, 0.01);
 
-		this.addBoolProperty("clamp", "Clamp", true);
+    this->addBoolProp("clamp", "Clamp", true);
 
-		const source = `
+    auto source = R""""(
         // https://github.com/glslify/glsl-inverse/blob/master/index.glsl
         // mat3 inverse(mat3 m) {
         //     float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2];
@@ -85,8 +87,7 @@ export class Transform2DNodeV2 extends GpuDesignerNode {
                 return texture(image, clamp(uv,vec2(0.0), vec2(1.0)));
             return texture(image, uv);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/valuenoise.ts b/src/texturelab/libraries/v2/valuenoise.cpp
similarity index 74%
rename from src/lib/library/v2/valuenoise.ts
rename to src/texturelab/libraries/v2/valuenoise.cpp
index 61bc421a..b5a439dd 100644
--- a/src/lib/library/v2/valuenoise.ts
+++ b/src/texturelab/libraries/v2/valuenoise.cpp
@@ -1,15 +1,17 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.shadertoy.com/view/lsf3WH
-export class ValueNoise extends GpuDesignerNode {
-	public init() {
-		this.title = "Value Noise";
+void ValueNoiseNode::init()
+{
+    this->title = "Value Noise";
 
-		this.addIntProperty("scale", "Scale", 100, 1, 1000, 1);
-		this.addIntProperty("scaleX", "Scale X", 1, 1, 5, 1);
-		this.addIntProperty("scaleY", "Scale Y", 1, 1, 5, 1);
+    this->addIntProp("scale", "Scale", 100, 1, 1000, 1);
+    this->addIntProp("scaleX", "Scale X", 1, 1, 5, 1);
+    this->addIntProp("scaleY", "Scale Y", 1, 1, 5, 1);
 
-		const source = `
+    auto source = R""""(
         float wrapAround(float value, float upperBound) {
             return mod((value + upperBound - 1.0), upperBound);
         }
@@ -42,8 +44,7 @@ export class ValueNoise extends GpuDesignerNode {
 
             return vec4(color,1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/lib/library/v2/valuenoisefractalsum.ts b/src/texturelab/libraries/v2/valuenoisefractalsum.cpp
similarity index 75%
rename from src/lib/library/v2/valuenoisefractalsum.ts
rename to src/texturelab/libraries/v2/valuenoisefractalsum.cpp
index a50b9ea1..660f4356 100644
--- a/src/lib/library/v2/valuenoisefractalsum.ts
+++ b/src/texturelab/libraries/v2/valuenoisefractalsum.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
 // https://www.shadertoy.com/view/XdXGW8
-export class ValueNoiseFractalSum extends GpuDesignerNode {
-	public init() {
-		this.title = "Value Noise Fractal Sum";
+void ValueNoiseFractalSumNode::init()
+{
+    this->title = "Value Noise Fractal Sum";
 
-		this.addIntProperty("scale", "Scale", 8, 1, 100, 1);
-		this.addIntProperty("layers", "Layers", 5, 1, 20, 1);
-		this.addFloatProperty("gain", "Gain", 0.5, 0.1, 2, 0.1);
-		this.addFloatProperty("lacunarity", "Lacunarity", 2.0, 0.1, 2, 0.1);
+    this->addIntProp("scale", "Scale", 8, 1, 100, 1);
+    this->addIntProp("layers", "Layers", 5, 1, 20, 1);
+    this->addFloatProp("gain", "Gain", 0.5, 0.1, 2, 0.1);
+    this->addFloatProp("lacunarity", "Lacunarity", 2.0, 0.1, 2, 0.1);
 
-		const source = `
+    auto source = R""""(
         float wrapAround(float value, float upperBound) {
             return mod((value + upperBound - 1.0), upperBound);
         }
@@ -59,8 +61,7 @@ export class ValueNoiseFractalSum extends GpuDesignerNode {
 
             return vec4(color,1.0);
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
+    this->setShaderSource(source);
 }
diff --git a/src/lib/library/v2/warpv2.ts b/src/texturelab/libraries/v2/warpv2.cpp
similarity index 67%
rename from src/lib/library/v2/warpv2.ts
rename to src/texturelab/libraries/v2/warpv2.cpp
index 78913c81..1ab23700 100644
--- a/src/lib/library/v2/warpv2.ts
+++ b/src/texturelab/libraries/v2/warpv2.cpp
@@ -1,16 +1,18 @@
-import { GpuDesignerNode } from "../../designer/gpudesignernode";
+#include "../../models.h"
+#include "../../props.h"
+#include "../libv2.h"
 
-export class WarpNodeV2 extends GpuDesignerNode {
-	public init() {
-		this.title = "Warp";
+void WarpNodeV2::init()
+{
+    this->title = "Warp";
 
-		this.addInput("inputImage");
-		this.addInput("height");
+    this->addInput("inputImage");
+    this->addInput("height");
 
-		this.addFloatProperty("intensity", "Intensity", 0.1, -1.0, 1.0, 0.01);
+    this->addFloatProp("intensity", "Intensity", 0.1, -1.0, 1.0, 0.01);
 
-		// calculates normal, then warps uv by it
-		const source = `
+    // calculates normal, then warps uv by it
+    auto source = R""""(
         vec2 calcSlope(vec2 uv)
         {
             vec3 sl = vec3(0.0,0.0,0.0);
@@ -35,8 +37,7 @@ export class WarpNodeV2 extends GpuDesignerNode {
 
             return color;
         }
-        `;
+        )"""";
 
-		this.buildShader(source);
-	}
-}
+    this->setShaderSource(source);
+}
\ No newline at end of file
diff --git a/src/texturelab/main.cpp b/src/texturelab/main.cpp
new file mode 100644
index 00000000..8d662233
--- /dev/null
+++ b/src/texturelab/main.cpp
@@ -0,0 +1,15 @@
+#include "mainwindow.h"
+
+#include <QApplication>
+
+int main(int argc, char* argv[])
+{
+    QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
+    QApplication a(argc, argv);
+    MainWindow w;
+
+    w.show();
+    w.showMaximized();
+
+    return a.exec();
+}
diff --git a/src/texturelab/mainwindow.cpp b/src/texturelab/mainwindow.cpp
new file mode 100644
index 00000000..1a4c2d85
--- /dev/null
+++ b/src/texturelab/mainwindow.cpp
@@ -0,0 +1,272 @@
+#include "mainwindow.h"
+
+#include <QFileDialog>
+#include <QLayout>
+#include <QList>
+#include <QMenu>
+#include <QMenuBar>
+#include <QMessageBox>
+#include <QToolBar>
+
+#include "DockAreaWidget.h"
+#include "DockSplitter.h"
+
+#include "widgets/graphwidget.h"
+#include "widgets/librarywidget.h"
+#include "widgets/properties/propertieswidget.h"
+#include "widgets/view2dwidget.h"
+#include "widgets/view3dwidget.h"
+
+#include "viewer3d.h"
+
+#include "models.h"
+#include "project.h"
+
+#include "graphics/texturerenderer.h"
+
+MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent)
+{
+    resize(1280, 720);
+
+    this->setupMenus();
+    this->setupToolbar();
+
+    this->renderer = nullptr;
+
+    this->dockManager = new ads::CDockManager(this);
+
+    this->setupDocks();
+
+    // setup callbacks for the widgets that are created once
+    connect(this->graphWidget, &GraphWidget::nodeSelectionChanged,
+            [this](const TextureNodePtr& node) {
+                if (!!node) {
+                    this->propWidget->setSelectedNode(node);
+                    // this->view2DWidget->setSelectedNode(node);
+                }
+                else {
+                    this->propWidget->clearSelection();
+                    // this->view2DWidget->clearSelection();
+                }
+            });
+
+    connect(this->graphWidget, &GraphWidget::nodeDoubleClicked,
+            [this](const TextureNodePtr& node) {
+                if (!!node) {
+                    this->view2DWidget->setSelectedNode(node);
+                }
+                else {
+                    this->view2DWidget->clearSelection();
+                }
+            });
+
+    connect(this->propWidget, &PropertiesWidget::propertyUpdated,
+            [this](const QString& name, const QVariant& value) {
+                if (this->renderer && !!this->project) {
+                    this->renderer->update();
+                }
+
+                this->view2DWidget->reRenderNode();
+                this->view3DWidget->reRender();
+            });
+
+    connect(this->propWidget, &PropertiesWidget::textureChannelUpdated,
+            [this](const TextureChannel& name, const TextureNodePtr& node) {
+                if (this->renderer && !!this->project) {
+                    this->renderer->update();
+                }
+
+                if (!!this->project) {
+                    if (name == TextureChannel::None) {
+                        // todo: clear channel
+                    }
+                    else {
+
+                        this->project->textureChannels[name] = node->id;
+                    }
+
+                    // assign channel to viewer
+                    // do this crudely by just reassigning all node textures
+                    this->passTextureChannelsToViewer3D();
+                }
+
+                // this->view3DWidget->update();
+                this->view3DWidget->reRender();
+            });
+
+    // set default empty project
+    auto project = TextureProject::createEmpty();
+    this->setProject(project);
+
+    // test texture rendering
+    //     auto renderer = new TextureRenderer();
+    //     renderer->testRendering();
+}
+
+void MainWindow::passTextureChannelsToViewer3D()
+{
+    auto viewer = this->view3DWidget->viewer;
+    viewer->clearTextures();
+
+    for (auto channel : this->project->textureChannels.keys()) {
+        auto nodeId = this->project->textureChannels[channel];
+
+        auto node = this->project->getNodeById(nodeId);
+        if (!node)
+            continue;
+
+        switch (channel) {
+        case TextureChannel::Albedo:
+            viewer->setAlbedoTexture(node->textureId());
+            break;
+        }
+    }
+}
+
+void MainWindow::setProject(TextureProjectPtr project)
+{
+    this->project = project;
+    this->graphWidget->setTextureProject(project);
+    this->libraryWidget->setLibrary(project->library);
+
+    this->propWidget->clearSelection();
+    this->propWidget->setProject(project);
+
+    renderer = new TextureRenderer();
+    renderer->setProject(project);
+    this->graphWidget->setTextureRenderer(renderer);
+    this->view2DWidget->setTextureRenderer(renderer);
+
+    renderer->update();
+}
+
+void MainWindow::setupMenus()
+{
+    auto fileMenu = this->menuBar()->addMenu("File");
+    fileMenu->addAction("Open Project", [=]() { this->openProject(); });
+    fileMenu->addAction("New Project", [=]() { this->newProject(); });
+    fileMenu->addSeparator();
+    fileMenu->addAction("Save", []() {});
+    fileMenu->addAction("Save As...", []() {});
+    fileMenu->addSeparator();
+    fileMenu->addAction("Edit", []() {});
+
+    auto editMenu = this->menuBar()->addMenu("Edit");
+    editMenu->addAction("Undo", []() {});
+    editMenu->addAction("Redo", []() {});
+    editMenu->addAction("Cut", []() {});
+    editMenu->addAction("Copy", []() {});
+    editMenu->addAction("Paste", []() {});
+
+    auto examplesMenu = this->menuBar()->addMenu("Examples");
+    auto optionsMenu = this->menuBar()->addMenu("Help");
+    optionsMenu->addAction("Documentation", []() {});
+    optionsMenu->addAction("About", []() {});
+}
+
+void MainWindow::setupToolbar()
+{
+    // https://www.setnode.com/blog/right-aligning-a-button-in-a-qtoolbar/
+    toolBar = this->addToolBar("main toolbar");
+
+    QWidget* spacer = new QWidget();
+    spacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    // undo redo
+    toolBar->addAction("Undo");
+    toolBar->addAction("Redo");
+
+    // spacer
+    toolBar->addWidget(spacer);
+
+    // export
+    toolBar->addAction("Export");
+
+    // behavior
+    toolBar->setMovable(false);
+}
+
+/*
+    https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System/issues/411
+    https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System/issues/340
+
+    pass ratios as fractions, the function handles the actual width calculation
+    setWidgetRatiosInArea(myArea, { 1.0f/5.0f, 1.0f/5.0f, 1.0f/5.0f })
+*/
+void setWidgetRatiosInArea(ads::CDockAreaWidget* area,
+                           const QList<float>& ratios)
+{
+    auto splitter = ads::internal::findParent<ads::CDockSplitter*>(area);
+    if (splitter) {
+        int width = splitter->width();
+
+        QList<int> finalRatios;
+        for (auto ratio : ratios) {
+            finalRatios.append(ratio * width);
+        }
+        splitter->setSizes(finalRatios);
+    }
+}
+
+void MainWindow::setupDocks()
+{
+    setDockNestingEnabled(true);
+
+    // https://forum.qt.io/topic/3055/mainwindow-layout-problem-with-qdockwidget/17
+
+    // graph goes in the center
+    this->graphWidget = new GraphWidget();
+    this->view2DWidget = new View2DWidget();
+    this->view3DWidget = new View3DWidget();
+
+    auto graphArea =
+        addDock("Graph", ads::CenterDockWidgetArea, graphWidget, nullptr);
+    auto leftArea = addDock("2D View", ads::LeftDockWidgetArea,
+                            this->view2DWidget, graphArea);
+
+    this->propWidget = new PropertiesWidget();
+    auto rightArea = addDock("Properties", ads::RightDockWidgetArea,
+                             this->propWidget, graphArea);
+
+    this->libraryWidget = new LibraryWidget();
+    setWidgetRatiosInArea(graphArea, {1.0f / 5, 3.0f / 5, 1.0f / 5});
+
+    addDock("3D View", ads::BottomDockWidgetArea, this->view3DWidget, leftArea);
+    addDock("Library", ads::BottomDockWidgetArea, this->libraryWidget,
+            rightArea);
+    setWidgetRatiosInArea(leftArea, {0.5f, 0.5f});
+    setWidgetRatiosInArea(rightArea, {0.5f, 0.5f});
+}
+
+ads::CDockAreaWidget* MainWindow::addDock(const QString& title,
+                                          ads::DockWidgetArea area,
+                                          QWidget* widget,
+                                          ads::CDockAreaWidget* areaWidget)
+{
+    ads::CDockWidget* dockWidget = new ads::CDockWidget(title);
+    if (widget != nullptr)
+        dockWidget->setWidget(widget);
+
+    auto newAreaWidget =
+        dockManager->addDockWidget(area, dockWidget, areaWidget);
+
+    return newAreaWidget;
+}
+
+void MainWindow::openProject()
+{
+    auto filePath = QFileDialog::getOpenFileName(this, "Open Texture File", "",
+                                                 "Texturelab File (*.texture)");
+
+    if (filePath.isNull() || filePath.isEmpty()) {
+        return;
+    }
+
+    auto project = Project::loadTexture(filePath);
+
+    setProject(project);
+}
+
+void MainWindow::newProject() { setProject(TextureProject::createEmpty()); }
+
+MainWindow::~MainWindow() {}
\ No newline at end of file
diff --git a/src/texturelab/mainwindow.h b/src/texturelab/mainwindow.h
new file mode 100644
index 00000000..cfe8c178
--- /dev/null
+++ b/src/texturelab/mainwindow.h
@@ -0,0 +1,59 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include "DockManager.h"
+#include <QMainWindow>
+#include <QSharedPointer>
+#include <QString>
+
+class GraphWidget;
+class LibraryWidget;
+class PropertiesWidget;
+class View2DWidget;
+class View3DWidget;
+class TextureRenderer;
+
+class TextureProject;
+typedef QSharedPointer<TextureProject> TextureProjectPtr;
+
+class QToolBar;
+class MainWindow : public QMainWindow {
+    Q_OBJECT
+
+public:
+    MainWindow(QWidget* parent = nullptr);
+    ~MainWindow();
+
+protected:
+    void setupToolbar();
+    void setupMenus();
+    void setupDocks();
+
+    // menu callbacks
+    void openProject();
+    void newProject();
+
+    void passTextureChannelsToViewer3D();
+
+    void setProject(TextureProjectPtr project);
+
+    ads::CDockAreaWidget* addDock(const QString& title,
+                                  ads::DockWidgetArea area, QWidget* widget,
+                                  ads::CDockAreaWidget* areaWidget);
+
+private:
+    ads::CDockManager* dockManager;
+    QToolBar* toolBar;
+    QWidget* editor;
+
+    GraphWidget* graphWidget;
+    LibraryWidget* libraryWidget;
+    PropertiesWidget* propWidget;
+    View2DWidget* view2DWidget;
+    View3DWidget* view3DWidget;
+
+    TextureRenderer* renderer;
+
+    TextureProjectPtr project;
+};
+#endif // MAINWINDOW_H
diff --git a/src/texturelab/models.cpp b/src/texturelab/models.cpp
new file mode 100644
index 00000000..9fd51c7d
--- /dev/null
+++ b/src/texturelab/models.cpp
@@ -0,0 +1,260 @@
+#include "models.h"
+#include "libraries/library.h"
+#include "props.h"
+#include <QOpenGLFramebufferObject>
+#include <QQueue>
+
+TextureNodePtr TextureProject::getNodeById(const QString& id)
+{
+    return nodes[id];
+}
+
+ConnectionPtr TextureProject::getConnectionById(const QString& id)
+{
+    return connections[id];
+}
+
+QVector<TextureNodePtr> TextureProject::getNodeDependencies(const QString& id)
+{
+    auto node = nodes[id];
+
+    QVector<TextureNodePtr> cons;
+    for (auto con : connections) {
+        if (con->rightNode == node) {
+            auto depNode = con->leftNode;
+            cons.append(depNode);
+        }
+    }
+
+    return cons;
+}
+
+QVector<TextureNodePtr> TextureProject::getNodeRightOfNode(const QString& id)
+{
+    auto node = nodes[id];
+
+    QVector<TextureNodePtr> cons;
+    for (auto con : connections) {
+        if (con->leftNode == node) {
+            auto nextNode = con->rightNode;
+            cons.append(nextNode);
+        }
+    }
+
+    return cons;
+}
+
+void TextureProject::addNode(const TextureNodePtr& node)
+{
+    // todo: check if node already exists
+    this->nodes[node->id] = node;
+}
+
+void TextureProject::addConnection(TextureNodePtr leftNode,
+                                   TextureNodePtr rightNode,
+                                   QString rightNodeInput)
+{
+    QSharedPointer<Connection> con(new Connection());
+    con->id = createGuid();
+
+    con->leftNode = leftNode;
+    con->rightNode = rightNode;
+
+    con->rightNodeInputName = rightNodeInput;
+
+    this->connections[con->id] = con;
+
+    // todo: request updates
+}
+
+ConnectionPtr TextureProject::removeConnection(const QString& leftNode,
+                                               const QString& rightNode,
+                                               const QString& rightNodeInput)
+{
+    for (auto conKey : connections.keys()) {
+        auto con = connections[conKey];
+
+        if (con->leftNode->id == leftNode && con->rightNode->id == rightNode &&
+            con->rightNodeInputName == rightNodeInput) {
+            connections.remove(conKey);
+
+            return con;
+        }
+    }
+
+    return ConnectionPtr(nullptr);
+}
+
+void TextureProject::removeConnection(ConnectionPtr con)
+{
+    this->connections.remove(con->id);
+}
+
+void TextureProject::removeConnection(const QString& id)
+{
+    this->connections.remove(id);
+}
+
+void TextureProject::markNodeAsDirty(const TextureNodePtr& node)
+{
+    QQueue<TextureNodePtr> queue;
+    queue.enqueue(node);
+
+    while (!queue.isEmpty()) {
+        auto nextNode = queue.dequeue();
+        nextNode->isDirty = true;
+
+        auto list = getNodeRightOfNode(nextNode->id);
+        for (auto item : list)
+            queue.enqueue(item);
+    }
+}
+
+TextureProjectPtr TextureProject::createEmpty(Library* library)
+{
+    auto project = new TextureProject();
+    project->randomSeed = 0;
+    if (library != nullptr)
+        project->library = library;
+    else
+        project->library = createLibraryV2();
+
+    return TextureProjectPtr(project);
+}
+
+TextureNode::TextureNode()
+{
+    id = createGuid();
+    isDirty = true;
+}
+
+void TextureNode::addInput(const QString& inputName)
+{
+    inputs.append(inputName);
+}
+
+void TextureNode::setProp(QString propName, QVariant value)
+{
+    if (props.contains(propName)) {
+        props[propName]->setValue(value);
+        this->isDirty = true;
+    }
+}
+
+unsigned int TextureNode::textureId() { return this->texture->texture(); }
+
+PropertyGroup* TextureNode::createGroup(const QString& name)
+{
+    auto group = new PropertyGroup();
+    group->name = name;
+    this->propertyGroups.append(group);
+
+    return group;
+}
+
+IntProp* TextureNode::addIntProp(const QString& name,
+                                 const QString& displayName, int defaultVal,
+                                 int minVal, int maxVal, int increment)
+{
+    auto prop = new IntProp();
+    prop->name = name;
+    prop->displayName = displayName;
+    prop->minValue = minVal;
+    prop->maxValue = maxVal;
+    prop->step = increment;
+    prop->value = defaultVal;
+
+    props[name] = prop;
+
+    return prop;
+}
+
+FloatProp* TextureNode::addFloatProp(const QString& name,
+                                     const QString& displayName,
+                                     double defaultVal, double minVal,
+                                     double maxVal, double increment)
+{
+    auto prop = new FloatProp();
+    prop->name = name;
+    prop->displayName = displayName;
+    prop->minValue = minVal;
+    prop->maxValue = maxVal;
+    prop->step = increment;
+    prop->value = defaultVal;
+
+    props[name] = prop;
+
+    return prop;
+}
+
+BoolProp* TextureNode::addBoolProp(const QString& name,
+                                   const QString& displayName, bool defaultVal)
+{
+    auto prop = new BoolProp();
+    prop->name = name;
+    prop->displayName = displayName;
+    prop->value = defaultVal;
+
+    props[name] = prop;
+
+    return prop;
+}
+
+EnumProp* TextureNode::addEnumProp(const QString& name,
+                                   const QString& displayName,
+                                   QList<QString> values)
+{
+    auto prop = new EnumProp();
+    prop->name = name;
+    prop->displayName = displayName;
+    prop->values = values;
+    prop->index = 0;
+
+    props[name] = prop;
+
+    return prop;
+}
+
+ColorProp* TextureNode::addColorProp(const QString& name,
+                                     const QString& displayName,
+                                     const QColor& defaultVal)
+{
+    auto prop = new ColorProp();
+    prop->name = name;
+    prop->displayName = displayName;
+    prop->value = defaultVal;
+
+    props[name] = prop;
+
+    return prop;
+}
+
+StringProp* TextureNode::addStringProp(const QString& name,
+                                       const QString& displayName,
+                                       const QString& defaultVal)
+{
+    auto prop = new StringProp();
+    prop->name = name;
+    prop->displayName = displayName;
+    prop->value = defaultVal;
+
+    props[name] = prop;
+
+    return prop;
+}
+
+// GradientProp* addGradientProp(const QString& name, const QString&
+// displayName,
+//                               Gradient defaultVal);
+
+ImageProp* TextureNode::addImageProp(const QString& name,
+                                     const QString& displayName)
+{
+    auto prop = new ImageProp();
+    prop->name = name;
+    prop->displayName = displayName;
+
+    props[name] = prop;
+
+    return prop;
+}
\ No newline at end of file
diff --git a/src/texturelab/models.h b/src/texturelab/models.h
new file mode 100644
index 00000000..4dd54a4d
--- /dev/null
+++ b/src/texturelab/models.h
@@ -0,0 +1,185 @@
+#ifndef MODELS_H
+#define MODELS_H
+
+#include <QEnableSharedFromThis>
+#include <QList>
+#include <QMap>
+#include <QSharedPointer>
+#include <QString>
+#include <QVector2D>
+
+class QOpenGLFramebufferObject;
+class QOpenGLShaderProgram;
+
+class TextureProject;
+class TextureNode;
+class Comment;
+class Frame;
+class Connection;
+typedef QSharedPointer<TextureProject> TextureProjectPtr;
+typedef QSharedPointer<TextureNode> TextureNodePtr;
+typedef QSharedPointer<Comment> CommentPtr;
+typedef QSharedPointer<Frame> FramePtr;
+typedef QSharedPointer<Connection> ConnectionPtr;
+
+class Prop;
+class PropertyGroup;
+class Library;
+
+class IntProp;
+class FloatProp;
+class BoolProp;
+class EnumProp;
+class ColorProp;
+class StringProp;
+class ImageProp;
+
+enum class PackageFileType { Texture, Image };
+
+enum class TextureChannel : int {
+    None = 0,
+    Albedo = 1,
+    Normal = 2,
+    Metalness = 3,
+    Roughness = 4,
+    Height = 5,
+    Alpha = 6
+};
+
+class ProjectFile {
+public:
+    QByteArray contents();
+};
+
+class TextureProject : public QEnableSharedFromThis<TextureProject> {
+public:
+    int randomSeed;
+    int textureWidth = 1024;
+    int textureHeight = 1024;
+
+    // texturechannel:nodeid
+    QMap<TextureChannel, QString> textureChannels;
+
+    Library* library = nullptr;
+
+    QMap<QString, TextureNodePtr> nodes;
+    QMap<QString, ConnectionPtr> connections;
+    QMap<QString, CommentPtr> comments;
+    QMap<QString, FramePtr> frames;
+
+    TextureNodePtr getNodeById(const QString& id);
+    ConnectionPtr getConnectionById(const QString& id);
+    QVector<TextureNodePtr> getNodeDependencies(const QString& id);
+    QVector<TextureNodePtr> getNodeRightOfNode(const QString& id);
+
+    void addNode(const TextureNodePtr& node);
+
+    // todo: make two port variant
+    void addConnection(TextureNodePtr leftNode, TextureNodePtr rightNode,
+                       QString rightNodeInput);
+
+    ConnectionPtr removeConnection(const QString& leftNode,
+                                   const QString& rightNode,
+                                   const QString& rightNodeInput);
+    void removeConnection(ConnectionPtr con);
+    void removeConnection(const QString& id);
+
+    void markNodeAsDirty(const TextureNodePtr& node);
+
+    static TextureProjectPtr createEmpty(Library* library = nullptr);
+};
+
+class TextureNode : public QEnableSharedFromThis<TextureNode> {
+public:
+    QString id;
+    QString title;
+
+    QVector2D pos;
+
+    QList<QString> inputs;
+
+    long randomSeed;
+    QString exportName;
+
+    QMap<QString, Prop*> props;
+    QList<PropertyGroup*> propertyGroups;
+
+    // texture needs updating
+    bool isDirty;
+
+    int textureWidth;
+    int textureHeight;
+    QOpenGLFramebufferObject* texture = nullptr;
+    QOpenGLShaderProgram* shader = nullptr;
+    QString shaderSource;
+
+    TextureNode();
+
+    virtual void init(){};
+
+    void addInput(const QString& inputName);
+
+    void setProp(QString propName, QVariant value);
+
+    void setShaderSource(const QString& source) { shaderSource = source; }
+
+    bool isGraphicsResourcesInitialized()
+    {
+        return texture != nullptr && shader != nullptr;
+    }
+
+    unsigned int textureId();
+
+    PropertyGroup* createGroup(const QString& name);
+
+    // add prop functions
+    IntProp* addIntProp(const QString& name, const QString& displayName,
+                        int defaultVal = 1, int minVal = 1, int maxVal = 100,
+                        int increment = 1);
+    FloatProp* addFloatProp(const QString& name, const QString& displayName,
+                            double defaultVal = 1, double minVal = 1,
+                            double maxVal = 100, double increment = 1);
+    BoolProp* addBoolProp(const QString& name, const QString& displayName,
+                          bool defaultVal = false);
+    EnumProp* addEnumProp(const QString& name, const QString& displayName,
+                          QList<QString> defaultVal);
+    ColorProp* addColorProp(const QString& name, const QString& displayName,
+                            const QColor& defaultVal);
+    StringProp* addStringProp(const QString& name, const QString& displayName,
+                              const QString& defaultVal = "");
+
+    // GradientProp* addGradientProp(const QString& id, const QString&
+    // displayName,
+    //                               Gradient defaultVal);
+
+    ImageProp* addImageProp(const QString& name, const QString& displayName);
+};
+
+class Comment : public QEnableSharedFromThis<Comment> {
+public:
+    QString id;
+    QString text;
+    QVector2D pos;
+};
+
+class Frame : public QEnableSharedFromThis<Frame> {
+public:
+    QString id;
+    QString text;
+
+    QVector2D pos;
+    QVector2D size;
+};
+
+class Connection : public QEnableSharedFromThis<Connection> {
+public:
+    QString id;
+
+    TextureNodePtr leftNode;
+    TextureNodePtr rightNode;
+
+    QString leftNodeOutputName;
+    QString rightNodeInputName;
+};
+
+#endif
\ No newline at end of file
diff --git a/src/texturelab/project.cpp b/src/texturelab/project.cpp
new file mode 100644
index 00000000..f5d0dea9
--- /dev/null
+++ b/src/texturelab/project.cpp
@@ -0,0 +1,77 @@
+#include "project.h"
+#include "libraries/library.h"
+#include <QFile>
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QJsonObject>
+
+TextureProjectPtr Project::loadTexture(QString path)
+{
+    QFile file(path);
+    file.open(QIODevice::ReadOnly);
+    QJsonParseError error;
+    auto json = QJsonDocument::fromJson(file.readAll(), &error);
+    file.close();
+
+    if (error.error) {
+        // report error
+        return TextureProjectPtr(nullptr);
+    }
+
+    TextureProjectPtr texture(new TextureProject());
+
+    // qDebug() << json["libraryVersion"].toString();
+
+    // create library from version
+    // Library *lib = new LibraryV1();
+    Library* lib = createLibraryV2();
+
+    // scene objects
+    auto sceneObj = json["scene"].toObject();
+    auto sceneNodesObj = sceneObj["nodes"].toObject();
+
+    // load nodes
+    auto nodeArray = json["nodes"].toArray();
+    for (auto item : nodeArray) {
+        auto nodeDef = item.toObject();
+
+        auto node = lib->createNode(nodeDef["typeName"].toString());
+        node->exportName = nodeDef["exportName"].toString("");
+        node->id = nodeDef["id"].toString();
+        node->randomSeed = nodeDef["randomSeed"].toInteger(0);
+
+        // get position from scene
+        // we're converging the scene and designer props into one
+        auto sceneObj = sceneNodesObj[node->id].toObject();
+        auto x = sceneObj["x"].toDouble();
+        auto y = sceneObj["y"].toDouble();
+        node->pos = QVector2D(x, y);
+
+        // add props
+        auto propObj = nodeDef["properties"].toObject();
+        for (auto key : propObj.keys()) {
+            node->setProp(key, propObj[key].toVariant());
+        }
+
+        texture->nodes[node->id] = node;
+    }
+
+    // load connections
+    auto conArray = json["connections"].toArray();
+    for (auto item : conArray) {
+        auto conObj = item.toObject();
+
+        QString leftNodeId = conObj["leftNodeId"].toString();
+        TextureNodePtr leftNode = texture->getNodeById(leftNodeId);
+
+        QString rightNodeId = conObj["rightNodeId"].toString();
+        TextureNodePtr rightNode = texture->getNodeById(rightNodeId);
+
+        QString rightNodeInputId = conObj["rightNodeInput"].toString();
+        texture->addConnection(leftNode, rightNode, rightNodeInputId);
+    }
+
+    texture->library = lib;
+
+    return texture;
+}
\ No newline at end of file
diff --git a/src/texturelab/project.h b/src/texturelab/project.h
new file mode 100644
index 00000000..445fba83
--- /dev/null
+++ b/src/texturelab/project.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "models.h"
+
+class Project
+{
+public:
+    static TextureProjectPtr loadTexture(QString path);
+};
\ No newline at end of file
diff --git a/src/texturelab/props.cpp b/src/texturelab/props.cpp
new file mode 100644
index 00000000..a1360b6c
--- /dev/null
+++ b/src/texturelab/props.cpp
@@ -0,0 +1,70 @@
+#include "props.h"
+
+#include <QString>
+
+QString createGuid()
+{
+    return QUuid::createUuid().toString(QUuid::WithoutBraces);
+}
+
+QString PropType::toString(Value propType)
+{
+    switch (propType) {
+    case Float:
+        return "float";
+    case Int:
+        return "int";
+    case Bool:
+        return "bool";
+    case Color:
+        return "color";
+    case Enum:
+        return "enum";
+    case String:
+        return "string";
+    case Gradient:
+        return "gradient";
+    case Image:
+        return "image";
+    }
+
+    return "unknown";
+}
+
+PropType::Value PropType::fromString(QString propType)
+{
+    if (propType == "float")
+        return Float;
+    if (propType == "int")
+        return Int;
+    if (propType == "bool")
+        return Bool;
+    if (propType == "color")
+        return Color;
+    if (propType == "enum")
+        return Enum;
+    if (propType == "string")
+        return String;
+    if (propType == "gradient")
+        return Gradient;
+    if (propType == "image")
+        return Image;
+
+    return Unknown;
+}
+
+Prop::Prop() { id = createGuid(); }
+
+QJsonObject Prop::toJson()
+{
+    QJsonObject obj;
+    obj["id"] = id;
+    obj["name"] = name;
+    obj["displayName"] = displayName;
+}
+void Prop::fromJson(const QJsonObject& obj)
+{
+    id = obj["id"].toString();
+    name = obj["name"].toString();
+    displayName = obj["displayName"].toString();
+}
\ No newline at end of file
diff --git a/src/texturelab/props.h b/src/texturelab/props.h
new file mode 100644
index 00000000..0e486558
--- /dev/null
+++ b/src/texturelab/props.h
@@ -0,0 +1,323 @@
+#pragma once
+
+#include <QBuffer>
+#include <QColor>
+#include <QIODevice>
+#include <QImage>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QList>
+#include <QString>
+#include <QUuid>
+
+class Prop;
+class PropertyGroup;
+
+// http://techiesolves.blogspot.com/2018/01/base64-qstring-to-qimage-to-qstring-in.html
+QString createGuid();
+class PropType {
+public:
+    enum Value {
+        Unknown = -1,
+        Float = 0,
+        Int,
+        Bool,
+        Color,
+        Enum,
+        String,
+        Gradient,
+        Image
+    };
+
+    static QString toString(Value propType);
+
+    static Value fromString(QString propType);
+};
+
+class Prop {
+public:
+    QString id;
+    QString name;
+    QString displayName;
+    PropType::Value type;
+
+    PropertyGroup* group = nullptr;
+
+    Prop();
+
+    virtual QVariant getValue() = 0;
+    virtual void setValue(QVariant val) = 0;
+
+    virtual QJsonObject toJson();
+    virtual void fromJson(const QJsonObject& obj);
+
+    virtual ~Prop() {}
+};
+
+class PropertyGroup {
+public:
+    QString name;
+    QList<Prop*> props;
+    bool collapsed = true;
+
+    void add(Prop* prop)
+    {
+        this->props.append(prop);
+        prop->group = this;
+    }
+};
+
+class FloatProp : public Prop {
+public:
+    double value;
+    double minValue;
+    double maxValue;
+    double step;
+
+    FloatProp() : Prop()
+    {
+        value = 0;
+        minValue = 0;
+        maxValue = 1;
+        step = 0.1;
+        type = PropType::Float;
+    }
+
+    QVariant getValue() override { return QVariant::fromValue(value); }
+
+    void setValue(QVariant val) override { value = val.toDouble(); }
+
+    QJsonObject toJson() override
+    {
+        auto obj = Prop::toJson();
+        obj["value"] = value;
+        obj["minValue"] = minValue;
+        obj["maxValue"] = maxValue;
+        obj["step"] = step;
+        return obj;
+    }
+
+    void fromJson(const QJsonObject& obj) override
+    {
+        Prop::fromJson(obj);
+        value = obj["value"].toDouble();
+        minValue = obj["minValue"].toDouble();
+        maxValue = obj["maxValue"].toDouble();
+        step = obj["step"].toDouble();
+    }
+};
+
+class IntProp : public Prop {
+public:
+    long value;
+    long minValue;
+    long maxValue;
+    long step;
+
+    IntProp() : Prop()
+    {
+        value = 0;
+        minValue = 0;
+        maxValue = 100;
+        step = 1;
+        type = PropType::Int;
+    }
+
+    QVariant getValue() override { return QVariant::fromValue(value); }
+
+    void setValue(QVariant val) override { value = (long)val.toLongLong(); }
+
+    QJsonObject toJson() override
+    {
+        auto obj = Prop::toJson();
+        obj["value"] = (qlonglong)value;
+        obj["minValue"] = (qlonglong)minValue;
+        obj["maxValue"] = (qlonglong)maxValue;
+        obj["step"] = (qlonglong)step;
+        return obj;
+    }
+
+    void fromJson(const QJsonObject& obj) override
+    {
+        Prop::fromJson(obj);
+        value = obj["value"].toDouble();
+        minValue = obj["minValue"].toDouble();
+        maxValue = obj["maxValue"].toDouble();
+        step = obj["step"].toDouble();
+    }
+};
+
+class BoolProp : public Prop {
+public:
+    bool value;
+
+    BoolProp() : Prop()
+    {
+        type = PropType::Bool;
+        value = false;
+    }
+
+    QVariant getValue() override { return value; }
+
+    void setValue(QVariant val) override { value = val.toBool(); }
+
+    QJsonObject toJson() override
+    {
+        auto obj = Prop::toJson();
+        obj["value"] = value ? "true" : "false";
+        return obj;
+    }
+
+    void fromJson(const QJsonObject& obj) override
+    {
+        Prop::fromJson(obj);
+        value = obj["value"].toBool();
+    }
+};
+
+class EnumProp : public Prop {
+public:
+    QList<QString> values;
+    int index;
+
+    EnumProp() : Prop()
+    {
+        type = PropType::Enum;
+        index = 0;
+    }
+
+    QVariant getValue() override { return index; }
+
+    void setValue(QVariant val) override { index = val.value<int>(); }
+
+    QJsonObject toJson() override
+    {
+        auto obj = Prop::toJson();
+        obj["index"] = index;
+
+        // values
+        QJsonArray valueList;
+        for (auto enumValue : values) {
+            valueList.append(enumValue);
+        }
+        obj["values"] = valueList;
+
+        return obj;
+    }
+
+    void fromJson(const QJsonObject& obj) override
+    {
+        Prop::fromJson(obj);
+        index = obj["index"].toInt();
+
+        auto list = obj["values"].toArray();
+        values.empty();
+        for (auto item : list) {
+            values.append(item.toString());
+        }
+    }
+};
+
+struct ColorProp : public Prop {
+    QColor value;
+
+    ColorProp() : Prop() { type = PropType::Color; }
+
+    QVariant getValue() override { return value; }
+
+    void setValue(QVariant val) override { value = val.value<QColor>(); }
+
+    QJsonObject toJson() override
+    {
+        auto obj = Prop::toJson();
+        QJsonObject colObj;
+        colObj["r"] = value.red();
+        colObj["g"] = value.green();
+        colObj["b"] = value.blue();
+        colObj["a"] = value.alpha();
+        obj["value"] = colObj;
+
+        return obj;
+    }
+
+    void fromJson(const QJsonObject& obj) override
+    {
+        Prop::fromJson(obj);
+        auto colorObj = obj["value"].toObject();
+        value.setRed(colorObj["r"].toInt());
+        value.setGreen(colorObj["g"].toInt());
+        value.setBlue(colorObj["b"].toInt());
+        value.setAlpha(colorObj["a"].toInt());
+    }
+};
+
+class StringProp : public Prop {
+public:
+    QString value;
+
+    StringProp() : Prop() { type = PropType::Color; }
+
+    QVariant getValue() override { return value; }
+
+    void setValue(QVariant val) override { value = val.value<QString>(); }
+
+    QJsonObject toJson() override
+    {
+        auto obj = Prop::toJson();
+        obj["value"] = value;
+        return obj;
+    }
+
+    void fromJson(const QJsonObject& obj) override
+    {
+        Prop::fromJson(obj);
+        value = obj["value"].toString();
+    }
+};
+
+class ImageProp : public Prop {
+public:
+    QImage value;
+
+    ImageProp() : Prop() { type = PropType::Image; }
+
+    QVariant getValue() override { return value; }
+
+    void setValue(QVariant val) override { value = val.value<QImage>(); }
+
+    QJsonObject toJson() override
+    {
+        auto obj = Prop::toJson();
+        if (value.isNull()) {
+            obj["value"] = "";
+            return obj;
+        }
+
+        QBuffer buffer;
+        buffer.open(QIODevice::WriteOnly);
+        value.save(&buffer, "PNG");
+        QString encoded = buffer.data().toBase64();
+
+        obj["value"] = "data:image/png;base64," + encoded;
+        return obj;
+    }
+
+    void fromJson(const QJsonObject& obj) override
+    {
+        Prop::fromJson(obj);
+
+        auto stringData = obj["value"].toString();
+        if (stringData.isNull() || stringData.isEmpty())
+            return;
+
+        auto parts = stringData.split(";base64,");
+        if (parts.length() == 0 || parts.length() == 1)
+            return;
+
+        auto bytes = QByteArray::fromBase64(parts[0].toUtf8());
+
+        QImage image;
+        image.loadFromData(QByteArray::fromBase64(stringData.toUtf8()));
+        this->value = value;
+    }
+};
\ No newline at end of file
diff --git a/src/texturelab/utils.h b/src/texturelab/utils.h
new file mode 100644
index 00000000..8bbc3aa6
--- /dev/null
+++ b/src/texturelab/utils.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <QWidget>
+
+enum class Roles : int {
+    ItemType = Qt::UserRole + 1,
+    IdentityData = Qt::UserRole + 2,
+
+    LibraryItemName = Qt::UserRole + 10
+};
+
+const QString LIBRARY_ITEM_MIME_FORMAT = "texturelab/library-item";
\ No newline at end of file
diff --git a/src/texturelab/widgets/graphwidget.cpp b/src/texturelab/widgets/graphwidget.cpp
new file mode 100644
index 00000000..ba97bc57
--- /dev/null
+++ b/src/texturelab/widgets/graphwidget.cpp
@@ -0,0 +1,201 @@
+#include "graphwidget.h"
+#include <QDragEnterEvent>
+#include <QMainWindow>
+#include <QMenu>
+#include <QMenuBar>
+#include <QMimeData>
+#include <QOpenGLContext>
+#include <QToolBar>
+
+#include "./graphics/texturerenderer.h"
+#include "./models.h"
+#include "./utils.h"
+#include "graph/scene.h"
+#include "libraries/library.h"
+#include "librarywidget.h"
+#include "nodegraph.h"
+
+GraphWidget::GraphWidget() : QMainWindow(nullptr)
+{
+    graph = new nodegraph::NodeGraph(this);
+    this->setCentralWidget(graph);
+
+    this->setAcceptDrops(true);
+
+    connect(graph, &nodegraph::NodeGraph::connectionAdded,
+            [=](nodegraph::ConnectionPtr con) {
+                qDebug() << "CONNECTION ADDED";
+
+                // auto sceneCon = project->getConnectionById(con->id());
+                // sceneCon->rightNode->isDirty = true;
+
+                auto leftNode =
+                    project->getNodeById(con->startPort->node->id());
+                auto rightNode = project->getNodeById(con->endPort->node->id());
+                auto rightName = con->endPort->name;
+
+                project->addConnection(leftNode, rightNode, rightName);
+
+                // make ready for update
+                rightNode->isDirty = true;
+
+                // todo: try to update later
+                renderer->update();
+            });
+
+    connect(graph, &nodegraph::NodeGraph::connectionRemoved,
+            [=](nodegraph::ConnectionPtr con) {
+                qDebug() << "CONNECTION REMOVED";
+
+                auto leftNodeId = con->startPort->node->id();
+                auto rightNodeId = con->endPort->node->id();
+                auto portName = con->endPort->name;
+
+                auto removedCon = project->removeConnection(
+                    leftNodeId, rightNodeId, portName);
+
+                removedCon->rightNode->isDirty = true;
+
+                // todo: try to update later
+                renderer->update();
+            });
+
+    connect(graph, &nodegraph::NodeGraph::nodeSelectionChanged,
+            [=](nodegraph::NodePtr node) {
+                if (!!node) {
+                    qDebug() << "NODE SELECTED";
+
+                    if (!!project) {
+                        auto texNode = project->getNodeById(node->id());
+                        emit nodeSelectionChanged(texNode);
+                    }
+                }
+                else {
+                    qDebug() << "NODE DESELECTED";
+                    emit nodeSelectionChanged(TextureNodePtr(nullptr));
+                }
+            });
+
+    connect(graph, &nodegraph::NodeGraph::nodeDoubleClicked,
+            [=](nodegraph::NodePtr node) {
+                if (!!node) {
+                    // qDebug() << "NODE DOUBLE CLICKED";
+
+                    if (!!project) {
+                        auto texNode = project->getNodeById(node->id());
+                        emit nodeDoubleClicked(texNode);
+                    }
+                }
+                else {
+                    // qDebug() << "NODE DESELECTED";
+                    emit nodeDoubleClicked(TextureNodePtr(nullptr));
+                }
+            });
+
+    // connect(graph, &nodegraph::NodeGraph::nodeAdded,
+    //         [=](nodegraph::NodePtr node) { qDebug() << "NODE ADDED"; });
+
+    // connect(graph, &nodegraph::NodeGraph::nodeRemoved,
+    //         [=](nodegraph::NodePtr node) { qDebug() << "NODE REMOVED"; });
+
+    // library = nullptr;
+}
+
+void GraphWidget::setTextureProject(TextureProjectPtr project)
+{
+    // generate nodes from texture project
+
+    //   auto scene = graph->scene();
+    auto scene = nodegraph::Scene::create();
+    // auto scene = new nodegraph::Scene();
+    this->scene = scene;
+    this->project = project;
+
+    // add nodes
+    for (auto node : project->nodes) {
+        this->addNode(node);
+    }
+
+    // add connections
+    for (auto con : project->connections) {
+        auto leftNode = scene->getNodeById(con->leftNode->id);
+        auto rightNode = scene->getNodeById(con->rightNode->id);
+
+        scene->connectNodes(leftNode, "output", rightNode,
+                            con->rightNodeInputName);
+    }
+
+    // todo: add frames
+    // todo: add comments
+    // todo: add navigations
+
+    // graph->setNodeGraphScene(nodegraph::ScenePtr(scene));
+    graph->setNodeGraphScene(scene);
+}
+
+void GraphWidget::addNode(const TextureNodePtr& node)
+{
+    auto gnode = nodegraph::Node::create();
+    gnode->setName(node->title);
+    for (auto input : node->inputs) {
+        gnode->addInPort(input);
+    }
+
+    gnode->setId(node->id);
+    gnode->addOutPort("output");
+    gnode->setPos(node->pos.x(), node->pos.y());
+
+    scene->addNode(gnode);
+}
+
+void GraphWidget::dragEnterEvent(QDragEnterEvent* evt)
+{
+    // qDebug() << "Drag enter";
+    evt->acceptProposedAction();
+}
+
+void GraphWidget::dragMoveEvent(QDragMoveEvent* evt)
+{
+    // qDebug() << "drag move";
+    evt->acceptProposedAction();
+}
+
+void GraphWidget::dropEvent(QDropEvent* evt)
+{
+    auto mimeData = evt->mimeData();
+    if (mimeData->hasFormat(LIBRARY_ITEM_MIME_FORMAT)) {
+        // auto data = qobject_cast<const LibraryItemMimeData*>(mimeData);
+        auto data = (const LibraryItemMimeData*)mimeData;
+
+        // qDebug() << data->libraryItemName;
+        // create node from library
+        auto node = project->library->createNode(data->libraryItemName);
+
+        auto scenePos = this->graph->mapToScene(evt->position().toPoint());
+        node->pos = QVector2D(scenePos) - QVector2D(50, 50);
+
+        this->project->addNode(node);
+        this->addNode(node);
+
+        this->renderer->update();
+
+        evt->accept();
+    }
+    // mimeData->formats().contains()
+    // if (mimeData->data("ITEM_TYPE").toStdString() == "")
+}
+
+void GraphWidget::setTextureRenderer(TextureRenderer* renderer)
+{
+    this->renderer = renderer;
+
+    connect(renderer, &TextureRenderer::thumbnailGenerated,
+            [=](const QString& nodeId, GLint texId, const QPixmap& pixmap) {
+                // scene->setNodeThumbnail(nodeId, pixmap);
+                auto node = scene->getNodeById(nodeId);
+                if (node) {
+                    node->setThumbnail(pixmap);
+                    node->setTextureId(texId);
+                }
+            });
+}
\ No newline at end of file
diff --git a/src/texturelab/widgets/graphwidget.h b/src/texturelab/widgets/graphwidget.h
new file mode 100644
index 00000000..293929bf
--- /dev/null
+++ b/src/texturelab/widgets/graphwidget.h
@@ -0,0 +1,49 @@
+#pragma once
+
+#include <QMainWindow>
+#include <QSharedPointer>
+
+class QDragEnterEvent;
+class TextureRenderer;
+
+namespace nodegraph {
+class NodeGraph;
+class Scene;
+typedef QSharedPointer<Scene> ScenePtr;
+
+} // namespace nodegraph
+class Library;
+
+class TextureProject;
+class TextureNode;
+typedef QSharedPointer<TextureProject> TextureProjectPtr;
+typedef QSharedPointer<TextureNode> TextureNodePtr;
+
+class GraphWidget : public QMainWindow {
+    Q_OBJECT
+
+public:
+    GraphWidget();
+
+    void setTextureProject(TextureProjectPtr project);
+
+    void dragEnterEvent(QDragEnterEvent* evt);
+    void dragMoveEvent(QDragMoveEvent* event);
+    void dropEvent(QDropEvent* event);
+
+    void setTextureRenderer(TextureRenderer* renderer);
+
+    nodegraph::NodeGraph* graph;
+    // Library* library;
+    nodegraph::ScenePtr scene;
+    TextureProjectPtr project;
+
+    TextureRenderer* renderer;
+
+protected:
+    void addNode(const TextureNodePtr& node);
+
+signals:
+    void nodeSelectionChanged(const TextureNodePtr& node);
+    void nodeDoubleClicked(const TextureNodePtr& node);
+};
\ No newline at end of file
diff --git a/src/texturelab/widgets/librarywidget.cpp b/src/texturelab/widgets/librarywidget.cpp
new file mode 100644
index 00000000..844162e7
--- /dev/null
+++ b/src/texturelab/widgets/librarywidget.cpp
@@ -0,0 +1,121 @@
+#include "librarywidget.h"
+#include "../utils.h"
+#include "./libraries/library.h"
+
+#include <QFont>
+#include <QLayout>
+#include <QLineEdit>
+#include <QListWidget>
+#include <QListWidgetItem>
+#include <QMimeData>
+#include <QScrollBar>
+#include <QVBoxLayout>
+
+// https://doc.qt.io/qt-6/qmimedata.html
+// subclassing QMimeData is cleaner
+
+bool LibraryItemMimeData::hasFormat(const QString& format) const
+{
+    if (format == LIBRARY_ITEM_MIME_FORMAT)
+        return true;
+
+    return false;
+}
+
+LibraryWidget::LibraryWidget() : QWidget()
+{
+    this->setMinimumWidth(100);
+    this->setLayout(new QVBoxLayout());
+
+    // search box
+    searchBar = new QLineEdit(this);
+    searchBar->setPlaceholderText("search");
+    searchBar->setAlignment(Qt::AlignLeft);
+    connect(searchBar, &QLineEdit::textChanged,
+            [=](QString text) { qDebug() << "search changed"; });
+
+    this->layout()->addWidget(searchBar);
+
+    // list widget
+    listWidget = new LibraryListWidget();
+    listWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    this->layout()->addWidget(listWidget);
+
+    this->setLibrary(nullptr);
+}
+
+void LibraryWidget::setLibrary(Library* lib)
+{
+    QSize currentSize = QSize(90, 90);
+    this->listWidget->clear();
+
+    if (!lib)
+        return;
+
+    for (auto& libraryItem : lib->items) {
+        // for (int i = 0; i < 10; i++) {
+        QListWidgetItem* item = new QListWidgetItem;
+        item->setData(Qt::DisplayRole, libraryItem.name);
+        item->setData((int)Roles::ItemType, "LibraryItem");
+        item->setData((int)Roles::LibraryItemName, libraryItem.name);
+        // item->setData(Qt::DisplayRole, libraryItem.name);
+
+        item->setSizeHint(currentSize);
+        item->setTextAlignment(Qt::AlignCenter);
+        item->setFlags(item->flags() | Qt::ItemIsEditable);
+        // item->setIcon(QIcon(":nodes/bevel.png"));
+        item->setIcon(libraryItem.icon);
+
+        this->listWidget->addItem(item);
+    }
+}
+
+LibraryListWidget::LibraryListWidget() : QListWidget()
+{
+    setAlternatingRowColors(false);
+    setSpacing(0);
+    setViewMode(QListWidget::IconMode);
+    setIconSize(QSize(70, 70));
+    setMouseTracking(true);
+    setEditTriggers(QAbstractItemView::NoEditTriggers);
+
+    setDragDropMode(QAbstractItemView::DragDrop);
+    setDragEnabled(true);
+
+    setResizeMode(QListWidget::Adjust);
+    setDefaultDropAction(Qt::CopyAction);
+    setSelectionMode(QAbstractItemView::SingleSelection);
+
+    setWordWrap(true);
+    setGridSize(QSize(90, 90));
+
+    setContentsMargins(0, 0, 0, 0);
+
+    // setDragEnabled(true);
+    // viewport()->setAcceptDrops(true);
+    // setAcceptDrops(true);
+    setDropIndicatorShown(true);
+
+    setStyleSheet(
+        "QListView::item{ border-radius: 2px; border: 0px solid rgba(0,0,0,1); "
+        "margin-left: 6px;  }"
+        "QListView::item:hover{border: 1px solid rgba(50,150,250,1); }");
+}
+
+QMimeData*
+LibraryListWidget::mimeData(const QList<QListWidgetItem*>& items) const
+{
+    // QMimeData* data = new QMimeData();
+    // // set text for item
+    // data->setText(items[0]->data(Qt::DisplayRole).toString());
+    // data->setData("ITEM_TYPE", "LIBRARY_ITEM");
+
+    auto itemName = items[0]->data((int)Roles::LibraryItemName).toString();
+    // data->setData("LIBRARY_ITEM_NAME", itemName);
+    qDebug() << "Mime Data Dragging: " << itemName;
+
+    auto mimeData = new LibraryItemMimeData();
+    mimeData->libraryItemName = itemName;
+
+    return mimeData;
+}
\ No newline at end of file
diff --git a/src/texturelab/widgets/librarywidget.h b/src/texturelab/widgets/librarywidget.h
new file mode 100644
index 00000000..141bc5a5
--- /dev/null
+++ b/src/texturelab/widgets/librarywidget.h
@@ -0,0 +1,45 @@
+#pragma once
+
+#include <QFrame>
+#include <QListWidget>
+#include <QMimeData>
+
+class Library;
+class LibraryListWidget;
+class QLineEdit;
+
+// https://stackoverflow.com/questions/37331270/how-to-create-grid-style-qlistwidget
+class LibraryWidget : public QWidget {
+    // Q_OBJECT
+public:
+    LibraryWidget();
+    void setLibrary(Library* lib);
+
+    LibraryListWidget* listWidget;
+    QLineEdit* searchBar;
+};
+
+class LibraryItemMimeData : public QMimeData {
+    Q_OBJECT
+
+public:
+    QString libraryItemName;
+
+    virtual bool hasFormat(const QString& format) const override;
+};
+
+class LibraryListWidget : public QListWidget {
+public:
+    LibraryListWidget();
+
+protected:
+    // https://stackoverflow.com/questions/4295838/how-to-implement-drag-in-a-qlistwidget-that-contains-files
+    // QStringList mimeTypes() const
+    // {
+    //     QStringList qstrList;
+    //     qstrList.append("texturelab/library-item");
+    //     return qstrList;
+    // }
+
+    QMimeData* mimeData(const QList<QListWidgetItem*>& items) const;
+};
\ No newline at end of file
diff --git a/src/texturelab/widgets/properties/propertieswidget.cpp b/src/texturelab/widgets/properties/propertieswidget.cpp
new file mode 100644
index 00000000..36a86275
--- /dev/null
+++ b/src/texturelab/widgets/properties/propertieswidget.cpp
@@ -0,0 +1,151 @@
+#include "propertieswidget.h"
+#include "../../models.h"
+#include "../../props.h"
+#include "propwidgets.h"
+
+#include <QVBoxLayout>
+
+PropertiesWidget::PropertiesWidget() : QWidget()
+{
+    displayMode = PropertyDisplayMode::None;
+
+    textureChannelProp = new EnumProp();
+    textureChannelProp->displayName = "Texture Channel";
+    textureChannelProp->values = {"None",      "Albedo", "Normal", "Metalness",
+                                  "Roughness", "Height", "Alpha"};
+    textureChannelProp->setValue(0);
+
+    auto layout = new QVBoxLayout(this);
+    layout->addStretch(1);
+    this->setLayout(layout);
+}
+
+void PropertiesWidget::setSelectedNode(const TextureNodePtr& node)
+{
+    qDebug() << "Displaying properties for node: " << node->title;
+    this->selectedNode = node;
+
+    // clear current properties
+    this->clearSelection();
+
+    auto layout = (QVBoxLayout*)this->layout();
+
+    // add base props
+    this->addBasePropsToLayout();
+
+    // add new props to layout
+    for (auto prop : node->props) {
+        switch (prop->type) {
+        case PropType::Float: {
+            auto widget = new FloatPropWidget();
+            widget->setProp((FloatProp*)prop);
+            propWidgets.append(widget);
+
+            connect(widget, &FloatPropWidget::valueChanged, [=](double value) {
+                // qDebug() << "prop" << prop->name << " changed: " << value;
+                // set node value
+
+                node->setProp(prop->name, value);
+                project->markNodeAsDirty(node);
+
+                emit propertyUpdated(prop->name, value);
+            });
+            layout->addWidget(widget);
+
+        } break;
+        case PropType::Int: {
+            auto widget = new IntPropWidget();
+            widget->setProp((IntProp*)prop);
+            propWidgets.append(widget);
+
+            connect(widget, &IntPropWidget::valueChanged, [=](int value) {
+                // qDebug() << "prop" << prop->name << " changed: " << value;
+                // set node value
+
+                node->setProp(prop->name, value);
+                project->markNodeAsDirty(node);
+
+                emit propertyUpdated(prop->name, value);
+            });
+            layout->addWidget(widget);
+
+        } break;
+        case PropType::Enum: {
+            auto widget = new EnumPropWidget();
+            widget->setProp((EnumProp*)prop);
+            propWidgets.append(widget);
+
+            connect(widget, &EnumPropWidget::valueChanged, [=](int value) {
+                node->setProp(prop->name, value);
+                project->markNodeAsDirty(node);
+
+                emit propertyUpdated(prop->name, value);
+            });
+            layout->addWidget(widget);
+
+        } break;
+        }
+    }
+
+    layout->addStretch(1);
+}
+
+void PropertiesWidget::addBasePropsToLayout()
+{
+    auto layout = (QVBoxLayout*)this->layout();
+
+    // texture channel
+    auto widget = new EnumPropWidget();
+
+    // determine value of prop
+    auto& channels = this->project->textureChannels;
+    int channelVal = 0;
+    for (auto key : channels.keys()) {
+        if (channels[key] == selectedNode->id) {
+            channelVal = (int)key;
+            break;
+        }
+    }
+    textureChannelProp->setValue(channelVal);
+
+    widget->setProp(textureChannelProp);
+    propWidgets.append(widget);
+
+    connect(widget, &EnumPropWidget::valueChanged, [=](int value) {
+        emit this->textureChannelUpdated((TextureChannel)value,
+                                         this->selectedNode);
+    });
+    layout->addWidget(widget);
+
+    // todo: random seed
+}
+
+void PropertiesWidget::clearSelection()
+{
+    displayMode = PropertyDisplayMode::None;
+
+    auto layout = this->layout();
+
+    // clear widget
+    for (auto widget : propWidgets) {
+        widget->hide();
+        widget->deleteLater();
+    }
+
+    // remove all other items (todo: delete them)
+    while (layout->count() > 0) {
+        auto item = layout->itemAt(0);
+        layout->removeItem(item);
+
+        auto widget = item->widget();
+        if (widget)
+            widget->deleteLater();
+    }
+
+    propWidgets.clear();
+}
+
+void PropertiesWidget::setProject(const TextureProjectPtr& project)
+{
+    this->project = project;
+}
\ No newline at end of file
diff --git a/src/texturelab/widgets/properties/propertieswidget.h b/src/texturelab/widgets/properties/propertieswidget.h
new file mode 100644
index 00000000..a8b46eb4
--- /dev/null
+++ b/src/texturelab/widgets/properties/propertieswidget.h
@@ -0,0 +1,47 @@
+#pragma once
+
+#include <QVector>
+#include <QWidget>
+
+class TextureProject;
+class TextureNode;
+typedef QSharedPointer<TextureProject> TextureProjectPtr;
+typedef QSharedPointer<TextureNode> TextureNodePtr;
+
+class EnumProp;
+class FloatProp;
+
+enum class TextureChannel : int;
+
+enum class PropertyDisplayMode { None, Node, Frame, Comment };
+
+class PropertiesWidget : public QWidget {
+
+    Q_OBJECT
+
+    PropertyDisplayMode displayMode;
+    QVector<QWidget*> propWidgets;
+
+    TextureProjectPtr project;
+    TextureNodePtr selectedNode;
+
+    // base props
+    EnumProp* textureChannelProp;
+    FloatProp* randomSeedProp;
+
+public:
+    PropertiesWidget();
+
+    void setSelectedNode(const TextureNodePtr& node);
+    void clearSelection();
+
+    void setProject(const TextureProjectPtr& project);
+
+private:
+    void addBasePropsToLayout();
+
+signals:
+    void propertyUpdated(const QString& name, const QVariant& value);
+    void textureChannelUpdated(const TextureChannel& name,
+                               const TextureNodePtr& node);
+};
\ No newline at end of file
diff --git a/src/texturelab/widgets/properties/propwidgets.cpp b/src/texturelab/widgets/properties/propwidgets.cpp
new file mode 100644
index 00000000..d00dedcf
--- /dev/null
+++ b/src/texturelab/widgets/properties/propwidgets.cpp
@@ -0,0 +1,230 @@
+#include "propwidgets.h"
+#include "../../models.h"
+#include "../../props.h"
+
+#include <QComboBox>
+#include <QDoubleSpinBox>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QPushButton>
+#include <QSlider>
+#include <QSpinBox>
+#include <QVBoxLayout>
+
+const int SLIDER_MAX = 1000;
+
+// FLOAT PROP WIDGET
+// https://stackoverflow.com/a/19007951
+FloatPropWidget::FloatPropWidget()
+{
+    prop = nullptr;
+
+    auto vlayout = new QVBoxLayout(this);
+    this->setLayout(vlayout);
+
+    // label
+    label = new QLabel(this);
+    label->setText("");
+    vlayout->addWidget(label);
+
+    // slider
+    slider = new QSlider(Qt::Horizontal, this);
+    slider->setMinimum(0);
+    slider->setMaximum(SLIDER_MAX);
+    slider->setSingleStep(1);
+
+    spinbox = new QDoubleSpinBox(this);
+
+    auto hbox = new QHBoxLayout();
+    hbox->addWidget(slider);
+    hbox->addWidget(spinbox);
+
+    vlayout->addLayout(hbox);
+
+    this->setFixedHeight(80);
+
+    connect(slider, &QSlider::valueChanged, [=](int val) {
+        auto percent = val / (float)SLIDER_MAX;
+        if (prop) {
+            auto range = prop->maxValue - prop->minValue;
+            auto finalValue = prop->minValue + range * percent;
+            spinbox->setValue(finalValue);
+
+            emit valueChanged(finalValue);
+        }
+    });
+
+    connect(spinbox, &QDoubleSpinBox::valueChanged, [=](double val) {
+        if (prop) {
+            auto range = prop->maxValue - prop->minValue;
+            auto finalValue = (val / range) * SLIDER_MAX;
+
+            slider->setValue(finalValue);
+
+            emit valueChanged(val);
+        }
+    });
+}
+
+void FloatPropWidget::setProp(FloatProp* prop)
+{
+    label->setText(prop->displayName);
+
+    spinbox->setMinimum(prop->minValue);
+    spinbox->setMaximum(prop->maxValue);
+    spinbox->setSingleStep(prop->step);
+    spinbox->setValue(prop->value);
+
+    auto range = prop->maxValue - prop->minValue;
+    auto finalValue = (prop->value / range) * SLIDER_MAX;
+
+    slider->setValue(finalValue);
+
+    this->prop = prop;
+}
+
+// INT PROP WIDGET
+// https://stackoverflow.com/a/19007951
+IntPropWidget::IntPropWidget()
+{
+    prop = nullptr;
+
+    auto vlayout = new QVBoxLayout(this);
+    this->setLayout(vlayout);
+
+    // label
+    label = new QLabel(this);
+    label->setText("");
+    vlayout->addWidget(label);
+
+    // slider
+    slider = new QSlider(Qt::Horizontal, this);
+    slider->setMinimum(0);
+    slider->setMaximum(SLIDER_MAX);
+    slider->setSingleStep(1);
+
+    spinbox = new QSpinBox(this);
+
+    auto hbox = new QHBoxLayout();
+    hbox->addWidget(slider);
+    hbox->addWidget(spinbox);
+
+    vlayout->addLayout(hbox);
+
+    this->setFixedHeight(80);
+
+    connect(slider, &QSlider::valueChanged, [=](int val) {
+        auto percent = val / (float)SLIDER_MAX;
+        if (prop) {
+            spinbox->setValue(val);
+
+            emit valueChanged(val);
+        }
+    });
+
+    connect(spinbox, &QSpinBox::valueChanged, [=](int val) {
+        if (prop) {
+            slider->setValue(val);
+
+            emit valueChanged(val);
+        }
+    });
+}
+
+void IntPropWidget::setProp(IntProp* prop)
+{
+    label->setText(prop->displayName);
+
+    spinbox->setMinimum(prop->minValue);
+    spinbox->setMaximum(prop->maxValue);
+    spinbox->setSingleStep(prop->step);
+    spinbox->setValue(prop->value);
+
+    slider->setValue(prop->value);
+    slider->setMinimum(prop->minValue);
+    slider->setMaximum(prop->maxValue);
+    slider->setSingleStep(prop->step);
+
+    this->prop = prop;
+}
+
+// ENUM PROP WIDGET
+// https://stackoverflow.com/a/19007951
+EnumPropWidget::EnumPropWidget()
+{
+    prop = nullptr;
+
+    auto vlayout = new QVBoxLayout(this);
+    this->setLayout(vlayout);
+
+    // label
+    label = new QLabel(this);
+    label->setText("");
+    vlayout->addWidget(label);
+
+    // slider
+    comboBox = new QComboBox(this);
+    vlayout->addWidget(comboBox);
+
+    this->setFixedHeight(80);
+
+    connect(comboBox, &QComboBox::currentIndexChanged,
+            [=](int val) { emit valueChanged(val); });
+}
+
+void EnumPropWidget::setProp(EnumProp* prop)
+{
+    label->setText(prop->displayName);
+
+    for (auto item : prop->values) {
+        comboBox->addItem(item);
+    }
+
+    comboBox->setCurrentIndex(prop->index);
+
+    this->prop = prop;
+}
+
+// BOOL PROP WIDGET
+// https://stackoverflow.com/a/19007951
+BoolPropWidget::BoolPropWidget()
+{
+    prop = nullptr;
+
+    auto vlayout = new QVBoxLayout(this);
+    this->setLayout(vlayout);
+
+    // label
+    label = new QLabel(this);
+    label->setText("");
+    vlayout->addWidget(label);
+
+    // slider
+    button = new QPushButton(this);
+    vlayout->addWidget(button);
+
+    this->setFixedHeight(80);
+
+    connect(button, &QPushButton::pressed, [=]() {
+        setValue(!this->value);
+        emit valueChanged(this->value);
+    });
+}
+
+void BoolPropWidget::setProp(BoolProp* prop)
+{
+    label->setText(prop->displayName);
+
+    setValue(prop->value);
+}
+
+void BoolPropWidget::setValue(bool value)
+{
+    this->value = value;
+    if (value) {
+        button->setText("True");
+    }
+    else {
+        button->setText("False");
+    }
+}
\ No newline at end of file
diff --git a/src/texturelab/widgets/properties/propwidgets.h b/src/texturelab/widgets/properties/propwidgets.h
new file mode 100644
index 00000000..3aea0dcf
--- /dev/null
+++ b/src/texturelab/widgets/properties/propwidgets.h
@@ -0,0 +1,80 @@
+#include <QVector>
+#include <QWidget>
+
+class QLabel;
+class QSlider;
+class QDoubleSpinBox;
+class QSpinBox;
+class QComboBox;
+class QPushButton;
+
+class FloatProp;
+class IntProp;
+class EnumProp;
+class BoolProp;
+
+// https://stackoverflow.com/a/19007951
+class FloatPropWidget : public QWidget {
+    Q_OBJECT
+
+    QLabel* label;
+    QSlider* slider;
+    QDoubleSpinBox* spinbox;
+
+    FloatProp* prop;
+
+public:
+    FloatPropWidget();
+    void setProp(FloatProp* prop);
+signals:
+    void valueChanged(float);
+};
+
+class IntPropWidget : public QWidget {
+    Q_OBJECT
+
+    QLabel* label;
+    QSlider* slider;
+    QSpinBox* spinbox;
+
+    IntProp* prop;
+
+public:
+    IntPropWidget();
+    void setProp(IntProp* prop);
+signals:
+    void valueChanged(long);
+};
+
+class EnumPropWidget : public QWidget {
+    Q_OBJECT
+
+    QLabel* label;
+    QComboBox* comboBox;
+
+    EnumProp* prop;
+
+public:
+    EnumPropWidget();
+    void setProp(EnumProp* prop);
+signals:
+    void valueChanged(int);
+};
+
+class BoolPropWidget : public QWidget {
+    Q_OBJECT
+
+    QLabel* label;
+    QPushButton* button;
+
+    BoolProp* prop;
+    bool value;
+
+    void setValue(bool value);
+
+public:
+    BoolPropWidget();
+    void setProp(BoolProp* prop);
+signals:
+    void valueChanged(bool);
+};
\ No newline at end of file
diff --git a/src/texturelab/widgets/view2dwidget.cpp b/src/texturelab/widgets/view2dwidget.cpp
new file mode 100644
index 00000000..3f435d21
--- /dev/null
+++ b/src/texturelab/widgets/view2dwidget.cpp
@@ -0,0 +1,266 @@
+#include "view2dwidget.h"
+#include <QLayout>
+
+#include <QtGui/QBrush>
+#include <QtGui/QPen>
+#include <QtWidgets/QMenu>
+
+#include <QtCore/QPointF>
+#include <QtCore/QRectF>
+
+#include <QGraphicsView>
+#include <QWheelEvent>
+
+#include <QOpenGLFramebufferObject>
+#include <QOpenGLWidget>
+#include <QPaintEngine>
+
+#include "./graphics/texturerenderer.h"
+#include "./models.h"
+#include "./utils.h"
+
+const QColor BackgroundColor(53, 53, 53);
+const QColor FineGridColor(60, 60, 60);
+const QColor CoarseGridColor(25, 25, 25);
+
+View2DWidget::View2DWidget() : QMainWindow()
+{
+    graph = new View2DGraph(this);
+    this->setCentralWidget(graph);
+}
+
+void View2DWidget::setSelectedNode(const TextureNodePtr& node)
+{
+    this->node = node;
+    this->graph->setSelectedNode(node);
+}
+
+void View2DWidget::clearSelection() {}
+
+void View2DWidget::reRenderNode() { this->graph->scene()->invalidate(); }
+
+void View2DWidget::setTextureRenderer(TextureRenderer* renderer)
+{
+    connect(renderer, &TextureRenderer::thumbnailGenerated,
+            [=](const QString& nodeId, GLint texId, const QPixmap& pixmap) {
+                if (!!node && node->id == nodeId) {
+                    this->graph->scene()->invalidate();
+                }
+            });
+}
+
+View2DWidget::~View2DWidget() { delete graph; }
+
+// GRAPH
+View2DGraph::View2DGraph(QWidget* parent) : QGraphicsView(parent)
+{
+    // https://doc.qt.io/qt-6.2/graphicsview.html#opengl-rendering
+    auto gl = new QOpenGLWidget();
+    QSurfaceFormat format;
+    format.setSamples(4);
+    gl->setFormat(format);
+    this->setViewport(gl);
+
+    setDragMode(QGraphicsView::ScrollHandDrag);
+    setRenderHint(QPainter::Antialiasing);
+
+    setBackgroundBrush(QColor(33, 33, 33));
+
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
+
+    setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+
+    _scene = new QGraphicsScene(this);
+    this->setScene(_scene);
+
+    preview = new NodePreviewGraphicsItem();
+    this->_scene->addItem(preview);
+    // this->fitInView(preview, Qt::KeepAspectRatio);
+    scale(0.3, 0.3);
+    preview->hide();
+}
+
+// view manipulation
+void View2DGraph::wheelEvent(QWheelEvent* event)
+{
+    QPoint delta = event->angleDelta();
+
+    if (delta.y() == 0) {
+        event->ignore();
+        return;
+    }
+
+    double const d = delta.y() / std::abs(delta.y());
+
+    if (d > 0.0)
+        scaleUp();
+    else
+        scaleDown();
+};
+
+void View2DGraph::scaleUp()
+{
+    double const step = 1.2;
+    double const factor = std::pow(step, 1.0);
+
+    QTransform t = transform();
+
+    if (t.m11() > 2.0)
+        return;
+
+    scale(factor, factor);
+}
+
+void View2DGraph::scaleDown()
+{
+    double const step = 1.2;
+    double const factor = std::pow(step, -1.0);
+
+    scale(factor, factor);
+}
+
+// void View2DGraph::keyPressEvent(QKeyEvent* event){};
+// void View2DGraph::keyReleaseEvent(QKeyEvent* event){};
+void View2DGraph::mousePressEvent(QMouseEvent* event)
+{
+    if (event->button() == Qt::MiddleButton &&
+        scene()->mouseGrabberItem() == nullptr) {
+        _clickPos = mapToScene(event->pos());
+        setDragMode(QGraphicsView::NoDrag);
+    }
+    QGraphicsView::mousePressEvent(event);
+}
+
+void View2DGraph::mouseMoveEvent(QMouseEvent* event)
+{
+
+    if (event->buttons() == Qt::MiddleButton) {
+        QPointF difference = _clickPos - mapToScene(event->pos());
+        setSceneRect(sceneRect().translated(difference.x(), difference.y()));
+    }
+    QGraphicsView::mouseMoveEvent(event);
+}
+
+void View2DGraph::mouseReleaseEvent(QMouseEvent* event)
+{
+    if (event->button() == Qt::MiddleButton) {
+    }
+    QGraphicsView::mouseReleaseEvent(event);
+}
+
+void View2DGraph::setSelectedNode(const TextureNodePtr& node)
+{
+    this->preview->setNode(node);
+    this->scene()->invalidate();
+};
+
+void View2DGraph::clearSelection(){};
+
+void View2DGraph::drawBackground(QPainter* painter, const QRectF& r)
+{
+    auto type = painter->paintEngine()->type();
+    if (type != QPaintEngine::OpenGL && type != QPaintEngine::OpenGL2) {
+        qWarning() << "background paint engine needs to be OPENGL!";
+        // return;
+    }
+
+    QGraphicsView::drawBackground(painter, r);
+    painter->setRenderHint(QPainter::Antialiasing);
+
+    auto drawGrid = [&](double gridStep) {
+        QRect windowRect = rect();
+        QPointF tl = mapToScene(windowRect.topLeft());
+        QPointF br = mapToScene(windowRect.bottomRight());
+
+        double left = std::floor(tl.x() / gridStep - 0.5);
+        double right = std::floor(br.x() / gridStep + 1.0);
+        double bottom = std::floor(tl.y() / gridStep - 0.5);
+        double top = std::floor(br.y() / gridStep + 1.0);
+
+        // vertical lines
+        for (int xi = int(left); xi <= int(right); ++xi) {
+            QLineF line(xi * gridStep, bottom * gridStep, xi * gridStep,
+                        top * gridStep);
+
+            painter->drawLine(line);
+        }
+
+        // horizontal lines
+        for (int yi = int(bottom); yi <= int(top); ++yi) {
+            QLineF line(left * gridStep, yi * gridStep, right * gridStep,
+                        yi * gridStep);
+            painter->drawLine(line);
+        }
+    };
+
+    QBrush bBrush = backgroundBrush();
+
+    // QPen pfine(FineGridColor, 1.0);
+
+    // painter->setPen(pfine);
+    // drawGrid(15);
+
+    QPen p(CoarseGridColor, 1.0);
+    painter->setPen(p);
+    drawGrid(1000);
+};
+
+// NODE PREVIEW
+NodePreviewGraphicsItem::NodePreviewGraphicsItem() {}
+
+QRectF NodePreviewGraphicsItem::boundingRect() const
+{
+    return QRectF(0, 0, 1000, 1000);
+}
+
+void NodePreviewGraphicsItem::setNode(const TextureNodePtr& node)
+{
+    this->node = node;
+    if (!!node)
+        this->show();
+}
+void NodePreviewGraphicsItem::clearNode() { this->node.reset(); }
+
+void NodePreviewGraphicsItem::paint(QPainter* painter,
+                                    QStyleOptionGraphicsItem const* option,
+                                    QWidget* widget)
+{
+    // // https://doc.qt.io/qt-5/qpainter.html#beginNativePainting
+    // https://github.com/liff-engineer/WeeklyARTS/blob/d8605aa3bfb2641d2a13621262024a1edff7b661/2018_9_4/Mixin2D%263DinQt.md
+    auto type = painter->paintEngine()->type();
+    if (type != QPaintEngine::OpenGL && type != QPaintEngine::OpenGL2) {
+        qWarning() << "Paint engine needs to be OPENGL!";
+        // return;
+    }
+
+    auto rect = boundingRect();
+
+    if (!!node) {
+        // // https://doc.qt.io/qt-5/qpainter.html#beginNativePainting
+        painter->beginNativePainting();
+
+        // glColor4f(1.0f, 0.0f, 0.0f, 1.0);
+        glEnable(GL_TEXTURE_2D);
+
+        glActiveTexture(0);
+        glBindTexture(GL_TEXTURE_2D, node->texture->texture());
+        glBegin(GL_QUADS);
+        glTexCoord2f(0, 0);
+        glVertex2f(0, 0);
+
+        glTexCoord2f(1, 0);
+        glVertex2f(rect.width(), 0);
+
+        glTexCoord2f(1, 1);
+        glVertex2f(rect.width(), rect.height());
+
+        glTexCoord2f(0, 1);
+        glVertex2f(0, rect.height());
+        glEnd();
+
+        painter->endNativePainting();
+    }
+}
\ No newline at end of file
diff --git a/src/texturelab/widgets/view2dwidget.h b/src/texturelab/widgets/view2dwidget.h
new file mode 100644
index 00000000..87a0250c
--- /dev/null
+++ b/src/texturelab/widgets/view2dwidget.h
@@ -0,0 +1,88 @@
+#pragma once
+
+#include <QGraphicsItem>
+#include <QGraphicsView>
+#include <QMainWindow>
+#include <QWidget>
+
+class QWidget;
+class QWheelEvent;
+class QKeyEvent;
+class QMouseEvent;
+class QPainter;
+class QWheelEvent;
+class QShowEvent;
+class QGraphicsScene;
+class QStyleOptionGraphicsItem;
+class TextureRenderer;
+
+class TextureProject;
+class TextureNode;
+typedef QSharedPointer<TextureProject> TextureProjectPtr;
+typedef QSharedPointer<TextureNode> TextureNodePtr;
+class View2DGraph;
+
+class NodePreviewGraphicsItem;
+
+class View2DWidget : public QMainWindow {
+    TextureNodePtr node;
+
+public:
+    View2DWidget();
+
+    void setSelectedNode(const TextureNodePtr& node);
+    void clearSelection();
+
+    void setTextureRenderer(TextureRenderer* renderer);
+
+    void reRenderNode();
+
+    View2DGraph* graph = nullptr;
+
+    virtual ~View2DWidget();
+};
+
+class View2DGraph : public QGraphicsView {
+    Q_OBJECT
+
+    TextureNodePtr node;
+    QGraphicsScene* _scene;
+
+public:
+    View2DGraph(QWidget* parent);
+
+    void scaleUp();
+    void scaleDown();
+
+    void setSelectedNode(const TextureNodePtr& node);
+    void clearSelection();
+
+protected:
+    // view manipulation
+    void wheelEvent(QWheelEvent* event) override;
+    // void keyPressEvent(QKeyEvent* event) override;
+    // void keyReleaseEvent(QKeyEvent* event) override;
+    void mousePressEvent(QMouseEvent* event) override;
+    void mouseMoveEvent(QMouseEvent* event) override;
+    void mouseReleaseEvent(QMouseEvent* event) override;
+
+    void drawBackground(QPainter* painter, const QRectF& r) override;
+
+private:
+    QPointF _clickPos;
+    NodePreviewGraphicsItem* preview = nullptr;
+};
+
+class NodePreviewGraphicsItem : public QGraphicsItem {
+    TextureNodePtr node;
+
+public:
+    NodePreviewGraphicsItem();
+    void setNode(const TextureNodePtr& node);
+    void clearNode();
+    QRectF boundingRect() const override;
+
+protected:
+    void paint(QPainter* painter, QStyleOptionGraphicsItem const* option,
+               QWidget* widget = 0) override;
+};
\ No newline at end of file
diff --git a/src/texturelab/widgets/view3dwidget.cpp b/src/texturelab/widgets/view3dwidget.cpp
new file mode 100644
index 00000000..37dc51c8
--- /dev/null
+++ b/src/texturelab/widgets/view3dwidget.cpp
@@ -0,0 +1,12 @@
+#include "view3dwidget.h"
+#include "viewer3d.h"
+
+View3DWidget::View3DWidget()
+{
+    this->viewer = new Viewer3D();
+    this->setCentralWidget(viewer);
+
+    this->viewer->setDefaultEnvironment(":env/cave_wall_1k.hdr");
+}
+
+void View3DWidget::reRender() { this->viewer->reRender(); }
\ No newline at end of file
diff --git a/src/texturelab/widgets/view3dwidget.h b/src/texturelab/widgets/view3dwidget.h
new file mode 100644
index 00000000..e382e3e2
--- /dev/null
+++ b/src/texturelab/widgets/view3dwidget.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <QFrame>
+#include <QMainWindow>
+
+class Viewer3D;
+class View3DWidget : public QMainWindow {
+public:
+    View3DWidget();
+    Viewer3D* viewer;
+
+    void reRender();
+};
\ No newline at end of file
diff --git a/src/unobserve.ts b/src/unobserve.ts
deleted file mode 100644
index 6b4a4858..00000000
--- a/src/unobserve.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import { Vue } from "vue-property-decorator";
-
-const Observer = new Vue().$data.__ob__.constructor;
-
-// prevent Vue from auto-binding to large objects
-// causes app to crash when cpu-based nodes with large
-// arrays get observed
-// https://github.com/rpkilby/vue-nonreactive/blob/master/vue-nonreactive.js
-export function unobserve(obj): any {
-	// unobserve pr
-	if (obj) obj.__ob__ = new Observer({});
-
-	return obj;
-}
diff --git a/src/utils/inspectelement.ts b/src/utils/inspectelement.ts
deleted file mode 100644
index 138b307f..00000000
--- a/src/utils/inspectelement.ts
+++ /dev/null
@@ -1,27 +0,0 @@
-const remote = require("@electron/remote");
-const Menu = remote.Menu;
-const MenuItem = remote.MenuItem;
-
-let rightClickPosition = null;
-if (process.env.NODE_ENV != "production") {
-	const menu = new remote.Menu();
-	const menuItem = new MenuItem({
-		label: "Inspect Element",
-		click: () => {
-			remote
-				.getCurrentWindow()
-				.webContents.inspectElement(rightClickPosition.x, rightClickPosition.y);
-		}
-	});
-	menu.append(menuItem);
-
-	window.addEventListener(
-		"contextmenu",
-		e => {
-			e.preventDefault();
-			rightClickPosition = { x: e.x, y: e.y };
-			menu.popup();
-		},
-		false
-	);
-}
diff --git a/src/utils/propgroupcache.ts b/src/utils/propgroupcache.ts
deleted file mode 100644
index 01a73c44..00000000
--- a/src/utils/propgroupcache.ts
+++ /dev/null
@@ -1,58 +0,0 @@
-export class PropGroupCache {
-	// private static _instance;
-	// public static get instance() {
-	// 	if (PropCache._instance == null) PropCache._instance = new PropCache();
-
-	// 	return PropCache._instance;
-	// }
-
-	static states: Map<string, Map<string, boolean>> = new Map<
-		string,
-		Map<string, boolean>
-	>();
-
-	static scrollLevels: Map<string, number> = new Map<string, number>();
-
-	static getCollapseState(
-		nodeType: string,
-		groupName: string,
-		defaultValue: boolean
-	): boolean {
-		const states = PropGroupCache.states;
-
-		if (!states.has(nodeType)) return defaultValue;
-
-		const nodeStates = states.get(nodeType);
-
-		if (!nodeStates.has(groupName)) return defaultValue;
-
-		return nodeStates.get(groupName);
-	}
-
-	static setCollapseState(
-		nodeType: string,
-		groupName: string,
-		val: boolean
-	): void {
-		const states = PropGroupCache.states;
-
-		let nodeStates: Map<string, boolean> = null;
-		if (states.has(nodeType)) nodeStates = states.get(nodeType);
-		else nodeStates = new Map<string, boolean>();
-
-		nodeStates.set(groupName, val);
-
-		states.set(nodeType, nodeStates);
-	}
-
-	static setScrollLevel(nodeName: string, level: number) {
-		PropGroupCache.scrollLevels.set(nodeName, level);
-	}
-
-	static getScrollLevel(nodeName: string, defaultLevel: number): number {
-		if (PropGroupCache.scrollLevels.has(nodeName))
-			return PropGroupCache.scrollLevels.get(nodeName);
-
-		return defaultLevel;
-	}
-}
diff --git a/src/viewer3d/CMakeLists.txt b/src/viewer3d/CMakeLists.txt
new file mode 100644
index 00000000..6a580bfd
--- /dev/null
+++ b/src/viewer3d/CMakeLists.txt
@@ -0,0 +1,95 @@
+
+cmake_minimum_required(VERSION 3.5)
+
+
+find_package(QT NAMES Qt6 Qt5 COMPONENTS Core REQUIRED)
+find_package(Qt${QT_VERSION_MAJOR} 5.5 COMPONENTS Core Gui Widgets OpenGLWidgets REQUIRED)
+if (UNIX AND NOT APPLE)
+    include_directories(${Qt${QT_VERSION_MAJOR}Gui_PRIVATE_INCLUDE_DIRS})
+endif()
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(SRCS
+    main.cpp
+    viewer3d.cpp
+    iblsampler.cpp
+    shadercache.cpp
+    gltf/gltf.cpp
+    geometry/sphere.cpp
+    renderer/renderer.cpp
+)
+set(HEADERS
+    viewer3d.h
+    iblsampler.h
+    shadercache.h
+    geometry/geometry.h
+    renderer/renderer.h
+    gltf/json.hpp
+    gltf/tiny_gltf.h
+    gltf/stb_image.h
+)
+
+set(RESOURCES
+    ./viewerassets.qrc)
+
+# library
+add_library(viewer3d STATIC ${SRCS} ${HEADERS} ${RESOURCES})
+target_link_libraries(viewer3d PRIVATE Qt${QT_VERSION_MAJOR}::Core 
+                                        Qt${QT_VERSION_MAJOR}::Gui 
+                                        Qt${QT_VERSION_MAJOR}::OpenGLWidgets 
+                                        Qt${QT_VERSION_MAJOR}::Widgets)
+
+
+set_target_properties(viewer3d PROPERTIES
+    AUTOMOC ON
+    AUTORCC ON
+    CXX_EXTENSIONS OFF
+    EXPORT_NAME "3d Viewer"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+)
+
+if(QT_VERSION_MAJOR STREQUAL "5")
+    set_target_properties(viewer3d PROPERTIES
+        CXX_STANDARD 14
+        CXX_STANDARD_REQUIRED ON)
+elseif(QT_VERSION_MAJOR STREQUAL "6")
+    set_target_properties(viewer3d PROPERTIES
+        CXX_STANDARD 17
+        CXX_STANDARD_REQUIRED ON)
+endif()
+
+# EXE for testing purposes
+add_executable(viewer3d_app
+            ${HEADERS}
+            ${SRCS}
+            main.cpp
+            ${RESOURCES}
+        )
+target_link_libraries(viewer3d_app PRIVATE Qt${QT_VERSION_MAJOR}::Core
+                                            Qt${QT_VERSION_MAJOR}::Gui
+                                            Qt${QT_VERSION_MAJOR}::OpenGLWidgets 
+                                            Qt${QT_VERSION_MAJOR}::Widgets)
+
+
+set_target_properties(viewer3d_app PROPERTIES
+    AUTOMOC ON
+    AUTORCC ON
+    CXX_EXTENSIONS OFF
+    EXPORT_NAME "Viewer Sample App"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+)
+
+if(QT_VERSION_MAJOR STREQUAL "5")
+    set_target_properties(viewer3d_app PROPERTIES
+        CXX_STANDARD 14
+        CXX_STANDARD_REQUIRED ON)
+elseif(QT_VERSION_MAJOR STREQUAL "6")
+    set_target_properties(viewer3d_app PROPERTIES
+        CXX_STANDARD 17
+        CXX_STANDARD_REQUIRED ON)
+endif()
\ No newline at end of file
diff --git a/src/viewer3d/README.md b/src/viewer3d/README.md
new file mode 100644
index 00000000..e47a0a22
--- /dev/null
+++ b/src/viewer3d/README.md
@@ -0,0 +1,9 @@
+reference:
+https://github.com/SaschaWillems/Vulkan-glTF-PBR
+https://github.com/syoyo/tinygltf/tree/release/examples/glview
+
+steps:
+load gltf model with tangents
+load hdr texture
+generate hdr textures
+pass textures to shaders
diff --git a/src/viewer3d/assets/animation.glsl b/src/viewer3d/assets/animation.glsl
new file mode 100644
index 00000000..7b40fcde
--- /dev/null
+++ b/src/viewer3d/assets/animation.glsl
@@ -0,0 +1,211 @@
+#ifdef HAS_MORPH_TARGETS
+uniform highp sampler2DArray u_MorphTargetsSampler;
+#endif
+
+#ifdef USE_MORPHING
+uniform float u_morphWeights[WEIGHT_COUNT];
+#endif
+
+#ifdef HAS_JOINTS_0_VEC4
+in vec4 a_joints_0;
+#endif
+
+#ifdef HAS_JOINTS_1_VEC4
+in vec4 a_joints_1;
+#endif
+
+#ifdef HAS_WEIGHTS_0_VEC4
+in vec4 a_weights_0;
+#endif
+
+#ifdef HAS_WEIGHTS_1_VEC4
+in vec4 a_weights_1;
+#endif
+
+#ifdef USE_SKINNING
+uniform sampler2D u_jointsSampler;
+#endif
+
+#ifdef USE_SKINNING
+
+mat4 getMatrixFromTexture(sampler2D s, int index)
+{
+    mat4 result = mat4(1);
+    int texSize = textureSize(s, 0)[0];
+    int pixelIndex = index * 4;
+    for (int i = 0; i < 4; ++i)
+    {
+        int x = (pixelIndex + i) % texSize;
+        //Rounding mode of integers is undefined:
+        //https://www.khronos.org/registry/OpenGL/specs/es/3.0/GLSL_ES_Specification_3.00.pdf (section 12.33)
+        int y = (pixelIndex + i - x) / texSize; 
+        result[i] = texelFetch(s, ivec2(x,y), 0);
+    }
+    return result;
+}
+
+mat4 getSkinningMatrix()
+{
+    mat4 skin = mat4(0);
+
+#if defined(HAS_WEIGHTS_0_VEC4) && defined(HAS_JOINTS_0_VEC4)
+    skin +=
+        a_weights_0.x * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.x) * 2) +
+        a_weights_0.y * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.y) * 2) +
+        a_weights_0.z * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.z) * 2) +
+        a_weights_0.w * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.w) * 2);
+#endif
+
+#if defined(HAS_WEIGHTS_1_VEC4) && defined(HAS_JOINTS_1_VEC4)
+    skin +=
+        a_weights_1.x * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.x) * 2) +
+        a_weights_1.y * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.y) * 2) +
+        a_weights_1.z * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.z) * 2) +
+        a_weights_1.w * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.w) * 2);
+#endif
+    if (skin == mat4(0)) { 
+        return mat4(1); 
+    }
+    return skin;
+}
+
+
+mat4 getSkinningNormalMatrix()
+{
+    mat4 skin = mat4(0);
+
+#if defined(HAS_WEIGHTS_0_VEC4) && defined(HAS_JOINTS_0_VEC4)
+    skin +=
+        a_weights_0.x * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.x) * 2 + 1) +
+        a_weights_0.y * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.y) * 2 + 1) +
+        a_weights_0.z * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.z) * 2 + 1) +
+        a_weights_0.w * getMatrixFromTexture(u_jointsSampler, int(a_joints_0.w) * 2 + 1);
+#endif
+
+#if defined(HAS_WEIGHTS_1_VEC4) && defined(HAS_JOINTS_1_VEC4)
+    skin +=
+        a_weights_1.x * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.x) * 2 + 1) +
+        a_weights_1.y * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.y) * 2 + 1) +
+        a_weights_1.z * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.z) * 2 + 1) +
+        a_weights_1.w * getMatrixFromTexture(u_jointsSampler, int(a_joints_1.w) * 2 + 1);
+#endif
+    if (skin == mat4(0)) { 
+        return mat4(1); 
+    }
+    return skin;
+}
+
+#endif // !USE_SKINNING
+
+
+#ifdef USE_MORPHING
+
+#ifdef HAS_MORPH_TARGETS
+vec4 getDisplacement(int vertexID, int targetIndex, int texSize)
+{
+    int x = vertexID % texSize;
+    //Rounding mode of integers is undefined:
+    //https://www.khronos.org/registry/OpenGL/specs/es/3.0/GLSL_ES_Specification_3.00.pdf (section 12.33)
+    int y = (vertexID - x) / texSize; 
+    return texelFetch(u_MorphTargetsSampler, ivec3(x, y, targetIndex), 0);
+}
+#endif
+
+
+vec4 getTargetPosition(int vertexID)
+{
+    vec4 pos = vec4(0);
+#ifdef HAS_MORPH_TARGET_POSITION
+    int texSize = textureSize(u_MorphTargetsSampler, 0)[0];
+    for(int i = 0; i < WEIGHT_COUNT; i++)
+    {
+        vec4 displacement = getDisplacement(vertexID, MORPH_TARGET_POSITION_OFFSET + i, texSize);
+        pos += u_morphWeights[i] * displacement;
+    }
+#endif
+
+    return pos;
+}
+
+vec3 getTargetNormal(int vertexID)
+{
+    vec3 normal = vec3(0);
+
+#ifdef HAS_MORPH_TARGET_NORMAL
+    int texSize = textureSize(u_MorphTargetsSampler, 0)[0];
+    for(int i = 0; i < WEIGHT_COUNT; i++)
+    {
+        vec3 displacement = getDisplacement(vertexID, MORPH_TARGET_NORMAL_OFFSET + i, texSize).xyz;
+        normal += u_morphWeights[i] * displacement;
+    }
+#endif
+
+    return normal;
+}
+
+
+vec3 getTargetTangent(int vertexID)
+{
+    vec3 tangent = vec3(0);
+
+#ifdef HAS_MORPH_TARGET_TANGENT
+    int texSize = textureSize(u_MorphTargetsSampler, 0)[0];
+    for(int i = 0; i < WEIGHT_COUNT; i++)
+    {
+        vec3 displacement = getDisplacement(vertexID, MORPH_TARGET_TANGENT_OFFSET + i, texSize).xyz;
+        tangent += u_morphWeights[i] * displacement;
+    }
+#endif
+
+    return tangent;
+}
+
+vec2 getTargetTexCoord0(int vertexID)
+{
+    vec2 uv = vec2(0);
+
+#ifdef HAS_MORPH_TARGET_TEXCOORD_0
+    int texSize = textureSize(u_MorphTargetsSampler, 0)[0];
+    for(int i = 0; i < WEIGHT_COUNT; i++)
+    {
+        vec2 displacement = getDisplacement(vertexID, MORPH_TARGET_TEXCOORD_0_OFFSET + i, texSize).xy;
+        uv += u_morphWeights[i] * displacement;
+    }
+#endif
+
+    return uv;
+}
+
+vec2 getTargetTexCoord1(int vertexID)
+{
+    vec2 uv = vec2(0);
+
+#ifdef HAS_MORPH_TARGET_TEXCOORD_1
+    int texSize = textureSize(u_MorphTargetsSampler, 0)[0];
+    for(int i = 0; i < WEIGHT_COUNT; i++)
+    {
+        vec2 displacement = getDisplacement(vertexID, MORPH_TARGET_TEXCOORD_1_OFFSET + i, texSize).xy;
+        uv += u_morphWeights[i] * displacement;
+    }
+#endif
+
+    return uv;
+}
+
+vec4 getTargetColor0(int vertexID)
+{
+    vec4 color = vec4(0);
+
+#ifdef HAS_MORPH_TARGET_COLOR_0
+    int texSize = textureSize(u_MorphTargetsSampler, 0)[0];
+    for(int i = 0; i < WEIGHT_COUNT; i++)
+    {
+        vec4 displacement = getDisplacement(vertexID, MORPH_TARGET_COLOR_0_OFFSET + i, texSize);
+        color += u_morphWeights[i] * displacement;
+    }
+#endif
+
+    return color;
+}
+
+#endif // !USE_MORPHING
\ No newline at end of file
diff --git a/src/viewer3d/assets/brdf.glsl b/src/viewer3d/assets/brdf.glsl
new file mode 100644
index 00000000..21aa85ef
--- /dev/null
+++ b/src/viewer3d/assets/brdf.glsl
@@ -0,0 +1,207 @@
+//
+// Fresnel
+//
+// http://graphicrants.blogspot.com/2013/08/specular-brdf-reference.html
+// https://github.com/wdas/brdf/tree/master/src/brdfs
+// https://google.github.io/filament/Filament.md.html
+//
+
+// The following equation models the Fresnel reflectance term of the spec equation (aka F())
+// Implementation of fresnel from [4], Equation 15
+vec3 F_Schlick(vec3 f0, vec3 f90, float VdotH)
+{
+    return f0 + (f90 - f0) * pow(clamp(1.0 - VdotH, 0.0, 1.0), 5.0);
+}
+
+float F_Schlick(float f0, float f90, float VdotH)
+{
+    float x = clamp(1.0 - VdotH, 0.0, 1.0);
+    float x2 = x * x;
+    float x5 = x * x2 * x2;
+    return f0 + (f90 - f0) * x5;
+}
+
+float F_Schlick(float f0, float VdotH)
+{
+    float f90 = 1.0; //clamp(50.0 * f0, 0.0, 1.0);
+    return F_Schlick(f0, f90, VdotH);
+}
+
+vec3 F_Schlick(vec3 f0, float f90, float VdotH)
+{
+    float x = clamp(1.0 - VdotH, 0.0, 1.0);
+    float x2 = x * x;
+    float x5 = x * x2 * x2;
+    return f0 + (f90 - f0) * x5;
+}
+
+vec3 F_Schlick(vec3 f0, float VdotH)
+{
+    float f90 = 1.0; //clamp(dot(f0, vec3(50.0 * 0.33)), 0.0, 1.0);
+    return F_Schlick(f0, f90, VdotH);
+}
+
+vec3 Schlick_to_F0(vec3 f, vec3 f90, float VdotH) {
+    float x = clamp(1.0 - VdotH, 0.0, 1.0);
+    float x2 = x * x;
+    float x5 = clamp(x * x2 * x2, 0.0, 0.9999);
+
+    return (f - f90 * x5) / (1.0 - x5);
+}
+
+float Schlick_to_F0(float f, float f90, float VdotH) {
+    float x = clamp(1.0 - VdotH, 0.0, 1.0);
+    float x2 = x * x;
+    float x5 = clamp(x * x2 * x2, 0.0, 0.9999);
+
+    return (f - f90 * x5) / (1.0 - x5);
+}
+
+vec3 Schlick_to_F0(vec3 f, float VdotH) {
+    return Schlick_to_F0(f, vec3(1.0), VdotH);
+}
+
+float Schlick_to_F0(float f, float VdotH) {
+    return Schlick_to_F0(f, 1.0, VdotH);
+}
+
+
+// Smith Joint GGX
+// Note: Vis = G / (4 * NdotL * NdotV)
+// see Eric Heitz. 2014. Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs. Journal of Computer Graphics Techniques, 3
+// see Real-Time Rendering. Page 331 to 336.
+// see https://google.github.io/filament/Filament.md.html#materialsystem/specularbrdf/geometricshadowing(specularg)
+float V_GGX(float NdotL, float NdotV, float alphaRoughness)
+{
+    float alphaRoughnessSq = alphaRoughness * alphaRoughness;
+
+    float GGXV = NdotL * sqrt(NdotV * NdotV * (1.0 - alphaRoughnessSq) + alphaRoughnessSq);
+    float GGXL = NdotV * sqrt(NdotL * NdotL * (1.0 - alphaRoughnessSq) + alphaRoughnessSq);
+
+    float GGX = GGXV + GGXL;
+    if (GGX > 0.0)
+    {
+        return 0.5 / GGX;
+    }
+    return 0.0;
+}
+
+
+// The following equation(s) model the distribution of microfacet normals across the area being drawn (aka D())
+// Implementation from "Average Irregularity Representation of a Roughened Surface for Ray Reflection" by T. S. Trowbridge, and K. P. Reitz
+// Follows the distribution function recommended in the SIGGRAPH 2013 course notes from EPIC Games [1], Equation 3.
+float D_GGX(float NdotH, float alphaRoughness)
+{
+    float alphaRoughnessSq = alphaRoughness * alphaRoughness;
+    float f = (NdotH * NdotH) * (alphaRoughnessSq - 1.0) + 1.0;
+    return alphaRoughnessSq / (M_PI * f * f);
+}
+
+
+float lambdaSheenNumericHelper(float x, float alphaG)
+{
+    float oneMinusAlphaSq = (1.0 - alphaG) * (1.0 - alphaG);
+    float a = mix(21.5473, 25.3245, oneMinusAlphaSq);
+    float b = mix(3.82987, 3.32435, oneMinusAlphaSq);
+    float c = mix(0.19823, 0.16801, oneMinusAlphaSq);
+    float d = mix(-1.97760, -1.27393, oneMinusAlphaSq);
+    float e = mix(-4.32054, -4.85967, oneMinusAlphaSq);
+    return a / (1.0 + b * pow(x, c)) + d * x + e;
+}
+
+
+float lambdaSheen(float cosTheta, float alphaG)
+{
+    if (abs(cosTheta) < 0.5)
+    {
+        return exp(lambdaSheenNumericHelper(cosTheta, alphaG));
+    }
+    else
+    {
+        return exp(2.0 * lambdaSheenNumericHelper(0.5, alphaG) - lambdaSheenNumericHelper(1.0 - cosTheta, alphaG));
+    }
+}
+
+
+float V_Sheen(float NdotL, float NdotV, float sheenRoughness)
+{
+    sheenRoughness = max(sheenRoughness, 0.000001); //clamp (0,1]
+    float alphaG = sheenRoughness * sheenRoughness;
+
+    return clamp(1.0 / ((1.0 + lambdaSheen(NdotV, alphaG) + lambdaSheen(NdotL, alphaG)) *
+        (4.0 * NdotV * NdotL)), 0.0, 1.0);
+}
+
+
+//Sheen implementation-------------------------------------------------------------------------------------
+// See  https://github.com/sebavan/glTF/tree/KHR_materials_sheen/extensions/2.0/Khronos/KHR_materials_sheen
+
+// Estevez and Kulla http://www.aconty.com/pdf/s2017_pbs_imageworks_sheen.pdf
+float D_Charlie(float sheenRoughness, float NdotH)
+{
+    sheenRoughness = max(sheenRoughness, 0.000001); //clamp (0,1]
+    float alphaG = sheenRoughness * sheenRoughness;
+    float invR = 1.0 / alphaG;
+    float cos2h = NdotH * NdotH;
+    float sin2h = 1.0 - cos2h;
+    return (2.0 + invR) * pow(sin2h, invR * 0.5) / (2.0 * M_PI);
+}
+
+
+//https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#acknowledgments AppendixB
+vec3 BRDF_lambertian(vec3 f0, vec3 f90, vec3 diffuseColor, float specularWeight, float VdotH)
+{
+    // see https://seblagarde.wordpress.com/2012/01/08/pi-or-not-to-pi-in-game-lighting-equation/
+    return (1.0 - specularWeight * F_Schlick(f0, f90, VdotH)) * (diffuseColor / M_PI);
+}
+
+
+#ifdef MATERIAL_IRIDESCENCE
+//https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#acknowledgments AppendixB
+vec3 BRDF_lambertianIridescence(vec3 f0, vec3 f90, vec3 iridescenceFresnel, float iridescenceFactor, vec3 diffuseColor, float specularWeight, float VdotH)
+{
+    // Use the maximum component of the iridescence Fresnel color
+    // Maximum is used instead of the RGB value to not get inverse colors for the diffuse BRDF
+    vec3 iridescenceFresnelMax = vec3(max(max(iridescenceFresnel.r, iridescenceFresnel.g), iridescenceFresnel.b));
+
+    vec3 schlickFresnel = F_Schlick(f0, f90, VdotH);
+
+    // Blend default specular Fresnel with iridescence Fresnel
+    vec3 F = mix(schlickFresnel, iridescenceFresnelMax, iridescenceFactor);
+
+    // see https://seblagarde.wordpress.com/2012/01/08/pi-or-not-to-pi-in-game-lighting-equation/
+    return (1.0 - specularWeight * F) * (diffuseColor / M_PI);
+}
+#endif
+
+
+//  https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#acknowledgments AppendixB
+vec3 BRDF_specularGGX(vec3 f0, vec3 f90, float alphaRoughness, float specularWeight, float VdotH, float NdotL, float NdotV, float NdotH)
+{
+    vec3 F = F_Schlick(f0, f90, VdotH);
+    float Vis = V_GGX(NdotL, NdotV, alphaRoughness);
+    float D = D_GGX(NdotH, alphaRoughness);
+
+    return specularWeight * F * Vis * D;
+}
+
+
+#ifdef MATERIAL_IRIDESCENCE
+vec3 BRDF_specularGGXIridescence(vec3 f0, vec3 f90, vec3 iridescenceFresnel, float alphaRoughness, float iridescenceFactor, float specularWeight, float VdotH, float NdotL, float NdotV, float NdotH)
+{
+    vec3 F = mix(F_Schlick(f0, f90, VdotH), iridescenceFresnel, iridescenceFactor);
+    float Vis = V_GGX(NdotL, NdotV, alphaRoughness);
+    float D = D_GGX(NdotH, alphaRoughness);
+
+    return specularWeight * F * Vis * D;
+}
+#endif
+
+
+// f_sheen
+vec3 BRDF_specularSheen(vec3 sheenColor, float sheenRoughness, float NdotL, float NdotV, float NdotH)
+{
+    float sheenDistribution = D_Charlie(sheenRoughness, NdotH);
+    float sheenVisibility = V_Sheen(NdotL, NdotV, sheenRoughness);
+    return sheenColor * sheenDistribution * sheenVisibility;
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/brick.jpg b/src/viewer3d/assets/brick.jpg
new file mode 100644
index 00000000..4889f518
Binary files /dev/null and b/src/viewer3d/assets/brick.jpg differ
diff --git a/src/viewer3d/assets/cube.gltf b/src/viewer3d/assets/cube.gltf
new file mode 100644
index 00000000..7bac5473
--- /dev/null
+++ b/src/viewer3d/assets/cube.gltf
@@ -0,0 +1,134 @@
+{
+    "asset" : {
+        "generator" : "Khronos glTF Blender I/O v3.3.32",
+        "version" : "2.0"
+    },
+    "scene" : 0,
+    "scenes" : [
+        {
+            "name" : "Scene",
+            "nodes" : [
+                0
+            ]
+        }
+    ],
+    "nodes" : [
+        {
+            "mesh" : 0,
+            "name" : "Cube"
+        }
+    ],
+    "materials" : [
+        {
+            "doubleSided" : true,
+            "name" : "Material",
+            "pbrMetallicRoughness" : {
+                "baseColorFactor" : [
+                    0.800000011920929,
+                    0.800000011920929,
+                    0.800000011920929,
+                    1
+                ],
+                "metallicFactor" : 0,
+                "roughnessFactor" : 0.5
+            }
+        }
+    ],
+    "meshes" : [
+        {
+            "name" : "Cube",
+            "primitives" : [
+                {
+                    "attributes" : {
+                        "POSITION" : 0,
+                        "NORMAL" : 1,
+                        "TANGENT" : 2,
+                        "TEXCOORD_0" : 3
+                    },
+                    "indices" : 4,
+                    "material" : 0
+                }
+            ]
+        }
+    ],
+    "accessors" : [
+        {
+            "bufferView" : 0,
+            "componentType" : 5126,
+            "count" : 24,
+            "max" : [
+                1,
+                1,
+                1
+            ],
+            "min" : [
+                -1,
+                -1,
+                -1
+            ],
+            "type" : "VEC3"
+        },
+        {
+            "bufferView" : 1,
+            "componentType" : 5126,
+            "count" : 24,
+            "type" : "VEC3"
+        },
+        {
+            "bufferView" : 2,
+            "componentType" : 5126,
+            "count" : 24,
+            "type" : "VEC4"
+        },
+        {
+            "bufferView" : 3,
+            "componentType" : 5126,
+            "count" : 24,
+            "type" : "VEC2"
+        },
+        {
+            "bufferView" : 4,
+            "componentType" : 5123,
+            "count" : 36,
+            "type" : "SCALAR"
+        }
+    ],
+    "bufferViews" : [
+        {
+            "buffer" : 0,
+            "byteLength" : 288,
+            "byteOffset" : 0,
+            "target" : 34962
+        },
+        {
+            "buffer" : 0,
+            "byteLength" : 288,
+            "byteOffset" : 288,
+            "target" : 34962
+        },
+        {
+            "buffer" : 0,
+            "byteLength" : 384,
+            "byteOffset" : 576,
+            "target" : 34962
+        },
+        {
+            "buffer" : 0,
+            "byteLength" : 192,
+            "byteOffset" : 960,
+            "target" : 34962
+        },
+        {
+            "buffer" : 0,
+            "byteLength" : 72,
+            "byteOffset" : 1152,
+            "target" : 34963
+        }
+    ],
+    "buffers" : [
+        {
+            "byteLength" : 1224,
+            "uri" : "data:application/octet-stream;base64,AACAPwAAgD8AAIC/AACAPwAAgD8AAIC/AACAPwAAgD8AAIC/AACAPwAAgL8AAIC/AACAPwAAgL8AAIC/AACAPwAAgL8AAIC/AACAPwAAgD8AAIA/AACAPwAAgD8AAIA/AACAPwAAgD8AAIA/AACAPwAAgL8AAIA/AACAPwAAgL8AAIA/AACAPwAAgL8AAIA/AACAvwAAgD8AAIC/AACAvwAAgD8AAIC/AACAvwAAgD8AAIC/AACAvwAAgL8AAIC/AACAvwAAgL8AAIC/AACAvwAAgL8AAIC/AACAvwAAgD8AAIA/AACAvwAAgD8AAIA/AACAvwAAgD8AAIA/AACAvwAAgL8AAIA/AACAvwAAgL8AAIA/AACAvwAAgL8AAIA/AAAAAAAAAAAAAIC/AAAAAAAAgD8AAACAAACAPwAAAAAAAACAAAAAAAAAgL8AAACAAAAAAAAAAAAAAIC/AACAPwAAAAAAAACAAAAAAAAAAAAAAIA/AAAAAAAAgD8AAACAAACAPwAAAAAAAACAAAAAAAAAgL8AAACAAAAAAAAAAAAAAIA/AACAPwAAAAAAAACAAACAvwAAAAAAAACAAAAAAAAAAAAAAIC/AAAAAAAAgD8AAACAAACAvwAAAAAAAACAAAAAAAAAgL8AAACAAAAAAAAAAAAAAIC/AACAvwAAAAAAAACAAAAAAAAAAAAAAIA/AAAAAAAAgD8AAACAAACAvwAAAAAAAACAAAAAAAAAgL8AAACAAAAAAAAAAAAAAIA/AACAPwAAAAAAAACAAACAvwAAgD8AAAAAAAAAgAAAgD8AAAAAAAAAAAAAgL8AAIA/AACAPwAAAAAAAACAAACAvwAAgD8AAAAAAAAAgAAAgL8AAAAAAAAAAAAAgL8AAIA/AACAPwAAAAAAAACAAACAPwAAgD8AAAAAAAAAgAAAgD8AAAAAAAAAAAAAgL8AAIA/AACAPwAAAAAAAACAAACAvwAAgD8AAAAAAAAAgAAAgD8AAAAAAAAAAAAAgL8AAIA/AAAAAAAAAAAAAIC/AACAvwAAgD8AAAAAAAAAgAAAgL8AAIA/AAAAAAAAAIAAAIA/AAAAAAAAAAAAAIC/AACAvwAAgD8AAAAAAAAAgAAAgL8AAIA/AAAAAAAAAIAAAIC/AAAAAAAAAAAAAIC/AACAvwAAgD8AAAAAAAAAgAAAgD8AAIA/AAAAAAAAAIAAAIA/AAAAAAAAAAAAAIC/AACAvwAAgD8AAAAAAAAAgAAAgL8AAIA/AAAAAAAAAIAAAIA/AACAPwAAAAAAAIA/AAAAAAAAgD8AAAAAAACAPwAAAAAAAIA/AACAPwAAgD8AAIA/AACAPwAAAAAAAIA/AACAPwAAAAAAAAAAAACAPwAAgD8AAIA/AACAPwAAAAAAAIA/AACAPwAAAAAAAAAAAAAAAAAAAAAAAAAAAACAPwAAgD8AAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAIA/AAAAAAAAgD8AAAAAAACAPwAAAAAAAIA/AQAOABQAAQAUAAcACgAGABMACgATABcAFQASAAwAFQAMAA8AEAADAAkAEAAJABYABQACAAgABQAIAAsAEQANAAAAEQAAAAQA"
+        }
+    ]
+}
diff --git a/src/viewer3d/assets/fullscreen.vert b/src/viewer3d/assets/fullscreen.vert
new file mode 100644
index 00000000..a6e21156
--- /dev/null
+++ b/src/viewer3d/assets/fullscreen.vert
@@ -0,0 +1,19 @@
+in vec3 a_pos;
+in vec2 a_texCoord;
+
+out vec2 v_texCoord;
+
+void main()
+{
+    //v_texCoord = a_texCoord*vec2(1,1);
+    // v_texCoord = (a_texCoord - vec2(0.5)) * vec2(2.0);
+    
+    // v_texCoord = a_texCoord * vec2(2.0);
+    // gl_Position = vec4(a_pos,1);
+
+    float x = float((gl_VertexID & 1) << 2);
+    float y = float((gl_VertexID & 2) << 1);
+    v_texCoord.x = x * 0.5;
+    v_texCoord.y = y * 0.5;
+    gl_Position = vec4(x - 1.0, y - 1.0, 0, 1);
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/functions.glsl b/src/viewer3d/assets/functions.glsl
new file mode 100644
index 00000000..02fd0229
--- /dev/null
+++ b/src/viewer3d/assets/functions.glsl
@@ -0,0 +1,86 @@
+const float M_PI = 3.141592653589793;
+
+
+in vec3 v_Position;
+
+
+#ifdef HAS_NORMAL_VEC3
+#ifdef HAS_TANGENT_VEC4
+in mat3 v_TBN;
+#else
+in vec3 v_Normal;
+#endif
+#endif
+
+
+#ifdef HAS_COLOR_0_VEC3
+in vec3 v_Color;
+#endif
+#ifdef HAS_COLOR_0_VEC4
+in vec4 v_Color;
+#endif
+
+
+vec4 getVertexColor()
+{
+   vec4 color = vec4(1.0);
+
+#ifdef HAS_COLOR_0_VEC3
+    color.rgb = v_Color.rgb;
+#endif
+#ifdef HAS_COLOR_0_VEC4
+    color = v_Color;
+#endif
+
+   return color;
+}
+
+
+struct NormalInfo {
+    vec3 ng;   // Geometry normal
+    vec3 t;    // Geometry tangent
+    vec3 b;    // Geometry bitangent
+    vec3 n;    // Shading normal
+    vec3 ntex; // Normal from texture, scaling is accounted for.
+};
+
+
+float clampedDot(vec3 x, vec3 y)
+{
+    return clamp(dot(x, y), 0.0, 1.0);
+}
+
+
+float max3(vec3 v)
+{
+    return max(max(v.x, v.y), v.z);
+}
+
+
+float sq(float t)
+{
+    return t * t;
+}
+
+vec2 sq(vec2 t)
+{
+    return t * t;
+}
+
+vec3 sq(vec3 t)
+{
+    return t * t;
+}
+
+vec4 sq(vec4 t)
+{
+    return t * t;
+}
+
+
+float applyIorToRoughness(float roughness, float ior)
+{
+    // Scale roughness with IOR so that an IOR of 1.0 results in no microfacet refraction and
+    // an IOR of 1.5 results in the default amount of microfacet refraction.
+    return roughness * clamp(ior * 2.0 - 2.0, 0.0, 1.0);
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/ibl.glsl b/src/viewer3d/assets/ibl.glsl
new file mode 100644
index 00000000..25bae222
--- /dev/null
+++ b/src/viewer3d/assets/ibl.glsl
@@ -0,0 +1,179 @@
+uniform float u_EnvIntensity;
+
+vec3 getDiffuseLight(vec3 n)
+{
+    return texture(u_LambertianEnvSampler, u_EnvRotation * n).rgb * u_EnvIntensity;
+}
+
+
+vec4 getSpecularSample(vec3 reflection, float lod)
+{
+    return textureLod(u_GGXEnvSampler, u_EnvRotation * reflection, lod) * u_EnvIntensity;
+}
+
+
+vec4 getSheenSample(vec3 reflection, float lod)
+{
+    return textureLod(u_CharlieEnvSampler, u_EnvRotation * reflection, lod) * u_EnvIntensity;
+}
+
+
+vec3 getIBLRadianceGGX(vec3 n, vec3 v, float roughness, vec3 F0, float specularWeight)
+{
+    float NdotV = clampedDot(n, v);
+    float lod = roughness * float(u_MipCount - 1);
+    vec3 reflection = normalize(reflect(-v, n));
+
+    vec2 brdfSamplePoint = clamp(vec2(NdotV, roughness), vec2(0.0, 0.0), vec2(1.0, 1.0));
+    vec2 f_ab = texture(u_GGXLUT, brdfSamplePoint).rg;
+    vec4 specularSample = getSpecularSample(reflection, lod);
+
+    vec3 specularLight = specularSample.rgb;
+
+    // see https://bruop.github.io/ibl/#single_scattering_results at Single Scattering Results
+    // Roughness dependent fresnel, from Fdez-Aguera
+    vec3 Fr = max(vec3(1.0 - roughness), F0) - F0;
+    vec3 k_S = F0 + Fr * pow(1.0 - NdotV, 5.0);
+    vec3 FssEss = k_S * f_ab.x + f_ab.y;
+
+    return specularWeight * specularLight * FssEss;
+}
+
+
+#ifdef MATERIAL_IRIDESCENCE
+vec3 getIBLRadianceGGXIridescence(vec3 n, vec3 v, float roughness, vec3 F0, vec3 iridescenceFresnel, float iridescenceFactor, float specularWeight)
+{
+    float NdotV = clampedDot(n, v);
+    float lod = roughness * float(u_MipCount - 1);
+    vec3 reflection = normalize(reflect(-v, n));
+
+    vec2 brdfSamplePoint = clamp(vec2(NdotV, roughness), vec2(0.0, 0.0), vec2(1.0, 1.0));
+    vec2 f_ab = texture(u_GGXLUT, brdfSamplePoint).rg;
+    vec4 specularSample = getSpecularSample(reflection, lod);
+
+    vec3 specularLight = specularSample.rgb;
+
+    // see https://bruop.github.io/ibl/#single_scattering_results at Single Scattering Results
+    // Roughness dependent fresnel, from Fdez-Aguera
+    vec3 Fr = max(vec3(1.0 - roughness), F0) - F0;
+    vec3 k_S = mix(F0 + Fr * pow(1.0 - NdotV, 5.0), iridescenceFresnel, iridescenceFactor);
+    vec3 FssEss = k_S * f_ab.x + f_ab.y;
+
+    return specularWeight * specularLight * FssEss;
+}
+#endif
+
+
+#ifdef MATERIAL_TRANSMISSION
+vec3 getTransmissionSample(vec2 fragCoord, float roughness, float ior)
+{
+    float framebufferLod = log2(float(u_TransmissionFramebufferSize.x)) * applyIorToRoughness(roughness, ior);
+    vec3 transmittedLight = textureLod(u_TransmissionFramebufferSampler, fragCoord.xy, framebufferLod).rgb;
+    return transmittedLight;
+}
+#endif
+
+
+#ifdef MATERIAL_TRANSMISSION
+vec3 getIBLVolumeRefraction(vec3 n, vec3 v, float perceptualRoughness, vec3 baseColor, vec3 f0, vec3 f90,
+    vec3 position, mat4 modelMatrix, mat4 viewMatrix, mat4 projMatrix, float ior, float thickness, vec3 attenuationColor, float attenuationDistance)
+{
+    vec3 transmissionRay = getVolumeTransmissionRay(n, v, thickness, ior, modelMatrix);
+    vec3 refractedRayExit = position + transmissionRay;
+
+    // Project refracted vector on the framebuffer, while mapping to normalized device coordinates.
+    vec4 ndcPos = projMatrix * viewMatrix * vec4(refractedRayExit, 1.0);
+    vec2 refractionCoords = ndcPos.xy / ndcPos.w;
+    refractionCoords += 1.0;
+    refractionCoords /= 2.0;
+
+    // Sample framebuffer to get pixel the refracted ray hits.
+    vec3 transmittedLight = getTransmissionSample(refractionCoords, perceptualRoughness, ior);
+
+    vec3 attenuatedColor = applyVolumeAttenuation(transmittedLight, length(transmissionRay), attenuationColor, attenuationDistance);
+
+    // Sample GGX LUT to get the specular component.
+    float NdotV = clampedDot(n, v);
+    vec2 brdfSamplePoint = clamp(vec2(NdotV, perceptualRoughness), vec2(0.0, 0.0), vec2(1.0, 1.0));
+    vec2 brdf = texture(u_GGXLUT, brdfSamplePoint).rg;
+    vec3 specularColor = f0 * brdf.x + f90 * brdf.y;
+
+    return (1.0 - specularColor) * attenuatedColor * baseColor;
+}
+#endif
+
+
+// specularWeight is introduced with KHR_materials_specular
+vec3 getIBLRadianceLambertian(vec3 n, vec3 v, float roughness, vec3 diffuseColor, vec3 F0, float specularWeight)
+{
+    float NdotV = clampedDot(n, v);
+    vec2 brdfSamplePoint = clamp(vec2(NdotV, roughness), vec2(0.0, 0.0), vec2(1.0, 1.0));
+    vec2 f_ab = texture(u_GGXLUT, brdfSamplePoint).rg;
+
+    vec3 irradiance = getDiffuseLight(n);
+
+    // see https://bruop.github.io/ibl/#single_scattering_results at Single Scattering Results
+    // Roughness dependent fresnel, from Fdez-Aguera
+
+    vec3 Fr = max(vec3(1.0 - roughness), F0) - F0;
+    vec3 k_S = F0 + Fr * pow(1.0 - NdotV, 5.0);
+    vec3 FssEss = specularWeight * k_S * f_ab.x + f_ab.y; // <--- GGX / specular light contribution (scale it down if the specularWeight is low)
+
+    // Multiple scattering, from Fdez-Aguera
+    float Ems = (1.0 - (f_ab.x + f_ab.y));
+    vec3 F_avg = specularWeight * (F0 + (1.0 - F0) / 21.0);
+    vec3 FmsEms = Ems * FssEss * F_avg / (1.0 - F_avg * Ems);
+    vec3 k_D = diffuseColor * (1.0 - FssEss + FmsEms); // we use +FmsEms as indicated by the formula in the blog post (might be a typo in the implementation)
+
+    return (FmsEms + k_D) * irradiance;
+}
+
+
+#ifdef MATERIAL_IRIDESCENCE
+// specularWeight is introduced with KHR_materials_specular
+vec3 getIBLRadianceLambertianIridescence(vec3 n, vec3 v, float roughness, vec3 diffuseColor, vec3 F0, vec3 iridescenceF0, float iridescenceFactor, float specularWeight)
+{
+    float NdotV = clampedDot(n, v);
+    vec2 brdfSamplePoint = clamp(vec2(NdotV, roughness), vec2(0.0, 0.0), vec2(1.0, 1.0));
+    vec2 f_ab = texture(u_GGXLUT, brdfSamplePoint).rg;
+
+    vec3 irradiance = getDiffuseLight(n);
+
+    // Use the maximum component of the iridescence Fresnel color
+    // Maximum is used instead of the RGB value to not get inverse colors for the diffuse BRDF
+    vec3 iridescenceF0Max = vec3(max(max(iridescenceF0.r, iridescenceF0.g), iridescenceF0.b));
+
+    // Blend between base F0 and iridescence F0
+    vec3 mixedF0 = mix(F0, iridescenceF0Max, iridescenceFactor);
+
+    // see https://bruop.github.io/ibl/#single_scattering_results at Single Scattering Results
+    // Roughness dependent fresnel, from Fdez-Aguera
+
+    vec3 Fr = max(vec3(1.0 - roughness), mixedF0) - mixedF0;
+    vec3 k_S = mixedF0 + Fr * pow(1.0 - NdotV, 5.0);
+    vec3 FssEss = specularWeight * k_S * f_ab.x + f_ab.y; // <--- GGX / specular light contribution (scale it down if the specularWeight is low)
+
+    // Multiple scattering, from Fdez-Aguera
+    float Ems = (1.0 - (f_ab.x + f_ab.y));
+    vec3 F_avg = specularWeight * (mixedF0 + (1.0 - mixedF0) / 21.0);
+    vec3 FmsEms = Ems * FssEss * F_avg / (1.0 - F_avg * Ems);
+    vec3 k_D = diffuseColor * (1.0 - FssEss + FmsEms); // we use +FmsEms as indicated by the formula in the blog post (might be a typo in the implementation)
+
+    return (FmsEms + k_D) * irradiance;
+}
+#endif
+
+
+vec3 getIBLRadianceCharlie(vec3 n, vec3 v, float sheenRoughness, vec3 sheenColor)
+{
+    float NdotV = clampedDot(n, v);
+    float lod = sheenRoughness * float(u_MipCount - 1);
+    vec3 reflection = normalize(reflect(-v, n));
+
+    vec2 brdfSamplePoint = clamp(vec2(NdotV, sheenRoughness), vec2(0.0, 0.0), vec2(1.0, 1.0));
+    float brdf = texture(u_CharlieLUT, brdfSamplePoint).b;
+    vec4 sheenSample = getSheenSample(reflection, lod);
+
+    vec3 sheenLight = sheenSample.rgb;
+    return sheenLight * sheenColor * brdf;
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/ibl_filtering.frag b/src/viewer3d/assets/ibl_filtering.frag
new file mode 100644
index 00000000..fad7a9df
--- /dev/null
+++ b/src/viewer3d/assets/ibl_filtering.frag
@@ -0,0 +1,438 @@
+// #version 450
+// #extension GL_ARB_separate_shader_objects : enable
+
+// precision mediump float;
+#define MATH_PI 3.1415926535897932384626433832795
+// #define MATH_INV_PI (1.0 / MATH_PI)
+
+uniform samplerCube uCubeMap;
+
+// enum
+const int cLambertian = 0;
+const int cGGX = 1;
+const int cCharlie = 2;
+
+// layout(push_constant) uniform FilterParameters {
+uniform float u_roughness;
+uniform int u_sampleCount;
+uniform int u_width;
+uniform float u_lodBias;
+uniform int u_distribution; // enum
+uniform int u_currentFace;
+uniform int u_isGeneratingLUT;
+
+// layout (location = 0) in vec2 inUV;
+in vec2 v_texCoord;
+
+out vec4 fragmentColor;
+
+// layout(location = 6) out vec3 outLUT;
+
+vec3 uvToXYZ(int face, vec2 uv)
+{
+    if (face == 0)
+        return vec3(1.f, uv.y, -uv.x);
+
+    else if (face == 1)
+        return vec3(-1.f, uv.y, uv.x);
+
+    else if (face == 2)
+        return vec3(+uv.x, -1.f, +uv.y);
+
+    else if (face == 3)
+        return vec3(+uv.x, 1.f, -uv.y);
+
+    else if (face == 4)
+        return vec3(+uv.x, uv.y, 1.f);
+
+    else { // if(face == 5)
+        return vec3(-uv.x, +uv.y, -1.f);
+    }
+}
+
+vec2 dirToUV(vec3 dir)
+{
+    return vec2(0.5f + 0.5f * atan(dir.z, dir.x) / MATH_PI,
+                1.f - acos(dir.y) / MATH_PI);
+}
+
+float saturate(float v) { return clamp(v, 0.0f, 1.0f); }
+
+// Hammersley Points on the Hemisphere
+// CC BY 3.0 (Holger Dammertz)
+// http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html
+// with adapted interface
+float radicalInverse_VdC(uint bits)
+{
+    bits = (bits << 16u) | (bits >> 16u);
+    bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
+    bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
+    bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
+    bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
+    return float(bits) * 2.3283064365386963e-10; // / 0x100000000
+}
+
+// hammersley2d describes a sequence of points in the 2d unit square [0,1)^2
+// that can be used for quasi Monte Carlo integration
+vec2 hammersley2d(int i, int N)
+{
+    return vec2(float(i) / float(N), radicalInverse_VdC(uint(i)));
+}
+
+// Hemisphere Sample
+
+// TBN generates a tangent bitangent normal coordinate frame from the normal
+// (the normal must be normalized)
+mat3 generateTBN(vec3 normal)
+{
+    vec3 bitangent = vec3(0.0, 1.0, 0.0);
+
+    float NdotUp = dot(normal, vec3(0.0, 1.0, 0.0));
+    float epsilon = 0.0000001;
+    if (1.0 - abs(NdotUp) <= epsilon) {
+        // Sampling +Y or -Y, so we need a more robust bitangent.
+        if (NdotUp > 0.0) {
+            bitangent = vec3(0.0, 0.0, 1.0);
+        }
+        else {
+            bitangent = vec3(0.0, 0.0, -1.0);
+        }
+    }
+
+    vec3 tangent = normalize(cross(bitangent, normal));
+    bitangent = cross(normal, tangent);
+
+    return mat3(tangent, bitangent, normal);
+}
+
+struct MicrofacetDistributionSample {
+    float pdf;
+    float cosTheta;
+    float sinTheta;
+    float phi;
+};
+
+float D_GGX(float NdotH, float roughness)
+{
+    float a = NdotH * roughness;
+    float k = roughness / (1.0 - NdotH * NdotH + a * a);
+    return k * k * (1.0 / MATH_PI);
+}
+
+// GGX microfacet distribution
+// https://www.cs.cornell.edu/~srm/publications/EGSR07-btdf.html
+// This implementation is based on https://bruop.github.io/ibl/,
+//  https://www.tobias-franke.eu/log/2014/03/30/notes_on_importance_sampling.html
+// and https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch20.html
+MicrofacetDistributionSample GGX(vec2 xi, float roughness)
+{
+    MicrofacetDistributionSample ggx;
+
+    // evaluate sampling equations
+    float alpha = roughness * roughness;
+    ggx.cosTheta =
+        saturate(sqrt((1.0 - xi.y) / (1.0 + (alpha * alpha - 1.0) * xi.y)));
+    ggx.sinTheta = sqrt(1.0 - ggx.cosTheta * ggx.cosTheta);
+    ggx.phi = 2.0 * MATH_PI * xi.x;
+
+    // evaluate GGX pdf (for half vector)
+    ggx.pdf = D_GGX(ggx.cosTheta, alpha);
+
+    // Apply the Jacobian to obtain a pdf that is parameterized by l
+    // see https://bruop.github.io/ibl/
+    // Typically you'd have the following:
+    // float pdf = D_GGX(NoH, roughness) * NoH / (4.0 * VoH);
+    // but since V = N => VoH == NoH
+    ggx.pdf /= 4.0;
+
+    return ggx;
+}
+
+// NDF
+float D_Ashikhmin(float NdotH, float roughness)
+{
+    float alpha = roughness * roughness;
+    // Ashikhmin 2007, "Distribution-based BRDFs"
+    float a2 = alpha * alpha;
+    float cos2h = NdotH * NdotH;
+    float sin2h = 1.0 - cos2h;
+    float sin4h = sin2h * sin2h;
+    float cot2 = -cos2h / (a2 * sin2h);
+    return 1.0 / (MATH_PI * (4.0 * a2 + 1.0) * sin4h) *
+           (4.0 * exp(cot2) + sin4h);
+}
+
+// NDF
+float D_Charlie(float sheenRoughness, float NdotH)
+{
+    sheenRoughness = max(sheenRoughness, 0.000001); // clamp (0,1]
+    float invR = 1.0 / sheenRoughness;
+    float cos2h = NdotH * NdotH;
+    float sin2h = 1.0 - cos2h;
+    return (2.0 + invR) * pow(sin2h, invR * 0.5) / (2.0 * MATH_PI);
+}
+
+MicrofacetDistributionSample Charlie(vec2 xi, float roughness)
+{
+    MicrofacetDistributionSample charlie;
+
+    float alpha = roughness * roughness;
+    charlie.sinTheta = pow(xi.y, alpha / (2.0 * alpha + 1.0));
+    charlie.cosTheta = sqrt(1.0 - charlie.sinTheta * charlie.sinTheta);
+    charlie.phi = 2.0 * MATH_PI * xi.x;
+
+    // evaluate Charlie pdf (for half vector)
+    charlie.pdf = D_Charlie(alpha, charlie.cosTheta);
+
+    // Apply the Jacobian to obtain a pdf that is parameterized by l
+    charlie.pdf /= 4.0;
+
+    return charlie;
+}
+
+MicrofacetDistributionSample Lambertian(vec2 xi, float roughness)
+{
+    MicrofacetDistributionSample lambertian;
+
+    // Cosine weighted hemisphere sampling
+    // http://www.pbr-book.org/3ed-2018/Monte_Carlo_Integration/2D_Sampling_with_Multidimensional_Transformations.html#Cosine-WeightedHemisphereSampling
+    lambertian.cosTheta = sqrt(1.0 - xi.y);
+    lambertian.sinTheta =
+        sqrt(xi.y); // equivalent to `sqrt(1.0 - cosTheta*cosTheta)`;
+    lambertian.phi = 2.0 * MATH_PI * xi.x;
+
+    lambertian.pdf =
+        lambertian.cosTheta /
+        MATH_PI; // evaluation for solid angle, therefore drop the sinTheta
+
+    return lambertian;
+}
+
+// getImportanceSample returns an importance sample direction with pdf in the .w
+// component
+vec4 getImportanceSample(int sampleIndex, vec3 N, float roughness)
+{
+    // generate a quasi monte carlo point in the unit square [0.1)^2
+    vec2 xi = hammersley2d(sampleIndex, u_sampleCount);
+
+    MicrofacetDistributionSample importanceSample;
+
+    // generate the points on the hemisphere with a fitting mapping for
+    // the distribution (e.g. lambertian uses a cosine importance)
+    if (u_distribution == cLambertian) {
+        importanceSample = Lambertian(xi, roughness);
+    }
+    else if (u_distribution == cGGX) {
+        // Trowbridge-Reitz / GGX microfacet model (Walter et al)
+        // https://www.cs.cornell.edu/~srm/publications/EGSR07-btdf.html
+        importanceSample = GGX(xi, roughness);
+    }
+    else if (u_distribution == cCharlie) {
+        importanceSample = Charlie(xi, roughness);
+    }
+
+    // transform the hemisphere sample to the normal coordinate frame
+    // i.e. rotate the hemisphere to the normal direction
+    vec3 localSpaceDirection =
+        normalize(vec3(importanceSample.sinTheta * cos(importanceSample.phi),
+                       importanceSample.sinTheta * sin(importanceSample.phi),
+                       importanceSample.cosTheta));
+    mat3 TBN = generateTBN(N);
+    vec3 direction = TBN * localSpaceDirection;
+
+    return vec4(direction, importanceSample.pdf);
+}
+
+// Mipmap Filtered Samples (GPU Gems 3, 20.4)
+// https://developer.nvidia.com/gpugems/gpugems3/part-iii-rendering/chapter-20-gpu-based-importance-sampling
+// https://cgg.mff.cuni.cz/~jaroslav/papers/2007-sketch-fis/Final_sap_0073.pdf
+float computeLod(float pdf)
+{
+    // // Solid angle of current sample -- bigger for less likely samples
+    // float omegaS = 1.0 / (float(u_sampleCount) * pdf);
+    // // Solid angle of texel
+    // // note: the factor of 4.0 * MATH_PI
+    // float omegaP = 4.0 * MATH_PI / (6.0 * float(u_width) * float(u_width));
+    // // Mip level is determined by the ratio of our sample's solid angle to a
+    // texel's solid angle
+    // // note that 0.5 * log2 is equivalent to log4
+    // float lod = 0.5 * log2(omegaS / omegaP);
+
+    // babylon introduces a factor of K (=4) to the solid angle ratio
+    // this helps to avoid undersampling the environment map
+    // this does not appear in the original formulation by Jaroslav Krivanek and
+    // Mark Colbert log4(4) == 1 lod += 1.0;
+
+    // We achieved good results by using the original formulation from Krivanek
+    // & Colbert adapted to cubemaps
+
+    // https://cgg.mff.cuni.cz/~jaroslav/papers/2007-sketch-fis/Final_sap_0073.pdf
+    float lod = 0.5 * log2(6.0 * float(u_width) * float(u_width) /
+                           (float(u_sampleCount) * pdf));
+
+    return lod;
+}
+
+vec3 filterColor(vec3 N)
+{
+    // return  textureLod(uCubeMap, N, 3.0).rgb;
+    vec3 color = vec3(0.f);
+    float weight = 0.0f;
+
+    for (int i = 0; i < u_sampleCount; ++i) {
+        vec4 importanceSample = getImportanceSample(i, N, u_roughness);
+
+        vec3 H = vec3(importanceSample.xyz);
+        float pdf = importanceSample.w;
+
+        // mipmap filtered samples (GPU Gems 3, 20.4)
+        float lod = computeLod(pdf);
+
+        // apply the bias to the lod
+        lod += u_lodBias;
+
+        if (u_distribution == cLambertian) {
+            // sample lambertian at a lower resolution to avoid fireflies
+            vec3 lambertian = textureLod(uCubeMap, H, lod).rgb;
+
+            //// the below operations cancel each other out
+            // lambertian *= NdotH; // lamberts law
+            // lambertian /= pdf; // invert bias from importance sampling
+            // lambertian /= MATH_PI; // convert irradiance to radiance
+            // https://seblagarde.wordpress.com/2012/01/08/pi-or-not-to-pi-in-game-lighting-equation/
+
+            color += lambertian;
+        }
+        else if (u_distribution == cGGX || u_distribution == cCharlie) {
+            // Note: reflect takes incident vector.
+            vec3 V = N;
+            vec3 L = normalize(reflect(-V, H));
+            float NdotL = dot(N, L);
+
+            if (NdotL > 0.0) {
+                if (u_roughness == 0.0) {
+                    // without this the roughness=0 lod is too high
+                    lod = u_lodBias;
+                }
+                vec3 sampleColor = textureLod(uCubeMap, L, lod).rgb;
+                color += sampleColor * NdotL;
+                weight += NdotL;
+            }
+        }
+    }
+
+    if (weight != 0.0f) {
+        color /= weight;
+    }
+    else {
+        color /= float(u_sampleCount);
+    }
+
+    return color.rgb;
+}
+
+// From the filament docs. Geometric Shadowing function
+// https://google.github.io/filament/Filament.html#toc4.4.2
+float V_SmithGGXCorrelated(float NoV, float NoL, float roughness)
+{
+    float a2 = pow(roughness, 4.0);
+    float GGXV = NoL * sqrt(NoV * NoV * (1.0 - a2) + a2);
+    float GGXL = NoV * sqrt(NoL * NoL * (1.0 - a2) + a2);
+    return 0.5 / (GGXV + GGXL);
+}
+
+// https://github.com/google/filament/blob/master/shaders/src/brdf.fs#L136
+float V_Ashikhmin(float NdotL, float NdotV)
+{
+    return clamp(1.0 / (4.0 * (NdotL + NdotV - NdotL * NdotV)), 0.0, 1.0);
+}
+
+// Compute LUT for GGX distribution.
+// See
+// https://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes_v2.pdf
+vec3 LUT(float NdotV, float roughness)
+{
+    // Compute spherical view vector: (sin(phi), 0, cos(phi))
+    vec3 V = vec3(sqrt(1.0 - NdotV * NdotV), 0.0, NdotV);
+
+    // The macro surface normal just points up.
+    vec3 N = vec3(0.0, 0.0, 1.0);
+
+    // To make the LUT independant from the material's F0, which is part of the
+    // Fresnel term when substituted by Schlick's approximation, we factor it
+    // out of the integral, yielding to the form: F0 * I1 + I2 I1 and I2 are
+    // slighlty different in the Fresnel term, but both only depend on NoL and
+    // roughness, so they are both numerically integrated and written into two
+    // channels.
+    float A = 0.0;
+    float B = 0.0;
+    float C = 0.0;
+
+    for (int i = 0; i < u_sampleCount; ++i) {
+        // Importance sampling, depending on the distribution.
+        vec4 importanceSample = getImportanceSample(i, N, roughness);
+        vec3 H = importanceSample.xyz;
+        // float pdf = importanceSample.w;
+        vec3 L = normalize(reflect(-V, H));
+
+        float NdotL = saturate(L.z);
+        float NdotH = saturate(H.z);
+        float VdotH = saturate(dot(V, H));
+        if (NdotL > 0.0) {
+            if (u_distribution == cGGX) {
+                // LUT for GGX distribution.
+
+                // Taken from: https://bruop.github.io/ibl
+                // Shadertoy: https://www.shadertoy.com/view/3lXXDB
+                // Terms besides V are from the GGX PDF we're dividing by.
+                float V_pdf = V_SmithGGXCorrelated(NdotV, NdotL, roughness) *
+                              VdotH * NdotL / NdotH;
+                float Fc = pow(1.0 - VdotH, 5.0);
+                A += (1.0 - Fc) * V_pdf;
+                B += Fc * V_pdf;
+                C += 0.0;
+            }
+
+            if (u_distribution == cCharlie) {
+                // LUT for Charlie distribution.
+                float sheenDistribution = D_Charlie(roughness, NdotH);
+                float sheenVisibility = V_Ashikhmin(NdotL, NdotV);
+
+                A += 0.0;
+                B += 0.0;
+                C += sheenVisibility * sheenDistribution * NdotL * VdotH;
+            }
+        }
+    }
+
+    // The PDF is simply pdf(v, h) -> NDF * <nh>.
+    // To parametrize the PDF over l, use the Jacobian transform, yielding to:
+    // pdf(v, l) -> NDF * <nh> / 4<vh> Since the BRDF divide through the PDF to
+    // be normalized, the 4 can be pulled out of the integral.
+    return vec3(4.0 * A, 4.0 * B, 4.0 * 2.0 * MATH_PI * C) /
+           float(u_sampleCount);
+}
+
+// entry point
+void main()
+{
+    vec3 color = vec3(0);
+
+    if (u_isGeneratingLUT == 0) {
+        vec2 newUV = v_texCoord;
+
+        newUV = newUV * 2.0 - 1.0;
+
+        vec3 scan = uvToXYZ(u_currentFace, newUV);
+
+        vec3 direction = normalize(scan);
+        direction.y = -direction.y;
+
+        color = filterColor(direction);
+    }
+    else {
+        color = LUT(v_texCoord.x, v_texCoord.y);
+    }
+
+    fragmentColor = vec4(color, 1.0);
+}
diff --git a/src/viewer3d/assets/iridiscence.glsl b/src/viewer3d/assets/iridiscence.glsl
new file mode 100644
index 00000000..4f2ddd89
--- /dev/null
+++ b/src/viewer3d/assets/iridiscence.glsl
@@ -0,0 +1,100 @@
+// XYZ to sRGB color space
+const mat3 XYZ_TO_REC709 = mat3(
+     3.2404542, -0.9692660,  0.0556434,
+    -1.5371385,  1.8760108, -0.2040259,
+    -0.4985314,  0.0415560,  1.0572252
+);
+
+// Assume air interface for top
+// Note: We don't handle the case fresnel0 == 1
+vec3 Fresnel0ToIor(vec3 fresnel0) {
+    vec3 sqrtF0 = sqrt(fresnel0);
+    return (vec3(1.0) + sqrtF0) / (vec3(1.0) - sqrtF0);
+}
+
+// Conversion FO/IOR
+vec3 IorToFresnel0(vec3 transmittedIor, float incidentIor) {
+    return sq((transmittedIor - vec3(incidentIor)) / (transmittedIor + vec3(incidentIor)));
+}
+
+// ior is a value between 1.0 and 3.0. 1.0 is air interface
+float IorToFresnel0(float transmittedIor, float incidentIor) {
+    return sq((transmittedIor - incidentIor) / (transmittedIor + incidentIor));
+}
+
+// Fresnel equations for dielectric/dielectric interfaces.
+// Ref: https://belcour.github.io/blog/research/2017/05/01/brdf-thin-film.html
+// Evaluation XYZ sensitivity curves in Fourier space
+vec3 evalSensitivity(float OPD, vec3 shift) {
+    float phase = 2.0 * M_PI * OPD * 1.0e-9;
+    vec3 val = vec3(5.4856e-13, 4.4201e-13, 5.2481e-13);
+    vec3 pos = vec3(1.6810e+06, 1.7953e+06, 2.2084e+06);
+    vec3 var = vec3(4.3278e+09, 9.3046e+09, 6.6121e+09);
+
+    vec3 xyz = val * sqrt(2.0 * M_PI * var) * cos(pos * phase + shift) * exp(-sq(phase) * var);
+    xyz.x += 9.7470e-14 * sqrt(2.0 * M_PI * 4.5282e+09) * cos(2.2399e+06 * phase + shift[0]) * exp(-4.5282e+09 * sq(phase));
+    xyz /= 1.0685e-7;
+
+    vec3 srgb = XYZ_TO_REC709 * xyz;
+    return srgb;
+}
+
+vec3 evalIridescence(float outsideIOR, float eta2, float cosTheta1, float thinFilmThickness, vec3 baseF0) {
+    vec3 I;
+
+    // Force iridescenceIor -> outsideIOR when thinFilmThickness -> 0.0
+    float iridescenceIor = mix(outsideIOR, eta2, smoothstep(0.0, 0.03, thinFilmThickness));
+    // Evaluate the cosTheta on the base layer (Snell law)
+    float sinTheta2Sq = sq(outsideIOR / iridescenceIor) * (1.0 - sq(cosTheta1));
+
+    // Handle TIR:
+    float cosTheta2Sq = 1.0 - sinTheta2Sq;
+    if (cosTheta2Sq < 0.0) {
+        return vec3(1.0);
+    }
+
+    float cosTheta2 = sqrt(cosTheta2Sq);
+
+    // First interface
+    float R0 = IorToFresnel0(iridescenceIor, outsideIOR);
+    float R12 = F_Schlick(R0, cosTheta1);
+    float R21 = R12;
+    float T121 = 1.0 - R12;
+    float phi12 = 0.0;
+    if (iridescenceIor < outsideIOR) phi12 = M_PI;
+    float phi21 = M_PI - phi12;
+
+    // Second interface
+    vec3 baseIOR = Fresnel0ToIor(clamp(baseF0, 0.0, 0.9999)); // guard against 1.0
+    vec3 R1 = IorToFresnel0(baseIOR, iridescenceIor);
+    vec3 R23 = F_Schlick(R1, cosTheta2);
+    vec3 phi23 = vec3(0.0);
+    if (baseIOR[0] < iridescenceIor) phi23[0] = M_PI;
+    if (baseIOR[1] < iridescenceIor) phi23[1] = M_PI;
+    if (baseIOR[2] < iridescenceIor) phi23[2] = M_PI;
+
+    // Phase shift
+    float OPD = 2.0 * iridescenceIor * thinFilmThickness * cosTheta2;
+    vec3 phi = vec3(phi21) + phi23;
+
+    // Compound terms
+    vec3 R123 = clamp(R12 * R23, 1e-5, 0.9999);
+    vec3 r123 = sqrt(R123);
+    vec3 Rs = sq(T121) * R23 / (vec3(1.0) - R123);
+
+    // Reflectance term for m = 0 (DC term amplitude)
+    vec3 C0 = R12 + Rs;
+    I = C0;
+
+    // Reflectance term for m > 0 (pairs of diracs)
+    vec3 Cm = Rs - T121;
+    for (int m = 1; m <= 2; ++m)
+    {
+        Cm *= r123;
+        vec3 Sm = 2.0 * evalSensitivity(float(m) * OPD, float(m) * phi);
+        I += Cm * Sm;
+    }
+
+    // Since out of gamut colors might be produced, negative color values are clamped to 0.
+    return max(I, vec3(0.0));
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/material_info.glsl b/src/viewer3d/assets/material_info.glsl
new file mode 100644
index 00000000..60689f02
--- /dev/null
+++ b/src/viewer3d/assets/material_info.glsl
@@ -0,0 +1,376 @@
+// Metallic Roughness
+uniform float u_MetallicFactor;
+uniform float u_RoughnessFactor;
+uniform vec4 u_BaseColorFactor;
+
+// Specular Glossiness
+uniform vec3 u_SpecularFactor;
+uniform vec4 u_DiffuseFactor;
+uniform float u_GlossinessFactor;
+
+// Sheen
+uniform float u_SheenRoughnessFactor;
+uniform vec3 u_SheenColorFactor;
+
+// Clearcoat
+uniform float u_ClearcoatFactor;
+uniform float u_ClearcoatRoughnessFactor;
+
+// Specular
+uniform vec3 u_KHR_materials_specular_specularColorFactor;
+uniform float u_KHR_materials_specular_specularFactor;
+
+// Transmission
+uniform float u_TransmissionFactor;
+
+// Volume
+uniform float u_ThicknessFactor;
+uniform vec3 u_AttenuationColor;
+uniform float u_AttenuationDistance;
+
+// Iridescence
+uniform float u_IridescenceFactor;
+uniform float u_IridescenceIor;
+uniform float u_IridescenceThicknessMinimum;
+uniform float u_IridescenceThicknessMaximum;
+
+// Emissive Strength
+uniform float u_EmissiveStrength;
+
+// PBR Next IOR
+uniform float u_Ior;
+
+// Alpha mode
+uniform float u_AlphaCutoff;
+
+uniform vec3 u_Camera;
+
+#ifdef MATERIAL_TRANSMISSION
+uniform ivec2 u_ScreenSize;
+#endif
+
+uniform mat4 u_ModelMatrix;
+uniform mat4 u_ViewMatrix;
+uniform mat4 u_ProjectionMatrix;
+
+
+struct MaterialInfo
+{
+    float ior;
+    float perceptualRoughness;      // roughness value, as authored by the model creator (input to shader)
+    vec3 f0;                        // full reflectance color (n incidence angle)
+
+    float alphaRoughness;           // roughness mapped to a more linear change in the roughness (proposed by [2])
+    vec3 c_diff;
+
+    vec3 f90;                       // reflectance color at grazing angle
+    float metallic;
+
+    vec3 baseColor;
+
+    float sheenRoughnessFactor;
+    vec3 sheenColorFactor;
+
+    vec3 clearcoatF0;
+    vec3 clearcoatF90;
+    float clearcoatFactor;
+    vec3 clearcoatNormal;
+    float clearcoatRoughness;
+
+    // KHR_materials_specular 
+    float specularWeight; // product of specularFactor and specularTexture.a
+
+    float transmissionFactor;
+
+    float thickness;
+    vec3 attenuationColor;
+    float attenuationDistance;
+
+    // KHR_materials_iridescence
+    float iridescenceFactor;
+    float iridescenceIor;
+    float iridescenceThickness;
+};
+
+
+// Get normal, tangent and bitangent vectors.
+NormalInfo getNormalInfo(vec3 v)
+{
+    vec2 UV = getNormalUV();
+    vec3 uv_dx = dFdx(vec3(UV, 0.0));
+    vec3 uv_dy = dFdy(vec3(UV, 0.0));
+
+    if (length(uv_dx) + length(uv_dy) <= 1e-6) {
+        uv_dx = vec3(1.0, 0.0, 0.0);
+        uv_dy = vec3(0.0, 1.0, 0.0);
+    }
+
+    vec3 t_ = (uv_dy.t * dFdx(v_Position) - uv_dx.t * dFdy(v_Position)) /
+        (uv_dx.s * uv_dy.t - uv_dy.s * uv_dx.t);
+
+    vec3 n, t, b, ng;
+
+    // Compute geometrical TBN:
+#ifdef HAS_NORMAL_VEC3
+#ifdef HAS_TANGENT_VEC4
+    // Trivial TBN computation, present as vertex attribute.
+    // Normalize eigenvectors as matrix is linearly interpolated.
+    t = normalize(v_TBN[0]);
+    b = normalize(v_TBN[1]);
+    ng = normalize(v_TBN[2]);
+#else
+    // Normals are either present as vertex attributes or approximated.
+    ng = normalize(v_Normal);
+    t = normalize(t_ - ng * dot(ng, t_));
+    b = cross(ng, t);
+#endif
+#else
+    ng = normalize(cross(dFdx(v_Position), dFdy(v_Position)));
+    t = normalize(t_ - ng * dot(ng, t_));
+    b = cross(ng, t);
+#endif
+
+
+    // For a back-facing surface, the tangential basis vectors are negated.
+    if (gl_FrontFacing == false)
+    {
+        t *= -1.0;
+        b *= -1.0;
+        ng *= -1.0;
+    }
+
+    // Compute normals:
+    NormalInfo info;
+    info.ng = ng;
+#ifdef HAS_NORMAL_MAP
+    info.ntex = texture(u_NormalSampler, UV).rgb * 2.0 - vec3(1.0);
+    info.ntex *= vec3(u_NormalScale, u_NormalScale, 1.0);
+    info.ntex = normalize(info.ntex);
+    info.n = normalize(mat3(t, b, ng) * info.ntex);
+#else
+    info.n = ng;
+#endif
+    info.t = t;
+    info.b = b;
+    return info;
+}
+
+
+#ifdef MATERIAL_CLEARCOAT
+vec3 getClearcoatNormal(NormalInfo normalInfo)
+{
+#ifdef HAS_CLEARCOAT_NORMAL_MAP
+    vec3 n = texture(u_ClearcoatNormalSampler, getClearcoatNormalUV()).rgb * 2.0 - vec3(1.0);
+    n *= vec3(u_ClearcoatNormalScale, u_ClearcoatNormalScale, 1.0);
+    n = mat3(normalInfo.t, normalInfo.b, normalInfo.ng) * normalize(n);
+    return n;
+#else
+    return normalInfo.ng;
+#endif
+}
+#endif
+
+
+vec4 getBaseColor()
+{
+    vec4 baseColor = vec4(1);
+
+#if defined(MATERIAL_SPECULARGLOSSINESS)
+    baseColor = u_DiffuseFactor;
+#elif defined(MATERIAL_METALLICROUGHNESS)
+    baseColor = u_BaseColorFactor;
+#endif
+
+#if defined(MATERIAL_SPECULARGLOSSINESS) && defined(HAS_DIFFUSE_MAP)
+    baseColor *= texture(u_DiffuseSampler, getDiffuseUV());
+#elif defined(MATERIAL_METALLICROUGHNESS) && defined(HAS_BASE_COLOR_MAP)
+    baseColor *= texture(u_BaseColorSampler, getBaseColorUV());
+#endif
+
+    return baseColor * getVertexColor();
+}
+
+
+#ifdef MATERIAL_SPECULARGLOSSINESS
+MaterialInfo getSpecularGlossinessInfo(MaterialInfo info)
+{
+    info.f0 = u_SpecularFactor;
+    info.perceptualRoughness = u_GlossinessFactor;
+
+#ifdef HAS_SPECULAR_GLOSSINESS_MAP
+    vec4 sgSample = texture(u_SpecularGlossinessSampler, getSpecularGlossinessUV());
+    info.perceptualRoughness *= sgSample.a ; // glossiness to roughness
+    info.f0 *= sgSample.rgb; // specular
+#endif // ! HAS_SPECULAR_GLOSSINESS_MAP
+
+    info.perceptualRoughness = 1.0 - info.perceptualRoughness; // 1 - glossiness
+    info.c_diff = info.baseColor.rgb * (1.0 - max(max(info.f0.r, info.f0.g), info.f0.b));
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_METALLICROUGHNESS
+MaterialInfo getMetallicRoughnessInfo(MaterialInfo info)
+{
+    info.metallic = u_MetallicFactor;
+    info.perceptualRoughness = u_RoughnessFactor;
+
+#ifdef HAS_METALLIC_ROUGHNESS_MAP
+    // Roughness is stored in the 'g' channel, metallic is stored in the 'b' channel.
+    // This layout intentionally reserves the 'r' channel for (optional) occlusion map data
+    vec4 mrSample = texture(u_MetallicRoughnessSampler, getMetallicRoughnessUV());
+    info.perceptualRoughness *= mrSample.g;
+    info.metallic *= mrSample.b;
+#endif
+
+// split maps into separate textures (use same UV for them for now)
+#ifdef HAS_ROUGHNESS_MAP
+    vec4 rSample = texture(u_RoughnessSampler, getRoughnessUV());
+    info.perceptualRoughness *= rSample.r;
+#endif
+
+#ifdef HAS_METALNESS_MAP
+    vec4 mSample = texture(u_MetalnessSampler, getMetalnessUV());
+    info.metallic *= mSample.r;
+#endif
+
+    // Achromatic f0 based on IOR.
+    info.c_diff = mix(info.baseColor.rgb,  vec3(0), info.metallic);
+    info.f0 = mix(info.f0, info.baseColor.rgb, info.metallic);
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_SHEEN
+MaterialInfo getSheenInfo(MaterialInfo info)
+{
+    info.sheenColorFactor = u_SheenColorFactor;
+    info.sheenRoughnessFactor = u_SheenRoughnessFactor;
+
+#ifdef HAS_SHEEN_COLOR_MAP
+    vec4 sheenColorSample = texture(u_SheenColorSampler, getSheenColorUV());
+    info.sheenColorFactor *= sheenColorSample.rgb;
+#endif
+
+#ifdef HAS_SHEEN_ROUGHNESS_MAP
+    vec4 sheenRoughnessSample = texture(u_SheenRoughnessSampler, getSheenRoughnessUV());
+    info.sheenRoughnessFactor *= sheenRoughnessSample.a;
+#endif
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_SPECULAR
+MaterialInfo getSpecularInfo(MaterialInfo info)
+{   
+    vec4 specularTexture = vec4(1.0);
+#ifdef HAS_SPECULAR_MAP
+    specularTexture.a = texture(u_SpecularSampler, getSpecularUV()).a;
+#endif
+#ifdef HAS_SPECULAR_COLOR_MAP
+    specularTexture.rgb = texture(u_SpecularColorSampler, getSpecularColorUV()).rgb;
+#endif
+
+    vec3 dielectricSpecularF0 = min(info.f0 * u_KHR_materials_specular_specularColorFactor * specularTexture.rgb, vec3(1.0));
+    info.f0 = mix(dielectricSpecularF0, info.baseColor.rgb, info.metallic);
+    info.specularWeight = u_KHR_materials_specular_specularFactor * specularTexture.a;
+    info.c_diff = mix(info.baseColor.rgb, vec3(0), info.metallic);
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_TRANSMISSION
+MaterialInfo getTransmissionInfo(MaterialInfo info)
+{
+    info.transmissionFactor = u_TransmissionFactor;
+
+#ifdef HAS_TRANSMISSION_MAP
+    vec4 transmissionSample = texture(u_TransmissionSampler, getTransmissionUV());
+    info.transmissionFactor *= transmissionSample.r;
+#endif
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_VOLUME
+MaterialInfo getVolumeInfo(MaterialInfo info)
+{
+    info.thickness = u_ThicknessFactor;
+    info.attenuationColor = u_AttenuationColor;
+    info.attenuationDistance = u_AttenuationDistance;
+
+#ifdef HAS_THICKNESS_MAP
+    vec4 thicknessSample = texture(u_ThicknessSampler, getThicknessUV());
+    info.thickness *= thicknessSample.g;
+#endif
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_IRIDESCENCE
+MaterialInfo getIridescenceInfo(MaterialInfo info)
+{
+    info.iridescenceFactor = u_IridescenceFactor;
+    info.iridescenceIor = u_IridescenceIor;
+    info.iridescenceThickness = u_IridescenceThicknessMaximum;
+
+    #ifdef HAS_IRIDESCENCE_MAP
+        info.iridescenceFactor *= texture(u_IridescenceSampler, getIridescenceUV()).r;
+    #endif
+
+    #ifdef HAS_IRIDESCENCE_THICKNESS_MAP
+        float thicknessSampled = texture(u_IridescenceThicknessSampler, getIridescenceThicknessUV()).g;
+        float thickness = mix(u_IridescenceThicknessMinimum, u_IridescenceThicknessMaximum, thicknessSampled);
+        info.iridescenceThickness = thickness;
+    #endif
+
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_CLEARCOAT
+MaterialInfo getClearCoatInfo(MaterialInfo info, NormalInfo normalInfo)
+{
+    info.clearcoatFactor = u_ClearcoatFactor;
+    info.clearcoatRoughness = u_ClearcoatRoughnessFactor;
+    info.clearcoatF0 = vec3(pow((info.ior - 1.0) / (info.ior + 1.0), 2.0));
+    info.clearcoatF90 = vec3(1.0);
+
+#ifdef HAS_CLEARCOAT_MAP
+    vec4 clearcoatSample = texture(u_ClearcoatSampler, getClearcoatUV());
+    info.clearcoatFactor *= clearcoatSample.r;
+#endif
+
+#ifdef HAS_CLEARCOAT_ROUGHNESS_MAP
+    vec4 clearcoatSampleRoughness = texture(u_ClearcoatRoughnessSampler, getClearcoatRoughnessUV());
+    info.clearcoatRoughness *= clearcoatSampleRoughness.g;
+#endif
+
+    info.clearcoatNormal = getClearcoatNormal(normalInfo);
+    info.clearcoatRoughness = clamp(info.clearcoatRoughness, 0.0, 1.0);
+    return info;
+}
+#endif
+
+
+#ifdef MATERIAL_IOR
+MaterialInfo getIorInfo(MaterialInfo info)
+{
+    info.f0 = vec3(pow(( u_Ior - 1.0) /  (u_Ior + 1.0), 2.0));
+    info.ior = u_Ior;
+    return info;
+}
+#endif
+
+
+float albedoSheenScalingLUT(float NdotV, float sheenRoughnessFactor)
+{
+    return texture(u_SheenELUT, vec2(NdotV, sheenRoughnessFactor)).r;
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/panorama.hdr b/src/viewer3d/assets/panorama.hdr
new file mode 100644
index 00000000..d005ad69
Binary files /dev/null and b/src/viewer3d/assets/panorama.hdr differ
diff --git a/src/viewer3d/assets/panorama_to_cubemap.frag b/src/viewer3d/assets/panorama_to_cubemap.frag
new file mode 100644
index 00000000..1518c6e7
--- /dev/null
+++ b/src/viewer3d/assets/panorama_to_cubemap.frag
@@ -0,0 +1,56 @@
+#define MATH_PI 3.1415926535897932384626433832795
+#define MATH_INV_PI (1.0 / MATH_PI)
+
+in vec2 v_texCoord;
+out vec4 fragmentColor;
+
+uniform int u_currentFace;
+
+// uniform sampler2D u_inputTexture;
+uniform sampler2D u_panorama;
+
+vec3 uvToXYZ(int face, vec2 uv)
+{
+    if (face == 0)
+        return vec3(1.f, uv.y, -uv.x);
+
+    else if (face == 1)
+        return vec3(-1.f, uv.y, uv.x);
+
+    else if (face == 2)
+        return vec3(+uv.x, -1.f, +uv.y);
+
+    else if (face == 3)
+        return vec3(+uv.x, 1.f, -uv.y);
+
+    else if (face == 4)
+        return vec3(+uv.x, uv.y, 1.f);
+
+    else // if(face == 5)
+    {
+        return vec3(-uv.x, +uv.y, -1.f);
+    }
+}
+
+vec2 dirToUV(vec3 dir)
+{
+    return vec2(0.5f + 0.5f * atan(dir.z, dir.x) / MATH_PI,
+                1.f - acos(dir.y) / MATH_PI);
+}
+
+vec3 panoramaToCubeMap(int face, vec2 texCoord)
+{
+    vec2 texCoordNew = texCoord * 2.0 - 1.0;
+    vec3 scan = uvToXYZ(face, texCoordNew);
+    vec3 direction = normalize(scan);
+    vec2 src = dirToUV(direction);
+
+    return texture(u_panorama, src).rgb;
+}
+
+void main(void)
+{
+    fragmentColor = vec4(0.0, 0.0, 0.0, 1.0);
+
+    fragmentColor.rgb = panoramaToCubeMap(u_currentFace, v_texCoord);
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/pbr.frag b/src/viewer3d/assets/pbr.frag
new file mode 100644
index 00000000..7ec967e8
--- /dev/null
+++ b/src/viewer3d/assets/pbr.frag
@@ -0,0 +1,434 @@
+//
+// This fragment shader defines a reference implementation for Physically Based Shading of
+// a microfacet surface material defined by a glTF model.
+//
+// References:
+// [1] Real Shading in Unreal Engine 4
+//     http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes_v2.pdf
+// [2] Physically Based Shading at Disney
+//     http://blog.selfshadow.com/publications/s2012-shading-course/burley/s2012_pbs_disney_brdf_notes_v3.pdf
+// [3] README.md - Environment Maps
+//     https://github.com/KhronosGroup/glTF-WebGL-PBR/#environment-maps
+// [4] "An Inexpensive BRDF Model for Physically based Rendering" by Christophe Schlick
+//     https://www.cs.virginia.edu/~jdl/bib/appearance/analytic%20models/schlick94b.pdf
+// [5] "KHR_materials_clearcoat"
+//     https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
+
+//precision highp float;
+
+
+#include <tonemapping.glsl>
+#include <textures.glsl>
+#include <functions.glsl>
+#include <brdf.glsl>
+#include <punctual.glsl>
+#include <ibl.glsl>
+#include <material_info.glsl>
+
+#ifdef MATERIAL_IRIDESCENCE
+#include <iridescence.glsl>
+#endif
+
+
+out vec4 g_finalColor;
+
+void main()
+{
+    vec4 baseColor = getBaseColor();
+
+#if ALPHAMODE == ALPHAMODE_OPAQUE
+    baseColor.a = 1.0;
+#endif
+
+    vec3 v = normalize(u_Camera - v_Position);
+    NormalInfo normalInfo = getNormalInfo(v);
+    vec3 n = normalInfo.n;
+    vec3 t = normalInfo.t;
+    vec3 b = normalInfo.b;
+
+    float NdotV = clampedDot(n, v);
+    float TdotV = clampedDot(t, v);
+    float BdotV = clampedDot(b, v);
+
+    MaterialInfo materialInfo;
+    materialInfo.baseColor = baseColor.rgb;
+    
+    // The default index of refraction of 1.5 yields a dielectric normal incidence reflectance of 0.04.
+    materialInfo.ior = 1.5;
+    materialInfo.f0 = vec3(0.04);
+    materialInfo.specularWeight = 1.0;
+
+    // If the MR debug output is selected, we have to enforce evaluation of the non-iridescence BRDF functions.
+#if DEBUG == DEBUG_METALLIC_ROUGHNESS
+#undef MATERIAL_IRIDESCENCE
+#endif
+
+#ifdef MATERIAL_IOR
+    materialInfo = getIorInfo(materialInfo);
+#endif
+
+#ifdef MATERIAL_SPECULARGLOSSINESS
+    materialInfo = getSpecularGlossinessInfo(materialInfo);
+#endif
+
+#ifdef MATERIAL_METALLICROUGHNESS
+    materialInfo = getMetallicRoughnessInfo(materialInfo);
+#endif
+
+#ifdef MATERIAL_SHEEN
+    materialInfo = getSheenInfo(materialInfo);
+#endif
+
+#ifdef MATERIAL_CLEARCOAT
+    materialInfo = getClearCoatInfo(materialInfo, normalInfo);
+#endif
+
+#ifdef MATERIAL_SPECULAR
+    materialInfo = getSpecularInfo(materialInfo);
+#endif
+
+#ifdef MATERIAL_TRANSMISSION
+    materialInfo = getTransmissionInfo(materialInfo);
+#endif
+
+#ifdef MATERIAL_VOLUME
+    materialInfo = getVolumeInfo(materialInfo);
+#endif
+
+#ifdef MATERIAL_IRIDESCENCE
+    materialInfo = getIridescenceInfo(materialInfo);
+#endif
+
+    materialInfo.perceptualRoughness = clamp(materialInfo.perceptualRoughness, 0.0, 1.0);
+    materialInfo.metallic = clamp(materialInfo.metallic, 0.0, 1.0);
+
+    // Roughness is authored as perceptual roughness; as is convention,
+    // convert to material roughness by squaring the perceptual roughness.
+    materialInfo.alphaRoughness = materialInfo.perceptualRoughness * materialInfo.perceptualRoughness;
+
+    // Compute reflectance.
+    float reflectance = max(max(materialInfo.f0.r, materialInfo.f0.g), materialInfo.f0.b);
+
+    // Anything less than 2% is physically impossible and is instead considered to be shadowing. Compare to "Real-Time-Rendering" 4th editon on page 325.
+    materialInfo.f90 = vec3(1.0);
+
+    // LIGHTING
+    vec3 f_specular = vec3(0.0);
+    vec3 f_diffuse = vec3(0.0);
+    vec3 f_emissive = vec3(0.0);
+    vec3 f_clearcoat = vec3(0.0);
+    vec3 f_sheen = vec3(0.0);
+    vec3 f_transmission = vec3(0.0);
+
+    float albedoSheenScaling = 1.0;
+
+#ifdef MATERIAL_IRIDESCENCE
+    vec3 iridescenceFresnel = materialInfo.f0;
+    vec3 iridescenceF0 = materialInfo.f0;
+
+    if (materialInfo.iridescenceThickness == 0.0) {
+        materialInfo.iridescenceFactor = 0.0;
+    }
+
+    if (materialInfo.iridescenceFactor > 0.0) {
+        iridescenceFresnel = evalIridescence(1.0, materialInfo.iridescenceIor, NdotV, materialInfo.iridescenceThickness, materialInfo.f0);
+        iridescenceF0 = Schlick_to_F0(iridescenceFresnel, NdotV);
+    }
+#endif
+
+    // Calculate lighting contribution from image based lighting source (IBL)
+#ifdef USE_IBL
+#ifdef MATERIAL_IRIDESCENCE
+    f_specular += getIBLRadianceGGXIridescence(n, v, materialInfo.perceptualRoughness, materialInfo.f0, iridescenceFresnel, materialInfo.iridescenceFactor, materialInfo.specularWeight);
+    f_diffuse += getIBLRadianceLambertianIridescence(n, v, materialInfo.perceptualRoughness, materialInfo.c_diff, materialInfo.f0, iridescenceF0, materialInfo.iridescenceFactor, materialInfo.specularWeight);
+#else
+    f_specular += getIBLRadianceGGX(n, v, materialInfo.perceptualRoughness, materialInfo.f0, materialInfo.specularWeight);
+    f_diffuse += getIBLRadianceLambertian(n, v, materialInfo.perceptualRoughness, materialInfo.c_diff, materialInfo.f0, materialInfo.specularWeight);
+#endif
+
+#ifdef MATERIAL_CLEARCOAT
+    f_clearcoat += getIBLRadianceGGX(materialInfo.clearcoatNormal, v, materialInfo.clearcoatRoughness, materialInfo.clearcoatF0, 1.0);
+#endif
+
+#ifdef MATERIAL_SHEEN
+    f_sheen += getIBLRadianceCharlie(n, v, materialInfo.sheenRoughnessFactor, materialInfo.sheenColorFactor);
+#endif
+#endif
+
+#if defined(MATERIAL_TRANSMISSION) && defined(USE_IBL)
+    f_transmission += getIBLVolumeRefraction(
+        n, v,
+        materialInfo.perceptualRoughness,
+        materialInfo.c_diff, materialInfo.f0, materialInfo.f90,
+        v_Position, u_ModelMatrix, u_ViewMatrix, u_ProjectionMatrix,
+        materialInfo.ior, materialInfo.thickness, materialInfo.attenuationColor, materialInfo.attenuationDistance);
+#endif
+
+    float ao = 1.0;
+    // Apply optional PBR terms for additional (optional) shading
+#ifdef HAS_OCCLUSION_MAP
+    ao = texture(u_OcclusionSampler,  getOcclusionUV()).r;
+    f_diffuse = mix(f_diffuse, f_diffuse * ao, u_OcclusionStrength);
+    // apply ambient occlusion to all lighting that is not punctual
+    f_specular = mix(f_specular, f_specular * ao, u_OcclusionStrength);
+    f_sheen = mix(f_sheen, f_sheen * ao, u_OcclusionStrength);
+    f_clearcoat = mix(f_clearcoat, f_clearcoat * ao, u_OcclusionStrength);
+#endif
+
+#ifdef USE_PUNCTUAL
+    for (int i = 0; i < LIGHT_COUNT; ++i)
+    {
+        Light light = u_Lights[i];
+
+        vec3 pointToLight;
+        if (light.type != LightType_Directional)
+        {
+            pointToLight = light.position - v_Position;
+        }
+        else
+        {
+            pointToLight = -light.direction;
+        }
+
+        // BSTF
+        vec3 l = normalize(pointToLight);   // Direction from surface point to light
+        vec3 h = normalize(l + v);          // Direction of the vector between l and v, called halfway vector
+        float NdotL = clampedDot(n, l);
+        float NdotV = clampedDot(n, v);
+        float NdotH = clampedDot(n, h);
+        float LdotH = clampedDot(l, h);
+        float VdotH = clampedDot(v, h);
+        if (NdotL > 0.0 || NdotV > 0.0)
+        {
+            // Calculation of analytical light
+            // https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#acknowledgments AppendixB
+            vec3 intensity = getLighIntensity(light, pointToLight);
+#ifdef MATERIAL_IRIDESCENCE
+            f_diffuse += intensity * NdotL *  BRDF_lambertianIridescence(materialInfo.f0, materialInfo.f90, iridescenceFresnel, materialInfo.iridescenceFactor, materialInfo.c_diff, materialInfo.specularWeight, VdotH);
+            f_specular += intensity * NdotL * BRDF_specularGGXIridescence(materialInfo.f0, materialInfo.f90, iridescenceFresnel, materialInfo.alphaRoughness, materialInfo.iridescenceFactor, materialInfo.specularWeight, VdotH, NdotL, NdotV, NdotH);
+#else
+            f_diffuse += intensity * NdotL *  BRDF_lambertian(materialInfo.f0, materialInfo.f90, materialInfo.c_diff, materialInfo.specularWeight, VdotH);
+            f_specular += intensity * NdotL * BRDF_specularGGX(materialInfo.f0, materialInfo.f90, materialInfo.alphaRoughness, materialInfo.specularWeight, VdotH, NdotL, NdotV, NdotH);
+#endif
+
+#ifdef MATERIAL_SHEEN
+            f_sheen += intensity * getPunctualRadianceSheen(materialInfo.sheenColorFactor, materialInfo.sheenRoughnessFactor, NdotL, NdotV, NdotH);
+            albedoSheenScaling = min(1.0 - max3(materialInfo.sheenColorFactor) * albedoSheenScalingLUT(NdotV, materialInfo.sheenRoughnessFactor),
+                1.0 - max3(materialInfo.sheenColorFactor) * albedoSheenScalingLUT(NdotL, materialInfo.sheenRoughnessFactor));
+#endif
+
+#ifdef MATERIAL_CLEARCOAT
+            f_clearcoat += intensity * getPunctualRadianceClearCoat(materialInfo.clearcoatNormal, v, l, h, VdotH,
+                materialInfo.clearcoatF0, materialInfo.clearcoatF90, materialInfo.clearcoatRoughness);
+#endif
+        }
+
+        // BDTF
+#ifdef MATERIAL_TRANSMISSION
+        // If the light ray travels through the geometry, use the point it exits the geometry again.
+        // That will change the angle to the light source, if the material refracts the light ray.
+        vec3 transmissionRay = getVolumeTransmissionRay(n, v, materialInfo.thickness, materialInfo.ior, u_ModelMatrix);
+        pointToLight -= transmissionRay;
+        l = normalize(pointToLight);
+
+        vec3 intensity = getLighIntensity(light, pointToLight);
+        vec3 transmittedLight = intensity * getPunctualRadianceTransmission(n, v, l, materialInfo.alphaRoughness, materialInfo.f0, materialInfo.f90, materialInfo.c_diff, materialInfo.ior);
+
+#ifdef MATERIAL_VOLUME
+        transmittedLight = applyVolumeAttenuation(transmittedLight, length(transmissionRay), materialInfo.attenuationColor, materialInfo.attenuationDistance);
+#endif
+
+        f_transmission += transmittedLight;
+#endif
+    }
+#endif
+
+    f_emissive = u_EmissiveFactor;
+#ifdef MATERIAL_EMISSIVE_STRENGTH
+    f_emissive *= u_EmissiveStrength;
+#endif
+#ifdef HAS_EMISSIVE_MAP
+    f_emissive *= texture(u_EmissiveSampler, getEmissiveUV()).rgb;
+#endif
+
+    // Layer blending
+
+    float clearcoatFactor = 0.0;
+    vec3 clearcoatFresnel = vec3(0);
+
+#ifdef MATERIAL_CLEARCOAT
+    clearcoatFactor = materialInfo.clearcoatFactor;
+    clearcoatFresnel = F_Schlick(materialInfo.clearcoatF0, materialInfo.clearcoatF90, clampedDot(materialInfo.clearcoatNormal, v));
+    f_clearcoat = f_clearcoat * clearcoatFactor;
+#endif
+
+#ifdef MATERIAL_TRANSMISSION
+    vec3 diffuse = mix(f_diffuse, f_transmission, materialInfo.transmissionFactor);
+#else
+    vec3 diffuse = f_diffuse;
+#endif
+
+    vec3 color = vec3(0);
+#ifdef MATERIAL_UNLIT
+    color = baseColor.rgb;
+#else
+    color = f_emissive + diffuse + f_specular;
+    color = f_sheen + color * albedoSheenScaling;
+    color = color * (1.0 - clearcoatFactor * clearcoatFresnel) + f_clearcoat;
+#endif
+
+#if DEBUG == DEBUG_NONE
+
+#if ALPHAMODE == ALPHAMODE_MASK
+    // Late discard to avoid samplig artifacts. See https://github.com/KhronosGroup/glTF-Sample-Viewer/issues/267
+    if (baseColor.a < u_AlphaCutoff)
+    {
+        discard;
+    }
+    baseColor.a = 1.0;
+#endif
+
+#ifdef LINEAR_OUTPUT
+    g_finalColor = vec4(color.rgb, baseColor.a);
+#else
+    g_finalColor = vec4(toneMap(color), baseColor.a);
+#endif
+
+#else
+    // In case of missing data for a debug view, render a checkerboard.
+    g_finalColor = vec4(1.0);
+    {
+        float frequency = 0.02;
+        float gray = 0.9;
+
+        vec2 v1 = step(0.5, fract(frequency * gl_FragCoord.xy));
+        vec2 v2 = step(0.5, vec2(1.0) - fract(frequency * gl_FragCoord.xy));
+        g_finalColor.rgb *= gray + v1.x * v1.y + v2.x * v2.y;
+    }
+#endif
+
+    // Debug views:
+
+    // Generic:
+#if DEBUG == DEBUG_UV_0 && defined(HAS_TEXCOORD_0_VEC2)
+    g_finalColor.rgb = vec3(v_texcoord_0, 0);
+#endif
+#if DEBUG == DEBUG_UV_1 && defined(HAS_TEXCOORD_1_VEC2)
+    g_finalColor.rgb = vec3(v_texcoord_1, 0);
+#endif
+#if DEBUG == DEBUG_NORMAL_TEXTURE && defined(HAS_NORMAL_MAP)
+    g_finalColor.rgb = (normalInfo.ntex + 1.0) / 2.0;
+#endif
+#if DEBUG == DEBUG_NORMAL_SHADING
+    g_finalColor.rgb = (n + 1.0) / 2.0;
+#endif
+#if DEBUG == DEBUG_NORMAL_GEOMETRY
+    g_finalColor.rgb = (normalInfo.ng + 1.0) / 2.0;
+#endif
+#if DEBUG == DEBUG_TANGENT
+    g_finalColor.rgb = (normalInfo.t + 1.0) / 2.0;
+#endif
+#if DEBUG == DEBUG_BITANGENT
+    g_finalColor.rgb = (normalInfo.b + 1.0) / 2.0;
+#endif
+#if DEBUG == DEBUG_ALPHA
+    g_finalColor.rgb = vec3(baseColor.a);
+#endif
+#if DEBUG == DEBUG_OCCLUSION && defined(HAS_OCCLUSION_MAP)
+    g_finalColor.rgb = vec3(ao);
+#endif
+#if DEBUG == DEBUG_EMISSIVE
+    g_finalColor.rgb = linearTosRGB(f_emissive);
+#endif
+
+    // MR:
+#ifdef MATERIAL_METALLICROUGHNESS
+#if DEBUG == DEBUG_METALLIC_ROUGHNESS
+    g_finalColor.rgb = linearTosRGB(f_diffuse + f_specular);
+#endif
+#if DEBUG == DEBUG_METALLIC
+    g_finalColor.rgb = vec3(materialInfo.metallic);
+#endif
+#if DEBUG == DEBUG_ROUGHNESS
+    g_finalColor.rgb = vec3(materialInfo.perceptualRoughness);
+#endif
+#if DEBUG == DEBUG_BASE_COLOR
+    g_finalColor.rgb = linearTosRGB(materialInfo.baseColor);
+#endif
+#endif
+
+    // Clearcoat:
+#ifdef MATERIAL_CLEARCOAT
+#if DEBUG == DEBUG_CLEARCOAT
+    g_finalColor.rgb = linearTosRGB(f_clearcoat);
+#endif
+#if DEBUG == DEBUG_CLEARCOAT_FACTOR
+    g_finalColor.rgb = vec3(materialInfo.clearcoatFactor);
+#endif
+#if DEBUG == DEBUG_CLEARCOAT_ROUGHNESS
+    g_finalColor.rgb = vec3(materialInfo.clearcoatRoughness);
+#endif
+#if DEBUG == DEBUG_CLEARCOAT_NORMAL
+    g_finalColor.rgb = (materialInfo.clearcoatNormal + vec3(1)) / 2.0;
+#endif
+#endif
+
+    // Sheen:
+#ifdef MATERIAL_SHEEN
+#if DEBUG == DEBUG_SHEEN
+    g_finalColor.rgb = linearTosRGB(f_sheen);
+#endif
+#if DEBUG == DEBUG_SHEEN_COLOR
+    g_finalColor.rgb = materialInfo.sheenColorFactor;
+#endif
+#if DEBUG == DEBUG_SHEEN_ROUGHNESS
+    g_finalColor.rgb = vec3(materialInfo.sheenRoughnessFactor);
+#endif
+#endif
+
+    // Specular:
+#ifdef MATERIAL_SPECULAR
+#if DEBUG == DEBUG_SPECULAR
+    g_finalColor.rgb = linearTosRGB(f_specular);
+#endif
+#if DEBUG == DEBUG_SPECULAR_FACTOR
+    g_finalColor.rgb = vec3(materialInfo.specularWeight);
+#endif
+
+#if DEBUG == DEBUG_SPECULAR_COLOR
+vec3 specularTexture = vec3(1.0);
+#ifdef HAS_SPECULAR_COLOR_MAP
+    specularTexture.rgb = texture(u_SpecularColorSampler, getSpecularColorUV()).rgb;
+#endif
+    g_finalColor.rgb = u_KHR_materials_specular_specularColorFactor * specularTexture.rgb;
+#endif
+#endif
+
+    // Transmission, Volume:
+#ifdef MATERIAL_TRANSMISSION
+#if DEBUG == DEBUG_TRANSMISSION_VOLUME
+    g_finalColor.rgb = linearTosRGB(f_transmission);
+#endif
+#if DEBUG == DEBUG_TRANSMISSION_FACTOR
+    g_finalColor.rgb = vec3(materialInfo.transmissionFactor);
+#endif
+#endif
+#ifdef MATERIAL_VOLUME
+#if DEBUG == DEBUG_VOLUME_THICKNESS
+    g_finalColor.rgb = vec3(materialInfo.thickness);
+#endif
+#endif
+
+    // Iridescence:
+#ifdef MATERIAL_IRIDESCENCE
+#if DEBUG == DEBUG_IRIDESCENCE
+    g_finalColor.rgb = iridescenceFresnel;
+#endif
+#if DEBUG == DEBUG_IRIDESCENCE_FACTOR
+    g_finalColor.rgb = vec3(materialInfo.iridescenceFactor);
+#endif
+#if DEBUG == DEBUG_IRIDESCENCE_THICKNESS
+    g_finalColor.rgb = vec3(materialInfo.iridescenceThickness / 1200.0);
+#endif
+#endif
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/primitive.vert b/src/viewer3d/assets/primitive.vert
new file mode 100644
index 00000000..06bda084
--- /dev/null
+++ b/src/viewer3d/assets/primitive.vert
@@ -0,0 +1,150 @@
+#include <animation.glsl>
+
+
+uniform mat4 u_ViewProjectionMatrix;
+uniform mat4 u_ModelMatrix;
+uniform mat4 u_NormalMatrix;
+
+
+in vec3 a_position;
+out vec3 v_Position;
+
+#ifdef HAS_NORMAL_VEC3
+in vec3 a_normal;
+#endif
+
+#ifdef HAS_NORMAL_VEC3
+#ifdef HAS_TANGENT_VEC4
+in vec4 a_tangent;
+out mat3 v_TBN;
+#else
+out vec3 v_Normal;
+#endif
+#endif
+
+#ifdef HAS_TEXCOORD_0_VEC2
+in vec2 a_texcoord_0;
+#endif
+
+#ifdef HAS_TEXCOORD_1_VEC2
+in vec2 a_texcoord_1;
+#endif
+
+out vec2 v_texcoord_0;
+out vec2 v_texcoord_1;
+
+#ifdef HAS_COLOR_0_VEC3
+in vec3 a_color_0;
+out vec3 v_Color;
+#endif
+
+#ifdef HAS_COLOR_0_VEC4
+in vec4 a_color_0;
+out vec4 v_Color;
+#endif
+
+
+vec4 getPosition()
+{
+    vec4 pos = vec4(a_position, 1.0);
+
+#ifdef USE_MORPHING
+    pos += getTargetPosition(gl_VertexID);
+#endif
+
+#ifdef USE_SKINNING
+    pos = getSkinningMatrix() * pos;
+#endif
+
+    return pos;
+}
+
+
+#ifdef HAS_NORMAL_VEC3
+vec3 getNormal()
+{
+    vec3 normal = a_normal;
+
+#ifdef USE_MORPHING
+    normal += getTargetNormal(gl_VertexID);
+#endif
+
+#ifdef USE_SKINNING
+    normal = mat3(getSkinningNormalMatrix()) * normal;
+#endif
+
+    return normalize(normal);
+}
+#endif
+
+#ifdef HAS_NORMAL_VEC3
+#ifdef HAS_TANGENT_VEC4
+vec3 getTangent()
+{
+    vec3 tangent = a_tangent.xyz;
+
+#ifdef USE_MORPHING
+    tangent += getTargetTangent(gl_VertexID);
+#endif
+
+#ifdef USE_SKINNING
+    tangent = mat3(getSkinningMatrix()) * tangent;
+#endif
+
+    return normalize(tangent);
+}
+#endif
+#endif
+
+
+void main()
+{
+    gl_PointSize = 1.0f;
+    vec4 pos = u_ModelMatrix * getPosition();
+    v_Position = vec3(pos.xyz) / pos.w;
+
+#ifdef HAS_NORMAL_VEC3
+#ifdef HAS_TANGENT_VEC4
+    vec3 tangent = getTangent();
+    vec3 normalW = normalize(vec3(u_NormalMatrix * vec4(getNormal(), 0.0)));
+    vec3 tangentW = normalize(vec3(u_ModelMatrix * vec4(tangent, 0.0)));
+    vec3 bitangentW = cross(normalW, tangentW) * a_tangent.w;
+    v_TBN = mat3(tangentW, bitangentW, normalW);
+#else
+    v_Normal = normalize(vec3(u_NormalMatrix * vec4(getNormal(), 0.0)));
+#endif
+#endif
+
+    v_texcoord_0 = vec2(0.0, 0.0);
+    v_texcoord_1 = vec2(0.0, 0.0);
+
+#ifdef HAS_TEXCOORD_0_VEC2
+    v_texcoord_0 = a_texcoord_0;
+#endif
+
+#ifdef HAS_TEXCOORD_1_VEC2
+    v_texcoord_1 = a_texcoord_1;
+#endif
+
+#ifdef USE_MORPHING
+    v_texcoord_0 += getTargetTexCoord0(gl_VertexID);
+    v_texcoord_1 += getTargetTexCoord1(gl_VertexID);
+#endif
+
+
+#if defined(HAS_COLOR_0_VEC3) 
+    v_Color = a_color_0;
+#if defined(USE_MORPHING)
+    v_Color = clamp(v_Color + getTargetColor0(gl_VertexID).xyz, 0.0f, 1.0f);
+#endif
+#endif
+
+#if defined(HAS_COLOR_0_VEC4) 
+    v_Color = a_color_0;
+#if defined(USE_MORPHING)
+    v_Color = clamp(v_Color + getTargetColor0(gl_VertexID), 0.0f, 1.0f);
+#endif
+#endif
+
+    gl_Position = u_ViewProjectionMatrix * pos;
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/punctual.glsl b/src/viewer3d/assets/punctual.glsl
new file mode 100644
index 00000000..8de31b50
--- /dev/null
+++ b/src/viewer3d/assets/punctual.glsl
@@ -0,0 +1,141 @@
+// KHR_lights_punctual extension.
+// see https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
+struct Light
+{
+    vec3 direction;
+    float range;
+
+    vec3 color;
+    float intensity;
+
+    vec3 position;
+    float innerConeCos;
+
+    float outerConeCos;
+    int type;
+};
+
+
+const int LightType_Directional = 0;
+const int LightType_Point = 1;
+const int LightType_Spot = 2;
+
+
+#ifdef USE_PUNCTUAL
+uniform Light u_Lights[LIGHT_COUNT + 1]; //Array [0] is not allowed
+#endif
+
+
+// https://github.com/KhronosGroup/glTF/blob/master/extensions/2.0/Khronos/KHR_lights_punctual/README.md#range-property
+float getRangeAttenuation(float range, float distance)
+{
+    if (range <= 0.0)
+    {
+        // negative range means unlimited
+        return 1.0 / pow(distance, 2.0);
+    }
+    return max(min(1.0 - pow(distance / range, 4.0), 1.0), 0.0) / pow(distance, 2.0);
+}
+
+
+// https://github.com/KhronosGroup/glTF/blob/master/extensions/2.0/Khronos/KHR_lights_punctual/README.md#inner-and-outer-cone-angles
+float getSpotAttenuation(vec3 pointToLight, vec3 spotDirection, float outerConeCos, float innerConeCos)
+{
+    float actualCos = dot(normalize(spotDirection), normalize(-pointToLight));
+    if (actualCos > outerConeCos)
+    {
+        if (actualCos < innerConeCos)
+        {
+            return smoothstep(outerConeCos, innerConeCos, actualCos);
+        }
+        return 1.0;
+    }
+    return 0.0;
+}
+
+
+vec3 getLighIntensity(Light light, vec3 pointToLight)
+{
+    float rangeAttenuation = 1.0;
+    float spotAttenuation = 1.0;
+
+    if (light.type != LightType_Directional)
+    {
+        rangeAttenuation = getRangeAttenuation(light.range, length(pointToLight));
+    }
+    if (light.type == LightType_Spot)
+    {
+        spotAttenuation = getSpotAttenuation(pointToLight, light.direction, light.outerConeCos, light.innerConeCos);
+    }
+
+    return rangeAttenuation * spotAttenuation * light.intensity * light.color;
+}
+
+
+vec3 getPunctualRadianceTransmission(vec3 normal, vec3 view, vec3 pointToLight, float alphaRoughness,
+    vec3 f0, vec3 f90, vec3 baseColor, float ior)
+{
+    float transmissionRougness = applyIorToRoughness(alphaRoughness, ior);
+
+    vec3 n = normalize(normal);           // Outward direction of surface point
+    vec3 v = normalize(view);             // Direction from surface point to view
+    vec3 l = normalize(pointToLight);
+    vec3 l_mirror = normalize(l + 2.0*n*dot(-l, n));     // Mirror light reflection vector on surface
+    vec3 h = normalize(l_mirror + v);            // Halfway vector between transmission light vector and v
+
+    float D = D_GGX(clamp(dot(n, h), 0.0, 1.0), transmissionRougness);
+    vec3 F = F_Schlick(f0, f90, clamp(dot(v, h), 0.0, 1.0));
+    float Vis = V_GGX(clamp(dot(n, l_mirror), 0.0, 1.0), clamp(dot(n, v), 0.0, 1.0), transmissionRougness);
+
+    // Transmission BTDF
+    return (1.0 - F) * baseColor * D * Vis;
+}
+
+
+vec3 getPunctualRadianceClearCoat(vec3 clearcoatNormal, vec3 v, vec3 l, vec3 h, float VdotH, vec3 f0, vec3 f90, float clearcoatRoughness)
+{
+    float NdotL = clampedDot(clearcoatNormal, l);
+    float NdotV = clampedDot(clearcoatNormal, v);
+    float NdotH = clampedDot(clearcoatNormal, h);
+    return NdotL * BRDF_specularGGX(f0, f90, clearcoatRoughness * clearcoatRoughness, 1.0, VdotH, NdotL, NdotV, NdotH);
+}
+
+
+vec3 getPunctualRadianceSheen(vec3 sheenColor, float sheenRoughness, float NdotL, float NdotV, float NdotH)
+{
+    return NdotL * BRDF_specularSheen(sheenColor, sheenRoughness, NdotL, NdotV, NdotH);
+}
+
+
+// Compute attenuated light as it travels through a volume.
+vec3 applyVolumeAttenuation(vec3 radiance, float transmissionDistance, vec3 attenuationColor, float attenuationDistance)
+{
+    if (attenuationDistance == 0.0)
+    {
+        // Attenuation distance is +∞ (which we indicate by zero), i.e. the transmitted color is not attenuated at all.
+        return radiance;
+    }
+    else
+    {
+        // Compute light attenuation using Beer's law.
+        vec3 attenuationCoefficient = -log(attenuationColor) / attenuationDistance;
+        vec3 transmittance = exp(-attenuationCoefficient * transmissionDistance); // Beer's law
+        return transmittance * radiance;
+    }
+}
+
+
+vec3 getVolumeTransmissionRay(vec3 n, vec3 v, float thickness, float ior, mat4 modelMatrix)
+{
+    // Direction of refracted light.
+    vec3 refractionVector = refract(-v, normalize(n), 1.0 / ior);
+
+    // Compute rotation-independant scaling of the model matrix.
+    vec3 modelScale;
+    modelScale.x = length(vec3(modelMatrix[0].xyz));
+    modelScale.y = length(vec3(modelMatrix[1].xyz));
+    modelScale.z = length(vec3(modelMatrix[2].xyz));
+
+    // The thickness is specified in local space.
+    return normalize(refractionVector) * thickness * modelScale;
+}
\ No newline at end of file
diff --git a/src/viewer3d/assets/textures.glsl b/src/viewer3d/assets/textures.glsl
new file mode 100644
index 00000000..fef8e329
--- /dev/null
+++ b/src/viewer3d/assets/textures.glsl
@@ -0,0 +1,375 @@
+// IBL
+
+
+uniform int u_MipCount;
+uniform samplerCube u_LambertianEnvSampler;
+uniform samplerCube u_GGXEnvSampler;
+uniform sampler2D u_GGXLUT;
+uniform samplerCube u_CharlieEnvSampler;
+uniform sampler2D u_CharlieLUT;
+uniform sampler2D u_SheenELUT;
+uniform mat3 u_EnvRotation;
+
+
+// General Material
+
+
+uniform sampler2D u_NormalSampler;
+uniform float u_NormalScale;
+uniform int u_NormalUVSet;
+uniform mat3 u_NormalUVTransform;
+
+uniform vec3 u_EmissiveFactor;
+uniform sampler2D u_EmissiveSampler;
+uniform int u_EmissiveUVSet;
+uniform mat3 u_EmissiveUVTransform;
+
+uniform sampler2D u_OcclusionSampler;
+uniform int u_OcclusionUVSet;
+uniform float u_OcclusionStrength;
+uniform mat3 u_OcclusionUVTransform;
+
+
+in vec2 v_texcoord_0;
+in vec2 v_texcoord_1;
+
+
+vec2 getNormalUV()
+{
+    vec3 uv = vec3(u_NormalUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_NORMAL_UV_TRANSFORM
+    uv = u_NormalUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+
+vec2 getEmissiveUV()
+{
+    vec3 uv = vec3(u_EmissiveUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_EMISSIVE_UV_TRANSFORM
+    uv = u_EmissiveUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+
+vec2 getOcclusionUV()
+{
+    vec3 uv = vec3(u_OcclusionUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_OCCLUSION_UV_TRANSFORM
+    uv = u_OcclusionUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+
+// Metallic Roughness Material
+
+
+#ifdef MATERIAL_METALLICROUGHNESS
+
+uniform sampler2D u_BaseColorSampler;
+uniform int u_BaseColorUVSet;
+uniform mat3 u_BaseColorUVTransform;
+
+uniform sampler2D u_MetallicRoughnessSampler;
+uniform int u_MetallicRoughnessUVSet;
+uniform mat3 u_MetallicRoughnessUVTransform;
+
+uniform sampler2D u_MetalnessSampler;
+uniform int u_MetalnessUVSet;
+uniform mat3 u_MetalnessUVTransform;
+
+uniform sampler2D u_RoughnessSampler;
+uniform int u_RoughnessUVSet;
+uniform mat3 u_RoughnessUVTransform;
+
+vec2 getBaseColorUV()
+{
+    vec3 uv = vec3(u_BaseColorUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_BASECOLOR_UV_TRANSFORM
+    uv = u_BaseColorUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+vec2 getMetallicRoughnessUV()
+{
+    vec3 uv = vec3(u_MetallicRoughnessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_METALLICROUGHNESS_UV_TRANSFORM
+    uv = u_MetallicRoughnessUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+vec2 getMetalnessUV()
+{
+    vec3 uv = vec3(u_MetalnessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_METALNESS_UV_TRANSFORM
+    uv = u_MetalnessUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+vec2 getRoughnessUV()
+{
+    vec3 uv = vec3(u_RoughnessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_ROUGHNESS_UV_TRANSFORM
+    uv = u_RoughnessUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+#endif
+
+
+// Specular Glossiness Material
+
+
+#ifdef MATERIAL_SPECULARGLOSSINESS
+
+uniform sampler2D u_DiffuseSampler;
+uniform int u_DiffuseUVSet;
+uniform mat3 u_DiffuseUVTransform;
+
+uniform sampler2D u_SpecularGlossinessSampler;
+uniform int u_SpecularGlossinessUVSet;
+uniform mat3 u_SpecularGlossinessUVTransform;
+
+
+vec2 getSpecularGlossinessUV()
+{
+    vec3 uv = vec3(u_SpecularGlossinessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_SPECULARGLOSSINESS_UV_TRANSFORM
+    uv = u_SpecularGlossinessUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+vec2 getDiffuseUV()
+{
+    vec3 uv = vec3(u_DiffuseUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+
+#ifdef HAS_DIFFUSE_UV_TRANSFORM
+    uv = u_DiffuseUVTransform * uv;
+#endif
+
+    return uv.xy;
+}
+
+#endif
+
+
+// Clearcoat Material
+
+
+#ifdef MATERIAL_CLEARCOAT
+
+uniform sampler2D u_ClearcoatSampler;
+uniform int u_ClearcoatUVSet;
+uniform mat3 u_ClearcoatUVTransform;
+
+uniform sampler2D u_ClearcoatRoughnessSampler;
+uniform int u_ClearcoatRoughnessUVSet;
+uniform mat3 u_ClearcoatRoughnessUVTransform;
+
+uniform sampler2D u_ClearcoatNormalSampler;
+uniform int u_ClearcoatNormalUVSet;
+uniform mat3 u_ClearcoatNormalUVTransform;
+uniform float u_ClearcoatNormalScale;
+
+
+vec2 getClearcoatUV()
+{
+    vec3 uv = vec3(u_ClearcoatUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_CLEARCOAT_UV_TRANSFORM
+    uv = u_ClearcoatUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+vec2 getClearcoatRoughnessUV()
+{
+    vec3 uv = vec3(u_ClearcoatRoughnessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_CLEARCOATROUGHNESS_UV_TRANSFORM
+    uv = u_ClearcoatRoughnessUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+vec2 getClearcoatNormalUV()
+{
+    vec3 uv = vec3(u_ClearcoatNormalUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_CLEARCOATNORMAL_UV_TRANSFORM
+    uv = u_ClearcoatNormalUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+#endif
+
+
+// Sheen Material
+
+
+#ifdef MATERIAL_SHEEN
+
+uniform sampler2D u_SheenColorSampler;
+uniform int u_SheenColorUVSet;
+uniform mat3 u_SheenColorUVTransform;
+uniform sampler2D u_SheenRoughnessSampler;
+uniform int u_SheenRoughnessUVSet;
+uniform mat3 u_SheenRoughnessUVTransform;
+
+
+vec2 getSheenColorUV()
+{
+    vec3 uv = vec3(u_SheenColorUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_SHEENCOLOR_UV_TRANSFORM
+    uv = u_SheenColorUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+vec2 getSheenRoughnessUV()
+{
+    vec3 uv = vec3(u_SheenRoughnessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_SHEENROUGHNESS_UV_TRANSFORM
+    uv = u_SheenRoughnessUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+#endif
+
+
+// Specular Material
+
+
+#ifdef MATERIAL_SPECULAR
+
+uniform sampler2D u_SpecularSampler;
+uniform int u_SpecularUVSet;
+uniform mat3 u_SpecularUVTransform;
+uniform sampler2D u_SpecularColorSampler;
+uniform int u_SpecularColorUVSet;
+uniform mat3 u_SpecularColorUVTransform;
+
+
+vec2 getSpecularUV()
+{
+    vec3 uv = vec3(u_SpecularUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_SPECULAR_UV_TRANSFORM
+    uv = u_SpecularUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+vec2 getSpecularColorUV()
+{
+    vec3 uv = vec3(u_SpecularColorUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_SPECULARCOLOR_UV_TRANSFORM
+    uv = u_SpecularColorUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+#endif
+
+
+// Transmission Material
+
+
+#ifdef MATERIAL_TRANSMISSION
+
+uniform sampler2D u_TransmissionSampler;
+uniform int u_TransmissionUVSet;
+uniform mat3 u_TransmissionUVTransform;
+uniform sampler2D u_TransmissionFramebufferSampler;
+uniform ivec2 u_TransmissionFramebufferSize;
+
+
+vec2 getTransmissionUV()
+{
+    vec3 uv = vec3(u_TransmissionUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_TRANSMISSION_UV_TRANSFORM
+    uv = u_TransmissionUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+#endif
+
+
+// Volume Material
+
+
+#ifdef MATERIAL_VOLUME
+
+uniform sampler2D u_ThicknessSampler;
+uniform int u_ThicknessUVSet;
+uniform mat3 u_ThicknessUVTransform;
+
+
+vec2 getThicknessUV()
+{
+    vec3 uv = vec3(u_ThicknessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_THICKNESS_UV_TRANSFORM
+    uv = u_ThicknessUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+#endif
+
+
+// Iridescence
+
+
+#ifdef MATERIAL_IRIDESCENCE
+
+uniform sampler2D u_IridescenceSampler;
+uniform int u_IridescenceUVSet;
+uniform mat3 u_IridescenceUVTransform;
+
+uniform sampler2D u_IridescenceThicknessSampler;
+uniform int u_IridescenceThicknessUVSet;
+uniform mat3 u_IridescenceThicknessUVTransform;
+
+
+vec2 getIridescenceUV()
+{
+    vec3 uv = vec3(u_IridescenceUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_IRIDESCENCE_UV_TRANSFORM
+    uv = u_IridescenceUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+vec2 getIridescenceThicknessUV()
+{
+    vec3 uv = vec3(u_IridescenceThicknessUVSet < 1 ? v_texcoord_0 : v_texcoord_1, 1.0);
+#ifdef HAS_IRIDESCENCETHICKNESS_UV_TRANSFORM
+    uv = u_IridescenceThicknessUVTransform * uv;
+#endif
+    return uv.xy;
+}
+
+#endif
\ No newline at end of file
diff --git a/src/viewer3d/assets/tonemapping.glsl b/src/viewer3d/assets/tonemapping.glsl
new file mode 100644
index 00000000..a15ff2cb
--- /dev/null
+++ b/src/viewer3d/assets/tonemapping.glsl
@@ -0,0 +1,112 @@
+uniform float u_Exposure;
+
+
+// NOTE: I suspect Qt applies gamma to its FBOs
+// so i'm removing gamma correction here
+const float GAMMA = 2.2;
+// const float GAMMA = 1.0;
+const float INV_GAMMA = 1.0 / GAMMA;
+
+
+// sRGB => XYZ => D65_2_D60 => AP1 => RRT_SAT
+const mat3 ACESInputMat = mat3
+(
+    0.59719, 0.07600, 0.02840,
+    0.35458, 0.90834, 0.13383,
+    0.04823, 0.01566, 0.83777
+);
+
+
+// ODT_SAT => XYZ => D60_2_D65 => sRGB
+const mat3 ACESOutputMat = mat3
+(
+    1.60475, -0.10208, -0.00327,
+    -0.53108,  1.10813, -0.07276,
+    -0.07367, -0.00605,  1.07602
+);
+
+
+// linear to sRGB approximation
+// see http://chilliant.blogspot.com/2012/08/srgb-approximations-for-hlsl.html
+vec3 linearTosRGB(vec3 color)
+{
+    return pow(color, vec3(INV_GAMMA));
+}
+
+
+// sRGB to linear approximation
+// see http://chilliant.blogspot.com/2012/08/srgb-approximations-for-hlsl.html
+vec3 sRGBToLinear(vec3 srgbIn)
+{
+    return vec3(pow(srgbIn.xyz, vec3(GAMMA)));
+}
+
+
+vec4 sRGBToLinear(vec4 srgbIn)
+{
+    return vec4(sRGBToLinear(srgbIn.xyz), srgbIn.w);
+}
+
+
+// ACES tone map (faster approximation)
+// see: https://knarkowicz.wordpress.com/2016/01/06/aces-filmic-tone-mapping-curve/
+vec3 toneMapACES_Narkowicz(vec3 color)
+{
+    const float A = 2.51;
+    const float B = 0.03;
+    const float C = 2.43;
+    const float D = 0.59;
+    const float E = 0.14;
+    return clamp((color * (A * color + B)) / (color * (C * color + D) + E), 0.0, 1.0);
+}
+
+
+// ACES filmic tone map approximation
+// see https://github.com/TheRealMJP/BakingLab/blob/master/BakingLab/ACES.hlsl
+vec3 RRTAndODTFit(vec3 color)
+{
+    vec3 a = color * (color + 0.0245786) - 0.000090537;
+    vec3 b = color * (0.983729 * color + 0.4329510) + 0.238081;
+    return a / b;
+}
+
+
+// tone mapping 
+vec3 toneMapACES_Hill(vec3 color)
+{
+    color = ACESInputMat * color;
+
+    // Apply RRT and ODT
+    color = RRTAndODTFit(color);
+
+    color = ACESOutputMat * color;
+
+    // Clamp to [0, 1]
+    color = clamp(color, 0.0, 1.0);
+
+    return color;
+}
+
+
+vec3 toneMap(vec3 color)
+{
+    color *= u_Exposure;
+
+#ifdef TONEMAP_ACES_NARKOWICZ
+    color = toneMapACES_Narkowicz(color);
+#endif
+
+#ifdef TONEMAP_ACES_HILL
+    color = toneMapACES_Hill(color);
+#endif
+
+#ifdef TONEMAP_ACES_HILL_EXPOSURE_BOOST
+    // boost exposure as discussed in https://github.com/mrdoob/three.js/pull/19621
+    // this factor is based on the exposure correction of Krzysztof Narkowicz in his
+    // implemetation of ACES tone mapping
+    color /= 0.6;
+    color = toneMapACES_Hill(color);
+#endif
+
+    return linearTosRGB(color);
+}
\ No newline at end of file
diff --git a/src/viewer3d/geometry/geometry.h b/src/viewer3d/geometry/geometry.h
new file mode 100644
index 00000000..50244fdc
--- /dev/null
+++ b/src/viewer3d/geometry/geometry.h
@@ -0,0 +1,18 @@
+#pragma once
+#include <math.h>
+
+class Mesh;
+class QOpenGLFunctions;
+
+// https://github.com/mrdoob/three.js/blob/master/src/geometries/SphereGeometry.js
+Mesh* createSphere(QOpenGLFunctions* gl, float radius = 1,
+                   int widthSegments = 32, int heightSegments = 16,
+                   float phiStart = 0, float phiLength = M_PI * 2,
+                   float thetaStart = 0, float thetaLength = M_PI);
+
+// other sources:
+// https://www.danielsieger.com/blog/2021/03/27/generating-spheres.html
+// https://schneide.blog/2016/07/15/generating-an-icosphere-in-c/
+// https://github.com/caosdoar/spheres/blob/master/src/spheres.cpp
+// VERY GOOD:
+// http://www.songho.ca/opengl/gl_sphere.html
\ No newline at end of file
diff --git a/src/viewer3d/geometry/sphere.cpp b/src/viewer3d/geometry/sphere.cpp
new file mode 100644
index 00000000..4d50edac
--- /dev/null
+++ b/src/viewer3d/geometry/sphere.cpp
@@ -0,0 +1,150 @@
+#include "../renderer/renderer.h"
+#include "geometry.h"
+#include <QOpenGLBuffer>
+#include <QOpenGLFunctions>
+#include <QOpenGLVertexArrayObject>
+#include <algorithm>
+#include <math.h>
+
+#define BUFFER_OFFSET(i) ((char*)NULL + (i))
+
+Mesh* createSphere(QOpenGLFunctions* gl, float radius, int widthSegments,
+                   int heightSegments, float phiStart, float phiLength,
+                   float thetaStart, float thetaLength)
+{
+    const float uvScaleX = 2;
+    const float uvScaleY = 1;
+
+    widthSegments = std::max(3.0, std::floor(widthSegments));
+    heightSegments = std::max(2.0, std::floor(heightSegments));
+
+    auto thetaEnd = std::min((double)thetaStart + thetaLength, M_PI);
+
+    int index = 0;
+    QVector<QVector<unsigned int>> grid;
+
+    QVector3D vertex;
+
+    // buffers
+    QVector<unsigned int> indices;
+    QVector<float> vertices;
+    QVector<float> normals;
+    QVector<float> uvs;
+
+    for (int iy = 0; iy <= heightSegments; iy++) {
+        QVector<unsigned int> verticesRow;
+
+        auto v = iy / (float)heightSegments;
+
+        auto uOffset = 0;
+        if (iy == 0 && thetaStart == 0) {
+
+            uOffset = 0.5 / widthSegments;
+        }
+        else if (iy == heightSegments && thetaEnd == M_PI) {
+
+            uOffset = -0.5 / widthSegments;
+        }
+
+        for (int ix = 0; ix <= widthSegments; ix++) {
+
+            auto u = ix / (float)widthSegments;
+
+            // vertex
+
+            auto x = -radius * std::cos(phiStart + u * phiLength) *
+                     std::sin(thetaStart + v * thetaLength);
+            auto y = radius * std::cos(thetaStart + v * thetaLength);
+            auto z = radius * std::sin(phiStart + u * phiLength) *
+                     std::sin(thetaStart + v * thetaLength);
+
+            vertices.append({x, y, z});
+
+            // normal
+            QVector3D normal(x, y, z);
+            normal.normalize();
+            normals.append({normal.x(), normal.y(), normal.z()});
+
+            // uv
+
+            uvs.append({(u + uOffset) * uvScaleX, (1 - v) * uvScaleY});
+
+            verticesRow.append(index++);
+        }
+
+        grid.append(verticesRow);
+    }
+
+    for (int iy = 0; iy < heightSegments; iy++) {
+
+        for (int ix = 0; ix < widthSegments; ix++) {
+
+            auto a = grid[iy][ix + 1];
+            auto b = grid[iy][ix];
+            auto c = grid[iy + 1][ix];
+            auto d = grid[iy + 1][ix + 1];
+
+            if (iy != 0 || thetaStart > 0)
+                indices.append({a, b, d});
+            if (iy != heightSegments - 1 || thetaEnd < M_PI)
+                indices.append({b, c, d});
+        }
+    }
+
+    // build
+    QOpenGLVertexArrayObject* vao = new QOpenGLVertexArrayObject();
+    vao->create();
+    vao->bind();
+
+    QOpenGLBuffer* vbo;
+
+    // position
+    vbo = new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
+    vbo->create();
+    vbo->bind();
+    vbo->setUsagePattern(QOpenGLBuffer::StaticDraw);
+    vbo->allocate(vertices.data(), vertices.length() * sizeof(float));
+    gl->glEnableVertexAttribArray((int)VertexUsage::Position);
+    gl->glVertexAttribPointer((int)VertexUsage::Position, 3, GL_FLOAT, GL_FALSE,
+                              3 * sizeof(float), BUFFER_OFFSET(0));
+
+    // normal
+    vbo = new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
+    vbo->create();
+    vbo->bind();
+    vbo->setUsagePattern(QOpenGLBuffer::StaticDraw);
+    vbo->allocate(normals.data(), normals.length() * sizeof(float));
+    gl->glEnableVertexAttribArray((int)VertexUsage::Normal);
+    gl->glVertexAttribPointer((int)VertexUsage::Normal, 3, GL_FLOAT, GL_FALSE,
+                              3 * sizeof(float), BUFFER_OFFSET(0));
+
+    // uv
+    vbo = new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
+    vbo->create();
+    vbo->bind();
+    vbo->setUsagePattern(QOpenGLBuffer::StaticDraw);
+    vbo->allocate(uvs.data(), uvs.length() * sizeof(float));
+    gl->glEnableVertexAttribArray((int)VertexUsage::TexCoord0);
+    gl->glVertexAttribPointer((int)VertexUsage::TexCoord0, 2, GL_FLOAT,
+                              GL_FALSE, 2 * sizeof(float), BUFFER_OFFSET(0));
+
+    vao->release();
+
+    // indices
+    auto ibo = new QOpenGLBuffer(QOpenGLBuffer::IndexBuffer);
+    ibo->create();
+    ibo->bind();
+    ibo->setUsagePattern(QOpenGLBuffer::StaticDraw);
+    ibo->allocate(indices.data(), indices.length() * sizeof(unsigned int));
+
+    auto mesh = new Mesh();
+    mesh->vao = vao;
+    mesh->meshType = MeshType::Generated;
+    mesh->indexBuffer = ibo;
+    mesh->numElements = indices.count();
+    mesh->indexByteOffset = 0;
+    mesh->indexType = GL_UNSIGNED_INT;
+    mesh->primitiveMode = GL_TRIANGLES;
+
+    return mesh;
+}
\ No newline at end of file
diff --git a/src/components/ExportMenu.vue b/src/viewer3d/gltf/gltf.cpp
similarity index 100%
rename from src/components/ExportMenu.vue
rename to src/viewer3d/gltf/gltf.cpp
diff --git a/src/viewer3d/gltf/json.hpp b/src/viewer3d/gltf/json.hpp
new file mode 100644
index 00000000..26684068
--- /dev/null
+++ b/src/viewer3d/gltf/json.hpp
@@ -0,0 +1,26753 @@
+/*
+    __ _____ _____ _____
+ __|  |   __|     |   | |  JSON for Modern C++
+|  |  |__   |  |  | | | |  version 3.10.4
+|_____|_____|_____|_|___|  https://github.com/nlohmann/json
+
+Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
+Copyright (c) 2013-2019 Niels Lohmann <http://nlohmann.me>.
+
+Permission is hereby  granted, free of charge, to any  person obtaining a copy
+of this software and associated  documentation files (the "Software"), to deal
+in the Software  without restriction, including without  limitation the rights
+to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
+copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
+IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
+FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
+AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
+LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#ifndef INCLUDE_NLOHMANN_JSON_HPP_
+#define INCLUDE_NLOHMANN_JSON_HPP_
+
+#define NLOHMANN_JSON_VERSION_MAJOR 3
+#define NLOHMANN_JSON_VERSION_MINOR 10
+#define NLOHMANN_JSON_VERSION_PATCH 4
+
+#include <algorithm> // all_of, find, for_each
+#include <cstddef> // nullptr_t, ptrdiff_t, size_t
+#include <functional> // hash, less
+#include <initializer_list> // initializer_list
+#ifndef JSON_NO_IO
+    #include <iosfwd> // istream, ostream
+#endif  // JSON_NO_IO
+#include <iterator> // random_access_iterator_tag
+#include <memory> // unique_ptr
+#include <numeric> // accumulate
+#include <string> // string, stoi, to_string
+#include <utility> // declval, forward, move, pair, swap
+#include <vector> // vector
+
+// #include <nlohmann/adl_serializer.hpp>
+
+
+#include <type_traits>
+#include <utility>
+
+// #include <nlohmann/detail/conversions/from_json.hpp>
+
+
+#include <algorithm> // transform
+#include <array> // array
+#include <forward_list> // forward_list
+#include <iterator> // inserter, front_inserter, end
+#include <map> // map
+#include <string> // string
+#include <tuple> // tuple, make_tuple
+#include <type_traits> // is_arithmetic, is_same, is_enum, underlying_type, is_convertible
+#include <unordered_map> // unordered_map
+#include <utility> // pair, declval
+#include <valarray> // valarray
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+
+#include <exception> // exception
+#include <stdexcept> // runtime_error
+#include <string> // to_string
+#include <vector> // vector
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+#include <array> // array
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t
+#include <string> // string
+
+namespace nlohmann
+{
+namespace detail
+{
+///////////////////////////
+// JSON type enumeration //
+///////////////////////////
+
+/*!
+@brief the JSON type enumeration
+
+This enumeration collects the different JSON types. It is internally used to
+distinguish the stored values, and the functions @ref basic_json::is_null(),
+@ref basic_json::is_object(), @ref basic_json::is_array(),
+@ref basic_json::is_string(), @ref basic_json::is_boolean(),
+@ref basic_json::is_number() (with @ref basic_json::is_number_integer(),
+@ref basic_json::is_number_unsigned(), and @ref basic_json::is_number_float()),
+@ref basic_json::is_discarded(), @ref basic_json::is_primitive(), and
+@ref basic_json::is_structured() rely on it.
+
+@note There are three enumeration entries (number_integer, number_unsigned, and
+number_float), because the library distinguishes these three types for numbers:
+@ref basic_json::number_unsigned_t is used for unsigned integers,
+@ref basic_json::number_integer_t is used for signed integers, and
+@ref basic_json::number_float_t is used for floating-point numbers or to
+approximate integers which do not fit in the limits of their respective type.
+
+@sa see @ref basic_json::basic_json(const value_t value_type) -- create a JSON
+value with the default value for a given type
+
+@since version 1.0.0
+*/
+enum class value_t : std::uint8_t
+{
+    null,             ///< null value
+    object,           ///< object (unordered set of name/value pairs)
+    array,            ///< array (ordered collection of values)
+    string,           ///< string value
+    boolean,          ///< boolean value
+    number_integer,   ///< number value (signed integer)
+    number_unsigned,  ///< number value (unsigned integer)
+    number_float,     ///< number value (floating-point)
+    binary,           ///< binary array (ordered collection of bytes)
+    discarded         ///< discarded by the parser callback function
+};
+
+/*!
+@brief comparison operator for JSON types
+
+Returns an ordering that is similar to Python:
+- order: null < boolean < number < object < array < string < binary
+- furthermore, each type is not smaller than itself
+- discarded values are not comparable
+- binary is represented as a b"" string in python and directly comparable to a
+  string; however, making a binary array directly comparable with a string would
+  be surprising behavior in a JSON file.
+
+@since version 1.0.0
+*/
+inline bool operator<(const value_t lhs, const value_t rhs) noexcept
+{
+    static constexpr std::array<std::uint8_t, 9> order = {{
+            0 /* null */, 3 /* object */, 4 /* array */, 5 /* string */,
+            1 /* boolean */, 2 /* integer */, 2 /* unsigned */, 2 /* float */,
+            6 /* binary */
+        }
+    };
+
+    const auto l_index = static_cast<std::size_t>(lhs);
+    const auto r_index = static_cast<std::size_t>(rhs);
+    return l_index < order.size() && r_index < order.size() && order[l_index] < order[r_index];
+}
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/string_escape.hpp>
+
+
+#include <string>
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+#include <utility> // declval, pair
+// #include <nlohmann/thirdparty/hedley/hedley.hpp>
+
+
+/* Hedley - https://nemequ.github.io/hedley
+ * Created by Evan Nemerson <evan@nemerson.com>
+ *
+ * To the extent possible under law, the author(s) have dedicated all
+ * copyright and related and neighboring rights to this software to
+ * the public domain worldwide. This software is distributed without
+ * any warranty.
+ *
+ * For details, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+ * SPDX-License-Identifier: CC0-1.0
+ */
+
+#if !defined(JSON_HEDLEY_VERSION) || (JSON_HEDLEY_VERSION < 15)
+#if defined(JSON_HEDLEY_VERSION)
+    #undef JSON_HEDLEY_VERSION
+#endif
+#define JSON_HEDLEY_VERSION 15
+
+#if defined(JSON_HEDLEY_STRINGIFY_EX)
+    #undef JSON_HEDLEY_STRINGIFY_EX
+#endif
+#define JSON_HEDLEY_STRINGIFY_EX(x) #x
+
+#if defined(JSON_HEDLEY_STRINGIFY)
+    #undef JSON_HEDLEY_STRINGIFY
+#endif
+#define JSON_HEDLEY_STRINGIFY(x) JSON_HEDLEY_STRINGIFY_EX(x)
+
+#if defined(JSON_HEDLEY_CONCAT_EX)
+    #undef JSON_HEDLEY_CONCAT_EX
+#endif
+#define JSON_HEDLEY_CONCAT_EX(a,b) a##b
+
+#if defined(JSON_HEDLEY_CONCAT)
+    #undef JSON_HEDLEY_CONCAT
+#endif
+#define JSON_HEDLEY_CONCAT(a,b) JSON_HEDLEY_CONCAT_EX(a,b)
+
+#if defined(JSON_HEDLEY_CONCAT3_EX)
+    #undef JSON_HEDLEY_CONCAT3_EX
+#endif
+#define JSON_HEDLEY_CONCAT3_EX(a,b,c) a##b##c
+
+#if defined(JSON_HEDLEY_CONCAT3)
+    #undef JSON_HEDLEY_CONCAT3
+#endif
+#define JSON_HEDLEY_CONCAT3(a,b,c) JSON_HEDLEY_CONCAT3_EX(a,b,c)
+
+#if defined(JSON_HEDLEY_VERSION_ENCODE)
+    #undef JSON_HEDLEY_VERSION_ENCODE
+#endif
+#define JSON_HEDLEY_VERSION_ENCODE(major,minor,revision) (((major) * 1000000) + ((minor) * 1000) + (revision))
+
+#if defined(JSON_HEDLEY_VERSION_DECODE_MAJOR)
+    #undef JSON_HEDLEY_VERSION_DECODE_MAJOR
+#endif
+#define JSON_HEDLEY_VERSION_DECODE_MAJOR(version) ((version) / 1000000)
+
+#if defined(JSON_HEDLEY_VERSION_DECODE_MINOR)
+    #undef JSON_HEDLEY_VERSION_DECODE_MINOR
+#endif
+#define JSON_HEDLEY_VERSION_DECODE_MINOR(version) (((version) % 1000000) / 1000)
+
+#if defined(JSON_HEDLEY_VERSION_DECODE_REVISION)
+    #undef JSON_HEDLEY_VERSION_DECODE_REVISION
+#endif
+#define JSON_HEDLEY_VERSION_DECODE_REVISION(version) ((version) % 1000)
+
+#if defined(JSON_HEDLEY_GNUC_VERSION)
+    #undef JSON_HEDLEY_GNUC_VERSION
+#endif
+#if defined(__GNUC__) && defined(__GNUC_PATCHLEVEL__)
+    #define JSON_HEDLEY_GNUC_VERSION JSON_HEDLEY_VERSION_ENCODE(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
+#elif defined(__GNUC__)
+    #define JSON_HEDLEY_GNUC_VERSION JSON_HEDLEY_VERSION_ENCODE(__GNUC__, __GNUC_MINOR__, 0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_VERSION_CHECK)
+    #undef JSON_HEDLEY_GNUC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_GNUC_VERSION)
+    #define JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_GNUC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_MSVC_VERSION)
+    #undef JSON_HEDLEY_MSVC_VERSION
+#endif
+#if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 140000000) && !defined(__ICL)
+    #define JSON_HEDLEY_MSVC_VERSION JSON_HEDLEY_VERSION_ENCODE(_MSC_FULL_VER / 10000000, (_MSC_FULL_VER % 10000000) / 100000, (_MSC_FULL_VER % 100000) / 100)
+#elif defined(_MSC_FULL_VER) && !defined(__ICL)
+    #define JSON_HEDLEY_MSVC_VERSION JSON_HEDLEY_VERSION_ENCODE(_MSC_FULL_VER / 1000000, (_MSC_FULL_VER % 1000000) / 10000, (_MSC_FULL_VER % 10000) / 10)
+#elif defined(_MSC_VER) && !defined(__ICL)
+    #define JSON_HEDLEY_MSVC_VERSION JSON_HEDLEY_VERSION_ENCODE(_MSC_VER / 100, _MSC_VER % 100, 0)
+#endif
+
+#if defined(JSON_HEDLEY_MSVC_VERSION_CHECK)
+    #undef JSON_HEDLEY_MSVC_VERSION_CHECK
+#endif
+#if !defined(JSON_HEDLEY_MSVC_VERSION)
+    #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (0)
+#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
+    #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (_MSC_FULL_VER >= ((major * 10000000) + (minor * 100000) + (patch)))
+#elif defined(_MSC_VER) && (_MSC_VER >= 1200)
+    #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (_MSC_FULL_VER >= ((major * 1000000) + (minor * 10000) + (patch)))
+#else
+    #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (_MSC_VER >= ((major * 100) + (minor)))
+#endif
+
+#if defined(JSON_HEDLEY_INTEL_VERSION)
+    #undef JSON_HEDLEY_INTEL_VERSION
+#endif
+#if defined(__INTEL_COMPILER) && defined(__INTEL_COMPILER_UPDATE) && !defined(__ICL)
+    #define JSON_HEDLEY_INTEL_VERSION JSON_HEDLEY_VERSION_ENCODE(__INTEL_COMPILER / 100, __INTEL_COMPILER % 100, __INTEL_COMPILER_UPDATE)
+#elif defined(__INTEL_COMPILER) && !defined(__ICL)
+    #define JSON_HEDLEY_INTEL_VERSION JSON_HEDLEY_VERSION_ENCODE(__INTEL_COMPILER / 100, __INTEL_COMPILER % 100, 0)
+#endif
+
+#if defined(JSON_HEDLEY_INTEL_VERSION_CHECK)
+    #undef JSON_HEDLEY_INTEL_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_INTEL_VERSION)
+    #define JSON_HEDLEY_INTEL_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_INTEL_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_INTEL_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_INTEL_CL_VERSION)
+    #undef JSON_HEDLEY_INTEL_CL_VERSION
+#endif
+#if defined(__INTEL_COMPILER) && defined(__INTEL_COMPILER_UPDATE) && defined(__ICL)
+    #define JSON_HEDLEY_INTEL_CL_VERSION JSON_HEDLEY_VERSION_ENCODE(__INTEL_COMPILER, __INTEL_COMPILER_UPDATE, 0)
+#endif
+
+#if defined(JSON_HEDLEY_INTEL_CL_VERSION_CHECK)
+    #undef JSON_HEDLEY_INTEL_CL_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_INTEL_CL_VERSION)
+    #define JSON_HEDLEY_INTEL_CL_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_INTEL_CL_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_INTEL_CL_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_PGI_VERSION)
+    #undef JSON_HEDLEY_PGI_VERSION
+#endif
+#if defined(__PGI) && defined(__PGIC__) && defined(__PGIC_MINOR__) && defined(__PGIC_PATCHLEVEL__)
+    #define JSON_HEDLEY_PGI_VERSION JSON_HEDLEY_VERSION_ENCODE(__PGIC__, __PGIC_MINOR__, __PGIC_PATCHLEVEL__)
+#endif
+
+#if defined(JSON_HEDLEY_PGI_VERSION_CHECK)
+    #undef JSON_HEDLEY_PGI_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_PGI_VERSION)
+    #define JSON_HEDLEY_PGI_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_PGI_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_PGI_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_SUNPRO_VERSION)
+    #undef JSON_HEDLEY_SUNPRO_VERSION
+#endif
+#if defined(__SUNPRO_C) && (__SUNPRO_C > 0x1000)
+    #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((((__SUNPRO_C >> 16) & 0xf) * 10) + ((__SUNPRO_C >> 12) & 0xf), (((__SUNPRO_C >> 8) & 0xf) * 10) + ((__SUNPRO_C >> 4) & 0xf), (__SUNPRO_C & 0xf) * 10)
+#elif defined(__SUNPRO_C)
+    #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((__SUNPRO_C >> 8) & 0xf, (__SUNPRO_C >> 4) & 0xf, (__SUNPRO_C) & 0xf)
+#elif defined(__SUNPRO_CC) && (__SUNPRO_CC > 0x1000)
+    #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((((__SUNPRO_CC >> 16) & 0xf) * 10) + ((__SUNPRO_CC >> 12) & 0xf), (((__SUNPRO_CC >> 8) & 0xf) * 10) + ((__SUNPRO_CC >> 4) & 0xf), (__SUNPRO_CC & 0xf) * 10)
+#elif defined(__SUNPRO_CC)
+    #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((__SUNPRO_CC >> 8) & 0xf, (__SUNPRO_CC >> 4) & 0xf, (__SUNPRO_CC) & 0xf)
+#endif
+
+#if defined(JSON_HEDLEY_SUNPRO_VERSION_CHECK)
+    #undef JSON_HEDLEY_SUNPRO_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_SUNPRO_VERSION)
+    #define JSON_HEDLEY_SUNPRO_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_SUNPRO_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_SUNPRO_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_EMSCRIPTEN_VERSION)
+    #undef JSON_HEDLEY_EMSCRIPTEN_VERSION
+#endif
+#if defined(__EMSCRIPTEN__)
+    #define JSON_HEDLEY_EMSCRIPTEN_VERSION JSON_HEDLEY_VERSION_ENCODE(__EMSCRIPTEN_major__, __EMSCRIPTEN_minor__, __EMSCRIPTEN_tiny__)
+#endif
+
+#if defined(JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK)
+    #undef JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_EMSCRIPTEN_VERSION)
+    #define JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_EMSCRIPTEN_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_ARM_VERSION)
+    #undef JSON_HEDLEY_ARM_VERSION
+#endif
+#if defined(__CC_ARM) && defined(__ARMCOMPILER_VERSION)
+    #define JSON_HEDLEY_ARM_VERSION JSON_HEDLEY_VERSION_ENCODE(__ARMCOMPILER_VERSION / 1000000, (__ARMCOMPILER_VERSION % 1000000) / 10000, (__ARMCOMPILER_VERSION % 10000) / 100)
+#elif defined(__CC_ARM) && defined(__ARMCC_VERSION)
+    #define JSON_HEDLEY_ARM_VERSION JSON_HEDLEY_VERSION_ENCODE(__ARMCC_VERSION / 1000000, (__ARMCC_VERSION % 1000000) / 10000, (__ARMCC_VERSION % 10000) / 100)
+#endif
+
+#if defined(JSON_HEDLEY_ARM_VERSION_CHECK)
+    #undef JSON_HEDLEY_ARM_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_ARM_VERSION)
+    #define JSON_HEDLEY_ARM_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_ARM_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_ARM_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_IBM_VERSION)
+    #undef JSON_HEDLEY_IBM_VERSION
+#endif
+#if defined(__ibmxl__)
+    #define JSON_HEDLEY_IBM_VERSION JSON_HEDLEY_VERSION_ENCODE(__ibmxl_version__, __ibmxl_release__, __ibmxl_modification__)
+#elif defined(__xlC__) && defined(__xlC_ver__)
+    #define JSON_HEDLEY_IBM_VERSION JSON_HEDLEY_VERSION_ENCODE(__xlC__ >> 8, __xlC__ & 0xff, (__xlC_ver__ >> 8) & 0xff)
+#elif defined(__xlC__)
+    #define JSON_HEDLEY_IBM_VERSION JSON_HEDLEY_VERSION_ENCODE(__xlC__ >> 8, __xlC__ & 0xff, 0)
+#endif
+
+#if defined(JSON_HEDLEY_IBM_VERSION_CHECK)
+    #undef JSON_HEDLEY_IBM_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_IBM_VERSION)
+    #define JSON_HEDLEY_IBM_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_IBM_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_IBM_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TI_VERSION)
+    #undef JSON_HEDLEY_TI_VERSION
+#endif
+#if \
+    defined(__TI_COMPILER_VERSION__) && \
+    ( \
+      defined(__TMS470__) || defined(__TI_ARM__) || \
+      defined(__MSP430__) || \
+      defined(__TMS320C2000__) \
+    )
+#if (__TI_COMPILER_VERSION__ >= 16000000)
+    #define JSON_HEDLEY_TI_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+#endif
+
+#if defined(JSON_HEDLEY_TI_VERSION_CHECK)
+    #undef JSON_HEDLEY_TI_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_VERSION)
+    #define JSON_HEDLEY_TI_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TI_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL2000_VERSION)
+    #undef JSON_HEDLEY_TI_CL2000_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__TMS320C2000__)
+    #define JSON_HEDLEY_TI_CL2000_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL2000_VERSION_CHECK)
+    #undef JSON_HEDLEY_TI_CL2000_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL2000_VERSION)
+    #define JSON_HEDLEY_TI_CL2000_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL2000_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TI_CL2000_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL430_VERSION)
+    #undef JSON_HEDLEY_TI_CL430_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__MSP430__)
+    #define JSON_HEDLEY_TI_CL430_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL430_VERSION_CHECK)
+    #undef JSON_HEDLEY_TI_CL430_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL430_VERSION)
+    #define JSON_HEDLEY_TI_CL430_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL430_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TI_CL430_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TI_ARMCL_VERSION)
+    #undef JSON_HEDLEY_TI_ARMCL_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && (defined(__TMS470__) || defined(__TI_ARM__))
+    #define JSON_HEDLEY_TI_ARMCL_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+
+#if defined(JSON_HEDLEY_TI_ARMCL_VERSION_CHECK)
+    #undef JSON_HEDLEY_TI_ARMCL_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_ARMCL_VERSION)
+    #define JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_ARMCL_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL6X_VERSION)
+    #undef JSON_HEDLEY_TI_CL6X_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__TMS320C6X__)
+    #define JSON_HEDLEY_TI_CL6X_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL6X_VERSION_CHECK)
+    #undef JSON_HEDLEY_TI_CL6X_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL6X_VERSION)
+    #define JSON_HEDLEY_TI_CL6X_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL6X_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TI_CL6X_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL7X_VERSION)
+    #undef JSON_HEDLEY_TI_CL7X_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__C7000__)
+    #define JSON_HEDLEY_TI_CL7X_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+
+#if defined(JSON_HEDLEY_TI_CL7X_VERSION_CHECK)
+    #undef JSON_HEDLEY_TI_CL7X_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL7X_VERSION)
+    #define JSON_HEDLEY_TI_CL7X_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL7X_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TI_CL7X_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TI_CLPRU_VERSION)
+    #undef JSON_HEDLEY_TI_CLPRU_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__PRU__)
+    #define JSON_HEDLEY_TI_CLPRU_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+
+#if defined(JSON_HEDLEY_TI_CLPRU_VERSION_CHECK)
+    #undef JSON_HEDLEY_TI_CLPRU_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CLPRU_VERSION)
+    #define JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CLPRU_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_CRAY_VERSION)
+    #undef JSON_HEDLEY_CRAY_VERSION
+#endif
+#if defined(_CRAYC)
+    #if defined(_RELEASE_PATCHLEVEL)
+        #define JSON_HEDLEY_CRAY_VERSION JSON_HEDLEY_VERSION_ENCODE(_RELEASE_MAJOR, _RELEASE_MINOR, _RELEASE_PATCHLEVEL)
+    #else
+        #define JSON_HEDLEY_CRAY_VERSION JSON_HEDLEY_VERSION_ENCODE(_RELEASE_MAJOR, _RELEASE_MINOR, 0)
+    #endif
+#endif
+
+#if defined(JSON_HEDLEY_CRAY_VERSION_CHECK)
+    #undef JSON_HEDLEY_CRAY_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_CRAY_VERSION)
+    #define JSON_HEDLEY_CRAY_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_CRAY_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_CRAY_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_IAR_VERSION)
+    #undef JSON_HEDLEY_IAR_VERSION
+#endif
+#if defined(__IAR_SYSTEMS_ICC__)
+    #if __VER__ > 1000
+        #define JSON_HEDLEY_IAR_VERSION JSON_HEDLEY_VERSION_ENCODE((__VER__ / 1000000), ((__VER__ / 1000) % 1000), (__VER__ % 1000))
+    #else
+        #define JSON_HEDLEY_IAR_VERSION JSON_HEDLEY_VERSION_ENCODE(__VER__ / 100, __VER__ % 100, 0)
+    #endif
+#endif
+
+#if defined(JSON_HEDLEY_IAR_VERSION_CHECK)
+    #undef JSON_HEDLEY_IAR_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_IAR_VERSION)
+    #define JSON_HEDLEY_IAR_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_IAR_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_IAR_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_TINYC_VERSION)
+    #undef JSON_HEDLEY_TINYC_VERSION
+#endif
+#if defined(__TINYC__)
+    #define JSON_HEDLEY_TINYC_VERSION JSON_HEDLEY_VERSION_ENCODE(__TINYC__ / 1000, (__TINYC__ / 100) % 10, __TINYC__ % 100)
+#endif
+
+#if defined(JSON_HEDLEY_TINYC_VERSION_CHECK)
+    #undef JSON_HEDLEY_TINYC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TINYC_VERSION)
+    #define JSON_HEDLEY_TINYC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TINYC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_TINYC_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_DMC_VERSION)
+    #undef JSON_HEDLEY_DMC_VERSION
+#endif
+#if defined(__DMC__)
+    #define JSON_HEDLEY_DMC_VERSION JSON_HEDLEY_VERSION_ENCODE(__DMC__ >> 8, (__DMC__ >> 4) & 0xf, __DMC__ & 0xf)
+#endif
+
+#if defined(JSON_HEDLEY_DMC_VERSION_CHECK)
+    #undef JSON_HEDLEY_DMC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_DMC_VERSION)
+    #define JSON_HEDLEY_DMC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_DMC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_DMC_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_COMPCERT_VERSION)
+    #undef JSON_HEDLEY_COMPCERT_VERSION
+#endif
+#if defined(__COMPCERT_VERSION__)
+    #define JSON_HEDLEY_COMPCERT_VERSION JSON_HEDLEY_VERSION_ENCODE(__COMPCERT_VERSION__ / 10000, (__COMPCERT_VERSION__ / 100) % 100, __COMPCERT_VERSION__ % 100)
+#endif
+
+#if defined(JSON_HEDLEY_COMPCERT_VERSION_CHECK)
+    #undef JSON_HEDLEY_COMPCERT_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_COMPCERT_VERSION)
+    #define JSON_HEDLEY_COMPCERT_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_COMPCERT_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_COMPCERT_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_PELLES_VERSION)
+    #undef JSON_HEDLEY_PELLES_VERSION
+#endif
+#if defined(__POCC__)
+    #define JSON_HEDLEY_PELLES_VERSION JSON_HEDLEY_VERSION_ENCODE(__POCC__ / 100, __POCC__ % 100, 0)
+#endif
+
+#if defined(JSON_HEDLEY_PELLES_VERSION_CHECK)
+    #undef JSON_HEDLEY_PELLES_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_PELLES_VERSION)
+    #define JSON_HEDLEY_PELLES_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_PELLES_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_PELLES_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_MCST_LCC_VERSION)
+    #undef JSON_HEDLEY_MCST_LCC_VERSION
+#endif
+#if defined(__LCC__) && defined(__LCC_MINOR__)
+    #define JSON_HEDLEY_MCST_LCC_VERSION JSON_HEDLEY_VERSION_ENCODE(__LCC__ / 100, __LCC__ % 100, __LCC_MINOR__)
+#endif
+
+#if defined(JSON_HEDLEY_MCST_LCC_VERSION_CHECK)
+    #undef JSON_HEDLEY_MCST_LCC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_MCST_LCC_VERSION)
+    #define JSON_HEDLEY_MCST_LCC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_MCST_LCC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_MCST_LCC_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_VERSION)
+    #undef JSON_HEDLEY_GCC_VERSION
+#endif
+#if \
+    defined(JSON_HEDLEY_GNUC_VERSION) && \
+    !defined(__clang__) && \
+    !defined(JSON_HEDLEY_INTEL_VERSION) && \
+    !defined(JSON_HEDLEY_PGI_VERSION) && \
+    !defined(JSON_HEDLEY_ARM_VERSION) && \
+    !defined(JSON_HEDLEY_CRAY_VERSION) && \
+    !defined(JSON_HEDLEY_TI_VERSION) && \
+    !defined(JSON_HEDLEY_TI_ARMCL_VERSION) && \
+    !defined(JSON_HEDLEY_TI_CL430_VERSION) && \
+    !defined(JSON_HEDLEY_TI_CL2000_VERSION) && \
+    !defined(JSON_HEDLEY_TI_CL6X_VERSION) && \
+    !defined(JSON_HEDLEY_TI_CL7X_VERSION) && \
+    !defined(JSON_HEDLEY_TI_CLPRU_VERSION) && \
+    !defined(__COMPCERT__) && \
+    !defined(JSON_HEDLEY_MCST_LCC_VERSION)
+    #define JSON_HEDLEY_GCC_VERSION JSON_HEDLEY_GNUC_VERSION
+#endif
+
+#if defined(JSON_HEDLEY_GCC_VERSION_CHECK)
+    #undef JSON_HEDLEY_GCC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_GCC_VERSION)
+    #define JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_GCC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+    #define JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch) (0)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_ATTRIBUTE)
+    #undef JSON_HEDLEY_HAS_ATTRIBUTE
+#endif
+#if \
+  defined(__has_attribute) && \
+  ( \
+    (!defined(JSON_HEDLEY_IAR_VERSION) || JSON_HEDLEY_IAR_VERSION_CHECK(8,5,9)) \
+  )
+#  define JSON_HEDLEY_HAS_ATTRIBUTE(attribute) __has_attribute(attribute)
+#else
+#  define JSON_HEDLEY_HAS_ATTRIBUTE(attribute) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_HAS_ATTRIBUTE)
+    #undef JSON_HEDLEY_GNUC_HAS_ATTRIBUTE
+#endif
+#if defined(__has_attribute)
+    #define JSON_HEDLEY_GNUC_HAS_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_HAS_ATTRIBUTE(attribute)
+#else
+    #define JSON_HEDLEY_GNUC_HAS_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_HAS_ATTRIBUTE)
+    #undef JSON_HEDLEY_GCC_HAS_ATTRIBUTE
+#endif
+#if defined(__has_attribute)
+    #define JSON_HEDLEY_GCC_HAS_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_HAS_ATTRIBUTE(attribute)
+#else
+    #define JSON_HEDLEY_GCC_HAS_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_CPP_ATTRIBUTE)
+    #undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE
+#endif
+#if \
+    defined(__has_cpp_attribute) && \
+    defined(__cplusplus) && \
+    (!defined(JSON_HEDLEY_SUNPRO_VERSION) || JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0))
+    #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE(attribute) __has_cpp_attribute(attribute)
+#else
+    #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE(attribute) (0)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS)
+    #undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS
+#endif
+#if !defined(__cplusplus) || !defined(__has_cpp_attribute)
+    #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(ns,attribute) (0)
+#elif \
+    !defined(JSON_HEDLEY_PGI_VERSION) && \
+    !defined(JSON_HEDLEY_IAR_VERSION) && \
+    (!defined(JSON_HEDLEY_SUNPRO_VERSION) || JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0)) && \
+    (!defined(JSON_HEDLEY_MSVC_VERSION) || JSON_HEDLEY_MSVC_VERSION_CHECK(19,20,0))
+    #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(ns,attribute) JSON_HEDLEY_HAS_CPP_ATTRIBUTE(ns::attribute)
+#else
+    #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(ns,attribute) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE)
+    #undef JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE
+#endif
+#if defined(__has_cpp_attribute) && defined(__cplusplus)
+    #define JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) __has_cpp_attribute(attribute)
+#else
+    #define JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE)
+    #undef JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE
+#endif
+#if defined(__has_cpp_attribute) && defined(__cplusplus)
+    #define JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) __has_cpp_attribute(attribute)
+#else
+    #define JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_BUILTIN)
+    #undef JSON_HEDLEY_HAS_BUILTIN
+#endif
+#if defined(__has_builtin)
+    #define JSON_HEDLEY_HAS_BUILTIN(builtin) __has_builtin(builtin)
+#else
+    #define JSON_HEDLEY_HAS_BUILTIN(builtin) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_HAS_BUILTIN)
+    #undef JSON_HEDLEY_GNUC_HAS_BUILTIN
+#endif
+#if defined(__has_builtin)
+    #define JSON_HEDLEY_GNUC_HAS_BUILTIN(builtin,major,minor,patch) __has_builtin(builtin)
+#else
+    #define JSON_HEDLEY_GNUC_HAS_BUILTIN(builtin,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_HAS_BUILTIN)
+    #undef JSON_HEDLEY_GCC_HAS_BUILTIN
+#endif
+#if defined(__has_builtin)
+    #define JSON_HEDLEY_GCC_HAS_BUILTIN(builtin,major,minor,patch) __has_builtin(builtin)
+#else
+    #define JSON_HEDLEY_GCC_HAS_BUILTIN(builtin,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_FEATURE)
+    #undef JSON_HEDLEY_HAS_FEATURE
+#endif
+#if defined(__has_feature)
+    #define JSON_HEDLEY_HAS_FEATURE(feature) __has_feature(feature)
+#else
+    #define JSON_HEDLEY_HAS_FEATURE(feature) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_HAS_FEATURE)
+    #undef JSON_HEDLEY_GNUC_HAS_FEATURE
+#endif
+#if defined(__has_feature)
+    #define JSON_HEDLEY_GNUC_HAS_FEATURE(feature,major,minor,patch) __has_feature(feature)
+#else
+    #define JSON_HEDLEY_GNUC_HAS_FEATURE(feature,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_HAS_FEATURE)
+    #undef JSON_HEDLEY_GCC_HAS_FEATURE
+#endif
+#if defined(__has_feature)
+    #define JSON_HEDLEY_GCC_HAS_FEATURE(feature,major,minor,patch) __has_feature(feature)
+#else
+    #define JSON_HEDLEY_GCC_HAS_FEATURE(feature,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_EXTENSION)
+    #undef JSON_HEDLEY_HAS_EXTENSION
+#endif
+#if defined(__has_extension)
+    #define JSON_HEDLEY_HAS_EXTENSION(extension) __has_extension(extension)
+#else
+    #define JSON_HEDLEY_HAS_EXTENSION(extension) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_HAS_EXTENSION)
+    #undef JSON_HEDLEY_GNUC_HAS_EXTENSION
+#endif
+#if defined(__has_extension)
+    #define JSON_HEDLEY_GNUC_HAS_EXTENSION(extension,major,minor,patch) __has_extension(extension)
+#else
+    #define JSON_HEDLEY_GNUC_HAS_EXTENSION(extension,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_HAS_EXTENSION)
+    #undef JSON_HEDLEY_GCC_HAS_EXTENSION
+#endif
+#if defined(__has_extension)
+    #define JSON_HEDLEY_GCC_HAS_EXTENSION(extension,major,minor,patch) __has_extension(extension)
+#else
+    #define JSON_HEDLEY_GCC_HAS_EXTENSION(extension,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE)
+    #undef JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE
+#endif
+#if defined(__has_declspec_attribute)
+    #define JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE(attribute) __has_declspec_attribute(attribute)
+#else
+    #define JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE(attribute) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE)
+    #undef JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE
+#endif
+#if defined(__has_declspec_attribute)
+    #define JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) __has_declspec_attribute(attribute)
+#else
+    #define JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE)
+    #undef JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE
+#endif
+#if defined(__has_declspec_attribute)
+    #define JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) __has_declspec_attribute(attribute)
+#else
+    #define JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_HAS_WARNING)
+    #undef JSON_HEDLEY_HAS_WARNING
+#endif
+#if defined(__has_warning)
+    #define JSON_HEDLEY_HAS_WARNING(warning) __has_warning(warning)
+#else
+    #define JSON_HEDLEY_HAS_WARNING(warning) (0)
+#endif
+
+#if defined(JSON_HEDLEY_GNUC_HAS_WARNING)
+    #undef JSON_HEDLEY_GNUC_HAS_WARNING
+#endif
+#if defined(__has_warning)
+    #define JSON_HEDLEY_GNUC_HAS_WARNING(warning,major,minor,patch) __has_warning(warning)
+#else
+    #define JSON_HEDLEY_GNUC_HAS_WARNING(warning,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_GCC_HAS_WARNING)
+    #undef JSON_HEDLEY_GCC_HAS_WARNING
+#endif
+#if defined(__has_warning)
+    #define JSON_HEDLEY_GCC_HAS_WARNING(warning,major,minor,patch) __has_warning(warning)
+#else
+    #define JSON_HEDLEY_GCC_HAS_WARNING(warning,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if \
+    (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
+    defined(__clang__) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,0,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0) || \
+    JSON_HEDLEY_PGI_VERSION_CHECK(18,4,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,7,0) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(2,0,1) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,1,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,0,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_CRAY_VERSION_CHECK(5,0,0) || \
+    JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,17) || \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(8,0,0) || \
+    (JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) && defined(__C99_PRAGMA_OPERATOR))
+    #define JSON_HEDLEY_PRAGMA(value) _Pragma(#value)
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+    #define JSON_HEDLEY_PRAGMA(value) __pragma(value)
+#else
+    #define JSON_HEDLEY_PRAGMA(value)
+#endif
+
+#if defined(JSON_HEDLEY_DIAGNOSTIC_PUSH)
+    #undef JSON_HEDLEY_DIAGNOSTIC_PUSH
+#endif
+#if defined(JSON_HEDLEY_DIAGNOSTIC_POP)
+    #undef JSON_HEDLEY_DIAGNOSTIC_POP
+#endif
+#if defined(__clang__)
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push")
+    #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("clang diagnostic pop")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("warning(push)")
+    #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("warning(pop)")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,6,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push")
+    #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop")
+#elif \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH __pragma(warning(push))
+    #define JSON_HEDLEY_DIAGNOSTIC_POP __pragma(warning(pop))
+#elif JSON_HEDLEY_ARM_VERSION_CHECK(5,6,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("push")
+    #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("pop")
+#elif \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,4,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,1,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("diag_push")
+    #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("diag_pop")
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(2,90,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("warning(push)")
+    #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("warning(pop)")
+#else
+    #define JSON_HEDLEY_DIAGNOSTIC_PUSH
+    #define JSON_HEDLEY_DIAGNOSTIC_POP
+#endif
+
+/* JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_ is for
+   HEDLEY INTERNAL USE ONLY.  API subject to change without notice. */
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_)
+    #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_
+#endif
+#if defined(__cplusplus)
+#  if JSON_HEDLEY_HAS_WARNING("-Wc++98-compat")
+#    if JSON_HEDLEY_HAS_WARNING("-Wc++17-extensions")
+#      if JSON_HEDLEY_HAS_WARNING("-Wc++1z-extensions")
+#        define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(xpr) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    _Pragma("clang diagnostic ignored \"-Wc++98-compat\"") \
+    _Pragma("clang diagnostic ignored \"-Wc++17-extensions\"") \
+    _Pragma("clang diagnostic ignored \"-Wc++1z-extensions\"") \
+    xpr \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#      else
+#        define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(xpr) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    _Pragma("clang diagnostic ignored \"-Wc++98-compat\"") \
+    _Pragma("clang diagnostic ignored \"-Wc++17-extensions\"") \
+    xpr \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#      endif
+#    else
+#      define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(xpr) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    _Pragma("clang diagnostic ignored \"-Wc++98-compat\"") \
+    xpr \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#    endif
+#  endif
+#endif
+#if !defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(x) x
+#endif
+
+#if defined(JSON_HEDLEY_CONST_CAST)
+    #undef JSON_HEDLEY_CONST_CAST
+#endif
+#if defined(__cplusplus)
+#  define JSON_HEDLEY_CONST_CAST(T, expr) (const_cast<T>(expr))
+#elif \
+  JSON_HEDLEY_HAS_WARNING("-Wcast-qual") || \
+  JSON_HEDLEY_GCC_VERSION_CHECK(4,6,0) || \
+  JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+#  define JSON_HEDLEY_CONST_CAST(T, expr) (__extension__ ({ \
+        JSON_HEDLEY_DIAGNOSTIC_PUSH \
+        JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL \
+        ((T) (expr)); \
+        JSON_HEDLEY_DIAGNOSTIC_POP \
+    }))
+#else
+#  define JSON_HEDLEY_CONST_CAST(T, expr) ((T) (expr))
+#endif
+
+#if defined(JSON_HEDLEY_REINTERPRET_CAST)
+    #undef JSON_HEDLEY_REINTERPRET_CAST
+#endif
+#if defined(__cplusplus)
+    #define JSON_HEDLEY_REINTERPRET_CAST(T, expr) (reinterpret_cast<T>(expr))
+#else
+    #define JSON_HEDLEY_REINTERPRET_CAST(T, expr) ((T) (expr))
+#endif
+
+#if defined(JSON_HEDLEY_STATIC_CAST)
+    #undef JSON_HEDLEY_STATIC_CAST
+#endif
+#if defined(__cplusplus)
+    #define JSON_HEDLEY_STATIC_CAST(T, expr) (static_cast<T>(expr))
+#else
+    #define JSON_HEDLEY_STATIC_CAST(T, expr) ((T) (expr))
+#endif
+
+#if defined(JSON_HEDLEY_CPP_CAST)
+    #undef JSON_HEDLEY_CPP_CAST
+#endif
+#if defined(__cplusplus)
+#  if JSON_HEDLEY_HAS_WARNING("-Wold-style-cast")
+#    define JSON_HEDLEY_CPP_CAST(T, expr) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    _Pragma("clang diagnostic ignored \"-Wold-style-cast\"") \
+    ((T) (expr)) \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#  elif JSON_HEDLEY_IAR_VERSION_CHECK(8,3,0)
+#    define JSON_HEDLEY_CPP_CAST(T, expr) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    _Pragma("diag_suppress=Pe137") \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#  else
+#    define JSON_HEDLEY_CPP_CAST(T, expr) ((T) (expr))
+#  endif
+#else
+#  define JSON_HEDLEY_CPP_CAST(T, expr) (expr)
+#endif
+
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED)
+    #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wdeprecated-declarations")
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("warning(disable:1478 1786)")
+#elif JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED __pragma(warning(disable:1478 1786))
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(20,7,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress 1215,1216,1444,1445")
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress 1215,1444")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,3,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED __pragma(warning(disable:4996))
+#elif JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress 1215,1444")
+#elif \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress 1291,1718")
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,13,0) && !defined(__cplusplus)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("error_messages(off,E_DEPRECATED_ATT,E_DEPRECATED_ATT_MESS)")
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,13,0) && defined(__cplusplus)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("error_messages(off,symdeprecated,symdeprecated2)")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress=Pe1444,Pe1215")
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(2,90,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("warn(disable:2241)")
+#else
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED
+#endif
+
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS)
+    #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-pragmas")
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("clang diagnostic ignored \"-Wunknown-pragmas\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("warning(disable:161)")
+#elif JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS __pragma(warning(disable:161))
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress 1675")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,3,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("GCC diagnostic ignored \"-Wunknown-pragmas\"")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS __pragma(warning(disable:4068))
+#elif \
+    JSON_HEDLEY_TI_VERSION_CHECK(16,9,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,0,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,3,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress 163")
+#elif JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress 163")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress=Pe161")
+#elif JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress 161")
+#else
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS
+#endif
+
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES)
+    #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-attributes")
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("clang diagnostic ignored \"-Wunknown-attributes\"")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,6,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(17,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("warning(disable:1292)")
+#elif JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES __pragma(warning(disable:1292))
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(19,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES __pragma(warning(disable:5030))
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(20,7,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress 1097,1098")
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress 1097")
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,14,0) && defined(__cplusplus)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("error_messages(off,attrskipunsup)")
+#elif \
+    JSON_HEDLEY_TI_VERSION_CHECK(18,1,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,3,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress 1173")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress=Pe1097")
+#elif JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress 1097")
+#else
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES
+#endif
+
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL)
+    #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wcast-qual")
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL _Pragma("clang diagnostic ignored \"-Wcast-qual\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL _Pragma("warning(disable:2203 2331)")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(3,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL _Pragma("GCC diagnostic ignored \"-Wcast-qual\"")
+#else
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL
+#endif
+
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION)
+    #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunused-function")
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION _Pragma("clang diagnostic ignored \"-Wunused-function\"")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(3,4,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION _Pragma("GCC diagnostic ignored \"-Wunused-function\"")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(1,0,0)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION __pragma(warning(disable:4505))
+#elif JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION _Pragma("diag_suppress 3142")
+#else
+    #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION
+#endif
+
+#if defined(JSON_HEDLEY_DEPRECATED)
+    #undef JSON_HEDLEY_DEPRECATED
+#endif
+#if defined(JSON_HEDLEY_DEPRECATED_FOR)
+    #undef JSON_HEDLEY_DEPRECATED_FOR
+#endif
+#if \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(14,0,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_DEPRECATED(since) __declspec(deprecated("Since " # since))
+    #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __declspec(deprecated("Since " #since "; use " #replacement))
+#elif \
+    (JSON_HEDLEY_HAS_EXTENSION(attribute_deprecated_with_message) && !defined(JSON_HEDLEY_IAR_VERSION)) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(4,5,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(5,6,0) || \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,13,0) || \
+    JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(18,1,0) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(18,1,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,3,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,3,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_DEPRECATED(since) __attribute__((__deprecated__("Since " #since)))
+    #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __attribute__((__deprecated__("Since " #since "; use " #replacement)))
+#elif defined(__cplusplus) && (__cplusplus >= 201402L)
+    #define JSON_HEDLEY_DEPRECATED(since) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[deprecated("Since " #since)]])
+    #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[deprecated("Since " #since "; use " #replacement)]])
+#elif \
+    JSON_HEDLEY_HAS_ATTRIBUTE(deprecated) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10) || \
+    JSON_HEDLEY_IAR_VERSION_CHECK(8,10,0)
+    #define JSON_HEDLEY_DEPRECATED(since) __attribute__((__deprecated__))
+    #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __attribute__((__deprecated__))
+#elif \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0) || \
+    JSON_HEDLEY_PELLES_VERSION_CHECK(6,50,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_DEPRECATED(since) __declspec(deprecated)
+    #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __declspec(deprecated)
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+    #define JSON_HEDLEY_DEPRECATED(since) _Pragma("deprecated")
+    #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) _Pragma("deprecated")
+#else
+    #define JSON_HEDLEY_DEPRECATED(since)
+    #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement)
+#endif
+
+#if defined(JSON_HEDLEY_UNAVAILABLE)
+    #undef JSON_HEDLEY_UNAVAILABLE
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(warning) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(4,3,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_UNAVAILABLE(available_since) __attribute__((__warning__("Not available until " #available_since)))
+#else
+    #define JSON_HEDLEY_UNAVAILABLE(available_since)
+#endif
+
+#if defined(JSON_HEDLEY_WARN_UNUSED_RESULT)
+    #undef JSON_HEDLEY_WARN_UNUSED_RESULT
+#endif
+#if defined(JSON_HEDLEY_WARN_UNUSED_RESULT_MSG)
+    #undef JSON_HEDLEY_WARN_UNUSED_RESULT_MSG
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(warn_unused_result) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,4,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0) && defined(__cplusplus)) || \
+    JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) __attribute__((__warn_unused_result__))
+#elif (JSON_HEDLEY_HAS_CPP_ATTRIBUTE(nodiscard) >= 201907L)
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard]])
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard(msg)]])
+#elif JSON_HEDLEY_HAS_CPP_ATTRIBUTE(nodiscard)
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard]])
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard]])
+#elif defined(_Check_return_) /* SAL */
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT _Check_return_
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) _Check_return_
+#else
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT
+    #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg)
+#endif
+
+#if defined(JSON_HEDLEY_SENTINEL)
+    #undef JSON_HEDLEY_SENTINEL
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(sentinel) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(4,0,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(5,4,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_SENTINEL(position) __attribute__((__sentinel__(position)))
+#else
+    #define JSON_HEDLEY_SENTINEL(position)
+#endif
+
+#if defined(JSON_HEDLEY_NO_RETURN)
+    #undef JSON_HEDLEY_NO_RETURN
+#endif
+#if JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+    #define JSON_HEDLEY_NO_RETURN __noreturn
+#elif \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_NO_RETURN __attribute__((__noreturn__))
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+    #define JSON_HEDLEY_NO_RETURN _Noreturn
+#elif defined(__cplusplus) && (__cplusplus >= 201103L)
+    #define JSON_HEDLEY_NO_RETURN JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[noreturn]])
+#elif \
+    JSON_HEDLEY_HAS_ATTRIBUTE(noreturn) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,2,0) || \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_IAR_VERSION_CHECK(8,10,0)
+    #define JSON_HEDLEY_NO_RETURN __attribute__((__noreturn__))
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+    #define JSON_HEDLEY_NO_RETURN _Pragma("does_not_return")
+#elif \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_NO_RETURN __declspec(noreturn)
+#elif JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,0,0) && defined(__cplusplus)
+    #define JSON_HEDLEY_NO_RETURN _Pragma("FUNC_NEVER_RETURNS;")
+#elif JSON_HEDLEY_COMPCERT_VERSION_CHECK(3,2,0)
+    #define JSON_HEDLEY_NO_RETURN __attribute((noreturn))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(9,0,0)
+    #define JSON_HEDLEY_NO_RETURN __declspec(noreturn)
+#else
+    #define JSON_HEDLEY_NO_RETURN
+#endif
+
+#if defined(JSON_HEDLEY_NO_ESCAPE)
+    #undef JSON_HEDLEY_NO_ESCAPE
+#endif
+#if JSON_HEDLEY_HAS_ATTRIBUTE(noescape)
+    #define JSON_HEDLEY_NO_ESCAPE __attribute__((__noescape__))
+#else
+    #define JSON_HEDLEY_NO_ESCAPE
+#endif
+
+#if defined(JSON_HEDLEY_UNREACHABLE)
+    #undef JSON_HEDLEY_UNREACHABLE
+#endif
+#if defined(JSON_HEDLEY_UNREACHABLE_RETURN)
+    #undef JSON_HEDLEY_UNREACHABLE_RETURN
+#endif
+#if defined(JSON_HEDLEY_ASSUME)
+    #undef JSON_HEDLEY_ASSUME
+#endif
+#if \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_ASSUME(expr) __assume(expr)
+#elif JSON_HEDLEY_HAS_BUILTIN(__builtin_assume)
+    #define JSON_HEDLEY_ASSUME(expr) __builtin_assume(expr)
+#elif \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(4,0,0)
+    #if defined(__cplusplus)
+        #define JSON_HEDLEY_ASSUME(expr) std::_nassert(expr)
+    #else
+        #define JSON_HEDLEY_ASSUME(expr) _nassert(expr)
+    #endif
+#endif
+#if \
+    (JSON_HEDLEY_HAS_BUILTIN(__builtin_unreachable) && (!defined(JSON_HEDLEY_ARM_VERSION))) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(4,5,0) || \
+    JSON_HEDLEY_PGI_VERSION_CHECK(18,10,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(13,1,5) || \
+    JSON_HEDLEY_CRAY_VERSION_CHECK(10,0,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_UNREACHABLE() __builtin_unreachable()
+#elif defined(JSON_HEDLEY_ASSUME)
+    #define JSON_HEDLEY_UNREACHABLE() JSON_HEDLEY_ASSUME(0)
+#endif
+#if !defined(JSON_HEDLEY_ASSUME)
+    #if defined(JSON_HEDLEY_UNREACHABLE)
+        #define JSON_HEDLEY_ASSUME(expr) JSON_HEDLEY_STATIC_CAST(void, ((expr) ? 1 : (JSON_HEDLEY_UNREACHABLE(), 1)))
+    #else
+        #define JSON_HEDLEY_ASSUME(expr) JSON_HEDLEY_STATIC_CAST(void, expr)
+    #endif
+#endif
+#if defined(JSON_HEDLEY_UNREACHABLE)
+    #if  \
+        JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,0) || \
+        JSON_HEDLEY_TI_CL6X_VERSION_CHECK(4,0,0)
+        #define JSON_HEDLEY_UNREACHABLE_RETURN(value) return (JSON_HEDLEY_STATIC_CAST(void, JSON_HEDLEY_ASSUME(0)), (value))
+    #else
+        #define JSON_HEDLEY_UNREACHABLE_RETURN(value) JSON_HEDLEY_UNREACHABLE()
+    #endif
+#else
+    #define JSON_HEDLEY_UNREACHABLE_RETURN(value) return (value)
+#endif
+#if !defined(JSON_HEDLEY_UNREACHABLE)
+    #define JSON_HEDLEY_UNREACHABLE() JSON_HEDLEY_ASSUME(0)
+#endif
+
+JSON_HEDLEY_DIAGNOSTIC_PUSH
+#if JSON_HEDLEY_HAS_WARNING("-Wpedantic")
+    #pragma clang diagnostic ignored "-Wpedantic"
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wc++98-compat-pedantic") && defined(__cplusplus)
+    #pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
+#endif
+#if JSON_HEDLEY_GCC_HAS_WARNING("-Wvariadic-macros",4,0,0)
+    #if defined(__clang__)
+        #pragma clang diagnostic ignored "-Wvariadic-macros"
+    #elif defined(JSON_HEDLEY_GCC_VERSION)
+        #pragma GCC diagnostic ignored "-Wvariadic-macros"
+    #endif
+#endif
+#if defined(JSON_HEDLEY_NON_NULL)
+    #undef JSON_HEDLEY_NON_NULL
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(nonnull) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,3,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0)
+    #define JSON_HEDLEY_NON_NULL(...) __attribute__((__nonnull__(__VA_ARGS__)))
+#else
+    #define JSON_HEDLEY_NON_NULL(...)
+#endif
+JSON_HEDLEY_DIAGNOSTIC_POP
+
+#if defined(JSON_HEDLEY_PRINTF_FORMAT)
+    #undef JSON_HEDLEY_PRINTF_FORMAT
+#endif
+#if defined(__MINGW32__) && JSON_HEDLEY_GCC_HAS_ATTRIBUTE(format,4,4,0) && !defined(__USE_MINGW_ANSI_STDIO)
+    #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __attribute__((__format__(ms_printf, string_idx, first_to_check)))
+#elif defined(__MINGW32__) && JSON_HEDLEY_GCC_HAS_ATTRIBUTE(format,4,4,0) && defined(__USE_MINGW_ANSI_STDIO)
+    #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __attribute__((__format__(gnu_printf, string_idx, first_to_check)))
+#elif \
+    JSON_HEDLEY_HAS_ATTRIBUTE(format) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(5,6,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __attribute__((__format__(__printf__, string_idx, first_to_check)))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(6,0,0)
+    #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __declspec(vaformat(printf,string_idx,first_to_check))
+#else
+    #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check)
+#endif
+
+#if defined(JSON_HEDLEY_CONSTEXPR)
+    #undef JSON_HEDLEY_CONSTEXPR
+#endif
+#if defined(__cplusplus)
+    #if __cplusplus >= 201103L
+        #define JSON_HEDLEY_CONSTEXPR JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(constexpr)
+    #endif
+#endif
+#if !defined(JSON_HEDLEY_CONSTEXPR)
+    #define JSON_HEDLEY_CONSTEXPR
+#endif
+
+#if defined(JSON_HEDLEY_PREDICT)
+    #undef JSON_HEDLEY_PREDICT
+#endif
+#if defined(JSON_HEDLEY_LIKELY)
+    #undef JSON_HEDLEY_LIKELY
+#endif
+#if defined(JSON_HEDLEY_UNLIKELY)
+    #undef JSON_HEDLEY_UNLIKELY
+#endif
+#if defined(JSON_HEDLEY_UNPREDICTABLE)
+    #undef JSON_HEDLEY_UNPREDICTABLE
+#endif
+#if JSON_HEDLEY_HAS_BUILTIN(__builtin_unpredictable)
+    #define JSON_HEDLEY_UNPREDICTABLE(expr) __builtin_unpredictable((expr))
+#endif
+#if \
+  (JSON_HEDLEY_HAS_BUILTIN(__builtin_expect_with_probability) && !defined(JSON_HEDLEY_PGI_VERSION)) || \
+  JSON_HEDLEY_GCC_VERSION_CHECK(9,0,0) || \
+  JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+#  define JSON_HEDLEY_PREDICT(expr, value, probability) __builtin_expect_with_probability(  (expr), (value), (probability))
+#  define JSON_HEDLEY_PREDICT_TRUE(expr, probability)   __builtin_expect_with_probability(!!(expr),    1   , (probability))
+#  define JSON_HEDLEY_PREDICT_FALSE(expr, probability)  __builtin_expect_with_probability(!!(expr),    0   , (probability))
+#  define JSON_HEDLEY_LIKELY(expr)                      __builtin_expect                 (!!(expr),    1                  )
+#  define JSON_HEDLEY_UNLIKELY(expr)                    __builtin_expect                 (!!(expr),    0                  )
+#elif \
+  (JSON_HEDLEY_HAS_BUILTIN(__builtin_expect) && !defined(JSON_HEDLEY_INTEL_CL_VERSION)) || \
+  JSON_HEDLEY_GCC_VERSION_CHECK(3,0,0) || \
+  JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+  (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0) && defined(__cplusplus)) || \
+  JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+  JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+  JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+  JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,7,0) || \
+  JSON_HEDLEY_TI_CL430_VERSION_CHECK(3,1,0) || \
+  JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,1,0) || \
+  JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,1,0) || \
+  JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+  JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+  JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,27) || \
+  JSON_HEDLEY_CRAY_VERSION_CHECK(8,1,0) || \
+  JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+#  define JSON_HEDLEY_PREDICT(expr, expected, probability) \
+    (((probability) >= 0.9) ? __builtin_expect((expr), (expected)) : (JSON_HEDLEY_STATIC_CAST(void, expected), (expr)))
+#  define JSON_HEDLEY_PREDICT_TRUE(expr, probability) \
+    (__extension__ ({ \
+        double hedley_probability_ = (probability); \
+        ((hedley_probability_ >= 0.9) ? __builtin_expect(!!(expr), 1) : ((hedley_probability_ <= 0.1) ? __builtin_expect(!!(expr), 0) : !!(expr))); \
+    }))
+#  define JSON_HEDLEY_PREDICT_FALSE(expr, probability) \
+    (__extension__ ({ \
+        double hedley_probability_ = (probability); \
+        ((hedley_probability_ >= 0.9) ? __builtin_expect(!!(expr), 0) : ((hedley_probability_ <= 0.1) ? __builtin_expect(!!(expr), 1) : !!(expr))); \
+    }))
+#  define JSON_HEDLEY_LIKELY(expr)   __builtin_expect(!!(expr), 1)
+#  define JSON_HEDLEY_UNLIKELY(expr) __builtin_expect(!!(expr), 0)
+#else
+#  define JSON_HEDLEY_PREDICT(expr, expected, probability) (JSON_HEDLEY_STATIC_CAST(void, expected), (expr))
+#  define JSON_HEDLEY_PREDICT_TRUE(expr, probability) (!!(expr))
+#  define JSON_HEDLEY_PREDICT_FALSE(expr, probability) (!!(expr))
+#  define JSON_HEDLEY_LIKELY(expr) (!!(expr))
+#  define JSON_HEDLEY_UNLIKELY(expr) (!!(expr))
+#endif
+#if !defined(JSON_HEDLEY_UNPREDICTABLE)
+    #define JSON_HEDLEY_UNPREDICTABLE(expr) JSON_HEDLEY_PREDICT(expr, 1, 0.5)
+#endif
+
+#if defined(JSON_HEDLEY_MALLOC)
+    #undef JSON_HEDLEY_MALLOC
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(malloc) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(12,1,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_MALLOC __attribute__((__malloc__))
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+    #define JSON_HEDLEY_MALLOC _Pragma("returns_new_memory")
+#elif \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(14,0,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_MALLOC __declspec(restrict)
+#else
+    #define JSON_HEDLEY_MALLOC
+#endif
+
+#if defined(JSON_HEDLEY_PURE)
+    #undef JSON_HEDLEY_PURE
+#endif
+#if \
+  JSON_HEDLEY_HAS_ATTRIBUTE(pure) || \
+  JSON_HEDLEY_GCC_VERSION_CHECK(2,96,0) || \
+  JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+  JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+  JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+  JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+  JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+  (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+  (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+  (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+  (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+  JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+  JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+  JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0) || \
+  JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+#  define JSON_HEDLEY_PURE __attribute__((__pure__))
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+#  define JSON_HEDLEY_PURE _Pragma("does_not_write_global_data")
+#elif defined(__cplusplus) && \
+    ( \
+      JSON_HEDLEY_TI_CL430_VERSION_CHECK(2,0,1) || \
+      JSON_HEDLEY_TI_CL6X_VERSION_CHECK(4,0,0) || \
+      JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) \
+    )
+#  define JSON_HEDLEY_PURE _Pragma("FUNC_IS_PURE;")
+#else
+#  define JSON_HEDLEY_PURE
+#endif
+
+#if defined(JSON_HEDLEY_CONST)
+    #undef JSON_HEDLEY_CONST
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(const) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(2,5,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_CONST __attribute__((__const__))
+#elif \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+    #define JSON_HEDLEY_CONST _Pragma("no_side_effect")
+#else
+    #define JSON_HEDLEY_CONST JSON_HEDLEY_PURE
+#endif
+
+#if defined(JSON_HEDLEY_RESTRICT)
+    #undef JSON_HEDLEY_RESTRICT
+#endif
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && !defined(__cplusplus)
+    #define JSON_HEDLEY_RESTRICT restrict
+#elif \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(14,0,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+    JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,4) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,1,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,14,0) && defined(__cplusplus)) || \
+    JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0) || \
+    defined(__clang__) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_RESTRICT __restrict
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,3,0) && !defined(__cplusplus)
+    #define JSON_HEDLEY_RESTRICT _Restrict
+#else
+    #define JSON_HEDLEY_RESTRICT
+#endif
+
+#if defined(JSON_HEDLEY_INLINE)
+    #undef JSON_HEDLEY_INLINE
+#endif
+#if \
+    (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
+    (defined(__cplusplus) && (__cplusplus >= 199711L))
+    #define JSON_HEDLEY_INLINE inline
+#elif \
+    defined(JSON_HEDLEY_GCC_VERSION) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(6,2,0)
+    #define JSON_HEDLEY_INLINE __inline__
+#elif \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(12,0,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,1,0) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(3,1,0) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,0,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_INLINE __inline
+#else
+    #define JSON_HEDLEY_INLINE
+#endif
+
+#if defined(JSON_HEDLEY_ALWAYS_INLINE)
+    #undef JSON_HEDLEY_ALWAYS_INLINE
+#endif
+#if \
+  JSON_HEDLEY_HAS_ATTRIBUTE(always_inline) || \
+  JSON_HEDLEY_GCC_VERSION_CHECK(4,0,0) || \
+  JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+  JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+  JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+  JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+  JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+  (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+  (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+  (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+  (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+  JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+  JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+  JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+  JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10) || \
+  JSON_HEDLEY_IAR_VERSION_CHECK(8,10,0)
+#  define JSON_HEDLEY_ALWAYS_INLINE __attribute__((__always_inline__)) JSON_HEDLEY_INLINE
+#elif \
+  JSON_HEDLEY_MSVC_VERSION_CHECK(12,0,0) || \
+  JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+#  define JSON_HEDLEY_ALWAYS_INLINE __forceinline
+#elif defined(__cplusplus) && \
+    ( \
+      JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+      JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+      JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+      JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,1,0) || \
+      JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+      JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) \
+    )
+#  define JSON_HEDLEY_ALWAYS_INLINE _Pragma("FUNC_ALWAYS_INLINE;")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+#  define JSON_HEDLEY_ALWAYS_INLINE _Pragma("inline=forced")
+#else
+#  define JSON_HEDLEY_ALWAYS_INLINE JSON_HEDLEY_INLINE
+#endif
+
+#if defined(JSON_HEDLEY_NEVER_INLINE)
+    #undef JSON_HEDLEY_NEVER_INLINE
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(noinline) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(4,0,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+    JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+    (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+    (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+    (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+    (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+    JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+    JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10) || \
+    JSON_HEDLEY_IAR_VERSION_CHECK(8,10,0)
+    #define JSON_HEDLEY_NEVER_INLINE __attribute__((__noinline__))
+#elif \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_NEVER_INLINE __declspec(noinline)
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(10,2,0)
+    #define JSON_HEDLEY_NEVER_INLINE _Pragma("noinline")
+#elif JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,0,0) && defined(__cplusplus)
+    #define JSON_HEDLEY_NEVER_INLINE _Pragma("FUNC_CANNOT_INLINE;")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+    #define JSON_HEDLEY_NEVER_INLINE _Pragma("inline=never")
+#elif JSON_HEDLEY_COMPCERT_VERSION_CHECK(3,2,0)
+    #define JSON_HEDLEY_NEVER_INLINE __attribute((noinline))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(9,0,0)
+    #define JSON_HEDLEY_NEVER_INLINE __declspec(noinline)
+#else
+    #define JSON_HEDLEY_NEVER_INLINE
+#endif
+
+#if defined(JSON_HEDLEY_PRIVATE)
+    #undef JSON_HEDLEY_PRIVATE
+#endif
+#if defined(JSON_HEDLEY_PUBLIC)
+    #undef JSON_HEDLEY_PUBLIC
+#endif
+#if defined(JSON_HEDLEY_IMPORT)
+    #undef JSON_HEDLEY_IMPORT
+#endif
+#if defined(_WIN32) || defined(__CYGWIN__)
+#  define JSON_HEDLEY_PRIVATE
+#  define JSON_HEDLEY_PUBLIC   __declspec(dllexport)
+#  define JSON_HEDLEY_IMPORT   __declspec(dllimport)
+#else
+#  if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(visibility) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,3,0) || \
+    JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(13,1,0) || \
+    ( \
+      defined(__TI_EABI__) && \
+      ( \
+        (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+        JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) \
+      ) \
+    ) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+#    define JSON_HEDLEY_PRIVATE __attribute__((__visibility__("hidden")))
+#    define JSON_HEDLEY_PUBLIC  __attribute__((__visibility__("default")))
+#  else
+#    define JSON_HEDLEY_PRIVATE
+#    define JSON_HEDLEY_PUBLIC
+#  endif
+#  define JSON_HEDLEY_IMPORT    extern
+#endif
+
+#if defined(JSON_HEDLEY_NO_THROW)
+    #undef JSON_HEDLEY_NO_THROW
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(nothrow) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,3,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_NO_THROW __attribute__((__nothrow__))
+#elif \
+    JSON_HEDLEY_MSVC_VERSION_CHECK(13,1,0) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0)
+    #define JSON_HEDLEY_NO_THROW __declspec(nothrow)
+#else
+    #define JSON_HEDLEY_NO_THROW
+#endif
+
+#if defined(JSON_HEDLEY_FALL_THROUGH)
+    #undef JSON_HEDLEY_FALL_THROUGH
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(fallthrough) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(7,0,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_FALL_THROUGH __attribute__((__fallthrough__))
+#elif JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(clang,fallthrough)
+    #define JSON_HEDLEY_FALL_THROUGH JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[clang::fallthrough]])
+#elif JSON_HEDLEY_HAS_CPP_ATTRIBUTE(fallthrough)
+    #define JSON_HEDLEY_FALL_THROUGH JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[fallthrough]])
+#elif defined(__fallthrough) /* SAL */
+    #define JSON_HEDLEY_FALL_THROUGH __fallthrough
+#else
+    #define JSON_HEDLEY_FALL_THROUGH
+#endif
+
+#if defined(JSON_HEDLEY_RETURNS_NON_NULL)
+    #undef JSON_HEDLEY_RETURNS_NON_NULL
+#endif
+#if \
+    JSON_HEDLEY_HAS_ATTRIBUTE(returns_nonnull) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_RETURNS_NON_NULL __attribute__((__returns_nonnull__))
+#elif defined(_Ret_notnull_) /* SAL */
+    #define JSON_HEDLEY_RETURNS_NON_NULL _Ret_notnull_
+#else
+    #define JSON_HEDLEY_RETURNS_NON_NULL
+#endif
+
+#if defined(JSON_HEDLEY_ARRAY_PARAM)
+    #undef JSON_HEDLEY_ARRAY_PARAM
+#endif
+#if \
+    defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
+    !defined(__STDC_NO_VLA__) && \
+    !defined(__cplusplus) && \
+    !defined(JSON_HEDLEY_PGI_VERSION) && \
+    !defined(JSON_HEDLEY_TINYC_VERSION)
+    #define JSON_HEDLEY_ARRAY_PARAM(name) (name)
+#else
+    #define JSON_HEDLEY_ARRAY_PARAM(name)
+#endif
+
+#if defined(JSON_HEDLEY_IS_CONSTANT)
+    #undef JSON_HEDLEY_IS_CONSTANT
+#endif
+#if defined(JSON_HEDLEY_REQUIRE_CONSTEXPR)
+    #undef JSON_HEDLEY_REQUIRE_CONSTEXPR
+#endif
+/* JSON_HEDLEY_IS_CONSTEXPR_ is for
+   HEDLEY INTERNAL USE ONLY.  API subject to change without notice. */
+#if defined(JSON_HEDLEY_IS_CONSTEXPR_)
+    #undef JSON_HEDLEY_IS_CONSTEXPR_
+#endif
+#if \
+    JSON_HEDLEY_HAS_BUILTIN(__builtin_constant_p) || \
+    JSON_HEDLEY_GCC_VERSION_CHECK(3,4,0) || \
+    JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+    JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,19) || \
+    JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+    JSON_HEDLEY_IBM_VERSION_CHECK(13,1,0) || \
+    JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,1,0) || \
+    (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0) && !defined(__cplusplus)) || \
+    JSON_HEDLEY_CRAY_VERSION_CHECK(8,1,0) || \
+    JSON_HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+    #define JSON_HEDLEY_IS_CONSTANT(expr) __builtin_constant_p(expr)
+#endif
+#if !defined(__cplusplus)
+#  if \
+       JSON_HEDLEY_HAS_BUILTIN(__builtin_types_compatible_p) || \
+       JSON_HEDLEY_GCC_VERSION_CHECK(3,4,0) || \
+       JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+       JSON_HEDLEY_IBM_VERSION_CHECK(13,1,0) || \
+       JSON_HEDLEY_CRAY_VERSION_CHECK(8,1,0) || \
+       JSON_HEDLEY_ARM_VERSION_CHECK(5,4,0) || \
+       JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,24)
+#if defined(__INTPTR_TYPE__)
+    #define JSON_HEDLEY_IS_CONSTEXPR_(expr) __builtin_types_compatible_p(__typeof__((1 ? (void*) ((__INTPTR_TYPE__) ((expr) * 0)) : (int*) 0)), int*)
+#else
+    #include <stdint.h>
+    #define JSON_HEDLEY_IS_CONSTEXPR_(expr) __builtin_types_compatible_p(__typeof__((1 ? (void*) ((intptr_t) ((expr) * 0)) : (int*) 0)), int*)
+#endif
+#  elif \
+       ( \
+          defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) && \
+          !defined(JSON_HEDLEY_SUNPRO_VERSION) && \
+          !defined(JSON_HEDLEY_PGI_VERSION) && \
+          !defined(JSON_HEDLEY_IAR_VERSION)) || \
+       (JSON_HEDLEY_HAS_EXTENSION(c_generic_selections) && !defined(JSON_HEDLEY_IAR_VERSION)) || \
+       JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0) || \
+       JSON_HEDLEY_INTEL_VERSION_CHECK(17,0,0) || \
+       JSON_HEDLEY_IBM_VERSION_CHECK(12,1,0) || \
+       JSON_HEDLEY_ARM_VERSION_CHECK(5,3,0)
+#if defined(__INTPTR_TYPE__)
+    #define JSON_HEDLEY_IS_CONSTEXPR_(expr) _Generic((1 ? (void*) ((__INTPTR_TYPE__) ((expr) * 0)) : (int*) 0), int*: 1, void*: 0)
+#else
+    #include <stdint.h>
+    #define JSON_HEDLEY_IS_CONSTEXPR_(expr) _Generic((1 ? (void*) ((intptr_t) * 0) : (int*) 0), int*: 1, void*: 0)
+#endif
+#  elif \
+       defined(JSON_HEDLEY_GCC_VERSION) || \
+       defined(JSON_HEDLEY_INTEL_VERSION) || \
+       defined(JSON_HEDLEY_TINYC_VERSION) || \
+       defined(JSON_HEDLEY_TI_ARMCL_VERSION) || \
+       JSON_HEDLEY_TI_CL430_VERSION_CHECK(18,12,0) || \
+       defined(JSON_HEDLEY_TI_CL2000_VERSION) || \
+       defined(JSON_HEDLEY_TI_CL6X_VERSION) || \
+       defined(JSON_HEDLEY_TI_CL7X_VERSION) || \
+       defined(JSON_HEDLEY_TI_CLPRU_VERSION) || \
+       defined(__clang__)
+#    define JSON_HEDLEY_IS_CONSTEXPR_(expr) ( \
+        sizeof(void) != \
+        sizeof(*( \
+                  1 ? \
+                  ((void*) ((expr) * 0L) ) : \
+((struct { char v[sizeof(void) * 2]; } *) 1) \
+                ) \
+              ) \
+                                            )
+#  endif
+#endif
+#if defined(JSON_HEDLEY_IS_CONSTEXPR_)
+    #if !defined(JSON_HEDLEY_IS_CONSTANT)
+        #define JSON_HEDLEY_IS_CONSTANT(expr) JSON_HEDLEY_IS_CONSTEXPR_(expr)
+    #endif
+    #define JSON_HEDLEY_REQUIRE_CONSTEXPR(expr) (JSON_HEDLEY_IS_CONSTEXPR_(expr) ? (expr) : (-1))
+#else
+    #if !defined(JSON_HEDLEY_IS_CONSTANT)
+        #define JSON_HEDLEY_IS_CONSTANT(expr) (0)
+    #endif
+    #define JSON_HEDLEY_REQUIRE_CONSTEXPR(expr) (expr)
+#endif
+
+#if defined(JSON_HEDLEY_BEGIN_C_DECLS)
+    #undef JSON_HEDLEY_BEGIN_C_DECLS
+#endif
+#if defined(JSON_HEDLEY_END_C_DECLS)
+    #undef JSON_HEDLEY_END_C_DECLS
+#endif
+#if defined(JSON_HEDLEY_C_DECL)
+    #undef JSON_HEDLEY_C_DECL
+#endif
+#if defined(__cplusplus)
+    #define JSON_HEDLEY_BEGIN_C_DECLS extern "C" {
+    #define JSON_HEDLEY_END_C_DECLS }
+    #define JSON_HEDLEY_C_DECL extern "C"
+#else
+    #define JSON_HEDLEY_BEGIN_C_DECLS
+    #define JSON_HEDLEY_END_C_DECLS
+    #define JSON_HEDLEY_C_DECL
+#endif
+
+#if defined(JSON_HEDLEY_STATIC_ASSERT)
+    #undef JSON_HEDLEY_STATIC_ASSERT
+#endif
+#if \
+  !defined(__cplusplus) && ( \
+      (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)) || \
+      (JSON_HEDLEY_HAS_FEATURE(c_static_assert) && !defined(JSON_HEDLEY_INTEL_CL_VERSION)) || \
+      JSON_HEDLEY_GCC_VERSION_CHECK(6,0,0) || \
+      JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+      defined(_Static_assert) \
+    )
+#  define JSON_HEDLEY_STATIC_ASSERT(expr, message) _Static_assert(expr, message)
+#elif \
+  (defined(__cplusplus) && (__cplusplus >= 201103L)) || \
+  JSON_HEDLEY_MSVC_VERSION_CHECK(16,0,0) || \
+  JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+#  define JSON_HEDLEY_STATIC_ASSERT(expr, message) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(static_assert(expr, message))
+#else
+#  define JSON_HEDLEY_STATIC_ASSERT(expr, message)
+#endif
+
+#if defined(JSON_HEDLEY_NULL)
+    #undef JSON_HEDLEY_NULL
+#endif
+#if defined(__cplusplus)
+    #if __cplusplus >= 201103L
+        #define JSON_HEDLEY_NULL JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(nullptr)
+    #elif defined(NULL)
+        #define JSON_HEDLEY_NULL NULL
+    #else
+        #define JSON_HEDLEY_NULL JSON_HEDLEY_STATIC_CAST(void*, 0)
+    #endif
+#elif defined(NULL)
+    #define JSON_HEDLEY_NULL NULL
+#else
+    #define JSON_HEDLEY_NULL ((void*) 0)
+#endif
+
+#if defined(JSON_HEDLEY_MESSAGE)
+    #undef JSON_HEDLEY_MESSAGE
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-pragmas")
+#  define JSON_HEDLEY_MESSAGE(msg) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS \
+    JSON_HEDLEY_PRAGMA(message msg) \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#elif \
+  JSON_HEDLEY_GCC_VERSION_CHECK(4,4,0) || \
+  JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+#  define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(message msg)
+#elif JSON_HEDLEY_CRAY_VERSION_CHECK(5,0,0)
+#  define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(_CRI message msg)
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+#  define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(message(msg))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(2,0,0)
+#  define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(message(msg))
+#else
+#  define JSON_HEDLEY_MESSAGE(msg)
+#endif
+
+#if defined(JSON_HEDLEY_WARNING)
+    #undef JSON_HEDLEY_WARNING
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-pragmas")
+#  define JSON_HEDLEY_WARNING(msg) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS \
+    JSON_HEDLEY_PRAGMA(clang warning msg) \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#elif \
+  JSON_HEDLEY_GCC_VERSION_CHECK(4,8,0) || \
+  JSON_HEDLEY_PGI_VERSION_CHECK(18,4,0) || \
+  JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+#  define JSON_HEDLEY_WARNING(msg) JSON_HEDLEY_PRAGMA(GCC warning msg)
+#elif \
+  JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0) || \
+  JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+#  define JSON_HEDLEY_WARNING(msg) JSON_HEDLEY_PRAGMA(message(msg))
+#else
+#  define JSON_HEDLEY_WARNING(msg) JSON_HEDLEY_MESSAGE(msg)
+#endif
+
+#if defined(JSON_HEDLEY_REQUIRE)
+    #undef JSON_HEDLEY_REQUIRE
+#endif
+#if defined(JSON_HEDLEY_REQUIRE_MSG)
+    #undef JSON_HEDLEY_REQUIRE_MSG
+#endif
+#if JSON_HEDLEY_HAS_ATTRIBUTE(diagnose_if)
+#  if JSON_HEDLEY_HAS_WARNING("-Wgcc-compat")
+#    define JSON_HEDLEY_REQUIRE(expr) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    _Pragma("clang diagnostic ignored \"-Wgcc-compat\"") \
+    __attribute__((diagnose_if(!(expr), #expr, "error"))) \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#    define JSON_HEDLEY_REQUIRE_MSG(expr,msg) \
+    JSON_HEDLEY_DIAGNOSTIC_PUSH \
+    _Pragma("clang diagnostic ignored \"-Wgcc-compat\"") \
+    __attribute__((diagnose_if(!(expr), msg, "error"))) \
+    JSON_HEDLEY_DIAGNOSTIC_POP
+#  else
+#    define JSON_HEDLEY_REQUIRE(expr) __attribute__((diagnose_if(!(expr), #expr, "error")))
+#    define JSON_HEDLEY_REQUIRE_MSG(expr,msg) __attribute__((diagnose_if(!(expr), msg, "error")))
+#  endif
+#else
+#  define JSON_HEDLEY_REQUIRE(expr)
+#  define JSON_HEDLEY_REQUIRE_MSG(expr,msg)
+#endif
+
+#if defined(JSON_HEDLEY_FLAGS)
+    #undef JSON_HEDLEY_FLAGS
+#endif
+#if JSON_HEDLEY_HAS_ATTRIBUTE(flag_enum) && (!defined(__cplusplus) || JSON_HEDLEY_HAS_WARNING("-Wbitfield-enum-conversion"))
+    #define JSON_HEDLEY_FLAGS __attribute__((__flag_enum__))
+#else
+    #define JSON_HEDLEY_FLAGS
+#endif
+
+#if defined(JSON_HEDLEY_FLAGS_CAST)
+    #undef JSON_HEDLEY_FLAGS_CAST
+#endif
+#if JSON_HEDLEY_INTEL_VERSION_CHECK(19,0,0)
+#  define JSON_HEDLEY_FLAGS_CAST(T, expr) (__extension__ ({ \
+        JSON_HEDLEY_DIAGNOSTIC_PUSH \
+        _Pragma("warning(disable:188)") \
+        ((T) (expr)); \
+        JSON_HEDLEY_DIAGNOSTIC_POP \
+    }))
+#else
+#  define JSON_HEDLEY_FLAGS_CAST(T, expr) JSON_HEDLEY_STATIC_CAST(T, expr)
+#endif
+
+#if defined(JSON_HEDLEY_EMPTY_BASES)
+    #undef JSON_HEDLEY_EMPTY_BASES
+#endif
+#if \
+    (JSON_HEDLEY_MSVC_VERSION_CHECK(19,0,23918) && !JSON_HEDLEY_MSVC_VERSION_CHECK(20,0,0)) || \
+    JSON_HEDLEY_INTEL_CL_VERSION_CHECK(2021,1,0)
+    #define JSON_HEDLEY_EMPTY_BASES __declspec(empty_bases)
+#else
+    #define JSON_HEDLEY_EMPTY_BASES
+#endif
+
+/* Remaining macros are deprecated. */
+
+#if defined(JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK)
+    #undef JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK
+#endif
+#if defined(__clang__)
+    #define JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK(major,minor,patch) (0)
+#else
+    #define JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK(major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
+
+#if defined(JSON_HEDLEY_CLANG_HAS_ATTRIBUTE)
+    #undef JSON_HEDLEY_CLANG_HAS_ATTRIBUTE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_ATTRIBUTE(attribute) JSON_HEDLEY_HAS_ATTRIBUTE(attribute)
+
+#if defined(JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE)
+    #undef JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE(attribute) JSON_HEDLEY_HAS_CPP_ATTRIBUTE(attribute)
+
+#if defined(JSON_HEDLEY_CLANG_HAS_BUILTIN)
+    #undef JSON_HEDLEY_CLANG_HAS_BUILTIN
+#endif
+#define JSON_HEDLEY_CLANG_HAS_BUILTIN(builtin) JSON_HEDLEY_HAS_BUILTIN(builtin)
+
+#if defined(JSON_HEDLEY_CLANG_HAS_FEATURE)
+    #undef JSON_HEDLEY_CLANG_HAS_FEATURE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_FEATURE(feature) JSON_HEDLEY_HAS_FEATURE(feature)
+
+#if defined(JSON_HEDLEY_CLANG_HAS_EXTENSION)
+    #undef JSON_HEDLEY_CLANG_HAS_EXTENSION
+#endif
+#define JSON_HEDLEY_CLANG_HAS_EXTENSION(extension) JSON_HEDLEY_HAS_EXTENSION(extension)
+
+#if defined(JSON_HEDLEY_CLANG_HAS_DECLSPEC_DECLSPEC_ATTRIBUTE)
+    #undef JSON_HEDLEY_CLANG_HAS_DECLSPEC_DECLSPEC_ATTRIBUTE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_DECLSPEC_ATTRIBUTE(attribute) JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE(attribute)
+
+#if defined(JSON_HEDLEY_CLANG_HAS_WARNING)
+    #undef JSON_HEDLEY_CLANG_HAS_WARNING
+#endif
+#define JSON_HEDLEY_CLANG_HAS_WARNING(warning) JSON_HEDLEY_HAS_WARNING(warning)
+
+#endif /* !defined(JSON_HEDLEY_VERSION) || (JSON_HEDLEY_VERSION < X) */
+
+// #include <nlohmann/detail/meta/detected.hpp>
+
+
+#include <type_traits>
+
+// #include <nlohmann/detail/meta/void_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename ...Ts> struct make_void
+{
+    using type = void;
+};
+template<typename ...Ts> using void_t = typename make_void<Ts...>::type;
+} // namespace detail
+}  // namespace nlohmann
+
+
+// https://en.cppreference.com/w/cpp/experimental/is_detected
+namespace nlohmann
+{
+namespace detail
+{
+struct nonesuch
+{
+    nonesuch() = delete;
+    ~nonesuch() = delete;
+    nonesuch(nonesuch const&) = delete;
+    nonesuch(nonesuch const&&) = delete;
+    void operator=(nonesuch const&) = delete;
+    void operator=(nonesuch&&) = delete;
+};
+
+template<class Default,
+         class AlwaysVoid,
+         template<class...> class Op,
+         class... Args>
+struct detector
+{
+    using value_t = std::false_type;
+    using type = Default;
+};
+
+template<class Default, template<class...> class Op, class... Args>
+struct detector<Default, void_t<Op<Args...>>, Op, Args...>
+{
+    using value_t = std::true_type;
+    using type = Op<Args...>;
+};
+
+template<template<class...> class Op, class... Args>
+using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
+
+template<template<class...> class Op, class... Args>
+struct is_detected_lazy : is_detected<Op, Args...> { };
+
+template<template<class...> class Op, class... Args>
+using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
+
+template<class Default, template<class...> class Op, class... Args>
+using detected_or = detector<Default, void, Op, Args...>;
+
+template<class Default, template<class...> class Op, class... Args>
+using detected_or_t = typename detected_or<Default, Op, Args...>::type;
+
+template<class Expected, template<class...> class Op, class... Args>
+using is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>;
+
+template<class To, template<class...> class Op, class... Args>
+using is_detected_convertible =
+    std::is_convertible<detected_t<Op, Args...>, To>;
+}  // namespace detail
+}  // namespace nlohmann
+
+
+// This file contains all internal macro definitions
+// You MUST include macro_unscope.hpp at the end of json.hpp to undef all of them
+
+// exclude unsupported compilers
+#if !defined(JSON_SKIP_UNSUPPORTED_COMPILER_CHECK)
+    #if defined(__clang__)
+        #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400
+            #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
+        #endif
+    #elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER))
+        #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40800
+            #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
+        #endif
+    #endif
+#endif
+
+// C++ language standard detection
+// if the user manually specified the used c++ version this is skipped
+#if !defined(JSON_HAS_CPP_20) && !defined(JSON_HAS_CPP_17) && !defined(JSON_HAS_CPP_14) && !defined(JSON_HAS_CPP_11)
+    #if (defined(__cplusplus) && __cplusplus >= 202002L) || (defined(_MSVC_LANG) && _MSVC_LANG >= 202002L)
+        #define JSON_HAS_CPP_20
+        #define JSON_HAS_CPP_17
+        #define JSON_HAS_CPP_14
+    #elif (defined(__cplusplus) && __cplusplus >= 201703L) || (defined(_HAS_CXX17) && _HAS_CXX17 == 1) // fix for issue #464
+        #define JSON_HAS_CPP_17
+        #define JSON_HAS_CPP_14
+    #elif (defined(__cplusplus) && __cplusplus >= 201402L) || (defined(_HAS_CXX14) && _HAS_CXX14 == 1)
+        #define JSON_HAS_CPP_14
+    #endif
+    // the cpp 11 flag is always specified because it is the minimal required version
+    #define JSON_HAS_CPP_11
+#endif
+
+// disable documentation warnings on clang
+#if defined(__clang__)
+    #pragma clang diagnostic push
+    #pragma clang diagnostic ignored "-Wdocumentation"
+    #pragma clang diagnostic ignored "-Wdocumentation-unknown-command"
+#endif
+
+// allow to disable exceptions
+#if (defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND)) && !defined(JSON_NOEXCEPTION)
+    #define JSON_THROW(exception) throw exception
+    #define JSON_TRY try
+    #define JSON_CATCH(exception) catch(exception)
+    #define JSON_INTERNAL_CATCH(exception) catch(exception)
+#else
+    #include <cstdlib>
+    #define JSON_THROW(exception) std::abort()
+    #define JSON_TRY if(true)
+    #define JSON_CATCH(exception) if(false)
+    #define JSON_INTERNAL_CATCH(exception) if(false)
+#endif
+
+// override exception macros
+#if defined(JSON_THROW_USER)
+    #undef JSON_THROW
+    #define JSON_THROW JSON_THROW_USER
+#endif
+#if defined(JSON_TRY_USER)
+    #undef JSON_TRY
+    #define JSON_TRY JSON_TRY_USER
+#endif
+#if defined(JSON_CATCH_USER)
+    #undef JSON_CATCH
+    #define JSON_CATCH JSON_CATCH_USER
+    #undef JSON_INTERNAL_CATCH
+    #define JSON_INTERNAL_CATCH JSON_CATCH_USER
+#endif
+#if defined(JSON_INTERNAL_CATCH_USER)
+    #undef JSON_INTERNAL_CATCH
+    #define JSON_INTERNAL_CATCH JSON_INTERNAL_CATCH_USER
+#endif
+
+// allow to override assert
+#if !defined(JSON_ASSERT)
+    #include <cassert> // assert
+    #define JSON_ASSERT(x) assert(x)
+#endif
+
+// allow to access some private functions (needed by the test suite)
+#if defined(JSON_TESTS_PRIVATE)
+    #define JSON_PRIVATE_UNLESS_TESTED public
+#else
+    #define JSON_PRIVATE_UNLESS_TESTED private
+#endif
+
+/*!
+@brief macro to briefly define a mapping between an enum and JSON
+@def NLOHMANN_JSON_SERIALIZE_ENUM
+@since version 3.4.0
+*/
+#define NLOHMANN_JSON_SERIALIZE_ENUM(ENUM_TYPE, ...)                                            \
+    template<typename BasicJsonType>                                                            \
+    inline void to_json(BasicJsonType& j, const ENUM_TYPE& e)                                   \
+    {                                                                                           \
+        static_assert(std::is_enum<ENUM_TYPE>::value, #ENUM_TYPE " must be an enum!");          \
+        static const std::pair<ENUM_TYPE, BasicJsonType> m[] = __VA_ARGS__;                     \
+        auto it = std::find_if(std::begin(m), std::end(m),                                      \
+                               [e](const std::pair<ENUM_TYPE, BasicJsonType>& ej_pair) -> bool  \
+        {                                                                                       \
+            return ej_pair.first == e;                                                          \
+        });                                                                                     \
+        j = ((it != std::end(m)) ? it : std::begin(m))->second;                                 \
+    }                                                                                           \
+    template<typename BasicJsonType>                                                            \
+    inline void from_json(const BasicJsonType& j, ENUM_TYPE& e)                                 \
+    {                                                                                           \
+        static_assert(std::is_enum<ENUM_TYPE>::value, #ENUM_TYPE " must be an enum!");          \
+        static const std::pair<ENUM_TYPE, BasicJsonType> m[] = __VA_ARGS__;                     \
+        auto it = std::find_if(std::begin(m), std::end(m),                                      \
+                               [&j](const std::pair<ENUM_TYPE, BasicJsonType>& ej_pair) -> bool \
+        {                                                                                       \
+            return ej_pair.second == j;                                                         \
+        });                                                                                     \
+        e = ((it != std::end(m)) ? it : std::begin(m))->first;                                  \
+    }
+
+// Ugly macros to avoid uglier copy-paste when specializing basic_json. They
+// may be removed in the future once the class is split.
+
+#define NLOHMANN_BASIC_JSON_TPL_DECLARATION                                \
+    template<template<typename, typename, typename...> class ObjectType,   \
+             template<typename, typename...> class ArrayType,              \
+             class StringType, class BooleanType, class NumberIntegerType, \
+             class NumberUnsignedType, class NumberFloatType,              \
+             template<typename> class AllocatorType,                       \
+             template<typename, typename = void> class JSONSerializer,     \
+             class BinaryType>
+
+#define NLOHMANN_BASIC_JSON_TPL                                            \
+    basic_json<ObjectType, ArrayType, StringType, BooleanType,             \
+    NumberIntegerType, NumberUnsignedType, NumberFloatType,                \
+    AllocatorType, JSONSerializer, BinaryType>
+
+// Macros to simplify conversion from/to types
+
+#define NLOHMANN_JSON_EXPAND( x ) x
+#define NLOHMANN_JSON_GET_MACRO(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, _41, _42, _43, _44, _45, _46, _47, _48, _49, _50, _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, _61, _62, _63, _64, NAME,...) NAME
+#define NLOHMANN_JSON_PASTE(...) NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_GET_MACRO(__VA_ARGS__, \
+        NLOHMANN_JSON_PASTE64, \
+        NLOHMANN_JSON_PASTE63, \
+        NLOHMANN_JSON_PASTE62, \
+        NLOHMANN_JSON_PASTE61, \
+        NLOHMANN_JSON_PASTE60, \
+        NLOHMANN_JSON_PASTE59, \
+        NLOHMANN_JSON_PASTE58, \
+        NLOHMANN_JSON_PASTE57, \
+        NLOHMANN_JSON_PASTE56, \
+        NLOHMANN_JSON_PASTE55, \
+        NLOHMANN_JSON_PASTE54, \
+        NLOHMANN_JSON_PASTE53, \
+        NLOHMANN_JSON_PASTE52, \
+        NLOHMANN_JSON_PASTE51, \
+        NLOHMANN_JSON_PASTE50, \
+        NLOHMANN_JSON_PASTE49, \
+        NLOHMANN_JSON_PASTE48, \
+        NLOHMANN_JSON_PASTE47, \
+        NLOHMANN_JSON_PASTE46, \
+        NLOHMANN_JSON_PASTE45, \
+        NLOHMANN_JSON_PASTE44, \
+        NLOHMANN_JSON_PASTE43, \
+        NLOHMANN_JSON_PASTE42, \
+        NLOHMANN_JSON_PASTE41, \
+        NLOHMANN_JSON_PASTE40, \
+        NLOHMANN_JSON_PASTE39, \
+        NLOHMANN_JSON_PASTE38, \
+        NLOHMANN_JSON_PASTE37, \
+        NLOHMANN_JSON_PASTE36, \
+        NLOHMANN_JSON_PASTE35, \
+        NLOHMANN_JSON_PASTE34, \
+        NLOHMANN_JSON_PASTE33, \
+        NLOHMANN_JSON_PASTE32, \
+        NLOHMANN_JSON_PASTE31, \
+        NLOHMANN_JSON_PASTE30, \
+        NLOHMANN_JSON_PASTE29, \
+        NLOHMANN_JSON_PASTE28, \
+        NLOHMANN_JSON_PASTE27, \
+        NLOHMANN_JSON_PASTE26, \
+        NLOHMANN_JSON_PASTE25, \
+        NLOHMANN_JSON_PASTE24, \
+        NLOHMANN_JSON_PASTE23, \
+        NLOHMANN_JSON_PASTE22, \
+        NLOHMANN_JSON_PASTE21, \
+        NLOHMANN_JSON_PASTE20, \
+        NLOHMANN_JSON_PASTE19, \
+        NLOHMANN_JSON_PASTE18, \
+        NLOHMANN_JSON_PASTE17, \
+        NLOHMANN_JSON_PASTE16, \
+        NLOHMANN_JSON_PASTE15, \
+        NLOHMANN_JSON_PASTE14, \
+        NLOHMANN_JSON_PASTE13, \
+        NLOHMANN_JSON_PASTE12, \
+        NLOHMANN_JSON_PASTE11, \
+        NLOHMANN_JSON_PASTE10, \
+        NLOHMANN_JSON_PASTE9, \
+        NLOHMANN_JSON_PASTE8, \
+        NLOHMANN_JSON_PASTE7, \
+        NLOHMANN_JSON_PASTE6, \
+        NLOHMANN_JSON_PASTE5, \
+        NLOHMANN_JSON_PASTE4, \
+        NLOHMANN_JSON_PASTE3, \
+        NLOHMANN_JSON_PASTE2, \
+        NLOHMANN_JSON_PASTE1)(__VA_ARGS__))
+#define NLOHMANN_JSON_PASTE2(func, v1) func(v1)
+#define NLOHMANN_JSON_PASTE3(func, v1, v2) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE2(func, v2)
+#define NLOHMANN_JSON_PASTE4(func, v1, v2, v3) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE3(func, v2, v3)
+#define NLOHMANN_JSON_PASTE5(func, v1, v2, v3, v4) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE4(func, v2, v3, v4)
+#define NLOHMANN_JSON_PASTE6(func, v1, v2, v3, v4, v5) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE5(func, v2, v3, v4, v5)
+#define NLOHMANN_JSON_PASTE7(func, v1, v2, v3, v4, v5, v6) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE6(func, v2, v3, v4, v5, v6)
+#define NLOHMANN_JSON_PASTE8(func, v1, v2, v3, v4, v5, v6, v7) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE7(func, v2, v3, v4, v5, v6, v7)
+#define NLOHMANN_JSON_PASTE9(func, v1, v2, v3, v4, v5, v6, v7, v8) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE8(func, v2, v3, v4, v5, v6, v7, v8)
+#define NLOHMANN_JSON_PASTE10(func, v1, v2, v3, v4, v5, v6, v7, v8, v9) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE9(func, v2, v3, v4, v5, v6, v7, v8, v9)
+#define NLOHMANN_JSON_PASTE11(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE10(func, v2, v3, v4, v5, v6, v7, v8, v9, v10)
+#define NLOHMANN_JSON_PASTE12(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE11(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11)
+#define NLOHMANN_JSON_PASTE13(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE12(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12)
+#define NLOHMANN_JSON_PASTE14(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE13(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13)
+#define NLOHMANN_JSON_PASTE15(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE14(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14)
+#define NLOHMANN_JSON_PASTE16(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE15(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15)
+#define NLOHMANN_JSON_PASTE17(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE16(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16)
+#define NLOHMANN_JSON_PASTE18(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE17(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17)
+#define NLOHMANN_JSON_PASTE19(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE18(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18)
+#define NLOHMANN_JSON_PASTE20(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE19(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19)
+#define NLOHMANN_JSON_PASTE21(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE20(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20)
+#define NLOHMANN_JSON_PASTE22(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE21(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21)
+#define NLOHMANN_JSON_PASTE23(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE22(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22)
+#define NLOHMANN_JSON_PASTE24(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE23(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23)
+#define NLOHMANN_JSON_PASTE25(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE24(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24)
+#define NLOHMANN_JSON_PASTE26(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE25(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25)
+#define NLOHMANN_JSON_PASTE27(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE26(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26)
+#define NLOHMANN_JSON_PASTE28(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE27(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27)
+#define NLOHMANN_JSON_PASTE29(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE28(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28)
+#define NLOHMANN_JSON_PASTE30(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE29(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29)
+#define NLOHMANN_JSON_PASTE31(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE30(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30)
+#define NLOHMANN_JSON_PASTE32(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE31(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31)
+#define NLOHMANN_JSON_PASTE33(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE32(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32)
+#define NLOHMANN_JSON_PASTE34(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE33(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33)
+#define NLOHMANN_JSON_PASTE35(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE34(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34)
+#define NLOHMANN_JSON_PASTE36(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE35(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35)
+#define NLOHMANN_JSON_PASTE37(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE36(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36)
+#define NLOHMANN_JSON_PASTE38(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE37(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37)
+#define NLOHMANN_JSON_PASTE39(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE38(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38)
+#define NLOHMANN_JSON_PASTE40(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE39(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39)
+#define NLOHMANN_JSON_PASTE41(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE40(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40)
+#define NLOHMANN_JSON_PASTE42(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE41(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41)
+#define NLOHMANN_JSON_PASTE43(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE42(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42)
+#define NLOHMANN_JSON_PASTE44(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE43(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43)
+#define NLOHMANN_JSON_PASTE45(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE44(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44)
+#define NLOHMANN_JSON_PASTE46(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE45(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45)
+#define NLOHMANN_JSON_PASTE47(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE46(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46)
+#define NLOHMANN_JSON_PASTE48(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE47(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47)
+#define NLOHMANN_JSON_PASTE49(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE48(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48)
+#define NLOHMANN_JSON_PASTE50(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE49(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49)
+#define NLOHMANN_JSON_PASTE51(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE50(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50)
+#define NLOHMANN_JSON_PASTE52(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE51(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51)
+#define NLOHMANN_JSON_PASTE53(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE52(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52)
+#define NLOHMANN_JSON_PASTE54(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE53(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53)
+#define NLOHMANN_JSON_PASTE55(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE54(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54)
+#define NLOHMANN_JSON_PASTE56(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE55(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55)
+#define NLOHMANN_JSON_PASTE57(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE56(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56)
+#define NLOHMANN_JSON_PASTE58(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE57(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57)
+#define NLOHMANN_JSON_PASTE59(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE58(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58)
+#define NLOHMANN_JSON_PASTE60(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE59(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59)
+#define NLOHMANN_JSON_PASTE61(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE60(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60)
+#define NLOHMANN_JSON_PASTE62(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60, v61) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE61(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60, v61)
+#define NLOHMANN_JSON_PASTE63(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60, v61, v62) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE62(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60, v61, v62)
+#define NLOHMANN_JSON_PASTE64(func, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60, v61, v62, v63) NLOHMANN_JSON_PASTE2(func, v1) NLOHMANN_JSON_PASTE63(func, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42, v43, v44, v45, v46, v47, v48, v49, v50, v51, v52, v53, v54, v55, v56, v57, v58, v59, v60, v61, v62, v63)
+
+#define NLOHMANN_JSON_TO(v1) nlohmann_json_j[#v1] = nlohmann_json_t.v1;
+#define NLOHMANN_JSON_FROM(v1) nlohmann_json_j.at(#v1).get_to(nlohmann_json_t.v1);
+
+/*!
+@brief macro
+@def NLOHMANN_DEFINE_TYPE_INTRUSIVE
+@since version 3.9.0
+*/
+#define NLOHMANN_DEFINE_TYPE_INTRUSIVE(Type, ...)  \
+    friend void to_json(nlohmann::json& nlohmann_json_j, const Type& nlohmann_json_t) { NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(NLOHMANN_JSON_TO, __VA_ARGS__)) } \
+    friend void from_json(const nlohmann::json& nlohmann_json_j, Type& nlohmann_json_t) { NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(NLOHMANN_JSON_FROM, __VA_ARGS__)) }
+
+/*!
+@brief macro
+@def NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE
+@since version 3.9.0
+*/
+#define NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(Type, ...)  \
+    inline void to_json(nlohmann::json& nlohmann_json_j, const Type& nlohmann_json_t) { NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(NLOHMANN_JSON_TO, __VA_ARGS__)) } \
+    inline void from_json(const nlohmann::json& nlohmann_json_j, Type& nlohmann_json_t) { NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(NLOHMANN_JSON_FROM, __VA_ARGS__)) }
+
+
+// inspired from https://stackoverflow.com/a/26745591
+// allows to call any std function as if (e.g. with begin):
+// using std::begin; begin(x);
+//
+// it allows using the detected idiom to retrieve the return type
+// of such an expression
+#define NLOHMANN_CAN_CALL_STD_FUNC_IMPL(std_name)                                 \
+    namespace detail {                                                            \
+    using std::std_name;                                                          \
+    \
+    template<typename... T>                                                       \
+    using result_of_##std_name = decltype(std_name(std::declval<T>()...));        \
+    }                                                                             \
+    \
+    namespace detail2 {                                                           \
+    struct std_name##_tag                                                         \
+    {                                                                             \
+    };                                                                            \
+    \
+    template<typename... T>                                                       \
+    std_name##_tag std_name(T&&...);                                              \
+    \
+    template<typename... T>                                                       \
+    using result_of_##std_name = decltype(std_name(std::declval<T>()...));        \
+    \
+    template<typename... T>                                                       \
+    struct would_call_std_##std_name                                              \
+    {                                                                             \
+        static constexpr auto const value = ::nlohmann::detail::                  \
+                                            is_detected_exact<std_name##_tag, result_of_##std_name, T...>::value; \
+    };                                                                            \
+    } /* namespace detail2 */ \
+    \
+    template<typename... T>                                                       \
+    struct would_call_std_##std_name : detail2::would_call_std_##std_name<T...>   \
+    {                                                                             \
+    }
+
+#ifndef JSON_USE_IMPLICIT_CONVERSIONS
+    #define JSON_USE_IMPLICIT_CONVERSIONS 1
+#endif
+
+#if JSON_USE_IMPLICIT_CONVERSIONS
+    #define JSON_EXPLICIT
+#else
+    #define JSON_EXPLICIT explicit
+#endif
+
+#ifndef JSON_DIAGNOSTICS
+    #define JSON_DIAGNOSTICS 0
+#endif
+
+
+namespace nlohmann
+{
+namespace detail
+{
+
+/*!
+@brief replace all occurrences of a substring by another string
+
+@param[in,out] s  the string to manipulate; changed so that all
+               occurrences of @a f are replaced with @a t
+@param[in]     f  the substring to replace with @a t
+@param[in]     t  the string to replace @a f
+
+@pre The search string @a f must not be empty. **This precondition is
+enforced with an assertion.**
+
+@since version 2.0.0
+*/
+inline void replace_substring(std::string& s, const std::string& f,
+                              const std::string& t)
+{
+    JSON_ASSERT(!f.empty());
+    for (auto pos = s.find(f);                // find first occurrence of f
+            pos != std::string::npos;         // make sure f was found
+            s.replace(pos, f.size(), t),      // replace with t, and
+            pos = s.find(f, pos + t.size()))  // find next occurrence of f
+    {}
+}
+
+/*!
+ * @brief string escaping as described in RFC 6901 (Sect. 4)
+ * @param[in] s string to escape
+ * @return    escaped string
+ *
+ * Note the order of escaping "~" to "~0" and "/" to "~1" is important.
+ */
+inline std::string escape(std::string s)
+{
+    replace_substring(s, "~", "~0");
+    replace_substring(s, "/", "~1");
+    return s;
+}
+
+/*!
+ * @brief string unescaping as described in RFC 6901 (Sect. 4)
+ * @param[in] s string to unescape
+ * @return    unescaped string
+ *
+ * Note the order of escaping "~1" to "/" and "~0" to "~" is important.
+ */
+static void unescape(std::string& s)
+{
+    replace_substring(s, "~1", "/");
+    replace_substring(s, "~0", "~");
+}
+
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/input/position_t.hpp>
+
+
+#include <cstddef> // size_t
+
+namespace nlohmann
+{
+namespace detail
+{
+/// struct to capture the start position of the current token
+struct position_t
+{
+    /// the total number of characters read
+    std::size_t chars_read_total = 0;
+    /// the number of characters read in the current line
+    std::size_t chars_read_current_line = 0;
+    /// the number of lines read
+    std::size_t lines_read = 0;
+
+    /// conversion to size_t to preserve SAX interface
+    constexpr operator size_t() const
+    {
+        return chars_read_total;
+    }
+};
+
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+////////////////
+// exceptions //
+////////////////
+
+/*!
+@brief general exception of the @ref basic_json class
+
+This class is an extension of `std::exception` objects with a member @a id for
+exception ids. It is used as the base class for all exceptions thrown by the
+@ref basic_json class. This class can hence be used as "wildcard" to catch
+exceptions.
+
+Subclasses:
+- @ref parse_error for exceptions indicating a parse error
+- @ref invalid_iterator for exceptions indicating errors with iterators
+- @ref type_error for exceptions indicating executing a member function with
+                  a wrong type
+- @ref out_of_range for exceptions indicating access out of the defined range
+- @ref other_error for exceptions indicating other library errors
+
+@internal
+@note To have nothrow-copy-constructible exceptions, we internally use
+      `std::runtime_error` which can cope with arbitrary-length error messages.
+      Intermediate strings are built with static functions and then passed to
+      the actual constructor.
+@endinternal
+
+@liveexample{The following code shows how arbitrary library exceptions can be
+caught.,exception}
+
+@since version 3.0.0
+*/
+class exception : public std::exception
+{
+  public:
+    /// returns the explanatory string
+    const char* what() const noexcept override
+    {
+        return m.what();
+    }
+
+    /// the id of the exception
+    const int id; // NOLINT(cppcoreguidelines-non-private-member-variables-in-classes)
+
+  protected:
+    JSON_HEDLEY_NON_NULL(3)
+    exception(int id_, const char* what_arg) : id(id_), m(what_arg) {}
+
+    static std::string name(const std::string& ename, int id_)
+    {
+        return "[json.exception." + ename + "." + std::to_string(id_) + "] ";
+    }
+
+    template<typename BasicJsonType>
+    static std::string diagnostics(const BasicJsonType& leaf_element)
+    {
+#if JSON_DIAGNOSTICS
+        std::vector<std::string> tokens;
+        for (const auto* current = &leaf_element; current->m_parent != nullptr; current = current->m_parent)
+        {
+            switch (current->m_parent->type())
+            {
+                case value_t::array:
+                {
+                    for (std::size_t i = 0; i < current->m_parent->m_value.array->size(); ++i)
+                    {
+                        if (&current->m_parent->m_value.array->operator[](i) == current)
+                        {
+                            tokens.emplace_back(std::to_string(i));
+                            break;
+                        }
+                    }
+                    break;
+                }
+
+                case value_t::object:
+                {
+                    for (const auto& element : *current->m_parent->m_value.object)
+                    {
+                        if (&element.second == current)
+                        {
+                            tokens.emplace_back(element.first.c_str());
+                            break;
+                        }
+                    }
+                    break;
+                }
+
+                case value_t::null: // LCOV_EXCL_LINE
+                case value_t::string: // LCOV_EXCL_LINE
+                case value_t::boolean: // LCOV_EXCL_LINE
+                case value_t::number_integer: // LCOV_EXCL_LINE
+                case value_t::number_unsigned: // LCOV_EXCL_LINE
+                case value_t::number_float: // LCOV_EXCL_LINE
+                case value_t::binary: // LCOV_EXCL_LINE
+                case value_t::discarded: // LCOV_EXCL_LINE
+                default:   // LCOV_EXCL_LINE
+                    break; // LCOV_EXCL_LINE
+            }
+        }
+
+        if (tokens.empty())
+        {
+            return "";
+        }
+
+        return "(" + std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
+                                     [](const std::string & a, const std::string & b)
+        {
+            return a + "/" + detail::escape(b);
+        }) + ") ";
+#else
+        static_cast<void>(leaf_element);
+        return "";
+#endif
+    }
+
+  private:
+    /// an exception object as storage for error messages
+    std::runtime_error m;
+};
+
+/*!
+@brief exception indicating a parse error
+
+This exception is thrown by the library when a parse error occurs. Parse errors
+can occur during the deserialization of JSON text, CBOR, MessagePack, as well
+as when using JSON Patch.
+
+Member @a byte holds the byte index of the last read character in the input
+file.
+
+Exceptions have ids 1xx.
+
+name / id                      | example message | description
+------------------------------ | --------------- | -------------------------
+json.exception.parse_error.101 | parse error at 2: unexpected end of input; expected string literal | This error indicates a syntax error while deserializing a JSON text. The error message describes that an unexpected token (character) was encountered, and the member @a byte indicates the error position.
+json.exception.parse_error.102 | parse error at 14: missing or wrong low surrogate | JSON uses the `\uxxxx` format to describe Unicode characters. Code points above above 0xFFFF are split into two `\uxxxx` entries ("surrogate pairs"). This error indicates that the surrogate pair is incomplete or contains an invalid code point.
+json.exception.parse_error.103 | parse error: code points above 0x10FFFF are invalid | Unicode supports code points up to 0x10FFFF. Code points above 0x10FFFF are invalid.
+json.exception.parse_error.104 | parse error: JSON patch must be an array of objects | [RFC 6902](https://tools.ietf.org/html/rfc6902) requires a JSON Patch document to be a JSON document that represents an array of objects.
+json.exception.parse_error.105 | parse error: operation must have string member 'op' | An operation of a JSON Patch document must contain exactly one "op" member, whose value indicates the operation to perform. Its value must be one of "add", "remove", "replace", "move", "copy", or "test"; other values are errors.
+json.exception.parse_error.106 | parse error: array index '01' must not begin with '0' | An array index in a JSON Pointer ([RFC 6901](https://tools.ietf.org/html/rfc6901)) may be `0` or any number without a leading `0`.
+json.exception.parse_error.107 | parse error: JSON pointer must be empty or begin with '/' - was: 'foo' | A JSON Pointer must be a Unicode string containing a sequence of zero or more reference tokens, each prefixed by a `/` character.
+json.exception.parse_error.108 | parse error: escape character '~' must be followed with '0' or '1' | In a JSON Pointer, only `~0` and `~1` are valid escape sequences.
+json.exception.parse_error.109 | parse error: array index 'one' is not a number | A JSON Pointer array index must be a number.
+json.exception.parse_error.110 | parse error at 1: cannot read 2 bytes from vector | When parsing CBOR or MessagePack, the byte vector ends before the complete value has been read.
+json.exception.parse_error.112 | parse error at 1: error reading CBOR; last byte: 0xF8 | Not all types of CBOR or MessagePack are supported. This exception occurs if an unsupported byte was read.
+json.exception.parse_error.113 | parse error at 2: expected a CBOR string; last byte: 0x98 | While parsing a map key, a value that is not a string has been read.
+json.exception.parse_error.114 | parse error: Unsupported BSON record type 0x0F | The parsing of the corresponding BSON record type is not implemented (yet).
+json.exception.parse_error.115 | parse error at byte 5: syntax error while parsing UBJSON high-precision number: invalid number text: 1A | A UBJSON high-precision number could not be parsed.
+
+@note For an input with n bytes, 1 is the index of the first character and n+1
+      is the index of the terminating null byte or the end of file. This also
+      holds true when reading a byte vector (CBOR or MessagePack).
+
+@liveexample{The following code shows how a `parse_error` exception can be
+caught.,parse_error}
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref type_error for exceptions indicating executing a member function with
+                    a wrong type
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref other_error for exceptions indicating other library errors
+
+@since version 3.0.0
+*/
+class parse_error : public exception
+{
+  public:
+    /*!
+    @brief create a parse error exception
+    @param[in] id_       the id of the exception
+    @param[in] pos       the position where the error occurred (or with
+                         chars_read_total=0 if the position cannot be
+                         determined)
+    @param[in] what_arg  the explanatory string
+    @return parse_error object
+    */
+    template<typename BasicJsonType>
+    static parse_error create(int id_, const position_t& pos, const std::string& what_arg, const BasicJsonType& context)
+    {
+        std::string w = exception::name("parse_error", id_) + "parse error" +
+                        position_string(pos) + ": " + exception::diagnostics(context) + what_arg;
+        return parse_error(id_, pos.chars_read_total, w.c_str());
+    }
+
+    template<typename BasicJsonType>
+    static parse_error create(int id_, std::size_t byte_, const std::string& what_arg, const BasicJsonType& context)
+    {
+        std::string w = exception::name("parse_error", id_) + "parse error" +
+                        (byte_ != 0 ? (" at byte " + std::to_string(byte_)) : "") +
+                        ": " + exception::diagnostics(context) + what_arg;
+        return parse_error(id_, byte_, w.c_str());
+    }
+
+    /*!
+    @brief byte index of the parse error
+
+    The byte index of the last read character in the input file.
+
+    @note For an input with n bytes, 1 is the index of the first character and
+          n+1 is the index of the terminating null byte or the end of file.
+          This also holds true when reading a byte vector (CBOR or MessagePack).
+    */
+    const std::size_t byte;
+
+  private:
+    parse_error(int id_, std::size_t byte_, const char* what_arg)
+        : exception(id_, what_arg), byte(byte_) {}
+
+    static std::string position_string(const position_t& pos)
+    {
+        return " at line " + std::to_string(pos.lines_read + 1) +
+               ", column " + std::to_string(pos.chars_read_current_line);
+    }
+};
+
+/*!
+@brief exception indicating errors with iterators
+
+This exception is thrown if iterators passed to a library function do not match
+the expected semantics.
+
+Exceptions have ids 2xx.
+
+name / id                           | example message | description
+----------------------------------- | --------------- | -------------------------
+json.exception.invalid_iterator.201 | iterators are not compatible | The iterators passed to constructor @ref basic_json(InputIT first, InputIT last) are not compatible, meaning they do not belong to the same container. Therefore, the range (@a first, @a last) is invalid.
+json.exception.invalid_iterator.202 | iterator does not fit current value | In an erase or insert function, the passed iterator @a pos does not belong to the JSON value for which the function was called. It hence does not define a valid position for the deletion/insertion.
+json.exception.invalid_iterator.203 | iterators do not fit current value | Either iterator passed to function @ref erase(IteratorType first, IteratorType last) does not belong to the JSON value from which values shall be erased. It hence does not define a valid range to delete values from.
+json.exception.invalid_iterator.204 | iterators out of range | When an iterator range for a primitive type (number, boolean, or string) is passed to a constructor or an erase function, this range has to be exactly (@ref begin(), @ref end()), because this is the only way the single stored value is expressed. All other ranges are invalid.
+json.exception.invalid_iterator.205 | iterator out of range | When an iterator for a primitive type (number, boolean, or string) is passed to an erase function, the iterator has to be the @ref begin() iterator, because it is the only way to address the stored value. All other iterators are invalid.
+json.exception.invalid_iterator.206 | cannot construct with iterators from null | The iterators passed to constructor @ref basic_json(InputIT first, InputIT last) belong to a JSON null value and hence to not define a valid range.
+json.exception.invalid_iterator.207 | cannot use key() for non-object iterators | The key() member function can only be used on iterators belonging to a JSON object, because other types do not have a concept of a key.
+json.exception.invalid_iterator.208 | cannot use operator[] for object iterators | The operator[] to specify a concrete offset cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
+json.exception.invalid_iterator.209 | cannot use offsets with object iterators | The offset operators (+, -, +=, -=) cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
+json.exception.invalid_iterator.210 | iterators do not fit | The iterator range passed to the insert function are not compatible, meaning they do not belong to the same container. Therefore, the range (@a first, @a last) is invalid.
+json.exception.invalid_iterator.211 | passed iterators may not belong to container | The iterator range passed to the insert function must not be a subrange of the container to insert to.
+json.exception.invalid_iterator.212 | cannot compare iterators of different containers | When two iterators are compared, they must belong to the same container.
+json.exception.invalid_iterator.213 | cannot compare order of object iterators | The order of object iterators cannot be compared, because JSON objects are unordered.
+json.exception.invalid_iterator.214 | cannot get value | Cannot get value for iterator: Either the iterator belongs to a null value or it is an iterator to a primitive type (number, boolean, or string), but the iterator is different to @ref begin().
+
+@liveexample{The following code shows how an `invalid_iterator` exception can be
+caught.,invalid_iterator}
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref type_error for exceptions indicating executing a member function with
+                    a wrong type
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref other_error for exceptions indicating other library errors
+
+@since version 3.0.0
+*/
+class invalid_iterator : public exception
+{
+  public:
+    template<typename BasicJsonType>
+    static invalid_iterator create(int id_, const std::string& what_arg, const BasicJsonType& context)
+    {
+        std::string w = exception::name("invalid_iterator", id_) + exception::diagnostics(context) + what_arg;
+        return invalid_iterator(id_, w.c_str());
+    }
+
+  private:
+    JSON_HEDLEY_NON_NULL(3)
+    invalid_iterator(int id_, const char* what_arg)
+        : exception(id_, what_arg) {}
+};
+
+/*!
+@brief exception indicating executing a member function with a wrong type
+
+This exception is thrown in case of a type error; that is, a library function is
+executed on a JSON value whose type does not match the expected semantics.
+
+Exceptions have ids 3xx.
+
+name / id                     | example message | description
+----------------------------- | --------------- | -------------------------
+json.exception.type_error.301 | cannot create object from initializer list | To create an object from an initializer list, the initializer list must consist only of a list of pairs whose first element is a string. When this constraint is violated, an array is created instead.
+json.exception.type_error.302 | type must be object, but is array | During implicit or explicit value conversion, the JSON type must be compatible to the target type. For instance, a JSON string can only be converted into string types, but not into numbers or boolean types.
+json.exception.type_error.303 | incompatible ReferenceType for get_ref, actual type is object | To retrieve a reference to a value stored in a @ref basic_json object with @ref get_ref, the type of the reference must match the value type. For instance, for a JSON array, the @a ReferenceType must be @ref array_t &.
+json.exception.type_error.304 | cannot use at() with string | The @ref at() member functions can only be executed for certain JSON types.
+json.exception.type_error.305 | cannot use operator[] with string | The @ref operator[] member functions can only be executed for certain JSON types.
+json.exception.type_error.306 | cannot use value() with string | The @ref value() member functions can only be executed for certain JSON types.
+json.exception.type_error.307 | cannot use erase() with string | The @ref erase() member functions can only be executed for certain JSON types.
+json.exception.type_error.308 | cannot use push_back() with string | The @ref push_back() and @ref operator+= member functions can only be executed for certain JSON types.
+json.exception.type_error.309 | cannot use insert() with | The @ref insert() member functions can only be executed for certain JSON types.
+json.exception.type_error.310 | cannot use swap() with number | The @ref swap() member functions can only be executed for certain JSON types.
+json.exception.type_error.311 | cannot use emplace_back() with string | The @ref emplace_back() member function can only be executed for certain JSON types.
+json.exception.type_error.312 | cannot use update() with string | The @ref update() member functions can only be executed for certain JSON types.
+json.exception.type_error.313 | invalid value to unflatten | The @ref unflatten function converts an object whose keys are JSON Pointers back into an arbitrary nested JSON value. The JSON Pointers must not overlap, because then the resulting value would not be well defined.
+json.exception.type_error.314 | only objects can be unflattened | The @ref unflatten function only works for an object whose keys are JSON Pointers.
+json.exception.type_error.315 | values in object must be primitive | The @ref unflatten function only works for an object whose keys are JSON Pointers and whose values are primitive.
+json.exception.type_error.316 | invalid UTF-8 byte at index 10: 0x7E | The @ref dump function only works with UTF-8 encoded strings; that is, if you assign a `std::string` to a JSON value, make sure it is UTF-8 encoded. |
+json.exception.type_error.317 | JSON value cannot be serialized to requested format | The dynamic type of the object cannot be represented in the requested serialization format (e.g. a raw `true` or `null` JSON object cannot be serialized to BSON) |
+
+@liveexample{The following code shows how a `type_error` exception can be
+caught.,type_error}
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref other_error for exceptions indicating other library errors
+
+@since version 3.0.0
+*/
+class type_error : public exception
+{
+  public:
+    template<typename BasicJsonType>
+    static type_error create(int id_, const std::string& what_arg, const BasicJsonType& context)
+    {
+        std::string w = exception::name("type_error", id_) + exception::diagnostics(context) + what_arg;
+        return type_error(id_, w.c_str());
+    }
+
+  private:
+    JSON_HEDLEY_NON_NULL(3)
+    type_error(int id_, const char* what_arg) : exception(id_, what_arg) {}
+};
+
+/*!
+@brief exception indicating access out of the defined range
+
+This exception is thrown in case a library function is called on an input
+parameter that exceeds the expected range, for instance in case of array
+indices or nonexisting object keys.
+
+Exceptions have ids 4xx.
+
+name / id                       | example message | description
+------------------------------- | --------------- | -------------------------
+json.exception.out_of_range.401 | array index 3 is out of range | The provided array index @a i is larger than @a size-1.
+json.exception.out_of_range.402 | array index '-' (3) is out of range | The special array index `-` in a JSON Pointer never describes a valid element of the array, but the index past the end. That is, it can only be used to add elements at this position, but not to read it.
+json.exception.out_of_range.403 | key 'foo' not found | The provided key was not found in the JSON object.
+json.exception.out_of_range.404 | unresolved reference token 'foo' | A reference token in a JSON Pointer could not be resolved.
+json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch operations 'remove' and 'add' can not be applied to the root element of the JSON value.
+json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF.
+json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. (until version 3.8.0) |
+json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. |
+json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 (at byte 2) | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string |
+
+@liveexample{The following code shows how an `out_of_range` exception can be
+caught.,out_of_range}
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref type_error for exceptions indicating executing a member function with
+                    a wrong type
+@sa - @ref other_error for exceptions indicating other library errors
+
+@since version 3.0.0
+*/
+class out_of_range : public exception
+{
+  public:
+    template<typename BasicJsonType>
+    static out_of_range create(int id_, const std::string& what_arg, const BasicJsonType& context)
+    {
+        std::string w = exception::name("out_of_range", id_) + exception::diagnostics(context) + what_arg;
+        return out_of_range(id_, w.c_str());
+    }
+
+  private:
+    JSON_HEDLEY_NON_NULL(3)
+    out_of_range(int id_, const char* what_arg) : exception(id_, what_arg) {}
+};
+
+/*!
+@brief exception indicating other library errors
+
+This exception is thrown in case of errors that cannot be classified with the
+other exception types.
+
+Exceptions have ids 5xx.
+
+name / id                      | example message | description
+------------------------------ | --------------- | -------------------------
+json.exception.other_error.501 | unsuccessful: {"op":"test","path":"/baz", "value":"bar"} | A JSON Patch operation 'test' failed. The unsuccessful operation is also printed.
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref type_error for exceptions indicating executing a member function with
+                    a wrong type
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+
+@liveexample{The following code shows how an `other_error` exception can be
+caught.,other_error}
+
+@since version 3.0.0
+*/
+class other_error : public exception
+{
+  public:
+    template<typename BasicJsonType>
+    static other_error create(int id_, const std::string& what_arg, const BasicJsonType& context)
+    {
+        std::string w = exception::name("other_error", id_) + exception::diagnostics(context) + what_arg;
+        return other_error(id_, w.c_str());
+    }
+
+  private:
+    JSON_HEDLEY_NON_NULL(3)
+    other_error(int id_, const char* what_arg) : exception(id_, what_arg) {}
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+
+#include <cstddef> // size_t
+#include <type_traits> // conditional, enable_if, false_type, integral_constant, is_constructible, is_integral, is_same, remove_cv, remove_reference, true_type
+#include <utility> // index_sequence, make_index_sequence, index_sequence_for
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+
+template<typename T>
+using uncvref_t = typename std::remove_cv<typename std::remove_reference<T>::type>::type;
+
+#ifdef JSON_HAS_CPP_14
+
+// the following utilities are natively available in C++14
+using std::enable_if_t;
+using std::index_sequence;
+using std::make_index_sequence;
+using std::index_sequence_for;
+
+#else
+
+// alias templates to reduce boilerplate
+template<bool B, typename T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
+
+// The following code is taken from https://github.com/abseil/abseil-cpp/blob/10cb35e459f5ecca5b2ff107635da0bfa41011b4/absl/utility/utility.h
+// which is part of Google Abseil (https://github.com/abseil/abseil-cpp), licensed under the Apache License 2.0.
+
+//// START OF CODE FROM GOOGLE ABSEIL
+
+// integer_sequence
+//
+// Class template representing a compile-time integer sequence. An instantiation
+// of `integer_sequence<T, Ints...>` has a sequence of integers encoded in its
+// type through its template arguments (which is a common need when
+// working with C++11 variadic templates). `absl::integer_sequence` is designed
+// to be a drop-in replacement for C++14's `std::integer_sequence`.
+//
+// Example:
+//
+//   template< class T, T... Ints >
+//   void user_function(integer_sequence<T, Ints...>);
+//
+//   int main()
+//   {
+//     // user_function's `T` will be deduced to `int` and `Ints...`
+//     // will be deduced to `0, 1, 2, 3, 4`.
+//     user_function(make_integer_sequence<int, 5>());
+//   }
+template <typename T, T... Ints>
+struct integer_sequence
+{
+    using value_type = T;
+    static constexpr std::size_t size() noexcept
+    {
+        return sizeof...(Ints);
+    }
+};
+
+// index_sequence
+//
+// A helper template for an `integer_sequence` of `size_t`,
+// `absl::index_sequence` is designed to be a drop-in replacement for C++14's
+// `std::index_sequence`.
+template <size_t... Ints>
+using index_sequence = integer_sequence<size_t, Ints...>;
+
+namespace utility_internal
+{
+
+template <typename Seq, size_t SeqSize, size_t Rem>
+struct Extend;
+
+// Note that SeqSize == sizeof...(Ints). It's passed explicitly for efficiency.
+template <typename T, T... Ints, size_t SeqSize>
+struct Extend<integer_sequence<T, Ints...>, SeqSize, 0>
+{
+    using type = integer_sequence < T, Ints..., (Ints + SeqSize)... >;
+};
+
+template <typename T, T... Ints, size_t SeqSize>
+struct Extend<integer_sequence<T, Ints...>, SeqSize, 1>
+{
+    using type = integer_sequence < T, Ints..., (Ints + SeqSize)..., 2 * SeqSize >;
+};
+
+// Recursion helper for 'make_integer_sequence<T, N>'.
+// 'Gen<T, N>::type' is an alias for 'integer_sequence<T, 0, 1, ... N-1>'.
+template <typename T, size_t N>
+struct Gen
+{
+    using type =
+        typename Extend < typename Gen < T, N / 2 >::type, N / 2, N % 2 >::type;
+};
+
+template <typename T>
+struct Gen<T, 0>
+{
+    using type = integer_sequence<T>;
+};
+
+}  // namespace utility_internal
+
+// Compile-time sequences of integers
+
+// make_integer_sequence
+//
+// This template alias is equivalent to
+// `integer_sequence<int, 0, 1, ..., N-1>`, and is designed to be a drop-in
+// replacement for C++14's `std::make_integer_sequence`.
+template <typename T, T N>
+using make_integer_sequence = typename utility_internal::Gen<T, N>::type;
+
+// make_index_sequence
+//
+// This template alias is equivalent to `index_sequence<0, 1, ..., N-1>`,
+// and is designed to be a drop-in replacement for C++14's
+// `std::make_index_sequence`.
+template <size_t N>
+using make_index_sequence = make_integer_sequence<size_t, N>;
+
+// index_sequence_for
+//
+// Converts a typename pack into an index sequence of the same length, and
+// is designed to be a drop-in replacement for C++14's
+// `std::index_sequence_for()`
+template <typename... Ts>
+using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
+
+//// END OF CODE FROM GOOGLE ABSEIL
+
+#endif
+
+// dispatch utility (taken from ranges-v3)
+template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
+template<> struct priority_tag<0> {};
+
+// taken from ranges-v3
+template<typename T>
+struct static_const
+{
+    static constexpr T value{};
+};
+
+template<typename T>
+constexpr T static_const<T>::value;
+
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/meta/identity_tag.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+// dispatching helper struct
+template <class T> struct identity_tag {};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+
+#include <limits> // numeric_limits
+#include <type_traits> // false_type, is_constructible, is_integral, is_same, true_type
+#include <utility> // declval
+#include <tuple> // tuple
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+// #include <nlohmann/detail/iterators/iterator_traits.hpp>
+
+
+#include <iterator> // random_access_iterator_tag
+
+// #include <nlohmann/detail/meta/void_t.hpp>
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename It, typename = void>
+struct iterator_types {};
+
+template<typename It>
+struct iterator_types <
+    It,
+    void_t<typename It::difference_type, typename It::value_type, typename It::pointer,
+    typename It::reference, typename It::iterator_category >>
+{
+    using difference_type = typename It::difference_type;
+    using value_type = typename It::value_type;
+    using pointer = typename It::pointer;
+    using reference = typename It::reference;
+    using iterator_category = typename It::iterator_category;
+};
+
+// This is required as some compilers implement std::iterator_traits in a way that
+// doesn't work with SFINAE. See https://github.com/nlohmann/json/issues/1341.
+template<typename T, typename = void>
+struct iterator_traits
+{
+};
+
+template<typename T>
+struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
+            : iterator_types<T>
+{
+};
+
+template<typename T>
+struct iterator_traits<T*, enable_if_t<std::is_object<T>::value>>
+{
+    using iterator_category = std::random_access_iterator_tag;
+    using value_type = T;
+    using difference_type = ptrdiff_t;
+    using pointer = T*;
+    using reference = T&;
+};
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/meta/call_std/begin.hpp>
+
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+NLOHMANN_CAN_CALL_STD_FUNC_IMPL(begin);
+} // namespace nlohmann
+
+// #include <nlohmann/detail/meta/call_std/end.hpp>
+
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+NLOHMANN_CAN_CALL_STD_FUNC_IMPL(end);
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/detected.hpp>
+
+// #include <nlohmann/json_fwd.hpp>
+#ifndef INCLUDE_NLOHMANN_JSON_FWD_HPP_
+#define INCLUDE_NLOHMANN_JSON_FWD_HPP_
+
+#include <cstdint> // int64_t, uint64_t
+#include <map> // map
+#include <memory> // allocator
+#include <string> // string
+#include <vector> // vector
+
+/*!
+@brief namespace for Niels Lohmann
+@see https://github.com/nlohmann
+@since version 1.0.0
+*/
+namespace nlohmann
+{
+/*!
+@brief default JSONSerializer template argument
+
+This serializer ignores the template arguments and uses ADL
+([argument-dependent lookup](https://en.cppreference.com/w/cpp/language/adl))
+for serialization.
+*/
+template<typename T = void, typename SFINAE = void>
+struct adl_serializer;
+
+template<template<typename U, typename V, typename... Args> class ObjectType =
+         std::map,
+         template<typename U, typename... Args> class ArrayType = std::vector,
+         class StringType = std::string, class BooleanType = bool,
+         class NumberIntegerType = std::int64_t,
+         class NumberUnsignedType = std::uint64_t,
+         class NumberFloatType = double,
+         template<typename U> class AllocatorType = std::allocator,
+         template<typename T, typename SFINAE = void> class JSONSerializer =
+         adl_serializer,
+         class BinaryType = std::vector<std::uint8_t>>
+class basic_json;
+
+/*!
+@brief JSON Pointer
+
+A JSON pointer defines a string syntax for identifying a specific value
+within a JSON document. It can be used with functions `at` and
+`operator[]`. Furthermore, JSON pointers are the base for JSON patches.
+
+@sa [RFC 6901](https://tools.ietf.org/html/rfc6901)
+
+@since version 2.0.0
+*/
+template<typename BasicJsonType>
+class json_pointer;
+
+/*!
+@brief default JSON class
+
+This type is the default specialization of the @ref basic_json class which
+uses the standard template types.
+
+@since version 1.0.0
+*/
+using json = basic_json<>;
+
+template<class Key, class T, class IgnoredLess, class Allocator>
+struct ordered_map;
+
+/*!
+@brief ordered JSON class
+
+This type preserves the insertion order of object keys.
+
+@since version 3.9.0
+*/
+using ordered_json = basic_json<nlohmann::ordered_map>;
+
+}  // namespace nlohmann
+
+#endif  // INCLUDE_NLOHMANN_JSON_FWD_HPP_
+
+
+namespace nlohmann
+{
+/*!
+@brief detail namespace with internal helper functions
+
+This namespace collects functions that should not be exposed,
+implementations of some @ref basic_json methods, and meta-programming helpers.
+
+@since version 2.1.0
+*/
+namespace detail
+{
+/////////////
+// helpers //
+/////////////
+
+// Note to maintainers:
+//
+// Every trait in this file expects a non CV-qualified type.
+// The only exceptions are in the 'aliases for detected' section
+// (i.e. those of the form: decltype(T::member_function(std::declval<T>())))
+//
+// In this case, T has to be properly CV-qualified to constraint the function arguments
+// (e.g. to_json(BasicJsonType&, const T&))
+
+template<typename> struct is_basic_json : std::false_type {};
+
+NLOHMANN_BASIC_JSON_TPL_DECLARATION
+struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
+
+//////////////////////
+// json_ref helpers //
+//////////////////////
+
+template<typename>
+class json_ref;
+
+template<typename>
+struct is_json_ref : std::false_type {};
+
+template<typename T>
+struct is_json_ref<json_ref<T>> : std::true_type {};
+
+//////////////////////////
+// aliases for detected //
+//////////////////////////
+
+template<typename T>
+using mapped_type_t = typename T::mapped_type;
+
+template<typename T>
+using key_type_t = typename T::key_type;
+
+template<typename T>
+using value_type_t = typename T::value_type;
+
+template<typename T>
+using difference_type_t = typename T::difference_type;
+
+template<typename T>
+using pointer_t = typename T::pointer;
+
+template<typename T>
+using reference_t = typename T::reference;
+
+template<typename T>
+using iterator_category_t = typename T::iterator_category;
+
+template<typename T, typename... Args>
+using to_json_function = decltype(T::to_json(std::declval<Args>()...));
+
+template<typename T, typename... Args>
+using from_json_function = decltype(T::from_json(std::declval<Args>()...));
+
+template<typename T, typename U>
+using get_template_function = decltype(std::declval<T>().template get<U>());
+
+// trait checking if JSONSerializer<T>::from_json(json const&, udt&) exists
+template<typename BasicJsonType, typename T, typename = void>
+struct has_from_json : std::false_type {};
+
+// trait checking if j.get<T> is valid
+// use this trait instead of std::is_constructible or std::is_convertible,
+// both rely on, or make use of implicit conversions, and thus fail when T
+// has several constructors/operator= (see https://github.com/nlohmann/json/issues/958)
+template <typename BasicJsonType, typename T>
+struct is_getable
+{
+    static constexpr bool value = is_detected<get_template_function, const BasicJsonType&, T>::value;
+};
+
+template<typename BasicJsonType, typename T>
+struct has_from_json < BasicJsonType, T, enable_if_t < !is_basic_json<T>::value >>
+{
+    using serializer = typename BasicJsonType::template json_serializer<T, void>;
+
+    static constexpr bool value =
+        is_detected_exact<void, from_json_function, serializer,
+        const BasicJsonType&, T&>::value;
+};
+
+// This trait checks if JSONSerializer<T>::from_json(json const&) exists
+// this overload is used for non-default-constructible user-defined-types
+template<typename BasicJsonType, typename T, typename = void>
+struct has_non_default_from_json : std::false_type {};
+
+template<typename BasicJsonType, typename T>
+struct has_non_default_from_json < BasicJsonType, T, enable_if_t < !is_basic_json<T>::value >>
+{
+    using serializer = typename BasicJsonType::template json_serializer<T, void>;
+
+    static constexpr bool value =
+        is_detected_exact<T, from_json_function, serializer,
+        const BasicJsonType&>::value;
+};
+
+// This trait checks if BasicJsonType::json_serializer<T>::to_json exists
+// Do not evaluate the trait when T is a basic_json type, to avoid template instantiation infinite recursion.
+template<typename BasicJsonType, typename T, typename = void>
+struct has_to_json : std::false_type {};
+
+template<typename BasicJsonType, typename T>
+struct has_to_json < BasicJsonType, T, enable_if_t < !is_basic_json<T>::value >>
+{
+    using serializer = typename BasicJsonType::template json_serializer<T, void>;
+
+    static constexpr bool value =
+        is_detected_exact<void, to_json_function, serializer, BasicJsonType&,
+        T>::value;
+};
+
+
+///////////////////
+// is_ functions //
+///////////////////
+
+// https://en.cppreference.com/w/cpp/types/conjunction
+template<class...> struct conjunction : std::true_type { };
+template<class B1> struct conjunction<B1> : B1 { };
+template<class B1, class... Bn>
+struct conjunction<B1, Bn...>
+: std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
+
+// https://en.cppreference.com/w/cpp/types/negation
+template<class B> struct negation : std::integral_constant < bool, !B::value > { };
+
+// Reimplementation of is_constructible and is_default_constructible, due to them being broken for
+// std::pair and std::tuple until LWG 2367 fix (see https://cplusplus.github.io/LWG/lwg-defects.html#2367).
+// This causes compile errors in e.g. clang 3.5 or gcc 4.9.
+template <typename T>
+struct is_default_constructible : std::is_default_constructible<T> {};
+
+template <typename T1, typename T2>
+struct is_default_constructible<std::pair<T1, T2>>
+            : conjunction<is_default_constructible<T1>, is_default_constructible<T2>> {};
+
+template <typename T1, typename T2>
+struct is_default_constructible<const std::pair<T1, T2>>
+            : conjunction<is_default_constructible<T1>, is_default_constructible<T2>> {};
+
+template <typename... Ts>
+struct is_default_constructible<std::tuple<Ts...>>
+            : conjunction<is_default_constructible<Ts>...> {};
+
+template <typename... Ts>
+struct is_default_constructible<const std::tuple<Ts...>>
+            : conjunction<is_default_constructible<Ts>...> {};
+
+
+template <typename T, typename... Args>
+struct is_constructible : std::is_constructible<T, Args...> {};
+
+template <typename T1, typename T2>
+struct is_constructible<std::pair<T1, T2>> : is_default_constructible<std::pair<T1, T2>> {};
+
+template <typename T1, typename T2>
+struct is_constructible<const std::pair<T1, T2>> : is_default_constructible<const std::pair<T1, T2>> {};
+
+template <typename... Ts>
+struct is_constructible<std::tuple<Ts...>> : is_default_constructible<std::tuple<Ts...>> {};
+
+template <typename... Ts>
+struct is_constructible<const std::tuple<Ts...>> : is_default_constructible<const std::tuple<Ts...>> {};
+
+
+template<typename T, typename = void>
+struct is_iterator_traits : std::false_type {};
+
+template<typename T>
+struct is_iterator_traits<iterator_traits<T>>
+{
+  private:
+    using traits = iterator_traits<T>;
+
+  public:
+    static constexpr auto value =
+        is_detected<value_type_t, traits>::value &&
+        is_detected<difference_type_t, traits>::value &&
+        is_detected<pointer_t, traits>::value &&
+        is_detected<iterator_category_t, traits>::value &&
+        is_detected<reference_t, traits>::value;
+};
+
+template<typename T>
+struct is_range
+{
+  private:
+    using t_ref = typename std::add_lvalue_reference<T>::type;
+
+    using iterator = detected_t<result_of_begin, t_ref>;
+    using sentinel = detected_t<result_of_end, t_ref>;
+
+    // to be 100% correct, it should use https://en.cppreference.com/w/cpp/iterator/input_or_output_iterator
+    // and https://en.cppreference.com/w/cpp/iterator/sentinel_for
+    // but reimplementing these would be too much work, as a lot of other concepts are used underneath
+    static constexpr auto is_iterator_begin =
+        is_iterator_traits<iterator_traits<iterator>>::value;
+
+  public:
+    static constexpr bool value = !std::is_same<iterator, nonesuch>::value && !std::is_same<sentinel, nonesuch>::value && is_iterator_begin;
+};
+
+template<typename R>
+using iterator_t = enable_if_t<is_range<R>::value, result_of_begin<decltype(std::declval<R&>())>>;
+
+template<typename T>
+using range_value_t = value_type_t<iterator_traits<iterator_t<T>>>;
+
+// The following implementation of is_complete_type is taken from
+// https://blogs.msdn.microsoft.com/vcblog/2015/12/02/partial-support-for-expression-sfinae-in-vs-2015-update-1/
+// and is written by Xiang Fan who agreed to using it in this library.
+
+template<typename T, typename = void>
+struct is_complete_type : std::false_type {};
+
+template<typename T>
+struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
+
+template<typename BasicJsonType, typename CompatibleObjectType,
+         typename = void>
+struct is_compatible_object_type_impl : std::false_type {};
+
+template<typename BasicJsonType, typename CompatibleObjectType>
+struct is_compatible_object_type_impl <
+    BasicJsonType, CompatibleObjectType,
+    enable_if_t < is_detected<mapped_type_t, CompatibleObjectType>::value&&
+    is_detected<key_type_t, CompatibleObjectType>::value >>
+{
+    using object_t = typename BasicJsonType::object_t;
+
+    // macOS's is_constructible does not play well with nonesuch...
+    static constexpr bool value =
+        is_constructible<typename object_t::key_type,
+        typename CompatibleObjectType::key_type>::value &&
+        is_constructible<typename object_t::mapped_type,
+        typename CompatibleObjectType::mapped_type>::value;
+};
+
+template<typename BasicJsonType, typename CompatibleObjectType>
+struct is_compatible_object_type
+    : is_compatible_object_type_impl<BasicJsonType, CompatibleObjectType> {};
+
+template<typename BasicJsonType, typename ConstructibleObjectType,
+         typename = void>
+struct is_constructible_object_type_impl : std::false_type {};
+
+template<typename BasicJsonType, typename ConstructibleObjectType>
+struct is_constructible_object_type_impl <
+    BasicJsonType, ConstructibleObjectType,
+    enable_if_t < is_detected<mapped_type_t, ConstructibleObjectType>::value&&
+    is_detected<key_type_t, ConstructibleObjectType>::value >>
+{
+    using object_t = typename BasicJsonType::object_t;
+
+    static constexpr bool value =
+        (is_default_constructible<ConstructibleObjectType>::value &&
+         (std::is_move_assignable<ConstructibleObjectType>::value ||
+          std::is_copy_assignable<ConstructibleObjectType>::value) &&
+         (is_constructible<typename ConstructibleObjectType::key_type,
+          typename object_t::key_type>::value &&
+          std::is_same <
+          typename object_t::mapped_type,
+          typename ConstructibleObjectType::mapped_type >::value)) ||
+        (has_from_json<BasicJsonType,
+         typename ConstructibleObjectType::mapped_type>::value ||
+         has_non_default_from_json <
+         BasicJsonType,
+         typename ConstructibleObjectType::mapped_type >::value);
+};
+
+template<typename BasicJsonType, typename ConstructibleObjectType>
+struct is_constructible_object_type
+    : is_constructible_object_type_impl<BasicJsonType,
+      ConstructibleObjectType> {};
+
+template<typename BasicJsonType, typename CompatibleStringType>
+struct is_compatible_string_type
+{
+    static constexpr auto value =
+        is_constructible<typename BasicJsonType::string_t, CompatibleStringType>::value;
+};
+
+template<typename BasicJsonType, typename ConstructibleStringType>
+struct is_constructible_string_type
+{
+    static constexpr auto value =
+        is_constructible<ConstructibleStringType,
+        typename BasicJsonType::string_t>::value;
+};
+
+template<typename BasicJsonType, typename CompatibleArrayType, typename = void>
+struct is_compatible_array_type_impl : std::false_type {};
+
+template<typename BasicJsonType, typename CompatibleArrayType>
+struct is_compatible_array_type_impl <
+    BasicJsonType, CompatibleArrayType,
+    enable_if_t <
+    is_detected<iterator_t, CompatibleArrayType>::value&&
+    is_iterator_traits<iterator_traits<detected_t<iterator_t, CompatibleArrayType>>>::value&&
+// special case for types like std::filesystem::path whose iterator's value_type are themselves
+// c.f. https://github.com/nlohmann/json/pull/3073
+    !std::is_same<CompatibleArrayType, detected_t<range_value_t, CompatibleArrayType>>::value >>
+{
+    static constexpr bool value =
+        is_constructible<BasicJsonType,
+        range_value_t<CompatibleArrayType>>::value;
+};
+
+template<typename BasicJsonType, typename CompatibleArrayType>
+struct is_compatible_array_type
+    : is_compatible_array_type_impl<BasicJsonType, CompatibleArrayType> {};
+
+template<typename BasicJsonType, typename ConstructibleArrayType, typename = void>
+struct is_constructible_array_type_impl : std::false_type {};
+
+template<typename BasicJsonType, typename ConstructibleArrayType>
+struct is_constructible_array_type_impl <
+    BasicJsonType, ConstructibleArrayType,
+    enable_if_t<std::is_same<ConstructibleArrayType,
+    typename BasicJsonType::value_type>::value >>
+            : std::true_type {};
+
+template<typename BasicJsonType, typename ConstructibleArrayType>
+struct is_constructible_array_type_impl <
+    BasicJsonType, ConstructibleArrayType,
+    enable_if_t < !std::is_same<ConstructibleArrayType,
+    typename BasicJsonType::value_type>::value&&
+    !is_compatible_string_type<BasicJsonType, ConstructibleArrayType>::value&&
+    is_default_constructible<ConstructibleArrayType>::value&&
+(std::is_move_assignable<ConstructibleArrayType>::value ||
+ std::is_copy_assignable<ConstructibleArrayType>::value)&&
+is_detected<iterator_t, ConstructibleArrayType>::value&&
+is_iterator_traits<iterator_traits<detected_t<iterator_t, ConstructibleArrayType>>>::value&&
+is_detected<range_value_t, ConstructibleArrayType>::value&&
+// special case for types like std::filesystem::path whose iterator's value_type are themselves
+// c.f. https://github.com/nlohmann/json/pull/3073
+!std::is_same<ConstructibleArrayType, detected_t<range_value_t, ConstructibleArrayType>>::value&&
+        is_complete_type <
+        detected_t<range_value_t, ConstructibleArrayType >>::value >>
+{
+    using value_type = range_value_t<ConstructibleArrayType>;
+
+    static constexpr bool value =
+        std::is_same<value_type,
+        typename BasicJsonType::array_t::value_type>::value ||
+        has_from_json<BasicJsonType,
+        value_type>::value ||
+        has_non_default_from_json <
+        BasicJsonType,
+        value_type >::value;
+};
+
+template<typename BasicJsonType, typename ConstructibleArrayType>
+struct is_constructible_array_type
+    : is_constructible_array_type_impl<BasicJsonType, ConstructibleArrayType> {};
+
+template<typename RealIntegerType, typename CompatibleNumberIntegerType,
+         typename = void>
+struct is_compatible_integer_type_impl : std::false_type {};
+
+template<typename RealIntegerType, typename CompatibleNumberIntegerType>
+struct is_compatible_integer_type_impl <
+    RealIntegerType, CompatibleNumberIntegerType,
+    enable_if_t < std::is_integral<RealIntegerType>::value&&
+    std::is_integral<CompatibleNumberIntegerType>::value&&
+    !std::is_same<bool, CompatibleNumberIntegerType>::value >>
+{
+    // is there an assert somewhere on overflows?
+    using RealLimits = std::numeric_limits<RealIntegerType>;
+    using CompatibleLimits = std::numeric_limits<CompatibleNumberIntegerType>;
+
+    static constexpr auto value =
+        is_constructible<RealIntegerType,
+        CompatibleNumberIntegerType>::value &&
+        CompatibleLimits::is_integer &&
+        RealLimits::is_signed == CompatibleLimits::is_signed;
+};
+
+template<typename RealIntegerType, typename CompatibleNumberIntegerType>
+struct is_compatible_integer_type
+    : is_compatible_integer_type_impl<RealIntegerType,
+      CompatibleNumberIntegerType> {};
+
+template<typename BasicJsonType, typename CompatibleType, typename = void>
+struct is_compatible_type_impl: std::false_type {};
+
+template<typename BasicJsonType, typename CompatibleType>
+struct is_compatible_type_impl <
+    BasicJsonType, CompatibleType,
+    enable_if_t<is_complete_type<CompatibleType>::value >>
+{
+    static constexpr bool value =
+        has_to_json<BasicJsonType, CompatibleType>::value;
+};
+
+template<typename BasicJsonType, typename CompatibleType>
+struct is_compatible_type
+    : is_compatible_type_impl<BasicJsonType, CompatibleType> {};
+
+template<typename T1, typename T2>
+struct is_constructible_tuple : std::false_type {};
+
+template<typename T1, typename... Args>
+struct is_constructible_tuple<T1, std::tuple<Args...>> : conjunction<is_constructible<T1, Args>...> {};
+
+// a naive helper to check if a type is an ordered_map (exploits the fact that
+// ordered_map inherits capacity() from std::vector)
+template <typename T>
+struct is_ordered_map
+{
+    using one = char;
+
+    struct two
+    {
+        char x[2]; // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+    };
+
+    template <typename C> static one test( decltype(&C::capacity) ) ;
+    template <typename C> static two test(...);
+
+    enum { value = sizeof(test<T>(nullptr)) == sizeof(char) }; // NOLINT(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+};
+
+// to avoid useless casts (see https://github.com/nlohmann/json/issues/2893#issuecomment-889152324)
+template < typename T, typename U, enable_if_t < !std::is_same<T, U>::value, int > = 0 >
+T conditional_static_cast(U value)
+{
+    return static_cast<T>(value);
+}
+
+template<typename T, typename U, enable_if_t<std::is_same<T, U>::value, int> = 0>
+T conditional_static_cast(U value)
+{
+    return value;
+}
+
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+#ifdef JSON_HAS_CPP_17
+    #include <filesystem>
+#endif
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_null()))
+    {
+        JSON_THROW(type_error::create(302, "type must be null, but is " + std::string(j.type_name()), j));
+    }
+    n = nullptr;
+}
+
+// overloads for basic_json template parameters
+template < typename BasicJsonType, typename ArithmeticType,
+           enable_if_t < std::is_arithmetic<ArithmeticType>::value&&
+                         !std::is_same<ArithmeticType, typename BasicJsonType::boolean_t>::value,
+                         int > = 0 >
+void get_arithmetic_value(const BasicJsonType& j, ArithmeticType& val)
+{
+    switch (static_cast<value_t>(j))
+    {
+        case value_t::number_unsigned:
+        {
+            val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_unsigned_t*>());
+            break;
+        }
+        case value_t::number_integer:
+        {
+            val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_integer_t*>());
+            break;
+        }
+        case value_t::number_float:
+        {
+            val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_float_t*>());
+            break;
+        }
+
+        case value_t::null:
+        case value_t::object:
+        case value_t::array:
+        case value_t::string:
+        case value_t::boolean:
+        case value_t::binary:
+        case value_t::discarded:
+        default:
+            JSON_THROW(type_error::create(302, "type must be number, but is " + std::string(j.type_name()), j));
+    }
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::boolean_t& b)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_boolean()))
+    {
+        JSON_THROW(type_error::create(302, "type must be boolean, but is " + std::string(j.type_name()), j));
+    }
+    b = *j.template get_ptr<const typename BasicJsonType::boolean_t*>();
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::string_t& s)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_string()))
+    {
+        JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name()), j));
+    }
+    s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
+}
+
+template <
+    typename BasicJsonType, typename ConstructibleStringType,
+    enable_if_t <
+        is_constructible_string_type<BasicJsonType, ConstructibleStringType>::value&&
+        !std::is_same<typename BasicJsonType::string_t,
+                      ConstructibleStringType>::value,
+        int > = 0 >
+void from_json(const BasicJsonType& j, ConstructibleStringType& s)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_string()))
+    {
+        JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name()), j));
+    }
+
+    s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::number_float_t& val)
+{
+    get_arithmetic_value(j, val);
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::number_unsigned_t& val)
+{
+    get_arithmetic_value(j, val);
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::number_integer_t& val)
+{
+    get_arithmetic_value(j, val);
+}
+
+template<typename BasicJsonType, typename EnumType,
+         enable_if_t<std::is_enum<EnumType>::value, int> = 0>
+void from_json(const BasicJsonType& j, EnumType& e)
+{
+    typename std::underlying_type<EnumType>::type val;
+    get_arithmetic_value(j, val);
+    e = static_cast<EnumType>(val);
+}
+
+// forward_list doesn't have an insert method
+template<typename BasicJsonType, typename T, typename Allocator,
+         enable_if_t<is_getable<BasicJsonType, T>::value, int> = 0>
+void from_json(const BasicJsonType& j, std::forward_list<T, Allocator>& l)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name()), j));
+    }
+    l.clear();
+    std::transform(j.rbegin(), j.rend(),
+                   std::front_inserter(l), [](const BasicJsonType & i)
+    {
+        return i.template get<T>();
+    });
+}
+
+// valarray doesn't have an insert method
+template<typename BasicJsonType, typename T,
+         enable_if_t<is_getable<BasicJsonType, T>::value, int> = 0>
+void from_json(const BasicJsonType& j, std::valarray<T>& l)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name()), j));
+    }
+    l.resize(j.size());
+    std::transform(j.begin(), j.end(), std::begin(l),
+                   [](const BasicJsonType & elem)
+    {
+        return elem.template get<T>();
+    });
+}
+
+template<typename BasicJsonType, typename T, std::size_t N>
+auto from_json(const BasicJsonType& j, T (&arr)[N])  // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+-> decltype(j.template get<T>(), void())
+{
+    for (std::size_t i = 0; i < N; ++i)
+    {
+        arr[i] = j.at(i).template get<T>();
+    }
+}
+
+template<typename BasicJsonType>
+void from_json_array_impl(const BasicJsonType& j, typename BasicJsonType::array_t& arr, priority_tag<3> /*unused*/)
+{
+    arr = *j.template get_ptr<const typename BasicJsonType::array_t*>();
+}
+
+template<typename BasicJsonType, typename T, std::size_t N>
+auto from_json_array_impl(const BasicJsonType& j, std::array<T, N>& arr,
+                          priority_tag<2> /*unused*/)
+-> decltype(j.template get<T>(), void())
+{
+    for (std::size_t i = 0; i < N; ++i)
+    {
+        arr[i] = j.at(i).template get<T>();
+    }
+}
+
+template<typename BasicJsonType, typename ConstructibleArrayType,
+         enable_if_t<
+             std::is_assignable<ConstructibleArrayType&, ConstructibleArrayType>::value,
+             int> = 0>
+auto from_json_array_impl(const BasicJsonType& j, ConstructibleArrayType& arr, priority_tag<1> /*unused*/)
+-> decltype(
+    arr.reserve(std::declval<typename ConstructibleArrayType::size_type>()),
+    j.template get<typename ConstructibleArrayType::value_type>(),
+    void())
+{
+    using std::end;
+
+    ConstructibleArrayType ret;
+    ret.reserve(j.size());
+    std::transform(j.begin(), j.end(),
+                   std::inserter(ret, end(ret)), [](const BasicJsonType & i)
+    {
+        // get<BasicJsonType>() returns *this, this won't call a from_json
+        // method when value_type is BasicJsonType
+        return i.template get<typename ConstructibleArrayType::value_type>();
+    });
+    arr = std::move(ret);
+}
+
+template<typename BasicJsonType, typename ConstructibleArrayType,
+         enable_if_t<
+             std::is_assignable<ConstructibleArrayType&, ConstructibleArrayType>::value,
+             int> = 0>
+void from_json_array_impl(const BasicJsonType& j, ConstructibleArrayType& arr,
+                          priority_tag<0> /*unused*/)
+{
+    using std::end;
+
+    ConstructibleArrayType ret;
+    std::transform(
+        j.begin(), j.end(), std::inserter(ret, end(ret)),
+        [](const BasicJsonType & i)
+    {
+        // get<BasicJsonType>() returns *this, this won't call a from_json
+        // method when value_type is BasicJsonType
+        return i.template get<typename ConstructibleArrayType::value_type>();
+    });
+    arr = std::move(ret);
+}
+
+template < typename BasicJsonType, typename ConstructibleArrayType,
+           enable_if_t <
+               is_constructible_array_type<BasicJsonType, ConstructibleArrayType>::value&&
+               !is_constructible_object_type<BasicJsonType, ConstructibleArrayType>::value&&
+               !is_constructible_string_type<BasicJsonType, ConstructibleArrayType>::value&&
+               !std::is_same<ConstructibleArrayType, typename BasicJsonType::binary_t>::value&&
+               !is_basic_json<ConstructibleArrayType>::value,
+               int > = 0 >
+auto from_json(const BasicJsonType& j, ConstructibleArrayType& arr)
+-> decltype(from_json_array_impl(j, arr, priority_tag<3> {}),
+j.template get<typename ConstructibleArrayType::value_type>(),
+void())
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name()), j));
+    }
+
+    from_json_array_impl(j, arr, priority_tag<3> {});
+}
+
+template < typename BasicJsonType, typename T, std::size_t... Idx >
+std::array<T, sizeof...(Idx)> from_json_inplace_array_impl(BasicJsonType&& j,
+        identity_tag<std::array<T, sizeof...(Idx)>> /*unused*/, index_sequence<Idx...> /*unused*/)
+{
+    return { { std::forward<BasicJsonType>(j).at(Idx).template get<T>()... } };
+}
+
+template < typename BasicJsonType, typename T, std::size_t N >
+auto from_json(BasicJsonType&& j, identity_tag<std::array<T, N>> tag)
+-> decltype(from_json_inplace_array_impl(std::forward<BasicJsonType>(j), tag, make_index_sequence<N> {}))
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name()), j));
+    }
+
+    return from_json_inplace_array_impl(std::forward<BasicJsonType>(j), tag, make_index_sequence<N> {});
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::binary_t& bin)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_binary()))
+    {
+        JSON_THROW(type_error::create(302, "type must be binary, but is " + std::string(j.type_name()), j));
+    }
+
+    bin = *j.template get_ptr<const typename BasicJsonType::binary_t*>();
+}
+
+template<typename BasicJsonType, typename ConstructibleObjectType,
+         enable_if_t<is_constructible_object_type<BasicJsonType, ConstructibleObjectType>::value, int> = 0>
+void from_json(const BasicJsonType& j, ConstructibleObjectType& obj)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_object()))
+    {
+        JSON_THROW(type_error::create(302, "type must be object, but is " + std::string(j.type_name()), j));
+    }
+
+    ConstructibleObjectType ret;
+    const auto* inner_object = j.template get_ptr<const typename BasicJsonType::object_t*>();
+    using value_type = typename ConstructibleObjectType::value_type;
+    std::transform(
+        inner_object->begin(), inner_object->end(),
+        std::inserter(ret, ret.begin()),
+        [](typename BasicJsonType::object_t::value_type const & p)
+    {
+        return value_type(p.first, p.second.template get<typename ConstructibleObjectType::mapped_type>());
+    });
+    obj = std::move(ret);
+}
+
+// overload for arithmetic types, not chosen for basic_json template arguments
+// (BooleanType, etc..); note: Is it really necessary to provide explicit
+// overloads for boolean_t etc. in case of a custom BooleanType which is not
+// an arithmetic type?
+template < typename BasicJsonType, typename ArithmeticType,
+           enable_if_t <
+               std::is_arithmetic<ArithmeticType>::value&&
+               !std::is_same<ArithmeticType, typename BasicJsonType::number_unsigned_t>::value&&
+               !std::is_same<ArithmeticType, typename BasicJsonType::number_integer_t>::value&&
+               !std::is_same<ArithmeticType, typename BasicJsonType::number_float_t>::value&&
+               !std::is_same<ArithmeticType, typename BasicJsonType::boolean_t>::value,
+               int > = 0 >
+void from_json(const BasicJsonType& j, ArithmeticType& val)
+{
+    switch (static_cast<value_t>(j))
+    {
+        case value_t::number_unsigned:
+        {
+            val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_unsigned_t*>());
+            break;
+        }
+        case value_t::number_integer:
+        {
+            val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_integer_t*>());
+            break;
+        }
+        case value_t::number_float:
+        {
+            val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_float_t*>());
+            break;
+        }
+        case value_t::boolean:
+        {
+            val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::boolean_t*>());
+            break;
+        }
+
+        case value_t::null:
+        case value_t::object:
+        case value_t::array:
+        case value_t::string:
+        case value_t::binary:
+        case value_t::discarded:
+        default:
+            JSON_THROW(type_error::create(302, "type must be number, but is " + std::string(j.type_name()), j));
+    }
+}
+
+template<typename BasicJsonType, typename... Args, std::size_t... Idx>
+std::tuple<Args...> from_json_tuple_impl_base(BasicJsonType&& j, index_sequence<Idx...> /*unused*/)
+{
+    return std::make_tuple(std::forward<BasicJsonType>(j).at(Idx).template get<Args>()...);
+}
+
+template < typename BasicJsonType, class A1, class A2 >
+std::pair<A1, A2> from_json_tuple_impl(BasicJsonType&& j, identity_tag<std::pair<A1, A2>> /*unused*/, priority_tag<0> /*unused*/)
+{
+    return {std::forward<BasicJsonType>(j).at(0).template get<A1>(),
+            std::forward<BasicJsonType>(j).at(1).template get<A2>()};
+}
+
+template<typename BasicJsonType, typename A1, typename A2>
+void from_json_tuple_impl(BasicJsonType&& j, std::pair<A1, A2>& p, priority_tag<1> /*unused*/)
+{
+    p = from_json_tuple_impl(std::forward<BasicJsonType>(j), identity_tag<std::pair<A1, A2>> {}, priority_tag<0> {});
+}
+
+template<typename BasicJsonType, typename... Args>
+std::tuple<Args...> from_json_tuple_impl(BasicJsonType&& j, identity_tag<std::tuple<Args...>> /*unused*/, priority_tag<2> /*unused*/)
+{
+    return from_json_tuple_impl_base<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
+}
+
+template<typename BasicJsonType, typename... Args>
+void from_json_tuple_impl(BasicJsonType&& j, std::tuple<Args...>& t, priority_tag<3> /*unused*/)
+{
+    t = from_json_tuple_impl_base<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
+}
+
+template<typename BasicJsonType, typename TupleRelated>
+auto from_json(BasicJsonType&& j, TupleRelated&& t)
+-> decltype(from_json_tuple_impl(std::forward<BasicJsonType>(j), std::forward<TupleRelated>(t), priority_tag<3> {}))
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name()), j));
+    }
+
+    return from_json_tuple_impl(std::forward<BasicJsonType>(j), std::forward<TupleRelated>(t), priority_tag<3> {});
+}
+
+template < typename BasicJsonType, typename Key, typename Value, typename Compare, typename Allocator,
+           typename = enable_if_t < !std::is_constructible <
+                                        typename BasicJsonType::string_t, Key >::value >>
+void from_json(const BasicJsonType& j, std::map<Key, Value, Compare, Allocator>& m)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name()), j));
+    }
+    m.clear();
+    for (const auto& p : j)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!p.is_array()))
+        {
+            JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name()), j));
+        }
+        m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+    }
+}
+
+template < typename BasicJsonType, typename Key, typename Value, typename Hash, typename KeyEqual, typename Allocator,
+           typename = enable_if_t < !std::is_constructible <
+                                        typename BasicJsonType::string_t, Key >::value >>
+void from_json(const BasicJsonType& j, std::unordered_map<Key, Value, Hash, KeyEqual, Allocator>& m)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name()), j));
+    }
+    m.clear();
+    for (const auto& p : j)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!p.is_array()))
+        {
+            JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name()), j));
+        }
+        m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+    }
+}
+
+#ifdef JSON_HAS_CPP_17
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, std::filesystem::path& p)
+{
+    if (JSON_HEDLEY_UNLIKELY(!j.is_string()))
+    {
+        JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name()), j));
+    }
+    p = *j.template get_ptr<const typename BasicJsonType::string_t*>();
+}
+#endif
+
+struct from_json_fn
+{
+    template<typename BasicJsonType, typename T>
+    auto operator()(const BasicJsonType& j, T&& val) const
+    noexcept(noexcept(from_json(j, std::forward<T>(val))))
+    -> decltype(from_json(j, std::forward<T>(val)))
+    {
+        return from_json(j, std::forward<T>(val));
+    }
+};
+}  // namespace detail
+
+/// namespace to hold default `from_json` function
+/// to see why this is required:
+/// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
+namespace // NOLINT(cert-dcl59-cpp,fuchsia-header-anon-namespaces,google-build-namespaces)
+{
+constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value; // NOLINT(misc-definitions-in-headers)
+} // namespace
+} // namespace nlohmann
+
+// #include <nlohmann/detail/conversions/to_json.hpp>
+
+
+#include <algorithm> // copy
+#include <iterator> // begin, end
+#include <string> // string
+#include <tuple> // tuple, get
+#include <type_traits> // is_same, is_constructible, is_floating_point, is_enum, underlying_type
+#include <utility> // move, forward, declval, pair
+#include <valarray> // valarray
+#include <vector> // vector
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/iterators/iteration_proxy.hpp>
+
+
+#include <cstddef> // size_t
+#include <iterator> // input_iterator_tag
+#include <string> // string, to_string
+#include <tuple> // tuple_size, get, tuple_element
+#include <utility> // move
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename string_type>
+void int_to_string( string_type& target, std::size_t value )
+{
+    // For ADL
+    using std::to_string;
+    target = to_string(value);
+}
+template<typename IteratorType> class iteration_proxy_value
+{
+  public:
+    using difference_type = std::ptrdiff_t;
+    using value_type = iteration_proxy_value;
+    using pointer = value_type * ;
+    using reference = value_type & ;
+    using iterator_category = std::input_iterator_tag;
+    using string_type = typename std::remove_cv< typename std::remove_reference<decltype( std::declval<IteratorType>().key() ) >::type >::type;
+
+  private:
+    /// the iterator
+    IteratorType anchor;
+    /// an index for arrays (used to create key names)
+    std::size_t array_index = 0;
+    /// last stringified array index
+    mutable std::size_t array_index_last = 0;
+    /// a string representation of the array index
+    mutable string_type array_index_str = "0";
+    /// an empty string (to return a reference for primitive values)
+    const string_type empty_str{};
+
+  public:
+    explicit iteration_proxy_value(IteratorType it) noexcept
+        : anchor(std::move(it))
+    {}
+
+    /// dereference operator (needed for range-based for)
+    iteration_proxy_value& operator*()
+    {
+        return *this;
+    }
+
+    /// increment operator (needed for range-based for)
+    iteration_proxy_value& operator++()
+    {
+        ++anchor;
+        ++array_index;
+
+        return *this;
+    }
+
+    /// equality operator (needed for InputIterator)
+    bool operator==(const iteration_proxy_value& o) const
+    {
+        return anchor == o.anchor;
+    }
+
+    /// inequality operator (needed for range-based for)
+    bool operator!=(const iteration_proxy_value& o) const
+    {
+        return anchor != o.anchor;
+    }
+
+    /// return key of the iterator
+    const string_type& key() const
+    {
+        JSON_ASSERT(anchor.m_object != nullptr);
+
+        switch (anchor.m_object->type())
+        {
+            // use integer array index as key
+            case value_t::array:
+            {
+                if (array_index != array_index_last)
+                {
+                    int_to_string( array_index_str, array_index );
+                    array_index_last = array_index;
+                }
+                return array_index_str;
+            }
+
+            // use key from the object
+            case value_t::object:
+                return anchor.key();
+
+            // use an empty key for all primitive types
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+                return empty_str;
+        }
+    }
+
+    /// return value of the iterator
+    typename IteratorType::reference value() const
+    {
+        return anchor.value();
+    }
+};
+
+/// proxy class for the items() function
+template<typename IteratorType> class iteration_proxy
+{
+  private:
+    /// the container to iterate
+    typename IteratorType::reference container;
+
+  public:
+    /// construct iteration proxy from a container
+    explicit iteration_proxy(typename IteratorType::reference cont) noexcept
+        : container(cont) {}
+
+    /// return iterator begin (needed for range-based for)
+    iteration_proxy_value<IteratorType> begin() noexcept
+    {
+        return iteration_proxy_value<IteratorType>(container.begin());
+    }
+
+    /// return iterator end (needed for range-based for)
+    iteration_proxy_value<IteratorType> end() noexcept
+    {
+        return iteration_proxy_value<IteratorType>(container.end());
+    }
+};
+// Structured Bindings Support
+// For further reference see https://blog.tartanllama.xyz/structured-bindings/
+// And see https://github.com/nlohmann/json/pull/1391
+template<std::size_t N, typename IteratorType, enable_if_t<N == 0, int> = 0>
+auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.key())
+{
+    return i.key();
+}
+// Structured Bindings Support
+// For further reference see https://blog.tartanllama.xyz/structured-bindings/
+// And see https://github.com/nlohmann/json/pull/1391
+template<std::size_t N, typename IteratorType, enable_if_t<N == 1, int> = 0>
+auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.value())
+{
+    return i.value();
+}
+}  // namespace detail
+}  // namespace nlohmann
+
+// The Addition to the STD Namespace is required to add
+// Structured Bindings Support to the iteration_proxy_value class
+// For further reference see https://blog.tartanllama.xyz/structured-bindings/
+// And see https://github.com/nlohmann/json/pull/1391
+namespace std
+{
+#if defined(__clang__)
+    // Fix: https://github.com/nlohmann/json/issues/1401
+    #pragma clang diagnostic push
+    #pragma clang diagnostic ignored "-Wmismatched-tags"
+#endif
+template<typename IteratorType>
+class tuple_size<::nlohmann::detail::iteration_proxy_value<IteratorType>>
+            : public std::integral_constant<std::size_t, 2> {};
+
+template<std::size_t N, typename IteratorType>
+class tuple_element<N, ::nlohmann::detail::iteration_proxy_value<IteratorType >>
+{
+  public:
+    using type = decltype(
+                     get<N>(std::declval <
+                            ::nlohmann::detail::iteration_proxy_value<IteratorType >> ()));
+};
+#if defined(__clang__)
+    #pragma clang diagnostic pop
+#endif
+} // namespace std
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+#ifdef JSON_HAS_CPP_17
+    #include <filesystem>
+#endif
+
+namespace nlohmann
+{
+namespace detail
+{
+//////////////////
+// constructors //
+//////////////////
+
+/*
+ * Note all external_constructor<>::construct functions need to call
+ * j.m_value.destroy(j.m_type) to avoid a memory leak in case j contains an
+ * allocated value (e.g., a string). See bug issue
+ * https://github.com/nlohmann/json/issues/2865 for more information.
+ */
+
+template<value_t> struct external_constructor;
+
+template<>
+struct external_constructor<value_t::boolean>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::boolean_t b) noexcept
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::boolean;
+        j.m_value = b;
+        j.assert_invariant();
+    }
+};
+
+template<>
+struct external_constructor<value_t::string>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, const typename BasicJsonType::string_t& s)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::string;
+        j.m_value = s;
+        j.assert_invariant();
+    }
+
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::string_t&& s)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::string;
+        j.m_value = std::move(s);
+        j.assert_invariant();
+    }
+
+    template < typename BasicJsonType, typename CompatibleStringType,
+               enable_if_t < !std::is_same<CompatibleStringType, typename BasicJsonType::string_t>::value,
+                             int > = 0 >
+    static void construct(BasicJsonType& j, const CompatibleStringType& str)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::string;
+        j.m_value.string = j.template create<typename BasicJsonType::string_t>(str);
+        j.assert_invariant();
+    }
+};
+
+template<>
+struct external_constructor<value_t::binary>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, const typename BasicJsonType::binary_t& b)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::binary;
+        j.m_value = typename BasicJsonType::binary_t(b);
+        j.assert_invariant();
+    }
+
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::binary_t&& b)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::binary;
+        j.m_value = typename BasicJsonType::binary_t(std::move(b));
+        j.assert_invariant();
+    }
+};
+
+template<>
+struct external_constructor<value_t::number_float>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::number_float_t val) noexcept
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::number_float;
+        j.m_value = val;
+        j.assert_invariant();
+    }
+};
+
+template<>
+struct external_constructor<value_t::number_unsigned>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::number_unsigned_t val) noexcept
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::number_unsigned;
+        j.m_value = val;
+        j.assert_invariant();
+    }
+};
+
+template<>
+struct external_constructor<value_t::number_integer>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::number_integer_t val) noexcept
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::number_integer;
+        j.m_value = val;
+        j.assert_invariant();
+    }
+};
+
+template<>
+struct external_constructor<value_t::array>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, const typename BasicJsonType::array_t& arr)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::array;
+        j.m_value = arr;
+        j.set_parents();
+        j.assert_invariant();
+    }
+
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::array;
+        j.m_value = std::move(arr);
+        j.set_parents();
+        j.assert_invariant();
+    }
+
+    template < typename BasicJsonType, typename CompatibleArrayType,
+               enable_if_t < !std::is_same<CompatibleArrayType, typename BasicJsonType::array_t>::value,
+                             int > = 0 >
+    static void construct(BasicJsonType& j, const CompatibleArrayType& arr)
+    {
+        using std::begin;
+        using std::end;
+
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::array;
+        j.m_value.array = j.template create<typename BasicJsonType::array_t>(begin(arr), end(arr));
+        j.set_parents();
+        j.assert_invariant();
+    }
+
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, const std::vector<bool>& arr)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::array;
+        j.m_value = value_t::array;
+        j.m_value.array->reserve(arr.size());
+        for (const bool x : arr)
+        {
+            j.m_value.array->push_back(x);
+            j.set_parent(j.m_value.array->back());
+        }
+        j.assert_invariant();
+    }
+
+    template<typename BasicJsonType, typename T,
+             enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
+    static void construct(BasicJsonType& j, const std::valarray<T>& arr)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::array;
+        j.m_value = value_t::array;
+        j.m_value.array->resize(arr.size());
+        if (arr.size() > 0)
+        {
+            std::copy(std::begin(arr), std::end(arr), j.m_value.array->begin());
+        }
+        j.set_parents();
+        j.assert_invariant();
+    }
+};
+
+template<>
+struct external_constructor<value_t::object>
+{
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, const typename BasicJsonType::object_t& obj)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::object;
+        j.m_value = obj;
+        j.set_parents();
+        j.assert_invariant();
+    }
+
+    template<typename BasicJsonType>
+    static void construct(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
+    {
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::object;
+        j.m_value = std::move(obj);
+        j.set_parents();
+        j.assert_invariant();
+    }
+
+    template < typename BasicJsonType, typename CompatibleObjectType,
+               enable_if_t < !std::is_same<CompatibleObjectType, typename BasicJsonType::object_t>::value, int > = 0 >
+    static void construct(BasicJsonType& j, const CompatibleObjectType& obj)
+    {
+        using std::begin;
+        using std::end;
+
+        j.m_value.destroy(j.m_type);
+        j.m_type = value_t::object;
+        j.m_value.object = j.template create<typename BasicJsonType::object_t>(begin(obj), end(obj));
+        j.set_parents();
+        j.assert_invariant();
+    }
+};
+
+/////////////
+// to_json //
+/////////////
+
+template<typename BasicJsonType, typename T,
+         enable_if_t<std::is_same<T, typename BasicJsonType::boolean_t>::value, int> = 0>
+void to_json(BasicJsonType& j, T b) noexcept
+{
+    external_constructor<value_t::boolean>::construct(j, b);
+}
+
+template<typename BasicJsonType, typename CompatibleString,
+         enable_if_t<std::is_constructible<typename BasicJsonType::string_t, CompatibleString>::value, int> = 0>
+void to_json(BasicJsonType& j, const CompatibleString& s)
+{
+    external_constructor<value_t::string>::construct(j, s);
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, typename BasicJsonType::string_t&& s)
+{
+    external_constructor<value_t::string>::construct(j, std::move(s));
+}
+
+template<typename BasicJsonType, typename FloatType,
+         enable_if_t<std::is_floating_point<FloatType>::value, int> = 0>
+void to_json(BasicJsonType& j, FloatType val) noexcept
+{
+    external_constructor<value_t::number_float>::construct(j, static_cast<typename BasicJsonType::number_float_t>(val));
+}
+
+template<typename BasicJsonType, typename CompatibleNumberUnsignedType,
+         enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_unsigned_t, CompatibleNumberUnsignedType>::value, int> = 0>
+void to_json(BasicJsonType& j, CompatibleNumberUnsignedType val) noexcept
+{
+    external_constructor<value_t::number_unsigned>::construct(j, static_cast<typename BasicJsonType::number_unsigned_t>(val));
+}
+
+template<typename BasicJsonType, typename CompatibleNumberIntegerType,
+         enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_integer_t, CompatibleNumberIntegerType>::value, int> = 0>
+void to_json(BasicJsonType& j, CompatibleNumberIntegerType val) noexcept
+{
+    external_constructor<value_t::number_integer>::construct(j, static_cast<typename BasicJsonType::number_integer_t>(val));
+}
+
+template<typename BasicJsonType, typename EnumType,
+         enable_if_t<std::is_enum<EnumType>::value, int> = 0>
+void to_json(BasicJsonType& j, EnumType e) noexcept
+{
+    using underlying_type = typename std::underlying_type<EnumType>::type;
+    external_constructor<value_t::number_integer>::construct(j, static_cast<underlying_type>(e));
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, const std::vector<bool>& e)
+{
+    external_constructor<value_t::array>::construct(j, e);
+}
+
+template < typename BasicJsonType, typename CompatibleArrayType,
+           enable_if_t < is_compatible_array_type<BasicJsonType,
+                         CompatibleArrayType>::value&&
+                         !is_compatible_object_type<BasicJsonType, CompatibleArrayType>::value&&
+                         !is_compatible_string_type<BasicJsonType, CompatibleArrayType>::value&&
+                         !std::is_same<typename BasicJsonType::binary_t, CompatibleArrayType>::value&&
+                         !is_basic_json<CompatibleArrayType>::value,
+                         int > = 0 >
+void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
+{
+    external_constructor<value_t::array>::construct(j, arr);
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, const typename BasicJsonType::binary_t& bin)
+{
+    external_constructor<value_t::binary>::construct(j, bin);
+}
+
+template<typename BasicJsonType, typename T,
+         enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
+void to_json(BasicJsonType& j, const std::valarray<T>& arr)
+{
+    external_constructor<value_t::array>::construct(j, std::move(arr));
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
+{
+    external_constructor<value_t::array>::construct(j, std::move(arr));
+}
+
+template < typename BasicJsonType, typename CompatibleObjectType,
+           enable_if_t < is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value&& !is_basic_json<CompatibleObjectType>::value, int > = 0 >
+void to_json(BasicJsonType& j, const CompatibleObjectType& obj)
+{
+    external_constructor<value_t::object>::construct(j, obj);
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
+{
+    external_constructor<value_t::object>::construct(j, std::move(obj));
+}
+
+template <
+    typename BasicJsonType, typename T, std::size_t N,
+    enable_if_t < !std::is_constructible<typename BasicJsonType::string_t,
+                  const T(&)[N]>::value, // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+                  int > = 0 >
+void to_json(BasicJsonType& j, const T(&arr)[N]) // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+{
+    external_constructor<value_t::array>::construct(j, arr);
+}
+
+template < typename BasicJsonType, typename T1, typename T2, enable_if_t < std::is_constructible<BasicJsonType, T1>::value&& std::is_constructible<BasicJsonType, T2>::value, int > = 0 >
+void to_json(BasicJsonType& j, const std::pair<T1, T2>& p)
+{
+    j = { p.first, p.second };
+}
+
+// for https://github.com/nlohmann/json/pull/1134
+template<typename BasicJsonType, typename T,
+         enable_if_t<std::is_same<T, iteration_proxy_value<typename BasicJsonType::iterator>>::value, int> = 0>
+void to_json(BasicJsonType& j, const T& b)
+{
+    j = { {b.key(), b.value()} };
+}
+
+template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
+void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...> /*unused*/)
+{
+    j = { std::get<Idx>(t)... };
+}
+
+template<typename BasicJsonType, typename T, enable_if_t<is_constructible_tuple<BasicJsonType, T>::value, int > = 0>
+void to_json(BasicJsonType& j, const T& t)
+{
+    to_json_tuple_impl(j, t, make_index_sequence<std::tuple_size<T>::value> {});
+}
+
+#ifdef JSON_HAS_CPP_17
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, const std::filesystem::path& p)
+{
+    j = p.string();
+}
+#endif
+
+struct to_json_fn
+{
+    template<typename BasicJsonType, typename T>
+    auto operator()(BasicJsonType& j, T&& val) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
+    -> decltype(to_json(j, std::forward<T>(val)), void())
+    {
+        return to_json(j, std::forward<T>(val));
+    }
+};
+}  // namespace detail
+
+/// namespace to hold default `to_json` function
+/// to see why this is required:
+/// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
+namespace // NOLINT(cert-dcl59-cpp,fuchsia-header-anon-namespaces,google-build-namespaces)
+{
+constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value; // NOLINT(misc-definitions-in-headers)
+} // namespace
+} // namespace nlohmann
+
+// #include <nlohmann/detail/meta/identity_tag.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+
+namespace nlohmann
+{
+
+template<typename ValueType, typename>
+struct adl_serializer
+{
+    /*!
+    @brief convert a JSON value to any value type
+
+    This function is usually called by the `get()` function of the
+    @ref basic_json class (either explicit or via conversion operators).
+
+    @note This function is chosen for default-constructible value types.
+
+    @param[in] j        JSON value to read from
+    @param[in,out] val  value to write to
+    */
+    template<typename BasicJsonType, typename TargetType = ValueType>
+    static auto from_json(BasicJsonType && j, TargetType& val) noexcept(
+        noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
+    -> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void())
+    {
+        ::nlohmann::from_json(std::forward<BasicJsonType>(j), val);
+    }
+
+    /*!
+    @brief convert a JSON value to any value type
+
+    This function is usually called by the `get()` function of the
+    @ref basic_json class (either explicit or via conversion operators).
+
+    @note This function is chosen for value types which are not default-constructible.
+
+    @param[in] j  JSON value to read from
+
+    @return copy of the JSON value, converted to @a ValueType
+    */
+    template<typename BasicJsonType, typename TargetType = ValueType>
+    static auto from_json(BasicJsonType && j) noexcept(
+    noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {})))
+    -> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {}))
+    {
+        return ::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {});
+    }
+
+    /*!
+    @brief convert any value type to a JSON value
+
+    This function is usually called by the constructors of the @ref basic_json
+    class.
+
+    @param[in,out] j  JSON value to write to
+    @param[in] val    value to read from
+    */
+    template<typename BasicJsonType, typename TargetType = ValueType>
+    static auto to_json(BasicJsonType& j, TargetType && val) noexcept(
+        noexcept(::nlohmann::to_json(j, std::forward<TargetType>(val))))
+    -> decltype(::nlohmann::to_json(j, std::forward<TargetType>(val)), void())
+    {
+        ::nlohmann::to_json(j, std::forward<TargetType>(val));
+    }
+};
+}  // namespace nlohmann
+
+// #include <nlohmann/byte_container_with_subtype.hpp>
+
+
+#include <cstdint> // uint8_t, uint64_t
+#include <tuple> // tie
+#include <utility> // move
+
+namespace nlohmann
+{
+
+/*!
+@brief an internal type for a backed binary type
+
+This type extends the template parameter @a BinaryType provided to `basic_json`
+with a subtype used by BSON and MessagePack. This type exists so that the user
+does not have to specify a type themselves with a specific naming scheme in
+order to override the binary type.
+
+@tparam BinaryType container to store bytes (`std::vector<std::uint8_t>` by
+                   default)
+
+@since version 3.8.0; changed type of subtypes to std::uint64_t in 3.10.0.
+*/
+template<typename BinaryType>
+class byte_container_with_subtype : public BinaryType
+{
+  public:
+    /// the type of the underlying container
+    using container_type = BinaryType;
+    /// the type of the subtype
+    using subtype_type = std::uint64_t;
+
+    byte_container_with_subtype() noexcept(noexcept(container_type()))
+        : container_type()
+    {}
+
+    byte_container_with_subtype(const container_type& b) noexcept(noexcept(container_type(b)))
+        : container_type(b)
+    {}
+
+    byte_container_with_subtype(container_type&& b) noexcept(noexcept(container_type(std::move(b))))
+        : container_type(std::move(b))
+    {}
+
+    byte_container_with_subtype(const container_type& b, subtype_type subtype_) noexcept(noexcept(container_type(b)))
+        : container_type(b)
+        , m_subtype(subtype_)
+        , m_has_subtype(true)
+    {}
+
+    byte_container_with_subtype(container_type&& b, subtype_type subtype_) noexcept(noexcept(container_type(std::move(b))))
+        : container_type(std::move(b))
+        , m_subtype(subtype_)
+        , m_has_subtype(true)
+    {}
+
+    bool operator==(const byte_container_with_subtype& rhs) const
+    {
+        return std::tie(static_cast<const BinaryType&>(*this), m_subtype, m_has_subtype) ==
+               std::tie(static_cast<const BinaryType&>(rhs), rhs.m_subtype, rhs.m_has_subtype);
+    }
+
+    bool operator!=(const byte_container_with_subtype& rhs) const
+    {
+        return !(rhs == *this);
+    }
+
+    /*!
+    @brief sets the binary subtype
+
+    Sets the binary subtype of the value, also flags a binary JSON value as
+    having a subtype, which has implications for serialization.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @sa see @ref subtype() -- return the binary subtype
+    @sa see @ref clear_subtype() -- clears the binary subtype
+    @sa see @ref has_subtype() -- returns whether or not the binary value has a
+    subtype
+
+    @since version 3.8.0
+    */
+    void set_subtype(subtype_type subtype_) noexcept
+    {
+        m_subtype = subtype_;
+        m_has_subtype = true;
+    }
+
+    /*!
+    @brief return the binary subtype
+
+    Returns the numerical subtype of the value if it has a subtype. If it does
+    not have a subtype, this function will return subtype_type(-1) as a sentinel
+    value.
+
+    @return the numerical subtype of the binary value
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @sa see @ref set_subtype() -- sets the binary subtype
+    @sa see @ref clear_subtype() -- clears the binary subtype
+    @sa see @ref has_subtype() -- returns whether or not the binary value has a
+    subtype
+
+    @since version 3.8.0; fixed return value to properly return
+           subtype_type(-1) as documented in version 3.10.0
+    */
+    constexpr subtype_type subtype() const noexcept
+    {
+        return m_has_subtype ? m_subtype : subtype_type(-1);
+    }
+
+    /*!
+    @brief return whether the value has a subtype
+
+    @return whether the value has a subtype
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @sa see @ref subtype() -- return the binary subtype
+    @sa see @ref set_subtype() -- sets the binary subtype
+    @sa see @ref clear_subtype() -- clears the binary subtype
+
+    @since version 3.8.0
+    */
+    constexpr bool has_subtype() const noexcept
+    {
+        return m_has_subtype;
+    }
+
+    /*!
+    @brief clears the binary subtype
+
+    Clears the binary subtype and flags the value as not having a subtype, which
+    has implications for serialization; for instance MessagePack will prefer the
+    bin family over the ext family.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @sa see @ref subtype() -- return the binary subtype
+    @sa see @ref set_subtype() -- sets the binary subtype
+    @sa see @ref has_subtype() -- returns whether or not the binary value has a
+    subtype
+
+    @since version 3.8.0
+    */
+    void clear_subtype() noexcept
+    {
+        m_subtype = 0;
+        m_has_subtype = false;
+    }
+
+  private:
+    subtype_type m_subtype = 0;
+    bool m_has_subtype = false;
+};
+
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/conversions/from_json.hpp>
+
+// #include <nlohmann/detail/conversions/to_json.hpp>
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/hash.hpp>
+
+
+#include <cstdint> // uint8_t
+#include <cstddef> // size_t
+#include <functional> // hash
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+
+// boost::hash_combine
+inline std::size_t combine(std::size_t seed, std::size_t h) noexcept
+{
+    seed ^= h + 0x9e3779b9 + (seed << 6U) + (seed >> 2U);
+    return seed;
+}
+
+/*!
+@brief hash a JSON value
+
+The hash function tries to rely on std::hash where possible. Furthermore, the
+type of the JSON value is taken into account to have different hash values for
+null, 0, 0U, and false, etc.
+
+@tparam BasicJsonType basic_json specialization
+@param j JSON value to hash
+@return hash value of j
+*/
+template<typename BasicJsonType>
+std::size_t hash(const BasicJsonType& j)
+{
+    using string_t = typename BasicJsonType::string_t;
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+
+    const auto type = static_cast<std::size_t>(j.type());
+    switch (j.type())
+    {
+        case BasicJsonType::value_t::null:
+        case BasicJsonType::value_t::discarded:
+        {
+            return combine(type, 0);
+        }
+
+        case BasicJsonType::value_t::object:
+        {
+            auto seed = combine(type, j.size());
+            for (const auto& element : j.items())
+            {
+                const auto h = std::hash<string_t> {}(element.key());
+                seed = combine(seed, h);
+                seed = combine(seed, hash(element.value()));
+            }
+            return seed;
+        }
+
+        case BasicJsonType::value_t::array:
+        {
+            auto seed = combine(type, j.size());
+            for (const auto& element : j)
+            {
+                seed = combine(seed, hash(element));
+            }
+            return seed;
+        }
+
+        case BasicJsonType::value_t::string:
+        {
+            const auto h = std::hash<string_t> {}(j.template get_ref<const string_t&>());
+            return combine(type, h);
+        }
+
+        case BasicJsonType::value_t::boolean:
+        {
+            const auto h = std::hash<bool> {}(j.template get<bool>());
+            return combine(type, h);
+        }
+
+        case BasicJsonType::value_t::number_integer:
+        {
+            const auto h = std::hash<number_integer_t> {}(j.template get<number_integer_t>());
+            return combine(type, h);
+        }
+
+        case BasicJsonType::value_t::number_unsigned:
+        {
+            const auto h = std::hash<number_unsigned_t> {}(j.template get<number_unsigned_t>());
+            return combine(type, h);
+        }
+
+        case BasicJsonType::value_t::number_float:
+        {
+            const auto h = std::hash<number_float_t> {}(j.template get<number_float_t>());
+            return combine(type, h);
+        }
+
+        case BasicJsonType::value_t::binary:
+        {
+            auto seed = combine(type, j.get_binary().size());
+            const auto h = std::hash<bool> {}(j.get_binary().has_subtype());
+            seed = combine(seed, h);
+            seed = combine(seed, static_cast<std::size_t>(j.get_binary().subtype()));
+            for (const auto byte : j.get_binary())
+            {
+                seed = combine(seed, std::hash<std::uint8_t> {}(byte));
+            }
+            return seed;
+        }
+
+        default:                   // LCOV_EXCL_LINE
+            JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+            return 0;              // LCOV_EXCL_LINE
+    }
+}
+
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/input/binary_reader.hpp>
+
+
+#include <algorithm> // generate_n
+#include <array> // array
+#include <cmath> // ldexp
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
+#include <cstdio> // snprintf
+#include <cstring> // memcpy
+#include <iterator> // back_inserter
+#include <limits> // numeric_limits
+#include <string> // char_traits, string
+#include <utility> // make_pair, move
+#include <vector> // vector
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/input/input_adapters.hpp>
+
+
+#include <array> // array
+#include <cstddef> // size_t
+#include <cstring> // strlen
+#include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
+#include <memory> // shared_ptr, make_shared, addressof
+#include <numeric> // accumulate
+#include <string> // string, char_traits
+#include <type_traits> // enable_if, is_base_of, is_pointer, is_integral, remove_pointer
+#include <utility> // pair, declval
+
+#ifndef JSON_NO_IO
+    #include <cstdio>   // FILE *
+    #include <istream>  // istream
+#endif                  // JSON_NO_IO
+
+// #include <nlohmann/detail/iterators/iterator_traits.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+/// the supported input formats
+enum class input_format_t { json, cbor, msgpack, ubjson, bson };
+
+////////////////////
+// input adapters //
+////////////////////
+
+#ifndef JSON_NO_IO
+/*!
+Input adapter for stdio file access. This adapter read only 1 byte and do not use any
+ buffer. This adapter is a very low level adapter.
+*/
+class file_input_adapter
+{
+  public:
+    using char_type = char;
+
+    JSON_HEDLEY_NON_NULL(2)
+    explicit file_input_adapter(std::FILE* f) noexcept
+        : m_file(f)
+    {}
+
+    // make class move-only
+    file_input_adapter(const file_input_adapter&) = delete;
+    file_input_adapter(file_input_adapter&&) noexcept = default;
+    file_input_adapter& operator=(const file_input_adapter&) = delete;
+    file_input_adapter& operator=(file_input_adapter&&) = delete;
+    ~file_input_adapter() = default;
+
+    std::char_traits<char>::int_type get_character() noexcept
+    {
+        return std::fgetc(m_file);
+    }
+
+  private:
+    /// the file pointer to read from
+    std::FILE* m_file;
+};
+
+
+/*!
+Input adapter for a (caching) istream. Ignores a UFT Byte Order Mark at
+beginning of input. Does not support changing the underlying std::streambuf
+in mid-input. Maintains underlying std::istream and std::streambuf to support
+subsequent use of standard std::istream operations to process any input
+characters following those used in parsing the JSON input.  Clears the
+std::istream flags; any input errors (e.g., EOF) will be detected by the first
+subsequent call for input from the std::istream.
+*/
+class input_stream_adapter
+{
+  public:
+    using char_type = char;
+
+    ~input_stream_adapter()
+    {
+        // clear stream flags; we use underlying streambuf I/O, do not
+        // maintain ifstream flags, except eof
+        if (is != nullptr)
+        {
+            is->clear(is->rdstate() & std::ios::eofbit);
+        }
+    }
+
+    explicit input_stream_adapter(std::istream& i)
+        : is(&i), sb(i.rdbuf())
+    {}
+
+    // delete because of pointer members
+    input_stream_adapter(const input_stream_adapter&) = delete;
+    input_stream_adapter& operator=(input_stream_adapter&) = delete;
+    input_stream_adapter& operator=(input_stream_adapter&&) = delete;
+
+    input_stream_adapter(input_stream_adapter&& rhs) noexcept
+        : is(rhs.is), sb(rhs.sb)
+    {
+        rhs.is = nullptr;
+        rhs.sb = nullptr;
+    }
+
+    // std::istream/std::streambuf use std::char_traits<char>::to_int_type, to
+    // ensure that std::char_traits<char>::eof() and the character 0xFF do not
+    // end up as the same value, eg. 0xFFFFFFFF.
+    std::char_traits<char>::int_type get_character()
+    {
+        auto res = sb->sbumpc();
+        // set eof manually, as we don't use the istream interface.
+        if (JSON_HEDLEY_UNLIKELY(res == std::char_traits<char>::eof()))
+        {
+            is->clear(is->rdstate() | std::ios::eofbit);
+        }
+        return res;
+    }
+
+  private:
+    /// the associated input stream
+    std::istream* is = nullptr;
+    std::streambuf* sb = nullptr;
+};
+#endif  // JSON_NO_IO
+
+// General-purpose iterator-based adapter. It might not be as fast as
+// theoretically possible for some containers, but it is extremely versatile.
+template<typename IteratorType>
+class iterator_input_adapter
+{
+  public:
+    using char_type = typename std::iterator_traits<IteratorType>::value_type;
+
+    iterator_input_adapter(IteratorType first, IteratorType last)
+        : current(std::move(first)), end(std::move(last))
+    {}
+
+    typename std::char_traits<char_type>::int_type get_character()
+    {
+        if (JSON_HEDLEY_LIKELY(current != end))
+        {
+            auto result = std::char_traits<char_type>::to_int_type(*current);
+            std::advance(current, 1);
+            return result;
+        }
+
+        return std::char_traits<char_type>::eof();
+    }
+
+  private:
+    IteratorType current;
+    IteratorType end;
+
+    template<typename BaseInputAdapter, size_t T>
+    friend struct wide_string_input_helper;
+
+    bool empty() const
+    {
+        return current == end;
+    }
+};
+
+
+template<typename BaseInputAdapter, size_t T>
+struct wide_string_input_helper;
+
+template<typename BaseInputAdapter>
+struct wide_string_input_helper<BaseInputAdapter, 4>
+{
+    // UTF-32
+    static void fill_buffer(BaseInputAdapter& input,
+                            std::array<std::char_traits<char>::int_type, 4>& utf8_bytes,
+                            size_t& utf8_bytes_index,
+                            size_t& utf8_bytes_filled)
+    {
+        utf8_bytes_index = 0;
+
+        if (JSON_HEDLEY_UNLIKELY(input.empty()))
+        {
+            utf8_bytes[0] = std::char_traits<char>::eof();
+            utf8_bytes_filled = 1;
+        }
+        else
+        {
+            // get the current character
+            const auto wc = input.get_character();
+
+            // UTF-32 to UTF-8 encoding
+            if (wc < 0x80)
+            {
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+                utf8_bytes_filled = 1;
+            }
+            else if (wc <= 0x7FF)
+            {
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xC0u | ((static_cast<unsigned int>(wc) >> 6u) & 0x1Fu));
+                utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+                utf8_bytes_filled = 2;
+            }
+            else if (wc <= 0xFFFF)
+            {
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xE0u | ((static_cast<unsigned int>(wc) >> 12u) & 0x0Fu));
+                utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 6u) & 0x3Fu));
+                utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+                utf8_bytes_filled = 3;
+            }
+            else if (wc <= 0x10FFFF)
+            {
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xF0u | ((static_cast<unsigned int>(wc) >> 18u) & 0x07u));
+                utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 12u) & 0x3Fu));
+                utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 6u) & 0x3Fu));
+                utf8_bytes[3] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+                utf8_bytes_filled = 4;
+            }
+            else
+            {
+                // unknown character
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+                utf8_bytes_filled = 1;
+            }
+        }
+    }
+};
+
+template<typename BaseInputAdapter>
+struct wide_string_input_helper<BaseInputAdapter, 2>
+{
+    // UTF-16
+    static void fill_buffer(BaseInputAdapter& input,
+                            std::array<std::char_traits<char>::int_type, 4>& utf8_bytes,
+                            size_t& utf8_bytes_index,
+                            size_t& utf8_bytes_filled)
+    {
+        utf8_bytes_index = 0;
+
+        if (JSON_HEDLEY_UNLIKELY(input.empty()))
+        {
+            utf8_bytes[0] = std::char_traits<char>::eof();
+            utf8_bytes_filled = 1;
+        }
+        else
+        {
+            // get the current character
+            const auto wc = input.get_character();
+
+            // UTF-16 to UTF-8 encoding
+            if (wc < 0x80)
+            {
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+                utf8_bytes_filled = 1;
+            }
+            else if (wc <= 0x7FF)
+            {
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xC0u | ((static_cast<unsigned int>(wc) >> 6u)));
+                utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+                utf8_bytes_filled = 2;
+            }
+            else if (0xD800 > wc || wc >= 0xE000)
+            {
+                utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xE0u | ((static_cast<unsigned int>(wc) >> 12u)));
+                utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 6u) & 0x3Fu));
+                utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+                utf8_bytes_filled = 3;
+            }
+            else
+            {
+                if (JSON_HEDLEY_UNLIKELY(!input.empty()))
+                {
+                    const auto wc2 = static_cast<unsigned int>(input.get_character());
+                    const auto charcode = 0x10000u + (((static_cast<unsigned int>(wc) & 0x3FFu) << 10u) | (wc2 & 0x3FFu));
+                    utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xF0u | (charcode >> 18u));
+                    utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((charcode >> 12u) & 0x3Fu));
+                    utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | ((charcode >> 6u) & 0x3Fu));
+                    utf8_bytes[3] = static_cast<std::char_traits<char>::int_type>(0x80u | (charcode & 0x3Fu));
+                    utf8_bytes_filled = 4;
+                }
+                else
+                {
+                    utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+                    utf8_bytes_filled = 1;
+                }
+            }
+        }
+    }
+};
+
+// Wraps another input apdater to convert wide character types into individual bytes.
+template<typename BaseInputAdapter, typename WideCharType>
+class wide_string_input_adapter
+{
+  public:
+    using char_type = char;
+
+    wide_string_input_adapter(BaseInputAdapter base)
+        : base_adapter(base) {}
+
+    typename std::char_traits<char>::int_type get_character() noexcept
+    {
+        // check if buffer needs to be filled
+        if (utf8_bytes_index == utf8_bytes_filled)
+        {
+            fill_buffer<sizeof(WideCharType)>();
+
+            JSON_ASSERT(utf8_bytes_filled > 0);
+            JSON_ASSERT(utf8_bytes_index == 0);
+        }
+
+        // use buffer
+        JSON_ASSERT(utf8_bytes_filled > 0);
+        JSON_ASSERT(utf8_bytes_index < utf8_bytes_filled);
+        return utf8_bytes[utf8_bytes_index++];
+    }
+
+  private:
+    BaseInputAdapter base_adapter;
+
+    template<size_t T>
+    void fill_buffer()
+    {
+        wide_string_input_helper<BaseInputAdapter, T>::fill_buffer(base_adapter, utf8_bytes, utf8_bytes_index, utf8_bytes_filled);
+    }
+
+    /// a buffer for UTF-8 bytes
+    std::array<std::char_traits<char>::int_type, 4> utf8_bytes = {{0, 0, 0, 0}};
+
+    /// index to the utf8_codes array for the next valid byte
+    std::size_t utf8_bytes_index = 0;
+    /// number of valid bytes in the utf8_codes array
+    std::size_t utf8_bytes_filled = 0;
+};
+
+
+template<typename IteratorType, typename Enable = void>
+struct iterator_input_adapter_factory
+{
+    using iterator_type = IteratorType;
+    using char_type = typename std::iterator_traits<iterator_type>::value_type;
+    using adapter_type = iterator_input_adapter<iterator_type>;
+
+    static adapter_type create(IteratorType first, IteratorType last)
+    {
+        return adapter_type(std::move(first), std::move(last));
+    }
+};
+
+template<typename T>
+struct is_iterator_of_multibyte
+{
+    using value_type = typename std::iterator_traits<T>::value_type;
+    enum
+    {
+        value = sizeof(value_type) > 1
+    };
+};
+
+template<typename IteratorType>
+struct iterator_input_adapter_factory<IteratorType, enable_if_t<is_iterator_of_multibyte<IteratorType>::value>>
+{
+    using iterator_type = IteratorType;
+    using char_type = typename std::iterator_traits<iterator_type>::value_type;
+    using base_adapter_type = iterator_input_adapter<iterator_type>;
+    using adapter_type = wide_string_input_adapter<base_adapter_type, char_type>;
+
+    static adapter_type create(IteratorType first, IteratorType last)
+    {
+        return adapter_type(base_adapter_type(std::move(first), std::move(last)));
+    }
+};
+
+// General purpose iterator-based input
+template<typename IteratorType>
+typename iterator_input_adapter_factory<IteratorType>::adapter_type input_adapter(IteratorType first, IteratorType last)
+{
+    using factory_type = iterator_input_adapter_factory<IteratorType>;
+    return factory_type::create(first, last);
+}
+
+// Convenience shorthand from container to iterator
+// Enables ADL on begin(container) and end(container)
+// Encloses the using declarations in namespace for not to leak them to outside scope
+
+namespace container_input_adapter_factory_impl
+{
+
+using std::begin;
+using std::end;
+
+template<typename ContainerType, typename Enable = void>
+struct container_input_adapter_factory {};
+
+template<typename ContainerType>
+struct container_input_adapter_factory< ContainerType,
+       void_t<decltype(begin(std::declval<ContainerType>()), end(std::declval<ContainerType>()))>>
+       {
+           using adapter_type = decltype(input_adapter(begin(std::declval<ContainerType>()), end(std::declval<ContainerType>())));
+
+           static adapter_type create(const ContainerType& container)
+{
+    return input_adapter(begin(container), end(container));
+}
+       };
+
+} // namespace container_input_adapter_factory_impl
+
+template<typename ContainerType>
+typename container_input_adapter_factory_impl::container_input_adapter_factory<ContainerType>::adapter_type input_adapter(const ContainerType& container)
+{
+    return container_input_adapter_factory_impl::container_input_adapter_factory<ContainerType>::create(container);
+}
+
+#ifndef JSON_NO_IO
+// Special cases with fast paths
+inline file_input_adapter input_adapter(std::FILE* file)
+{
+    return file_input_adapter(file);
+}
+
+inline input_stream_adapter input_adapter(std::istream& stream)
+{
+    return input_stream_adapter(stream);
+}
+
+inline input_stream_adapter input_adapter(std::istream&& stream)
+{
+    return input_stream_adapter(stream);
+}
+#endif  // JSON_NO_IO
+
+using contiguous_bytes_input_adapter = decltype(input_adapter(std::declval<const char*>(), std::declval<const char*>()));
+
+// Null-delimited strings, and the like.
+template < typename CharT,
+           typename std::enable_if <
+               std::is_pointer<CharT>::value&&
+               !std::is_array<CharT>::value&&
+               std::is_integral<typename std::remove_pointer<CharT>::type>::value&&
+               sizeof(typename std::remove_pointer<CharT>::type) == 1,
+               int >::type = 0 >
+contiguous_bytes_input_adapter input_adapter(CharT b)
+{
+    auto length = std::strlen(reinterpret_cast<const char*>(b));
+    const auto* ptr = reinterpret_cast<const char*>(b);
+    return input_adapter(ptr, ptr + length);
+}
+
+template<typename T, std::size_t N>
+auto input_adapter(T (&array)[N]) -> decltype(input_adapter(array, array + N)) // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+{
+    return input_adapter(array, array + N);
+}
+
+// This class only handles inputs of input_buffer_adapter type.
+// It's required so that expressions like {ptr, len} can be implicitely casted
+// to the correct adapter.
+class span_input_adapter
+{
+  public:
+    template < typename CharT,
+               typename std::enable_if <
+                   std::is_pointer<CharT>::value&&
+                   std::is_integral<typename std::remove_pointer<CharT>::type>::value&&
+                   sizeof(typename std::remove_pointer<CharT>::type) == 1,
+                   int >::type = 0 >
+    span_input_adapter(CharT b, std::size_t l)
+        : ia(reinterpret_cast<const char*>(b), reinterpret_cast<const char*>(b) + l) {}
+
+    template<class IteratorType,
+             typename std::enable_if<
+                 std::is_same<typename iterator_traits<IteratorType>::iterator_category, std::random_access_iterator_tag>::value,
+                 int>::type = 0>
+    span_input_adapter(IteratorType first, IteratorType last)
+        : ia(input_adapter(first, last)) {}
+
+    contiguous_bytes_input_adapter&& get()
+    {
+        return std::move(ia); // NOLINT(hicpp-move-const-arg,performance-move-const-arg)
+    }
+
+  private:
+    contiguous_bytes_input_adapter ia;
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/input/json_sax.hpp>
+
+
+#include <cstddef>
+#include <string> // string
+#include <utility> // move
+#include <vector> // vector
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+
+/*!
+@brief SAX interface
+
+This class describes the SAX interface used by @ref nlohmann::json::sax_parse.
+Each function is called in different situations while the input is parsed. The
+boolean return value informs the parser whether to continue processing the
+input.
+*/
+template<typename BasicJsonType>
+struct json_sax
+{
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+
+    /*!
+    @brief a null value was read
+    @return whether parsing should proceed
+    */
+    virtual bool null() = 0;
+
+    /*!
+    @brief a boolean value was read
+    @param[in] val  boolean value
+    @return whether parsing should proceed
+    */
+    virtual bool boolean(bool val) = 0;
+
+    /*!
+    @brief an integer number was read
+    @param[in] val  integer value
+    @return whether parsing should proceed
+    */
+    virtual bool number_integer(number_integer_t val) = 0;
+
+    /*!
+    @brief an unsigned integer number was read
+    @param[in] val  unsigned integer value
+    @return whether parsing should proceed
+    */
+    virtual bool number_unsigned(number_unsigned_t val) = 0;
+
+    /*!
+    @brief an floating-point number was read
+    @param[in] val  floating-point value
+    @param[in] s    raw token value
+    @return whether parsing should proceed
+    */
+    virtual bool number_float(number_float_t val, const string_t& s) = 0;
+
+    /*!
+    @brief a string was read
+    @param[in] val  string value
+    @return whether parsing should proceed
+    @note It is safe to move the passed string.
+    */
+    virtual bool string(string_t& val) = 0;
+
+    /*!
+    @brief a binary string was read
+    @param[in] val  binary value
+    @return whether parsing should proceed
+    @note It is safe to move the passed binary.
+    */
+    virtual bool binary(binary_t& val) = 0;
+
+    /*!
+    @brief the beginning of an object was read
+    @param[in] elements  number of object elements or -1 if unknown
+    @return whether parsing should proceed
+    @note binary formats may report the number of elements
+    */
+    virtual bool start_object(std::size_t elements) = 0;
+
+    /*!
+    @brief an object key was read
+    @param[in] val  object key
+    @return whether parsing should proceed
+    @note It is safe to move the passed string.
+    */
+    virtual bool key(string_t& val) = 0;
+
+    /*!
+    @brief the end of an object was read
+    @return whether parsing should proceed
+    */
+    virtual bool end_object() = 0;
+
+    /*!
+    @brief the beginning of an array was read
+    @param[in] elements  number of array elements or -1 if unknown
+    @return whether parsing should proceed
+    @note binary formats may report the number of elements
+    */
+    virtual bool start_array(std::size_t elements) = 0;
+
+    /*!
+    @brief the end of an array was read
+    @return whether parsing should proceed
+    */
+    virtual bool end_array() = 0;
+
+    /*!
+    @brief a parse error occurred
+    @param[in] position    the position in the input where the error occurs
+    @param[in] last_token  the last read token
+    @param[in] ex          an exception object describing the error
+    @return whether parsing should proceed (must return false)
+    */
+    virtual bool parse_error(std::size_t position,
+                             const std::string& last_token,
+                             const detail::exception& ex) = 0;
+
+    json_sax() = default;
+    json_sax(const json_sax&) = default;
+    json_sax(json_sax&&) noexcept = default;
+    json_sax& operator=(const json_sax&) = default;
+    json_sax& operator=(json_sax&&) noexcept = default;
+    virtual ~json_sax() = default;
+};
+
+
+namespace detail
+{
+/*!
+@brief SAX implementation to create a JSON value from SAX events
+
+This class implements the @ref json_sax interface and processes the SAX events
+to create a JSON value which makes it basically a DOM parser. The structure or
+hierarchy of the JSON value is managed by the stack `ref_stack` which contains
+a pointer to the respective array or object for each recursion depth.
+
+After successful parsing, the value that is passed by reference to the
+constructor contains the parsed value.
+
+@tparam BasicJsonType  the JSON type
+*/
+template<typename BasicJsonType>
+class json_sax_dom_parser
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+
+    /*!
+    @param[in,out] r  reference to a JSON value that is manipulated while
+                       parsing
+    @param[in] allow_exceptions_  whether parse errors yield exceptions
+    */
+    explicit json_sax_dom_parser(BasicJsonType& r, const bool allow_exceptions_ = true)
+        : root(r), allow_exceptions(allow_exceptions_)
+    {}
+
+    // make class move-only
+    json_sax_dom_parser(const json_sax_dom_parser&) = delete;
+    json_sax_dom_parser(json_sax_dom_parser&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    json_sax_dom_parser& operator=(const json_sax_dom_parser&) = delete;
+    json_sax_dom_parser& operator=(json_sax_dom_parser&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    ~json_sax_dom_parser() = default;
+
+    bool null()
+    {
+        handle_value(nullptr);
+        return true;
+    }
+
+    bool boolean(bool val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_integer(number_integer_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_float(number_float_t val, const string_t& /*unused*/)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool string(string_t& val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool binary(binary_t& val)
+    {
+        handle_value(std::move(val));
+        return true;
+    }
+
+    bool start_object(std::size_t len)
+    {
+        ref_stack.push_back(handle_value(BasicJsonType::value_t::object));
+
+        if (JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) && len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408, "excessive object size: " + std::to_string(len), *ref_stack.back()));
+        }
+
+        return true;
+    }
+
+    bool key(string_t& val)
+    {
+        // add null at given key and store the reference for later
+        object_element = &(ref_stack.back()->m_value.object->operator[](val));
+        return true;
+    }
+
+    bool end_object()
+    {
+        ref_stack.back()->set_parents();
+        ref_stack.pop_back();
+        return true;
+    }
+
+    bool start_array(std::size_t len)
+    {
+        ref_stack.push_back(handle_value(BasicJsonType::value_t::array));
+
+        if (JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) && len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408, "excessive array size: " + std::to_string(len), *ref_stack.back()));
+        }
+
+        return true;
+    }
+
+    bool end_array()
+    {
+        ref_stack.back()->set_parents();
+        ref_stack.pop_back();
+        return true;
+    }
+
+    template<class Exception>
+    bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/,
+                     const Exception& ex)
+    {
+        errored = true;
+        static_cast<void>(ex);
+        if (allow_exceptions)
+        {
+            JSON_THROW(ex);
+        }
+        return false;
+    }
+
+    constexpr bool is_errored() const
+    {
+        return errored;
+    }
+
+  private:
+    /*!
+    @invariant If the ref stack is empty, then the passed value will be the new
+               root.
+    @invariant If the ref stack contains a value, then it is an array or an
+               object to which we can add elements
+    */
+    template<typename Value>
+    JSON_HEDLEY_RETURNS_NON_NULL
+    BasicJsonType* handle_value(Value&& v)
+    {
+        if (ref_stack.empty())
+        {
+            root = BasicJsonType(std::forward<Value>(v));
+            return &root;
+        }
+
+        JSON_ASSERT(ref_stack.back()->is_array() || ref_stack.back()->is_object());
+
+        if (ref_stack.back()->is_array())
+        {
+            ref_stack.back()->m_value.array->emplace_back(std::forward<Value>(v));
+            return &(ref_stack.back()->m_value.array->back());
+        }
+
+        JSON_ASSERT(ref_stack.back()->is_object());
+        JSON_ASSERT(object_element);
+        *object_element = BasicJsonType(std::forward<Value>(v));
+        return object_element;
+    }
+
+    /// the parsed JSON value
+    BasicJsonType& root;
+    /// stack to model hierarchy of values
+    std::vector<BasicJsonType*> ref_stack {};
+    /// helper to hold the reference for the next object element
+    BasicJsonType* object_element = nullptr;
+    /// whether a syntax error occurred
+    bool errored = false;
+    /// whether to throw exceptions in case of errors
+    const bool allow_exceptions = true;
+};
+
+template<typename BasicJsonType>
+class json_sax_dom_callback_parser
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+    using parser_callback_t = typename BasicJsonType::parser_callback_t;
+    using parse_event_t = typename BasicJsonType::parse_event_t;
+
+    json_sax_dom_callback_parser(BasicJsonType& r,
+                                 const parser_callback_t cb,
+                                 const bool allow_exceptions_ = true)
+        : root(r), callback(cb), allow_exceptions(allow_exceptions_)
+    {
+        keep_stack.push_back(true);
+    }
+
+    // make class move-only
+    json_sax_dom_callback_parser(const json_sax_dom_callback_parser&) = delete;
+    json_sax_dom_callback_parser(json_sax_dom_callback_parser&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    json_sax_dom_callback_parser& operator=(const json_sax_dom_callback_parser&) = delete;
+    json_sax_dom_callback_parser& operator=(json_sax_dom_callback_parser&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    ~json_sax_dom_callback_parser() = default;
+
+    bool null()
+    {
+        handle_value(nullptr);
+        return true;
+    }
+
+    bool boolean(bool val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_integer(number_integer_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_float(number_float_t val, const string_t& /*unused*/)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool string(string_t& val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool binary(binary_t& val)
+    {
+        handle_value(std::move(val));
+        return true;
+    }
+
+    bool start_object(std::size_t len)
+    {
+        // check callback for object start
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::object_start, discarded);
+        keep_stack.push_back(keep);
+
+        auto val = handle_value(BasicJsonType::value_t::object, true);
+        ref_stack.push_back(val.second);
+
+        // check object limit
+        if (ref_stack.back() && JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) && len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408, "excessive object size: " + std::to_string(len), *ref_stack.back()));
+        }
+
+        return true;
+    }
+
+    bool key(string_t& val)
+    {
+        BasicJsonType k = BasicJsonType(val);
+
+        // check callback for key
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::key, k);
+        key_keep_stack.push_back(keep);
+
+        // add discarded value at given key and store the reference for later
+        if (keep && ref_stack.back())
+        {
+            object_element = &(ref_stack.back()->m_value.object->operator[](val) = discarded);
+        }
+
+        return true;
+    }
+
+    bool end_object()
+    {
+        if (ref_stack.back())
+        {
+            if (!callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::object_end, *ref_stack.back()))
+            {
+                // discard object
+                *ref_stack.back() = discarded;
+            }
+            else
+            {
+                ref_stack.back()->set_parents();
+            }
+        }
+
+        JSON_ASSERT(!ref_stack.empty());
+        JSON_ASSERT(!keep_stack.empty());
+        ref_stack.pop_back();
+        keep_stack.pop_back();
+
+        if (!ref_stack.empty() && ref_stack.back() && ref_stack.back()->is_structured())
+        {
+            // remove discarded value
+            for (auto it = ref_stack.back()->begin(); it != ref_stack.back()->end(); ++it)
+            {
+                if (it->is_discarded())
+                {
+                    ref_stack.back()->erase(it);
+                    break;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    bool start_array(std::size_t len)
+    {
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::array_start, discarded);
+        keep_stack.push_back(keep);
+
+        auto val = handle_value(BasicJsonType::value_t::array, true);
+        ref_stack.push_back(val.second);
+
+        // check array limit
+        if (ref_stack.back() && JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) && len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408, "excessive array size: " + std::to_string(len), *ref_stack.back()));
+        }
+
+        return true;
+    }
+
+    bool end_array()
+    {
+        bool keep = true;
+
+        if (ref_stack.back())
+        {
+            keep = callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::array_end, *ref_stack.back());
+            if (keep)
+            {
+                ref_stack.back()->set_parents();
+            }
+            else
+            {
+                // discard array
+                *ref_stack.back() = discarded;
+            }
+        }
+
+        JSON_ASSERT(!ref_stack.empty());
+        JSON_ASSERT(!keep_stack.empty());
+        ref_stack.pop_back();
+        keep_stack.pop_back();
+
+        // remove discarded value
+        if (!keep && !ref_stack.empty() && ref_stack.back()->is_array())
+        {
+            ref_stack.back()->m_value.array->pop_back();
+        }
+
+        return true;
+    }
+
+    template<class Exception>
+    bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/,
+                     const Exception& ex)
+    {
+        errored = true;
+        static_cast<void>(ex);
+        if (allow_exceptions)
+        {
+            JSON_THROW(ex);
+        }
+        return false;
+    }
+
+    constexpr bool is_errored() const
+    {
+        return errored;
+    }
+
+  private:
+    /*!
+    @param[in] v  value to add to the JSON value we build during parsing
+    @param[in] skip_callback  whether we should skip calling the callback
+               function; this is required after start_array() and
+               start_object() SAX events, because otherwise we would call the
+               callback function with an empty array or object, respectively.
+
+    @invariant If the ref stack is empty, then the passed value will be the new
+               root.
+    @invariant If the ref stack contains a value, then it is an array or an
+               object to which we can add elements
+
+    @return pair of boolean (whether value should be kept) and pointer (to the
+            passed value in the ref_stack hierarchy; nullptr if not kept)
+    */
+    template<typename Value>
+    std::pair<bool, BasicJsonType*> handle_value(Value&& v, const bool skip_callback = false)
+    {
+        JSON_ASSERT(!keep_stack.empty());
+
+        // do not handle this value if we know it would be added to a discarded
+        // container
+        if (!keep_stack.back())
+        {
+            return {false, nullptr};
+        }
+
+        // create value
+        auto value = BasicJsonType(std::forward<Value>(v));
+
+        // check callback
+        const bool keep = skip_callback || callback(static_cast<int>(ref_stack.size()), parse_event_t::value, value);
+
+        // do not handle this value if we just learnt it shall be discarded
+        if (!keep)
+        {
+            return {false, nullptr};
+        }
+
+        if (ref_stack.empty())
+        {
+            root = std::move(value);
+            return {true, &root};
+        }
+
+        // skip this value if we already decided to skip the parent
+        // (https://github.com/nlohmann/json/issues/971#issuecomment-413678360)
+        if (!ref_stack.back())
+        {
+            return {false, nullptr};
+        }
+
+        // we now only expect arrays and objects
+        JSON_ASSERT(ref_stack.back()->is_array() || ref_stack.back()->is_object());
+
+        // array
+        if (ref_stack.back()->is_array())
+        {
+            ref_stack.back()->m_value.array->emplace_back(std::move(value));
+            return {true, &(ref_stack.back()->m_value.array->back())};
+        }
+
+        // object
+        JSON_ASSERT(ref_stack.back()->is_object());
+        // check if we should store an element for the current key
+        JSON_ASSERT(!key_keep_stack.empty());
+        const bool store_element = key_keep_stack.back();
+        key_keep_stack.pop_back();
+
+        if (!store_element)
+        {
+            return {false, nullptr};
+        }
+
+        JSON_ASSERT(object_element);
+        *object_element = std::move(value);
+        return {true, object_element};
+    }
+
+    /// the parsed JSON value
+    BasicJsonType& root;
+    /// stack to model hierarchy of values
+    std::vector<BasicJsonType*> ref_stack {};
+    /// stack to manage which values to keep
+    std::vector<bool> keep_stack {};
+    /// stack to manage which object keys to keep
+    std::vector<bool> key_keep_stack {};
+    /// helper to hold the reference for the next object element
+    BasicJsonType* object_element = nullptr;
+    /// whether a syntax error occurred
+    bool errored = false;
+    /// callback function
+    const parser_callback_t callback = nullptr;
+    /// whether to throw exceptions in case of errors
+    const bool allow_exceptions = true;
+    /// a discarded value for the callback
+    BasicJsonType discarded = BasicJsonType::value_t::discarded;
+};
+
+template<typename BasicJsonType>
+class json_sax_acceptor
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+
+    bool null()
+    {
+        return true;
+    }
+
+    bool boolean(bool /*unused*/)
+    {
+        return true;
+    }
+
+    bool number_integer(number_integer_t /*unused*/)
+    {
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t /*unused*/)
+    {
+        return true;
+    }
+
+    bool number_float(number_float_t /*unused*/, const string_t& /*unused*/)
+    {
+        return true;
+    }
+
+    bool string(string_t& /*unused*/)
+    {
+        return true;
+    }
+
+    bool binary(binary_t& /*unused*/)
+    {
+        return true;
+    }
+
+    bool start_object(std::size_t /*unused*/ = std::size_t(-1))
+    {
+        return true;
+    }
+
+    bool key(string_t& /*unused*/)
+    {
+        return true;
+    }
+
+    bool end_object()
+    {
+        return true;
+    }
+
+    bool start_array(std::size_t /*unused*/ = std::size_t(-1))
+    {
+        return true;
+    }
+
+    bool end_array()
+    {
+        return true;
+    }
+
+    bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/, const detail::exception& /*unused*/)
+    {
+        return false;
+    }
+};
+}  // namespace detail
+
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/input/lexer.hpp>
+
+
+#include <array> // array
+#include <clocale> // localeconv
+#include <cstddef> // size_t
+#include <cstdio> // snprintf
+#include <cstdlib> // strtof, strtod, strtold, strtoll, strtoull
+#include <initializer_list> // initializer_list
+#include <string> // char_traits, string
+#include <utility> // move
+#include <vector> // vector
+
+// #include <nlohmann/detail/input/input_adapters.hpp>
+
+// #include <nlohmann/detail/input/position_t.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+///////////
+// lexer //
+///////////
+
+template<typename BasicJsonType>
+class lexer_base
+{
+  public:
+    /// token types for the parser
+    enum class token_type
+    {
+        uninitialized,    ///< indicating the scanner is uninitialized
+        literal_true,     ///< the `true` literal
+        literal_false,    ///< the `false` literal
+        literal_null,     ///< the `null` literal
+        value_string,     ///< a string -- use get_string() for actual value
+        value_unsigned,   ///< an unsigned integer -- use get_number_unsigned() for actual value
+        value_integer,    ///< a signed integer -- use get_number_integer() for actual value
+        value_float,      ///< an floating point number -- use get_number_float() for actual value
+        begin_array,      ///< the character for array begin `[`
+        begin_object,     ///< the character for object begin `{`
+        end_array,        ///< the character for array end `]`
+        end_object,       ///< the character for object end `}`
+        name_separator,   ///< the name separator `:`
+        value_separator,  ///< the value separator `,`
+        parse_error,      ///< indicating a parse error
+        end_of_input,     ///< indicating the end of the input buffer
+        literal_or_value  ///< a literal or the begin of a value (only for diagnostics)
+    };
+
+    /// return name of values of type token_type (only used for errors)
+    JSON_HEDLEY_RETURNS_NON_NULL
+    JSON_HEDLEY_CONST
+    static const char* token_type_name(const token_type t) noexcept
+    {
+        switch (t)
+        {
+            case token_type::uninitialized:
+                return "<uninitialized>";
+            case token_type::literal_true:
+                return "true literal";
+            case token_type::literal_false:
+                return "false literal";
+            case token_type::literal_null:
+                return "null literal";
+            case token_type::value_string:
+                return "string literal";
+            case token_type::value_unsigned:
+            case token_type::value_integer:
+            case token_type::value_float:
+                return "number literal";
+            case token_type::begin_array:
+                return "'['";
+            case token_type::begin_object:
+                return "'{'";
+            case token_type::end_array:
+                return "']'";
+            case token_type::end_object:
+                return "'}'";
+            case token_type::name_separator:
+                return "':'";
+            case token_type::value_separator:
+                return "','";
+            case token_type::parse_error:
+                return "<parse error>";
+            case token_type::end_of_input:
+                return "end of input";
+            case token_type::literal_or_value:
+                return "'[', '{', or a literal";
+            // LCOV_EXCL_START
+            default: // catch non-enum values
+                return "unknown token";
+                // LCOV_EXCL_STOP
+        }
+    }
+};
+/*!
+@brief lexical analysis
+
+This class organizes the lexical analysis during JSON deserialization.
+*/
+template<typename BasicJsonType, typename InputAdapterType>
+class lexer : public lexer_base<BasicJsonType>
+{
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using char_type = typename InputAdapterType::char_type;
+    using char_int_type = typename std::char_traits<char_type>::int_type;
+
+  public:
+    using token_type = typename lexer_base<BasicJsonType>::token_type;
+
+    explicit lexer(InputAdapterType&& adapter, bool ignore_comments_ = false) noexcept
+        : ia(std::move(adapter))
+        , ignore_comments(ignore_comments_)
+        , decimal_point_char(static_cast<char_int_type>(get_decimal_point()))
+    {}
+
+    // delete because of pointer members
+    lexer(const lexer&) = delete;
+    lexer(lexer&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    lexer& operator=(lexer&) = delete;
+    lexer& operator=(lexer&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    ~lexer() = default;
+
+  private:
+    /////////////////////
+    // locales
+    /////////////////////
+
+    /// return the locale-dependent decimal point
+    JSON_HEDLEY_PURE
+    static char get_decimal_point() noexcept
+    {
+        const auto* loc = localeconv();
+        JSON_ASSERT(loc != nullptr);
+        return (loc->decimal_point == nullptr) ? '.' : *(loc->decimal_point);
+    }
+
+    /////////////////////
+    // scan functions
+    /////////////////////
+
+    /*!
+    @brief get codepoint from 4 hex characters following `\u`
+
+    For input "\u c1 c2 c3 c4" the codepoint is:
+      (c1 * 0x1000) + (c2 * 0x0100) + (c3 * 0x0010) + c4
+    = (c1 << 12) + (c2 << 8) + (c3 << 4) + (c4 << 0)
+
+    Furthermore, the possible characters '0'..'9', 'A'..'F', and 'a'..'f'
+    must be converted to the integers 0x0..0x9, 0xA..0xF, 0xA..0xF, resp. The
+    conversion is done by subtracting the offset (0x30, 0x37, and 0x57)
+    between the ASCII value of the character and the desired integer value.
+
+    @return codepoint (0x0000..0xFFFF) or -1 in case of an error (e.g. EOF or
+            non-hex character)
+    */
+    int get_codepoint()
+    {
+        // this function only makes sense after reading `\u`
+        JSON_ASSERT(current == 'u');
+        int codepoint = 0;
+
+        const auto factors = { 12u, 8u, 4u, 0u };
+        for (const auto factor : factors)
+        {
+            get();
+
+            if (current >= '0' && current <= '9')
+            {
+                codepoint += static_cast<int>((static_cast<unsigned int>(current) - 0x30u) << factor);
+            }
+            else if (current >= 'A' && current <= 'F')
+            {
+                codepoint += static_cast<int>((static_cast<unsigned int>(current) - 0x37u) << factor);
+            }
+            else if (current >= 'a' && current <= 'f')
+            {
+                codepoint += static_cast<int>((static_cast<unsigned int>(current) - 0x57u) << factor);
+            }
+            else
+            {
+                return -1;
+            }
+        }
+
+        JSON_ASSERT(0x0000 <= codepoint && codepoint <= 0xFFFF);
+        return codepoint;
+    }
+
+    /*!
+    @brief check if the next byte(s) are inside a given range
+
+    Adds the current byte and, for each passed range, reads a new byte and
+    checks if it is inside the range. If a violation was detected, set up an
+    error message and return false. Otherwise, return true.
+
+    @param[in] ranges  list of integers; interpreted as list of pairs of
+                       inclusive lower and upper bound, respectively
+
+    @pre The passed list @a ranges must have 2, 4, or 6 elements; that is,
+         1, 2, or 3 pairs. This precondition is enforced by an assertion.
+
+    @return true if and only if no range violation was detected
+    */
+    bool next_byte_in_range(std::initializer_list<char_int_type> ranges)
+    {
+        JSON_ASSERT(ranges.size() == 2 || ranges.size() == 4 || ranges.size() == 6);
+        add(current);
+
+        for (auto range = ranges.begin(); range != ranges.end(); ++range)
+        {
+            get();
+            if (JSON_HEDLEY_LIKELY(*range <= current && current <= *(++range)))
+            {
+                add(current);
+            }
+            else
+            {
+                error_message = "invalid string: ill-formed UTF-8 byte";
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /*!
+    @brief scan a string literal
+
+    This function scans a string according to Sect. 7 of RFC 8259. While
+    scanning, bytes are escaped and copied into buffer token_buffer. Then the
+    function returns successfully, token_buffer is *not* null-terminated (as it
+    may contain \0 bytes), and token_buffer.size() is the number of bytes in the
+    string.
+
+    @return token_type::value_string if string could be successfully scanned,
+            token_type::parse_error otherwise
+
+    @note In case of errors, variable error_message contains a textual
+          description.
+    */
+    token_type scan_string()
+    {
+        // reset token_buffer (ignore opening quote)
+        reset();
+
+        // we entered the function by reading an open quote
+        JSON_ASSERT(current == '\"');
+
+        while (true)
+        {
+            // get next character
+            switch (get())
+            {
+                // end of file while parsing string
+                case std::char_traits<char_type>::eof():
+                {
+                    error_message = "invalid string: missing closing quote";
+                    return token_type::parse_error;
+                }
+
+                // closing quote
+                case '\"':
+                {
+                    return token_type::value_string;
+                }
+
+                // escapes
+                case '\\':
+                {
+                    switch (get())
+                    {
+                        // quotation mark
+                        case '\"':
+                            add('\"');
+                            break;
+                        // reverse solidus
+                        case '\\':
+                            add('\\');
+                            break;
+                        // solidus
+                        case '/':
+                            add('/');
+                            break;
+                        // backspace
+                        case 'b':
+                            add('\b');
+                            break;
+                        // form feed
+                        case 'f':
+                            add('\f');
+                            break;
+                        // line feed
+                        case 'n':
+                            add('\n');
+                            break;
+                        // carriage return
+                        case 'r':
+                            add('\r');
+                            break;
+                        // tab
+                        case 't':
+                            add('\t');
+                            break;
+
+                        // unicode escapes
+                        case 'u':
+                        {
+                            const int codepoint1 = get_codepoint();
+                            int codepoint = codepoint1; // start with codepoint1
+
+                            if (JSON_HEDLEY_UNLIKELY(codepoint1 == -1))
+                            {
+                                error_message = "invalid string: '\\u' must be followed by 4 hex digits";
+                                return token_type::parse_error;
+                            }
+
+                            // check if code point is a high surrogate
+                            if (0xD800 <= codepoint1 && codepoint1 <= 0xDBFF)
+                            {
+                                // expect next \uxxxx entry
+                                if (JSON_HEDLEY_LIKELY(get() == '\\' && get() == 'u'))
+                                {
+                                    const int codepoint2 = get_codepoint();
+
+                                    if (JSON_HEDLEY_UNLIKELY(codepoint2 == -1))
+                                    {
+                                        error_message = "invalid string: '\\u' must be followed by 4 hex digits";
+                                        return token_type::parse_error;
+                                    }
+
+                                    // check if codepoint2 is a low surrogate
+                                    if (JSON_HEDLEY_LIKELY(0xDC00 <= codepoint2 && codepoint2 <= 0xDFFF))
+                                    {
+                                        // overwrite codepoint
+                                        codepoint = static_cast<int>(
+                                                        // high surrogate occupies the most significant 22 bits
+                                                        (static_cast<unsigned int>(codepoint1) << 10u)
+                                                        // low surrogate occupies the least significant 15 bits
+                                                        + static_cast<unsigned int>(codepoint2)
+                                                        // there is still the 0xD800, 0xDC00 and 0x10000 noise
+                                                        // in the result so we have to subtract with:
+                                                        // (0xD800 << 10) + DC00 - 0x10000 = 0x35FDC00
+                                                        - 0x35FDC00u);
+                                    }
+                                    else
+                                    {
+                                        error_message = "invalid string: surrogate U+D800..U+DBFF must be followed by U+DC00..U+DFFF";
+                                        return token_type::parse_error;
+                                    }
+                                }
+                                else
+                                {
+                                    error_message = "invalid string: surrogate U+D800..U+DBFF must be followed by U+DC00..U+DFFF";
+                                    return token_type::parse_error;
+                                }
+                            }
+                            else
+                            {
+                                if (JSON_HEDLEY_UNLIKELY(0xDC00 <= codepoint1 && codepoint1 <= 0xDFFF))
+                                {
+                                    error_message = "invalid string: surrogate U+DC00..U+DFFF must follow U+D800..U+DBFF";
+                                    return token_type::parse_error;
+                                }
+                            }
+
+                            // result of the above calculation yields a proper codepoint
+                            JSON_ASSERT(0x00 <= codepoint && codepoint <= 0x10FFFF);
+
+                            // translate codepoint into bytes
+                            if (codepoint < 0x80)
+                            {
+                                // 1-byte characters: 0xxxxxxx (ASCII)
+                                add(static_cast<char_int_type>(codepoint));
+                            }
+                            else if (codepoint <= 0x7FF)
+                            {
+                                // 2-byte characters: 110xxxxx 10xxxxxx
+                                add(static_cast<char_int_type>(0xC0u | (static_cast<unsigned int>(codepoint) >> 6u)));
+                                add(static_cast<char_int_type>(0x80u | (static_cast<unsigned int>(codepoint) & 0x3Fu)));
+                            }
+                            else if (codepoint <= 0xFFFF)
+                            {
+                                // 3-byte characters: 1110xxxx 10xxxxxx 10xxxxxx
+                                add(static_cast<char_int_type>(0xE0u | (static_cast<unsigned int>(codepoint) >> 12u)));
+                                add(static_cast<char_int_type>(0x80u | ((static_cast<unsigned int>(codepoint) >> 6u) & 0x3Fu)));
+                                add(static_cast<char_int_type>(0x80u | (static_cast<unsigned int>(codepoint) & 0x3Fu)));
+                            }
+                            else
+                            {
+                                // 4-byte characters: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+                                add(static_cast<char_int_type>(0xF0u | (static_cast<unsigned int>(codepoint) >> 18u)));
+                                add(static_cast<char_int_type>(0x80u | ((static_cast<unsigned int>(codepoint) >> 12u) & 0x3Fu)));
+                                add(static_cast<char_int_type>(0x80u | ((static_cast<unsigned int>(codepoint) >> 6u) & 0x3Fu)));
+                                add(static_cast<char_int_type>(0x80u | (static_cast<unsigned int>(codepoint) & 0x3Fu)));
+                            }
+
+                            break;
+                        }
+
+                        // other characters after escape
+                        default:
+                            error_message = "invalid string: forbidden character after backslash";
+                            return token_type::parse_error;
+                    }
+
+                    break;
+                }
+
+                // invalid control characters
+                case 0x00:
+                {
+                    error_message = "invalid string: control character U+0000 (NUL) must be escaped to \\u0000";
+                    return token_type::parse_error;
+                }
+
+                case 0x01:
+                {
+                    error_message = "invalid string: control character U+0001 (SOH) must be escaped to \\u0001";
+                    return token_type::parse_error;
+                }
+
+                case 0x02:
+                {
+                    error_message = "invalid string: control character U+0002 (STX) must be escaped to \\u0002";
+                    return token_type::parse_error;
+                }
+
+                case 0x03:
+                {
+                    error_message = "invalid string: control character U+0003 (ETX) must be escaped to \\u0003";
+                    return token_type::parse_error;
+                }
+
+                case 0x04:
+                {
+                    error_message = "invalid string: control character U+0004 (EOT) must be escaped to \\u0004";
+                    return token_type::parse_error;
+                }
+
+                case 0x05:
+                {
+                    error_message = "invalid string: control character U+0005 (ENQ) must be escaped to \\u0005";
+                    return token_type::parse_error;
+                }
+
+                case 0x06:
+                {
+                    error_message = "invalid string: control character U+0006 (ACK) must be escaped to \\u0006";
+                    return token_type::parse_error;
+                }
+
+                case 0x07:
+                {
+                    error_message = "invalid string: control character U+0007 (BEL) must be escaped to \\u0007";
+                    return token_type::parse_error;
+                }
+
+                case 0x08:
+                {
+                    error_message = "invalid string: control character U+0008 (BS) must be escaped to \\u0008 or \\b";
+                    return token_type::parse_error;
+                }
+
+                case 0x09:
+                {
+                    error_message = "invalid string: control character U+0009 (HT) must be escaped to \\u0009 or \\t";
+                    return token_type::parse_error;
+                }
+
+                case 0x0A:
+                {
+                    error_message = "invalid string: control character U+000A (LF) must be escaped to \\u000A or \\n";
+                    return token_type::parse_error;
+                }
+
+                case 0x0B:
+                {
+                    error_message = "invalid string: control character U+000B (VT) must be escaped to \\u000B";
+                    return token_type::parse_error;
+                }
+
+                case 0x0C:
+                {
+                    error_message = "invalid string: control character U+000C (FF) must be escaped to \\u000C or \\f";
+                    return token_type::parse_error;
+                }
+
+                case 0x0D:
+                {
+                    error_message = "invalid string: control character U+000D (CR) must be escaped to \\u000D or \\r";
+                    return token_type::parse_error;
+                }
+
+                case 0x0E:
+                {
+                    error_message = "invalid string: control character U+000E (SO) must be escaped to \\u000E";
+                    return token_type::parse_error;
+                }
+
+                case 0x0F:
+                {
+                    error_message = "invalid string: control character U+000F (SI) must be escaped to \\u000F";
+                    return token_type::parse_error;
+                }
+
+                case 0x10:
+                {
+                    error_message = "invalid string: control character U+0010 (DLE) must be escaped to \\u0010";
+                    return token_type::parse_error;
+                }
+
+                case 0x11:
+                {
+                    error_message = "invalid string: control character U+0011 (DC1) must be escaped to \\u0011";
+                    return token_type::parse_error;
+                }
+
+                case 0x12:
+                {
+                    error_message = "invalid string: control character U+0012 (DC2) must be escaped to \\u0012";
+                    return token_type::parse_error;
+                }
+
+                case 0x13:
+                {
+                    error_message = "invalid string: control character U+0013 (DC3) must be escaped to \\u0013";
+                    return token_type::parse_error;
+                }
+
+                case 0x14:
+                {
+                    error_message = "invalid string: control character U+0014 (DC4) must be escaped to \\u0014";
+                    return token_type::parse_error;
+                }
+
+                case 0x15:
+                {
+                    error_message = "invalid string: control character U+0015 (NAK) must be escaped to \\u0015";
+                    return token_type::parse_error;
+                }
+
+                case 0x16:
+                {
+                    error_message = "invalid string: control character U+0016 (SYN) must be escaped to \\u0016";
+                    return token_type::parse_error;
+                }
+
+                case 0x17:
+                {
+                    error_message = "invalid string: control character U+0017 (ETB) must be escaped to \\u0017";
+                    return token_type::parse_error;
+                }
+
+                case 0x18:
+                {
+                    error_message = "invalid string: control character U+0018 (CAN) must be escaped to \\u0018";
+                    return token_type::parse_error;
+                }
+
+                case 0x19:
+                {
+                    error_message = "invalid string: control character U+0019 (EM) must be escaped to \\u0019";
+                    return token_type::parse_error;
+                }
+
+                case 0x1A:
+                {
+                    error_message = "invalid string: control character U+001A (SUB) must be escaped to \\u001A";
+                    return token_type::parse_error;
+                }
+
+                case 0x1B:
+                {
+                    error_message = "invalid string: control character U+001B (ESC) must be escaped to \\u001B";
+                    return token_type::parse_error;
+                }
+
+                case 0x1C:
+                {
+                    error_message = "invalid string: control character U+001C (FS) must be escaped to \\u001C";
+                    return token_type::parse_error;
+                }
+
+                case 0x1D:
+                {
+                    error_message = "invalid string: control character U+001D (GS) must be escaped to \\u001D";
+                    return token_type::parse_error;
+                }
+
+                case 0x1E:
+                {
+                    error_message = "invalid string: control character U+001E (RS) must be escaped to \\u001E";
+                    return token_type::parse_error;
+                }
+
+                case 0x1F:
+                {
+                    error_message = "invalid string: control character U+001F (US) must be escaped to \\u001F";
+                    return token_type::parse_error;
+                }
+
+                // U+0020..U+007F (except U+0022 (quote) and U+005C (backspace))
+                case 0x20:
+                case 0x21:
+                case 0x23:
+                case 0x24:
+                case 0x25:
+                case 0x26:
+                case 0x27:
+                case 0x28:
+                case 0x29:
+                case 0x2A:
+                case 0x2B:
+                case 0x2C:
+                case 0x2D:
+                case 0x2E:
+                case 0x2F:
+                case 0x30:
+                case 0x31:
+                case 0x32:
+                case 0x33:
+                case 0x34:
+                case 0x35:
+                case 0x36:
+                case 0x37:
+                case 0x38:
+                case 0x39:
+                case 0x3A:
+                case 0x3B:
+                case 0x3C:
+                case 0x3D:
+                case 0x3E:
+                case 0x3F:
+                case 0x40:
+                case 0x41:
+                case 0x42:
+                case 0x43:
+                case 0x44:
+                case 0x45:
+                case 0x46:
+                case 0x47:
+                case 0x48:
+                case 0x49:
+                case 0x4A:
+                case 0x4B:
+                case 0x4C:
+                case 0x4D:
+                case 0x4E:
+                case 0x4F:
+                case 0x50:
+                case 0x51:
+                case 0x52:
+                case 0x53:
+                case 0x54:
+                case 0x55:
+                case 0x56:
+                case 0x57:
+                case 0x58:
+                case 0x59:
+                case 0x5A:
+                case 0x5B:
+                case 0x5D:
+                case 0x5E:
+                case 0x5F:
+                case 0x60:
+                case 0x61:
+                case 0x62:
+                case 0x63:
+                case 0x64:
+                case 0x65:
+                case 0x66:
+                case 0x67:
+                case 0x68:
+                case 0x69:
+                case 0x6A:
+                case 0x6B:
+                case 0x6C:
+                case 0x6D:
+                case 0x6E:
+                case 0x6F:
+                case 0x70:
+                case 0x71:
+                case 0x72:
+                case 0x73:
+                case 0x74:
+                case 0x75:
+                case 0x76:
+                case 0x77:
+                case 0x78:
+                case 0x79:
+                case 0x7A:
+                case 0x7B:
+                case 0x7C:
+                case 0x7D:
+                case 0x7E:
+                case 0x7F:
+                {
+                    add(current);
+                    break;
+                }
+
+                // U+0080..U+07FF: bytes C2..DF 80..BF
+                case 0xC2:
+                case 0xC3:
+                case 0xC4:
+                case 0xC5:
+                case 0xC6:
+                case 0xC7:
+                case 0xC8:
+                case 0xC9:
+                case 0xCA:
+                case 0xCB:
+                case 0xCC:
+                case 0xCD:
+                case 0xCE:
+                case 0xCF:
+                case 0xD0:
+                case 0xD1:
+                case 0xD2:
+                case 0xD3:
+                case 0xD4:
+                case 0xD5:
+                case 0xD6:
+                case 0xD7:
+                case 0xD8:
+                case 0xD9:
+                case 0xDA:
+                case 0xDB:
+                case 0xDC:
+                case 0xDD:
+                case 0xDE:
+                case 0xDF:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!next_byte_in_range({0x80, 0xBF})))
+                    {
+                        return token_type::parse_error;
+                    }
+                    break;
+                }
+
+                // U+0800..U+0FFF: bytes E0 A0..BF 80..BF
+                case 0xE0:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0xA0, 0xBF, 0x80, 0xBF}))))
+                    {
+                        return token_type::parse_error;
+                    }
+                    break;
+                }
+
+                // U+1000..U+CFFF: bytes E1..EC 80..BF 80..BF
+                // U+E000..U+FFFF: bytes EE..EF 80..BF 80..BF
+                case 0xE1:
+                case 0xE2:
+                case 0xE3:
+                case 0xE4:
+                case 0xE5:
+                case 0xE6:
+                case 0xE7:
+                case 0xE8:
+                case 0xE9:
+                case 0xEA:
+                case 0xEB:
+                case 0xEC:
+                case 0xEE:
+                case 0xEF:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0xBF, 0x80, 0xBF}))))
+                    {
+                        return token_type::parse_error;
+                    }
+                    break;
+                }
+
+                // U+D000..U+D7FF: bytes ED 80..9F 80..BF
+                case 0xED:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0x9F, 0x80, 0xBF}))))
+                    {
+                        return token_type::parse_error;
+                    }
+                    break;
+                }
+
+                // U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
+                case 0xF0:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x90, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
+                    {
+                        return token_type::parse_error;
+                    }
+                    break;
+                }
+
+                // U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
+                case 0xF1:
+                case 0xF2:
+                case 0xF3:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
+                    {
+                        return token_type::parse_error;
+                    }
+                    break;
+                }
+
+                // U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
+                case 0xF4:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0x8F, 0x80, 0xBF, 0x80, 0xBF}))))
+                    {
+                        return token_type::parse_error;
+                    }
+                    break;
+                }
+
+                // remaining bytes (80..C1 and F5..FF) are ill-formed
+                default:
+                {
+                    error_message = "invalid string: ill-formed UTF-8 byte";
+                    return token_type::parse_error;
+                }
+            }
+        }
+    }
+
+    /*!
+     * @brief scan a comment
+     * @return whether comment could be scanned successfully
+     */
+    bool scan_comment()
+    {
+        switch (get())
+        {
+            // single-line comments skip input until a newline or EOF is read
+            case '/':
+            {
+                while (true)
+                {
+                    switch (get())
+                    {
+                        case '\n':
+                        case '\r':
+                        case std::char_traits<char_type>::eof():
+                        case '\0':
+                            return true;
+
+                        default:
+                            break;
+                    }
+                }
+            }
+
+            // multi-line comments skip input until */ is read
+            case '*':
+            {
+                while (true)
+                {
+                    switch (get())
+                    {
+                        case std::char_traits<char_type>::eof():
+                        case '\0':
+                        {
+                            error_message = "invalid comment; missing closing '*/'";
+                            return false;
+                        }
+
+                        case '*':
+                        {
+                            switch (get())
+                            {
+                                case '/':
+                                    return true;
+
+                                default:
+                                {
+                                    unget();
+                                    continue;
+                                }
+                            }
+                        }
+
+                        default:
+                            continue;
+                    }
+                }
+            }
+
+            // unexpected character after reading '/'
+            default:
+            {
+                error_message = "invalid comment; expecting '/' or '*' after '/'";
+                return false;
+            }
+        }
+    }
+
+    JSON_HEDLEY_NON_NULL(2)
+    static void strtof(float& f, const char* str, char** endptr) noexcept
+    {
+        f = std::strtof(str, endptr);
+    }
+
+    JSON_HEDLEY_NON_NULL(2)
+    static void strtof(double& f, const char* str, char** endptr) noexcept
+    {
+        f = std::strtod(str, endptr);
+    }
+
+    JSON_HEDLEY_NON_NULL(2)
+    static void strtof(long double& f, const char* str, char** endptr) noexcept
+    {
+        f = std::strtold(str, endptr);
+    }
+
+    /*!
+    @brief scan a number literal
+
+    This function scans a string according to Sect. 6 of RFC 8259.
+
+    The function is realized with a deterministic finite state machine derived
+    from the grammar described in RFC 8259. Starting in state "init", the
+    input is read and used to determined the next state. Only state "done"
+    accepts the number. State "error" is a trap state to model errors. In the
+    table below, "anything" means any character but the ones listed before.
+
+    state    | 0        | 1-9      | e E      | +       | -       | .        | anything
+    ---------|----------|----------|----------|---------|---------|----------|-----------
+    init     | zero     | any1     | [error]  | [error] | minus   | [error]  | [error]
+    minus    | zero     | any1     | [error]  | [error] | [error] | [error]  | [error]
+    zero     | done     | done     | exponent | done    | done    | decimal1 | done
+    any1     | any1     | any1     | exponent | done    | done    | decimal1 | done
+    decimal1 | decimal2 | decimal2 | [error]  | [error] | [error] | [error]  | [error]
+    decimal2 | decimal2 | decimal2 | exponent | done    | done    | done     | done
+    exponent | any2     | any2     | [error]  | sign    | sign    | [error]  | [error]
+    sign     | any2     | any2     | [error]  | [error] | [error] | [error]  | [error]
+    any2     | any2     | any2     | done     | done    | done    | done     | done
+
+    The state machine is realized with one label per state (prefixed with
+    "scan_number_") and `goto` statements between them. The state machine
+    contains cycles, but any cycle can be left when EOF is read. Therefore,
+    the function is guaranteed to terminate.
+
+    During scanning, the read bytes are stored in token_buffer. This string is
+    then converted to a signed integer, an unsigned integer, or a
+    floating-point number.
+
+    @return token_type::value_unsigned, token_type::value_integer, or
+            token_type::value_float if number could be successfully scanned,
+            token_type::parse_error otherwise
+
+    @note The scanner is independent of the current locale. Internally, the
+          locale's decimal point is used instead of `.` to work with the
+          locale-dependent converters.
+    */
+    token_type scan_number()  // lgtm [cpp/use-of-goto]
+    {
+        // reset token_buffer to store the number's bytes
+        reset();
+
+        // the type of the parsed number; initially set to unsigned; will be
+        // changed if minus sign, decimal point or exponent is read
+        token_type number_type = token_type::value_unsigned;
+
+        // state (init): we just found out we need to scan a number
+        switch (current)
+        {
+            case '-':
+            {
+                add(current);
+                goto scan_number_minus;
+            }
+
+            case '0':
+            {
+                add(current);
+                goto scan_number_zero;
+            }
+
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_any1;
+            }
+
+            // all other characters are rejected outside scan_number()
+            default:            // LCOV_EXCL_LINE
+                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+        }
+
+scan_number_minus:
+        // state: we just parsed a leading minus sign
+        number_type = token_type::value_integer;
+        switch (get())
+        {
+            case '0':
+            {
+                add(current);
+                goto scan_number_zero;
+            }
+
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_any1;
+            }
+
+            default:
+            {
+                error_message = "invalid number; expected digit after '-'";
+                return token_type::parse_error;
+            }
+        }
+
+scan_number_zero:
+        // state: we just parse a zero (maybe with a leading minus sign)
+        switch (get())
+        {
+            case '.':
+            {
+                add(decimal_point_char);
+                goto scan_number_decimal1;
+            }
+
+            case 'e':
+            case 'E':
+            {
+                add(current);
+                goto scan_number_exponent;
+            }
+
+            default:
+                goto scan_number_done;
+        }
+
+scan_number_any1:
+        // state: we just parsed a number 0-9 (maybe with a leading minus sign)
+        switch (get())
+        {
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_any1;
+            }
+
+            case '.':
+            {
+                add(decimal_point_char);
+                goto scan_number_decimal1;
+            }
+
+            case 'e':
+            case 'E':
+            {
+                add(current);
+                goto scan_number_exponent;
+            }
+
+            default:
+                goto scan_number_done;
+        }
+
+scan_number_decimal1:
+        // state: we just parsed a decimal point
+        number_type = token_type::value_float;
+        switch (get())
+        {
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_decimal2;
+            }
+
+            default:
+            {
+                error_message = "invalid number; expected digit after '.'";
+                return token_type::parse_error;
+            }
+        }
+
+scan_number_decimal2:
+        // we just parsed at least one number after a decimal point
+        switch (get())
+        {
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_decimal2;
+            }
+
+            case 'e':
+            case 'E':
+            {
+                add(current);
+                goto scan_number_exponent;
+            }
+
+            default:
+                goto scan_number_done;
+        }
+
+scan_number_exponent:
+        // we just parsed an exponent
+        number_type = token_type::value_float;
+        switch (get())
+        {
+            case '+':
+            case '-':
+            {
+                add(current);
+                goto scan_number_sign;
+            }
+
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_any2;
+            }
+
+            default:
+            {
+                error_message =
+                    "invalid number; expected '+', '-', or digit after exponent";
+                return token_type::parse_error;
+            }
+        }
+
+scan_number_sign:
+        // we just parsed an exponent sign
+        switch (get())
+        {
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_any2;
+            }
+
+            default:
+            {
+                error_message = "invalid number; expected digit after exponent sign";
+                return token_type::parse_error;
+            }
+        }
+
+scan_number_any2:
+        // we just parsed a number after the exponent or exponent sign
+        switch (get())
+        {
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            {
+                add(current);
+                goto scan_number_any2;
+            }
+
+            default:
+                goto scan_number_done;
+        }
+
+scan_number_done:
+        // unget the character after the number (we only read it to know that
+        // we are done scanning a number)
+        unget();
+
+        char* endptr = nullptr; // NOLINT(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+        errno = 0;
+
+        // try to parse integers first and fall back to floats
+        if (number_type == token_type::value_unsigned)
+        {
+            const auto x = std::strtoull(token_buffer.data(), &endptr, 10);
+
+            // we checked the number format before
+            JSON_ASSERT(endptr == token_buffer.data() + token_buffer.size());
+
+            if (errno == 0)
+            {
+                value_unsigned = static_cast<number_unsigned_t>(x);
+                if (value_unsigned == x)
+                {
+                    return token_type::value_unsigned;
+                }
+            }
+        }
+        else if (number_type == token_type::value_integer)
+        {
+            const auto x = std::strtoll(token_buffer.data(), &endptr, 10);
+
+            // we checked the number format before
+            JSON_ASSERT(endptr == token_buffer.data() + token_buffer.size());
+
+            if (errno == 0)
+            {
+                value_integer = static_cast<number_integer_t>(x);
+                if (value_integer == x)
+                {
+                    return token_type::value_integer;
+                }
+            }
+        }
+
+        // this code is reached if we parse a floating-point number or if an
+        // integer conversion above failed
+        strtof(value_float, token_buffer.data(), &endptr);
+
+        // we checked the number format before
+        JSON_ASSERT(endptr == token_buffer.data() + token_buffer.size());
+
+        return token_type::value_float;
+    }
+
+    /*!
+    @param[in] literal_text  the literal text to expect
+    @param[in] length        the length of the passed literal text
+    @param[in] return_type   the token type to return on success
+    */
+    JSON_HEDLEY_NON_NULL(2)
+    token_type scan_literal(const char_type* literal_text, const std::size_t length,
+                            token_type return_type)
+    {
+        JSON_ASSERT(std::char_traits<char_type>::to_char_type(current) == literal_text[0]);
+        for (std::size_t i = 1; i < length; ++i)
+        {
+            if (JSON_HEDLEY_UNLIKELY(std::char_traits<char_type>::to_char_type(get()) != literal_text[i]))
+            {
+                error_message = "invalid literal";
+                return token_type::parse_error;
+            }
+        }
+        return return_type;
+    }
+
+    /////////////////////
+    // input management
+    /////////////////////
+
+    /// reset token_buffer; current character is beginning of token
+    void reset() noexcept
+    {
+        token_buffer.clear();
+        token_string.clear();
+        token_string.push_back(std::char_traits<char_type>::to_char_type(current));
+    }
+
+    /*
+    @brief get next character from the input
+
+    This function provides the interface to the used input adapter. It does
+    not throw in case the input reached EOF, but returns a
+    `std::char_traits<char>::eof()` in that case.  Stores the scanned characters
+    for use in error messages.
+
+    @return character read from the input
+    */
+    char_int_type get()
+    {
+        ++position.chars_read_total;
+        ++position.chars_read_current_line;
+
+        if (next_unget)
+        {
+            // just reset the next_unget variable and work with current
+            next_unget = false;
+        }
+        else
+        {
+            current = ia.get_character();
+        }
+
+        if (JSON_HEDLEY_LIKELY(current != std::char_traits<char_type>::eof()))
+        {
+            token_string.push_back(std::char_traits<char_type>::to_char_type(current));
+        }
+
+        if (current == '\n')
+        {
+            ++position.lines_read;
+            position.chars_read_current_line = 0;
+        }
+
+        return current;
+    }
+
+    /*!
+    @brief unget current character (read it again on next get)
+
+    We implement unget by setting variable next_unget to true. The input is not
+    changed - we just simulate ungetting by modifying chars_read_total,
+    chars_read_current_line, and token_string. The next call to get() will
+    behave as if the unget character is read again.
+    */
+    void unget()
+    {
+        next_unget = true;
+
+        --position.chars_read_total;
+
+        // in case we "unget" a newline, we have to also decrement the lines_read
+        if (position.chars_read_current_line == 0)
+        {
+            if (position.lines_read > 0)
+            {
+                --position.lines_read;
+            }
+        }
+        else
+        {
+            --position.chars_read_current_line;
+        }
+
+        if (JSON_HEDLEY_LIKELY(current != std::char_traits<char_type>::eof()))
+        {
+            JSON_ASSERT(!token_string.empty());
+            token_string.pop_back();
+        }
+    }
+
+    /// add a character to token_buffer
+    void add(char_int_type c)
+    {
+        token_buffer.push_back(static_cast<typename string_t::value_type>(c));
+    }
+
+  public:
+    /////////////////////
+    // value getters
+    /////////////////////
+
+    /// return integer value
+    constexpr number_integer_t get_number_integer() const noexcept
+    {
+        return value_integer;
+    }
+
+    /// return unsigned integer value
+    constexpr number_unsigned_t get_number_unsigned() const noexcept
+    {
+        return value_unsigned;
+    }
+
+    /// return floating-point value
+    constexpr number_float_t get_number_float() const noexcept
+    {
+        return value_float;
+    }
+
+    /// return current string value (implicitly resets the token; useful only once)
+    string_t& get_string()
+    {
+        return token_buffer;
+    }
+
+    /////////////////////
+    // diagnostics
+    /////////////////////
+
+    /// return position of last read token
+    constexpr position_t get_position() const noexcept
+    {
+        return position;
+    }
+
+    /// return the last read token (for errors only).  Will never contain EOF
+    /// (an arbitrary value that is not a valid char value, often -1), because
+    /// 255 may legitimately occur.  May contain NUL, which should be escaped.
+    std::string get_token_string() const
+    {
+        // escape control characters
+        std::string result;
+        for (const auto c : token_string)
+        {
+            if (static_cast<unsigned char>(c) <= '\x1F')
+            {
+                // escape control characters
+                std::array<char, 9> cs{{}};
+                (std::snprintf)(cs.data(), cs.size(), "<U+%.4X>", static_cast<unsigned char>(c)); // NOLINT(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+                result += cs.data();
+            }
+            else
+            {
+                // add character as is
+                result.push_back(static_cast<std::string::value_type>(c));
+            }
+        }
+
+        return result;
+    }
+
+    /// return syntax error message
+    JSON_HEDLEY_RETURNS_NON_NULL
+    constexpr const char* get_error_message() const noexcept
+    {
+        return error_message;
+    }
+
+    /////////////////////
+    // actual scanner
+    /////////////////////
+
+    /*!
+    @brief skip the UTF-8 byte order mark
+    @return true iff there is no BOM or the correct BOM has been skipped
+    */
+    bool skip_bom()
+    {
+        if (get() == 0xEF)
+        {
+            // check if we completely parse the BOM
+            return get() == 0xBB && get() == 0xBF;
+        }
+
+        // the first character is not the beginning of the BOM; unget it to
+        // process is later
+        unget();
+        return true;
+    }
+
+    void skip_whitespace()
+    {
+        do
+        {
+            get();
+        }
+        while (current == ' ' || current == '\t' || current == '\n' || current == '\r');
+    }
+
+    token_type scan()
+    {
+        // initially, skip the BOM
+        if (position.chars_read_total == 0 && !skip_bom())
+        {
+            error_message = "invalid BOM; must be 0xEF 0xBB 0xBF if given";
+            return token_type::parse_error;
+        }
+
+        // read next character and ignore whitespace
+        skip_whitespace();
+
+        // ignore comments
+        while (ignore_comments && current == '/')
+        {
+            if (!scan_comment())
+            {
+                return token_type::parse_error;
+            }
+
+            // skip following whitespace
+            skip_whitespace();
+        }
+
+        switch (current)
+        {
+            // structural characters
+            case '[':
+                return token_type::begin_array;
+            case ']':
+                return token_type::end_array;
+            case '{':
+                return token_type::begin_object;
+            case '}':
+                return token_type::end_object;
+            case ':':
+                return token_type::name_separator;
+            case ',':
+                return token_type::value_separator;
+
+            // literals
+            case 't':
+            {
+                std::array<char_type, 4> true_literal = {{char_type('t'), char_type('r'), char_type('u'), char_type('e')}};
+                return scan_literal(true_literal.data(), true_literal.size(), token_type::literal_true);
+            }
+            case 'f':
+            {
+                std::array<char_type, 5> false_literal = {{char_type('f'), char_type('a'), char_type('l'), char_type('s'), char_type('e')}};
+                return scan_literal(false_literal.data(), false_literal.size(), token_type::literal_false);
+            }
+            case 'n':
+            {
+                std::array<char_type, 4> null_literal = {{char_type('n'), char_type('u'), char_type('l'), char_type('l')}};
+                return scan_literal(null_literal.data(), null_literal.size(), token_type::literal_null);
+            }
+
+            // string
+            case '\"':
+                return scan_string();
+
+            // number
+            case '-':
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+                return scan_number();
+
+            // end of input (the null byte is needed when parsing from
+            // string literals)
+            case '\0':
+            case std::char_traits<char_type>::eof():
+                return token_type::end_of_input;
+
+            // error
+            default:
+                error_message = "invalid literal";
+                return token_type::parse_error;
+        }
+    }
+
+  private:
+    /// input adapter
+    InputAdapterType ia;
+
+    /// whether comments should be ignored (true) or signaled as errors (false)
+    const bool ignore_comments = false;
+
+    /// the current character
+    char_int_type current = std::char_traits<char_type>::eof();
+
+    /// whether the next get() call should just return current
+    bool next_unget = false;
+
+    /// the start position of the current token
+    position_t position {};
+
+    /// raw input token string (for error messages)
+    std::vector<char_type> token_string {};
+
+    /// buffer for variable-length tokens (numbers, strings)
+    string_t token_buffer {};
+
+    /// a description of occurred lexer errors
+    const char* error_message = "";
+
+    // number values
+    number_integer_t value_integer = 0;
+    number_unsigned_t value_unsigned = 0;
+    number_float_t value_float = 0;
+
+    /// the decimal point
+    const char_int_type decimal_point_char = '.';
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/meta/is_sax.hpp>
+
+
+#include <cstdint> // size_t
+#include <utility> // declval
+#include <string> // string
+
+// #include <nlohmann/detail/meta/detected.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename T>
+using null_function_t = decltype(std::declval<T&>().null());
+
+template<typename T>
+using boolean_function_t =
+    decltype(std::declval<T&>().boolean(std::declval<bool>()));
+
+template<typename T, typename Integer>
+using number_integer_function_t =
+    decltype(std::declval<T&>().number_integer(std::declval<Integer>()));
+
+template<typename T, typename Unsigned>
+using number_unsigned_function_t =
+    decltype(std::declval<T&>().number_unsigned(std::declval<Unsigned>()));
+
+template<typename T, typename Float, typename String>
+using number_float_function_t = decltype(std::declval<T&>().number_float(
+                                    std::declval<Float>(), std::declval<const String&>()));
+
+template<typename T, typename String>
+using string_function_t =
+    decltype(std::declval<T&>().string(std::declval<String&>()));
+
+template<typename T, typename Binary>
+using binary_function_t =
+    decltype(std::declval<T&>().binary(std::declval<Binary&>()));
+
+template<typename T>
+using start_object_function_t =
+    decltype(std::declval<T&>().start_object(std::declval<std::size_t>()));
+
+template<typename T, typename String>
+using key_function_t =
+    decltype(std::declval<T&>().key(std::declval<String&>()));
+
+template<typename T>
+using end_object_function_t = decltype(std::declval<T&>().end_object());
+
+template<typename T>
+using start_array_function_t =
+    decltype(std::declval<T&>().start_array(std::declval<std::size_t>()));
+
+template<typename T>
+using end_array_function_t = decltype(std::declval<T&>().end_array());
+
+template<typename T, typename Exception>
+using parse_error_function_t = decltype(std::declval<T&>().parse_error(
+        std::declval<std::size_t>(), std::declval<const std::string&>(),
+        std::declval<const Exception&>()));
+
+template<typename SAX, typename BasicJsonType>
+struct is_sax
+{
+  private:
+    static_assert(is_basic_json<BasicJsonType>::value,
+                  "BasicJsonType must be of type basic_json<...>");
+
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+    using exception_t = typename BasicJsonType::exception;
+
+  public:
+    static constexpr bool value =
+        is_detected_exact<bool, null_function_t, SAX>::value &&
+        is_detected_exact<bool, boolean_function_t, SAX>::value &&
+        is_detected_exact<bool, number_integer_function_t, SAX, number_integer_t>::value &&
+        is_detected_exact<bool, number_unsigned_function_t, SAX, number_unsigned_t>::value &&
+        is_detected_exact<bool, number_float_function_t, SAX, number_float_t, string_t>::value &&
+        is_detected_exact<bool, string_function_t, SAX, string_t>::value &&
+        is_detected_exact<bool, binary_function_t, SAX, binary_t>::value &&
+        is_detected_exact<bool, start_object_function_t, SAX>::value &&
+        is_detected_exact<bool, key_function_t, SAX, string_t>::value &&
+        is_detected_exact<bool, end_object_function_t, SAX>::value &&
+        is_detected_exact<bool, start_array_function_t, SAX>::value &&
+        is_detected_exact<bool, end_array_function_t, SAX>::value &&
+        is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value;
+};
+
+template<typename SAX, typename BasicJsonType>
+struct is_sax_static_asserts
+{
+  private:
+    static_assert(is_basic_json<BasicJsonType>::value,
+                  "BasicJsonType must be of type basic_json<...>");
+
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+    using exception_t = typename BasicJsonType::exception;
+
+  public:
+    static_assert(is_detected_exact<bool, null_function_t, SAX>::value,
+                  "Missing/invalid function: bool null()");
+    static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+                  "Missing/invalid function: bool boolean(bool)");
+    static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+                  "Missing/invalid function: bool boolean(bool)");
+    static_assert(
+        is_detected_exact<bool, number_integer_function_t, SAX,
+        number_integer_t>::value,
+        "Missing/invalid function: bool number_integer(number_integer_t)");
+    static_assert(
+        is_detected_exact<bool, number_unsigned_function_t, SAX,
+        number_unsigned_t>::value,
+        "Missing/invalid function: bool number_unsigned(number_unsigned_t)");
+    static_assert(is_detected_exact<bool, number_float_function_t, SAX,
+                  number_float_t, string_t>::value,
+                  "Missing/invalid function: bool number_float(number_float_t, const string_t&)");
+    static_assert(
+        is_detected_exact<bool, string_function_t, SAX, string_t>::value,
+        "Missing/invalid function: bool string(string_t&)");
+    static_assert(
+        is_detected_exact<bool, binary_function_t, SAX, binary_t>::value,
+        "Missing/invalid function: bool binary(binary_t&)");
+    static_assert(is_detected_exact<bool, start_object_function_t, SAX>::value,
+                  "Missing/invalid function: bool start_object(std::size_t)");
+    static_assert(is_detected_exact<bool, key_function_t, SAX, string_t>::value,
+                  "Missing/invalid function: bool key(string_t&)");
+    static_assert(is_detected_exact<bool, end_object_function_t, SAX>::value,
+                  "Missing/invalid function: bool end_object()");
+    static_assert(is_detected_exact<bool, start_array_function_t, SAX>::value,
+                  "Missing/invalid function: bool start_array(std::size_t)");
+    static_assert(is_detected_exact<bool, end_array_function_t, SAX>::value,
+                  "Missing/invalid function: bool end_array()");
+    static_assert(
+        is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value,
+        "Missing/invalid function: bool parse_error(std::size_t, const "
+        "std::string&, const exception&)");
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+
+/// how to treat CBOR tags
+enum class cbor_tag_handler_t
+{
+    error,   ///< throw a parse_error exception in case of a tag
+    ignore,  ///< ignore tags
+    store    ///< store tags as binary type
+};
+
+/*!
+@brief determine system byte order
+
+@return true if and only if system's byte order is little endian
+
+@note from https://stackoverflow.com/a/1001328/266378
+*/
+static inline bool little_endianess(int num = 1) noexcept
+{
+    return *reinterpret_cast<char*>(&num) == 1;
+}
+
+
+///////////////////
+// binary reader //
+///////////////////
+
+/*!
+@brief deserialization of CBOR, MessagePack, and UBJSON values
+*/
+template<typename BasicJsonType, typename InputAdapterType, typename SAX = json_sax_dom_parser<BasicJsonType>>
+class binary_reader
+{
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+    using json_sax_t = SAX;
+    using char_type = typename InputAdapterType::char_type;
+    using char_int_type = typename std::char_traits<char_type>::int_type;
+
+  public:
+    /*!
+    @brief create a binary reader
+
+    @param[in] adapter  input adapter to read from
+    */
+    explicit binary_reader(InputAdapterType&& adapter) noexcept : ia(std::move(adapter))
+    {
+        (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
+    }
+
+    // make class move-only
+    binary_reader(const binary_reader&) = delete;
+    binary_reader(binary_reader&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    binary_reader& operator=(const binary_reader&) = delete;
+    binary_reader& operator=(binary_reader&&) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
+    ~binary_reader() = default;
+
+    /*!
+    @param[in] format  the binary format to parse
+    @param[in] sax_    a SAX event processor
+    @param[in] strict  whether to expect the input to be consumed completed
+    @param[in] tag_handler  how to treat CBOR tags
+
+    @return whether parsing was successful
+    */
+    JSON_HEDLEY_NON_NULL(3)
+    bool sax_parse(const input_format_t format,
+                   json_sax_t* sax_,
+                   const bool strict = true,
+                   const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error)
+    {
+        sax = sax_;
+        bool result = false;
+
+        switch (format)
+        {
+            case input_format_t::bson:
+                result = parse_bson_internal();
+                break;
+
+            case input_format_t::cbor:
+                result = parse_cbor_internal(true, tag_handler);
+                break;
+
+            case input_format_t::msgpack:
+                result = parse_msgpack_internal();
+                break;
+
+            case input_format_t::ubjson:
+                result = parse_ubjson_internal();
+                break;
+
+            case input_format_t::json: // LCOV_EXCL_LINE
+            default:            // LCOV_EXCL_LINE
+                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+        }
+
+        // strict mode: next byte must be EOF
+        if (result && strict)
+        {
+            if (format == input_format_t::ubjson)
+            {
+                get_ignore_noop();
+            }
+            else
+            {
+                get();
+            }
+
+            if (JSON_HEDLEY_UNLIKELY(current != std::char_traits<char_type>::eof()))
+            {
+                return sax->parse_error(chars_read, get_token_string(),
+                                        parse_error::create(110, chars_read, exception_message(format, "expected end of input; last byte: 0x" + get_token_string(), "value"), BasicJsonType()));
+            }
+        }
+
+        return result;
+    }
+
+  private:
+    //////////
+    // BSON //
+    //////////
+
+    /*!
+    @brief Reads in a BSON-object and passes it to the SAX-parser.
+    @return whether a valid BSON-value was passed to the SAX parser
+    */
+    bool parse_bson_internal()
+    {
+        std::int32_t document_size{};
+        get_number<std::int32_t, true>(input_format_t::bson, document_size);
+
+        if (JSON_HEDLEY_UNLIKELY(!sax->start_object(std::size_t(-1))))
+        {
+            return false;
+        }
+
+        if (JSON_HEDLEY_UNLIKELY(!parse_bson_element_list(/*is_array*/false)))
+        {
+            return false;
+        }
+
+        return sax->end_object();
+    }
+
+    /*!
+    @brief Parses a C-style string from the BSON input.
+    @param[in,out] result  A reference to the string variable where the read
+                            string is to be stored.
+    @return `true` if the \x00-byte indicating the end of the string was
+             encountered before the EOF; false` indicates an unexpected EOF.
+    */
+    bool get_bson_cstr(string_t& result)
+    {
+        auto out = std::back_inserter(result);
+        while (true)
+        {
+            get();
+            if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::bson, "cstring")))
+            {
+                return false;
+            }
+            if (current == 0x00)
+            {
+                return true;
+            }
+            *out++ = static_cast<typename string_t::value_type>(current);
+        }
+    }
+
+    /*!
+    @brief Parses a zero-terminated string of length @a len from the BSON
+           input.
+    @param[in] len  The length (including the zero-byte at the end) of the
+                    string to be read.
+    @param[in,out] result  A reference to the string variable where the read
+                            string is to be stored.
+    @tparam NumberType The type of the length @a len
+    @pre len >= 1
+    @return `true` if the string was successfully parsed
+    */
+    template<typename NumberType>
+    bool get_bson_string(const NumberType len, string_t& result)
+    {
+        if (JSON_HEDLEY_UNLIKELY(len < 1))
+        {
+            auto last_token = get_token_string();
+            return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::bson, "string length must be at least 1, is " + std::to_string(len), "string"), BasicJsonType()));
+        }
+
+        return get_string(input_format_t::bson, len - static_cast<NumberType>(1), result) && get() != std::char_traits<char_type>::eof();
+    }
+
+    /*!
+    @brief Parses a byte array input of length @a len from the BSON input.
+    @param[in] len  The length of the byte array to be read.
+    @param[in,out] result  A reference to the binary variable where the read
+                            array is to be stored.
+    @tparam NumberType The type of the length @a len
+    @pre len >= 0
+    @return `true` if the byte array was successfully parsed
+    */
+    template<typename NumberType>
+    bool get_bson_binary(const NumberType len, binary_t& result)
+    {
+        if (JSON_HEDLEY_UNLIKELY(len < 0))
+        {
+            auto last_token = get_token_string();
+            return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::bson, "byte array length cannot be negative, is " + std::to_string(len), "binary"), BasicJsonType()));
+        }
+
+        // All BSON binary values have a subtype
+        std::uint8_t subtype{};
+        get_number<std::uint8_t>(input_format_t::bson, subtype);
+        result.set_subtype(subtype);
+
+        return get_binary(input_format_t::bson, len, result);
+    }
+
+    /*!
+    @brief Read a BSON document element of the given @a element_type.
+    @param[in] element_type The BSON element type, c.f. http://bsonspec.org/spec.html
+    @param[in] element_type_parse_position The position in the input stream,
+               where the `element_type` was read.
+    @warning Not all BSON element types are supported yet. An unsupported
+             @a element_type will give rise to a parse_error.114:
+             Unsupported BSON record type 0x...
+    @return whether a valid BSON-object/array was passed to the SAX parser
+    */
+    bool parse_bson_element_internal(const char_int_type element_type,
+                                     const std::size_t element_type_parse_position)
+    {
+        switch (element_type)
+        {
+            case 0x01: // double
+            {
+                double number{};
+                return get_number<double, true>(input_format_t::bson, number) && sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
+            case 0x02: // string
+            {
+                std::int32_t len{};
+                string_t value;
+                return get_number<std::int32_t, true>(input_format_t::bson, len) && get_bson_string(len, value) && sax->string(value);
+            }
+
+            case 0x03: // object
+            {
+                return parse_bson_internal();
+            }
+
+            case 0x04: // array
+            {
+                return parse_bson_array();
+            }
+
+            case 0x05: // binary
+            {
+                std::int32_t len{};
+                binary_t value;
+                return get_number<std::int32_t, true>(input_format_t::bson, len) && get_bson_binary(len, value) && sax->binary(value);
+            }
+
+            case 0x08: // boolean
+            {
+                return sax->boolean(get() != 0);
+            }
+
+            case 0x0A: // null
+            {
+                return sax->null();
+            }
+
+            case 0x10: // int32
+            {
+                std::int32_t value{};
+                return get_number<std::int32_t, true>(input_format_t::bson, value) && sax->number_integer(value);
+            }
+
+            case 0x12: // int64
+            {
+                std::int64_t value{};
+                return get_number<std::int64_t, true>(input_format_t::bson, value) && sax->number_integer(value);
+            }
+
+            default: // anything else not supported (yet)
+            {
+                std::array<char, 3> cr{{}};
+                (std::snprintf)(cr.data(), cr.size(), "%.2hhX", static_cast<unsigned char>(element_type)); // NOLINT(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+                return sax->parse_error(element_type_parse_position, std::string(cr.data()), parse_error::create(114, element_type_parse_position, "Unsupported BSON record type 0x" + std::string(cr.data()), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @brief Read a BSON element list (as specified in the BSON-spec)
+
+    The same binary layout is used for objects and arrays, hence it must be
+    indicated with the argument @a is_array which one is expected
+    (true --> array, false --> object).
+
+    @param[in] is_array Determines if the element list being read is to be
+                        treated as an object (@a is_array == false), or as an
+                        array (@a is_array == true).
+    @return whether a valid BSON-object/array was passed to the SAX parser
+    */
+    bool parse_bson_element_list(const bool is_array)
+    {
+        string_t key;
+
+        while (auto element_type = get())
+        {
+            if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::bson, "element list")))
+            {
+                return false;
+            }
+
+            const std::size_t element_type_parse_position = chars_read;
+            if (JSON_HEDLEY_UNLIKELY(!get_bson_cstr(key)))
+            {
+                return false;
+            }
+
+            if (!is_array && !sax->key(key))
+            {
+                return false;
+            }
+
+            if (JSON_HEDLEY_UNLIKELY(!parse_bson_element_internal(element_type, element_type_parse_position)))
+            {
+                return false;
+            }
+
+            // get_bson_cstr only appends
+            key.clear();
+        }
+
+        return true;
+    }
+
+    /*!
+    @brief Reads an array from the BSON input and passes it to the SAX-parser.
+    @return whether a valid BSON-array was passed to the SAX parser
+    */
+    bool parse_bson_array()
+    {
+        std::int32_t document_size{};
+        get_number<std::int32_t, true>(input_format_t::bson, document_size);
+
+        if (JSON_HEDLEY_UNLIKELY(!sax->start_array(std::size_t(-1))))
+        {
+            return false;
+        }
+
+        if (JSON_HEDLEY_UNLIKELY(!parse_bson_element_list(/*is_array*/true)))
+        {
+            return false;
+        }
+
+        return sax->end_array();
+    }
+
+    //////////
+    // CBOR //
+    //////////
+
+    /*!
+    @param[in] get_char  whether a new character should be retrieved from the
+                         input (true) or whether the last read character should
+                         be considered instead (false)
+    @param[in] tag_handler how CBOR tags should be treated
+
+    @return whether a valid CBOR value was passed to the SAX parser
+    */
+    bool parse_cbor_internal(const bool get_char,
+                             const cbor_tag_handler_t tag_handler)
+    {
+        switch (get_char ? get() : current)
+        {
+            // EOF
+            case std::char_traits<char_type>::eof():
+                return unexpect_eof(input_format_t::cbor, "value");
+
+            // Integer 0x00..0x17 (0..23)
+            case 0x00:
+            case 0x01:
+            case 0x02:
+            case 0x03:
+            case 0x04:
+            case 0x05:
+            case 0x06:
+            case 0x07:
+            case 0x08:
+            case 0x09:
+            case 0x0A:
+            case 0x0B:
+            case 0x0C:
+            case 0x0D:
+            case 0x0E:
+            case 0x0F:
+            case 0x10:
+            case 0x11:
+            case 0x12:
+            case 0x13:
+            case 0x14:
+            case 0x15:
+            case 0x16:
+            case 0x17:
+                return sax->number_unsigned(static_cast<number_unsigned_t>(current));
+
+            case 0x18: // Unsigned integer (one-byte uint8_t follows)
+            {
+                std::uint8_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_unsigned(number);
+            }
+
+            case 0x19: // Unsigned integer (two-byte uint16_t follows)
+            {
+                std::uint16_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_unsigned(number);
+            }
+
+            case 0x1A: // Unsigned integer (four-byte uint32_t follows)
+            {
+                std::uint32_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_unsigned(number);
+            }
+
+            case 0x1B: // Unsigned integer (eight-byte uint64_t follows)
+            {
+                std::uint64_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_unsigned(number);
+            }
+
+            // Negative integer -1-0x00..-1-0x17 (-1..-24)
+            case 0x20:
+            case 0x21:
+            case 0x22:
+            case 0x23:
+            case 0x24:
+            case 0x25:
+            case 0x26:
+            case 0x27:
+            case 0x28:
+            case 0x29:
+            case 0x2A:
+            case 0x2B:
+            case 0x2C:
+            case 0x2D:
+            case 0x2E:
+            case 0x2F:
+            case 0x30:
+            case 0x31:
+            case 0x32:
+            case 0x33:
+            case 0x34:
+            case 0x35:
+            case 0x36:
+            case 0x37:
+                return sax->number_integer(static_cast<std::int8_t>(0x20 - 1 - current));
+
+            case 0x38: // Negative integer (one-byte uint8_t follows)
+            {
+                std::uint8_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
+            }
+
+            case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
+            {
+                std::uint16_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
+            }
+
+            case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
+            {
+                std::uint32_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
+            }
+
+            case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
+            {
+                std::uint64_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1)
+                        - static_cast<number_integer_t>(number));
+            }
+
+            // Binary data (0x00..0x17 bytes follow)
+            case 0x40:
+            case 0x41:
+            case 0x42:
+            case 0x43:
+            case 0x44:
+            case 0x45:
+            case 0x46:
+            case 0x47:
+            case 0x48:
+            case 0x49:
+            case 0x4A:
+            case 0x4B:
+            case 0x4C:
+            case 0x4D:
+            case 0x4E:
+            case 0x4F:
+            case 0x50:
+            case 0x51:
+            case 0x52:
+            case 0x53:
+            case 0x54:
+            case 0x55:
+            case 0x56:
+            case 0x57:
+            case 0x58: // Binary data (one-byte uint8_t for n follows)
+            case 0x59: // Binary data (two-byte uint16_t for n follow)
+            case 0x5A: // Binary data (four-byte uint32_t for n follow)
+            case 0x5B: // Binary data (eight-byte uint64_t for n follow)
+            case 0x5F: // Binary data (indefinite length)
+            {
+                binary_t b;
+                return get_cbor_binary(b) && sax->binary(b);
+            }
+
+            // UTF-8 string (0x00..0x17 bytes follow)
+            case 0x60:
+            case 0x61:
+            case 0x62:
+            case 0x63:
+            case 0x64:
+            case 0x65:
+            case 0x66:
+            case 0x67:
+            case 0x68:
+            case 0x69:
+            case 0x6A:
+            case 0x6B:
+            case 0x6C:
+            case 0x6D:
+            case 0x6E:
+            case 0x6F:
+            case 0x70:
+            case 0x71:
+            case 0x72:
+            case 0x73:
+            case 0x74:
+            case 0x75:
+            case 0x76:
+            case 0x77:
+            case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
+            case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
+            case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
+            case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
+            case 0x7F: // UTF-8 string (indefinite length)
+            {
+                string_t s;
+                return get_cbor_string(s) && sax->string(s);
+            }
+
+            // array (0x00..0x17 data items follow)
+            case 0x80:
+            case 0x81:
+            case 0x82:
+            case 0x83:
+            case 0x84:
+            case 0x85:
+            case 0x86:
+            case 0x87:
+            case 0x88:
+            case 0x89:
+            case 0x8A:
+            case 0x8B:
+            case 0x8C:
+            case 0x8D:
+            case 0x8E:
+            case 0x8F:
+            case 0x90:
+            case 0x91:
+            case 0x92:
+            case 0x93:
+            case 0x94:
+            case 0x95:
+            case 0x96:
+            case 0x97:
+                return get_cbor_array(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x1Fu), tag_handler);
+
+            case 0x98: // array (one-byte uint8_t for n follows)
+            {
+                std::uint8_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_array(static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0x99: // array (two-byte uint16_t for n follow)
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_array(static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0x9A: // array (four-byte uint32_t for n follow)
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_array(static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0x9B: // array (eight-byte uint64_t for n follow)
+            {
+                std::uint64_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_array(detail::conditional_static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0x9F: // array (indefinite length)
+                return get_cbor_array(std::size_t(-1), tag_handler);
+
+            // map (0x00..0x17 pairs of data items follow)
+            case 0xA0:
+            case 0xA1:
+            case 0xA2:
+            case 0xA3:
+            case 0xA4:
+            case 0xA5:
+            case 0xA6:
+            case 0xA7:
+            case 0xA8:
+            case 0xA9:
+            case 0xAA:
+            case 0xAB:
+            case 0xAC:
+            case 0xAD:
+            case 0xAE:
+            case 0xAF:
+            case 0xB0:
+            case 0xB1:
+            case 0xB2:
+            case 0xB3:
+            case 0xB4:
+            case 0xB5:
+            case 0xB6:
+            case 0xB7:
+                return get_cbor_object(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x1Fu), tag_handler);
+
+            case 0xB8: // map (one-byte uint8_t for n follows)
+            {
+                std::uint8_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_object(static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0xB9: // map (two-byte uint16_t for n follow)
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_object(static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0xBA: // map (four-byte uint32_t for n follow)
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_object(static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0xBB: // map (eight-byte uint64_t for n follow)
+            {
+                std::uint64_t len{};
+                return get_number(input_format_t::cbor, len) && get_cbor_object(detail::conditional_static_cast<std::size_t>(len), tag_handler);
+            }
+
+            case 0xBF: // map (indefinite length)
+                return get_cbor_object(std::size_t(-1), tag_handler);
+
+            case 0xC6: // tagged item
+            case 0xC7:
+            case 0xC8:
+            case 0xC9:
+            case 0xCA:
+            case 0xCB:
+            case 0xCC:
+            case 0xCD:
+            case 0xCE:
+            case 0xCF:
+            case 0xD0:
+            case 0xD1:
+            case 0xD2:
+            case 0xD3:
+            case 0xD4:
+            case 0xD8: // tagged item (1 bytes follow)
+            case 0xD9: // tagged item (2 bytes follow)
+            case 0xDA: // tagged item (4 bytes follow)
+            case 0xDB: // tagged item (8 bytes follow)
+            {
+                switch (tag_handler)
+                {
+                    case cbor_tag_handler_t::error:
+                    {
+                        auto last_token = get_token_string();
+                        return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::cbor, "invalid byte: 0x" + last_token, "value"), BasicJsonType()));
+                    }
+
+                    case cbor_tag_handler_t::ignore:
+                    {
+                        // ignore binary subtype
+                        switch (current)
+                        {
+                            case 0xD8:
+                            {
+                                std::uint8_t subtype_to_ignore{};
+                                get_number(input_format_t::cbor, subtype_to_ignore);
+                                break;
+                            }
+                            case 0xD9:
+                            {
+                                std::uint16_t subtype_to_ignore{};
+                                get_number(input_format_t::cbor, subtype_to_ignore);
+                                break;
+                            }
+                            case 0xDA:
+                            {
+                                std::uint32_t subtype_to_ignore{};
+                                get_number(input_format_t::cbor, subtype_to_ignore);
+                                break;
+                            }
+                            case 0xDB:
+                            {
+                                std::uint64_t subtype_to_ignore{};
+                                get_number(input_format_t::cbor, subtype_to_ignore);
+                                break;
+                            }
+                            default:
+                                break;
+                        }
+                        return parse_cbor_internal(true, tag_handler);
+                    }
+
+                    case cbor_tag_handler_t::store:
+                    {
+                        binary_t b;
+                        // use binary subtype and store in binary container
+                        switch (current)
+                        {
+                            case 0xD8:
+                            {
+                                std::uint8_t subtype{};
+                                get_number(input_format_t::cbor, subtype);
+                                b.set_subtype(detail::conditional_static_cast<typename binary_t::subtype_type>(subtype));
+                                break;
+                            }
+                            case 0xD9:
+                            {
+                                std::uint16_t subtype{};
+                                get_number(input_format_t::cbor, subtype);
+                                b.set_subtype(detail::conditional_static_cast<typename binary_t::subtype_type>(subtype));
+                                break;
+                            }
+                            case 0xDA:
+                            {
+                                std::uint32_t subtype{};
+                                get_number(input_format_t::cbor, subtype);
+                                b.set_subtype(detail::conditional_static_cast<typename binary_t::subtype_type>(subtype));
+                                break;
+                            }
+                            case 0xDB:
+                            {
+                                std::uint64_t subtype{};
+                                get_number(input_format_t::cbor, subtype);
+                                b.set_subtype(detail::conditional_static_cast<typename binary_t::subtype_type>(subtype));
+                                break;
+                            }
+                            default:
+                                return parse_cbor_internal(true, tag_handler);
+                        }
+                        get();
+                        return get_cbor_binary(b) && sax->binary(b);
+                    }
+
+                    default:                 // LCOV_EXCL_LINE
+                        JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+                        return false;        // LCOV_EXCL_LINE
+                }
+            }
+
+            case 0xF4: // false
+                return sax->boolean(false);
+
+            case 0xF5: // true
+                return sax->boolean(true);
+
+            case 0xF6: // null
+                return sax->null();
+
+            case 0xF9: // Half-Precision Float (two-byte IEEE 754)
+            {
+                const auto byte1_raw = get();
+                if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::cbor, "number")))
+                {
+                    return false;
+                }
+                const auto byte2_raw = get();
+                if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::cbor, "number")))
+                {
+                    return false;
+                }
+
+                const auto byte1 = static_cast<unsigned char>(byte1_raw);
+                const auto byte2 = static_cast<unsigned char>(byte2_raw);
+
+                // code from RFC 7049, Appendix D, Figure 3:
+                // As half-precision floating-point numbers were only added
+                // to IEEE 754 in 2008, today's programming platforms often
+                // still only have limited support for them. It is very
+                // easy to include at least decoding support for them even
+                // without such support. An example of a small decoder for
+                // half-precision floating-point numbers in the C language
+                // is shown in Fig. 3.
+                const auto half = static_cast<unsigned int>((byte1 << 8u) + byte2);
+                const double val = [&half]
+                {
+                    const int exp = (half >> 10u) & 0x1Fu;
+                    const unsigned int mant = half & 0x3FFu;
+                    JSON_ASSERT(0 <= exp&& exp <= 32);
+                    JSON_ASSERT(mant <= 1024);
+                    switch (exp)
+                    {
+                        case 0:
+                            return std::ldexp(mant, -24);
+                        case 31:
+                            return (mant == 0)
+                            ? std::numeric_limits<double>::infinity()
+                            : std::numeric_limits<double>::quiet_NaN();
+                        default:
+                            return std::ldexp(mant + 1024, exp - 25);
+                    }
+                }();
+                return sax->number_float((half & 0x8000u) != 0
+                                         ? static_cast<number_float_t>(-val)
+                                         : static_cast<number_float_t>(val), "");
+            }
+
+            case 0xFA: // Single-Precision Float (four-byte IEEE 754)
+            {
+                float number{};
+                return get_number(input_format_t::cbor, number) && sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
+            case 0xFB: // Double-Precision Float (eight-byte IEEE 754)
+            {
+                double number{};
+                return get_number(input_format_t::cbor, number) && sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
+            default: // anything else (0xFF is handled inside the other types)
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::cbor, "invalid byte: 0x" + last_token, "value"), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @brief reads a CBOR string
+
+    This function first reads starting bytes to determine the expected
+    string length and then copies this number of bytes into a string.
+    Additionally, CBOR's strings with indefinite lengths are supported.
+
+    @param[out] result  created string
+
+    @return whether string creation completed
+    */
+    bool get_cbor_string(string_t& result)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::cbor, "string")))
+        {
+            return false;
+        }
+
+        switch (current)
+        {
+            // UTF-8 string (0x00..0x17 bytes follow)
+            case 0x60:
+            case 0x61:
+            case 0x62:
+            case 0x63:
+            case 0x64:
+            case 0x65:
+            case 0x66:
+            case 0x67:
+            case 0x68:
+            case 0x69:
+            case 0x6A:
+            case 0x6B:
+            case 0x6C:
+            case 0x6D:
+            case 0x6E:
+            case 0x6F:
+            case 0x70:
+            case 0x71:
+            case 0x72:
+            case 0x73:
+            case 0x74:
+            case 0x75:
+            case 0x76:
+            case 0x77:
+            {
+                return get_string(input_format_t::cbor, static_cast<unsigned int>(current) & 0x1Fu, result);
+            }
+
+            case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
+            {
+                std::uint8_t len{};
+                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
+            }
+
+            case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
+            }
+
+            case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
+            }
+
+            case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
+            {
+                std::uint64_t len{};
+                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
+            }
+
+            case 0x7F: // UTF-8 string (indefinite length)
+            {
+                while (get() != 0xFF)
+                {
+                    string_t chunk;
+                    if (!get_cbor_string(chunk))
+                    {
+                        return false;
+                    }
+                    result.append(chunk);
+                }
+                return true;
+            }
+
+            default:
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::cbor, "expected length specification (0x60-0x7B) or indefinite string type (0x7F); last byte: 0x" + last_token, "string"), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @brief reads a CBOR byte array
+
+    This function first reads starting bytes to determine the expected
+    byte array length and then copies this number of bytes into the byte array.
+    Additionally, CBOR's byte arrays with indefinite lengths are supported.
+
+    @param[out] result  created byte array
+
+    @return whether byte array creation completed
+    */
+    bool get_cbor_binary(binary_t& result)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::cbor, "binary")))
+        {
+            return false;
+        }
+
+        switch (current)
+        {
+            // Binary data (0x00..0x17 bytes follow)
+            case 0x40:
+            case 0x41:
+            case 0x42:
+            case 0x43:
+            case 0x44:
+            case 0x45:
+            case 0x46:
+            case 0x47:
+            case 0x48:
+            case 0x49:
+            case 0x4A:
+            case 0x4B:
+            case 0x4C:
+            case 0x4D:
+            case 0x4E:
+            case 0x4F:
+            case 0x50:
+            case 0x51:
+            case 0x52:
+            case 0x53:
+            case 0x54:
+            case 0x55:
+            case 0x56:
+            case 0x57:
+            {
+                return get_binary(input_format_t::cbor, static_cast<unsigned int>(current) & 0x1Fu, result);
+            }
+
+            case 0x58: // Binary data (one-byte uint8_t for n follows)
+            {
+                std::uint8_t len{};
+                return get_number(input_format_t::cbor, len) &&
+                       get_binary(input_format_t::cbor, len, result);
+            }
+
+            case 0x59: // Binary data (two-byte uint16_t for n follow)
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::cbor, len) &&
+                       get_binary(input_format_t::cbor, len, result);
+            }
+
+            case 0x5A: // Binary data (four-byte uint32_t for n follow)
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::cbor, len) &&
+                       get_binary(input_format_t::cbor, len, result);
+            }
+
+            case 0x5B: // Binary data (eight-byte uint64_t for n follow)
+            {
+                std::uint64_t len{};
+                return get_number(input_format_t::cbor, len) &&
+                       get_binary(input_format_t::cbor, len, result);
+            }
+
+            case 0x5F: // Binary data (indefinite length)
+            {
+                while (get() != 0xFF)
+                {
+                    binary_t chunk;
+                    if (!get_cbor_binary(chunk))
+                    {
+                        return false;
+                    }
+                    result.insert(result.end(), chunk.begin(), chunk.end());
+                }
+                return true;
+            }
+
+            default:
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::cbor, "expected length specification (0x40-0x5B) or indefinite binary array type (0x5F); last byte: 0x" + last_token, "binary"), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @param[in] len  the length of the array or std::size_t(-1) for an
+                    array of indefinite size
+    @param[in] tag_handler how CBOR tags should be treated
+    @return whether array creation completed
+    */
+    bool get_cbor_array(const std::size_t len,
+                        const cbor_tag_handler_t tag_handler)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!sax->start_array(len)))
+        {
+            return false;
+        }
+
+        if (len != std::size_t(-1))
+        {
+            for (std::size_t i = 0; i < len; ++i)
+            {
+                if (JSON_HEDLEY_UNLIKELY(!parse_cbor_internal(true, tag_handler)))
+                {
+                    return false;
+                }
+            }
+        }
+        else
+        {
+            while (get() != 0xFF)
+            {
+                if (JSON_HEDLEY_UNLIKELY(!parse_cbor_internal(false, tag_handler)))
+                {
+                    return false;
+                }
+            }
+        }
+
+        return sax->end_array();
+    }
+
+    /*!
+    @param[in] len  the length of the object or std::size_t(-1) for an
+                    object of indefinite size
+    @param[in] tag_handler how CBOR tags should be treated
+    @return whether object creation completed
+    */
+    bool get_cbor_object(const std::size_t len,
+                         const cbor_tag_handler_t tag_handler)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!sax->start_object(len)))
+        {
+            return false;
+        }
+
+        if (len != 0)
+        {
+            string_t key;
+            if (len != std::size_t(-1))
+            {
+                for (std::size_t i = 0; i < len; ++i)
+                {
+                    get();
+                    if (JSON_HEDLEY_UNLIKELY(!get_cbor_string(key) || !sax->key(key)))
+                    {
+                        return false;
+                    }
+
+                    if (JSON_HEDLEY_UNLIKELY(!parse_cbor_internal(true, tag_handler)))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
+            }
+            else
+            {
+                while (get() != 0xFF)
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!get_cbor_string(key) || !sax->key(key)))
+                    {
+                        return false;
+                    }
+
+                    if (JSON_HEDLEY_UNLIKELY(!parse_cbor_internal(true, tag_handler)))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
+            }
+        }
+
+        return sax->end_object();
+    }
+
+    /////////////
+    // MsgPack //
+    /////////////
+
+    /*!
+    @return whether a valid MessagePack value was passed to the SAX parser
+    */
+    bool parse_msgpack_internal()
+    {
+        switch (get())
+        {
+            // EOF
+            case std::char_traits<char_type>::eof():
+                return unexpect_eof(input_format_t::msgpack, "value");
+
+            // positive fixint
+            case 0x00:
+            case 0x01:
+            case 0x02:
+            case 0x03:
+            case 0x04:
+            case 0x05:
+            case 0x06:
+            case 0x07:
+            case 0x08:
+            case 0x09:
+            case 0x0A:
+            case 0x0B:
+            case 0x0C:
+            case 0x0D:
+            case 0x0E:
+            case 0x0F:
+            case 0x10:
+            case 0x11:
+            case 0x12:
+            case 0x13:
+            case 0x14:
+            case 0x15:
+            case 0x16:
+            case 0x17:
+            case 0x18:
+            case 0x19:
+            case 0x1A:
+            case 0x1B:
+            case 0x1C:
+            case 0x1D:
+            case 0x1E:
+            case 0x1F:
+            case 0x20:
+            case 0x21:
+            case 0x22:
+            case 0x23:
+            case 0x24:
+            case 0x25:
+            case 0x26:
+            case 0x27:
+            case 0x28:
+            case 0x29:
+            case 0x2A:
+            case 0x2B:
+            case 0x2C:
+            case 0x2D:
+            case 0x2E:
+            case 0x2F:
+            case 0x30:
+            case 0x31:
+            case 0x32:
+            case 0x33:
+            case 0x34:
+            case 0x35:
+            case 0x36:
+            case 0x37:
+            case 0x38:
+            case 0x39:
+            case 0x3A:
+            case 0x3B:
+            case 0x3C:
+            case 0x3D:
+            case 0x3E:
+            case 0x3F:
+            case 0x40:
+            case 0x41:
+            case 0x42:
+            case 0x43:
+            case 0x44:
+            case 0x45:
+            case 0x46:
+            case 0x47:
+            case 0x48:
+            case 0x49:
+            case 0x4A:
+            case 0x4B:
+            case 0x4C:
+            case 0x4D:
+            case 0x4E:
+            case 0x4F:
+            case 0x50:
+            case 0x51:
+            case 0x52:
+            case 0x53:
+            case 0x54:
+            case 0x55:
+            case 0x56:
+            case 0x57:
+            case 0x58:
+            case 0x59:
+            case 0x5A:
+            case 0x5B:
+            case 0x5C:
+            case 0x5D:
+            case 0x5E:
+            case 0x5F:
+            case 0x60:
+            case 0x61:
+            case 0x62:
+            case 0x63:
+            case 0x64:
+            case 0x65:
+            case 0x66:
+            case 0x67:
+            case 0x68:
+            case 0x69:
+            case 0x6A:
+            case 0x6B:
+            case 0x6C:
+            case 0x6D:
+            case 0x6E:
+            case 0x6F:
+            case 0x70:
+            case 0x71:
+            case 0x72:
+            case 0x73:
+            case 0x74:
+            case 0x75:
+            case 0x76:
+            case 0x77:
+            case 0x78:
+            case 0x79:
+            case 0x7A:
+            case 0x7B:
+            case 0x7C:
+            case 0x7D:
+            case 0x7E:
+            case 0x7F:
+                return sax->number_unsigned(static_cast<number_unsigned_t>(current));
+
+            // fixmap
+            case 0x80:
+            case 0x81:
+            case 0x82:
+            case 0x83:
+            case 0x84:
+            case 0x85:
+            case 0x86:
+            case 0x87:
+            case 0x88:
+            case 0x89:
+            case 0x8A:
+            case 0x8B:
+            case 0x8C:
+            case 0x8D:
+            case 0x8E:
+            case 0x8F:
+                return get_msgpack_object(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x0Fu));
+
+            // fixarray
+            case 0x90:
+            case 0x91:
+            case 0x92:
+            case 0x93:
+            case 0x94:
+            case 0x95:
+            case 0x96:
+            case 0x97:
+            case 0x98:
+            case 0x99:
+            case 0x9A:
+            case 0x9B:
+            case 0x9C:
+            case 0x9D:
+            case 0x9E:
+            case 0x9F:
+                return get_msgpack_array(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x0Fu));
+
+            // fixstr
+            case 0xA0:
+            case 0xA1:
+            case 0xA2:
+            case 0xA3:
+            case 0xA4:
+            case 0xA5:
+            case 0xA6:
+            case 0xA7:
+            case 0xA8:
+            case 0xA9:
+            case 0xAA:
+            case 0xAB:
+            case 0xAC:
+            case 0xAD:
+            case 0xAE:
+            case 0xAF:
+            case 0xB0:
+            case 0xB1:
+            case 0xB2:
+            case 0xB3:
+            case 0xB4:
+            case 0xB5:
+            case 0xB6:
+            case 0xB7:
+            case 0xB8:
+            case 0xB9:
+            case 0xBA:
+            case 0xBB:
+            case 0xBC:
+            case 0xBD:
+            case 0xBE:
+            case 0xBF:
+            case 0xD9: // str 8
+            case 0xDA: // str 16
+            case 0xDB: // str 32
+            {
+                string_t s;
+                return get_msgpack_string(s) && sax->string(s);
+            }
+
+            case 0xC0: // nil
+                return sax->null();
+
+            case 0xC2: // false
+                return sax->boolean(false);
+
+            case 0xC3: // true
+                return sax->boolean(true);
+
+            case 0xC4: // bin 8
+            case 0xC5: // bin 16
+            case 0xC6: // bin 32
+            case 0xC7: // ext 8
+            case 0xC8: // ext 16
+            case 0xC9: // ext 32
+            case 0xD4: // fixext 1
+            case 0xD5: // fixext 2
+            case 0xD6: // fixext 4
+            case 0xD7: // fixext 8
+            case 0xD8: // fixext 16
+            {
+                binary_t b;
+                return get_msgpack_binary(b) && sax->binary(b);
+            }
+
+            case 0xCA: // float 32
+            {
+                float number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
+            case 0xCB: // float 64
+            {
+                double number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
+            case 0xCC: // uint 8
+            {
+                std::uint8_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_unsigned(number);
+            }
+
+            case 0xCD: // uint 16
+            {
+                std::uint16_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_unsigned(number);
+            }
+
+            case 0xCE: // uint 32
+            {
+                std::uint32_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_unsigned(number);
+            }
+
+            case 0xCF: // uint 64
+            {
+                std::uint64_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_unsigned(number);
+            }
+
+            case 0xD0: // int 8
+            {
+                std::int8_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_integer(number);
+            }
+
+            case 0xD1: // int 16
+            {
+                std::int16_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_integer(number);
+            }
+
+            case 0xD2: // int 32
+            {
+                std::int32_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_integer(number);
+            }
+
+            case 0xD3: // int 64
+            {
+                std::int64_t number{};
+                return get_number(input_format_t::msgpack, number) && sax->number_integer(number);
+            }
+
+            case 0xDC: // array 16
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::msgpack, len) && get_msgpack_array(static_cast<std::size_t>(len));
+            }
+
+            case 0xDD: // array 32
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::msgpack, len) && get_msgpack_array(static_cast<std::size_t>(len));
+            }
+
+            case 0xDE: // map 16
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::msgpack, len) && get_msgpack_object(static_cast<std::size_t>(len));
+            }
+
+            case 0xDF: // map 32
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::msgpack, len) && get_msgpack_object(static_cast<std::size_t>(len));
+            }
+
+            // negative fixint
+            case 0xE0:
+            case 0xE1:
+            case 0xE2:
+            case 0xE3:
+            case 0xE4:
+            case 0xE5:
+            case 0xE6:
+            case 0xE7:
+            case 0xE8:
+            case 0xE9:
+            case 0xEA:
+            case 0xEB:
+            case 0xEC:
+            case 0xED:
+            case 0xEE:
+            case 0xEF:
+            case 0xF0:
+            case 0xF1:
+            case 0xF2:
+            case 0xF3:
+            case 0xF4:
+            case 0xF5:
+            case 0xF6:
+            case 0xF7:
+            case 0xF8:
+            case 0xF9:
+            case 0xFA:
+            case 0xFB:
+            case 0xFC:
+            case 0xFD:
+            case 0xFE:
+            case 0xFF:
+                return sax->number_integer(static_cast<std::int8_t>(current));
+
+            default: // anything else
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::msgpack, "invalid byte: 0x" + last_token, "value"), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @brief reads a MessagePack string
+
+    This function first reads starting bytes to determine the expected
+    string length and then copies this number of bytes into a string.
+
+    @param[out] result  created string
+
+    @return whether string creation completed
+    */
+    bool get_msgpack_string(string_t& result)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::msgpack, "string")))
+        {
+            return false;
+        }
+
+        switch (current)
+        {
+            // fixstr
+            case 0xA0:
+            case 0xA1:
+            case 0xA2:
+            case 0xA3:
+            case 0xA4:
+            case 0xA5:
+            case 0xA6:
+            case 0xA7:
+            case 0xA8:
+            case 0xA9:
+            case 0xAA:
+            case 0xAB:
+            case 0xAC:
+            case 0xAD:
+            case 0xAE:
+            case 0xAF:
+            case 0xB0:
+            case 0xB1:
+            case 0xB2:
+            case 0xB3:
+            case 0xB4:
+            case 0xB5:
+            case 0xB6:
+            case 0xB7:
+            case 0xB8:
+            case 0xB9:
+            case 0xBA:
+            case 0xBB:
+            case 0xBC:
+            case 0xBD:
+            case 0xBE:
+            case 0xBF:
+            {
+                return get_string(input_format_t::msgpack, static_cast<unsigned int>(current) & 0x1Fu, result);
+            }
+
+            case 0xD9: // str 8
+            {
+                std::uint8_t len{};
+                return get_number(input_format_t::msgpack, len) && get_string(input_format_t::msgpack, len, result);
+            }
+
+            case 0xDA: // str 16
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::msgpack, len) && get_string(input_format_t::msgpack, len, result);
+            }
+
+            case 0xDB: // str 32
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::msgpack, len) && get_string(input_format_t::msgpack, len, result);
+            }
+
+            default:
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::msgpack, "expected length specification (0xA0-0xBF, 0xD9-0xDB); last byte: 0x" + last_token, "string"), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @brief reads a MessagePack byte array
+
+    This function first reads starting bytes to determine the expected
+    byte array length and then copies this number of bytes into a byte array.
+
+    @param[out] result  created byte array
+
+    @return whether byte array creation completed
+    */
+    bool get_msgpack_binary(binary_t& result)
+    {
+        // helper function to set the subtype
+        auto assign_and_return_true = [&result](std::int8_t subtype)
+        {
+            result.set_subtype(static_cast<std::uint8_t>(subtype));
+            return true;
+        };
+
+        switch (current)
+        {
+            case 0xC4: // bin 8
+            {
+                std::uint8_t len{};
+                return get_number(input_format_t::msgpack, len) &&
+                       get_binary(input_format_t::msgpack, len, result);
+            }
+
+            case 0xC5: // bin 16
+            {
+                std::uint16_t len{};
+                return get_number(input_format_t::msgpack, len) &&
+                       get_binary(input_format_t::msgpack, len, result);
+            }
+
+            case 0xC6: // bin 32
+            {
+                std::uint32_t len{};
+                return get_number(input_format_t::msgpack, len) &&
+                       get_binary(input_format_t::msgpack, len, result);
+            }
+
+            case 0xC7: // ext 8
+            {
+                std::uint8_t len{};
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, len) &&
+                       get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, len, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            case 0xC8: // ext 16
+            {
+                std::uint16_t len{};
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, len) &&
+                       get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, len, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            case 0xC9: // ext 32
+            {
+                std::uint32_t len{};
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, len) &&
+                       get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, len, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            case 0xD4: // fixext 1
+            {
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, 1, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            case 0xD5: // fixext 2
+            {
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, 2, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            case 0xD6: // fixext 4
+            {
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, 4, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            case 0xD7: // fixext 8
+            {
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, 8, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            case 0xD8: // fixext 16
+            {
+                std::int8_t subtype{};
+                return get_number(input_format_t::msgpack, subtype) &&
+                       get_binary(input_format_t::msgpack, 16, result) &&
+                       assign_and_return_true(subtype);
+            }
+
+            default:           // LCOV_EXCL_LINE
+                return false;  // LCOV_EXCL_LINE
+        }
+    }
+
+    /*!
+    @param[in] len  the length of the array
+    @return whether array creation completed
+    */
+    bool get_msgpack_array(const std::size_t len)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!sax->start_array(len)))
+        {
+            return false;
+        }
+
+        for (std::size_t i = 0; i < len; ++i)
+        {
+            if (JSON_HEDLEY_UNLIKELY(!parse_msgpack_internal()))
+            {
+                return false;
+            }
+        }
+
+        return sax->end_array();
+    }
+
+    /*!
+    @param[in] len  the length of the object
+    @return whether object creation completed
+    */
+    bool get_msgpack_object(const std::size_t len)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!sax->start_object(len)))
+        {
+            return false;
+        }
+
+        string_t key;
+        for (std::size_t i = 0; i < len; ++i)
+        {
+            get();
+            if (JSON_HEDLEY_UNLIKELY(!get_msgpack_string(key) || !sax->key(key)))
+            {
+                return false;
+            }
+
+            if (JSON_HEDLEY_UNLIKELY(!parse_msgpack_internal()))
+            {
+                return false;
+            }
+            key.clear();
+        }
+
+        return sax->end_object();
+    }
+
+    ////////////
+    // UBJSON //
+    ////////////
+
+    /*!
+    @param[in] get_char  whether a new character should be retrieved from the
+                         input (true, default) or whether the last read
+                         character should be considered instead
+
+    @return whether a valid UBJSON value was passed to the SAX parser
+    */
+    bool parse_ubjson_internal(const bool get_char = true)
+    {
+        return get_ubjson_value(get_char ? get_ignore_noop() : current);
+    }
+
+    /*!
+    @brief reads a UBJSON string
+
+    This function is either called after reading the 'S' byte explicitly
+    indicating a string, or in case of an object key where the 'S' byte can be
+    left out.
+
+    @param[out] result   created string
+    @param[in] get_char  whether a new character should be retrieved from the
+                         input (true, default) or whether the last read
+                         character should be considered instead
+
+    @return whether string creation completed
+    */
+    bool get_ubjson_string(string_t& result, const bool get_char = true)
+    {
+        if (get_char)
+        {
+            get();  // TODO(niels): may we ignore N here?
+        }
+
+        if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::ubjson, "value")))
+        {
+            return false;
+        }
+
+        switch (current)
+        {
+            case 'U':
+            {
+                std::uint8_t len{};
+                return get_number(input_format_t::ubjson, len) && get_string(input_format_t::ubjson, len, result);
+            }
+
+            case 'i':
+            {
+                std::int8_t len{};
+                return get_number(input_format_t::ubjson, len) && get_string(input_format_t::ubjson, len, result);
+            }
+
+            case 'I':
+            {
+                std::int16_t len{};
+                return get_number(input_format_t::ubjson, len) && get_string(input_format_t::ubjson, len, result);
+            }
+
+            case 'l':
+            {
+                std::int32_t len{};
+                return get_number(input_format_t::ubjson, len) && get_string(input_format_t::ubjson, len, result);
+            }
+
+            case 'L':
+            {
+                std::int64_t len{};
+                return get_number(input_format_t::ubjson, len) && get_string(input_format_t::ubjson, len, result);
+            }
+
+            default:
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "expected length type specification (U, i, I, l, L); last byte: 0x" + last_token, "string"), BasicJsonType()));
+        }
+    }
+
+    /*!
+    @param[out] result  determined size
+    @return whether size determination completed
+    */
+    bool get_ubjson_size_value(std::size_t& result)
+    {
+        switch (get_ignore_noop())
+        {
+            case 'U':
+            {
+                std::uint8_t number{};
+                if (JSON_HEDLEY_UNLIKELY(!get_number(input_format_t::ubjson, number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'i':
+            {
+                std::int8_t number{};
+                if (JSON_HEDLEY_UNLIKELY(!get_number(input_format_t::ubjson, number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number); // NOLINT(bugprone-signed-char-misuse,cert-str34-c): number is not a char
+                return true;
+            }
+
+            case 'I':
+            {
+                std::int16_t number{};
+                if (JSON_HEDLEY_UNLIKELY(!get_number(input_format_t::ubjson, number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'l':
+            {
+                std::int32_t number{};
+                if (JSON_HEDLEY_UNLIKELY(!get_number(input_format_t::ubjson, number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'L':
+            {
+                std::int64_t number{};
+                if (JSON_HEDLEY_UNLIKELY(!get_number(input_format_t::ubjson, number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            default:
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "expected length type specification (U, i, I, l, L) after '#'; last byte: 0x" + last_token, "size"), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @brief determine the type and size for a container
+
+    In the optimized UBJSON format, a type and a size can be provided to allow
+    for a more compact representation.
+
+    @param[out] result  pair of the size and the type
+
+    @return whether pair creation completed
+    */
+    bool get_ubjson_size_type(std::pair<std::size_t, char_int_type>& result)
+    {
+        result.first = string_t::npos; // size
+        result.second = 0; // type
+
+        get_ignore_noop();
+
+        if (current == '$')
+        {
+            result.second = get();  // must not ignore 'N', because 'N' maybe the type
+            if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::ubjson, "type")))
+            {
+                return false;
+            }
+
+            get_ignore_noop();
+            if (JSON_HEDLEY_UNLIKELY(current != '#'))
+            {
+                if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::ubjson, "value")))
+                {
+                    return false;
+                }
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::ubjson, "expected '#' after type information; last byte: 0x" + last_token, "size"), BasicJsonType()));
+            }
+
+            return get_ubjson_size_value(result.first);
+        }
+
+        if (current == '#')
+        {
+            return get_ubjson_size_value(result.first);
+        }
+
+        return true;
+    }
+
+    /*!
+    @param prefix  the previously read or set type prefix
+    @return whether value creation completed
+    */
+    bool get_ubjson_value(const char_int_type prefix)
+    {
+        switch (prefix)
+        {
+            case std::char_traits<char_type>::eof():  // EOF
+                return unexpect_eof(input_format_t::ubjson, "value");
+
+            case 'T':  // true
+                return sax->boolean(true);
+            case 'F':  // false
+                return sax->boolean(false);
+
+            case 'Z':  // null
+                return sax->null();
+
+            case 'U':
+            {
+                std::uint8_t number{};
+                return get_number(input_format_t::ubjson, number) && sax->number_unsigned(number);
+            }
+
+            case 'i':
+            {
+                std::int8_t number{};
+                return get_number(input_format_t::ubjson, number) && sax->number_integer(number);
+            }
+
+            case 'I':
+            {
+                std::int16_t number{};
+                return get_number(input_format_t::ubjson, number) && sax->number_integer(number);
+            }
+
+            case 'l':
+            {
+                std::int32_t number{};
+                return get_number(input_format_t::ubjson, number) && sax->number_integer(number);
+            }
+
+            case 'L':
+            {
+                std::int64_t number{};
+                return get_number(input_format_t::ubjson, number) && sax->number_integer(number);
+            }
+
+            case 'd':
+            {
+                float number{};
+                return get_number(input_format_t::ubjson, number) && sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
+            case 'D':
+            {
+                double number{};
+                return get_number(input_format_t::ubjson, number) && sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
+            case 'H':
+            {
+                return get_ubjson_high_precision_number();
+            }
+
+            case 'C':  // char
+            {
+                get();
+                if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::ubjson, "char")))
+                {
+                    return false;
+                }
+                if (JSON_HEDLEY_UNLIKELY(current > 127))
+                {
+                    auto last_token = get_token_string();
+                    return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + last_token, "char"), BasicJsonType()));
+                }
+                string_t s(1, static_cast<typename string_t::value_type>(current));
+                return sax->string(s);
+            }
+
+            case 'S':  // string
+            {
+                string_t s;
+                return get_ubjson_string(s) && sax->string(s);
+            }
+
+            case '[':  // array
+                return get_ubjson_array();
+
+            case '{':  // object
+                return get_ubjson_object();
+
+            default: // anything else
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::ubjson, "invalid byte: 0x" + last_token, "value"), BasicJsonType()));
+            }
+        }
+    }
+
+    /*!
+    @return whether array creation completed
+    */
+    bool get_ubjson_array()
+    {
+        std::pair<std::size_t, char_int_type> size_and_type;
+        if (JSON_HEDLEY_UNLIKELY(!get_ubjson_size_type(size_and_type)))
+        {
+            return false;
+        }
+
+        if (size_and_type.first != string_t::npos)
+        {
+            if (JSON_HEDLEY_UNLIKELY(!sax->start_array(size_and_type.first)))
+            {
+                return false;
+            }
+
+            if (size_and_type.second != 0)
+            {
+                if (size_and_type.second != 'N')
+                {
+                    for (std::size_t i = 0; i < size_and_type.first; ++i)
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!get_ubjson_value(size_and_type.second)))
+                        {
+                            return false;
+                        }
+                    }
+                }
+            }
+            else
+            {
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!parse_ubjson_internal()))
+                    {
+                        return false;
+                    }
+                }
+            }
+        }
+        else
+        {
+            if (JSON_HEDLEY_UNLIKELY(!sax->start_array(std::size_t(-1))))
+            {
+                return false;
+            }
+
+            while (current != ']')
+            {
+                if (JSON_HEDLEY_UNLIKELY(!parse_ubjson_internal(false)))
+                {
+                    return false;
+                }
+                get_ignore_noop();
+            }
+        }
+
+        return sax->end_array();
+    }
+
+    /*!
+    @return whether object creation completed
+    */
+    bool get_ubjson_object()
+    {
+        std::pair<std::size_t, char_int_type> size_and_type;
+        if (JSON_HEDLEY_UNLIKELY(!get_ubjson_size_type(size_and_type)))
+        {
+            return false;
+        }
+
+        string_t key;
+        if (size_and_type.first != string_t::npos)
+        {
+            if (JSON_HEDLEY_UNLIKELY(!sax->start_object(size_and_type.first)))
+            {
+                return false;
+            }
+
+            if (size_and_type.second != 0)
+            {
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!get_ubjson_string(key) || !sax->key(key)))
+                    {
+                        return false;
+                    }
+                    if (JSON_HEDLEY_UNLIKELY(!get_ubjson_value(size_and_type.second)))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
+            }
+            else
+            {
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!get_ubjson_string(key) || !sax->key(key)))
+                    {
+                        return false;
+                    }
+                    if (JSON_HEDLEY_UNLIKELY(!parse_ubjson_internal()))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
+            }
+        }
+        else
+        {
+            if (JSON_HEDLEY_UNLIKELY(!sax->start_object(std::size_t(-1))))
+            {
+                return false;
+            }
+
+            while (current != '}')
+            {
+                if (JSON_HEDLEY_UNLIKELY(!get_ubjson_string(key, false) || !sax->key(key)))
+                {
+                    return false;
+                }
+                if (JSON_HEDLEY_UNLIKELY(!parse_ubjson_internal()))
+                {
+                    return false;
+                }
+                get_ignore_noop();
+                key.clear();
+            }
+        }
+
+        return sax->end_object();
+    }
+
+    // Note, no reader for UBJSON binary types is implemented because they do
+    // not exist
+
+    bool get_ubjson_high_precision_number()
+    {
+        // get size of following number string
+        std::size_t size{};
+        auto res = get_ubjson_size_value(size);
+        if (JSON_HEDLEY_UNLIKELY(!res))
+        {
+            return res;
+        }
+
+        // get number string
+        std::vector<char> number_vector;
+        for (std::size_t i = 0; i < size; ++i)
+        {
+            get();
+            if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::ubjson, "number")))
+            {
+                return false;
+            }
+            number_vector.push_back(static_cast<char>(current));
+        }
+
+        // parse number string
+        using ia_type = decltype(detail::input_adapter(number_vector));
+        auto number_lexer = detail::lexer<BasicJsonType, ia_type>(detail::input_adapter(number_vector), false);
+        const auto result_number = number_lexer.scan();
+        const auto number_string = number_lexer.get_token_string();
+        const auto result_remainder = number_lexer.scan();
+
+        using token_type = typename detail::lexer_base<BasicJsonType>::token_type;
+
+        if (JSON_HEDLEY_UNLIKELY(result_remainder != token_type::end_of_input))
+        {
+            return sax->parse_error(chars_read, number_string, parse_error::create(115, chars_read, exception_message(input_format_t::ubjson, "invalid number text: " + number_lexer.get_token_string(), "high-precision number"), BasicJsonType()));
+        }
+
+        switch (result_number)
+        {
+            case token_type::value_integer:
+                return sax->number_integer(number_lexer.get_number_integer());
+            case token_type::value_unsigned:
+                return sax->number_unsigned(number_lexer.get_number_unsigned());
+            case token_type::value_float:
+                return sax->number_float(number_lexer.get_number_float(), std::move(number_string));
+            case token_type::uninitialized:
+            case token_type::literal_true:
+            case token_type::literal_false:
+            case token_type::literal_null:
+            case token_type::value_string:
+            case token_type::begin_array:
+            case token_type::begin_object:
+            case token_type::end_array:
+            case token_type::end_object:
+            case token_type::name_separator:
+            case token_type::value_separator:
+            case token_type::parse_error:
+            case token_type::end_of_input:
+            case token_type::literal_or_value:
+            default:
+                return sax->parse_error(chars_read, number_string, parse_error::create(115, chars_read, exception_message(input_format_t::ubjson, "invalid number text: " + number_lexer.get_token_string(), "high-precision number"), BasicJsonType()));
+        }
+    }
+
+    ///////////////////////
+    // Utility functions //
+    ///////////////////////
+
+    /*!
+    @brief get next character from the input
+
+    This function provides the interface to the used input adapter. It does
+    not throw in case the input reached EOF, but returns a -'ve valued
+    `std::char_traits<char_type>::eof()` in that case.
+
+    @return character read from the input
+    */
+    char_int_type get()
+    {
+        ++chars_read;
+        return current = ia.get_character();
+    }
+
+    /*!
+    @return character read from the input after ignoring all 'N' entries
+    */
+    char_int_type get_ignore_noop()
+    {
+        do
+        {
+            get();
+        }
+        while (current == 'N');
+
+        return current;
+    }
+
+    /*
+    @brief read a number from the input
+
+    @tparam NumberType the type of the number
+    @param[in] format   the current format (for diagnostics)
+    @param[out] result  number of type @a NumberType
+
+    @return whether conversion completed
+
+    @note This function needs to respect the system's endianess, because
+          bytes in CBOR, MessagePack, and UBJSON are stored in network order
+          (big endian) and therefore need reordering on little endian systems.
+    */
+    template<typename NumberType, bool InputIsLittleEndian = false>
+    bool get_number(const input_format_t format, NumberType& result)
+    {
+        // step 1: read input into array with system's byte order
+        std::array<std::uint8_t, sizeof(NumberType)> vec{};
+        for (std::size_t i = 0; i < sizeof(NumberType); ++i)
+        {
+            get();
+            if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(format, "number")))
+            {
+                return false;
+            }
+
+            // reverse byte order prior to conversion if necessary
+            if (is_little_endian != InputIsLittleEndian)
+            {
+                vec[sizeof(NumberType) - i - 1] = static_cast<std::uint8_t>(current);
+            }
+            else
+            {
+                vec[i] = static_cast<std::uint8_t>(current); // LCOV_EXCL_LINE
+            }
+        }
+
+        // step 2: convert array into number of type T and return
+        std::memcpy(&result, vec.data(), sizeof(NumberType));
+        return true;
+    }
+
+    /*!
+    @brief create a string by reading characters from the input
+
+    @tparam NumberType the type of the number
+    @param[in] format the current format (for diagnostics)
+    @param[in] len number of characters to read
+    @param[out] result string created by reading @a len bytes
+
+    @return whether string creation completed
+
+    @note We can not reserve @a len bytes for the result, because @a len
+          may be too large. Usually, @ref unexpect_eof() detects the end of
+          the input before we run out of string memory.
+    */
+    template<typename NumberType>
+    bool get_string(const input_format_t format,
+                    const NumberType len,
+                    string_t& result)
+    {
+        bool success = true;
+        for (NumberType i = 0; i < len; i++)
+        {
+            get();
+            if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(format, "string")))
+            {
+                success = false;
+                break;
+            }
+            result.push_back(static_cast<typename string_t::value_type>(current));
+        }
+        return success;
+    }
+
+    /*!
+    @brief create a byte array by reading bytes from the input
+
+    @tparam NumberType the type of the number
+    @param[in] format the current format (for diagnostics)
+    @param[in] len number of bytes to read
+    @param[out] result byte array created by reading @a len bytes
+
+    @return whether byte array creation completed
+
+    @note We can not reserve @a len bytes for the result, because @a len
+          may be too large. Usually, @ref unexpect_eof() detects the end of
+          the input before we run out of memory.
+    */
+    template<typename NumberType>
+    bool get_binary(const input_format_t format,
+                    const NumberType len,
+                    binary_t& result)
+    {
+        bool success = true;
+        for (NumberType i = 0; i < len; i++)
+        {
+            get();
+            if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(format, "binary")))
+            {
+                success = false;
+                break;
+            }
+            result.push_back(static_cast<std::uint8_t>(current));
+        }
+        return success;
+    }
+
+    /*!
+    @param[in] format   the current format (for diagnostics)
+    @param[in] context  further context information (for diagnostics)
+    @return whether the last read character is not EOF
+    */
+    JSON_HEDLEY_NON_NULL(3)
+    bool unexpect_eof(const input_format_t format, const char* context) const
+    {
+        if (JSON_HEDLEY_UNLIKELY(current == std::char_traits<char_type>::eof()))
+        {
+            return sax->parse_error(chars_read, "<end of file>",
+                                    parse_error::create(110, chars_read, exception_message(format, "unexpected end of input", context), BasicJsonType()));
+        }
+        return true;
+    }
+
+    /*!
+    @return a string representation of the last read byte
+    */
+    std::string get_token_string() const
+    {
+        std::array<char, 3> cr{{}};
+        (std::snprintf)(cr.data(), cr.size(), "%.2hhX", static_cast<unsigned char>(current)); // NOLINT(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+        return std::string{cr.data()};
+    }
+
+    /*!
+    @param[in] format   the current format
+    @param[in] detail   a detailed error message
+    @param[in] context  further context information
+    @return a message string to use in the parse_error exceptions
+    */
+    std::string exception_message(const input_format_t format,
+                                  const std::string& detail,
+                                  const std::string& context) const
+    {
+        std::string error_msg = "syntax error while parsing ";
+
+        switch (format)
+        {
+            case input_format_t::cbor:
+                error_msg += "CBOR";
+                break;
+
+            case input_format_t::msgpack:
+                error_msg += "MessagePack";
+                break;
+
+            case input_format_t::ubjson:
+                error_msg += "UBJSON";
+                break;
+
+            case input_format_t::bson:
+                error_msg += "BSON";
+                break;
+
+            case input_format_t::json: // LCOV_EXCL_LINE
+            default:            // LCOV_EXCL_LINE
+                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+        }
+
+        return error_msg + " " + context + ": " + detail;
+    }
+
+  private:
+    /// input adapter
+    InputAdapterType ia;
+
+    /// the current character
+    char_int_type current = std::char_traits<char_type>::eof();
+
+    /// the number of characters read
+    std::size_t chars_read = 0;
+
+    /// whether we can assume little endianess
+    const bool is_little_endian = little_endianess();
+
+    /// the SAX parser
+    json_sax_t* sax = nullptr;
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/input/input_adapters.hpp>
+
+// #include <nlohmann/detail/input/lexer.hpp>
+
+// #include <nlohmann/detail/input/parser.hpp>
+
+
+#include <cmath> // isfinite
+#include <cstdint> // uint8_t
+#include <functional> // function
+#include <string> // string
+#include <utility> // move
+#include <vector> // vector
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/input/input_adapters.hpp>
+
+// #include <nlohmann/detail/input/json_sax.hpp>
+
+// #include <nlohmann/detail/input/lexer.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/meta/is_sax.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+////////////
+// parser //
+////////////
+
+enum class parse_event_t : std::uint8_t
+{
+    /// the parser read `{` and started to process a JSON object
+    object_start,
+    /// the parser read `}` and finished processing a JSON object
+    object_end,
+    /// the parser read `[` and started to process a JSON array
+    array_start,
+    /// the parser read `]` and finished processing a JSON array
+    array_end,
+    /// the parser read a key of a value in an object
+    key,
+    /// the parser finished reading a JSON value
+    value
+};
+
+template<typename BasicJsonType>
+using parser_callback_t =
+    std::function<bool(int /*depth*/, parse_event_t /*event*/, BasicJsonType& /*parsed*/)>;
+
+/*!
+@brief syntax analysis
+
+This class implements a recursive descent parser.
+*/
+template<typename BasicJsonType, typename InputAdapterType>
+class parser
+{
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using lexer_t = lexer<BasicJsonType, InputAdapterType>;
+    using token_type = typename lexer_t::token_type;
+
+  public:
+    /// a parser reading from an input adapter
+    explicit parser(InputAdapterType&& adapter,
+                    const parser_callback_t<BasicJsonType> cb = nullptr,
+                    const bool allow_exceptions_ = true,
+                    const bool skip_comments = false)
+        : callback(cb)
+        , m_lexer(std::move(adapter), skip_comments)
+        , allow_exceptions(allow_exceptions_)
+    {
+        // read first token
+        get_token();
+    }
+
+    /*!
+    @brief public parser interface
+
+    @param[in] strict      whether to expect the last token to be EOF
+    @param[in,out] result  parsed JSON value
+
+    @throw parse_error.101 in case of an unexpected token
+    @throw parse_error.102 if to_unicode fails or surrogate error
+    @throw parse_error.103 if to_unicode fails
+    */
+    void parse(const bool strict, BasicJsonType& result)
+    {
+        if (callback)
+        {
+            json_sax_dom_callback_parser<BasicJsonType> sdp(result, callback, allow_exceptions);
+            sax_parse_internal(&sdp);
+
+            // in strict mode, input must be completely read
+            if (strict && (get_token() != token_type::end_of_input))
+            {
+                sdp.parse_error(m_lexer.get_position(),
+                                m_lexer.get_token_string(),
+                                parse_error::create(101, m_lexer.get_position(),
+                                                    exception_message(token_type::end_of_input, "value"), BasicJsonType()));
+            }
+
+            // in case of an error, return discarded value
+            if (sdp.is_errored())
+            {
+                result = value_t::discarded;
+                return;
+            }
+
+            // set top-level value to null if it was discarded by the callback
+            // function
+            if (result.is_discarded())
+            {
+                result = nullptr;
+            }
+        }
+        else
+        {
+            json_sax_dom_parser<BasicJsonType> sdp(result, allow_exceptions);
+            sax_parse_internal(&sdp);
+
+            // in strict mode, input must be completely read
+            if (strict && (get_token() != token_type::end_of_input))
+            {
+                sdp.parse_error(m_lexer.get_position(),
+                                m_lexer.get_token_string(),
+                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input, "value"), BasicJsonType()));
+            }
+
+            // in case of an error, return discarded value
+            if (sdp.is_errored())
+            {
+                result = value_t::discarded;
+                return;
+            }
+        }
+
+        result.assert_invariant();
+    }
+
+    /*!
+    @brief public accept interface
+
+    @param[in] strict  whether to expect the last token to be EOF
+    @return whether the input is a proper JSON text
+    */
+    bool accept(const bool strict = true)
+    {
+        json_sax_acceptor<BasicJsonType> sax_acceptor;
+        return sax_parse(&sax_acceptor, strict);
+    }
+
+    template<typename SAX>
+    JSON_HEDLEY_NON_NULL(2)
+    bool sax_parse(SAX* sax, const bool strict = true)
+    {
+        (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
+        const bool result = sax_parse_internal(sax);
+
+        // strict mode: next byte must be EOF
+        if (result && strict && (get_token() != token_type::end_of_input))
+        {
+            return sax->parse_error(m_lexer.get_position(),
+                                    m_lexer.get_token_string(),
+                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input, "value"), BasicJsonType()));
+        }
+
+        return result;
+    }
+
+  private:
+    template<typename SAX>
+    JSON_HEDLEY_NON_NULL(2)
+    bool sax_parse_internal(SAX* sax)
+    {
+        // stack to remember the hierarchy of structured values we are parsing
+        // true = array; false = object
+        std::vector<bool> states;
+        // value to avoid a goto (see comment where set to true)
+        bool skip_to_state_evaluation = false;
+
+        while (true)
+        {
+            if (!skip_to_state_evaluation)
+            {
+                // invariant: get_token() was called before each iteration
+                switch (last_token)
+                {
+                    case token_type::begin_object:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->start_object(std::size_t(-1))))
+                        {
+                            return false;
+                        }
+
+                        // closing } -> we are done
+                        if (get_token() == token_type::end_object)
+                        {
+                            if (JSON_HEDLEY_UNLIKELY(!sax->end_object()))
+                            {
+                                return false;
+                            }
+                            break;
+                        }
+
+                        // parse key
+                        if (JSON_HEDLEY_UNLIKELY(last_token != token_type::value_string))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::value_string, "object key"), BasicJsonType()));
+                        }
+                        if (JSON_HEDLEY_UNLIKELY(!sax->key(m_lexer.get_string())))
+                        {
+                            return false;
+                        }
+
+                        // parse separator (:)
+                        if (JSON_HEDLEY_UNLIKELY(get_token() != token_type::name_separator))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::name_separator, "object separator"), BasicJsonType()));
+                        }
+
+                        // remember we are now inside an object
+                        states.push_back(false);
+
+                        // parse values
+                        get_token();
+                        continue;
+                    }
+
+                    case token_type::begin_array:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->start_array(std::size_t(-1))))
+                        {
+                            return false;
+                        }
+
+                        // closing ] -> we are done
+                        if (get_token() == token_type::end_array)
+                        {
+                            if (JSON_HEDLEY_UNLIKELY(!sax->end_array()))
+                            {
+                                return false;
+                            }
+                            break;
+                        }
+
+                        // remember we are now inside an array
+                        states.push_back(true);
+
+                        // parse values (no need to call get_token)
+                        continue;
+                    }
+
+                    case token_type::value_float:
+                    {
+                        const auto res = m_lexer.get_number_float();
+
+                        if (JSON_HEDLEY_UNLIKELY(!std::isfinite(res)))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    out_of_range::create(406, "number overflow parsing '" + m_lexer.get_token_string() + "'", BasicJsonType()));
+                        }
+
+                        if (JSON_HEDLEY_UNLIKELY(!sax->number_float(res, m_lexer.get_string())))
+                        {
+                            return false;
+                        }
+
+                        break;
+                    }
+
+                    case token_type::literal_false:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->boolean(false)))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::literal_null:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->null()))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::literal_true:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->boolean(true)))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::value_integer:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->number_integer(m_lexer.get_number_integer())))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::value_string:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->string(m_lexer.get_string())))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::value_unsigned:
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!sax->number_unsigned(m_lexer.get_number_unsigned())))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::parse_error:
+                    {
+                        // using "uninitialized" to avoid "expected" message
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::uninitialized, "value"), BasicJsonType()));
+                    }
+
+                    case token_type::uninitialized:
+                    case token_type::end_array:
+                    case token_type::end_object:
+                    case token_type::name_separator:
+                    case token_type::value_separator:
+                    case token_type::end_of_input:
+                    case token_type::literal_or_value:
+                    default: // the last token was unexpected
+                    {
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::literal_or_value, "value"), BasicJsonType()));
+                    }
+                }
+            }
+            else
+            {
+                skip_to_state_evaluation = false;
+            }
+
+            // we reached this line after we successfully parsed a value
+            if (states.empty())
+            {
+                // empty stack: we reached the end of the hierarchy: done
+                return true;
+            }
+
+            if (states.back())  // array
+            {
+                // comma -> next value
+                if (get_token() == token_type::value_separator)
+                {
+                    // parse a new value
+                    get_token();
+                    continue;
+                }
+
+                // closing ]
+                if (JSON_HEDLEY_LIKELY(last_token == token_type::end_array))
+                {
+                    if (JSON_HEDLEY_UNLIKELY(!sax->end_array()))
+                    {
+                        return false;
+                    }
+
+                    // We are done with this array. Before we can parse a
+                    // new value, we need to evaluate the new state first.
+                    // By setting skip_to_state_evaluation to false, we
+                    // are effectively jumping to the beginning of this if.
+                    JSON_ASSERT(!states.empty());
+                    states.pop_back();
+                    skip_to_state_evaluation = true;
+                    continue;
+                }
+
+                return sax->parse_error(m_lexer.get_position(),
+                                        m_lexer.get_token_string(),
+                                        parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_array, "array"), BasicJsonType()));
+            }
+
+            // states.back() is false -> object
+
+            // comma -> next value
+            if (get_token() == token_type::value_separator)
+            {
+                // parse key
+                if (JSON_HEDLEY_UNLIKELY(get_token() != token_type::value_string))
+                {
+                    return sax->parse_error(m_lexer.get_position(),
+                                            m_lexer.get_token_string(),
+                                            parse_error::create(101, m_lexer.get_position(), exception_message(token_type::value_string, "object key"), BasicJsonType()));
+                }
+
+                if (JSON_HEDLEY_UNLIKELY(!sax->key(m_lexer.get_string())))
+                {
+                    return false;
+                }
+
+                // parse separator (:)
+                if (JSON_HEDLEY_UNLIKELY(get_token() != token_type::name_separator))
+                {
+                    return sax->parse_error(m_lexer.get_position(),
+                                            m_lexer.get_token_string(),
+                                            parse_error::create(101, m_lexer.get_position(), exception_message(token_type::name_separator, "object separator"), BasicJsonType()));
+                }
+
+                // parse values
+                get_token();
+                continue;
+            }
+
+            // closing }
+            if (JSON_HEDLEY_LIKELY(last_token == token_type::end_object))
+            {
+                if (JSON_HEDLEY_UNLIKELY(!sax->end_object()))
+                {
+                    return false;
+                }
+
+                // We are done with this object. Before we can parse a
+                // new value, we need to evaluate the new state first.
+                // By setting skip_to_state_evaluation to false, we
+                // are effectively jumping to the beginning of this if.
+                JSON_ASSERT(!states.empty());
+                states.pop_back();
+                skip_to_state_evaluation = true;
+                continue;
+            }
+
+            return sax->parse_error(m_lexer.get_position(),
+                                    m_lexer.get_token_string(),
+                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_object, "object"), BasicJsonType()));
+        }
+    }
+
+    /// get next token from lexer
+    token_type get_token()
+    {
+        return last_token = m_lexer.scan();
+    }
+
+    std::string exception_message(const token_type expected, const std::string& context)
+    {
+        std::string error_msg = "syntax error ";
+
+        if (!context.empty())
+        {
+            error_msg += "while parsing " + context + " ";
+        }
+
+        error_msg += "- ";
+
+        if (last_token == token_type::parse_error)
+        {
+            error_msg += std::string(m_lexer.get_error_message()) + "; last read: '" +
+                         m_lexer.get_token_string() + "'";
+        }
+        else
+        {
+            error_msg += "unexpected " + std::string(lexer_t::token_type_name(last_token));
+        }
+
+        if (expected != token_type::uninitialized)
+        {
+            error_msg += "; expected " + std::string(lexer_t::token_type_name(expected));
+        }
+
+        return error_msg;
+    }
+
+  private:
+    /// callback function
+    const parser_callback_t<BasicJsonType> callback = nullptr;
+    /// the type of the last read token
+    token_type last_token = token_type::uninitialized;
+    /// the lexer
+    lexer_t m_lexer;
+    /// whether to throw exceptions in case of errors
+    const bool allow_exceptions = true;
+};
+
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/iterators/internal_iterator.hpp>
+
+
+// #include <nlohmann/detail/iterators/primitive_iterator.hpp>
+
+
+#include <cstddef> // ptrdiff_t
+#include <limits>  // numeric_limits
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+/*
+@brief an iterator for primitive JSON types
+
+This class models an iterator for primitive JSON types (boolean, number,
+string). It's only purpose is to allow the iterator/const_iterator classes
+to "iterate" over primitive values. Internally, the iterator is modeled by
+a `difference_type` variable. Value begin_value (`0`) models the begin,
+end_value (`1`) models past the end.
+*/
+class primitive_iterator_t
+{
+  private:
+    using difference_type = std::ptrdiff_t;
+    static constexpr difference_type begin_value = 0;
+    static constexpr difference_type end_value = begin_value + 1;
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    /// iterator as signed integer type
+    difference_type m_it = (std::numeric_limits<std::ptrdiff_t>::min)();
+
+  public:
+    constexpr difference_type get_value() const noexcept
+    {
+        return m_it;
+    }
+
+    /// set iterator to a defined beginning
+    void set_begin() noexcept
+    {
+        m_it = begin_value;
+    }
+
+    /// set iterator to a defined past the end
+    void set_end() noexcept
+    {
+        m_it = end_value;
+    }
+
+    /// return whether the iterator can be dereferenced
+    constexpr bool is_begin() const noexcept
+    {
+        return m_it == begin_value;
+    }
+
+    /// return whether the iterator is at end
+    constexpr bool is_end() const noexcept
+    {
+        return m_it == end_value;
+    }
+
+    friend constexpr bool operator==(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
+    {
+        return lhs.m_it == rhs.m_it;
+    }
+
+    friend constexpr bool operator<(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
+    {
+        return lhs.m_it < rhs.m_it;
+    }
+
+    primitive_iterator_t operator+(difference_type n) noexcept
+    {
+        auto result = *this;
+        result += n;
+        return result;
+    }
+
+    friend constexpr difference_type operator-(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
+    {
+        return lhs.m_it - rhs.m_it;
+    }
+
+    primitive_iterator_t& operator++() noexcept
+    {
+        ++m_it;
+        return *this;
+    }
+
+    primitive_iterator_t const operator++(int) noexcept // NOLINT(readability-const-return-type)
+    {
+        auto result = *this;
+        ++m_it;
+        return result;
+    }
+
+    primitive_iterator_t& operator--() noexcept
+    {
+        --m_it;
+        return *this;
+    }
+
+    primitive_iterator_t const operator--(int) noexcept // NOLINT(readability-const-return-type)
+    {
+        auto result = *this;
+        --m_it;
+        return result;
+    }
+
+    primitive_iterator_t& operator+=(difference_type n) noexcept
+    {
+        m_it += n;
+        return *this;
+    }
+
+    primitive_iterator_t& operator-=(difference_type n) noexcept
+    {
+        m_it -= n;
+        return *this;
+    }
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+
+namespace nlohmann
+{
+namespace detail
+{
+/*!
+@brief an iterator value
+
+@note This structure could easily be a union, but MSVC currently does not allow
+unions members with complex constructors, see https://github.com/nlohmann/json/pull/105.
+*/
+template<typename BasicJsonType> struct internal_iterator
+{
+    /// iterator for JSON objects
+    typename BasicJsonType::object_t::iterator object_iterator {};
+    /// iterator for JSON arrays
+    typename BasicJsonType::array_t::iterator array_iterator {};
+    /// generic iterator for all other types
+    primitive_iterator_t primitive_iterator {};
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/iterators/iter_impl.hpp>
+
+
+#include <iterator> // iterator, random_access_iterator_tag, bidirectional_iterator_tag, advance, next
+#include <type_traits> // conditional, is_const, remove_const
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/iterators/internal_iterator.hpp>
+
+// #include <nlohmann/detail/iterators/primitive_iterator.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+// forward declare, to be able to friend it later on
+template<typename IteratorType> class iteration_proxy;
+template<typename IteratorType> class iteration_proxy_value;
+
+/*!
+@brief a template for a bidirectional iterator for the @ref basic_json class
+This class implements a both iterators (iterator and const_iterator) for the
+@ref basic_json class.
+@note An iterator is called *initialized* when a pointer to a JSON value has
+      been set (e.g., by a constructor or a copy assignment). If the iterator is
+      default-constructed, it is *uninitialized* and most methods are undefined.
+      **The library uses assertions to detect calls on uninitialized iterators.**
+@requirement The class satisfies the following concept requirements:
+-
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
+  The iterator that can be moved can be moved in both directions (i.e.
+  incremented and decremented).
+@since version 1.0.0, simplified in version 2.0.9, change to bidirectional
+       iterators in version 3.0.0 (see https://github.com/nlohmann/json/issues/593)
+*/
+template<typename BasicJsonType>
+class iter_impl
+{
+    /// the iterator with BasicJsonType of different const-ness
+    using other_iter_impl = iter_impl<typename std::conditional<std::is_const<BasicJsonType>::value, typename std::remove_const<BasicJsonType>::type, const BasicJsonType>::type>;
+    /// allow basic_json to access private members
+    friend other_iter_impl;
+    friend BasicJsonType;
+    friend iteration_proxy<iter_impl>;
+    friend iteration_proxy_value<iter_impl>;
+
+    using object_t = typename BasicJsonType::object_t;
+    using array_t = typename BasicJsonType::array_t;
+    // make sure BasicJsonType is basic_json or const basic_json
+    static_assert(is_basic_json<typename std::remove_const<BasicJsonType>::type>::value,
+                  "iter_impl only accepts (const) basic_json");
+
+  public:
+
+    /// The std::iterator class template (used as a base class to provide typedefs) is deprecated in C++17.
+    /// The C++ Standard has never required user-defined iterators to derive from std::iterator.
+    /// A user-defined iterator should provide publicly accessible typedefs named
+    /// iterator_category, value_type, difference_type, pointer, and reference.
+    /// Note that value_type is required to be non-const, even for constant iterators.
+    using iterator_category = std::bidirectional_iterator_tag;
+
+    /// the type of the values when the iterator is dereferenced
+    using value_type = typename BasicJsonType::value_type;
+    /// a type to represent differences between iterators
+    using difference_type = typename BasicJsonType::difference_type;
+    /// defines a pointer to the type iterated over (value_type)
+    using pointer = typename std::conditional<std::is_const<BasicJsonType>::value,
+          typename BasicJsonType::const_pointer,
+          typename BasicJsonType::pointer>::type;
+    /// defines a reference to the type iterated over (value_type)
+    using reference =
+        typename std::conditional<std::is_const<BasicJsonType>::value,
+        typename BasicJsonType::const_reference,
+        typename BasicJsonType::reference>::type;
+
+    iter_impl() = default;
+    ~iter_impl() = default;
+    iter_impl(iter_impl&&) noexcept = default;
+    iter_impl& operator=(iter_impl&&) noexcept = default;
+
+    /*!
+    @brief constructor for a given JSON instance
+    @param[in] object  pointer to a JSON object for this iterator
+    @pre object != nullptr
+    @post The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    explicit iter_impl(pointer object) noexcept : m_object(object)
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+            {
+                m_it.object_iterator = typename object_t::iterator();
+                break;
+            }
+
+            case value_t::array:
+            {
+                m_it.array_iterator = typename array_t::iterator();
+                break;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                m_it.primitive_iterator = primitive_iterator_t();
+                break;
+            }
+        }
+    }
+
+    /*!
+    @note The conventional copy constructor and copy assignment are implicitly
+          defined. Combined with the following converting constructor and
+          assignment, they support: (1) copy from iterator to iterator, (2)
+          copy from const iterator to const iterator, and (3) conversion from
+          iterator to const iterator. However conversion from const iterator
+          to iterator is not defined.
+    */
+
+    /*!
+    @brief const copy constructor
+    @param[in] other const iterator to copy from
+    @note This copy constructor had to be defined explicitly to circumvent a bug
+          occurring on msvc v19.0 compiler (VS 2015) debug build. For more
+          information refer to: https://github.com/nlohmann/json/issues/1608
+    */
+    iter_impl(const iter_impl<const BasicJsonType>& other) noexcept
+        : m_object(other.m_object), m_it(other.m_it)
+    {}
+
+    /*!
+    @brief converting assignment
+    @param[in] other const iterator to copy from
+    @return const/non-const iterator
+    @note It is not checked whether @a other is initialized.
+    */
+    iter_impl& operator=(const iter_impl<const BasicJsonType>& other) noexcept
+    {
+        if (&other != this)
+        {
+            m_object = other.m_object;
+            m_it = other.m_it;
+        }
+        return *this;
+    }
+
+    /*!
+    @brief converting constructor
+    @param[in] other  non-const iterator to copy from
+    @note It is not checked whether @a other is initialized.
+    */
+    iter_impl(const iter_impl<typename std::remove_const<BasicJsonType>::type>& other) noexcept
+        : m_object(other.m_object), m_it(other.m_it)
+    {}
+
+    /*!
+    @brief converting assignment
+    @param[in] other  non-const iterator to copy from
+    @return const/non-const iterator
+    @note It is not checked whether @a other is initialized.
+    */
+    iter_impl& operator=(const iter_impl<typename std::remove_const<BasicJsonType>::type>& other) noexcept // NOLINT(cert-oop54-cpp)
+    {
+        m_object = other.m_object;
+        m_it = other.m_it;
+        return *this;
+    }
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    /*!
+    @brief set the iterator to the first value
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    void set_begin() noexcept
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+            {
+                m_it.object_iterator = m_object->m_value.object->begin();
+                break;
+            }
+
+            case value_t::array:
+            {
+                m_it.array_iterator = m_object->m_value.array->begin();
+                break;
+            }
+
+            case value_t::null:
+            {
+                // set to end so begin()==end() is true: null is empty
+                m_it.primitive_iterator.set_end();
+                break;
+            }
+
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                m_it.primitive_iterator.set_begin();
+                break;
+            }
+        }
+    }
+
+    /*!
+    @brief set the iterator past the last value
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    void set_end() noexcept
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+            {
+                m_it.object_iterator = m_object->m_value.object->end();
+                break;
+            }
+
+            case value_t::array:
+            {
+                m_it.array_iterator = m_object->m_value.array->end();
+                break;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                m_it.primitive_iterator.set_end();
+                break;
+            }
+        }
+    }
+
+  public:
+    /*!
+    @brief return a reference to the value pointed to by the iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    reference operator*() const
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+            {
+                JSON_ASSERT(m_it.object_iterator != m_object->m_value.object->end());
+                return m_it.object_iterator->second;
+            }
+
+            case value_t::array:
+            {
+                JSON_ASSERT(m_it.array_iterator != m_object->m_value.array->end());
+                return *m_it.array_iterator;
+            }
+
+            case value_t::null:
+                JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
+
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.is_begin()))
+                {
+                    return *m_object;
+                }
+
+                JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
+            }
+        }
+    }
+
+    /*!
+    @brief dereference the iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    pointer operator->() const
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+            {
+                JSON_ASSERT(m_it.object_iterator != m_object->m_value.object->end());
+                return &(m_it.object_iterator->second);
+            }
+
+            case value_t::array:
+            {
+                JSON_ASSERT(m_it.array_iterator != m_object->m_value.array->end());
+                return &*m_it.array_iterator;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.is_begin()))
+                {
+                    return m_object;
+                }
+
+                JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
+            }
+        }
+    }
+
+    /*!
+    @brief post-increment (it++)
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl const operator++(int) // NOLINT(readability-const-return-type)
+    {
+        auto result = *this;
+        ++(*this);
+        return result;
+    }
+
+    /*!
+    @brief pre-increment (++it)
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl& operator++()
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+            {
+                std::advance(m_it.object_iterator, 1);
+                break;
+            }
+
+            case value_t::array:
+            {
+                std::advance(m_it.array_iterator, 1);
+                break;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                ++m_it.primitive_iterator;
+                break;
+            }
+        }
+
+        return *this;
+    }
+
+    /*!
+    @brief post-decrement (it--)
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl const operator--(int) // NOLINT(readability-const-return-type)
+    {
+        auto result = *this;
+        --(*this);
+        return result;
+    }
+
+    /*!
+    @brief pre-decrement (--it)
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl& operator--()
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+            {
+                std::advance(m_it.object_iterator, -1);
+                break;
+            }
+
+            case value_t::array:
+            {
+                std::advance(m_it.array_iterator, -1);
+                break;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                --m_it.primitive_iterator;
+                break;
+            }
+        }
+
+        return *this;
+    }
+
+    /*!
+    @brief comparison: equal
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    template < typename IterImpl, detail::enable_if_t < (std::is_same<IterImpl, iter_impl>::value || std::is_same<IterImpl, other_iter_impl>::value), std::nullptr_t > = nullptr >
+    bool operator==(const IterImpl& other) const
+    {
+        // if objects are not the same, the comparison is undefined
+        if (JSON_HEDLEY_UNLIKELY(m_object != other.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(212, "cannot compare iterators of different containers", *m_object));
+        }
+
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+                return (m_it.object_iterator == other.m_it.object_iterator);
+
+            case value_t::array:
+                return (m_it.array_iterator == other.m_it.array_iterator);
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+                return (m_it.primitive_iterator == other.m_it.primitive_iterator);
+        }
+    }
+
+    /*!
+    @brief comparison: not equal
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    template < typename IterImpl, detail::enable_if_t < (std::is_same<IterImpl, iter_impl>::value || std::is_same<IterImpl, other_iter_impl>::value), std::nullptr_t > = nullptr >
+    bool operator!=(const IterImpl& other) const
+    {
+        return !operator==(other);
+    }
+
+    /*!
+    @brief comparison: smaller
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    bool operator<(const iter_impl& other) const
+    {
+        // if objects are not the same, the comparison is undefined
+        if (JSON_HEDLEY_UNLIKELY(m_object != other.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(212, "cannot compare iterators of different containers", *m_object));
+        }
+
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+                JSON_THROW(invalid_iterator::create(213, "cannot compare order of object iterators", *m_object));
+
+            case value_t::array:
+                return (m_it.array_iterator < other.m_it.array_iterator);
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+                return (m_it.primitive_iterator < other.m_it.primitive_iterator);
+        }
+    }
+
+    /*!
+    @brief comparison: less than or equal
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    bool operator<=(const iter_impl& other) const
+    {
+        return !other.operator < (*this);
+    }
+
+    /*!
+    @brief comparison: greater than
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    bool operator>(const iter_impl& other) const
+    {
+        return !operator<=(other);
+    }
+
+    /*!
+    @brief comparison: greater than or equal
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    bool operator>=(const iter_impl& other) const
+    {
+        return !operator<(other);
+    }
+
+    /*!
+    @brief add to iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl& operator+=(difference_type i)
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+                JSON_THROW(invalid_iterator::create(209, "cannot use offsets with object iterators", *m_object));
+
+            case value_t::array:
+            {
+                std::advance(m_it.array_iterator, i);
+                break;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                m_it.primitive_iterator += i;
+                break;
+            }
+        }
+
+        return *this;
+    }
+
+    /*!
+    @brief subtract from iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl& operator-=(difference_type i)
+    {
+        return operator+=(-i);
+    }
+
+    /*!
+    @brief add to iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl operator+(difference_type i) const
+    {
+        auto result = *this;
+        result += i;
+        return result;
+    }
+
+    /*!
+    @brief addition of distance and iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    friend iter_impl operator+(difference_type i, const iter_impl& it)
+    {
+        auto result = it;
+        result += i;
+        return result;
+    }
+
+    /*!
+    @brief subtract from iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    iter_impl operator-(difference_type i) const
+    {
+        auto result = *this;
+        result -= i;
+        return result;
+    }
+
+    /*!
+    @brief return difference
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    difference_type operator-(const iter_impl& other) const
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+                JSON_THROW(invalid_iterator::create(209, "cannot use offsets with object iterators", *m_object));
+
+            case value_t::array:
+                return m_it.array_iterator - other.m_it.array_iterator;
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+                return m_it.primitive_iterator - other.m_it.primitive_iterator;
+        }
+    }
+
+    /*!
+    @brief access to successor
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    reference operator[](difference_type n) const
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        switch (m_object->m_type)
+        {
+            case value_t::object:
+                JSON_THROW(invalid_iterator::create(208, "cannot use operator[] for object iterators", *m_object));
+
+            case value_t::array:
+                return *std::next(m_it.array_iterator, n);
+
+            case value_t::null:
+                JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
+
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.get_value() == -n))
+                {
+                    return *m_object;
+                }
+
+                JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
+            }
+        }
+    }
+
+    /*!
+    @brief return the key of an object iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    const typename object_t::key_type& key() const
+    {
+        JSON_ASSERT(m_object != nullptr);
+
+        if (JSON_HEDLEY_LIKELY(m_object->is_object()))
+        {
+            return m_it.object_iterator->first;
+        }
+
+        JSON_THROW(invalid_iterator::create(207, "cannot use key() for non-object iterators", *m_object));
+    }
+
+    /*!
+    @brief return the value of an iterator
+    @pre The iterator is initialized; i.e. `m_object != nullptr`.
+    */
+    reference value() const
+    {
+        return operator*();
+    }
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    /// associated JSON instance
+    pointer m_object = nullptr;
+    /// the actual iterator of the associated instance
+    internal_iterator<typename std::remove_const<BasicJsonType>::type> m_it {};
+};
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/iterators/iteration_proxy.hpp>
+
+// #include <nlohmann/detail/iterators/json_reverse_iterator.hpp>
+
+
+#include <cstddef> // ptrdiff_t
+#include <iterator> // reverse_iterator
+#include <utility> // declval
+
+namespace nlohmann
+{
+namespace detail
+{
+//////////////////////
+// reverse_iterator //
+//////////////////////
+
+/*!
+@brief a template for a reverse iterator class
+
+@tparam Base the base iterator type to reverse. Valid types are @ref
+iterator (to create @ref reverse_iterator) and @ref const_iterator (to
+create @ref const_reverse_iterator).
+
+@requirement The class satisfies the following concept requirements:
+-
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
+  The iterator that can be moved can be moved in both directions (i.e.
+  incremented and decremented).
+- [OutputIterator](https://en.cppreference.com/w/cpp/named_req/OutputIterator):
+  It is possible to write to the pointed-to element (only if @a Base is
+  @ref iterator).
+
+@since version 1.0.0
+*/
+template<typename Base>
+class json_reverse_iterator : public std::reverse_iterator<Base>
+{
+  public:
+    using difference_type = std::ptrdiff_t;
+    /// shortcut to the reverse iterator adapter
+    using base_iterator = std::reverse_iterator<Base>;
+    /// the reference type for the pointed-to element
+    using reference = typename Base::reference;
+
+    /// create reverse iterator from iterator
+    explicit json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
+        : base_iterator(it) {}
+
+    /// create reverse iterator from base class
+    explicit json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
+
+    /// post-increment (it++)
+    json_reverse_iterator const operator++(int) // NOLINT(readability-const-return-type)
+    {
+        return static_cast<json_reverse_iterator>(base_iterator::operator++(1));
+    }
+
+    /// pre-increment (++it)
+    json_reverse_iterator& operator++()
+    {
+        return static_cast<json_reverse_iterator&>(base_iterator::operator++());
+    }
+
+    /// post-decrement (it--)
+    json_reverse_iterator const operator--(int) // NOLINT(readability-const-return-type)
+    {
+        return static_cast<json_reverse_iterator>(base_iterator::operator--(1));
+    }
+
+    /// pre-decrement (--it)
+    json_reverse_iterator& operator--()
+    {
+        return static_cast<json_reverse_iterator&>(base_iterator::operator--());
+    }
+
+    /// add to iterator
+    json_reverse_iterator& operator+=(difference_type i)
+    {
+        return static_cast<json_reverse_iterator&>(base_iterator::operator+=(i));
+    }
+
+    /// add to iterator
+    json_reverse_iterator operator+(difference_type i) const
+    {
+        return static_cast<json_reverse_iterator>(base_iterator::operator+(i));
+    }
+
+    /// subtract from iterator
+    json_reverse_iterator operator-(difference_type i) const
+    {
+        return static_cast<json_reverse_iterator>(base_iterator::operator-(i));
+    }
+
+    /// return difference
+    difference_type operator-(const json_reverse_iterator& other) const
+    {
+        return base_iterator(*this) - base_iterator(other);
+    }
+
+    /// access to successor
+    reference operator[](difference_type n) const
+    {
+        return *(this->operator+(n));
+    }
+
+    /// return the key of an object iterator
+    auto key() const -> decltype(std::declval<Base>().key())
+    {
+        auto it = --this->base();
+        return it.key();
+    }
+
+    /// return the value of an iterator
+    reference value() const
+    {
+        auto it = --this->base();
+        return it.operator * ();
+    }
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/iterators/primitive_iterator.hpp>
+
+// #include <nlohmann/detail/json_pointer.hpp>
+
+
+#include <algorithm> // all_of
+#include <cctype> // isdigit
+#include <limits> // max
+#include <numeric> // accumulate
+#include <string> // string
+#include <utility> // move
+#include <vector> // vector
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/string_escape.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+template<typename BasicJsonType>
+class json_pointer
+{
+    // allow basic_json to access private members
+    NLOHMANN_BASIC_JSON_TPL_DECLARATION
+    friend class basic_json;
+
+  public:
+    /*!
+    @brief create JSON pointer
+
+    Create a JSON pointer according to the syntax described in
+    [Section 3 of RFC6901](https://tools.ietf.org/html/rfc6901#section-3).
+
+    @param[in] s  string representing the JSON pointer; if omitted, the empty
+                  string is assumed which references the whole JSON value
+
+    @throw parse_error.107 if the given JSON pointer @a s is nonempty and does
+                           not begin with a slash (`/`); see example below
+
+    @throw parse_error.108 if a tilde (`~`) in the given JSON pointer @a s is
+    not followed by `0` (representing `~`) or `1` (representing `/`); see
+    example below
+
+    @liveexample{The example shows the construction several valid JSON pointers
+    as well as the exceptional behavior.,json_pointer}
+
+    @since version 2.0.0
+    */
+    explicit json_pointer(const std::string& s = "")
+        : reference_tokens(split(s))
+    {}
+
+    /*!
+    @brief return a string representation of the JSON pointer
+
+    @invariant For each JSON pointer `ptr`, it holds:
+    @code {.cpp}
+    ptr == json_pointer(ptr.to_string());
+    @endcode
+
+    @return a string representation of the JSON pointer
+
+    @liveexample{The example shows the result of `to_string`.,json_pointer__to_string}
+
+    @since version 2.0.0
+    */
+    std::string to_string() const
+    {
+        return std::accumulate(reference_tokens.begin(), reference_tokens.end(),
+                               std::string{},
+                               [](const std::string & a, const std::string & b)
+        {
+            return a + "/" + detail::escape(b);
+        });
+    }
+
+    /// @copydoc to_string()
+    operator std::string() const
+    {
+        return to_string();
+    }
+
+    /*!
+    @brief append another JSON pointer at the end of this JSON pointer
+
+    @param[in] ptr  JSON pointer to append
+    @return JSON pointer with @a ptr appended
+
+    @liveexample{The example shows the usage of `operator/=`.,json_pointer__operator_add}
+
+    @complexity Linear in the length of @a ptr.
+
+    @sa see @ref operator/=(std::string) to append a reference token
+    @sa see @ref operator/=(std::size_t) to append an array index
+    @sa see @ref operator/(const json_pointer&, const json_pointer&) for a binary operator
+
+    @since version 3.6.0
+    */
+    json_pointer& operator/=(const json_pointer& ptr)
+    {
+        reference_tokens.insert(reference_tokens.end(),
+                                ptr.reference_tokens.begin(),
+                                ptr.reference_tokens.end());
+        return *this;
+    }
+
+    /*!
+    @brief append an unescaped reference token at the end of this JSON pointer
+
+    @param[in] token  reference token to append
+    @return JSON pointer with @a token appended without escaping @a token
+
+    @liveexample{The example shows the usage of `operator/=`.,json_pointer__operator_add}
+
+    @complexity Amortized constant.
+
+    @sa see @ref operator/=(const json_pointer&) to append a JSON pointer
+    @sa see @ref operator/=(std::size_t) to append an array index
+    @sa see @ref operator/(const json_pointer&, std::size_t) for a binary operator
+
+    @since version 3.6.0
+    */
+    json_pointer& operator/=(std::string token)
+    {
+        push_back(std::move(token));
+        return *this;
+    }
+
+    /*!
+    @brief append an array index at the end of this JSON pointer
+
+    @param[in] array_idx  array index to append
+    @return JSON pointer with @a array_idx appended
+
+    @liveexample{The example shows the usage of `operator/=`.,json_pointer__operator_add}
+
+    @complexity Amortized constant.
+
+    @sa see @ref operator/=(const json_pointer&) to append a JSON pointer
+    @sa see @ref operator/=(std::string) to append a reference token
+    @sa see @ref operator/(const json_pointer&, std::string) for a binary operator
+
+    @since version 3.6.0
+    */
+    json_pointer& operator/=(std::size_t array_idx)
+    {
+        return *this /= std::to_string(array_idx);
+    }
+
+    /*!
+    @brief create a new JSON pointer by appending the right JSON pointer at the end of the left JSON pointer
+
+    @param[in] lhs  JSON pointer
+    @param[in] rhs  JSON pointer
+    @return a new JSON pointer with @a rhs appended to @a lhs
+
+    @liveexample{The example shows the usage of `operator/`.,json_pointer__operator_add_binary}
+
+    @complexity Linear in the length of @a lhs and @a rhs.
+
+    @sa see @ref operator/=(const json_pointer&) to append a JSON pointer
+
+    @since version 3.6.0
+    */
+    friend json_pointer operator/(const json_pointer& lhs,
+                                  const json_pointer& rhs)
+    {
+        return json_pointer(lhs) /= rhs;
+    }
+
+    /*!
+    @brief create a new JSON pointer by appending the unescaped token at the end of the JSON pointer
+
+    @param[in] ptr  JSON pointer
+    @param[in] token  reference token
+    @return a new JSON pointer with unescaped @a token appended to @a ptr
+
+    @liveexample{The example shows the usage of `operator/`.,json_pointer__operator_add_binary}
+
+    @complexity Linear in the length of @a ptr.
+
+    @sa see @ref operator/=(std::string) to append a reference token
+
+    @since version 3.6.0
+    */
+    friend json_pointer operator/(const json_pointer& ptr, std::string token) // NOLINT(performance-unnecessary-value-param)
+    {
+        return json_pointer(ptr) /= std::move(token);
+    }
+
+    /*!
+    @brief create a new JSON pointer by appending the array-index-token at the end of the JSON pointer
+
+    @param[in] ptr  JSON pointer
+    @param[in] array_idx  array index
+    @return a new JSON pointer with @a array_idx appended to @a ptr
+
+    @liveexample{The example shows the usage of `operator/`.,json_pointer__operator_add_binary}
+
+    @complexity Linear in the length of @a ptr.
+
+    @sa see @ref operator/=(std::size_t) to append an array index
+
+    @since version 3.6.0
+    */
+    friend json_pointer operator/(const json_pointer& ptr, std::size_t array_idx)
+    {
+        return json_pointer(ptr) /= array_idx;
+    }
+
+    /*!
+    @brief returns the parent of this JSON pointer
+
+    @return parent of this JSON pointer; in case this JSON pointer is the root,
+            the root itself is returned
+
+    @complexity Linear in the length of the JSON pointer.
+
+    @liveexample{The example shows the result of `parent_pointer` for different
+    JSON Pointers.,json_pointer__parent_pointer}
+
+    @since version 3.6.0
+    */
+    json_pointer parent_pointer() const
+    {
+        if (empty())
+        {
+            return *this;
+        }
+
+        json_pointer res = *this;
+        res.pop_back();
+        return res;
+    }
+
+    /*!
+    @brief remove last reference token
+
+    @pre not `empty()`
+
+    @liveexample{The example shows the usage of `pop_back`.,json_pointer__pop_back}
+
+    @complexity Constant.
+
+    @throw out_of_range.405 if JSON pointer has no parent
+
+    @since version 3.6.0
+    */
+    void pop_back()
+    {
+        if (JSON_HEDLEY_UNLIKELY(empty()))
+        {
+            JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent", BasicJsonType()));
+        }
+
+        reference_tokens.pop_back();
+    }
+
+    /*!
+    @brief return last reference token
+
+    @pre not `empty()`
+    @return last reference token
+
+    @liveexample{The example shows the usage of `back`.,json_pointer__back}
+
+    @complexity Constant.
+
+    @throw out_of_range.405 if JSON pointer has no parent
+
+    @since version 3.6.0
+    */
+    const std::string& back() const
+    {
+        if (JSON_HEDLEY_UNLIKELY(empty()))
+        {
+            JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent", BasicJsonType()));
+        }
+
+        return reference_tokens.back();
+    }
+
+    /*!
+    @brief append an unescaped token at the end of the reference pointer
+
+    @param[in] token  token to add
+
+    @complexity Amortized constant.
+
+    @liveexample{The example shows the result of `push_back` for different
+    JSON Pointers.,json_pointer__push_back}
+
+    @since version 3.6.0
+    */
+    void push_back(const std::string& token)
+    {
+        reference_tokens.push_back(token);
+    }
+
+    /// @copydoc push_back(const std::string&)
+    void push_back(std::string&& token)
+    {
+        reference_tokens.push_back(std::move(token));
+    }
+
+    /*!
+    @brief return whether pointer points to the root document
+
+    @return true iff the JSON pointer points to the root document
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @liveexample{The example shows the result of `empty` for different JSON
+    Pointers.,json_pointer__empty}
+
+    @since version 3.6.0
+    */
+    bool empty() const noexcept
+    {
+        return reference_tokens.empty();
+    }
+
+  private:
+    /*!
+    @param[in] s  reference token to be converted into an array index
+
+    @return integer representation of @a s
+
+    @throw parse_error.106  if an array index begins with '0'
+    @throw parse_error.109  if an array index begins not with a digit
+    @throw out_of_range.404 if string @a s could not be converted to an integer
+    @throw out_of_range.410 if an array index exceeds size_type
+    */
+    static typename BasicJsonType::size_type array_index(const std::string& s)
+    {
+        using size_type = typename BasicJsonType::size_type;
+
+        // error condition (cf. RFC 6901, Sect. 4)
+        if (JSON_HEDLEY_UNLIKELY(s.size() > 1 && s[0] == '0'))
+        {
+            JSON_THROW(detail::parse_error::create(106, 0, "array index '" + s + "' must not begin with '0'", BasicJsonType()));
+        }
+
+        // error condition (cf. RFC 6901, Sect. 4)
+        if (JSON_HEDLEY_UNLIKELY(s.size() > 1 && !(s[0] >= '1' && s[0] <= '9')))
+        {
+            JSON_THROW(detail::parse_error::create(109, 0, "array index '" + s + "' is not a number", BasicJsonType()));
+        }
+
+        std::size_t processed_chars = 0;
+        unsigned long long res = 0;  // NOLINT(runtime/int)
+        JSON_TRY
+        {
+            res = std::stoull(s, &processed_chars);
+        }
+        JSON_CATCH(std::out_of_range&)
+        {
+            JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + s + "'", BasicJsonType()));
+        }
+
+        // check if the string was completely read
+        if (JSON_HEDLEY_UNLIKELY(processed_chars != s.size()))
+        {
+            JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + s + "'", BasicJsonType()));
+        }
+
+        // only triggered on special platforms (like 32bit), see also
+        // https://github.com/nlohmann/json/pull/2203
+        if (res >= static_cast<unsigned long long>((std::numeric_limits<size_type>::max)()))  // NOLINT(runtime/int)
+        {
+            JSON_THROW(detail::out_of_range::create(410, "array index " + s + " exceeds size_type", BasicJsonType())); // LCOV_EXCL_LINE
+        }
+
+        return static_cast<size_type>(res);
+    }
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    json_pointer top() const
+    {
+        if (JSON_HEDLEY_UNLIKELY(empty()))
+        {
+            JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent", BasicJsonType()));
+        }
+
+        json_pointer result = *this;
+        result.reference_tokens = {reference_tokens[0]};
+        return result;
+    }
+
+  private:
+    /*!
+    @brief create and return a reference to the pointed to value
+
+    @complexity Linear in the number of reference tokens.
+
+    @throw parse_error.109 if array index is not a number
+    @throw type_error.313 if value cannot be unflattened
+    */
+    BasicJsonType& get_and_create(BasicJsonType& j) const
+    {
+        auto* result = &j;
+
+        // in case no reference tokens exist, return a reference to the JSON value
+        // j which will be overwritten by a primitive value
+        for (const auto& reference_token : reference_tokens)
+        {
+            switch (result->type())
+            {
+                case detail::value_t::null:
+                {
+                    if (reference_token == "0")
+                    {
+                        // start a new array if reference token is 0
+                        result = &result->operator[](0);
+                    }
+                    else
+                    {
+                        // start a new object otherwise
+                        result = &result->operator[](reference_token);
+                    }
+                    break;
+                }
+
+                case detail::value_t::object:
+                {
+                    // create an entry in the object
+                    result = &result->operator[](reference_token);
+                    break;
+                }
+
+                case detail::value_t::array:
+                {
+                    // create an entry in the array
+                    result = &result->operator[](array_index(reference_token));
+                    break;
+                }
+
+                /*
+                The following code is only reached if there exists a reference
+                token _and_ the current value is primitive. In this case, we have
+                an error situation, because primitive values may only occur as
+                single value; that is, with an empty list of reference tokens.
+                */
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                    JSON_THROW(detail::type_error::create(313, "invalid value to unflatten", j));
+            }
+        }
+
+        return *result;
+    }
+
+    /*!
+    @brief return a reference to the pointed to value
+
+    @note This version does not throw if a value is not present, but tries to
+          create nested values instead. For instance, calling this function
+          with pointer `"/this/that"` on a null value is equivalent to calling
+          `operator[]("this").operator[]("that")` on that value, effectively
+          changing the null value to an object.
+
+    @param[in] ptr  a JSON value
+
+    @return reference to the JSON value pointed to by the JSON pointer
+
+    @complexity Linear in the length of the JSON pointer.
+
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+    @throw out_of_range.404  if the JSON pointer can not be resolved
+    */
+    BasicJsonType& get_unchecked(BasicJsonType* ptr) const
+    {
+        for (const auto& reference_token : reference_tokens)
+        {
+            // convert null values to arrays or objects before continuing
+            if (ptr->is_null())
+            {
+                // check if reference token is a number
+                const bool nums =
+                    std::all_of(reference_token.begin(), reference_token.end(),
+                                [](const unsigned char x)
+                {
+                    return std::isdigit(x);
+                });
+
+                // change value to array for numbers or "-" or to object otherwise
+                *ptr = (nums || reference_token == "-")
+                       ? detail::value_t::array
+                       : detail::value_t::object;
+            }
+
+            switch (ptr->type())
+            {
+                case detail::value_t::object:
+                {
+                    // use unchecked object access
+                    ptr = &ptr->operator[](reference_token);
+                    break;
+                }
+
+                case detail::value_t::array:
+                {
+                    if (reference_token == "-")
+                    {
+                        // explicitly treat "-" as index beyond the end
+                        ptr = &ptr->operator[](ptr->m_value.array->size());
+                    }
+                    else
+                    {
+                        // convert array index to number; unchecked access
+                        ptr = &ptr->operator[](array_index(reference_token));
+                    }
+                    break;
+                }
+
+                case detail::value_t::null:
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                    JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'", *ptr));
+            }
+        }
+
+        return *ptr;
+    }
+
+    /*!
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+    @throw out_of_range.402  if the array index '-' is used
+    @throw out_of_range.404  if the JSON pointer can not be resolved
+    */
+    BasicJsonType& get_checked(BasicJsonType* ptr) const
+    {
+        for (const auto& reference_token : reference_tokens)
+        {
+            switch (ptr->type())
+            {
+                case detail::value_t::object:
+                {
+                    // note: at performs range check
+                    ptr = &ptr->at(reference_token);
+                    break;
+                }
+
+                case detail::value_t::array:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+                    {
+                        // "-" always fails the range check
+                        JSON_THROW(detail::out_of_range::create(402,
+                                                                "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
+                                                                ") is out of range", *ptr));
+                    }
+
+                    // note: at performs range check
+                    ptr = &ptr->at(array_index(reference_token));
+                    break;
+                }
+
+                case detail::value_t::null:
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                    JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'", *ptr));
+            }
+        }
+
+        return *ptr;
+    }
+
+    /*!
+    @brief return a const reference to the pointed to value
+
+    @param[in] ptr  a JSON value
+
+    @return const reference to the JSON value pointed to by the JSON
+    pointer
+
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+    @throw out_of_range.402  if the array index '-' is used
+    @throw out_of_range.404  if the JSON pointer can not be resolved
+    */
+    const BasicJsonType& get_unchecked(const BasicJsonType* ptr) const
+    {
+        for (const auto& reference_token : reference_tokens)
+        {
+            switch (ptr->type())
+            {
+                case detail::value_t::object:
+                {
+                    // use unchecked object access
+                    ptr = &ptr->operator[](reference_token);
+                    break;
+                }
+
+                case detail::value_t::array:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+                    {
+                        // "-" cannot be used for const access
+                        JSON_THROW(detail::out_of_range::create(402, "array index '-' (" + std::to_string(ptr->m_value.array->size()) + ") is out of range", *ptr));
+                    }
+
+                    // use unchecked array access
+                    ptr = &ptr->operator[](array_index(reference_token));
+                    break;
+                }
+
+                case detail::value_t::null:
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                    JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'", *ptr));
+            }
+        }
+
+        return *ptr;
+    }
+
+    /*!
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+    @throw out_of_range.402  if the array index '-' is used
+    @throw out_of_range.404  if the JSON pointer can not be resolved
+    */
+    const BasicJsonType& get_checked(const BasicJsonType* ptr) const
+    {
+        for (const auto& reference_token : reference_tokens)
+        {
+            switch (ptr->type())
+            {
+                case detail::value_t::object:
+                {
+                    // note: at performs range check
+                    ptr = &ptr->at(reference_token);
+                    break;
+                }
+
+                case detail::value_t::array:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+                    {
+                        // "-" always fails the range check
+                        JSON_THROW(detail::out_of_range::create(402,
+                                                                "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
+                                                                ") is out of range", *ptr));
+                    }
+
+                    // note: at performs range check
+                    ptr = &ptr->at(array_index(reference_token));
+                    break;
+                }
+
+                case detail::value_t::null:
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                    JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'", *ptr));
+            }
+        }
+
+        return *ptr;
+    }
+
+    /*!
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+    */
+    bool contains(const BasicJsonType* ptr) const
+    {
+        for (const auto& reference_token : reference_tokens)
+        {
+            switch (ptr->type())
+            {
+                case detail::value_t::object:
+                {
+                    if (!ptr->contains(reference_token))
+                    {
+                        // we did not find the key in the object
+                        return false;
+                    }
+
+                    ptr = &ptr->operator[](reference_token);
+                    break;
+                }
+
+                case detail::value_t::array:
+                {
+                    if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+                    {
+                        // "-" always fails the range check
+                        return false;
+                    }
+                    if (JSON_HEDLEY_UNLIKELY(reference_token.size() == 1 && !("0" <= reference_token && reference_token <= "9")))
+                    {
+                        // invalid char
+                        return false;
+                    }
+                    if (JSON_HEDLEY_UNLIKELY(reference_token.size() > 1))
+                    {
+                        if (JSON_HEDLEY_UNLIKELY(!('1' <= reference_token[0] && reference_token[0] <= '9')))
+                        {
+                            // first char should be between '1' and '9'
+                            return false;
+                        }
+                        for (std::size_t i = 1; i < reference_token.size(); i++)
+                        {
+                            if (JSON_HEDLEY_UNLIKELY(!('0' <= reference_token[i] && reference_token[i] <= '9')))
+                            {
+                                // other char should be between '0' and '9'
+                                return false;
+                            }
+                        }
+                    }
+
+                    const auto idx = array_index(reference_token);
+                    if (idx >= ptr->size())
+                    {
+                        // index out of range
+                        return false;
+                    }
+
+                    ptr = &ptr->operator[](idx);
+                    break;
+                }
+
+                case detail::value_t::null:
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                {
+                    // we do not expect primitive values if there is still a
+                    // reference token to process
+                    return false;
+                }
+            }
+        }
+
+        // no reference token left means we found a primitive value
+        return true;
+    }
+
+    /*!
+    @brief split the string input to reference tokens
+
+    @note This function is only called by the json_pointer constructor.
+          All exceptions below are documented there.
+
+    @throw parse_error.107  if the pointer is not empty or begins with '/'
+    @throw parse_error.108  if character '~' is not followed by '0' or '1'
+    */
+    static std::vector<std::string> split(const std::string& reference_string)
+    {
+        std::vector<std::string> result;
+
+        // special case: empty reference string -> no reference tokens
+        if (reference_string.empty())
+        {
+            return result;
+        }
+
+        // check if nonempty reference string begins with slash
+        if (JSON_HEDLEY_UNLIKELY(reference_string[0] != '/'))
+        {
+            JSON_THROW(detail::parse_error::create(107, 1, "JSON pointer must be empty or begin with '/' - was: '" + reference_string + "'", BasicJsonType()));
+        }
+
+        // extract the reference tokens:
+        // - slash: position of the last read slash (or end of string)
+        // - start: position after the previous slash
+        for (
+            // search for the first slash after the first character
+            std::size_t slash = reference_string.find_first_of('/', 1),
+            // set the beginning of the first reference token
+            start = 1;
+            // we can stop if start == 0 (if slash == std::string::npos)
+            start != 0;
+            // set the beginning of the next reference token
+            // (will eventually be 0 if slash == std::string::npos)
+            start = (slash == std::string::npos) ? 0 : slash + 1,
+            // find next slash
+            slash = reference_string.find_first_of('/', start))
+        {
+            // use the text between the beginning of the reference token
+            // (start) and the last slash (slash).
+            auto reference_token = reference_string.substr(start, slash - start);
+
+            // check reference tokens are properly escaped
+            for (std::size_t pos = reference_token.find_first_of('~');
+                    pos != std::string::npos;
+                    pos = reference_token.find_first_of('~', pos + 1))
+            {
+                JSON_ASSERT(reference_token[pos] == '~');
+
+                // ~ must be followed by 0 or 1
+                if (JSON_HEDLEY_UNLIKELY(pos == reference_token.size() - 1 ||
+                                         (reference_token[pos + 1] != '0' &&
+                                          reference_token[pos + 1] != '1')))
+                {
+                    JSON_THROW(detail::parse_error::create(108, 0, "escape character '~' must be followed with '0' or '1'", BasicJsonType()));
+                }
+            }
+
+            // finally, store the reference token
+            detail::unescape(reference_token);
+            result.push_back(reference_token);
+        }
+
+        return result;
+    }
+
+  private:
+    /*!
+    @param[in] reference_string  the reference string to the current value
+    @param[in] value             the value to consider
+    @param[in,out] result        the result object to insert values to
+
+    @note Empty objects or arrays are flattened to `null`.
+    */
+    static void flatten(const std::string& reference_string,
+                        const BasicJsonType& value,
+                        BasicJsonType& result)
+    {
+        switch (value.type())
+        {
+            case detail::value_t::array:
+            {
+                if (value.m_value.array->empty())
+                {
+                    // flatten empty array as null
+                    result[reference_string] = nullptr;
+                }
+                else
+                {
+                    // iterate array and use index as reference string
+                    for (std::size_t i = 0; i < value.m_value.array->size(); ++i)
+                    {
+                        flatten(reference_string + "/" + std::to_string(i),
+                                value.m_value.array->operator[](i), result);
+                    }
+                }
+                break;
+            }
+
+            case detail::value_t::object:
+            {
+                if (value.m_value.object->empty())
+                {
+                    // flatten empty object as null
+                    result[reference_string] = nullptr;
+                }
+                else
+                {
+                    // iterate object and use keys as reference string
+                    for (const auto& element : *value.m_value.object)
+                    {
+                        flatten(reference_string + "/" + detail::escape(element.first), element.second, result);
+                    }
+                }
+                break;
+            }
+
+            case detail::value_t::null:
+            case detail::value_t::string:
+            case detail::value_t::boolean:
+            case detail::value_t::number_integer:
+            case detail::value_t::number_unsigned:
+            case detail::value_t::number_float:
+            case detail::value_t::binary:
+            case detail::value_t::discarded:
+            default:
+            {
+                // add primitive value with its reference string
+                result[reference_string] = value;
+                break;
+            }
+        }
+    }
+
+    /*!
+    @param[in] value  flattened JSON
+
+    @return unflattened JSON
+
+    @throw parse_error.109 if array index is not a number
+    @throw type_error.314  if value is not an object
+    @throw type_error.315  if object values are not primitive
+    @throw type_error.313  if value cannot be unflattened
+    */
+    static BasicJsonType
+    unflatten(const BasicJsonType& value)
+    {
+        if (JSON_HEDLEY_UNLIKELY(!value.is_object()))
+        {
+            JSON_THROW(detail::type_error::create(314, "only objects can be unflattened", value));
+        }
+
+        BasicJsonType result;
+
+        // iterate the JSON object values
+        for (const auto& element : *value.m_value.object)
+        {
+            if (JSON_HEDLEY_UNLIKELY(!element.second.is_primitive()))
+            {
+                JSON_THROW(detail::type_error::create(315, "values in object must be primitive", element.second));
+            }
+
+            // assign value to reference pointed to by JSON pointer; Note that if
+            // the JSON pointer is "" (i.e., points to the whole value), function
+            // get_and_create returns a reference to result itself. An assignment
+            // will then create a primitive value.
+            json_pointer(element.first).get_and_create(result) = element.second;
+        }
+
+        return result;
+    }
+
+    /*!
+    @brief compares two JSON pointers for equality
+
+    @param[in] lhs  JSON pointer to compare
+    @param[in] rhs  JSON pointer to compare
+    @return whether @a lhs is equal to @a rhs
+
+    @complexity Linear in the length of the JSON pointer
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+    */
+    friend bool operator==(json_pointer const& lhs,
+                           json_pointer const& rhs) noexcept
+    {
+        return lhs.reference_tokens == rhs.reference_tokens;
+    }
+
+    /*!
+    @brief compares two JSON pointers for inequality
+
+    @param[in] lhs  JSON pointer to compare
+    @param[in] rhs  JSON pointer to compare
+    @return whether @a lhs is not equal @a rhs
+
+    @complexity Linear in the length of the JSON pointer
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+    */
+    friend bool operator!=(json_pointer const& lhs,
+                           json_pointer const& rhs) noexcept
+    {
+        return !(lhs == rhs);
+    }
+
+    /// the reference tokens
+    std::vector<std::string> reference_tokens;
+};
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/json_ref.hpp>
+
+
+#include <initializer_list>
+#include <utility>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename BasicJsonType>
+class json_ref
+{
+  public:
+    using value_type = BasicJsonType;
+
+    json_ref(value_type&& value)
+        : owned_value(std::move(value))
+    {}
+
+    json_ref(const value_type& value)
+        : value_ref(&value)
+    {}
+
+    json_ref(std::initializer_list<json_ref> init)
+        : owned_value(init)
+    {}
+
+    template <
+        class... Args,
+        enable_if_t<std::is_constructible<value_type, Args...>::value, int> = 0 >
+    json_ref(Args && ... args)
+        : owned_value(std::forward<Args>(args)...)
+    {}
+
+    // class should be movable only
+    json_ref(json_ref&&) noexcept = default;
+    json_ref(const json_ref&) = delete;
+    json_ref& operator=(const json_ref&) = delete;
+    json_ref& operator=(json_ref&&) = delete;
+    ~json_ref() = default;
+
+    value_type moved_or_copied() const
+    {
+        if (value_ref == nullptr)
+        {
+            return std::move(owned_value);
+        }
+        return *value_ref;
+    }
+
+    value_type const& operator*() const
+    {
+        return value_ref ? *value_ref : owned_value;
+    }
+
+    value_type const* operator->() const
+    {
+        return &** this;
+    }
+
+  private:
+    mutable value_type owned_value = nullptr;
+    value_type const* value_ref = nullptr;
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/string_escape.hpp>
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/output/binary_writer.hpp>
+
+
+#include <algorithm> // reverse
+#include <array> // array
+#include <cmath> // isnan, isinf
+#include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
+#include <cstring> // memcpy
+#include <limits> // numeric_limits
+#include <string> // string
+#include <utility> // move
+
+// #include <nlohmann/detail/input/binary_reader.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/output/output_adapters.hpp>
+
+
+#include <algorithm> // copy
+#include <cstddef> // size_t
+#include <iterator> // back_inserter
+#include <memory> // shared_ptr, make_shared
+#include <string> // basic_string
+#include <vector> // vector
+
+#ifndef JSON_NO_IO
+    #include <ios>      // streamsize
+    #include <ostream>  // basic_ostream
+#endif  // JSON_NO_IO
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+/// abstract output adapter interface
+template<typename CharType> struct output_adapter_protocol
+{
+    virtual void write_character(CharType c) = 0;
+    virtual void write_characters(const CharType* s, std::size_t length) = 0;
+    virtual ~output_adapter_protocol() = default;
+
+    output_adapter_protocol() = default;
+    output_adapter_protocol(const output_adapter_protocol&) = default;
+    output_adapter_protocol(output_adapter_protocol&&) noexcept = default;
+    output_adapter_protocol& operator=(const output_adapter_protocol&) = default;
+    output_adapter_protocol& operator=(output_adapter_protocol&&) noexcept = default;
+};
+
+/// a type to simplify interfaces
+template<typename CharType>
+using output_adapter_t = std::shared_ptr<output_adapter_protocol<CharType>>;
+
+/// output adapter for byte vectors
+template<typename CharType, typename AllocatorType = std::allocator<CharType>>
+class output_vector_adapter : public output_adapter_protocol<CharType>
+{
+  public:
+    explicit output_vector_adapter(std::vector<CharType, AllocatorType>& vec) noexcept
+        : v(vec)
+    {}
+
+    void write_character(CharType c) override
+    {
+        v.push_back(c);
+    }
+
+    JSON_HEDLEY_NON_NULL(2)
+    void write_characters(const CharType* s, std::size_t length) override
+    {
+        std::copy(s, s + length, std::back_inserter(v));
+    }
+
+  private:
+    std::vector<CharType, AllocatorType>& v;
+};
+
+#ifndef JSON_NO_IO
+/// output adapter for output streams
+template<typename CharType>
+class output_stream_adapter : public output_adapter_protocol<CharType>
+{
+  public:
+    explicit output_stream_adapter(std::basic_ostream<CharType>& s) noexcept
+        : stream(s)
+    {}
+
+    void write_character(CharType c) override
+    {
+        stream.put(c);
+    }
+
+    JSON_HEDLEY_NON_NULL(2)
+    void write_characters(const CharType* s, std::size_t length) override
+    {
+        stream.write(s, static_cast<std::streamsize>(length));
+    }
+
+  private:
+    std::basic_ostream<CharType>& stream;
+};
+#endif  // JSON_NO_IO
+
+/// output adapter for basic_string
+template<typename CharType, typename StringType = std::basic_string<CharType>>
+class output_string_adapter : public output_adapter_protocol<CharType>
+{
+  public:
+    explicit output_string_adapter(StringType& s) noexcept
+        : str(s)
+    {}
+
+    void write_character(CharType c) override
+    {
+        str.push_back(c);
+    }
+
+    JSON_HEDLEY_NON_NULL(2)
+    void write_characters(const CharType* s, std::size_t length) override
+    {
+        str.append(s, length);
+    }
+
+  private:
+    StringType& str;
+};
+
+template<typename CharType, typename StringType = std::basic_string<CharType>>
+class output_adapter
+{
+  public:
+    template<typename AllocatorType = std::allocator<CharType>>
+    output_adapter(std::vector<CharType, AllocatorType>& vec)
+        : oa(std::make_shared<output_vector_adapter<CharType, AllocatorType>>(vec)) {}
+
+#ifndef JSON_NO_IO
+    output_adapter(std::basic_ostream<CharType>& s)
+        : oa(std::make_shared<output_stream_adapter<CharType>>(s)) {}
+#endif  // JSON_NO_IO
+
+    output_adapter(StringType& s)
+        : oa(std::make_shared<output_string_adapter<CharType, StringType>>(s)) {}
+
+    operator output_adapter_t<CharType>()
+    {
+        return oa;
+    }
+
+  private:
+    output_adapter_t<CharType> oa = nullptr;
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+
+namespace nlohmann
+{
+namespace detail
+{
+///////////////////
+// binary writer //
+///////////////////
+
+/*!
+@brief serialization to CBOR and MessagePack values
+*/
+template<typename BasicJsonType, typename CharType>
+class binary_writer
+{
+    using string_t = typename BasicJsonType::string_t;
+    using binary_t = typename BasicJsonType::binary_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+
+  public:
+    /*!
+    @brief create a binary writer
+
+    @param[in] adapter  output adapter to write to
+    */
+    explicit binary_writer(output_adapter_t<CharType> adapter) : oa(std::move(adapter))
+    {
+        JSON_ASSERT(oa);
+    }
+
+    /*!
+    @param[in] j  JSON value to serialize
+    @pre       j.type() == value_t::object
+    */
+    void write_bson(const BasicJsonType& j)
+    {
+        switch (j.type())
+        {
+            case value_t::object:
+            {
+                write_bson_object(*j.m_value.object);
+                break;
+            }
+
+            case value_t::null:
+            case value_t::array:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                JSON_THROW(type_error::create(317, "to serialize to BSON, top-level type must be object, but is " + std::string(j.type_name()), j));
+            }
+        }
+    }
+
+    /*!
+    @param[in] j  JSON value to serialize
+    */
+    void write_cbor(const BasicJsonType& j)
+    {
+        switch (j.type())
+        {
+            case value_t::null:
+            {
+                oa->write_character(to_char_type(0xF6));
+                break;
+            }
+
+            case value_t::boolean:
+            {
+                oa->write_character(j.m_value.boolean
+                                    ? to_char_type(0xF5)
+                                    : to_char_type(0xF4));
+                break;
+            }
+
+            case value_t::number_integer:
+            {
+                if (j.m_value.number_integer >= 0)
+                {
+                    // CBOR does not differentiate between positive signed
+                    // integers and unsigned integers. Therefore, we used the
+                    // code from the value_t::number_unsigned case here.
+                    if (j.m_value.number_integer <= 0x17)
+                    {
+                        write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_integer <= (std::numeric_limits<std::uint8_t>::max)())
+                    {
+                        oa->write_character(to_char_type(0x18));
+                        write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_integer <= (std::numeric_limits<std::uint16_t>::max)())
+                    {
+                        oa->write_character(to_char_type(0x19));
+                        write_number(static_cast<std::uint16_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_integer <= (std::numeric_limits<std::uint32_t>::max)())
+                    {
+                        oa->write_character(to_char_type(0x1A));
+                        write_number(static_cast<std::uint32_t>(j.m_value.number_integer));
+                    }
+                    else
+                    {
+                        oa->write_character(to_char_type(0x1B));
+                        write_number(static_cast<std::uint64_t>(j.m_value.number_integer));
+                    }
+                }
+                else
+                {
+                    // The conversions below encode the sign in the first
+                    // byte, and the value is converted to a positive number.
+                    const auto positive_number = -1 - j.m_value.number_integer;
+                    if (j.m_value.number_integer >= -24)
+                    {
+                        write_number(static_cast<std::uint8_t>(0x20 + positive_number));
+                    }
+                    else if (positive_number <= (std::numeric_limits<std::uint8_t>::max)())
+                    {
+                        oa->write_character(to_char_type(0x38));
+                        write_number(static_cast<std::uint8_t>(positive_number));
+                    }
+                    else if (positive_number <= (std::numeric_limits<std::uint16_t>::max)())
+                    {
+                        oa->write_character(to_char_type(0x39));
+                        write_number(static_cast<std::uint16_t>(positive_number));
+                    }
+                    else if (positive_number <= (std::numeric_limits<std::uint32_t>::max)())
+                    {
+                        oa->write_character(to_char_type(0x3A));
+                        write_number(static_cast<std::uint32_t>(positive_number));
+                    }
+                    else
+                    {
+                        oa->write_character(to_char_type(0x3B));
+                        write_number(static_cast<std::uint64_t>(positive_number));
+                    }
+                }
+                break;
+            }
+
+            case value_t::number_unsigned:
+            {
+                if (j.m_value.number_unsigned <= 0x17)
+                {
+                    write_number(static_cast<std::uint8_t>(j.m_value.number_unsigned));
+                }
+                else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x18));
+                    write_number(static_cast<std::uint8_t>(j.m_value.number_unsigned));
+                }
+                else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x19));
+                    write_number(static_cast<std::uint16_t>(j.m_value.number_unsigned));
+                }
+                else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x1A));
+                    write_number(static_cast<std::uint32_t>(j.m_value.number_unsigned));
+                }
+                else
+                {
+                    oa->write_character(to_char_type(0x1B));
+                    write_number(static_cast<std::uint64_t>(j.m_value.number_unsigned));
+                }
+                break;
+            }
+
+            case value_t::number_float:
+            {
+                if (std::isnan(j.m_value.number_float))
+                {
+                    // NaN is 0xf97e00 in CBOR
+                    oa->write_character(to_char_type(0xF9));
+                    oa->write_character(to_char_type(0x7E));
+                    oa->write_character(to_char_type(0x00));
+                }
+                else if (std::isinf(j.m_value.number_float))
+                {
+                    // Infinity is 0xf97c00, -Infinity is 0xf9fc00
+                    oa->write_character(to_char_type(0xf9));
+                    oa->write_character(j.m_value.number_float > 0 ? to_char_type(0x7C) : to_char_type(0xFC));
+                    oa->write_character(to_char_type(0x00));
+                }
+                else
+                {
+                    write_compact_float(j.m_value.number_float, detail::input_format_t::cbor);
+                }
+                break;
+            }
+
+            case value_t::string:
+            {
+                // step 1: write control byte and the string length
+                const auto N = j.m_value.string->size();
+                if (N <= 0x17)
+                {
+                    write_number(static_cast<std::uint8_t>(0x60 + N));
+                }
+                else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x78));
+                    write_number(static_cast<std::uint8_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x79));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x7A));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+                // LCOV_EXCL_START
+                else if (N <= (std::numeric_limits<std::uint64_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x7B));
+                    write_number(static_cast<std::uint64_t>(N));
+                }
+                // LCOV_EXCL_STOP
+
+                // step 2: write the string
+                oa->write_characters(
+                    reinterpret_cast<const CharType*>(j.m_value.string->c_str()),
+                    j.m_value.string->size());
+                break;
+            }
+
+            case value_t::array:
+            {
+                // step 1: write control byte and the array size
+                const auto N = j.m_value.array->size();
+                if (N <= 0x17)
+                {
+                    write_number(static_cast<std::uint8_t>(0x80 + N));
+                }
+                else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x98));
+                    write_number(static_cast<std::uint8_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x99));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x9A));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+                // LCOV_EXCL_START
+                else if (N <= (std::numeric_limits<std::uint64_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x9B));
+                    write_number(static_cast<std::uint64_t>(N));
+                }
+                // LCOV_EXCL_STOP
+
+                // step 2: write each element
+                for (const auto& el : *j.m_value.array)
+                {
+                    write_cbor(el);
+                }
+                break;
+            }
+
+            case value_t::binary:
+            {
+                if (j.m_value.binary->has_subtype())
+                {
+                    if (j.m_value.binary->subtype() <= (std::numeric_limits<std::uint8_t>::max)())
+                    {
+                        write_number(static_cast<std::uint8_t>(0xd8));
+                        write_number(static_cast<std::uint8_t>(j.m_value.binary->subtype()));
+                    }
+                    else if (j.m_value.binary->subtype() <= (std::numeric_limits<std::uint16_t>::max)())
+                    {
+                        write_number(static_cast<std::uint8_t>(0xd9));
+                        write_number(static_cast<std::uint16_t>(j.m_value.binary->subtype()));
+                    }
+                    else if (j.m_value.binary->subtype() <= (std::numeric_limits<std::uint32_t>::max)())
+                    {
+                        write_number(static_cast<std::uint8_t>(0xda));
+                        write_number(static_cast<std::uint32_t>(j.m_value.binary->subtype()));
+                    }
+                    else if (j.m_value.binary->subtype() <= (std::numeric_limits<std::uint64_t>::max)())
+                    {
+                        write_number(static_cast<std::uint8_t>(0xdb));
+                        write_number(static_cast<std::uint64_t>(j.m_value.binary->subtype()));
+                    }
+                }
+
+                // step 1: write control byte and the binary array size
+                const auto N = j.m_value.binary->size();
+                if (N <= 0x17)
+                {
+                    write_number(static_cast<std::uint8_t>(0x40 + N));
+                }
+                else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x58));
+                    write_number(static_cast<std::uint8_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x59));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x5A));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+                // LCOV_EXCL_START
+                else if (N <= (std::numeric_limits<std::uint64_t>::max)())
+                {
+                    oa->write_character(to_char_type(0x5B));
+                    write_number(static_cast<std::uint64_t>(N));
+                }
+                // LCOV_EXCL_STOP
+
+                // step 2: write each element
+                oa->write_characters(
+                    reinterpret_cast<const CharType*>(j.m_value.binary->data()),
+                    N);
+
+                break;
+            }
+
+            case value_t::object:
+            {
+                // step 1: write control byte and the object size
+                const auto N = j.m_value.object->size();
+                if (N <= 0x17)
+                {
+                    write_number(static_cast<std::uint8_t>(0xA0 + N));
+                }
+                else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    oa->write_character(to_char_type(0xB8));
+                    write_number(static_cast<std::uint8_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    oa->write_character(to_char_type(0xB9));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    oa->write_character(to_char_type(0xBA));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+                // LCOV_EXCL_START
+                else if (N <= (std::numeric_limits<std::uint64_t>::max)())
+                {
+                    oa->write_character(to_char_type(0xBB));
+                    write_number(static_cast<std::uint64_t>(N));
+                }
+                // LCOV_EXCL_STOP
+
+                // step 2: write each element
+                for (const auto& el : *j.m_value.object)
+                {
+                    write_cbor(el.first);
+                    write_cbor(el.second);
+                }
+                break;
+            }
+
+            case value_t::discarded:
+            default:
+                break;
+        }
+    }
+
+    /*!
+    @param[in] j  JSON value to serialize
+    */
+    void write_msgpack(const BasicJsonType& j)
+    {
+        switch (j.type())
+        {
+            case value_t::null: // nil
+            {
+                oa->write_character(to_char_type(0xC0));
+                break;
+            }
+
+            case value_t::boolean: // true and false
+            {
+                oa->write_character(j.m_value.boolean
+                                    ? to_char_type(0xC3)
+                                    : to_char_type(0xC2));
+                break;
+            }
+
+            case value_t::number_integer:
+            {
+                if (j.m_value.number_integer >= 0)
+                {
+                    // MessagePack does not differentiate between positive
+                    // signed integers and unsigned integers. Therefore, we used
+                    // the code from the value_t::number_unsigned case here.
+                    if (j.m_value.number_unsigned < 128)
+                    {
+                        // positive fixnum
+                        write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint8_t>::max)())
+                    {
+                        // uint 8
+                        oa->write_character(to_char_type(0xCC));
+                        write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint16_t>::max)())
+                    {
+                        // uint 16
+                        oa->write_character(to_char_type(0xCD));
+                        write_number(static_cast<std::uint16_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint32_t>::max)())
+                    {
+                        // uint 32
+                        oa->write_character(to_char_type(0xCE));
+                        write_number(static_cast<std::uint32_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint64_t>::max)())
+                    {
+                        // uint 64
+                        oa->write_character(to_char_type(0xCF));
+                        write_number(static_cast<std::uint64_t>(j.m_value.number_integer));
+                    }
+                }
+                else
+                {
+                    if (j.m_value.number_integer >= -32)
+                    {
+                        // negative fixnum
+                        write_number(static_cast<std::int8_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_integer >= (std::numeric_limits<std::int8_t>::min)() &&
+                             j.m_value.number_integer <= (std::numeric_limits<std::int8_t>::max)())
+                    {
+                        // int 8
+                        oa->write_character(to_char_type(0xD0));
+                        write_number(static_cast<std::int8_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_integer >= (std::numeric_limits<std::int16_t>::min)() &&
+                             j.m_value.number_integer <= (std::numeric_limits<std::int16_t>::max)())
+                    {
+                        // int 16
+                        oa->write_character(to_char_type(0xD1));
+                        write_number(static_cast<std::int16_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_integer >= (std::numeric_limits<std::int32_t>::min)() &&
+                             j.m_value.number_integer <= (std::numeric_limits<std::int32_t>::max)())
+                    {
+                        // int 32
+                        oa->write_character(to_char_type(0xD2));
+                        write_number(static_cast<std::int32_t>(j.m_value.number_integer));
+                    }
+                    else if (j.m_value.number_integer >= (std::numeric_limits<std::int64_t>::min)() &&
+                             j.m_value.number_integer <= (std::numeric_limits<std::int64_t>::max)())
+                    {
+                        // int 64
+                        oa->write_character(to_char_type(0xD3));
+                        write_number(static_cast<std::int64_t>(j.m_value.number_integer));
+                    }
+                }
+                break;
+            }
+
+            case value_t::number_unsigned:
+            {
+                if (j.m_value.number_unsigned < 128)
+                {
+                    // positive fixnum
+                    write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
+                }
+                else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    // uint 8
+                    oa->write_character(to_char_type(0xCC));
+                    write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
+                }
+                else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    // uint 16
+                    oa->write_character(to_char_type(0xCD));
+                    write_number(static_cast<std::uint16_t>(j.m_value.number_integer));
+                }
+                else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    // uint 32
+                    oa->write_character(to_char_type(0xCE));
+                    write_number(static_cast<std::uint32_t>(j.m_value.number_integer));
+                }
+                else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint64_t>::max)())
+                {
+                    // uint 64
+                    oa->write_character(to_char_type(0xCF));
+                    write_number(static_cast<std::uint64_t>(j.m_value.number_integer));
+                }
+                break;
+            }
+
+            case value_t::number_float:
+            {
+                write_compact_float(j.m_value.number_float, detail::input_format_t::msgpack);
+                break;
+            }
+
+            case value_t::string:
+            {
+                // step 1: write control byte and the string length
+                const auto N = j.m_value.string->size();
+                if (N <= 31)
+                {
+                    // fixstr
+                    write_number(static_cast<std::uint8_t>(0xA0 | N));
+                }
+                else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    // str 8
+                    oa->write_character(to_char_type(0xD9));
+                    write_number(static_cast<std::uint8_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    // str 16
+                    oa->write_character(to_char_type(0xDA));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    // str 32
+                    oa->write_character(to_char_type(0xDB));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+
+                // step 2: write the string
+                oa->write_characters(
+                    reinterpret_cast<const CharType*>(j.m_value.string->c_str()),
+                    j.m_value.string->size());
+                break;
+            }
+
+            case value_t::array:
+            {
+                // step 1: write control byte and the array size
+                const auto N = j.m_value.array->size();
+                if (N <= 15)
+                {
+                    // fixarray
+                    write_number(static_cast<std::uint8_t>(0x90 | N));
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    // array 16
+                    oa->write_character(to_char_type(0xDC));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    // array 32
+                    oa->write_character(to_char_type(0xDD));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+
+                // step 2: write each element
+                for (const auto& el : *j.m_value.array)
+                {
+                    write_msgpack(el);
+                }
+                break;
+            }
+
+            case value_t::binary:
+            {
+                // step 0: determine if the binary type has a set subtype to
+                // determine whether or not to use the ext or fixext types
+                const bool use_ext = j.m_value.binary->has_subtype();
+
+                // step 1: write control byte and the byte string length
+                const auto N = j.m_value.binary->size();
+                if (N <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    std::uint8_t output_type{};
+                    bool fixed = true;
+                    if (use_ext)
+                    {
+                        switch (N)
+                        {
+                            case 1:
+                                output_type = 0xD4; // fixext 1
+                                break;
+                            case 2:
+                                output_type = 0xD5; // fixext 2
+                                break;
+                            case 4:
+                                output_type = 0xD6; // fixext 4
+                                break;
+                            case 8:
+                                output_type = 0xD7; // fixext 8
+                                break;
+                            case 16:
+                                output_type = 0xD8; // fixext 16
+                                break;
+                            default:
+                                output_type = 0xC7; // ext 8
+                                fixed = false;
+                                break;
+                        }
+
+                    }
+                    else
+                    {
+                        output_type = 0xC4; // bin 8
+                        fixed = false;
+                    }
+
+                    oa->write_character(to_char_type(output_type));
+                    if (!fixed)
+                    {
+                        write_number(static_cast<std::uint8_t>(N));
+                    }
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    std::uint8_t output_type = use_ext
+                                               ? 0xC8 // ext 16
+                                               : 0xC5; // bin 16
+
+                    oa->write_character(to_char_type(output_type));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    std::uint8_t output_type = use_ext
+                                               ? 0xC9 // ext 32
+                                               : 0xC6; // bin 32
+
+                    oa->write_character(to_char_type(output_type));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+
+                // step 1.5: if this is an ext type, write the subtype
+                if (use_ext)
+                {
+                    write_number(static_cast<std::int8_t>(j.m_value.binary->subtype()));
+                }
+
+                // step 2: write the byte string
+                oa->write_characters(
+                    reinterpret_cast<const CharType*>(j.m_value.binary->data()),
+                    N);
+
+                break;
+            }
+
+            case value_t::object:
+            {
+                // step 1: write control byte and the object size
+                const auto N = j.m_value.object->size();
+                if (N <= 15)
+                {
+                    // fixmap
+                    write_number(static_cast<std::uint8_t>(0x80 | (N & 0xF)));
+                }
+                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+                {
+                    // map 16
+                    oa->write_character(to_char_type(0xDE));
+                    write_number(static_cast<std::uint16_t>(N));
+                }
+                else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+                {
+                    // map 32
+                    oa->write_character(to_char_type(0xDF));
+                    write_number(static_cast<std::uint32_t>(N));
+                }
+
+                // step 2: write each element
+                for (const auto& el : *j.m_value.object)
+                {
+                    write_msgpack(el.first);
+                    write_msgpack(el.second);
+                }
+                break;
+            }
+
+            case value_t::discarded:
+            default:
+                break;
+        }
+    }
+
+    /*!
+    @param[in] j  JSON value to serialize
+    @param[in] use_count   whether to use '#' prefixes (optimized format)
+    @param[in] use_type    whether to use '$' prefixes (optimized format)
+    @param[in] add_prefix  whether prefixes need to be used for this value
+    */
+    void write_ubjson(const BasicJsonType& j, const bool use_count,
+                      const bool use_type, const bool add_prefix = true)
+    {
+        switch (j.type())
+        {
+            case value_t::null:
+            {
+                if (add_prefix)
+                {
+                    oa->write_character(to_char_type('Z'));
+                }
+                break;
+            }
+
+            case value_t::boolean:
+            {
+                if (add_prefix)
+                {
+                    oa->write_character(j.m_value.boolean
+                                        ? to_char_type('T')
+                                        : to_char_type('F'));
+                }
+                break;
+            }
+
+            case value_t::number_integer:
+            {
+                write_number_with_ubjson_prefix(j.m_value.number_integer, add_prefix);
+                break;
+            }
+
+            case value_t::number_unsigned:
+            {
+                write_number_with_ubjson_prefix(j.m_value.number_unsigned, add_prefix);
+                break;
+            }
+
+            case value_t::number_float:
+            {
+                write_number_with_ubjson_prefix(j.m_value.number_float, add_prefix);
+                break;
+            }
+
+            case value_t::string:
+            {
+                if (add_prefix)
+                {
+                    oa->write_character(to_char_type('S'));
+                }
+                write_number_with_ubjson_prefix(j.m_value.string->size(), true);
+                oa->write_characters(
+                    reinterpret_cast<const CharType*>(j.m_value.string->c_str()),
+                    j.m_value.string->size());
+                break;
+            }
+
+            case value_t::array:
+            {
+                if (add_prefix)
+                {
+                    oa->write_character(to_char_type('['));
+                }
+
+                bool prefix_required = true;
+                if (use_type && !j.m_value.array->empty())
+                {
+                    JSON_ASSERT(use_count);
+                    const CharType first_prefix = ubjson_prefix(j.front());
+                    const bool same_prefix = std::all_of(j.begin() + 1, j.end(),
+                                                         [this, first_prefix](const BasicJsonType & v)
+                    {
+                        return ubjson_prefix(v) == first_prefix;
+                    });
+
+                    if (same_prefix)
+                    {
+                        prefix_required = false;
+                        oa->write_character(to_char_type('$'));
+                        oa->write_character(first_prefix);
+                    }
+                }
+
+                if (use_count)
+                {
+                    oa->write_character(to_char_type('#'));
+                    write_number_with_ubjson_prefix(j.m_value.array->size(), true);
+                }
+
+                for (const auto& el : *j.m_value.array)
+                {
+                    write_ubjson(el, use_count, use_type, prefix_required);
+                }
+
+                if (!use_count)
+                {
+                    oa->write_character(to_char_type(']'));
+                }
+
+                break;
+            }
+
+            case value_t::binary:
+            {
+                if (add_prefix)
+                {
+                    oa->write_character(to_char_type('['));
+                }
+
+                if (use_type && !j.m_value.binary->empty())
+                {
+                    JSON_ASSERT(use_count);
+                    oa->write_character(to_char_type('$'));
+                    oa->write_character('U');
+                }
+
+                if (use_count)
+                {
+                    oa->write_character(to_char_type('#'));
+                    write_number_with_ubjson_prefix(j.m_value.binary->size(), true);
+                }
+
+                if (use_type)
+                {
+                    oa->write_characters(
+                        reinterpret_cast<const CharType*>(j.m_value.binary->data()),
+                        j.m_value.binary->size());
+                }
+                else
+                {
+                    for (size_t i = 0; i < j.m_value.binary->size(); ++i)
+                    {
+                        oa->write_character(to_char_type('U'));
+                        oa->write_character(j.m_value.binary->data()[i]);
+                    }
+                }
+
+                if (!use_count)
+                {
+                    oa->write_character(to_char_type(']'));
+                }
+
+                break;
+            }
+
+            case value_t::object:
+            {
+                if (add_prefix)
+                {
+                    oa->write_character(to_char_type('{'));
+                }
+
+                bool prefix_required = true;
+                if (use_type && !j.m_value.object->empty())
+                {
+                    JSON_ASSERT(use_count);
+                    const CharType first_prefix = ubjson_prefix(j.front());
+                    const bool same_prefix = std::all_of(j.begin(), j.end(),
+                                                         [this, first_prefix](const BasicJsonType & v)
+                    {
+                        return ubjson_prefix(v) == first_prefix;
+                    });
+
+                    if (same_prefix)
+                    {
+                        prefix_required = false;
+                        oa->write_character(to_char_type('$'));
+                        oa->write_character(first_prefix);
+                    }
+                }
+
+                if (use_count)
+                {
+                    oa->write_character(to_char_type('#'));
+                    write_number_with_ubjson_prefix(j.m_value.object->size(), true);
+                }
+
+                for (const auto& el : *j.m_value.object)
+                {
+                    write_number_with_ubjson_prefix(el.first.size(), true);
+                    oa->write_characters(
+                        reinterpret_cast<const CharType*>(el.first.c_str()),
+                        el.first.size());
+                    write_ubjson(el.second, use_count, use_type, prefix_required);
+                }
+
+                if (!use_count)
+                {
+                    oa->write_character(to_char_type('}'));
+                }
+
+                break;
+            }
+
+            case value_t::discarded:
+            default:
+                break;
+        }
+    }
+
+  private:
+    //////////
+    // BSON //
+    //////////
+
+    /*!
+    @return The size of a BSON document entry header, including the id marker
+            and the entry name size (and its null-terminator).
+    */
+    static std::size_t calc_bson_entry_header_size(const string_t& name, const BasicJsonType& j)
+    {
+        const auto it = name.find(static_cast<typename string_t::value_type>(0));
+        if (JSON_HEDLEY_UNLIKELY(it != BasicJsonType::string_t::npos))
+        {
+            JSON_THROW(out_of_range::create(409, "BSON key cannot contain code point U+0000 (at byte " + std::to_string(it) + ")", j));
+            static_cast<void>(j);
+        }
+
+        return /*id*/ 1ul + name.size() + /*zero-terminator*/1u;
+    }
+
+    /*!
+    @brief Writes the given @a element_type and @a name to the output adapter
+    */
+    void write_bson_entry_header(const string_t& name,
+                                 const std::uint8_t element_type)
+    {
+        oa->write_character(to_char_type(element_type)); // boolean
+        oa->write_characters(
+            reinterpret_cast<const CharType*>(name.c_str()),
+            name.size() + 1u);
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and boolean value @a value
+    */
+    void write_bson_boolean(const string_t& name,
+                            const bool value)
+    {
+        write_bson_entry_header(name, 0x08);
+        oa->write_character(value ? to_char_type(0x01) : to_char_type(0x00));
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and double value @a value
+    */
+    void write_bson_double(const string_t& name,
+                           const double value)
+    {
+        write_bson_entry_header(name, 0x01);
+        write_number<double, true>(value);
+    }
+
+    /*!
+    @return The size of the BSON-encoded string in @a value
+    */
+    static std::size_t calc_bson_string_size(const string_t& value)
+    {
+        return sizeof(std::int32_t) + value.size() + 1ul;
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and string value @a value
+    */
+    void write_bson_string(const string_t& name,
+                           const string_t& value)
+    {
+        write_bson_entry_header(name, 0x02);
+
+        write_number<std::int32_t, true>(static_cast<std::int32_t>(value.size() + 1ul));
+        oa->write_characters(
+            reinterpret_cast<const CharType*>(value.c_str()),
+            value.size() + 1);
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and null value
+    */
+    void write_bson_null(const string_t& name)
+    {
+        write_bson_entry_header(name, 0x0A);
+    }
+
+    /*!
+    @return The size of the BSON-encoded integer @a value
+    */
+    static std::size_t calc_bson_integer_size(const std::int64_t value)
+    {
+        return (std::numeric_limits<std::int32_t>::min)() <= value && value <= (std::numeric_limits<std::int32_t>::max)()
+               ? sizeof(std::int32_t)
+               : sizeof(std::int64_t);
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and integer @a value
+    */
+    void write_bson_integer(const string_t& name,
+                            const std::int64_t value)
+    {
+        if ((std::numeric_limits<std::int32_t>::min)() <= value && value <= (std::numeric_limits<std::int32_t>::max)())
+        {
+            write_bson_entry_header(name, 0x10); // int32
+            write_number<std::int32_t, true>(static_cast<std::int32_t>(value));
+        }
+        else
+        {
+            write_bson_entry_header(name, 0x12); // int64
+            write_number<std::int64_t, true>(static_cast<std::int64_t>(value));
+        }
+    }
+
+    /*!
+    @return The size of the BSON-encoded unsigned integer in @a j
+    */
+    static constexpr std::size_t calc_bson_unsigned_size(const std::uint64_t value) noexcept
+    {
+        return (value <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+               ? sizeof(std::int32_t)
+               : sizeof(std::int64_t);
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and unsigned @a value
+    */
+    void write_bson_unsigned(const string_t& name,
+                             const BasicJsonType& j)
+    {
+        if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+        {
+            write_bson_entry_header(name, 0x10 /* int32 */);
+            write_number<std::int32_t, true>(static_cast<std::int32_t>(j.m_value.number_unsigned));
+        }
+        else if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int64_t>::max)()))
+        {
+            write_bson_entry_header(name, 0x12 /* int64 */);
+            write_number<std::int64_t, true>(static_cast<std::int64_t>(j.m_value.number_unsigned));
+        }
+        else
+        {
+            JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(j.m_value.number_unsigned) + " cannot be represented by BSON as it does not fit int64", j));
+        }
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and object @a value
+    */
+    void write_bson_object_entry(const string_t& name,
+                                 const typename BasicJsonType::object_t& value)
+    {
+        write_bson_entry_header(name, 0x03); // object
+        write_bson_object(value);
+    }
+
+    /*!
+    @return The size of the BSON-encoded array @a value
+    */
+    static std::size_t calc_bson_array_size(const typename BasicJsonType::array_t& value)
+    {
+        std::size_t array_index = 0ul;
+
+        const std::size_t embedded_document_size = std::accumulate(std::begin(value), std::end(value), std::size_t(0), [&array_index](std::size_t result, const typename BasicJsonType::array_t::value_type & el)
+        {
+            return result + calc_bson_element_size(std::to_string(array_index++), el);
+        });
+
+        return sizeof(std::int32_t) + embedded_document_size + 1ul;
+    }
+
+    /*!
+    @return The size of the BSON-encoded binary array @a value
+    */
+    static std::size_t calc_bson_binary_size(const typename BasicJsonType::binary_t& value)
+    {
+        return sizeof(std::int32_t) + value.size() + 1ul;
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and array @a value
+    */
+    void write_bson_array(const string_t& name,
+                          const typename BasicJsonType::array_t& value)
+    {
+        write_bson_entry_header(name, 0x04); // array
+        write_number<std::int32_t, true>(static_cast<std::int32_t>(calc_bson_array_size(value)));
+
+        std::size_t array_index = 0ul;
+
+        for (const auto& el : value)
+        {
+            write_bson_element(std::to_string(array_index++), el);
+        }
+
+        oa->write_character(to_char_type(0x00));
+    }
+
+    /*!
+    @brief Writes a BSON element with key @a name and binary value @a value
+    */
+    void write_bson_binary(const string_t& name,
+                           const binary_t& value)
+    {
+        write_bson_entry_header(name, 0x05);
+
+        write_number<std::int32_t, true>(static_cast<std::int32_t>(value.size()));
+        write_number(value.has_subtype() ? static_cast<std::uint8_t>(value.subtype()) : std::uint8_t(0x00));
+
+        oa->write_characters(reinterpret_cast<const CharType*>(value.data()), value.size());
+    }
+
+    /*!
+    @brief Calculates the size necessary to serialize the JSON value @a j with its @a name
+    @return The calculated size for the BSON document entry for @a j with the given @a name.
+    */
+    static std::size_t calc_bson_element_size(const string_t& name,
+            const BasicJsonType& j)
+    {
+        const auto header_size = calc_bson_entry_header_size(name, j);
+        switch (j.type())
+        {
+            case value_t::object:
+                return header_size + calc_bson_object_size(*j.m_value.object);
+
+            case value_t::array:
+                return header_size + calc_bson_array_size(*j.m_value.array);
+
+            case value_t::binary:
+                return header_size + calc_bson_binary_size(*j.m_value.binary);
+
+            case value_t::boolean:
+                return header_size + 1ul;
+
+            case value_t::number_float:
+                return header_size + 8ul;
+
+            case value_t::number_integer:
+                return header_size + calc_bson_integer_size(j.m_value.number_integer);
+
+            case value_t::number_unsigned:
+                return header_size + calc_bson_unsigned_size(j.m_value.number_unsigned);
+
+            case value_t::string:
+                return header_size + calc_bson_string_size(*j.m_value.string);
+
+            case value_t::null:
+                return header_size + 0ul;
+
+            // LCOV_EXCL_START
+            case value_t::discarded:
+            default:
+                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert)
+                return 0ul;
+                // LCOV_EXCL_STOP
+        }
+    }
+
+    /*!
+    @brief Serializes the JSON value @a j to BSON and associates it with the
+           key @a name.
+    @param name The name to associate with the JSON entity @a j within the
+                current BSON document
+    */
+    void write_bson_element(const string_t& name,
+                            const BasicJsonType& j)
+    {
+        switch (j.type())
+        {
+            case value_t::object:
+                return write_bson_object_entry(name, *j.m_value.object);
+
+            case value_t::array:
+                return write_bson_array(name, *j.m_value.array);
+
+            case value_t::binary:
+                return write_bson_binary(name, *j.m_value.binary);
+
+            case value_t::boolean:
+                return write_bson_boolean(name, j.m_value.boolean);
+
+            case value_t::number_float:
+                return write_bson_double(name, j.m_value.number_float);
+
+            case value_t::number_integer:
+                return write_bson_integer(name, j.m_value.number_integer);
+
+            case value_t::number_unsigned:
+                return write_bson_unsigned(name, j);
+
+            case value_t::string:
+                return write_bson_string(name, *j.m_value.string);
+
+            case value_t::null:
+                return write_bson_null(name);
+
+            // LCOV_EXCL_START
+            case value_t::discarded:
+            default:
+                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert)
+                return;
+                // LCOV_EXCL_STOP
+        }
+    }
+
+    /*!
+    @brief Calculates the size of the BSON serialization of the given
+           JSON-object @a j.
+    @param[in] value  JSON value to serialize
+    @pre       value.type() == value_t::object
+    */
+    static std::size_t calc_bson_object_size(const typename BasicJsonType::object_t& value)
+    {
+        std::size_t document_size = std::accumulate(value.begin(), value.end(), std::size_t(0),
+                                    [](size_t result, const typename BasicJsonType::object_t::value_type & el)
+        {
+            return result += calc_bson_element_size(el.first, el.second);
+        });
+
+        return sizeof(std::int32_t) + document_size + 1ul;
+    }
+
+    /*!
+    @param[in] value  JSON value to serialize
+    @pre       value.type() == value_t::object
+    */
+    void write_bson_object(const typename BasicJsonType::object_t& value)
+    {
+        write_number<std::int32_t, true>(static_cast<std::int32_t>(calc_bson_object_size(value)));
+
+        for (const auto& el : value)
+        {
+            write_bson_element(el.first, el.second);
+        }
+
+        oa->write_character(to_char_type(0x00));
+    }
+
+    //////////
+    // CBOR //
+    //////////
+
+    static constexpr CharType get_cbor_float_prefix(float /*unused*/)
+    {
+        return to_char_type(0xFA);  // Single-Precision Float
+    }
+
+    static constexpr CharType get_cbor_float_prefix(double /*unused*/)
+    {
+        return to_char_type(0xFB);  // Double-Precision Float
+    }
+
+    /////////////
+    // MsgPack //
+    /////////////
+
+    static constexpr CharType get_msgpack_float_prefix(float /*unused*/)
+    {
+        return to_char_type(0xCA);  // float 32
+    }
+
+    static constexpr CharType get_msgpack_float_prefix(double /*unused*/)
+    {
+        return to_char_type(0xCB);  // float 64
+    }
+
+    ////////////
+    // UBJSON //
+    ////////////
+
+    // UBJSON: write number (floating point)
+    template<typename NumberType, typename std::enable_if<
+                 std::is_floating_point<NumberType>::value, int>::type = 0>
+    void write_number_with_ubjson_prefix(const NumberType n,
+                                         const bool add_prefix)
+    {
+        if (add_prefix)
+        {
+            oa->write_character(get_ubjson_float_prefix(n));
+        }
+        write_number(n);
+    }
+
+    // UBJSON: write number (unsigned integer)
+    template<typename NumberType, typename std::enable_if<
+                 std::is_unsigned<NumberType>::value, int>::type = 0>
+    void write_number_with_ubjson_prefix(const NumberType n,
+                                         const bool add_prefix)
+    {
+        if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int8_t>::max)()))
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('i'));  // int8
+            }
+            write_number(static_cast<std::uint8_t>(n));
+        }
+        else if (n <= (std::numeric_limits<std::uint8_t>::max)())
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('U'));  // uint8
+            }
+            write_number(static_cast<std::uint8_t>(n));
+        }
+        else if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int16_t>::max)()))
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('I'));  // int16
+            }
+            write_number(static_cast<std::int16_t>(n));
+        }
+        else if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('l'));  // int32
+            }
+            write_number(static_cast<std::int32_t>(n));
+        }
+        else if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int64_t>::max)()))
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('L'));  // int64
+            }
+            write_number(static_cast<std::int64_t>(n));
+        }
+        else
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('H'));  // high-precision number
+            }
+
+            const auto number = BasicJsonType(n).dump();
+            write_number_with_ubjson_prefix(number.size(), true);
+            for (std::size_t i = 0; i < number.size(); ++i)
+            {
+                oa->write_character(to_char_type(static_cast<std::uint8_t>(number[i])));
+            }
+        }
+    }
+
+    // UBJSON: write number (signed integer)
+    template < typename NumberType, typename std::enable_if <
+                   std::is_signed<NumberType>::value&&
+                   !std::is_floating_point<NumberType>::value, int >::type = 0 >
+    void write_number_with_ubjson_prefix(const NumberType n,
+                                         const bool add_prefix)
+    {
+        if ((std::numeric_limits<std::int8_t>::min)() <= n && n <= (std::numeric_limits<std::int8_t>::max)())
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('i'));  // int8
+            }
+            write_number(static_cast<std::int8_t>(n));
+        }
+        else if (static_cast<std::int64_t>((std::numeric_limits<std::uint8_t>::min)()) <= n && n <= static_cast<std::int64_t>((std::numeric_limits<std::uint8_t>::max)()))
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('U'));  // uint8
+            }
+            write_number(static_cast<std::uint8_t>(n));
+        }
+        else if ((std::numeric_limits<std::int16_t>::min)() <= n && n <= (std::numeric_limits<std::int16_t>::max)())
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('I'));  // int16
+            }
+            write_number(static_cast<std::int16_t>(n));
+        }
+        else if ((std::numeric_limits<std::int32_t>::min)() <= n && n <= (std::numeric_limits<std::int32_t>::max)())
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('l'));  // int32
+            }
+            write_number(static_cast<std::int32_t>(n));
+        }
+        else if ((std::numeric_limits<std::int64_t>::min)() <= n && n <= (std::numeric_limits<std::int64_t>::max)())
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('L'));  // int64
+            }
+            write_number(static_cast<std::int64_t>(n));
+        }
+        // LCOV_EXCL_START
+        else
+        {
+            if (add_prefix)
+            {
+                oa->write_character(to_char_type('H'));  // high-precision number
+            }
+
+            const auto number = BasicJsonType(n).dump();
+            write_number_with_ubjson_prefix(number.size(), true);
+            for (std::size_t i = 0; i < number.size(); ++i)
+            {
+                oa->write_character(to_char_type(static_cast<std::uint8_t>(number[i])));
+            }
+        }
+        // LCOV_EXCL_STOP
+    }
+
+    /*!
+    @brief determine the type prefix of container values
+    */
+    CharType ubjson_prefix(const BasicJsonType& j) const noexcept
+    {
+        switch (j.type())
+        {
+            case value_t::null:
+                return 'Z';
+
+            case value_t::boolean:
+                return j.m_value.boolean ? 'T' : 'F';
+
+            case value_t::number_integer:
+            {
+                if ((std::numeric_limits<std::int8_t>::min)() <= j.m_value.number_integer && j.m_value.number_integer <= (std::numeric_limits<std::int8_t>::max)())
+                {
+                    return 'i';
+                }
+                if ((std::numeric_limits<std::uint8_t>::min)() <= j.m_value.number_integer && j.m_value.number_integer <= (std::numeric_limits<std::uint8_t>::max)())
+                {
+                    return 'U';
+                }
+                if ((std::numeric_limits<std::int16_t>::min)() <= j.m_value.number_integer && j.m_value.number_integer <= (std::numeric_limits<std::int16_t>::max)())
+                {
+                    return 'I';
+                }
+                if ((std::numeric_limits<std::int32_t>::min)() <= j.m_value.number_integer && j.m_value.number_integer <= (std::numeric_limits<std::int32_t>::max)())
+                {
+                    return 'l';
+                }
+                if ((std::numeric_limits<std::int64_t>::min)() <= j.m_value.number_integer && j.m_value.number_integer <= (std::numeric_limits<std::int64_t>::max)())
+                {
+                    return 'L';
+                }
+                // anything else is treated as high-precision number
+                return 'H'; // LCOV_EXCL_LINE
+            }
+
+            case value_t::number_unsigned:
+            {
+                if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int8_t>::max)()))
+                {
+                    return 'i';
+                }
+                if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::uint8_t>::max)()))
+                {
+                    return 'U';
+                }
+                if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int16_t>::max)()))
+                {
+                    return 'I';
+                }
+                if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+                {
+                    return 'l';
+                }
+                if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int64_t>::max)()))
+                {
+                    return 'L';
+                }
+                // anything else is treated as high-precision number
+                return 'H'; // LCOV_EXCL_LINE
+            }
+
+            case value_t::number_float:
+                return get_ubjson_float_prefix(j.m_value.number_float);
+
+            case value_t::string:
+                return 'S';
+
+            case value_t::array: // fallthrough
+            case value_t::binary:
+                return '[';
+
+            case value_t::object:
+                return '{';
+
+            case value_t::discarded:
+            default:  // discarded values
+                return 'N';
+        }
+    }
+
+    static constexpr CharType get_ubjson_float_prefix(float /*unused*/)
+    {
+        return 'd';  // float 32
+    }
+
+    static constexpr CharType get_ubjson_float_prefix(double /*unused*/)
+    {
+        return 'D';  // float 64
+    }
+
+    ///////////////////////
+    // Utility functions //
+    ///////////////////////
+
+    /*
+    @brief write a number to output input
+    @param[in] n number of type @a NumberType
+    @tparam NumberType the type of the number
+    @tparam OutputIsLittleEndian Set to true if output data is
+                                 required to be little endian
+
+    @note This function needs to respect the system's endianess, because bytes
+          in CBOR, MessagePack, and UBJSON are stored in network order (big
+          endian) and therefore need reordering on little endian systems.
+    */
+    template<typename NumberType, bool OutputIsLittleEndian = false>
+    void write_number(const NumberType n)
+    {
+        // step 1: write number to array of length NumberType
+        std::array<CharType, sizeof(NumberType)> vec{};
+        std::memcpy(vec.data(), &n, sizeof(NumberType));
+
+        // step 2: write array to output (with possible reordering)
+        if (is_little_endian != OutputIsLittleEndian)
+        {
+            // reverse byte order prior to conversion if necessary
+            std::reverse(vec.begin(), vec.end());
+        }
+
+        oa->write_characters(vec.data(), sizeof(NumberType));
+    }
+
+    void write_compact_float(const number_float_t n, detail::input_format_t format)
+    {
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
+        if (static_cast<double>(n) >= static_cast<double>(std::numeric_limits<float>::lowest()) &&
+                static_cast<double>(n) <= static_cast<double>((std::numeric_limits<float>::max)()) &&
+                static_cast<double>(static_cast<float>(n)) == static_cast<double>(n))
+        {
+            oa->write_character(format == detail::input_format_t::cbor
+                                ? get_cbor_float_prefix(static_cast<float>(n))
+                                : get_msgpack_float_prefix(static_cast<float>(n)));
+            write_number(static_cast<float>(n));
+        }
+        else
+        {
+            oa->write_character(format == detail::input_format_t::cbor
+                                ? get_cbor_float_prefix(n)
+                                : get_msgpack_float_prefix(n));
+            write_number(n);
+        }
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+    }
+
+  public:
+    // The following to_char_type functions are implement the conversion
+    // between uint8_t and CharType. In case CharType is not unsigned,
+    // such a conversion is required to allow values greater than 128.
+    // See <https://github.com/nlohmann/json/issues/1286> for a discussion.
+    template < typename C = CharType,
+               enable_if_t < std::is_signed<C>::value && std::is_signed<char>::value > * = nullptr >
+    static constexpr CharType to_char_type(std::uint8_t x) noexcept
+    {
+        return *reinterpret_cast<char*>(&x);
+    }
+
+    template < typename C = CharType,
+               enable_if_t < std::is_signed<C>::value && std::is_unsigned<char>::value > * = nullptr >
+    static CharType to_char_type(std::uint8_t x) noexcept
+    {
+        static_assert(sizeof(std::uint8_t) == sizeof(CharType), "size of CharType must be equal to std::uint8_t");
+        static_assert(std::is_trivial<CharType>::value, "CharType must be trivial");
+        CharType result;
+        std::memcpy(&result, &x, sizeof(x));
+        return result;
+    }
+
+    template<typename C = CharType,
+             enable_if_t<std::is_unsigned<C>::value>* = nullptr>
+    static constexpr CharType to_char_type(std::uint8_t x) noexcept
+    {
+        return x;
+    }
+
+    template < typename InputCharType, typename C = CharType,
+               enable_if_t <
+                   std::is_signed<C>::value &&
+                   std::is_signed<char>::value &&
+                   std::is_same<char, typename std::remove_cv<InputCharType>::type>::value
+                   > * = nullptr >
+    static constexpr CharType to_char_type(InputCharType x) noexcept
+    {
+        return x;
+    }
+
+  private:
+    /// whether we can assume little endianess
+    const bool is_little_endian = little_endianess();
+
+    /// the output
+    output_adapter_t<CharType> oa = nullptr;
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/output/output_adapters.hpp>
+
+// #include <nlohmann/detail/output/serializer.hpp>
+
+
+#include <algorithm> // reverse, remove, fill, find, none_of
+#include <array> // array
+#include <clocale> // localeconv, lconv
+#include <cmath> // labs, isfinite, isnan, signbit
+#include <cstddef> // size_t, ptrdiff_t
+#include <cstdint> // uint8_t
+#include <cstdio> // snprintf
+#include <limits> // numeric_limits
+#include <string> // string, char_traits
+#include <type_traits> // is_same
+#include <utility> // move
+
+// #include <nlohmann/detail/conversions/to_chars.hpp>
+
+
+#include <array> // array
+#include <cmath>   // signbit, isfinite
+#include <cstdint> // intN_t, uintN_t
+#include <cstring> // memcpy, memmove
+#include <limits> // numeric_limits
+#include <type_traits> // conditional
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+
+/*!
+@brief implements the Grisu2 algorithm for binary to decimal floating-point
+conversion.
+
+This implementation is a slightly modified version of the reference
+implementation which may be obtained from
+http://florian.loitsch.com/publications (bench.tar.gz).
+
+The code is distributed under the MIT license, Copyright (c) 2009 Florian Loitsch.
+
+For a detailed description of the algorithm see:
+
+[1] Loitsch, "Printing Floating-Point Numbers Quickly and Accurately with
+    Integers", Proceedings of the ACM SIGPLAN 2010 Conference on Programming
+    Language Design and Implementation, PLDI 2010
+[2] Burger, Dybvig, "Printing Floating-Point Numbers Quickly and Accurately",
+    Proceedings of the ACM SIGPLAN 1996 Conference on Programming Language
+    Design and Implementation, PLDI 1996
+*/
+namespace dtoa_impl
+{
+
+template<typename Target, typename Source>
+Target reinterpret_bits(const Source source)
+{
+    static_assert(sizeof(Target) == sizeof(Source), "size mismatch");
+
+    Target target;
+    std::memcpy(&target, &source, sizeof(Source));
+    return target;
+}
+
+struct diyfp // f * 2^e
+{
+    static constexpr int kPrecision = 64; // = q
+
+    std::uint64_t f = 0;
+    int e = 0;
+
+    constexpr diyfp(std::uint64_t f_, int e_) noexcept : f(f_), e(e_) {}
+
+    /*!
+    @brief returns x - y
+    @pre x.e == y.e and x.f >= y.f
+    */
+    static diyfp sub(const diyfp& x, const diyfp& y) noexcept
+    {
+        JSON_ASSERT(x.e == y.e);
+        JSON_ASSERT(x.f >= y.f);
+
+        return {x.f - y.f, x.e};
+    }
+
+    /*!
+    @brief returns x * y
+    @note The result is rounded. (Only the upper q bits are returned.)
+    */
+    static diyfp mul(const diyfp& x, const diyfp& y) noexcept
+    {
+        static_assert(kPrecision == 64, "internal error");
+
+        // Computes:
+        //  f = round((x.f * y.f) / 2^q)
+        //  e = x.e + y.e + q
+
+        // Emulate the 64-bit * 64-bit multiplication:
+        //
+        // p = u * v
+        //   = (u_lo + 2^32 u_hi) (v_lo + 2^32 v_hi)
+        //   = (u_lo v_lo         ) + 2^32 ((u_lo v_hi         ) + (u_hi v_lo         )) + 2^64 (u_hi v_hi         )
+        //   = (p0                ) + 2^32 ((p1                ) + (p2                )) + 2^64 (p3                )
+        //   = (p0_lo + 2^32 p0_hi) + 2^32 ((p1_lo + 2^32 p1_hi) + (p2_lo + 2^32 p2_hi)) + 2^64 (p3                )
+        //   = (p0_lo             ) + 2^32 (p0_hi + p1_lo + p2_lo                      ) + 2^64 (p1_hi + p2_hi + p3)
+        //   = (p0_lo             ) + 2^32 (Q                                          ) + 2^64 (H                 )
+        //   = (p0_lo             ) + 2^32 (Q_lo + 2^32 Q_hi                           ) + 2^64 (H                 )
+        //
+        // (Since Q might be larger than 2^32 - 1)
+        //
+        //   = (p0_lo + 2^32 Q_lo) + 2^64 (Q_hi + H)
+        //
+        // (Q_hi + H does not overflow a 64-bit int)
+        //
+        //   = p_lo + 2^64 p_hi
+
+        const std::uint64_t u_lo = x.f & 0xFFFFFFFFu;
+        const std::uint64_t u_hi = x.f >> 32u;
+        const std::uint64_t v_lo = y.f & 0xFFFFFFFFu;
+        const std::uint64_t v_hi = y.f >> 32u;
+
+        const std::uint64_t p0 = u_lo * v_lo;
+        const std::uint64_t p1 = u_lo * v_hi;
+        const std::uint64_t p2 = u_hi * v_lo;
+        const std::uint64_t p3 = u_hi * v_hi;
+
+        const std::uint64_t p0_hi = p0 >> 32u;
+        const std::uint64_t p1_lo = p1 & 0xFFFFFFFFu;
+        const std::uint64_t p1_hi = p1 >> 32u;
+        const std::uint64_t p2_lo = p2 & 0xFFFFFFFFu;
+        const std::uint64_t p2_hi = p2 >> 32u;
+
+        std::uint64_t Q = p0_hi + p1_lo + p2_lo;
+
+        // The full product might now be computed as
+        //
+        // p_hi = p3 + p2_hi + p1_hi + (Q >> 32)
+        // p_lo = p0_lo + (Q << 32)
+        //
+        // But in this particular case here, the full p_lo is not required.
+        // Effectively we only need to add the highest bit in p_lo to p_hi (and
+        // Q_hi + 1 does not overflow).
+
+        Q += std::uint64_t{1} << (64u - 32u - 1u); // round, ties up
+
+        const std::uint64_t h = p3 + p2_hi + p1_hi + (Q >> 32u);
+
+        return {h, x.e + y.e + 64};
+    }
+
+    /*!
+    @brief normalize x such that the significand is >= 2^(q-1)
+    @pre x.f != 0
+    */
+    static diyfp normalize(diyfp x) noexcept
+    {
+        JSON_ASSERT(x.f != 0);
+
+        while ((x.f >> 63u) == 0)
+        {
+            x.f <<= 1u;
+            x.e--;
+        }
+
+        return x;
+    }
+
+    /*!
+    @brief normalize x such that the result has the exponent E
+    @pre e >= x.e and the upper e - x.e bits of x.f must be zero.
+    */
+    static diyfp normalize_to(const diyfp& x, const int target_exponent) noexcept
+    {
+        const int delta = x.e - target_exponent;
+
+        JSON_ASSERT(delta >= 0);
+        JSON_ASSERT(((x.f << delta) >> delta) == x.f);
+
+        return {x.f << delta, target_exponent};
+    }
+};
+
+struct boundaries
+{
+    diyfp w;
+    diyfp minus;
+    diyfp plus;
+};
+
+/*!
+Compute the (normalized) diyfp representing the input number 'value' and its
+boundaries.
+
+@pre value must be finite and positive
+*/
+template<typename FloatType>
+boundaries compute_boundaries(FloatType value)
+{
+    JSON_ASSERT(std::isfinite(value));
+    JSON_ASSERT(value > 0);
+
+    // Convert the IEEE representation into a diyfp.
+    //
+    // If v is denormal:
+    //      value = 0.F * 2^(1 - bias) = (          F) * 2^(1 - bias - (p-1))
+    // If v is normalized:
+    //      value = 1.F * 2^(E - bias) = (2^(p-1) + F) * 2^(E - bias - (p-1))
+
+    static_assert(std::numeric_limits<FloatType>::is_iec559,
+                  "internal error: dtoa_short requires an IEEE-754 floating-point implementation");
+
+    constexpr int      kPrecision = std::numeric_limits<FloatType>::digits; // = p (includes the hidden bit)
+    constexpr int      kBias      = std::numeric_limits<FloatType>::max_exponent - 1 + (kPrecision - 1);
+    constexpr int      kMinExp    = 1 - kBias;
+    constexpr std::uint64_t kHiddenBit = std::uint64_t{1} << (kPrecision - 1); // = 2^(p-1)
+
+    using bits_type = typename std::conditional<kPrecision == 24, std::uint32_t, std::uint64_t >::type;
+
+    const auto bits = static_cast<std::uint64_t>(reinterpret_bits<bits_type>(value));
+    const std::uint64_t E = bits >> (kPrecision - 1);
+    const std::uint64_t F = bits & (kHiddenBit - 1);
+
+    const bool is_denormal = E == 0;
+    const diyfp v = is_denormal
+                    ? diyfp(F, kMinExp)
+                    : diyfp(F + kHiddenBit, static_cast<int>(E) - kBias);
+
+    // Compute the boundaries m- and m+ of the floating-point value
+    // v = f * 2^e.
+    //
+    // Determine v- and v+, the floating-point predecessor and successor if v,
+    // respectively.
+    //
+    //      v- = v - 2^e        if f != 2^(p-1) or e == e_min                (A)
+    //         = v - 2^(e-1)    if f == 2^(p-1) and e > e_min                (B)
+    //
+    //      v+ = v + 2^e
+    //
+    // Let m- = (v- + v) / 2 and m+ = (v + v+) / 2. All real numbers _strictly_
+    // between m- and m+ round to v, regardless of how the input rounding
+    // algorithm breaks ties.
+    //
+    //      ---+-------------+-------------+-------------+-------------+---  (A)
+    //         v-            m-            v             m+            v+
+    //
+    //      -----------------+------+------+-------------+-------------+---  (B)
+    //                       v-     m-     v             m+            v+
+
+    const bool lower_boundary_is_closer = F == 0 && E > 1;
+    const diyfp m_plus = diyfp(2 * v.f + 1, v.e - 1);
+    const diyfp m_minus = lower_boundary_is_closer
+                          ? diyfp(4 * v.f - 1, v.e - 2)  // (B)
+                          : diyfp(2 * v.f - 1, v.e - 1); // (A)
+
+    // Determine the normalized w+ = m+.
+    const diyfp w_plus = diyfp::normalize(m_plus);
+
+    // Determine w- = m- such that e_(w-) = e_(w+).
+    const diyfp w_minus = diyfp::normalize_to(m_minus, w_plus.e);
+
+    return {diyfp::normalize(v), w_minus, w_plus};
+}
+
+// Given normalized diyfp w, Grisu needs to find a (normalized) cached
+// power-of-ten c, such that the exponent of the product c * w = f * 2^e lies
+// within a certain range [alpha, gamma] (Definition 3.2 from [1])
+//
+//      alpha <= e = e_c + e_w + q <= gamma
+//
+// or
+//
+//      f_c * f_w * 2^alpha <= f_c 2^(e_c) * f_w 2^(e_w) * 2^q
+//                          <= f_c * f_w * 2^gamma
+//
+// Since c and w are normalized, i.e. 2^(q-1) <= f < 2^q, this implies
+//
+//      2^(q-1) * 2^(q-1) * 2^alpha <= c * w * 2^q < 2^q * 2^q * 2^gamma
+//
+// or
+//
+//      2^(q - 2 + alpha) <= c * w < 2^(q + gamma)
+//
+// The choice of (alpha,gamma) determines the size of the table and the form of
+// the digit generation procedure. Using (alpha,gamma)=(-60,-32) works out well
+// in practice:
+//
+// The idea is to cut the number c * w = f * 2^e into two parts, which can be
+// processed independently: An integral part p1, and a fractional part p2:
+//
+//      f * 2^e = ( (f div 2^-e) * 2^-e + (f mod 2^-e) ) * 2^e
+//              = (f div 2^-e) + (f mod 2^-e) * 2^e
+//              = p1 + p2 * 2^e
+//
+// The conversion of p1 into decimal form requires a series of divisions and
+// modulos by (a power of) 10. These operations are faster for 32-bit than for
+// 64-bit integers, so p1 should ideally fit into a 32-bit integer. This can be
+// achieved by choosing
+//
+//      -e >= 32   or   e <= -32 := gamma
+//
+// In order to convert the fractional part
+//
+//      p2 * 2^e = p2 / 2^-e = d[-1] / 10^1 + d[-2] / 10^2 + ...
+//
+// into decimal form, the fraction is repeatedly multiplied by 10 and the digits
+// d[-i] are extracted in order:
+//
+//      (10 * p2) div 2^-e = d[-1]
+//      (10 * p2) mod 2^-e = d[-2] / 10^1 + ...
+//
+// The multiplication by 10 must not overflow. It is sufficient to choose
+//
+//      10 * p2 < 16 * p2 = 2^4 * p2 <= 2^64.
+//
+// Since p2 = f mod 2^-e < 2^-e,
+//
+//      -e <= 60   or   e >= -60 := alpha
+
+constexpr int kAlpha = -60;
+constexpr int kGamma = -32;
+
+struct cached_power // c = f * 2^e ~= 10^k
+{
+    std::uint64_t f;
+    int e;
+    int k;
+};
+
+/*!
+For a normalized diyfp w = f * 2^e, this function returns a (normalized) cached
+power-of-ten c = f_c * 2^e_c, such that the exponent of the product w * c
+satisfies (Definition 3.2 from [1])
+
+     alpha <= e_c + e + q <= gamma.
+*/
+inline cached_power get_cached_power_for_binary_exponent(int e)
+{
+    // Now
+    //
+    //      alpha <= e_c + e + q <= gamma                                    (1)
+    //      ==> f_c * 2^alpha <= c * 2^e * 2^q
+    //
+    // and since the c's are normalized, 2^(q-1) <= f_c,
+    //
+    //      ==> 2^(q - 1 + alpha) <= c * 2^(e + q)
+    //      ==> 2^(alpha - e - 1) <= c
+    //
+    // If c were an exact power of ten, i.e. c = 10^k, one may determine k as
+    //
+    //      k = ceil( log_10( 2^(alpha - e - 1) ) )
+    //        = ceil( (alpha - e - 1) * log_10(2) )
+    //
+    // From the paper:
+    // "In theory the result of the procedure could be wrong since c is rounded,
+    //  and the computation itself is approximated [...]. In practice, however,
+    //  this simple function is sufficient."
+    //
+    // For IEEE double precision floating-point numbers converted into
+    // normalized diyfp's w = f * 2^e, with q = 64,
+    //
+    //      e >= -1022      (min IEEE exponent)
+    //           -52        (p - 1)
+    //           -52        (p - 1, possibly normalize denormal IEEE numbers)
+    //           -11        (normalize the diyfp)
+    //         = -1137
+    //
+    // and
+    //
+    //      e <= +1023      (max IEEE exponent)
+    //           -52        (p - 1)
+    //           -11        (normalize the diyfp)
+    //         = 960
+    //
+    // This binary exponent range [-1137,960] results in a decimal exponent
+    // range [-307,324]. One does not need to store a cached power for each
+    // k in this range. For each such k it suffices to find a cached power
+    // such that the exponent of the product lies in [alpha,gamma].
+    // This implies that the difference of the decimal exponents of adjacent
+    // table entries must be less than or equal to
+    //
+    //      floor( (gamma - alpha) * log_10(2) ) = 8.
+    //
+    // (A smaller distance gamma-alpha would require a larger table.)
+
+    // NB:
+    // Actually this function returns c, such that -60 <= e_c + e + 64 <= -34.
+
+    constexpr int kCachedPowersMinDecExp = -300;
+    constexpr int kCachedPowersDecStep = 8;
+
+    static constexpr std::array<cached_power, 79> kCachedPowers =
+    {
+        {
+            { 0xAB70FE17C79AC6CA, -1060, -300 },
+            { 0xFF77B1FCBEBCDC4F, -1034, -292 },
+            { 0xBE5691EF416BD60C, -1007, -284 },
+            { 0x8DD01FAD907FFC3C,  -980, -276 },
+            { 0xD3515C2831559A83,  -954, -268 },
+            { 0x9D71AC8FADA6C9B5,  -927, -260 },
+            { 0xEA9C227723EE8BCB,  -901, -252 },
+            { 0xAECC49914078536D,  -874, -244 },
+            { 0x823C12795DB6CE57,  -847, -236 },
+            { 0xC21094364DFB5637,  -821, -228 },
+            { 0x9096EA6F3848984F,  -794, -220 },
+            { 0xD77485CB25823AC7,  -768, -212 },
+            { 0xA086CFCD97BF97F4,  -741, -204 },
+            { 0xEF340A98172AACE5,  -715, -196 },
+            { 0xB23867FB2A35B28E,  -688, -188 },
+            { 0x84C8D4DFD2C63F3B,  -661, -180 },
+            { 0xC5DD44271AD3CDBA,  -635, -172 },
+            { 0x936B9FCEBB25C996,  -608, -164 },
+            { 0xDBAC6C247D62A584,  -582, -156 },
+            { 0xA3AB66580D5FDAF6,  -555, -148 },
+            { 0xF3E2F893DEC3F126,  -529, -140 },
+            { 0xB5B5ADA8AAFF80B8,  -502, -132 },
+            { 0x87625F056C7C4A8B,  -475, -124 },
+            { 0xC9BCFF6034C13053,  -449, -116 },
+            { 0x964E858C91BA2655,  -422, -108 },
+            { 0xDFF9772470297EBD,  -396, -100 },
+            { 0xA6DFBD9FB8E5B88F,  -369,  -92 },
+            { 0xF8A95FCF88747D94,  -343,  -84 },
+            { 0xB94470938FA89BCF,  -316,  -76 },
+            { 0x8A08F0F8BF0F156B,  -289,  -68 },
+            { 0xCDB02555653131B6,  -263,  -60 },
+            { 0x993FE2C6D07B7FAC,  -236,  -52 },
+            { 0xE45C10C42A2B3B06,  -210,  -44 },
+            { 0xAA242499697392D3,  -183,  -36 },
+            { 0xFD87B5F28300CA0E,  -157,  -28 },
+            { 0xBCE5086492111AEB,  -130,  -20 },
+            { 0x8CBCCC096F5088CC,  -103,  -12 },
+            { 0xD1B71758E219652C,   -77,   -4 },
+            { 0x9C40000000000000,   -50,    4 },
+            { 0xE8D4A51000000000,   -24,   12 },
+            { 0xAD78EBC5AC620000,     3,   20 },
+            { 0x813F3978F8940984,    30,   28 },
+            { 0xC097CE7BC90715B3,    56,   36 },
+            { 0x8F7E32CE7BEA5C70,    83,   44 },
+            { 0xD5D238A4ABE98068,   109,   52 },
+            { 0x9F4F2726179A2245,   136,   60 },
+            { 0xED63A231D4C4FB27,   162,   68 },
+            { 0xB0DE65388CC8ADA8,   189,   76 },
+            { 0x83C7088E1AAB65DB,   216,   84 },
+            { 0xC45D1DF942711D9A,   242,   92 },
+            { 0x924D692CA61BE758,   269,  100 },
+            { 0xDA01EE641A708DEA,   295,  108 },
+            { 0xA26DA3999AEF774A,   322,  116 },
+            { 0xF209787BB47D6B85,   348,  124 },
+            { 0xB454E4A179DD1877,   375,  132 },
+            { 0x865B86925B9BC5C2,   402,  140 },
+            { 0xC83553C5C8965D3D,   428,  148 },
+            { 0x952AB45CFA97A0B3,   455,  156 },
+            { 0xDE469FBD99A05FE3,   481,  164 },
+            { 0xA59BC234DB398C25,   508,  172 },
+            { 0xF6C69A72A3989F5C,   534,  180 },
+            { 0xB7DCBF5354E9BECE,   561,  188 },
+            { 0x88FCF317F22241E2,   588,  196 },
+            { 0xCC20CE9BD35C78A5,   614,  204 },
+            { 0x98165AF37B2153DF,   641,  212 },
+            { 0xE2A0B5DC971F303A,   667,  220 },
+            { 0xA8D9D1535CE3B396,   694,  228 },
+            { 0xFB9B7CD9A4A7443C,   720,  236 },
+            { 0xBB764C4CA7A44410,   747,  244 },
+            { 0x8BAB8EEFB6409C1A,   774,  252 },
+            { 0xD01FEF10A657842C,   800,  260 },
+            { 0x9B10A4E5E9913129,   827,  268 },
+            { 0xE7109BFBA19C0C9D,   853,  276 },
+            { 0xAC2820D9623BF429,   880,  284 },
+            { 0x80444B5E7AA7CF85,   907,  292 },
+            { 0xBF21E44003ACDD2D,   933,  300 },
+            { 0x8E679C2F5E44FF8F,   960,  308 },
+            { 0xD433179D9C8CB841,   986,  316 },
+            { 0x9E19DB92B4E31BA9,  1013,  324 },
+        }
+    };
+
+    // This computation gives exactly the same results for k as
+    //      k = ceil((kAlpha - e - 1) * 0.30102999566398114)
+    // for |e| <= 1500, but doesn't require floating-point operations.
+    // NB: log_10(2) ~= 78913 / 2^18
+    JSON_ASSERT(e >= -1500);
+    JSON_ASSERT(e <=  1500);
+    const int f = kAlpha - e - 1;
+    const int k = (f * 78913) / (1 << 18) + static_cast<int>(f > 0);
+
+    const int index = (-kCachedPowersMinDecExp + k + (kCachedPowersDecStep - 1)) / kCachedPowersDecStep;
+    JSON_ASSERT(index >= 0);
+    JSON_ASSERT(static_cast<std::size_t>(index) < kCachedPowers.size());
+
+    const cached_power cached = kCachedPowers[static_cast<std::size_t>(index)];
+    JSON_ASSERT(kAlpha <= cached.e + e + 64);
+    JSON_ASSERT(kGamma >= cached.e + e + 64);
+
+    return cached;
+}
+
+/*!
+For n != 0, returns k, such that pow10 := 10^(k-1) <= n < 10^k.
+For n == 0, returns 1 and sets pow10 := 1.
+*/
+inline int find_largest_pow10(const std::uint32_t n, std::uint32_t& pow10)
+{
+    // LCOV_EXCL_START
+    if (n >= 1000000000)
+    {
+        pow10 = 1000000000;
+        return 10;
+    }
+    // LCOV_EXCL_STOP
+    if (n >= 100000000)
+    {
+        pow10 = 100000000;
+        return  9;
+    }
+    if (n >= 10000000)
+    {
+        pow10 = 10000000;
+        return  8;
+    }
+    if (n >= 1000000)
+    {
+        pow10 = 1000000;
+        return  7;
+    }
+    if (n >= 100000)
+    {
+        pow10 = 100000;
+        return  6;
+    }
+    if (n >= 10000)
+    {
+        pow10 = 10000;
+        return  5;
+    }
+    if (n >= 1000)
+    {
+        pow10 = 1000;
+        return  4;
+    }
+    if (n >= 100)
+    {
+        pow10 = 100;
+        return  3;
+    }
+    if (n >= 10)
+    {
+        pow10 = 10;
+        return  2;
+    }
+
+    pow10 = 1;
+    return 1;
+}
+
+inline void grisu2_round(char* buf, int len, std::uint64_t dist, std::uint64_t delta,
+                         std::uint64_t rest, std::uint64_t ten_k)
+{
+    JSON_ASSERT(len >= 1);
+    JSON_ASSERT(dist <= delta);
+    JSON_ASSERT(rest <= delta);
+    JSON_ASSERT(ten_k > 0);
+
+    //               <--------------------------- delta ---->
+    //                                  <---- dist --------->
+    // --------------[------------------+-------------------]--------------
+    //               M-                 w                   M+
+    //
+    //                                  ten_k
+    //                                <------>
+    //                                       <---- rest ---->
+    // --------------[------------------+----+--------------]--------------
+    //                                  w    V
+    //                                       = buf * 10^k
+    //
+    // ten_k represents a unit-in-the-last-place in the decimal representation
+    // stored in buf.
+    // Decrement buf by ten_k while this takes buf closer to w.
+
+    // The tests are written in this order to avoid overflow in unsigned
+    // integer arithmetic.
+
+    while (rest < dist
+            && delta - rest >= ten_k
+            && (rest + ten_k < dist || dist - rest > rest + ten_k - dist))
+    {
+        JSON_ASSERT(buf[len - 1] != '0');
+        buf[len - 1]--;
+        rest += ten_k;
+    }
+}
+
+/*!
+Generates V = buffer * 10^decimal_exponent, such that M- <= V <= M+.
+M- and M+ must be normalized and share the same exponent -60 <= e <= -32.
+*/
+inline void grisu2_digit_gen(char* buffer, int& length, int& decimal_exponent,
+                             diyfp M_minus, diyfp w, diyfp M_plus)
+{
+    static_assert(kAlpha >= -60, "internal error");
+    static_assert(kGamma <= -32, "internal error");
+
+    // Generates the digits (and the exponent) of a decimal floating-point
+    // number V = buffer * 10^decimal_exponent in the range [M-, M+]. The diyfp's
+    // w, M- and M+ share the same exponent e, which satisfies alpha <= e <= gamma.
+    //
+    //               <--------------------------- delta ---->
+    //                                  <---- dist --------->
+    // --------------[------------------+-------------------]--------------
+    //               M-                 w                   M+
+    //
+    // Grisu2 generates the digits of M+ from left to right and stops as soon as
+    // V is in [M-,M+].
+
+    JSON_ASSERT(M_plus.e >= kAlpha);
+    JSON_ASSERT(M_plus.e <= kGamma);
+
+    std::uint64_t delta = diyfp::sub(M_plus, M_minus).f; // (significand of (M+ - M-), implicit exponent is e)
+    std::uint64_t dist  = diyfp::sub(M_plus, w      ).f; // (significand of (M+ - w ), implicit exponent is e)
+
+    // Split M+ = f * 2^e into two parts p1 and p2 (note: e < 0):
+    //
+    //      M+ = f * 2^e
+    //         = ((f div 2^-e) * 2^-e + (f mod 2^-e)) * 2^e
+    //         = ((p1        ) * 2^-e + (p2        )) * 2^e
+    //         = p1 + p2 * 2^e
+
+    const diyfp one(std::uint64_t{1} << -M_plus.e, M_plus.e);
+
+    auto p1 = static_cast<std::uint32_t>(M_plus.f >> -one.e); // p1 = f div 2^-e (Since -e >= 32, p1 fits into a 32-bit int.)
+    std::uint64_t p2 = M_plus.f & (one.f - 1);                    // p2 = f mod 2^-e
+
+    // 1)
+    //
+    // Generate the digits of the integral part p1 = d[n-1]...d[1]d[0]
+
+    JSON_ASSERT(p1 > 0);
+
+    std::uint32_t pow10{};
+    const int k = find_largest_pow10(p1, pow10);
+
+    //      10^(k-1) <= p1 < 10^k, pow10 = 10^(k-1)
+    //
+    //      p1 = (p1 div 10^(k-1)) * 10^(k-1) + (p1 mod 10^(k-1))
+    //         = (d[k-1]         ) * 10^(k-1) + (p1 mod 10^(k-1))
+    //
+    //      M+ = p1                                             + p2 * 2^e
+    //         = d[k-1] * 10^(k-1) + (p1 mod 10^(k-1))          + p2 * 2^e
+    //         = d[k-1] * 10^(k-1) + ((p1 mod 10^(k-1)) * 2^-e + p2) * 2^e
+    //         = d[k-1] * 10^(k-1) + (                         rest) * 2^e
+    //
+    // Now generate the digits d[n] of p1 from left to right (n = k-1,...,0)
+    //
+    //      p1 = d[k-1]...d[n] * 10^n + d[n-1]...d[0]
+    //
+    // but stop as soon as
+    //
+    //      rest * 2^e = (d[n-1]...d[0] * 2^-e + p2) * 2^e <= delta * 2^e
+
+    int n = k;
+    while (n > 0)
+    {
+        // Invariants:
+        //      M+ = buffer * 10^n + (p1 + p2 * 2^e)    (buffer = 0 for n = k)
+        //      pow10 = 10^(n-1) <= p1 < 10^n
+        //
+        const std::uint32_t d = p1 / pow10;  // d = p1 div 10^(n-1)
+        const std::uint32_t r = p1 % pow10;  // r = p1 mod 10^(n-1)
+        //
+        //      M+ = buffer * 10^n + (d * 10^(n-1) + r) + p2 * 2^e
+        //         = (buffer * 10 + d) * 10^(n-1) + (r + p2 * 2^e)
+        //
+        JSON_ASSERT(d <= 9);
+        buffer[length++] = static_cast<char>('0' + d); // buffer := buffer * 10 + d
+        //
+        //      M+ = buffer * 10^(n-1) + (r + p2 * 2^e)
+        //
+        p1 = r;
+        n--;
+        //
+        //      M+ = buffer * 10^n + (p1 + p2 * 2^e)
+        //      pow10 = 10^n
+        //
+
+        // Now check if enough digits have been generated.
+        // Compute
+        //
+        //      p1 + p2 * 2^e = (p1 * 2^-e + p2) * 2^e = rest * 2^e
+        //
+        // Note:
+        // Since rest and delta share the same exponent e, it suffices to
+        // compare the significands.
+        const std::uint64_t rest = (std::uint64_t{p1} << -one.e) + p2;
+        if (rest <= delta)
+        {
+            // V = buffer * 10^n, with M- <= V <= M+.
+
+            decimal_exponent += n;
+
+            // We may now just stop. But instead look if the buffer could be
+            // decremented to bring V closer to w.
+            //
+            // pow10 = 10^n is now 1 ulp in the decimal representation V.
+            // The rounding procedure works with diyfp's with an implicit
+            // exponent of e.
+            //
+            //      10^n = (10^n * 2^-e) * 2^e = ulp * 2^e
+            //
+            const std::uint64_t ten_n = std::uint64_t{pow10} << -one.e;
+            grisu2_round(buffer, length, dist, delta, rest, ten_n);
+
+            return;
+        }
+
+        pow10 /= 10;
+        //
+        //      pow10 = 10^(n-1) <= p1 < 10^n
+        // Invariants restored.
+    }
+
+    // 2)
+    //
+    // The digits of the integral part have been generated:
+    //
+    //      M+ = d[k-1]...d[1]d[0] + p2 * 2^e
+    //         = buffer            + p2 * 2^e
+    //
+    // Now generate the digits of the fractional part p2 * 2^e.
+    //
+    // Note:
+    // No decimal point is generated: the exponent is adjusted instead.
+    //
+    // p2 actually represents the fraction
+    //
+    //      p2 * 2^e
+    //          = p2 / 2^-e
+    //          = d[-1] / 10^1 + d[-2] / 10^2 + ...
+    //
+    // Now generate the digits d[-m] of p1 from left to right (m = 1,2,...)
+    //
+    //      p2 * 2^e = d[-1]d[-2]...d[-m] * 10^-m
+    //                      + 10^-m * (d[-m-1] / 10^1 + d[-m-2] / 10^2 + ...)
+    //
+    // using
+    //
+    //      10^m * p2 = ((10^m * p2) div 2^-e) * 2^-e + ((10^m * p2) mod 2^-e)
+    //                = (                   d) * 2^-e + (                   r)
+    //
+    // or
+    //      10^m * p2 * 2^e = d + r * 2^e
+    //
+    // i.e.
+    //
+    //      M+ = buffer + p2 * 2^e
+    //         = buffer + 10^-m * (d + r * 2^e)
+    //         = (buffer * 10^m + d) * 10^-m + 10^-m * r * 2^e
+    //
+    // and stop as soon as 10^-m * r * 2^e <= delta * 2^e
+
+    JSON_ASSERT(p2 > delta);
+
+    int m = 0;
+    for (;;)
+    {
+        // Invariant:
+        //      M+ = buffer * 10^-m + 10^-m * (d[-m-1] / 10 + d[-m-2] / 10^2 + ...) * 2^e
+        //         = buffer * 10^-m + 10^-m * (p2                                 ) * 2^e
+        //         = buffer * 10^-m + 10^-m * (1/10 * (10 * p2)                   ) * 2^e
+        //         = buffer * 10^-m + 10^-m * (1/10 * ((10*p2 div 2^-e) * 2^-e + (10*p2 mod 2^-e)) * 2^e
+        //
+        JSON_ASSERT(p2 <= (std::numeric_limits<std::uint64_t>::max)() / 10);
+        p2 *= 10;
+        const std::uint64_t d = p2 >> -one.e;     // d = (10 * p2) div 2^-e
+        const std::uint64_t r = p2 & (one.f - 1); // r = (10 * p2) mod 2^-e
+        //
+        //      M+ = buffer * 10^-m + 10^-m * (1/10 * (d * 2^-e + r) * 2^e
+        //         = buffer * 10^-m + 10^-m * (1/10 * (d + r * 2^e))
+        //         = (buffer * 10 + d) * 10^(-m-1) + 10^(-m-1) * r * 2^e
+        //
+        JSON_ASSERT(d <= 9);
+        buffer[length++] = static_cast<char>('0' + d); // buffer := buffer * 10 + d
+        //
+        //      M+ = buffer * 10^(-m-1) + 10^(-m-1) * r * 2^e
+        //
+        p2 = r;
+        m++;
+        //
+        //      M+ = buffer * 10^-m + 10^-m * p2 * 2^e
+        // Invariant restored.
+
+        // Check if enough digits have been generated.
+        //
+        //      10^-m * p2 * 2^e <= delta * 2^e
+        //              p2 * 2^e <= 10^m * delta * 2^e
+        //                    p2 <= 10^m * delta
+        delta *= 10;
+        dist  *= 10;
+        if (p2 <= delta)
+        {
+            break;
+        }
+    }
+
+    // V = buffer * 10^-m, with M- <= V <= M+.
+
+    decimal_exponent -= m;
+
+    // 1 ulp in the decimal representation is now 10^-m.
+    // Since delta and dist are now scaled by 10^m, we need to do the
+    // same with ulp in order to keep the units in sync.
+    //
+    //      10^m * 10^-m = 1 = 2^-e * 2^e = ten_m * 2^e
+    //
+    const std::uint64_t ten_m = one.f;
+    grisu2_round(buffer, length, dist, delta, p2, ten_m);
+
+    // By construction this algorithm generates the shortest possible decimal
+    // number (Loitsch, Theorem 6.2) which rounds back to w.
+    // For an input number of precision p, at least
+    //
+    //      N = 1 + ceil(p * log_10(2))
+    //
+    // decimal digits are sufficient to identify all binary floating-point
+    // numbers (Matula, "In-and-Out conversions").
+    // This implies that the algorithm does not produce more than N decimal
+    // digits.
+    //
+    //      N = 17 for p = 53 (IEEE double precision)
+    //      N = 9  for p = 24 (IEEE single precision)
+}
+
+/*!
+v = buf * 10^decimal_exponent
+len is the length of the buffer (number of decimal digits)
+The buffer must be large enough, i.e. >= max_digits10.
+*/
+JSON_HEDLEY_NON_NULL(1)
+inline void grisu2(char* buf, int& len, int& decimal_exponent,
+                   diyfp m_minus, diyfp v, diyfp m_plus)
+{
+    JSON_ASSERT(m_plus.e == m_minus.e);
+    JSON_ASSERT(m_plus.e == v.e);
+
+    //  --------(-----------------------+-----------------------)--------    (A)
+    //          m-                      v                       m+
+    //
+    //  --------------------(-----------+-----------------------)--------    (B)
+    //                      m-          v                       m+
+    //
+    // First scale v (and m- and m+) such that the exponent is in the range
+    // [alpha, gamma].
+
+    const cached_power cached = get_cached_power_for_binary_exponent(m_plus.e);
+
+    const diyfp c_minus_k(cached.f, cached.e); // = c ~= 10^-k
+
+    // The exponent of the products is = v.e + c_minus_k.e + q and is in the range [alpha,gamma]
+    const diyfp w       = diyfp::mul(v,       c_minus_k);
+    const diyfp w_minus = diyfp::mul(m_minus, c_minus_k);
+    const diyfp w_plus  = diyfp::mul(m_plus,  c_minus_k);
+
+    //  ----(---+---)---------------(---+---)---------------(---+---)----
+    //          w-                      w                       w+
+    //          = c*m-                  = c*v                   = c*m+
+    //
+    // diyfp::mul rounds its result and c_minus_k is approximated too. w, w- and
+    // w+ are now off by a small amount.
+    // In fact:
+    //
+    //      w - v * 10^k < 1 ulp
+    //
+    // To account for this inaccuracy, add resp. subtract 1 ulp.
+    //
+    //  --------+---[---------------(---+---)---------------]---+--------
+    //          w-  M-                  w                   M+  w+
+    //
+    // Now any number in [M-, M+] (bounds included) will round to w when input,
+    // regardless of how the input rounding algorithm breaks ties.
+    //
+    // And digit_gen generates the shortest possible such number in [M-, M+].
+    // Note that this does not mean that Grisu2 always generates the shortest
+    // possible number in the interval (m-, m+).
+    const diyfp M_minus(w_minus.f + 1, w_minus.e);
+    const diyfp M_plus (w_plus.f  - 1, w_plus.e );
+
+    decimal_exponent = -cached.k; // = -(-k) = k
+
+    grisu2_digit_gen(buf, len, decimal_exponent, M_minus, w, M_plus);
+}
+
+/*!
+v = buf * 10^decimal_exponent
+len is the length of the buffer (number of decimal digits)
+The buffer must be large enough, i.e. >= max_digits10.
+*/
+template<typename FloatType>
+JSON_HEDLEY_NON_NULL(1)
+void grisu2(char* buf, int& len, int& decimal_exponent, FloatType value)
+{
+    static_assert(diyfp::kPrecision >= std::numeric_limits<FloatType>::digits + 3,
+                  "internal error: not enough precision");
+
+    JSON_ASSERT(std::isfinite(value));
+    JSON_ASSERT(value > 0);
+
+    // If the neighbors (and boundaries) of 'value' are always computed for double-precision
+    // numbers, all float's can be recovered using strtod (and strtof). However, the resulting
+    // decimal representations are not exactly "short".
+    //
+    // The documentation for 'std::to_chars' (https://en.cppreference.com/w/cpp/utility/to_chars)
+    // says "value is converted to a string as if by std::sprintf in the default ("C") locale"
+    // and since sprintf promotes float's to double's, I think this is exactly what 'std::to_chars'
+    // does.
+    // On the other hand, the documentation for 'std::to_chars' requires that "parsing the
+    // representation using the corresponding std::from_chars function recovers value exactly". That
+    // indicates that single precision floating-point numbers should be recovered using
+    // 'std::strtof'.
+    //
+    // NB: If the neighbors are computed for single-precision numbers, there is a single float
+    //     (7.0385307e-26f) which can't be recovered using strtod. The resulting double precision
+    //     value is off by 1 ulp.
+#if 0
+    const boundaries w = compute_boundaries(static_cast<double>(value));
+#else
+    const boundaries w = compute_boundaries(value);
+#endif
+
+    grisu2(buf, len, decimal_exponent, w.minus, w.w, w.plus);
+}
+
+/*!
+@brief appends a decimal representation of e to buf
+@return a pointer to the element following the exponent.
+@pre -1000 < e < 1000
+*/
+JSON_HEDLEY_NON_NULL(1)
+JSON_HEDLEY_RETURNS_NON_NULL
+inline char* append_exponent(char* buf, int e)
+{
+    JSON_ASSERT(e > -1000);
+    JSON_ASSERT(e <  1000);
+
+    if (e < 0)
+    {
+        e = -e;
+        *buf++ = '-';
+    }
+    else
+    {
+        *buf++ = '+';
+    }
+
+    auto k = static_cast<std::uint32_t>(e);
+    if (k < 10)
+    {
+        // Always print at least two digits in the exponent.
+        // This is for compatibility with printf("%g").
+        *buf++ = '0';
+        *buf++ = static_cast<char>('0' + k);
+    }
+    else if (k < 100)
+    {
+        *buf++ = static_cast<char>('0' + k / 10);
+        k %= 10;
+        *buf++ = static_cast<char>('0' + k);
+    }
+    else
+    {
+        *buf++ = static_cast<char>('0' + k / 100);
+        k %= 100;
+        *buf++ = static_cast<char>('0' + k / 10);
+        k %= 10;
+        *buf++ = static_cast<char>('0' + k);
+    }
+
+    return buf;
+}
+
+/*!
+@brief prettify v = buf * 10^decimal_exponent
+
+If v is in the range [10^min_exp, 10^max_exp) it will be printed in fixed-point
+notation. Otherwise it will be printed in exponential notation.
+
+@pre min_exp < 0
+@pre max_exp > 0
+*/
+JSON_HEDLEY_NON_NULL(1)
+JSON_HEDLEY_RETURNS_NON_NULL
+inline char* format_buffer(char* buf, int len, int decimal_exponent,
+                           int min_exp, int max_exp)
+{
+    JSON_ASSERT(min_exp < 0);
+    JSON_ASSERT(max_exp > 0);
+
+    const int k = len;
+    const int n = len + decimal_exponent;
+
+    // v = buf * 10^(n-k)
+    // k is the length of the buffer (number of decimal digits)
+    // n is the position of the decimal point relative to the start of the buffer.
+
+    if (k <= n && n <= max_exp)
+    {
+        // digits[000]
+        // len <= max_exp + 2
+
+        std::memset(buf + k, '0', static_cast<size_t>(n) - static_cast<size_t>(k));
+        // Make it look like a floating-point number (#362, #378)
+        buf[n + 0] = '.';
+        buf[n + 1] = '0';
+        return buf + (static_cast<size_t>(n) + 2);
+    }
+
+    if (0 < n && n <= max_exp)
+    {
+        // dig.its
+        // len <= max_digits10 + 1
+
+        JSON_ASSERT(k > n);
+
+        std::memmove(buf + (static_cast<size_t>(n) + 1), buf + n, static_cast<size_t>(k) - static_cast<size_t>(n));
+        buf[n] = '.';
+        return buf + (static_cast<size_t>(k) + 1U);
+    }
+
+    if (min_exp < n && n <= 0)
+    {
+        // 0.[000]digits
+        // len <= 2 + (-min_exp - 1) + max_digits10
+
+        std::memmove(buf + (2 + static_cast<size_t>(-n)), buf, static_cast<size_t>(k));
+        buf[0] = '0';
+        buf[1] = '.';
+        std::memset(buf + 2, '0', static_cast<size_t>(-n));
+        return buf + (2U + static_cast<size_t>(-n) + static_cast<size_t>(k));
+    }
+
+    if (k == 1)
+    {
+        // dE+123
+        // len <= 1 + 5
+
+        buf += 1;
+    }
+    else
+    {
+        // d.igitsE+123
+        // len <= max_digits10 + 1 + 5
+
+        std::memmove(buf + 2, buf + 1, static_cast<size_t>(k) - 1);
+        buf[1] = '.';
+        buf += 1 + static_cast<size_t>(k);
+    }
+
+    *buf++ = 'e';
+    return append_exponent(buf, n - 1);
+}
+
+} // namespace dtoa_impl
+
+/*!
+@brief generates a decimal representation of the floating-point number value in [first, last).
+
+The format of the resulting decimal representation is similar to printf's %g
+format. Returns an iterator pointing past-the-end of the decimal representation.
+
+@note The input number must be finite, i.e. NaN's and Inf's are not supported.
+@note The buffer must be large enough.
+@note The result is NOT null-terminated.
+*/
+template<typename FloatType>
+JSON_HEDLEY_NON_NULL(1, 2)
+JSON_HEDLEY_RETURNS_NON_NULL
+char* to_chars(char* first, const char* last, FloatType value)
+{
+    static_cast<void>(last); // maybe unused - fix warning
+    JSON_ASSERT(std::isfinite(value));
+
+    // Use signbit(value) instead of (value < 0) since signbit works for -0.
+    if (std::signbit(value))
+    {
+        value = -value;
+        *first++ = '-';
+    }
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
+    if (value == 0) // +-0
+    {
+        *first++ = '0';
+        // Make it look like a floating-point number (#362, #378)
+        *first++ = '.';
+        *first++ = '0';
+        return first;
+    }
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
+    JSON_ASSERT(last - first >= std::numeric_limits<FloatType>::max_digits10);
+
+    // Compute v = buffer * 10^decimal_exponent.
+    // The decimal digits are stored in the buffer, which needs to be interpreted
+    // as an unsigned decimal integer.
+    // len is the length of the buffer, i.e. the number of decimal digits.
+    int len = 0;
+    int decimal_exponent = 0;
+    dtoa_impl::grisu2(first, len, decimal_exponent, value);
+
+    JSON_ASSERT(len <= std::numeric_limits<FloatType>::max_digits10);
+
+    // Format the buffer like printf("%.*g", prec, value)
+    constexpr int kMinExp = -4;
+    // Use digits10 here to increase compatibility with version 2.
+    constexpr int kMaxExp = std::numeric_limits<FloatType>::digits10;
+
+    JSON_ASSERT(last - first >= kMaxExp + 2);
+    JSON_ASSERT(last - first >= 2 + (-kMinExp - 1) + std::numeric_limits<FloatType>::max_digits10);
+    JSON_ASSERT(last - first >= std::numeric_limits<FloatType>::max_digits10 + 6);
+
+    return dtoa_impl::format_buffer(first, len, decimal_exponent, kMinExp, kMaxExp);
+}
+
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/output/binary_writer.hpp>
+
+// #include <nlohmann/detail/output/output_adapters.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+///////////////////
+// serialization //
+///////////////////
+
+/// how to treat decoding errors
+enum class error_handler_t
+{
+    strict,  ///< throw a type_error exception in case of invalid UTF-8
+    replace, ///< replace invalid UTF-8 sequences with U+FFFD
+    ignore   ///< ignore invalid UTF-8 sequences
+};
+
+template<typename BasicJsonType>
+class serializer
+{
+    using string_t = typename BasicJsonType::string_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using binary_char_t = typename BasicJsonType::binary_t::value_type;
+    static constexpr std::uint8_t UTF8_ACCEPT = 0;
+    static constexpr std::uint8_t UTF8_REJECT = 1;
+
+  public:
+    /*!
+    @param[in] s  output stream to serialize to
+    @param[in] ichar  indentation character to use
+    @param[in] error_handler_  how to react on decoding errors
+    */
+    serializer(output_adapter_t<char> s, const char ichar,
+               error_handler_t error_handler_ = error_handler_t::strict)
+        : o(std::move(s))
+        , loc(std::localeconv())
+        , thousands_sep(loc->thousands_sep == nullptr ? '\0' : std::char_traits<char>::to_char_type(* (loc->thousands_sep)))
+        , decimal_point(loc->decimal_point == nullptr ? '\0' : std::char_traits<char>::to_char_type(* (loc->decimal_point)))
+        , indent_char(ichar)
+        , indent_string(512, indent_char)
+        , error_handler(error_handler_)
+    {}
+
+    // delete because of pointer members
+    serializer(const serializer&) = delete;
+    serializer& operator=(const serializer&) = delete;
+    serializer(serializer&&) = delete;
+    serializer& operator=(serializer&&) = delete;
+    ~serializer() = default;
+
+    /*!
+    @brief internal implementation of the serialization function
+
+    This function is called by the public member function dump and organizes
+    the serialization internally. The indentation level is propagated as
+    additional parameter. In case of arrays and objects, the function is
+    called recursively.
+
+    - strings and object keys are escaped using `escape_string()`
+    - integer numbers are converted implicitly via `operator<<`
+    - floating-point numbers are converted to a string using `"%g"` format
+    - binary values are serialized as objects containing the subtype and the
+      byte array
+
+    @param[in] val               value to serialize
+    @param[in] pretty_print      whether the output shall be pretty-printed
+    @param[in] ensure_ascii If @a ensure_ascii is true, all non-ASCII characters
+    in the output are escaped with `\uXXXX` sequences, and the result consists
+    of ASCII characters only.
+    @param[in] indent_step       the indent level
+    @param[in] current_indent    the current indent level (only used internally)
+    */
+    void dump(const BasicJsonType& val,
+              const bool pretty_print,
+              const bool ensure_ascii,
+              const unsigned int indent_step,
+              const unsigned int current_indent = 0)
+    {
+        switch (val.m_type)
+        {
+            case value_t::object:
+            {
+                if (val.m_value.object->empty())
+                {
+                    o->write_characters("{}", 2);
+                    return;
+                }
+
+                if (pretty_print)
+                {
+                    o->write_characters("{\n", 2);
+
+                    // variable to hold indentation for recursive calls
+                    const auto new_indent = current_indent + indent_step;
+                    if (JSON_HEDLEY_UNLIKELY(indent_string.size() < new_indent))
+                    {
+                        indent_string.resize(indent_string.size() * 2, ' ');
+                    }
+
+                    // first n-1 elements
+                    auto i = val.m_value.object->cbegin();
+                    for (std::size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
+                    {
+                        o->write_characters(indent_string.c_str(), new_indent);
+                        o->write_character('\"');
+                        dump_escaped(i->first, ensure_ascii);
+                        o->write_characters("\": ", 3);
+                        dump(i->second, true, ensure_ascii, indent_step, new_indent);
+                        o->write_characters(",\n", 2);
+                    }
+
+                    // last element
+                    JSON_ASSERT(i != val.m_value.object->cend());
+                    JSON_ASSERT(std::next(i) == val.m_value.object->cend());
+                    o->write_characters(indent_string.c_str(), new_indent);
+                    o->write_character('\"');
+                    dump_escaped(i->first, ensure_ascii);
+                    o->write_characters("\": ", 3);
+                    dump(i->second, true, ensure_ascii, indent_step, new_indent);
+
+                    o->write_character('\n');
+                    o->write_characters(indent_string.c_str(), current_indent);
+                    o->write_character('}');
+                }
+                else
+                {
+                    o->write_character('{');
+
+                    // first n-1 elements
+                    auto i = val.m_value.object->cbegin();
+                    for (std::size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
+                    {
+                        o->write_character('\"');
+                        dump_escaped(i->first, ensure_ascii);
+                        o->write_characters("\":", 2);
+                        dump(i->second, false, ensure_ascii, indent_step, current_indent);
+                        o->write_character(',');
+                    }
+
+                    // last element
+                    JSON_ASSERT(i != val.m_value.object->cend());
+                    JSON_ASSERT(std::next(i) == val.m_value.object->cend());
+                    o->write_character('\"');
+                    dump_escaped(i->first, ensure_ascii);
+                    o->write_characters("\":", 2);
+                    dump(i->second, false, ensure_ascii, indent_step, current_indent);
+
+                    o->write_character('}');
+                }
+
+                return;
+            }
+
+            case value_t::array:
+            {
+                if (val.m_value.array->empty())
+                {
+                    o->write_characters("[]", 2);
+                    return;
+                }
+
+                if (pretty_print)
+                {
+                    o->write_characters("[\n", 2);
+
+                    // variable to hold indentation for recursive calls
+                    const auto new_indent = current_indent + indent_step;
+                    if (JSON_HEDLEY_UNLIKELY(indent_string.size() < new_indent))
+                    {
+                        indent_string.resize(indent_string.size() * 2, ' ');
+                    }
+
+                    // first n-1 elements
+                    for (auto i = val.m_value.array->cbegin();
+                            i != val.m_value.array->cend() - 1; ++i)
+                    {
+                        o->write_characters(indent_string.c_str(), new_indent);
+                        dump(*i, true, ensure_ascii, indent_step, new_indent);
+                        o->write_characters(",\n", 2);
+                    }
+
+                    // last element
+                    JSON_ASSERT(!val.m_value.array->empty());
+                    o->write_characters(indent_string.c_str(), new_indent);
+                    dump(val.m_value.array->back(), true, ensure_ascii, indent_step, new_indent);
+
+                    o->write_character('\n');
+                    o->write_characters(indent_string.c_str(), current_indent);
+                    o->write_character(']');
+                }
+                else
+                {
+                    o->write_character('[');
+
+                    // first n-1 elements
+                    for (auto i = val.m_value.array->cbegin();
+                            i != val.m_value.array->cend() - 1; ++i)
+                    {
+                        dump(*i, false, ensure_ascii, indent_step, current_indent);
+                        o->write_character(',');
+                    }
+
+                    // last element
+                    JSON_ASSERT(!val.m_value.array->empty());
+                    dump(val.m_value.array->back(), false, ensure_ascii, indent_step, current_indent);
+
+                    o->write_character(']');
+                }
+
+                return;
+            }
+
+            case value_t::string:
+            {
+                o->write_character('\"');
+                dump_escaped(*val.m_value.string, ensure_ascii);
+                o->write_character('\"');
+                return;
+            }
+
+            case value_t::binary:
+            {
+                if (pretty_print)
+                {
+                    o->write_characters("{\n", 2);
+
+                    // variable to hold indentation for recursive calls
+                    const auto new_indent = current_indent + indent_step;
+                    if (JSON_HEDLEY_UNLIKELY(indent_string.size() < new_indent))
+                    {
+                        indent_string.resize(indent_string.size() * 2, ' ');
+                    }
+
+                    o->write_characters(indent_string.c_str(), new_indent);
+
+                    o->write_characters("\"bytes\": [", 10);
+
+                    if (!val.m_value.binary->empty())
+                    {
+                        for (auto i = val.m_value.binary->cbegin();
+                                i != val.m_value.binary->cend() - 1; ++i)
+                        {
+                            dump_integer(*i);
+                            o->write_characters(", ", 2);
+                        }
+                        dump_integer(val.m_value.binary->back());
+                    }
+
+                    o->write_characters("],\n", 3);
+                    o->write_characters(indent_string.c_str(), new_indent);
+
+                    o->write_characters("\"subtype\": ", 11);
+                    if (val.m_value.binary->has_subtype())
+                    {
+                        dump_integer(val.m_value.binary->subtype());
+                    }
+                    else
+                    {
+                        o->write_characters("null", 4);
+                    }
+                    o->write_character('\n');
+                    o->write_characters(indent_string.c_str(), current_indent);
+                    o->write_character('}');
+                }
+                else
+                {
+                    o->write_characters("{\"bytes\":[", 10);
+
+                    if (!val.m_value.binary->empty())
+                    {
+                        for (auto i = val.m_value.binary->cbegin();
+                                i != val.m_value.binary->cend() - 1; ++i)
+                        {
+                            dump_integer(*i);
+                            o->write_character(',');
+                        }
+                        dump_integer(val.m_value.binary->back());
+                    }
+
+                    o->write_characters("],\"subtype\":", 12);
+                    if (val.m_value.binary->has_subtype())
+                    {
+                        dump_integer(val.m_value.binary->subtype());
+                        o->write_character('}');
+                    }
+                    else
+                    {
+                        o->write_characters("null}", 5);
+                    }
+                }
+                return;
+            }
+
+            case value_t::boolean:
+            {
+                if (val.m_value.boolean)
+                {
+                    o->write_characters("true", 4);
+                }
+                else
+                {
+                    o->write_characters("false", 5);
+                }
+                return;
+            }
+
+            case value_t::number_integer:
+            {
+                dump_integer(val.m_value.number_integer);
+                return;
+            }
+
+            case value_t::number_unsigned:
+            {
+                dump_integer(val.m_value.number_unsigned);
+                return;
+            }
+
+            case value_t::number_float:
+            {
+                dump_float(val.m_value.number_float);
+                return;
+            }
+
+            case value_t::discarded:
+            {
+                o->write_characters("<discarded>", 11);
+                return;
+            }
+
+            case value_t::null:
+            {
+                o->write_characters("null", 4);
+                return;
+            }
+
+            default:            // LCOV_EXCL_LINE
+                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+        }
+    }
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    /*!
+    @brief dump escaped string
+
+    Escape a string by replacing certain special characters by a sequence of an
+    escape character (backslash) and another character and other control
+    characters by a sequence of "\u" followed by a four-digit hex
+    representation. The escaped string is written to output stream @a o.
+
+    @param[in] s  the string to escape
+    @param[in] ensure_ascii  whether to escape non-ASCII characters with
+                             \uXXXX sequences
+
+    @complexity Linear in the length of string @a s.
+    */
+    void dump_escaped(const string_t& s, const bool ensure_ascii)
+    {
+        std::uint32_t codepoint{};
+        std::uint8_t state = UTF8_ACCEPT;
+        std::size_t bytes = 0;  // number of bytes written to string_buffer
+
+        // number of bytes written at the point of the last valid byte
+        std::size_t bytes_after_last_accept = 0;
+        std::size_t undumped_chars = 0;
+
+        for (std::size_t i = 0; i < s.size(); ++i)
+        {
+            const auto byte = static_cast<std::uint8_t>(s[i]);
+
+            switch (decode(state, codepoint, byte))
+            {
+                case UTF8_ACCEPT:  // decode found a new code point
+                {
+                    switch (codepoint)
+                    {
+                        case 0x08: // backspace
+                        {
+                            string_buffer[bytes++] = '\\';
+                            string_buffer[bytes++] = 'b';
+                            break;
+                        }
+
+                        case 0x09: // horizontal tab
+                        {
+                            string_buffer[bytes++] = '\\';
+                            string_buffer[bytes++] = 't';
+                            break;
+                        }
+
+                        case 0x0A: // newline
+                        {
+                            string_buffer[bytes++] = '\\';
+                            string_buffer[bytes++] = 'n';
+                            break;
+                        }
+
+                        case 0x0C: // formfeed
+                        {
+                            string_buffer[bytes++] = '\\';
+                            string_buffer[bytes++] = 'f';
+                            break;
+                        }
+
+                        case 0x0D: // carriage return
+                        {
+                            string_buffer[bytes++] = '\\';
+                            string_buffer[bytes++] = 'r';
+                            break;
+                        }
+
+                        case 0x22: // quotation mark
+                        {
+                            string_buffer[bytes++] = '\\';
+                            string_buffer[bytes++] = '\"';
+                            break;
+                        }
+
+                        case 0x5C: // reverse solidus
+                        {
+                            string_buffer[bytes++] = '\\';
+                            string_buffer[bytes++] = '\\';
+                            break;
+                        }
+
+                        default:
+                        {
+                            // escape control characters (0x00..0x1F) or, if
+                            // ensure_ascii parameter is used, non-ASCII characters
+                            if ((codepoint <= 0x1F) || (ensure_ascii && (codepoint >= 0x7F)))
+                            {
+                                if (codepoint <= 0xFFFF)
+                                {
+                                    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+                                    (std::snprintf)(string_buffer.data() + bytes, 7, "\\u%04x",
+                                                    static_cast<std::uint16_t>(codepoint));
+                                    bytes += 6;
+                                }
+                                else
+                                {
+                                    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+                                    (std::snprintf)(string_buffer.data() + bytes, 13, "\\u%04x\\u%04x",
+                                                    static_cast<std::uint16_t>(0xD7C0u + (codepoint >> 10u)),
+                                                    static_cast<std::uint16_t>(0xDC00u + (codepoint & 0x3FFu)));
+                                    bytes += 12;
+                                }
+                            }
+                            else
+                            {
+                                // copy byte to buffer (all previous bytes
+                                // been copied have in default case above)
+                                string_buffer[bytes++] = s[i];
+                            }
+                            break;
+                        }
+                    }
+
+                    // write buffer and reset index; there must be 13 bytes
+                    // left, as this is the maximal number of bytes to be
+                    // written ("\uxxxx\uxxxx\0") for one code point
+                    if (string_buffer.size() - bytes < 13)
+                    {
+                        o->write_characters(string_buffer.data(), bytes);
+                        bytes = 0;
+                    }
+
+                    // remember the byte position of this accept
+                    bytes_after_last_accept = bytes;
+                    undumped_chars = 0;
+                    break;
+                }
+
+                case UTF8_REJECT:  // decode found invalid UTF-8 byte
+                {
+                    switch (error_handler)
+                    {
+                        case error_handler_t::strict:
+                        {
+                            std::string sn(9, '\0');
+                            // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+                            (std::snprintf)(&sn[0], sn.size(), "%.2X", byte);
+                            JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + sn, BasicJsonType()));
+                        }
+
+                        case error_handler_t::ignore:
+                        case error_handler_t::replace:
+                        {
+                            // in case we saw this character the first time, we
+                            // would like to read it again, because the byte
+                            // may be OK for itself, but just not OK for the
+                            // previous sequence
+                            if (undumped_chars > 0)
+                            {
+                                --i;
+                            }
+
+                            // reset length buffer to the last accepted index;
+                            // thus removing/ignoring the invalid characters
+                            bytes = bytes_after_last_accept;
+
+                            if (error_handler == error_handler_t::replace)
+                            {
+                                // add a replacement character
+                                if (ensure_ascii)
+                                {
+                                    string_buffer[bytes++] = '\\';
+                                    string_buffer[bytes++] = 'u';
+                                    string_buffer[bytes++] = 'f';
+                                    string_buffer[bytes++] = 'f';
+                                    string_buffer[bytes++] = 'f';
+                                    string_buffer[bytes++] = 'd';
+                                }
+                                else
+                                {
+                                    string_buffer[bytes++] = detail::binary_writer<BasicJsonType, char>::to_char_type('\xEF');
+                                    string_buffer[bytes++] = detail::binary_writer<BasicJsonType, char>::to_char_type('\xBF');
+                                    string_buffer[bytes++] = detail::binary_writer<BasicJsonType, char>::to_char_type('\xBD');
+                                }
+
+                                // write buffer and reset index; there must be 13 bytes
+                                // left, as this is the maximal number of bytes to be
+                                // written ("\uxxxx\uxxxx\0") for one code point
+                                if (string_buffer.size() - bytes < 13)
+                                {
+                                    o->write_characters(string_buffer.data(), bytes);
+                                    bytes = 0;
+                                }
+
+                                bytes_after_last_accept = bytes;
+                            }
+
+                            undumped_chars = 0;
+
+                            // continue processing the string
+                            state = UTF8_ACCEPT;
+                            break;
+                        }
+
+                        default:            // LCOV_EXCL_LINE
+                            JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+                    }
+                    break;
+                }
+
+                default:  // decode found yet incomplete multi-byte code point
+                {
+                    if (!ensure_ascii)
+                    {
+                        // code point will not be escaped - copy byte to buffer
+                        string_buffer[bytes++] = s[i];
+                    }
+                    ++undumped_chars;
+                    break;
+                }
+            }
+        }
+
+        // we finished processing the string
+        if (JSON_HEDLEY_LIKELY(state == UTF8_ACCEPT))
+        {
+            // write buffer
+            if (bytes > 0)
+            {
+                o->write_characters(string_buffer.data(), bytes);
+            }
+        }
+        else
+        {
+            // we finish reading, but do not accept: string was incomplete
+            switch (error_handler)
+            {
+                case error_handler_t::strict:
+                {
+                    std::string sn(9, '\0');
+                    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+                    (std::snprintf)(&sn[0], sn.size(), "%.2X", static_cast<std::uint8_t>(s.back()));
+                    JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + sn, BasicJsonType()));
+                }
+
+                case error_handler_t::ignore:
+                {
+                    // write all accepted bytes
+                    o->write_characters(string_buffer.data(), bytes_after_last_accept);
+                    break;
+                }
+
+                case error_handler_t::replace:
+                {
+                    // write all accepted bytes
+                    o->write_characters(string_buffer.data(), bytes_after_last_accept);
+                    // add a replacement character
+                    if (ensure_ascii)
+                    {
+                        o->write_characters("\\ufffd", 6);
+                    }
+                    else
+                    {
+                        o->write_characters("\xEF\xBF\xBD", 3);
+                    }
+                    break;
+                }
+
+                default:            // LCOV_EXCL_LINE
+                    JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+            }
+        }
+    }
+
+  private:
+    /*!
+    @brief count digits
+
+    Count the number of decimal (base 10) digits for an input unsigned integer.
+
+    @param[in] x  unsigned integer number to count its digits
+    @return    number of decimal digits
+    */
+    inline unsigned int count_digits(number_unsigned_t x) noexcept
+    {
+        unsigned int n_digits = 1;
+        for (;;)
+        {
+            if (x < 10)
+            {
+                return n_digits;
+            }
+            if (x < 100)
+            {
+                return n_digits + 1;
+            }
+            if (x < 1000)
+            {
+                return n_digits + 2;
+            }
+            if (x < 10000)
+            {
+                return n_digits + 3;
+            }
+            x = x / 10000u;
+            n_digits += 4;
+        }
+    }
+
+    /*!
+    @brief dump an integer
+
+    Dump a given integer to output stream @a o. Works internally with
+    @a number_buffer.
+
+    @param[in] x  integer number (signed or unsigned) to dump
+    @tparam NumberType either @a number_integer_t or @a number_unsigned_t
+    */
+    template < typename NumberType, detail::enable_if_t <
+                   std::is_integral<NumberType>::value ||
+                   std::is_same<NumberType, number_unsigned_t>::value ||
+                   std::is_same<NumberType, number_integer_t>::value ||
+                   std::is_same<NumberType, binary_char_t>::value,
+                   int > = 0 >
+    void dump_integer(NumberType x)
+    {
+        static constexpr std::array<std::array<char, 2>, 100> digits_to_99
+        {
+            {
+                {{'0', '0'}}, {{'0', '1'}}, {{'0', '2'}}, {{'0', '3'}}, {{'0', '4'}}, {{'0', '5'}}, {{'0', '6'}}, {{'0', '7'}}, {{'0', '8'}}, {{'0', '9'}},
+                {{'1', '0'}}, {{'1', '1'}}, {{'1', '2'}}, {{'1', '3'}}, {{'1', '4'}}, {{'1', '5'}}, {{'1', '6'}}, {{'1', '7'}}, {{'1', '8'}}, {{'1', '9'}},
+                {{'2', '0'}}, {{'2', '1'}}, {{'2', '2'}}, {{'2', '3'}}, {{'2', '4'}}, {{'2', '5'}}, {{'2', '6'}}, {{'2', '7'}}, {{'2', '8'}}, {{'2', '9'}},
+                {{'3', '0'}}, {{'3', '1'}}, {{'3', '2'}}, {{'3', '3'}}, {{'3', '4'}}, {{'3', '5'}}, {{'3', '6'}}, {{'3', '7'}}, {{'3', '8'}}, {{'3', '9'}},
+                {{'4', '0'}}, {{'4', '1'}}, {{'4', '2'}}, {{'4', '3'}}, {{'4', '4'}}, {{'4', '5'}}, {{'4', '6'}}, {{'4', '7'}}, {{'4', '8'}}, {{'4', '9'}},
+                {{'5', '0'}}, {{'5', '1'}}, {{'5', '2'}}, {{'5', '3'}}, {{'5', '4'}}, {{'5', '5'}}, {{'5', '6'}}, {{'5', '7'}}, {{'5', '8'}}, {{'5', '9'}},
+                {{'6', '0'}}, {{'6', '1'}}, {{'6', '2'}}, {{'6', '3'}}, {{'6', '4'}}, {{'6', '5'}}, {{'6', '6'}}, {{'6', '7'}}, {{'6', '8'}}, {{'6', '9'}},
+                {{'7', '0'}}, {{'7', '1'}}, {{'7', '2'}}, {{'7', '3'}}, {{'7', '4'}}, {{'7', '5'}}, {{'7', '6'}}, {{'7', '7'}}, {{'7', '8'}}, {{'7', '9'}},
+                {{'8', '0'}}, {{'8', '1'}}, {{'8', '2'}}, {{'8', '3'}}, {{'8', '4'}}, {{'8', '5'}}, {{'8', '6'}}, {{'8', '7'}}, {{'8', '8'}}, {{'8', '9'}},
+                {{'9', '0'}}, {{'9', '1'}}, {{'9', '2'}}, {{'9', '3'}}, {{'9', '4'}}, {{'9', '5'}}, {{'9', '6'}}, {{'9', '7'}}, {{'9', '8'}}, {{'9', '9'}},
+            }
+        };
+
+        // special case for "0"
+        if (x == 0)
+        {
+            o->write_character('0');
+            return;
+        }
+
+        // use a pointer to fill the buffer
+        auto buffer_ptr = number_buffer.begin(); // NOLINT(llvm-qualified-auto,readability-qualified-auto,cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+
+        const bool is_negative = std::is_signed<NumberType>::value && !(x >= 0); // see issue #755
+        number_unsigned_t abs_value;
+
+        unsigned int n_chars{};
+
+        if (is_negative)
+        {
+            *buffer_ptr = '-';
+            abs_value = remove_sign(static_cast<number_integer_t>(x));
+
+            // account one more byte for the minus sign
+            n_chars = 1 + count_digits(abs_value);
+        }
+        else
+        {
+            abs_value = static_cast<number_unsigned_t>(x);
+            n_chars = count_digits(abs_value);
+        }
+
+        // spare 1 byte for '\0'
+        JSON_ASSERT(n_chars < number_buffer.size() - 1);
+
+        // jump to the end to generate the string from backward
+        // so we later avoid reversing the result
+        buffer_ptr += n_chars;
+
+        // Fast int2ascii implementation inspired by "Fastware" talk by Andrei Alexandrescu
+        // See: https://www.youtube.com/watch?v=o4-CwDo2zpg
+        while (abs_value >= 100)
+        {
+            const auto digits_index = static_cast<unsigned>((abs_value % 100));
+            abs_value /= 100;
+            *(--buffer_ptr) = digits_to_99[digits_index][1];
+            *(--buffer_ptr) = digits_to_99[digits_index][0];
+        }
+
+        if (abs_value >= 10)
+        {
+            const auto digits_index = static_cast<unsigned>(abs_value);
+            *(--buffer_ptr) = digits_to_99[digits_index][1];
+            *(--buffer_ptr) = digits_to_99[digits_index][0];
+        }
+        else
+        {
+            *(--buffer_ptr) = static_cast<char>('0' + abs_value);
+        }
+
+        o->write_characters(number_buffer.data(), n_chars);
+    }
+
+    /*!
+    @brief dump a floating-point number
+
+    Dump a given floating-point number to output stream @a o. Works internally
+    with @a number_buffer.
+
+    @param[in] x  floating-point number to dump
+    */
+    void dump_float(number_float_t x)
+    {
+        // NaN / inf
+        if (!std::isfinite(x))
+        {
+            o->write_characters("null", 4);
+            return;
+        }
+
+        // If number_float_t is an IEEE-754 single or double precision number,
+        // use the Grisu2 algorithm to produce short numbers which are
+        // guaranteed to round-trip, using strtof and strtod, resp.
+        //
+        // NB: The test below works if <long double> == <double>.
+        static constexpr bool is_ieee_single_or_double
+            = (std::numeric_limits<number_float_t>::is_iec559 && std::numeric_limits<number_float_t>::digits == 24 && std::numeric_limits<number_float_t>::max_exponent == 128) ||
+              (std::numeric_limits<number_float_t>::is_iec559 && std::numeric_limits<number_float_t>::digits == 53 && std::numeric_limits<number_float_t>::max_exponent == 1024);
+
+        dump_float(x, std::integral_constant<bool, is_ieee_single_or_double>());
+    }
+
+    void dump_float(number_float_t x, std::true_type /*is_ieee_single_or_double*/)
+    {
+        auto* begin = number_buffer.data();
+        auto* end = ::nlohmann::detail::to_chars(begin, begin + number_buffer.size(), x);
+
+        o->write_characters(begin, static_cast<size_t>(end - begin));
+    }
+
+    void dump_float(number_float_t x, std::false_type /*is_ieee_single_or_double*/)
+    {
+        // get number of digits for a float -> text -> float round-trip
+        static constexpr auto d = std::numeric_limits<number_float_t>::max_digits10;
+
+        // the actual conversion
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+        std::ptrdiff_t len = (std::snprintf)(number_buffer.data(), number_buffer.size(), "%.*g", d, x);
+
+        // negative value indicates an error
+        JSON_ASSERT(len > 0);
+        // check if buffer was large enough
+        JSON_ASSERT(static_cast<std::size_t>(len) < number_buffer.size());
+
+        // erase thousands separator
+        if (thousands_sep != '\0')
+        {
+            // NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::remove returns an iterator, see https://github.com/nlohmann/json/issues/3081
+            const auto end = std::remove(number_buffer.begin(), number_buffer.begin() + len, thousands_sep);
+            std::fill(end, number_buffer.end(), '\0');
+            JSON_ASSERT((end - number_buffer.begin()) <= len);
+            len = (end - number_buffer.begin());
+        }
+
+        // convert decimal point to '.'
+        if (decimal_point != '\0' && decimal_point != '.')
+        {
+            // NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::find returns an iterator, see https://github.com/nlohmann/json/issues/3081
+            const auto dec_pos = std::find(number_buffer.begin(), number_buffer.end(), decimal_point);
+            if (dec_pos != number_buffer.end())
+            {
+                *dec_pos = '.';
+            }
+        }
+
+        o->write_characters(number_buffer.data(), static_cast<std::size_t>(len));
+
+        // determine if need to append ".0"
+        const bool value_is_int_like =
+            std::none_of(number_buffer.begin(), number_buffer.begin() + len + 1,
+                         [](char c)
+        {
+            return c == '.' || c == 'e';
+        });
+
+        if (value_is_int_like)
+        {
+            o->write_characters(".0", 2);
+        }
+    }
+
+    /*!
+    @brief check whether a string is UTF-8 encoded
+
+    The function checks each byte of a string whether it is UTF-8 encoded. The
+    result of the check is stored in the @a state parameter. The function must
+    be called initially with state 0 (accept). State 1 means the string must
+    be rejected, because the current byte is not allowed. If the string is
+    completely processed, but the state is non-zero, the string ended
+    prematurely; that is, the last byte indicated more bytes should have
+    followed.
+
+    @param[in,out] state  the state of the decoding
+    @param[in,out] codep  codepoint (valid only if resulting state is UTF8_ACCEPT)
+    @param[in] byte       next byte to decode
+    @return               new state
+
+    @note The function has been edited: a std::array is used.
+
+    @copyright Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+    @sa http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
+    */
+    static std::uint8_t decode(std::uint8_t& state, std::uint32_t& codep, const std::uint8_t byte) noexcept
+    {
+        static const std::array<std::uint8_t, 400> utf8d =
+        {
+            {
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 00..1F
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 20..3F
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 40..5F
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 60..7F
+                1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 80..9F
+                7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, // A0..BF
+                8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // C0..DF
+                0xA, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x4, 0x3, 0x3, // E0..EF
+                0xB, 0x6, 0x6, 0x6, 0x5, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, // F0..FF
+                0x0, 0x1, 0x2, 0x3, 0x5, 0x8, 0x7, 0x1, 0x1, 0x1, 0x4, 0x6, 0x1, 0x1, 0x1, 0x1, // s0..s0
+                1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, // s1..s2
+                1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, // s3..s4
+                1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, // s5..s6
+                1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // s7..s8
+            }
+        };
+
+        JSON_ASSERT(byte < utf8d.size());
+        const std::uint8_t type = utf8d[byte];
+
+        codep = (state != UTF8_ACCEPT)
+                ? (byte & 0x3fu) | (codep << 6u)
+                : (0xFFu >> type) & (byte);
+
+        std::size_t index = 256u + static_cast<size_t>(state) * 16u + static_cast<size_t>(type);
+        JSON_ASSERT(index < 400);
+        state = utf8d[index];
+        return state;
+    }
+
+    /*
+     * Overload to make the compiler happy while it is instantiating
+     * dump_integer for number_unsigned_t.
+     * Must never be called.
+     */
+    number_unsigned_t remove_sign(number_unsigned_t x)
+    {
+        JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+        return x; // LCOV_EXCL_LINE
+    }
+
+    /*
+     * Helper function for dump_integer
+     *
+     * This function takes a negative signed integer and returns its absolute
+     * value as unsigned integer. The plus/minus shuffling is necessary as we can
+     * not directly remove the sign of an arbitrary signed integer as the
+     * absolute values of INT_MIN and INT_MAX are usually not the same. See
+     * #1708 for details.
+     */
+    inline number_unsigned_t remove_sign(number_integer_t x) noexcept
+    {
+        JSON_ASSERT(x < 0 && x < (std::numeric_limits<number_integer_t>::max)()); // NOLINT(misc-redundant-expression)
+        return static_cast<number_unsigned_t>(-(x + 1)) + 1;
+    }
+
+  private:
+    /// the output of the serializer
+    output_adapter_t<char> o = nullptr;
+
+    /// a (hopefully) large enough character buffer
+    std::array<char, 64> number_buffer{{}};
+
+    /// the locale
+    const std::lconv* loc = nullptr;
+    /// the locale's thousand separator character
+    const char thousands_sep = '\0';
+    /// the locale's decimal point character
+    const char decimal_point = '\0';
+
+    /// string buffer
+    std::array<char, 512> string_buffer{{}};
+
+    /// the indentation character
+    const char indent_char;
+    /// the indentation string
+    string_t indent_string;
+
+    /// error_handler how to react on decoding errors
+    const error_handler_t error_handler;
+};
+}  // namespace detail
+}  // namespace nlohmann
+
+// #include <nlohmann/detail/value_t.hpp>
+
+// #include <nlohmann/json_fwd.hpp>
+
+// #include <nlohmann/ordered_map.hpp>
+
+
+#include <functional> // less
+#include <initializer_list> // initializer_list
+#include <iterator> // input_iterator_tag, iterator_traits
+#include <memory> // allocator
+#include <stdexcept> // for out_of_range
+#include <type_traits> // enable_if, is_convertible
+#include <utility> // pair
+#include <vector> // vector
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+
+/// ordered_map: a minimal map-like container that preserves insertion order
+/// for use within nlohmann::basic_json<ordered_map>
+template <class Key, class T, class IgnoredLess = std::less<Key>,
+          class Allocator = std::allocator<std::pair<const Key, T>>>
+                  struct ordered_map : std::vector<std::pair<const Key, T>, Allocator>
+{
+    using key_type = Key;
+    using mapped_type = T;
+    using Container = std::vector<std::pair<const Key, T>, Allocator>;
+    using typename Container::iterator;
+    using typename Container::const_iterator;
+    using typename Container::size_type;
+    using typename Container::value_type;
+
+    // Explicit constructors instead of `using Container::Container`
+    // otherwise older compilers choke on it (GCC <= 5.5, xcode <= 9.4)
+    ordered_map(const Allocator& alloc = Allocator()) : Container{alloc} {}
+    template <class It>
+    ordered_map(It first, It last, const Allocator& alloc = Allocator())
+        : Container{first, last, alloc} {}
+    ordered_map(std::initializer_list<T> init, const Allocator& alloc = Allocator() )
+        : Container{init, alloc} {}
+
+    std::pair<iterator, bool> emplace(const key_type& key, T&& t)
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return {it, false};
+            }
+        }
+        Container::emplace_back(key, t);
+        return {--this->end(), true};
+    }
+
+    T& operator[](const Key& key)
+    {
+        return emplace(key, T{}).first->second;
+    }
+
+    const T& operator[](const Key& key) const
+    {
+        return at(key);
+    }
+
+    T& at(const Key& key)
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return it->second;
+            }
+        }
+
+        JSON_THROW(std::out_of_range("key not found"));
+    }
+
+    const T& at(const Key& key) const
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return it->second;
+            }
+        }
+
+        JSON_THROW(std::out_of_range("key not found"));
+    }
+
+    size_type erase(const Key& key)
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == key)
+            {
+                // Since we cannot move const Keys, re-construct them in place
+                for (auto next = it; ++next != this->end(); ++it)
+                {
+                    it->~value_type(); // Destroy but keep allocation
+                    new (&*it) value_type{std::move(*next)};
+                }
+                Container::pop_back();
+                return 1;
+            }
+        }
+        return 0;
+    }
+
+    iterator erase(iterator pos)
+    {
+        auto it = pos;
+
+        // Since we cannot move const Keys, re-construct them in place
+        for (auto next = it; ++next != this->end(); ++it)
+        {
+            it->~value_type(); // Destroy but keep allocation
+            new (&*it) value_type{std::move(*next)};
+        }
+        Container::pop_back();
+        return pos;
+    }
+
+    size_type count(const Key& key) const
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return 1;
+            }
+        }
+        return 0;
+    }
+
+    iterator find(const Key& key)
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return it;
+            }
+        }
+        return Container::end();
+    }
+
+    const_iterator find(const Key& key) const
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return it;
+            }
+        }
+        return Container::end();
+    }
+
+    std::pair<iterator, bool> insert( value_type&& value )
+    {
+        return emplace(value.first, std::move(value.second));
+    }
+
+    std::pair<iterator, bool> insert( const value_type& value )
+    {
+        for (auto it = this->begin(); it != this->end(); ++it)
+        {
+            if (it->first == value.first)
+            {
+                return {it, false};
+            }
+        }
+        Container::push_back(value);
+        return {--this->end(), true};
+    }
+
+    template<typename InputIt>
+    using require_input_iter = typename std::enable_if<std::is_convertible<typename std::iterator_traits<InputIt>::iterator_category,
+            std::input_iterator_tag>::value>::type;
+
+    template<typename InputIt, typename = require_input_iter<InputIt>>
+    void insert(InputIt first, InputIt last)
+    {
+        for (auto it = first; it != last; ++it)
+        {
+            insert(*it);
+        }
+    }
+};
+
+}  // namespace nlohmann
+
+
+#if defined(JSON_HAS_CPP_17)
+    #include <string_view>
+#endif
+
+/*!
+@brief namespace for Niels Lohmann
+@see https://github.com/nlohmann
+@since version 1.0.0
+*/
+namespace nlohmann
+{
+
+/*!
+@brief a class to store JSON values
+
+@tparam ObjectType type for JSON objects (`std::map` by default; will be used
+in @ref object_t)
+@tparam ArrayType type for JSON arrays (`std::vector` by default; will be used
+in @ref array_t)
+@tparam StringType type for JSON strings and object keys (`std::string` by
+default; will be used in @ref string_t)
+@tparam BooleanType type for JSON booleans (`bool` by default; will be used
+in @ref boolean_t)
+@tparam NumberIntegerType type for JSON integer numbers (`int64_t` by
+default; will be used in @ref number_integer_t)
+@tparam NumberUnsignedType type for JSON unsigned integer numbers (@c
+`uint64_t` by default; will be used in @ref number_unsigned_t)
+@tparam NumberFloatType type for JSON floating-point numbers (`double` by
+default; will be used in @ref number_float_t)
+@tparam BinaryType type for packed binary data for compatibility with binary
+serialization formats (`std::vector<std::uint8_t>` by default; will be used in
+@ref binary_t)
+@tparam AllocatorType type of the allocator to use (`std::allocator` by
+default)
+@tparam JSONSerializer the serializer to resolve internal calls to `to_json()`
+and `from_json()` (@ref adl_serializer by default)
+
+@requirement The class satisfies the following concept requirements:
+- Basic
+ - [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible):
+   JSON values can be default constructed. The result will be a JSON null
+   value.
+ - [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible):
+   A JSON value can be constructed from an rvalue argument.
+ - [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible):
+   A JSON value can be copy-constructed from an lvalue expression.
+ - [MoveAssignable](https://en.cppreference.com/w/cpp/named_req/MoveAssignable):
+   A JSON value van be assigned from an rvalue argument.
+ - [CopyAssignable](https://en.cppreference.com/w/cpp/named_req/CopyAssignable):
+   A JSON value can be copy-assigned from an lvalue expression.
+ - [Destructible](https://en.cppreference.com/w/cpp/named_req/Destructible):
+   JSON values can be destructed.
+- Layout
+ - [StandardLayoutType](https://en.cppreference.com/w/cpp/named_req/StandardLayoutType):
+   JSON values have
+   [standard layout](https://en.cppreference.com/w/cpp/language/data_members#Standard_layout):
+   All non-static data members are private and standard layout types, the
+   class has no virtual functions or (virtual) base classes.
+- Library-wide
+ - [EqualityComparable](https://en.cppreference.com/w/cpp/named_req/EqualityComparable):
+   JSON values can be compared with `==`, see @ref
+   operator==(const_reference,const_reference).
+ - [LessThanComparable](https://en.cppreference.com/w/cpp/named_req/LessThanComparable):
+   JSON values can be compared with `<`, see @ref
+   operator<(const_reference,const_reference).
+ - [Swappable](https://en.cppreference.com/w/cpp/named_req/Swappable):
+   Any JSON lvalue or rvalue of can be swapped with any lvalue or rvalue of
+   other compatible types, using unqualified function call @ref swap().
+ - [NullablePointer](https://en.cppreference.com/w/cpp/named_req/NullablePointer):
+   JSON values can be compared against `std::nullptr_t` objects which are used
+   to model the `null` value.
+- Container
+ - [Container](https://en.cppreference.com/w/cpp/named_req/Container):
+   JSON values can be used like STL containers and provide iterator access.
+ - [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer);
+   JSON values can be used like STL containers and provide reverse iterator
+   access.
+
+@invariant The member variables @a m_value and @a m_type have the following
+relationship:
+- If `m_type == value_t::object`, then `m_value.object != nullptr`.
+- If `m_type == value_t::array`, then `m_value.array != nullptr`.
+- If `m_type == value_t::string`, then `m_value.string != nullptr`.
+The invariants are checked by member function assert_invariant().
+
+@internal
+@note ObjectType trick from https://stackoverflow.com/a/9860911
+@endinternal
+
+@see [RFC 8259: The JavaScript Object Notation (JSON) Data Interchange
+Format](https://tools.ietf.org/html/rfc8259)
+
+@since version 1.0.0
+
+@nosubgrouping
+*/
+NLOHMANN_BASIC_JSON_TPL_DECLARATION
+class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-special-member-functions)
+{
+  private:
+    template<detail::value_t> friend struct detail::external_constructor;
+    friend ::nlohmann::json_pointer<basic_json>;
+
+    template<typename BasicJsonType, typename InputType>
+    friend class ::nlohmann::detail::parser;
+    friend ::nlohmann::detail::serializer<basic_json>;
+    template<typename BasicJsonType>
+    friend class ::nlohmann::detail::iter_impl;
+    template<typename BasicJsonType, typename CharType>
+    friend class ::nlohmann::detail::binary_writer;
+    template<typename BasicJsonType, typename InputType, typename SAX>
+    friend class ::nlohmann::detail::binary_reader;
+    template<typename BasicJsonType>
+    friend class ::nlohmann::detail::json_sax_dom_parser;
+    template<typename BasicJsonType>
+    friend class ::nlohmann::detail::json_sax_dom_callback_parser;
+    friend class ::nlohmann::detail::exception;
+
+    /// workaround type for MSVC
+    using basic_json_t = NLOHMANN_BASIC_JSON_TPL;
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    // convenience aliases for types residing in namespace detail;
+    using lexer = ::nlohmann::detail::lexer_base<basic_json>;
+
+    template<typename InputAdapterType>
+    static ::nlohmann::detail::parser<basic_json, InputAdapterType> parser(
+        InputAdapterType adapter,
+        detail::parser_callback_t<basic_json>cb = nullptr,
+        const bool allow_exceptions = true,
+        const bool ignore_comments = false
+                                 )
+    {
+        return ::nlohmann::detail::parser<basic_json, InputAdapterType>(std::move(adapter),
+                std::move(cb), allow_exceptions, ignore_comments);
+    }
+
+  private:
+    using primitive_iterator_t = ::nlohmann::detail::primitive_iterator_t;
+    template<typename BasicJsonType>
+    using internal_iterator = ::nlohmann::detail::internal_iterator<BasicJsonType>;
+    template<typename BasicJsonType>
+    using iter_impl = ::nlohmann::detail::iter_impl<BasicJsonType>;
+    template<typename Iterator>
+    using iteration_proxy = ::nlohmann::detail::iteration_proxy<Iterator>;
+    template<typename Base> using json_reverse_iterator = ::nlohmann::detail::json_reverse_iterator<Base>;
+
+    template<typename CharType>
+    using output_adapter_t = ::nlohmann::detail::output_adapter_t<CharType>;
+
+    template<typename InputType>
+    using binary_reader = ::nlohmann::detail::binary_reader<basic_json, InputType>;
+    template<typename CharType> using binary_writer = ::nlohmann::detail::binary_writer<basic_json, CharType>;
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    using serializer = ::nlohmann::detail::serializer<basic_json>;
+
+  public:
+    using value_t = detail::value_t;
+    /// JSON Pointer, see @ref nlohmann::json_pointer
+    using json_pointer = ::nlohmann::json_pointer<basic_json>;
+    template<typename T, typename SFINAE>
+    using json_serializer = JSONSerializer<T, SFINAE>;
+    /// how to treat decoding errors
+    using error_handler_t = detail::error_handler_t;
+    /// how to treat CBOR tags
+    using cbor_tag_handler_t = detail::cbor_tag_handler_t;
+    /// helper type for initializer lists of basic_json values
+    using initializer_list_t = std::initializer_list<detail::json_ref<basic_json>>;
+
+    using input_format_t = detail::input_format_t;
+    /// SAX interface type, see @ref nlohmann::json_sax
+    using json_sax_t = json_sax<basic_json>;
+
+    ////////////////
+    // exceptions //
+    ////////////////
+
+    /// @name exceptions
+    /// Classes to implement user-defined exceptions.
+    /// @{
+
+    /// @copydoc detail::exception
+    using exception = detail::exception;
+    /// @copydoc detail::parse_error
+    using parse_error = detail::parse_error;
+    /// @copydoc detail::invalid_iterator
+    using invalid_iterator = detail::invalid_iterator;
+    /// @copydoc detail::type_error
+    using type_error = detail::type_error;
+    /// @copydoc detail::out_of_range
+    using out_of_range = detail::out_of_range;
+    /// @copydoc detail::other_error
+    using other_error = detail::other_error;
+
+    /// @}
+
+
+    /////////////////////
+    // container types //
+    /////////////////////
+
+    /// @name container types
+    /// The canonic container types to use @ref basic_json like any other STL
+    /// container.
+    /// @{
+
+    /// the type of elements in a basic_json container
+    using value_type = basic_json;
+
+    /// the type of an element reference
+    using reference = value_type&;
+    /// the type of an element const reference
+    using const_reference = const value_type&;
+
+    /// a type to represent differences between iterators
+    using difference_type = std::ptrdiff_t;
+    /// a type to represent container sizes
+    using size_type = std::size_t;
+
+    /// the allocator type
+    using allocator_type = AllocatorType<basic_json>;
+
+    /// the type of an element pointer
+    using pointer = typename std::allocator_traits<allocator_type>::pointer;
+    /// the type of an element const pointer
+    using const_pointer = typename std::allocator_traits<allocator_type>::const_pointer;
+
+    /// an iterator for a basic_json container
+    using iterator = iter_impl<basic_json>;
+    /// a const iterator for a basic_json container
+    using const_iterator = iter_impl<const basic_json>;
+    /// a reverse iterator for a basic_json container
+    using reverse_iterator = json_reverse_iterator<typename basic_json::iterator>;
+    /// a const reverse iterator for a basic_json container
+    using const_reverse_iterator = json_reverse_iterator<typename basic_json::const_iterator>;
+
+    /// @}
+
+
+    /*!
+    @brief returns the allocator associated with the container
+    */
+    static allocator_type get_allocator()
+    {
+        return allocator_type();
+    }
+
+    /*!
+    @brief returns version information on the library
+
+    This function returns a JSON object with information about the library,
+    including the version number and information on the platform and compiler.
+
+    @return JSON object holding version information
+    key         | description
+    ----------- | ---------------
+    `compiler`  | Information on the used compiler. It is an object with the following keys: `c++` (the used C++ standard), `family` (the compiler family; possible values are `clang`, `icc`, `gcc`, `ilecpp`, `msvc`, `pgcpp`, `sunpro`, and `unknown`), and `version` (the compiler version).
+    `copyright` | The copyright line for the library as string.
+    `name`      | The name of the library as string.
+    `platform`  | The used platform as string. Possible values are `win32`, `linux`, `apple`, `unix`, and `unknown`.
+    `url`       | The URL of the project as string.
+    `version`   | The version of the library. It is an object with the following keys: `major`, `minor`, and `patch` as defined by [Semantic Versioning](http://semver.org), and `string` (the version string).
+
+    @liveexample{The following code shows an example output of the `meta()`
+    function.,meta}
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @complexity Constant.
+
+    @since 2.1.0
+    */
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json meta()
+    {
+        basic_json result;
+
+        result["copyright"] = "(C) 2013-2021 Niels Lohmann";
+        result["name"] = "JSON for Modern C++";
+        result["url"] = "https://github.com/nlohmann/json";
+        result["version"]["string"] =
+            std::to_string(NLOHMANN_JSON_VERSION_MAJOR) + "." +
+            std::to_string(NLOHMANN_JSON_VERSION_MINOR) + "." +
+            std::to_string(NLOHMANN_JSON_VERSION_PATCH);
+        result["version"]["major"] = NLOHMANN_JSON_VERSION_MAJOR;
+        result["version"]["minor"] = NLOHMANN_JSON_VERSION_MINOR;
+        result["version"]["patch"] = NLOHMANN_JSON_VERSION_PATCH;
+
+#ifdef _WIN32
+        result["platform"] = "win32";
+#elif defined __linux__
+        result["platform"] = "linux";
+#elif defined __APPLE__
+        result["platform"] = "apple";
+#elif defined __unix__
+        result["platform"] = "unix";
+#else
+        result["platform"] = "unknown";
+#endif
+
+#if defined(__ICC) || defined(__INTEL_COMPILER)
+        result["compiler"] = {{"family", "icc"}, {"version", __INTEL_COMPILER}};
+#elif defined(__clang__)
+        result["compiler"] = {{"family", "clang"}, {"version", __clang_version__}};
+#elif defined(__GNUC__) || defined(__GNUG__)
+        result["compiler"] = {{"family", "gcc"}, {"version", std::to_string(__GNUC__) + "." + std::to_string(__GNUC_MINOR__) + "." + std::to_string(__GNUC_PATCHLEVEL__)}};
+#elif defined(__HP_cc) || defined(__HP_aCC)
+        result["compiler"] = "hp"
+#elif defined(__IBMCPP__)
+        result["compiler"] = {{"family", "ilecpp"}, {"version", __IBMCPP__}};
+#elif defined(_MSC_VER)
+        result["compiler"] = {{"family", "msvc"}, {"version", _MSC_VER}};
+#elif defined(__PGI)
+        result["compiler"] = {{"family", "pgcpp"}, {"version", __PGI}};
+#elif defined(__SUNPRO_CC)
+        result["compiler"] = {{"family", "sunpro"}, {"version", __SUNPRO_CC}};
+#else
+        result["compiler"] = {{"family", "unknown"}, {"version", "unknown"}};
+#endif
+
+#ifdef __cplusplus
+        result["compiler"]["c++"] = std::to_string(__cplusplus);
+#else
+        result["compiler"]["c++"] = "unknown";
+#endif
+        return result;
+    }
+
+
+    ///////////////////////////
+    // JSON value data types //
+    ///////////////////////////
+
+    /// @name JSON value data types
+    /// The data types to store a JSON value. These types are derived from
+    /// the template arguments passed to class @ref basic_json.
+    /// @{
+
+#if defined(JSON_HAS_CPP_14)
+    // Use transparent comparator if possible, combined with perfect forwarding
+    // on find() and count() calls prevents unnecessary string construction.
+    using object_comparator_t = std::less<>;
+#else
+    using object_comparator_t = std::less<StringType>;
+#endif
+
+    /*!
+    @brief a type for an object
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) describes JSON objects as follows:
+    > An object is an unordered collection of zero or more name/value pairs,
+    > where a name is a string and a value is a string, number, boolean, null,
+    > object, or array.
+
+    To store objects in C++, a type is defined by the template parameters
+    described below.
+
+    @tparam ObjectType  the container to store objects (e.g., `std::map` or
+    `std::unordered_map`)
+    @tparam StringType the type of the keys or names (e.g., `std::string`).
+    The comparison function `std::less<StringType>` is used to order elements
+    inside the container.
+    @tparam AllocatorType the allocator to use for objects (e.g.,
+    `std::allocator`)
+
+    #### Default type
+
+    With the default values for @a ObjectType (`std::map`), @a StringType
+    (`std::string`), and @a AllocatorType (`std::allocator`), the default
+    value for @a object_t is:
+
+    @code {.cpp}
+    std::map<
+      std::string, // key_type
+      basic_json, // value_type
+      std::less<std::string>, // key_compare
+      std::allocator<std::pair<const std::string, basic_json>> // allocator_type
+    >
+    @endcode
+
+    #### Behavior
+
+    The choice of @a object_t influences the behavior of the JSON class. With
+    the default type, objects have the following behavior:
+
+    - When all names are unique, objects will be interoperable in the sense
+      that all software implementations receiving that object will agree on
+      the name-value mappings.
+    - When the names within an object are not unique, it is unspecified which
+      one of the values for a given key will be chosen. For instance,
+      `{"key": 2, "key": 1}` could be equal to either `{"key": 1}` or
+      `{"key": 2}`.
+    - Internally, name/value pairs are stored in lexicographical order of the
+      names. Objects will also be serialized (see @ref dump) in this order.
+      For instance, `{"b": 1, "a": 2}` and `{"a": 2, "b": 1}` will be stored
+      and serialized as `{"a": 2, "b": 1}`.
+    - When comparing objects, the order of the name/value pairs is irrelevant.
+      This makes objects interoperable in the sense that they will not be
+      affected by these differences. For instance, `{"b": 1, "a": 2}` and
+      `{"a": 2, "b": 1}` will be treated as equal.
+
+    #### Limits
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) specifies:
+    > An implementation may set limits on the maximum depth of nesting.
+
+    In this class, the object's limit of nesting is not explicitly constrained.
+    However, a maximum depth of nesting may be introduced by the compiler or
+    runtime environment. A theoretical limit can be queried by calling the
+    @ref max_size function of a JSON object.
+
+    #### Storage
+
+    Objects are stored as pointers in a @ref basic_json type. That is, for any
+    access to object values, a pointer of type `object_t*` must be
+    dereferenced.
+
+    @sa see @ref array_t -- type for an array value
+
+    @since version 1.0.0
+
+    @note The order name/value pairs are added to the object is *not*
+    preserved by the library. Therefore, iterating an object may return
+    name/value pairs in a different order than they were originally stored. In
+    fact, keys will be traversed in alphabetical order as `std::map` with
+    `std::less` is used by default. Please note this behavior conforms to [RFC
+    8259](https://tools.ietf.org/html/rfc8259), because any order implements the
+    specified "unordered" nature of JSON objects.
+    */
+    using object_t = ObjectType<StringType,
+          basic_json,
+          object_comparator_t,
+          AllocatorType<std::pair<const StringType,
+          basic_json>>>;
+
+    /*!
+    @brief a type for an array
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) describes JSON arrays as follows:
+    > An array is an ordered sequence of zero or more values.
+
+    To store objects in C++, a type is defined by the template parameters
+    explained below.
+
+    @tparam ArrayType  container type to store arrays (e.g., `std::vector` or
+    `std::list`)
+    @tparam AllocatorType allocator to use for arrays (e.g., `std::allocator`)
+
+    #### Default type
+
+    With the default values for @a ArrayType (`std::vector`) and @a
+    AllocatorType (`std::allocator`), the default value for @a array_t is:
+
+    @code {.cpp}
+    std::vector<
+      basic_json, // value_type
+      std::allocator<basic_json> // allocator_type
+    >
+    @endcode
+
+    #### Limits
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) specifies:
+    > An implementation may set limits on the maximum depth of nesting.
+
+    In this class, the array's limit of nesting is not explicitly constrained.
+    However, a maximum depth of nesting may be introduced by the compiler or
+    runtime environment. A theoretical limit can be queried by calling the
+    @ref max_size function of a JSON array.
+
+    #### Storage
+
+    Arrays are stored as pointers in a @ref basic_json type. That is, for any
+    access to array values, a pointer of type `array_t*` must be dereferenced.
+
+    @sa see @ref object_t -- type for an object value
+
+    @since version 1.0.0
+    */
+    using array_t = ArrayType<basic_json, AllocatorType<basic_json>>;
+
+    /*!
+    @brief a type for a string
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) describes JSON strings as follows:
+    > A string is a sequence of zero or more Unicode characters.
+
+    To store objects in C++, a type is defined by the template parameter
+    described below. Unicode values are split by the JSON class into
+    byte-sized characters during deserialization.
+
+    @tparam StringType  the container to store strings (e.g., `std::string`).
+    Note this container is used for keys/names in objects, see @ref object_t.
+
+    #### Default type
+
+    With the default values for @a StringType (`std::string`), the default
+    value for @a string_t is:
+
+    @code {.cpp}
+    std::string
+    @endcode
+
+    #### Encoding
+
+    Strings are stored in UTF-8 encoding. Therefore, functions like
+    `std::string::size()` or `std::string::length()` return the number of
+    bytes in the string rather than the number of characters or glyphs.
+
+    #### String comparison
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) states:
+    > Software implementations are typically required to test names of object
+    > members for equality. Implementations that transform the textual
+    > representation into sequences of Unicode code units and then perform the
+    > comparison numerically, code unit by code unit, are interoperable in the
+    > sense that implementations will agree in all cases on equality or
+    > inequality of two strings. For example, implementations that compare
+    > strings with escaped characters unconverted may incorrectly find that
+    > `"a\\b"` and `"a\u005Cb"` are not equal.
+
+    This implementation is interoperable as it does compare strings code unit
+    by code unit.
+
+    #### Storage
+
+    String values are stored as pointers in a @ref basic_json type. That is,
+    for any access to string values, a pointer of type `string_t*` must be
+    dereferenced.
+
+    @since version 1.0.0
+    */
+    using string_t = StringType;
+
+    /*!
+    @brief a type for a boolean
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) implicitly describes a boolean as a
+    type which differentiates the two literals `true` and `false`.
+
+    To store objects in C++, a type is defined by the template parameter @a
+    BooleanType which chooses the type to use.
+
+    #### Default type
+
+    With the default values for @a BooleanType (`bool`), the default value for
+    @a boolean_t is:
+
+    @code {.cpp}
+    bool
+    @endcode
+
+    #### Storage
+
+    Boolean values are stored directly inside a @ref basic_json type.
+
+    @since version 1.0.0
+    */
+    using boolean_t = BooleanType;
+
+    /*!
+    @brief a type for a number (integer)
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) describes numbers as follows:
+    > The representation of numbers is similar to that used in most
+    > programming languages. A number is represented in base 10 using decimal
+    > digits. It contains an integer component that may be prefixed with an
+    > optional minus sign, which may be followed by a fraction part and/or an
+    > exponent part. Leading zeros are not allowed. (...) Numeric values that
+    > cannot be represented in the grammar below (such as Infinity and NaN)
+    > are not permitted.
+
+    This description includes both integer and floating-point numbers.
+    However, C++ allows more precise storage if it is known whether the number
+    is a signed integer, an unsigned integer or a floating-point number.
+    Therefore, three different types, @ref number_integer_t, @ref
+    number_unsigned_t and @ref number_float_t are used.
+
+    To store integer numbers in C++, a type is defined by the template
+    parameter @a NumberIntegerType which chooses the type to use.
+
+    #### Default type
+
+    With the default values for @a NumberIntegerType (`int64_t`), the default
+    value for @a number_integer_t is:
+
+    @code {.cpp}
+    int64_t
+    @endcode
+
+    #### Default behavior
+
+    - The restrictions about leading zeros is not enforced in C++. Instead,
+      leading zeros in integer literals lead to an interpretation as octal
+      number. Internally, the value will be stored as decimal number. For
+      instance, the C++ integer literal `010` will be serialized to `8`.
+      During deserialization, leading zeros yield an error.
+    - Not-a-number (NaN) values will be serialized to `null`.
+
+    #### Limits
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) specifies:
+    > An implementation may set limits on the range and precision of numbers.
+
+    When the default type is used, the maximal integer number that can be
+    stored is `9223372036854775807` (INT64_MAX) and the minimal integer number
+    that can be stored is `-9223372036854775808` (INT64_MIN). Integer numbers
+    that are out of range will yield over/underflow when used in a
+    constructor. During deserialization, too large or small integer numbers
+    will be automatically be stored as @ref number_unsigned_t or @ref
+    number_float_t.
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
+    > Note that when such software is used, numbers that are integers and are
+    > in the range \f$[-2^{53}+1, 2^{53}-1]\f$ are interoperable in the sense
+    > that implementations will agree exactly on their numeric values.
+
+    As this range is a subrange of the exactly supported range [INT64_MIN,
+    INT64_MAX], this class's integer type is interoperable.
+
+    #### Storage
+
+    Integer number values are stored directly inside a @ref basic_json type.
+
+    @sa see @ref number_float_t -- type for number values (floating-point)
+
+    @sa see @ref number_unsigned_t -- type for number values (unsigned integer)
+
+    @since version 1.0.0
+    */
+    using number_integer_t = NumberIntegerType;
+
+    /*!
+    @brief a type for a number (unsigned)
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) describes numbers as follows:
+    > The representation of numbers is similar to that used in most
+    > programming languages. A number is represented in base 10 using decimal
+    > digits. It contains an integer component that may be prefixed with an
+    > optional minus sign, which may be followed by a fraction part and/or an
+    > exponent part. Leading zeros are not allowed. (...) Numeric values that
+    > cannot be represented in the grammar below (such as Infinity and NaN)
+    > are not permitted.
+
+    This description includes both integer and floating-point numbers.
+    However, C++ allows more precise storage if it is known whether the number
+    is a signed integer, an unsigned integer or a floating-point number.
+    Therefore, three different types, @ref number_integer_t, @ref
+    number_unsigned_t and @ref number_float_t are used.
+
+    To store unsigned integer numbers in C++, a type is defined by the
+    template parameter @a NumberUnsignedType which chooses the type to use.
+
+    #### Default type
+
+    With the default values for @a NumberUnsignedType (`uint64_t`), the
+    default value for @a number_unsigned_t is:
+
+    @code {.cpp}
+    uint64_t
+    @endcode
+
+    #### Default behavior
+
+    - The restrictions about leading zeros is not enforced in C++. Instead,
+      leading zeros in integer literals lead to an interpretation as octal
+      number. Internally, the value will be stored as decimal number. For
+      instance, the C++ integer literal `010` will be serialized to `8`.
+      During deserialization, leading zeros yield an error.
+    - Not-a-number (NaN) values will be serialized to `null`.
+
+    #### Limits
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) specifies:
+    > An implementation may set limits on the range and precision of numbers.
+
+    When the default type is used, the maximal integer number that can be
+    stored is `18446744073709551615` (UINT64_MAX) and the minimal integer
+    number that can be stored is `0`. Integer numbers that are out of range
+    will yield over/underflow when used in a constructor. During
+    deserialization, too large or small integer numbers will be automatically
+    be stored as @ref number_integer_t or @ref number_float_t.
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
+    > Note that when such software is used, numbers that are integers and are
+    > in the range \f$[-2^{53}+1, 2^{53}-1]\f$ are interoperable in the sense
+    > that implementations will agree exactly on their numeric values.
+
+    As this range is a subrange (when considered in conjunction with the
+    number_integer_t type) of the exactly supported range [0, UINT64_MAX],
+    this class's integer type is interoperable.
+
+    #### Storage
+
+    Integer number values are stored directly inside a @ref basic_json type.
+
+    @sa see @ref number_float_t -- type for number values (floating-point)
+    @sa see @ref number_integer_t -- type for number values (integer)
+
+    @since version 2.0.0
+    */
+    using number_unsigned_t = NumberUnsignedType;
+
+    /*!
+    @brief a type for a number (floating-point)
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) describes numbers as follows:
+    > The representation of numbers is similar to that used in most
+    > programming languages. A number is represented in base 10 using decimal
+    > digits. It contains an integer component that may be prefixed with an
+    > optional minus sign, which may be followed by a fraction part and/or an
+    > exponent part. Leading zeros are not allowed. (...) Numeric values that
+    > cannot be represented in the grammar below (such as Infinity and NaN)
+    > are not permitted.
+
+    This description includes both integer and floating-point numbers.
+    However, C++ allows more precise storage if it is known whether the number
+    is a signed integer, an unsigned integer or a floating-point number.
+    Therefore, three different types, @ref number_integer_t, @ref
+    number_unsigned_t and @ref number_float_t are used.
+
+    To store floating-point numbers in C++, a type is defined by the template
+    parameter @a NumberFloatType which chooses the type to use.
+
+    #### Default type
+
+    With the default values for @a NumberFloatType (`double`), the default
+    value for @a number_float_t is:
+
+    @code {.cpp}
+    double
+    @endcode
+
+    #### Default behavior
+
+    - The restrictions about leading zeros is not enforced in C++. Instead,
+      leading zeros in floating-point literals will be ignored. Internally,
+      the value will be stored as decimal number. For instance, the C++
+      floating-point literal `01.2` will be serialized to `1.2`. During
+      deserialization, leading zeros yield an error.
+    - Not-a-number (NaN) values will be serialized to `null`.
+
+    #### Limits
+
+    [RFC 8259](https://tools.ietf.org/html/rfc8259) states:
+    > This specification allows implementations to set limits on the range and
+    > precision of numbers accepted. Since software that implements IEEE
+    > 754-2008 binary64 (double precision) numbers is generally available and
+    > widely used, good interoperability can be achieved by implementations
+    > that expect no more precision or range than these provide, in the sense
+    > that implementations will approximate JSON numbers within the expected
+    > precision.
+
+    This implementation does exactly follow this approach, as it uses double
+    precision floating-point numbers. Note values smaller than
+    `-1.79769313486232e+308` and values greater than `1.79769313486232e+308`
+    will be stored as NaN internally and be serialized to `null`.
+
+    #### Storage
+
+    Floating-point number values are stored directly inside a @ref basic_json
+    type.
+
+    @sa see @ref number_integer_t -- type for number values (integer)
+
+    @sa see @ref number_unsigned_t -- type for number values (unsigned integer)
+
+    @since version 1.0.0
+    */
+    using number_float_t = NumberFloatType;
+
+    /*!
+    @brief a type for a packed binary type
+
+    This type is a type designed to carry binary data that appears in various
+    serialized formats, such as CBOR's Major Type 2, MessagePack's bin, and
+    BSON's generic binary subtype. This type is NOT a part of standard JSON and
+    exists solely for compatibility with these binary types. As such, it is
+    simply defined as an ordered sequence of zero or more byte values.
+
+    Additionally, as an implementation detail, the subtype of the binary data is
+    carried around as a `std::uint8_t`, which is compatible with both of the
+    binary data formats that use binary subtyping, (though the specific
+    numbering is incompatible with each other, and it is up to the user to
+    translate between them).
+
+    [CBOR's RFC 7049](https://tools.ietf.org/html/rfc7049) describes this type
+    as:
+    > Major type 2: a byte string. The string's length in bytes is represented
+    > following the rules for positive integers (major type 0).
+
+    [MessagePack's documentation on the bin type
+    family](https://github.com/msgpack/msgpack/blob/master/spec.md#bin-format-family)
+    describes this type as:
+    > Bin format family stores an byte array in 2, 3, or 5 bytes of extra bytes
+    > in addition to the size of the byte array.
+
+    [BSON's specifications](http://bsonspec.org/spec.html) describe several
+    binary types; however, this type is intended to represent the generic binary
+    type which has the description:
+    > Generic binary subtype - This is the most commonly used binary subtype and
+    > should be the 'default' for drivers and tools.
+
+    None of these impose any limitations on the internal representation other
+    than the basic unit of storage be some type of array whose parts are
+    decomposable into bytes.
+
+    The default representation of this binary format is a
+    `std::vector<std::uint8_t>`, which is a very common way to represent a byte
+    array in modern C++.
+
+    #### Default type
+
+    The default values for @a BinaryType is `std::vector<std::uint8_t>`
+
+    #### Storage
+
+    Binary Arrays are stored as pointers in a @ref basic_json type. That is,
+    for any access to array values, a pointer of the type `binary_t*` must be
+    dereferenced.
+
+    #### Notes on subtypes
+
+    - CBOR
+       - Binary values are represented as byte strings. Subtypes are serialized
+         as tagged values.
+    - MessagePack
+       - If a subtype is given and the binary array contains exactly 1, 2, 4, 8,
+         or 16 elements, the fixext family (fixext1, fixext2, fixext4, fixext8)
+         is used. For other sizes, the ext family (ext8, ext16, ext32) is used.
+         The subtype is then added as singed 8-bit integer.
+       - If no subtype is given, the bin family (bin8, bin16, bin32) is used.
+    - BSON
+       - If a subtype is given, it is used and added as unsigned 8-bit integer.
+       - If no subtype is given, the generic binary subtype 0x00 is used.
+
+    @sa see @ref binary -- create a binary array
+
+    @since version 3.8.0
+    */
+    using binary_t = nlohmann::byte_container_with_subtype<BinaryType>;
+    /// @}
+
+  private:
+
+    /// helper for exception-safe object creation
+    template<typename T, typename... Args>
+    JSON_HEDLEY_RETURNS_NON_NULL
+    static T* create(Args&& ... args)
+    {
+        AllocatorType<T> alloc;
+        using AllocatorTraits = std::allocator_traits<AllocatorType<T>>;
+
+        auto deleter = [&](T * obj)
+        {
+            AllocatorTraits::deallocate(alloc, obj, 1);
+        };
+        std::unique_ptr<T, decltype(deleter)> obj(AllocatorTraits::allocate(alloc, 1), deleter);
+        AllocatorTraits::construct(alloc, obj.get(), std::forward<Args>(args)...);
+        JSON_ASSERT(obj != nullptr);
+        return obj.release();
+    }
+
+    ////////////////////////
+    // JSON value storage //
+    ////////////////////////
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    /*!
+    @brief a JSON value
+
+    The actual storage for a JSON value of the @ref basic_json class. This
+    union combines the different storage types for the JSON value types
+    defined in @ref value_t.
+
+    JSON type | value_t type    | used type
+    --------- | --------------- | ------------------------
+    object    | object          | pointer to @ref object_t
+    array     | array           | pointer to @ref array_t
+    string    | string          | pointer to @ref string_t
+    boolean   | boolean         | @ref boolean_t
+    number    | number_integer  | @ref number_integer_t
+    number    | number_unsigned | @ref number_unsigned_t
+    number    | number_float    | @ref number_float_t
+    binary    | binary          | pointer to @ref binary_t
+    null      | null            | *no value is stored*
+
+    @note Variable-length types (objects, arrays, and strings) are stored as
+    pointers. The size of the union should not exceed 64 bits if the default
+    value types are used.
+
+    @since version 1.0.0
+    */
+    union json_value
+    {
+        /// object (stored with pointer to save storage)
+        object_t* object;
+        /// array (stored with pointer to save storage)
+        array_t* array;
+        /// string (stored with pointer to save storage)
+        string_t* string;
+        /// binary (stored with pointer to save storage)
+        binary_t* binary;
+        /// boolean
+        boolean_t boolean;
+        /// number (integer)
+        number_integer_t number_integer;
+        /// number (unsigned integer)
+        number_unsigned_t number_unsigned;
+        /// number (floating-point)
+        number_float_t number_float;
+
+        /// default constructor (for null values)
+        json_value() = default;
+        /// constructor for booleans
+        json_value(boolean_t v) noexcept : boolean(v) {}
+        /// constructor for numbers (integer)
+        json_value(number_integer_t v) noexcept : number_integer(v) {}
+        /// constructor for numbers (unsigned)
+        json_value(number_unsigned_t v) noexcept : number_unsigned(v) {}
+        /// constructor for numbers (floating-point)
+        json_value(number_float_t v) noexcept : number_float(v) {}
+        /// constructor for empty values of a given type
+        json_value(value_t t)
+        {
+            switch (t)
+            {
+                case value_t::object:
+                {
+                    object = create<object_t>();
+                    break;
+                }
+
+                case value_t::array:
+                {
+                    array = create<array_t>();
+                    break;
+                }
+
+                case value_t::string:
+                {
+                    string = create<string_t>("");
+                    break;
+                }
+
+                case value_t::binary:
+                {
+                    binary = create<binary_t>();
+                    break;
+                }
+
+                case value_t::boolean:
+                {
+                    boolean = boolean_t(false);
+                    break;
+                }
+
+                case value_t::number_integer:
+                {
+                    number_integer = number_integer_t(0);
+                    break;
+                }
+
+                case value_t::number_unsigned:
+                {
+                    number_unsigned = number_unsigned_t(0);
+                    break;
+                }
+
+                case value_t::number_float:
+                {
+                    number_float = number_float_t(0.0);
+                    break;
+                }
+
+                case value_t::null:
+                {
+                    object = nullptr;  // silence warning, see #821
+                    break;
+                }
+
+                case value_t::discarded:
+                default:
+                {
+                    object = nullptr;  // silence warning, see #821
+                    if (JSON_HEDLEY_UNLIKELY(t == value_t::null))
+                    {
+                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.10.4", basic_json())); // LCOV_EXCL_LINE
+                    }
+                    break;
+                }
+            }
+        }
+
+        /// constructor for strings
+        json_value(const string_t& value)
+        {
+            string = create<string_t>(value);
+        }
+
+        /// constructor for rvalue strings
+        json_value(string_t&& value)
+        {
+            string = create<string_t>(std::move(value));
+        }
+
+        /// constructor for objects
+        json_value(const object_t& value)
+        {
+            object = create<object_t>(value);
+        }
+
+        /// constructor for rvalue objects
+        json_value(object_t&& value)
+        {
+            object = create<object_t>(std::move(value));
+        }
+
+        /// constructor for arrays
+        json_value(const array_t& value)
+        {
+            array = create<array_t>(value);
+        }
+
+        /// constructor for rvalue arrays
+        json_value(array_t&& value)
+        {
+            array = create<array_t>(std::move(value));
+        }
+
+        /// constructor for binary arrays
+        json_value(const typename binary_t::container_type& value)
+        {
+            binary = create<binary_t>(value);
+        }
+
+        /// constructor for rvalue binary arrays
+        json_value(typename binary_t::container_type&& value)
+        {
+            binary = create<binary_t>(std::move(value));
+        }
+
+        /// constructor for binary arrays (internal type)
+        json_value(const binary_t& value)
+        {
+            binary = create<binary_t>(value);
+        }
+
+        /// constructor for rvalue binary arrays (internal type)
+        json_value(binary_t&& value)
+        {
+            binary = create<binary_t>(std::move(value));
+        }
+
+        void destroy(value_t t)
+        {
+            if (t == value_t::array || t == value_t::object)
+            {
+                // flatten the current json_value to a heap-allocated stack
+                std::vector<basic_json> stack;
+
+                // move the top-level items to stack
+                if (t == value_t::array)
+                {
+                    stack.reserve(array->size());
+                    std::move(array->begin(), array->end(), std::back_inserter(stack));
+                }
+                else
+                {
+                    stack.reserve(object->size());
+                    for (auto&& it : *object)
+                    {
+                        stack.push_back(std::move(it.second));
+                    }
+                }
+
+                while (!stack.empty())
+                {
+                    // move the last item to local variable to be processed
+                    basic_json current_item(std::move(stack.back()));
+                    stack.pop_back();
+
+                    // if current_item is array/object, move
+                    // its children to the stack to be processed later
+                    if (current_item.is_array())
+                    {
+                        std::move(current_item.m_value.array->begin(), current_item.m_value.array->end(), std::back_inserter(stack));
+
+                        current_item.m_value.array->clear();
+                    }
+                    else if (current_item.is_object())
+                    {
+                        for (auto&& it : *current_item.m_value.object)
+                        {
+                            stack.push_back(std::move(it.second));
+                        }
+
+                        current_item.m_value.object->clear();
+                    }
+
+                    // it's now safe that current_item get destructed
+                    // since it doesn't have any children
+                }
+            }
+
+            switch (t)
+            {
+                case value_t::object:
+                {
+                    AllocatorType<object_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, object);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, object, 1);
+                    break;
+                }
+
+                case value_t::array:
+                {
+                    AllocatorType<array_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, array);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, array, 1);
+                    break;
+                }
+
+                case value_t::string:
+                {
+                    AllocatorType<string_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, string);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, string, 1);
+                    break;
+                }
+
+                case value_t::binary:
+                {
+                    AllocatorType<binary_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, binary);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, binary, 1);
+                    break;
+                }
+
+                case value_t::null:
+                case value_t::boolean:
+                case value_t::number_integer:
+                case value_t::number_unsigned:
+                case value_t::number_float:
+                case value_t::discarded:
+                default:
+                {
+                    break;
+                }
+            }
+        }
+    };
+
+  private:
+    /*!
+    @brief checks the class invariants
+
+    This function asserts the class invariants. It needs to be called at the
+    end of every constructor to make sure that created objects respect the
+    invariant. Furthermore, it has to be called each time the type of a JSON
+    value is changed, because the invariant expresses a relationship between
+    @a m_type and @a m_value.
+
+    Furthermore, the parent relation is checked for arrays and objects: If
+    @a check_parents true and the value is an array or object, then the
+    container's elements must have the current value as parent.
+
+    @param[in] check_parents  whether the parent relation should be checked.
+               The value is true by default and should only be set to false
+               during destruction of objects when the invariant does not
+               need to hold.
+    */
+    void assert_invariant(bool check_parents = true) const noexcept
+    {
+        JSON_ASSERT(m_type != value_t::object || m_value.object != nullptr);
+        JSON_ASSERT(m_type != value_t::array || m_value.array != nullptr);
+        JSON_ASSERT(m_type != value_t::string || m_value.string != nullptr);
+        JSON_ASSERT(m_type != value_t::binary || m_value.binary != nullptr);
+
+#if JSON_DIAGNOSTICS
+        JSON_TRY
+        {
+            // cppcheck-suppress assertWithSideEffect
+            JSON_ASSERT(!check_parents || !is_structured() || std::all_of(begin(), end(), [this](const basic_json & j)
+            {
+                return j.m_parent == this;
+            }));
+        }
+        JSON_CATCH(...) {} // LCOV_EXCL_LINE
+#endif
+        static_cast<void>(check_parents);
+    }
+
+    void set_parents()
+    {
+#if JSON_DIAGNOSTICS
+        switch (m_type)
+        {
+            case value_t::array:
+            {
+                for (auto& element : *m_value.array)
+                {
+                    element.m_parent = this;
+                }
+                break;
+            }
+
+            case value_t::object:
+            {
+                for (auto& element : *m_value.object)
+                {
+                    element.second.m_parent = this;
+                }
+                break;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+                break;
+        }
+#endif
+    }
+
+    iterator set_parents(iterator it, typename iterator::difference_type count)
+    {
+#if JSON_DIAGNOSTICS
+        for (typename iterator::difference_type i = 0; i < count; ++i)
+        {
+            (it + i)->m_parent = this;
+        }
+#else
+        static_cast<void>(count);
+#endif
+        return it;
+    }
+
+    reference set_parent(reference j, std::size_t old_capacity = std::size_t(-1))
+    {
+#if JSON_DIAGNOSTICS
+        if (old_capacity != std::size_t(-1))
+        {
+            // see https://github.com/nlohmann/json/issues/2838
+            JSON_ASSERT(type() == value_t::array);
+            if (JSON_HEDLEY_UNLIKELY(m_value.array->capacity() != old_capacity))
+            {
+                // capacity has changed: update all parents
+                set_parents();
+                return j;
+            }
+        }
+
+        // ordered_json uses a vector internally, so pointers could have
+        // been invalidated; see https://github.com/nlohmann/json/issues/2962
+#ifdef JSON_HEDLEY_MSVC_VERSION
+#pragma warning(push )
+#pragma warning(disable : 4127) // ignore warning to replace if with if constexpr
+#endif
+        if (detail::is_ordered_map<object_t>::value)
+        {
+            set_parents();
+            return j;
+        }
+#ifdef JSON_HEDLEY_MSVC_VERSION
+#pragma warning( pop )
+#endif
+
+        j.m_parent = this;
+#else
+        static_cast<void>(j);
+        static_cast<void>(old_capacity);
+#endif
+        return j;
+    }
+
+  public:
+    //////////////////////////
+    // JSON parser callback //
+    //////////////////////////
+
+    /*!
+    @brief parser event types
+
+    The parser callback distinguishes the following events:
+    - `object_start`: the parser read `{` and started to process a JSON object
+    - `key`: the parser read a key of a value in an object
+    - `object_end`: the parser read `}` and finished processing a JSON object
+    - `array_start`: the parser read `[` and started to process a JSON array
+    - `array_end`: the parser read `]` and finished processing a JSON array
+    - `value`: the parser finished reading a JSON value
+
+    @image html callback_events.png "Example when certain parse events are triggered"
+
+    @sa see @ref parser_callback_t for more information and examples
+    */
+    using parse_event_t = detail::parse_event_t;
+
+    /*!
+    @brief per-element parser callback type
+
+    With a parser callback function, the result of parsing a JSON text can be
+    influenced. When passed to @ref parse, it is called on certain events
+    (passed as @ref parse_event_t via parameter @a event) with a set recursion
+    depth @a depth and context JSON value @a parsed. The return value of the
+    callback function is a boolean indicating whether the element that emitted
+    the callback shall be kept or not.
+
+    We distinguish six scenarios (determined by the event type) in which the
+    callback function can be called. The following table describes the values
+    of the parameters @a depth, @a event, and @a parsed.
+
+    parameter @a event | description | parameter @a depth | parameter @a parsed
+    ------------------ | ----------- | ------------------ | -------------------
+    parse_event_t::object_start | the parser read `{` and started to process a JSON object | depth of the parent of the JSON object | a JSON value with type discarded
+    parse_event_t::key | the parser read a key of a value in an object | depth of the currently parsed JSON object | a JSON string containing the key
+    parse_event_t::object_end | the parser read `}` and finished processing a JSON object | depth of the parent of the JSON object | the parsed JSON object
+    parse_event_t::array_start | the parser read `[` and started to process a JSON array | depth of the parent of the JSON array | a JSON value with type discarded
+    parse_event_t::array_end | the parser read `]` and finished processing a JSON array | depth of the parent of the JSON array | the parsed JSON array
+    parse_event_t::value | the parser finished reading a JSON value | depth of the value | the parsed JSON value
+
+    @image html callback_events.png "Example when certain parse events are triggered"
+
+    Discarding a value (i.e., returning `false`) has different effects
+    depending on the context in which function was called:
+
+    - Discarded values in structured types are skipped. That is, the parser
+      will behave as if the discarded value was never read.
+    - In case a value outside a structured type is skipped, it is replaced
+      with `null`. This case happens if the top-level element is skipped.
+
+    @param[in] depth  the depth of the recursion during parsing
+
+    @param[in] event  an event of type parse_event_t indicating the context in
+    the callback function has been called
+
+    @param[in,out] parsed  the current intermediate parse result; note that
+    writing to this value has no effect for parse_event_t::key events
+
+    @return Whether the JSON value which called the function during parsing
+    should be kept (`true`) or not (`false`). In the latter case, it is either
+    skipped completely or replaced by an empty discarded object.
+
+    @sa see @ref parse for examples
+
+    @since version 1.0.0
+    */
+    using parser_callback_t = detail::parser_callback_t<basic_json>;
+
+    //////////////////
+    // constructors //
+    //////////////////
+
+    /// @name constructors and destructors
+    /// Constructors of class @ref basic_json, copy/move constructor, copy
+    /// assignment, static functions creating objects, and the destructor.
+    /// @{
+
+    /*!
+    @brief create an empty value with a given type
+
+    Create an empty JSON value with a given type. The value will be default
+    initialized with an empty value which depends on the type:
+
+    Value type  | initial value
+    ----------- | -------------
+    null        | `null`
+    boolean     | `false`
+    string      | `""`
+    number      | `0`
+    object      | `{}`
+    array       | `[]`
+    binary      | empty array
+
+    @param[in] v  the type of the value to create
+
+    @complexity Constant.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @liveexample{The following code shows the constructor for different @ref
+    value_t values,basic_json__value_t}
+
+    @sa see @ref clear() -- restores the postcondition of this constructor
+
+    @since version 1.0.0
+    */
+    basic_json(const value_t v)
+        : m_type(v), m_value(v)
+    {
+        assert_invariant();
+    }
+
+    /*!
+    @brief create a null object
+
+    Create a `null` JSON value. It either takes a null pointer as parameter
+    (explicitly creating `null`) or no parameter (implicitly creating `null`).
+    The passed null pointer itself is not read -- it is only used to choose
+    the right constructor.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this constructor never throws
+    exceptions.
+
+    @liveexample{The following code shows the constructor with and without a
+    null pointer parameter.,basic_json__nullptr_t}
+
+    @since version 1.0.0
+    */
+    basic_json(std::nullptr_t = nullptr) noexcept
+        : basic_json(value_t::null)
+    {
+        assert_invariant();
+    }
+
+    /*!
+    @brief create a JSON value
+
+    This is a "catch all" constructor for all compatible JSON types; that is,
+    types for which a `to_json()` method exists. The constructor forwards the
+    parameter @a val to that method (to `json_serializer<U>::to_json` method
+    with `U = uncvref_t<CompatibleType>`, to be exact).
+
+    Template type @a CompatibleType includes, but is not limited to, the
+    following types:
+    - **arrays**: @ref array_t and all kinds of compatible containers such as
+      `std::vector`, `std::deque`, `std::list`, `std::forward_list`,
+      `std::array`, `std::valarray`, `std::set`, `std::unordered_set`,
+      `std::multiset`, and `std::unordered_multiset` with a `value_type` from
+      which a @ref basic_json value can be constructed.
+    - **objects**: @ref object_t and all kinds of compatible associative
+      containers such as `std::map`, `std::unordered_map`, `std::multimap`,
+      and `std::unordered_multimap` with a `key_type` compatible to
+      @ref string_t and a `value_type` from which a @ref basic_json value can
+      be constructed.
+    - **strings**: @ref string_t, string literals, and all compatible string
+      containers can be used.
+    - **numbers**: @ref number_integer_t, @ref number_unsigned_t,
+      @ref number_float_t, and all convertible number types such as `int`,
+      `size_t`, `int64_t`, `float` or `double` can be used.
+    - **boolean**: @ref boolean_t / `bool` can be used.
+    - **binary**: @ref binary_t / `std::vector<std::uint8_t>` may be used,
+      unfortunately because string literals cannot be distinguished from binary
+      character arrays by the C++ type system, all types compatible with `const
+      char*` will be directed to the string constructor instead.  This is both
+      for backwards compatibility, and due to the fact that a binary type is not
+      a standard JSON type.
+
+    See the examples below.
+
+    @tparam CompatibleType a type such that:
+    - @a CompatibleType is not derived from `std::istream`,
+    - @a CompatibleType is not @ref basic_json (to avoid hijacking copy/move
+         constructors),
+    - @a CompatibleType is not a different @ref basic_json type (i.e. with different template arguments)
+    - @a CompatibleType is not a @ref basic_json nested type (e.g.,
+         @ref json_pointer, @ref iterator, etc ...)
+    - `json_serializer<U>` has a `to_json(basic_json_t&, CompatibleType&&)` method
+
+    @tparam U = `uncvref_t<CompatibleType>`
+
+    @param[in] val the value to be forwarded to the respective constructor
+
+    @complexity Usually linear in the size of the passed @a val, also
+                depending on the implementation of the called `to_json()`
+                method.
+
+    @exceptionsafety Depends on the called constructor. For types directly
+    supported by the library (i.e., all types for which no `to_json()` function
+    was provided), strong guarantee holds: if an exception is thrown, there are
+    no changes to any JSON value.
+
+    @liveexample{The following code shows the constructor with several
+    compatible types.,basic_json__CompatibleType}
+
+    @since version 2.1.0
+    */
+    template < typename CompatibleType,
+               typename U = detail::uncvref_t<CompatibleType>,
+               detail::enable_if_t <
+                   !detail::is_basic_json<U>::value && detail::is_compatible_type<basic_json_t, U>::value, int > = 0 >
+    basic_json(CompatibleType && val) noexcept(noexcept( // NOLINT(bugprone-forwarding-reference-overload,bugprone-exception-escape)
+                JSONSerializer<U>::to_json(std::declval<basic_json_t&>(),
+                                           std::forward<CompatibleType>(val))))
+    {
+        JSONSerializer<U>::to_json(*this, std::forward<CompatibleType>(val));
+        set_parents();
+        assert_invariant();
+    }
+
+    /*!
+    @brief create a JSON value from an existing one
+
+    This is a constructor for existing @ref basic_json types.
+    It does not hijack copy/move constructors, since the parameter has different
+    template arguments than the current ones.
+
+    The constructor tries to convert the internal @ref m_value of the parameter.
+
+    @tparam BasicJsonType a type such that:
+    - @a BasicJsonType is a @ref basic_json type.
+    - @a BasicJsonType has different template arguments than @ref basic_json_t.
+
+    @param[in] val the @ref basic_json value to be converted.
+
+    @complexity Usually linear in the size of the passed @a val, also
+                depending on the implementation of the called `to_json()`
+                method.
+
+    @exceptionsafety Depends on the called constructor. For types directly
+    supported by the library (i.e., all types for which no `to_json()` function
+    was provided), strong guarantee holds: if an exception is thrown, there are
+    no changes to any JSON value.
+
+    @since version 3.2.0
+    */
+    template < typename BasicJsonType,
+               detail::enable_if_t <
+                   detail::is_basic_json<BasicJsonType>::value&& !std::is_same<basic_json, BasicJsonType>::value, int > = 0 >
+    basic_json(const BasicJsonType& val)
+    {
+        using other_boolean_t = typename BasicJsonType::boolean_t;
+        using other_number_float_t = typename BasicJsonType::number_float_t;
+        using other_number_integer_t = typename BasicJsonType::number_integer_t;
+        using other_number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+        using other_string_t = typename BasicJsonType::string_t;
+        using other_object_t = typename BasicJsonType::object_t;
+        using other_array_t = typename BasicJsonType::array_t;
+        using other_binary_t = typename BasicJsonType::binary_t;
+
+        switch (val.type())
+        {
+            case value_t::boolean:
+                JSONSerializer<other_boolean_t>::to_json(*this, val.template get<other_boolean_t>());
+                break;
+            case value_t::number_float:
+                JSONSerializer<other_number_float_t>::to_json(*this, val.template get<other_number_float_t>());
+                break;
+            case value_t::number_integer:
+                JSONSerializer<other_number_integer_t>::to_json(*this, val.template get<other_number_integer_t>());
+                break;
+            case value_t::number_unsigned:
+                JSONSerializer<other_number_unsigned_t>::to_json(*this, val.template get<other_number_unsigned_t>());
+                break;
+            case value_t::string:
+                JSONSerializer<other_string_t>::to_json(*this, val.template get_ref<const other_string_t&>());
+                break;
+            case value_t::object:
+                JSONSerializer<other_object_t>::to_json(*this, val.template get_ref<const other_object_t&>());
+                break;
+            case value_t::array:
+                JSONSerializer<other_array_t>::to_json(*this, val.template get_ref<const other_array_t&>());
+                break;
+            case value_t::binary:
+                JSONSerializer<other_binary_t>::to_json(*this, val.template get_ref<const other_binary_t&>());
+                break;
+            case value_t::null:
+                *this = nullptr;
+                break;
+            case value_t::discarded:
+                m_type = value_t::discarded;
+                break;
+            default:            // LCOV_EXCL_LINE
+                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+        }
+        set_parents();
+        assert_invariant();
+    }
+
+    /*!
+    @brief create a container (array or object) from an initializer list
+
+    Creates a JSON value of type array or object from the passed initializer
+    list @a init. In case @a type_deduction is `true` (default), the type of
+    the JSON value to be created is deducted from the initializer list @a init
+    according to the following rules:
+
+    1. If the list is empty, an empty JSON object value `{}` is created.
+    2. If the list consists of pairs whose first element is a string, a JSON
+       object value is created where the first elements of the pairs are
+       treated as keys and the second elements are as values.
+    3. In all other cases, an array is created.
+
+    The rules aim to create the best fit between a C++ initializer list and
+    JSON values. The rationale is as follows:
+
+    1. The empty initializer list is written as `{}` which is exactly an empty
+       JSON object.
+    2. C++ has no way of describing mapped types other than to list a list of
+       pairs. As JSON requires that keys must be of type string, rule 2 is the
+       weakest constraint one can pose on initializer lists to interpret them
+       as an object.
+    3. In all other cases, the initializer list could not be interpreted as
+       JSON object type, so interpreting it as JSON array type is safe.
+
+    With the rules described above, the following JSON values cannot be
+    expressed by an initializer list:
+
+    - the empty array (`[]`): use @ref array(initializer_list_t)
+      with an empty initializer list in this case
+    - arrays whose elements satisfy rule 2: use @ref
+      array(initializer_list_t) with the same initializer list
+      in this case
+
+    @note When used without parentheses around an empty initializer list, @ref
+    basic_json() is called instead of this function, yielding the JSON null
+    value.
+
+    @param[in] init  initializer list with JSON values
+
+    @param[in] type_deduction internal parameter; when set to `true`, the type
+    of the JSON value is deducted from the initializer list @a init; when set
+    to `false`, the type provided via @a manual_type is forced. This mode is
+    used by the functions @ref array(initializer_list_t) and
+    @ref object(initializer_list_t).
+
+    @param[in] manual_type internal parameter; when @a type_deduction is set
+    to `false`, the created JSON value will use the provided type (only @ref
+    value_t::array and @ref value_t::object are valid); when @a type_deduction
+    is set to `true`, this parameter has no effect
+
+    @throw type_error.301 if @a type_deduction is `false`, @a manual_type is
+    `value_t::object`, but @a init contains an element which is not a pair
+    whose first element is a string. In this case, the constructor could not
+    create an object. If @a type_deduction would have be `true`, an array
+    would have been created. See @ref object(initializer_list_t)
+    for an example.
+
+    @complexity Linear in the size of the initializer list @a init.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @liveexample{The example below shows how JSON values are created from
+    initializer lists.,basic_json__list_init_t}
+
+    @sa see @ref array(initializer_list_t) -- create a JSON array
+    value from an initializer list
+    @sa see @ref object(initializer_list_t) -- create a JSON object
+    value from an initializer list
+
+    @since version 1.0.0
+    */
+    basic_json(initializer_list_t init,
+               bool type_deduction = true,
+               value_t manual_type = value_t::array)
+    {
+        // check if each element is an array with two elements whose first
+        // element is a string
+        bool is_an_object = std::all_of(init.begin(), init.end(),
+                                        [](const detail::json_ref<basic_json>& element_ref)
+        {
+            return element_ref->is_array() && element_ref->size() == 2 && (*element_ref)[0].is_string();
+        });
+
+        // adjust type if type deduction is not wanted
+        if (!type_deduction)
+        {
+            // if array is wanted, do not create an object though possible
+            if (manual_type == value_t::array)
+            {
+                is_an_object = false;
+            }
+
+            // if object is wanted but impossible, throw an exception
+            if (JSON_HEDLEY_UNLIKELY(manual_type == value_t::object && !is_an_object))
+            {
+                JSON_THROW(type_error::create(301, "cannot create object from initializer list", basic_json()));
+            }
+        }
+
+        if (is_an_object)
+        {
+            // the initializer list is a list of pairs -> create object
+            m_type = value_t::object;
+            m_value = value_t::object;
+
+            for (auto& element_ref : init)
+            {
+                auto element = element_ref.moved_or_copied();
+                m_value.object->emplace(
+                    std::move(*((*element.m_value.array)[0].m_value.string)),
+                    std::move((*element.m_value.array)[1]));
+            }
+        }
+        else
+        {
+            // the initializer list describes an array -> create array
+            m_type = value_t::array;
+            m_value.array = create<array_t>(init.begin(), init.end());
+        }
+
+        set_parents();
+        assert_invariant();
+    }
+
+    /*!
+    @brief explicitly create a binary array (without subtype)
+
+    Creates a JSON binary array value from a given binary container. Binary
+    values are part of various binary formats, such as CBOR, MessagePack, and
+    BSON. This constructor is used to create a value for serialization to those
+    formats.
+
+    @note Note, this function exists because of the difficulty in correctly
+    specifying the correct template overload in the standard value ctor, as both
+    JSON arrays and JSON binary arrays are backed with some form of a
+    `std::vector`. Because JSON binary arrays are a non-standard extension it
+    was decided that it would be best to prevent automatic initialization of a
+    binary array type, for backwards compatibility and so it does not happen on
+    accident.
+
+    @param[in] init container containing bytes to use as binary type
+
+    @return JSON binary array value
+
+    @complexity Linear in the size of @a init.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @since version 3.8.0
+    */
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json binary(const typename binary_t::container_type& init)
+    {
+        auto res = basic_json();
+        res.m_type = value_t::binary;
+        res.m_value = init;
+        return res;
+    }
+
+    /*!
+    @brief explicitly create a binary array (with subtype)
+
+    Creates a JSON binary array value from a given binary container. Binary
+    values are part of various binary formats, such as CBOR, MessagePack, and
+    BSON. This constructor is used to create a value for serialization to those
+    formats.
+
+    @note Note, this function exists because of the difficulty in correctly
+    specifying the correct template overload in the standard value ctor, as both
+    JSON arrays and JSON binary arrays are backed with some form of a
+    `std::vector`. Because JSON binary arrays are a non-standard extension it
+    was decided that it would be best to prevent automatic initialization of a
+    binary array type, for backwards compatibility and so it does not happen on
+    accident.
+
+    @param[in] init container containing bytes to use as binary type
+    @param[in] subtype subtype to use in MessagePack and BSON
+
+    @return JSON binary array value
+
+    @complexity Linear in the size of @a init.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @since version 3.8.0
+    */
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json binary(const typename binary_t::container_type& init, typename binary_t::subtype_type subtype)
+    {
+        auto res = basic_json();
+        res.m_type = value_t::binary;
+        res.m_value = binary_t(init, subtype);
+        return res;
+    }
+
+    /// @copydoc binary(const typename binary_t::container_type&)
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json binary(typename binary_t::container_type&& init)
+    {
+        auto res = basic_json();
+        res.m_type = value_t::binary;
+        res.m_value = std::move(init);
+        return res;
+    }
+
+    /// @copydoc binary(const typename binary_t::container_type&, typename binary_t::subtype_type)
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json binary(typename binary_t::container_type&& init, typename binary_t::subtype_type subtype)
+    {
+        auto res = basic_json();
+        res.m_type = value_t::binary;
+        res.m_value = binary_t(std::move(init), subtype);
+        return res;
+    }
+
+    /*!
+    @brief explicitly create an array from an initializer list
+
+    Creates a JSON array value from a given initializer list. That is, given a
+    list of values `a, b, c`, creates the JSON value `[a, b, c]`. If the
+    initializer list is empty, the empty array `[]` is created.
+
+    @note This function is only needed to express two edge cases that cannot
+    be realized with the initializer list constructor (@ref
+    basic_json(initializer_list_t, bool, value_t)). These cases
+    are:
+    1. creating an array whose elements are all pairs whose first element is a
+    string -- in this case, the initializer list constructor would create an
+    object, taking the first elements as keys
+    2. creating an empty array -- passing the empty initializer list to the
+    initializer list constructor yields an empty object
+
+    @param[in] init  initializer list with JSON values to create an array from
+    (optional)
+
+    @return JSON array value
+
+    @complexity Linear in the size of @a init.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @liveexample{The following code shows an example for the `array`
+    function.,array}
+
+    @sa see @ref basic_json(initializer_list_t, bool, value_t) --
+    create a JSON value from an initializer list
+    @sa see @ref object(initializer_list_t) -- create a JSON object
+    value from an initializer list
+
+    @since version 1.0.0
+    */
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json array(initializer_list_t init = {})
+    {
+        return basic_json(init, false, value_t::array);
+    }
+
+    /*!
+    @brief explicitly create an object from an initializer list
+
+    Creates a JSON object value from a given initializer list. The initializer
+    lists elements must be pairs, and their first elements must be strings. If
+    the initializer list is empty, the empty object `{}` is created.
+
+    @note This function is only added for symmetry reasons. In contrast to the
+    related function @ref array(initializer_list_t), there are
+    no cases which can only be expressed by this function. That is, any
+    initializer list @a init can also be passed to the initializer list
+    constructor @ref basic_json(initializer_list_t, bool, value_t).
+
+    @param[in] init  initializer list to create an object from (optional)
+
+    @return JSON object value
+
+    @throw type_error.301 if @a init is not a list of pairs whose first
+    elements are strings. In this case, no object can be created. When such a
+    value is passed to @ref basic_json(initializer_list_t, bool, value_t),
+    an array would have been created from the passed initializer list @a init.
+    See example below.
+
+    @complexity Linear in the size of @a init.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @liveexample{The following code shows an example for the `object`
+    function.,object}
+
+    @sa see @ref basic_json(initializer_list_t, bool, value_t) --
+    create a JSON value from an initializer list
+    @sa see @ref array(initializer_list_t) -- create a JSON array
+    value from an initializer list
+
+    @since version 1.0.0
+    */
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json object(initializer_list_t init = {})
+    {
+        return basic_json(init, false, value_t::object);
+    }
+
+    /*!
+    @brief construct an array with count copies of given value
+
+    Constructs a JSON array value by creating @a cnt copies of a passed value.
+    In case @a cnt is `0`, an empty array is created.
+
+    @param[in] cnt  the number of JSON copies of @a val to create
+    @param[in] val  the JSON value to copy
+
+    @post `std::distance(begin(),end()) == cnt` holds.
+
+    @complexity Linear in @a cnt.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @liveexample{The following code shows examples for the @ref
+    basic_json(size_type\, const basic_json&)
+    constructor.,basic_json__size_type_basic_json}
+
+    @since version 1.0.0
+    */
+    basic_json(size_type cnt, const basic_json& val)
+        : m_type(value_t::array)
+    {
+        m_value.array = create<array_t>(cnt, val);
+        set_parents();
+        assert_invariant();
+    }
+
+    /*!
+    @brief construct a JSON container given an iterator range
+
+    Constructs the JSON value with the contents of the range `[first, last)`.
+    The semantics depends on the different types a JSON value can have:
+    - In case of a null type, invalid_iterator.206 is thrown.
+    - In case of other primitive types (number, boolean, or string), @a first
+      must be `begin()` and @a last must be `end()`. In this case, the value is
+      copied. Otherwise, invalid_iterator.204 is thrown.
+    - In case of structured types (array, object), the constructor behaves as
+      similar versions for `std::vector` or `std::map`; that is, a JSON array
+      or object is constructed from the values in the range.
+
+    @tparam InputIT an input iterator type (@ref iterator or @ref
+    const_iterator)
+
+    @param[in] first begin of the range to copy from (included)
+    @param[in] last end of the range to copy from (excluded)
+
+    @pre Iterators @a first and @a last must be initialized. **This
+         precondition is enforced with an assertion (see warning).** If
+         assertions are switched off, a violation of this precondition yields
+         undefined behavior.
+
+    @pre Range `[first, last)` is valid. Usually, this precondition cannot be
+         checked efficiently. Only certain edge cases are detected; see the
+         description of the exceptions below. A violation of this precondition
+         yields undefined behavior.
+
+    @warning A precondition is enforced with a runtime assertion that will
+             result in calling `std::abort` if this precondition is not met.
+             Assertions can be disabled by defining `NDEBUG` at compile time.
+             See https://en.cppreference.com/w/cpp/error/assert for more
+             information.
+
+    @throw invalid_iterator.201 if iterators @a first and @a last are not
+    compatible (i.e., do not belong to the same JSON value). In this case,
+    the range `[first, last)` is undefined.
+    @throw invalid_iterator.204 if iterators @a first and @a last belong to a
+    primitive type (number, boolean, or string), but @a first does not point
+    to the first element any more. In this case, the range `[first, last)` is
+    undefined. See example code below.
+    @throw invalid_iterator.206 if iterators @a first and @a last belong to a
+    null value. In this case, the range `[first, last)` is undefined.
+
+    @complexity Linear in distance between @a first and @a last.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @liveexample{The example below shows several ways to create JSON values by
+    specifying a subrange with iterators.,basic_json__InputIt_InputIt}
+
+    @since version 1.0.0
+    */
+    template < class InputIT, typename std::enable_if <
+                   std::is_same<InputIT, typename basic_json_t::iterator>::value ||
+                   std::is_same<InputIT, typename basic_json_t::const_iterator>::value, int >::type = 0 >
+    basic_json(InputIT first, InputIT last)
+    {
+        JSON_ASSERT(first.m_object != nullptr);
+        JSON_ASSERT(last.m_object != nullptr);
+
+        // make sure iterator fits the current value
+        if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(201, "iterators are not compatible", basic_json()));
+        }
+
+        // copy type from first iterator
+        m_type = first.m_object->m_type;
+
+        // check if iterator range is complete for primitive values
+        switch (m_type)
+        {
+            case value_t::boolean:
+            case value_t::number_float:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::string:
+            {
+                if (JSON_HEDLEY_UNLIKELY(!first.m_it.primitive_iterator.is_begin()
+                                         || !last.m_it.primitive_iterator.is_end()))
+                {
+                    JSON_THROW(invalid_iterator::create(204, "iterators out of range", *first.m_object));
+                }
+                break;
+            }
+
+            case value_t::null:
+            case value_t::object:
+            case value_t::array:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+                break;
+        }
+
+        switch (m_type)
+        {
+            case value_t::number_integer:
+            {
+                m_value.number_integer = first.m_object->m_value.number_integer;
+                break;
+            }
+
+            case value_t::number_unsigned:
+            {
+                m_value.number_unsigned = first.m_object->m_value.number_unsigned;
+                break;
+            }
+
+            case value_t::number_float:
+            {
+                m_value.number_float = first.m_object->m_value.number_float;
+                break;
+            }
+
+            case value_t::boolean:
+            {
+                m_value.boolean = first.m_object->m_value.boolean;
+                break;
+            }
+
+            case value_t::string:
+            {
+                m_value = *first.m_object->m_value.string;
+                break;
+            }
+
+            case value_t::object:
+            {
+                m_value.object = create<object_t>(first.m_it.object_iterator,
+                                                  last.m_it.object_iterator);
+                break;
+            }
+
+            case value_t::array:
+            {
+                m_value.array = create<array_t>(first.m_it.array_iterator,
+                                                last.m_it.array_iterator);
+                break;
+            }
+
+            case value_t::binary:
+            {
+                m_value = *first.m_object->m_value.binary;
+                break;
+            }
+
+            case value_t::null:
+            case value_t::discarded:
+            default:
+                JSON_THROW(invalid_iterator::create(206, "cannot construct with iterators from " + std::string(first.m_object->type_name()), *first.m_object));
+        }
+
+        set_parents();
+        assert_invariant();
+    }
+
+
+    ///////////////////////////////////////
+    // other constructors and destructor //
+    ///////////////////////////////////////
+
+    template<typename JsonRef,
+             detail::enable_if_t<detail::conjunction<detail::is_json_ref<JsonRef>,
+                                 std::is_same<typename JsonRef::value_type, basic_json>>::value, int> = 0 >
+    basic_json(const JsonRef& ref) : basic_json(ref.moved_or_copied()) {}
+
+    /*!
+    @brief copy constructor
+
+    Creates a copy of a given JSON value.
+
+    @param[in] other  the JSON value to copy
+
+    @post `*this == other`
+
+    @complexity Linear in the size of @a other.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes to any JSON value.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is linear.
+    - As postcondition, it holds: `other == basic_json(other)`.
+
+    @liveexample{The following code shows an example for the copy
+    constructor.,basic_json__basic_json}
+
+    @since version 1.0.0
+    */
+    basic_json(const basic_json& other)
+        : m_type(other.m_type)
+    {
+        // check of passed value is valid
+        other.assert_invariant();
+
+        switch (m_type)
+        {
+            case value_t::object:
+            {
+                m_value = *other.m_value.object;
+                break;
+            }
+
+            case value_t::array:
+            {
+                m_value = *other.m_value.array;
+                break;
+            }
+
+            case value_t::string:
+            {
+                m_value = *other.m_value.string;
+                break;
+            }
+
+            case value_t::boolean:
+            {
+                m_value = other.m_value.boolean;
+                break;
+            }
+
+            case value_t::number_integer:
+            {
+                m_value = other.m_value.number_integer;
+                break;
+            }
+
+            case value_t::number_unsigned:
+            {
+                m_value = other.m_value.number_unsigned;
+                break;
+            }
+
+            case value_t::number_float:
+            {
+                m_value = other.m_value.number_float;
+                break;
+            }
+
+            case value_t::binary:
+            {
+                m_value = *other.m_value.binary;
+                break;
+            }
+
+            case value_t::null:
+            case value_t::discarded:
+            default:
+                break;
+        }
+
+        set_parents();
+        assert_invariant();
+    }
+
+    /*!
+    @brief move constructor
+
+    Move constructor. Constructs a JSON value with the contents of the given
+    value @a other using move semantics. It "steals" the resources from @a
+    other and leaves it as JSON null value.
+
+    @param[in,out] other  value to move to this object
+
+    @post `*this` has the same value as @a other before the call.
+    @post @a other is a JSON null value.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this constructor never throws
+    exceptions.
+
+    @requirement This function helps `basic_json` satisfying the
+    [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible)
+    requirements.
+
+    @liveexample{The code below shows the move constructor explicitly called
+    via std::move.,basic_json__moveconstructor}
+
+    @since version 1.0.0
+    */
+    basic_json(basic_json&& other) noexcept
+        : m_type(std::move(other.m_type)),
+          m_value(std::move(other.m_value))
+    {
+        // check that passed value is valid
+        other.assert_invariant(false);
+
+        // invalidate payload
+        other.m_type = value_t::null;
+        other.m_value = {};
+
+        set_parents();
+        assert_invariant();
+    }
+
+    /*!
+    @brief copy assignment
+
+    Copy assignment operator. Copies a JSON value via the "copy and swap"
+    strategy: It is expressed in terms of the copy constructor, destructor,
+    and the `swap()` member function.
+
+    @param[in] other  value to copy from
+
+    @complexity Linear.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is linear.
+
+    @liveexample{The code below shows and example for the copy assignment. It
+    creates a copy of value `a` which is then swapped with `b`. Finally\, the
+    copy of `a` (which is the null value after the swap) is
+    destroyed.,basic_json__copyassignment}
+
+    @since version 1.0.0
+    */
+    basic_json& operator=(basic_json other) noexcept (
+        std::is_nothrow_move_constructible<value_t>::value&&
+        std::is_nothrow_move_assignable<value_t>::value&&
+        std::is_nothrow_move_constructible<json_value>::value&&
+        std::is_nothrow_move_assignable<json_value>::value
+    )
+    {
+        // check that passed value is valid
+        other.assert_invariant();
+
+        using std::swap;
+        swap(m_type, other.m_type);
+        swap(m_value, other.m_value);
+
+        set_parents();
+        assert_invariant();
+        return *this;
+    }
+
+    /*!
+    @brief destructor
+
+    Destroys the JSON value and frees all allocated memory.
+
+    @complexity Linear.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is linear.
+    - All stored elements are destroyed and all memory is freed.
+
+    @since version 1.0.0
+    */
+    ~basic_json() noexcept
+    {
+        assert_invariant(false);
+        m_value.destroy(m_type);
+    }
+
+    /// @}
+
+  public:
+    ///////////////////////
+    // object inspection //
+    ///////////////////////
+
+    /// @name object inspection
+    /// Functions to inspect the type of a JSON value.
+    /// @{
+
+    /*!
+    @brief serialization
+
+    Serialization function for JSON values. The function tries to mimic
+    Python's `json.dumps()` function, and currently supports its @a indent
+    and @a ensure_ascii parameters.
+
+    @param[in] indent If indent is nonnegative, then array elements and object
+    members will be pretty-printed with that indent level. An indent level of
+    `0` will only insert newlines. `-1` (the default) selects the most compact
+    representation.
+    @param[in] indent_char The character to use for indentation if @a indent is
+    greater than `0`. The default is ` ` (space).
+    @param[in] ensure_ascii If @a ensure_ascii is true, all non-ASCII characters
+    in the output are escaped with `\uXXXX` sequences, and the result consists
+    of ASCII characters only.
+    @param[in] error_handler  how to react on decoding errors; there are three
+    possible values: `strict` (throws and exception in case a decoding error
+    occurs; default), `replace` (replace invalid UTF-8 sequences with U+FFFD),
+    and `ignore` (ignore invalid UTF-8 sequences during serialization; all
+    bytes are copied to the output unchanged).
+
+    @return string containing the serialization of the JSON value
+
+    @throw type_error.316 if a string stored inside the JSON value is not
+                          UTF-8 encoded and @a error_handler is set to strict
+
+    @note Binary values are serialized as object containing two keys:
+      - "bytes": an array of bytes as integers
+      - "subtype": the subtype as integer or "null" if the binary has no subtype
+
+    @complexity Linear.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @liveexample{The following example shows the effect of different @a indent\,
+    @a indent_char\, and @a ensure_ascii parameters to the result of the
+    serialization.,dump}
+
+    @see https://docs.python.org/2/library/json.html#json.dump
+
+    @since version 1.0.0; indentation character @a indent_char, option
+           @a ensure_ascii and exceptions added in version 3.0.0; error
+           handlers added in version 3.4.0; serialization of binary values added
+           in version 3.8.0.
+    */
+    string_t dump(const int indent = -1,
+                  const char indent_char = ' ',
+                  const bool ensure_ascii = false,
+                  const error_handler_t error_handler = error_handler_t::strict) const
+    {
+        string_t result;
+        serializer s(detail::output_adapter<char, string_t>(result), indent_char, error_handler);
+
+        if (indent >= 0)
+        {
+            s.dump(*this, true, ensure_ascii, static_cast<unsigned int>(indent));
+        }
+        else
+        {
+            s.dump(*this, false, ensure_ascii, 0);
+        }
+
+        return result;
+    }
+
+    /*!
+    @brief return the type of the JSON value (explicit)
+
+    Return the type of the JSON value as a value from the @ref value_t
+    enumeration.
+
+    @return the type of the JSON value
+            Value type                | return value
+            ------------------------- | -------------------------
+            null                      | value_t::null
+            boolean                   | value_t::boolean
+            string                    | value_t::string
+            number (integer)          | value_t::number_integer
+            number (unsigned integer) | value_t::number_unsigned
+            number (floating-point)   | value_t::number_float
+            object                    | value_t::object
+            array                     | value_t::array
+            binary                    | value_t::binary
+            discarded                 | value_t::discarded
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `type()` for all JSON
+    types.,type}
+
+    @sa see @ref operator value_t() -- return the type of the JSON value (implicit)
+    @sa see @ref type_name() -- return the type as string
+
+    @since version 1.0.0
+    */
+    constexpr value_t type() const noexcept
+    {
+        return m_type;
+    }
+
+    /*!
+    @brief return whether type is primitive
+
+    This function returns true if and only if the JSON type is primitive
+    (string, number, boolean, or null).
+
+    @return `true` if type is primitive (string, number, boolean, or null),
+    `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_primitive()` for all JSON
+    types.,is_primitive}
+
+    @sa see @ref is_structured() -- returns whether JSON value is structured
+    @sa see @ref is_null() -- returns whether JSON value is `null`
+    @sa see @ref is_string() -- returns whether JSON value is a string
+    @sa see @ref is_boolean() -- returns whether JSON value is a boolean
+    @sa see @ref is_number() -- returns whether JSON value is a number
+    @sa see @ref is_binary() -- returns whether JSON value is a binary array
+
+    @since version 1.0.0
+    */
+    constexpr bool is_primitive() const noexcept
+    {
+        return is_null() || is_string() || is_boolean() || is_number() || is_binary();
+    }
+
+    /*!
+    @brief return whether type is structured
+
+    This function returns true if and only if the JSON type is structured
+    (array or object).
+
+    @return `true` if type is structured (array or object), `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_structured()` for all JSON
+    types.,is_structured}
+
+    @sa see @ref is_primitive() -- returns whether value is primitive
+    @sa see @ref is_array() -- returns whether value is an array
+    @sa see @ref is_object() -- returns whether value is an object
+
+    @since version 1.0.0
+    */
+    constexpr bool is_structured() const noexcept
+    {
+        return is_array() || is_object();
+    }
+
+    /*!
+    @brief return whether value is null
+
+    This function returns true if and only if the JSON value is null.
+
+    @return `true` if type is null, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_null()` for all JSON
+    types.,is_null}
+
+    @since version 1.0.0
+    */
+    constexpr bool is_null() const noexcept
+    {
+        return m_type == value_t::null;
+    }
+
+    /*!
+    @brief return whether value is a boolean
+
+    This function returns true if and only if the JSON value is a boolean.
+
+    @return `true` if type is boolean, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_boolean()` for all JSON
+    types.,is_boolean}
+
+    @since version 1.0.0
+    */
+    constexpr bool is_boolean() const noexcept
+    {
+        return m_type == value_t::boolean;
+    }
+
+    /*!
+    @brief return whether value is a number
+
+    This function returns true if and only if the JSON value is a number. This
+    includes both integer (signed and unsigned) and floating-point values.
+
+    @return `true` if type is number (regardless whether integer, unsigned
+    integer or floating-type), `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_number()` for all JSON
+    types.,is_number}
+
+    @sa see @ref is_number_integer() -- check if value is an integer or unsigned
+    integer number
+    @sa see @ref is_number_unsigned() -- check if value is an unsigned integer
+    number
+    @sa see @ref is_number_float() -- check if value is a floating-point number
+
+    @since version 1.0.0
+    */
+    constexpr bool is_number() const noexcept
+    {
+        return is_number_integer() || is_number_float();
+    }
+
+    /*!
+    @brief return whether value is an integer number
+
+    This function returns true if and only if the JSON value is a signed or
+    unsigned integer number. This excludes floating-point values.
+
+    @return `true` if type is an integer or unsigned integer number, `false`
+    otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_number_integer()` for all
+    JSON types.,is_number_integer}
+
+    @sa see @ref is_number() -- check if value is a number
+    @sa see @ref is_number_unsigned() -- check if value is an unsigned integer
+    number
+    @sa see @ref is_number_float() -- check if value is a floating-point number
+
+    @since version 1.0.0
+    */
+    constexpr bool is_number_integer() const noexcept
+    {
+        return m_type == value_t::number_integer || m_type == value_t::number_unsigned;
+    }
+
+    /*!
+    @brief return whether value is an unsigned integer number
+
+    This function returns true if and only if the JSON value is an unsigned
+    integer number. This excludes floating-point and signed integer values.
+
+    @return `true` if type is an unsigned integer number, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_number_unsigned()` for all
+    JSON types.,is_number_unsigned}
+
+    @sa see @ref is_number() -- check if value is a number
+    @sa see @ref is_number_integer() -- check if value is an integer or unsigned
+    integer number
+    @sa see @ref is_number_float() -- check if value is a floating-point number
+
+    @since version 2.0.0
+    */
+    constexpr bool is_number_unsigned() const noexcept
+    {
+        return m_type == value_t::number_unsigned;
+    }
+
+    /*!
+    @brief return whether value is a floating-point number
+
+    This function returns true if and only if the JSON value is a
+    floating-point number. This excludes signed and unsigned integer values.
+
+    @return `true` if type is a floating-point number, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_number_float()` for all
+    JSON types.,is_number_float}
+
+    @sa see @ref is_number() -- check if value is number
+    @sa see @ref is_number_integer() -- check if value is an integer number
+    @sa see @ref is_number_unsigned() -- check if value is an unsigned integer
+    number
+
+    @since version 1.0.0
+    */
+    constexpr bool is_number_float() const noexcept
+    {
+        return m_type == value_t::number_float;
+    }
+
+    /*!
+    @brief return whether value is an object
+
+    This function returns true if and only if the JSON value is an object.
+
+    @return `true` if type is object, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_object()` for all JSON
+    types.,is_object}
+
+    @since version 1.0.0
+    */
+    constexpr bool is_object() const noexcept
+    {
+        return m_type == value_t::object;
+    }
+
+    /*!
+    @brief return whether value is an array
+
+    This function returns true if and only if the JSON value is an array.
+
+    @return `true` if type is array, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_array()` for all JSON
+    types.,is_array}
+
+    @since version 1.0.0
+    */
+    constexpr bool is_array() const noexcept
+    {
+        return m_type == value_t::array;
+    }
+
+    /*!
+    @brief return whether value is a string
+
+    This function returns true if and only if the JSON value is a string.
+
+    @return `true` if type is string, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_string()` for all JSON
+    types.,is_string}
+
+    @since version 1.0.0
+    */
+    constexpr bool is_string() const noexcept
+    {
+        return m_type == value_t::string;
+    }
+
+    /*!
+    @brief return whether value is a binary array
+
+    This function returns true if and only if the JSON value is a binary array.
+
+    @return `true` if type is binary array, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_binary()` for all JSON
+    types.,is_binary}
+
+    @since version 3.8.0
+    */
+    constexpr bool is_binary() const noexcept
+    {
+        return m_type == value_t::binary;
+    }
+
+    /*!
+    @brief return whether value is discarded
+
+    This function returns true if and only if the JSON value was discarded
+    during parsing with a callback function (see @ref parser_callback_t).
+
+    @note This function will always be `false` for JSON values after parsing.
+    That is, discarded values can only occur during parsing, but will be
+    removed when inside a structured value or replaced by null in other cases.
+
+    @return `true` if type is discarded, `false` otherwise.
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies `is_discarded()` for all JSON
+    types.,is_discarded}
+
+    @since version 1.0.0
+    */
+    constexpr bool is_discarded() const noexcept
+    {
+        return m_type == value_t::discarded;
+    }
+
+    /*!
+    @brief return the type of the JSON value (implicit)
+
+    Implicitly return the type of the JSON value as a value from the @ref
+    value_t enumeration.
+
+    @return the type of the JSON value
+
+    @complexity Constant.
+
+    @exceptionsafety No-throw guarantee: this member function never throws
+    exceptions.
+
+    @liveexample{The following code exemplifies the @ref value_t operator for
+    all JSON types.,operator__value_t}
+
+    @sa see @ref type() -- return the type of the JSON value (explicit)
+    @sa see @ref type_name() -- return the type as string
+
+    @since version 1.0.0
+    */
+    constexpr operator value_t() const noexcept
+    {
+        return m_type;
+    }
+
+    /// @}
+
+  private:
+    //////////////////
+    // value access //
+    //////////////////
+
+    /// get a boolean (explicit)
+    boolean_t get_impl(boolean_t* /*unused*/) const
+    {
+        if (JSON_HEDLEY_LIKELY(is_boolean()))
+        {
+            return m_value.boolean;
+        }
+
+        JSON_THROW(type_error::create(302, "type must be boolean, but is " + std::string(type_name()), *this));
+    }
+
+    /// get a pointer to the value (object)
+    object_t* get_impl_ptr(object_t* /*unused*/) noexcept
+    {
+        return is_object() ? m_value.object : nullptr;
+    }
+
+    /// get a pointer to the value (object)
+    constexpr const object_t* get_impl_ptr(const object_t* /*unused*/) const noexcept
+    {
+        return is_object() ? m_value.object : nullptr;
+    }
+
+    /// get a pointer to the value (array)
+    array_t* get_impl_ptr(array_t* /*unused*/) noexcept
+    {
+        return is_array() ? m_value.array : nullptr;
+    }
+
+    /// get a pointer to the value (array)
+    constexpr const array_t* get_impl_ptr(const array_t* /*unused*/) const noexcept
+    {
+        return is_array() ? m_value.array : nullptr;
+    }
+
+    /// get a pointer to the value (string)
+    string_t* get_impl_ptr(string_t* /*unused*/) noexcept
+    {
+        return is_string() ? m_value.string : nullptr;
+    }
+
+    /// get a pointer to the value (string)
+    constexpr const string_t* get_impl_ptr(const string_t* /*unused*/) const noexcept
+    {
+        return is_string() ? m_value.string : nullptr;
+    }
+
+    /// get a pointer to the value (boolean)
+    boolean_t* get_impl_ptr(boolean_t* /*unused*/) noexcept
+    {
+        return is_boolean() ? &m_value.boolean : nullptr;
+    }
+
+    /// get a pointer to the value (boolean)
+    constexpr const boolean_t* get_impl_ptr(const boolean_t* /*unused*/) const noexcept
+    {
+        return is_boolean() ? &m_value.boolean : nullptr;
+    }
+
+    /// get a pointer to the value (integer number)
+    number_integer_t* get_impl_ptr(number_integer_t* /*unused*/) noexcept
+    {
+        return is_number_integer() ? &m_value.number_integer : nullptr;
+    }
+
+    /// get a pointer to the value (integer number)
+    constexpr const number_integer_t* get_impl_ptr(const number_integer_t* /*unused*/) const noexcept
+    {
+        return is_number_integer() ? &m_value.number_integer : nullptr;
+    }
+
+    /// get a pointer to the value (unsigned number)
+    number_unsigned_t* get_impl_ptr(number_unsigned_t* /*unused*/) noexcept
+    {
+        return is_number_unsigned() ? &m_value.number_unsigned : nullptr;
+    }
+
+    /// get a pointer to the value (unsigned number)
+    constexpr const number_unsigned_t* get_impl_ptr(const number_unsigned_t* /*unused*/) const noexcept
+    {
+        return is_number_unsigned() ? &m_value.number_unsigned : nullptr;
+    }
+
+    /// get a pointer to the value (floating-point number)
+    number_float_t* get_impl_ptr(number_float_t* /*unused*/) noexcept
+    {
+        return is_number_float() ? &m_value.number_float : nullptr;
+    }
+
+    /// get a pointer to the value (floating-point number)
+    constexpr const number_float_t* get_impl_ptr(const number_float_t* /*unused*/) const noexcept
+    {
+        return is_number_float() ? &m_value.number_float : nullptr;
+    }
+
+    /// get a pointer to the value (binary)
+    binary_t* get_impl_ptr(binary_t* /*unused*/) noexcept
+    {
+        return is_binary() ? m_value.binary : nullptr;
+    }
+
+    /// get a pointer to the value (binary)
+    constexpr const binary_t* get_impl_ptr(const binary_t* /*unused*/) const noexcept
+    {
+        return is_binary() ? m_value.binary : nullptr;
+    }
+
+    /*!
+    @brief helper function to implement get_ref()
+
+    This function helps to implement get_ref() without code duplication for
+    const and non-const overloads
+
+    @tparam ThisType will be deduced as `basic_json` or `const basic_json`
+
+    @throw type_error.303 if ReferenceType does not match underlying value
+    type of the current JSON
+    */
+    template<typename ReferenceType, typename ThisType>
+    static ReferenceType get_ref_impl(ThisType& obj)
+    {
+        // delegate the call to get_ptr<>()
+        auto* ptr = obj.template get_ptr<typename std::add_pointer<ReferenceType>::type>();
+
+        if (JSON_HEDLEY_LIKELY(ptr != nullptr))
+        {
+            return *ptr;
+        }
+
+        JSON_THROW(type_error::create(303, "incompatible ReferenceType for get_ref, actual type is " + std::string(obj.type_name()), obj));
+    }
+
+  public:
+    /// @name value access
+    /// Direct access to the stored value of a JSON value.
+    /// @{
+
+    /*!
+    @brief get a pointer value (implicit)
+
+    Implicit pointer access to the internally stored JSON value. No copies are
+    made.
+
+    @warning Writing data to the pointee of the result yields an undefined
+    state.
+
+    @tparam PointerType pointer type; must be a pointer to @ref array_t, @ref
+    object_t, @ref string_t, @ref boolean_t, @ref number_integer_t,
+    @ref number_unsigned_t, or @ref number_float_t. Enforced by a static
+    assertion.
+
+    @return pointer to the internally stored JSON value if the requested
+    pointer type @a PointerType fits to the JSON value; `nullptr` otherwise
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how pointers to internal values of a
+    JSON value can be requested. Note that no type conversions are made and a
+    `nullptr` is returned if the value and the requested pointer type does not
+    match.,get_ptr}
+
+    @since version 1.0.0
+    */
+    template<typename PointerType, typename std::enable_if<
+                 std::is_pointer<PointerType>::value, int>::type = 0>
+    auto get_ptr() noexcept -> decltype(std::declval<basic_json_t&>().get_impl_ptr(std::declval<PointerType>()))
+    {
+        // delegate the call to get_impl_ptr<>()
+        return get_impl_ptr(static_cast<PointerType>(nullptr));
+    }
+
+    /*!
+    @brief get a pointer value (implicit)
+    @copydoc get_ptr()
+    */
+    template < typename PointerType, typename std::enable_if <
+                   std::is_pointer<PointerType>::value&&
+                   std::is_const<typename std::remove_pointer<PointerType>::type>::value, int >::type = 0 >
+    constexpr auto get_ptr() const noexcept -> decltype(std::declval<const basic_json_t&>().get_impl_ptr(std::declval<PointerType>()))
+    {
+        // delegate the call to get_impl_ptr<>() const
+        return get_impl_ptr(static_cast<PointerType>(nullptr));
+    }
+
+  private:
+    /*!
+    @brief get a value (explicit)
+
+    Explicit type conversion between the JSON value and a compatible value
+    which is [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+    and [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
+    The value is converted by calling the @ref json_serializer<ValueType>
+    `from_json()` method.
+
+    The function is equivalent to executing
+    @code {.cpp}
+    ValueType ret;
+    JSONSerializer<ValueType>::from_json(*this, ret);
+    return ret;
+    @endcode
+
+    This overloads is chosen if:
+    - @a ValueType is not @ref basic_json,
+    - @ref json_serializer<ValueType> has a `from_json()` method of the form
+      `void from_json(const basic_json&, ValueType&)`, and
+    - @ref json_serializer<ValueType> does not have a `from_json()` method of
+      the form `ValueType from_json(const basic_json&)`
+
+    @tparam ValueType the returned value type
+
+    @return copy of the JSON value, converted to @a ValueType
+
+    @throw what @ref json_serializer<ValueType> `from_json()` method throws
+
+    @liveexample{The example below shows several conversions from JSON values
+    to other types. There a few things to note: (1) Floating-point numbers can
+    be converted to integers\, (2) A JSON array can be converted to a standard
+    `std::vector<short>`\, (3) A JSON object can be converted to C++
+    associative containers such as `std::unordered_map<std::string\,
+    json>`.,get__ValueType_const}
+
+    @since version 2.1.0
+    */
+    template < typename ValueType,
+               detail::enable_if_t <
+                   detail::is_default_constructible<ValueType>::value&&
+                   detail::has_from_json<basic_json_t, ValueType>::value,
+                   int > = 0 >
+    ValueType get_impl(detail::priority_tag<0> /*unused*/) const noexcept(noexcept(
+                JSONSerializer<ValueType>::from_json(std::declval<const basic_json_t&>(), std::declval<ValueType&>())))
+    {
+        auto ret = ValueType();
+        JSONSerializer<ValueType>::from_json(*this, ret);
+        return ret;
+    }
+
+    /*!
+    @brief get a value (explicit); special case
+
+    Explicit type conversion between the JSON value and a compatible value
+    which is **not** [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+    and **not** [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
+    The value is converted by calling the @ref json_serializer<ValueType>
+    `from_json()` method.
+
+    The function is equivalent to executing
+    @code {.cpp}
+    return JSONSerializer<ValueType>::from_json(*this);
+    @endcode
+
+    This overloads is chosen if:
+    - @a ValueType is not @ref basic_json and
+    - @ref json_serializer<ValueType> has a `from_json()` method of the form
+      `ValueType from_json(const basic_json&)`
+
+    @note If @ref json_serializer<ValueType> has both overloads of
+    `from_json()`, this one is chosen.
+
+    @tparam ValueType the returned value type
+
+    @return copy of the JSON value, converted to @a ValueType
+
+    @throw what @ref json_serializer<ValueType> `from_json()` method throws
+
+    @since version 2.1.0
+    */
+    template < typename ValueType,
+               detail::enable_if_t <
+                   detail::has_non_default_from_json<basic_json_t, ValueType>::value,
+                   int > = 0 >
+    ValueType get_impl(detail::priority_tag<1> /*unused*/) const noexcept(noexcept(
+                JSONSerializer<ValueType>::from_json(std::declval<const basic_json_t&>())))
+    {
+        return JSONSerializer<ValueType>::from_json(*this);
+    }
+
+    /*!
+    @brief get special-case overload
+
+    This overloads converts the current @ref basic_json in a different
+    @ref basic_json type
+
+    @tparam BasicJsonType == @ref basic_json
+
+    @return a copy of *this, converted into @a BasicJsonType
+
+    @complexity Depending on the implementation of the called `from_json()`
+                method.
+
+    @since version 3.2.0
+    */
+    template < typename BasicJsonType,
+               detail::enable_if_t <
+                   detail::is_basic_json<BasicJsonType>::value,
+                   int > = 0 >
+    BasicJsonType get_impl(detail::priority_tag<2> /*unused*/) const
+    {
+        return *this;
+    }
+
+    /*!
+    @brief get special-case overload
+
+    This overloads avoids a lot of template boilerplate, it can be seen as the
+    identity method
+
+    @tparam BasicJsonType == @ref basic_json
+
+    @return a copy of *this
+
+    @complexity Constant.
+
+    @since version 2.1.0
+    */
+    template<typename BasicJsonType,
+             detail::enable_if_t<
+                 std::is_same<BasicJsonType, basic_json_t>::value,
+                 int> = 0>
+    basic_json get_impl(detail::priority_tag<3> /*unused*/) const
+    {
+        return *this;
+    }
+
+    /*!
+    @brief get a pointer value (explicit)
+    @copydoc get()
+    */
+    template<typename PointerType,
+             detail::enable_if_t<
+                 std::is_pointer<PointerType>::value,
+                 int> = 0>
+    constexpr auto get_impl(detail::priority_tag<4> /*unused*/) const noexcept
+    -> decltype(std::declval<const basic_json_t&>().template get_ptr<PointerType>())
+    {
+        // delegate the call to get_ptr
+        return get_ptr<PointerType>();
+    }
+
+  public:
+    /*!
+    @brief get a (pointer) value (explicit)
+
+    Performs explicit type conversion between the JSON value and a compatible value if required.
+
+    - If the requested type is a pointer to the internally stored JSON value that pointer is returned.
+    No copies are made.
+
+    - If the requested type is the current @ref basic_json, or a different @ref basic_json convertible
+    from the current @ref basic_json.
+
+    - Otherwise the value is converted by calling the @ref json_serializer<ValueType> `from_json()`
+    method.
+
+    @tparam ValueTypeCV the provided value type
+    @tparam ValueType the returned value type
+
+    @return copy of the JSON value, converted to @tparam ValueType if necessary
+
+    @throw what @ref json_serializer<ValueType> `from_json()` method throws if conversion is required
+
+    @since version 2.1.0
+    */
+    template < typename ValueTypeCV, typename ValueType = detail::uncvref_t<ValueTypeCV>>
+#if defined(JSON_HAS_CPP_14)
+    constexpr
+#endif
+    auto get() const noexcept(
+    noexcept(std::declval<const basic_json_t&>().template get_impl<ValueType>(detail::priority_tag<4> {})))
+    -> decltype(std::declval<const basic_json_t&>().template get_impl<ValueType>(detail::priority_tag<4> {}))
+    {
+        // we cannot static_assert on ValueTypeCV being non-const, because
+        // there is support for get<const basic_json_t>(), which is why we
+        // still need the uncvref
+        static_assert(!std::is_reference<ValueTypeCV>::value,
+                      "get() cannot be used with reference types, you might want to use get_ref()");
+        return get_impl<ValueType>(detail::priority_tag<4> {});
+    }
+
+    /*!
+    @brief get a pointer value (explicit)
+
+    Explicit pointer access to the internally stored JSON value. No copies are
+    made.
+
+    @warning The pointer becomes invalid if the underlying JSON object
+    changes.
+
+    @tparam PointerType pointer type; must be a pointer to @ref array_t, @ref
+    object_t, @ref string_t, @ref boolean_t, @ref number_integer_t,
+    @ref number_unsigned_t, or @ref number_float_t.
+
+    @return pointer to the internally stored JSON value if the requested
+    pointer type @a PointerType fits to the JSON value; `nullptr` otherwise
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how pointers to internal values of a
+    JSON value can be requested. Note that no type conversions are made and a
+    `nullptr` is returned if the value and the requested pointer type does not
+    match.,get__PointerType}
+
+    @sa see @ref get_ptr() for explicit pointer-member access
+
+    @since version 1.0.0
+    */
+    template<typename PointerType, typename std::enable_if<
+                 std::is_pointer<PointerType>::value, int>::type = 0>
+    auto get() noexcept -> decltype(std::declval<basic_json_t&>().template get_ptr<PointerType>())
+    {
+        // delegate the call to get_ptr
+        return get_ptr<PointerType>();
+    }
+
+    /*!
+    @brief get a value (explicit)
+
+    Explicit type conversion between the JSON value and a compatible value.
+    The value is filled into the input parameter by calling the @ref json_serializer<ValueType>
+    `from_json()` method.
+
+    The function is equivalent to executing
+    @code {.cpp}
+    ValueType v;
+    JSONSerializer<ValueType>::from_json(*this, v);
+    @endcode
+
+    This overloads is chosen if:
+    - @a ValueType is not @ref basic_json,
+    - @ref json_serializer<ValueType> has a `from_json()` method of the form
+      `void from_json(const basic_json&, ValueType&)`, and
+
+    @tparam ValueType the input parameter type.
+
+    @return the input parameter, allowing chaining calls.
+
+    @throw what @ref json_serializer<ValueType> `from_json()` method throws
+
+    @liveexample{The example below shows several conversions from JSON values
+    to other types. There a few things to note: (1) Floating-point numbers can
+    be converted to integers\, (2) A JSON array can be converted to a standard
+    `std::vector<short>`\, (3) A JSON object can be converted to C++
+    associative containers such as `std::unordered_map<std::string\,
+    json>`.,get_to}
+
+    @since version 3.3.0
+    */
+    template < typename ValueType,
+               detail::enable_if_t <
+                   !detail::is_basic_json<ValueType>::value&&
+                   detail::has_from_json<basic_json_t, ValueType>::value,
+                   int > = 0 >
+    ValueType & get_to(ValueType& v) const noexcept(noexcept(
+                JSONSerializer<ValueType>::from_json(std::declval<const basic_json_t&>(), v)))
+    {
+        JSONSerializer<ValueType>::from_json(*this, v);
+        return v;
+    }
+
+    // specialization to allow to call get_to with a basic_json value
+    // see https://github.com/nlohmann/json/issues/2175
+    template<typename ValueType,
+             detail::enable_if_t <
+                 detail::is_basic_json<ValueType>::value,
+                 int> = 0>
+    ValueType & get_to(ValueType& v) const
+    {
+        v = *this;
+        return v;
+    }
+
+    template <
+        typename T, std::size_t N,
+        typename Array = T (&)[N], // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+        detail::enable_if_t <
+            detail::has_from_json<basic_json_t, Array>::value, int > = 0 >
+    Array get_to(T (&v)[N]) const // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+    noexcept(noexcept(JSONSerializer<Array>::from_json(
+                          std::declval<const basic_json_t&>(), v)))
+    {
+        JSONSerializer<Array>::from_json(*this, v);
+        return v;
+    }
+
+    /*!
+    @brief get a reference value (implicit)
+
+    Implicit reference access to the internally stored JSON value. No copies
+    are made.
+
+    @warning Writing data to the referee of the result yields an undefined
+    state.
+
+    @tparam ReferenceType reference type; must be a reference to @ref array_t,
+    @ref object_t, @ref string_t, @ref boolean_t, @ref number_integer_t, or
+    @ref number_float_t. Enforced by static assertion.
+
+    @return reference to the internally stored JSON value if the requested
+    reference type @a ReferenceType fits to the JSON value; throws
+    type_error.303 otherwise
+
+    @throw type_error.303 in case passed type @a ReferenceType is incompatible
+    with the stored JSON value; see example below
+
+    @complexity Constant.
+
+    @liveexample{The example shows several calls to `get_ref()`.,get_ref}
+
+    @since version 1.1.0
+    */
+    template<typename ReferenceType, typename std::enable_if<
+                 std::is_reference<ReferenceType>::value, int>::type = 0>
+    ReferenceType get_ref()
+    {
+        // delegate call to get_ref_impl
+        return get_ref_impl<ReferenceType>(*this);
+    }
+
+    /*!
+    @brief get a reference value (implicit)
+    @copydoc get_ref()
+    */
+    template < typename ReferenceType, typename std::enable_if <
+                   std::is_reference<ReferenceType>::value&&
+                   std::is_const<typename std::remove_reference<ReferenceType>::type>::value, int >::type = 0 >
+    ReferenceType get_ref() const
+    {
+        // delegate call to get_ref_impl
+        return get_ref_impl<ReferenceType>(*this);
+    }
+
+    /*!
+    @brief get a value (implicit)
+
+    Implicit type conversion between the JSON value and a compatible value.
+    The call is realized by calling @ref get() const.
+
+    @tparam ValueType non-pointer type compatible to the JSON value, for
+    instance `int` for JSON integer numbers, `bool` for JSON booleans, or
+    `std::vector` types for JSON arrays. The character type of @ref string_t
+    as well as an initializer list of this type is excluded to avoid
+    ambiguities as these types implicitly convert to `std::string`.
+
+    @return copy of the JSON value, converted to type @a ValueType
+
+    @throw type_error.302 in case passed type @a ValueType is incompatible
+    to the JSON value type (e.g., the JSON value is of type boolean, but a
+    string is requested); see example below
+
+    @complexity Linear in the size of the JSON value.
+
+    @liveexample{The example below shows several conversions from JSON values
+    to other types. There a few things to note: (1) Floating-point numbers can
+    be converted to integers\, (2) A JSON array can be converted to a standard
+    `std::vector<short>`\, (3) A JSON object can be converted to C++
+    associative containers such as `std::unordered_map<std::string\,
+    json>`.,operator__ValueType}
+
+    @since version 1.0.0
+    */
+    template < typename ValueType, typename std::enable_if <
+                   detail::conjunction <
+                       detail::negation<std::is_pointer<ValueType>>,
+                       detail::negation<std::is_same<ValueType, detail::json_ref<basic_json>>>,
+                                        detail::negation<std::is_same<ValueType, typename string_t::value_type>>,
+                                        detail::negation<detail::is_basic_json<ValueType>>,
+                                        detail::negation<std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>>,
+
+#if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER >= 1910 && _MSC_VER <= 1914))
+                                                detail::negation<std::is_same<ValueType, std::string_view>>,
+#endif
+                                                detail::is_detected_lazy<detail::get_template_function, const basic_json_t&, ValueType>
+                                                >::value, int >::type = 0 >
+                                        JSON_EXPLICIT operator ValueType() const
+    {
+        // delegate the call to get<>() const
+        return get<ValueType>();
+    }
+
+    /*!
+    @return reference to the binary value
+
+    @throw type_error.302 if the value is not binary
+
+    @sa see @ref is_binary() to check if the value is binary
+
+    @since version 3.8.0
+    */
+    binary_t& get_binary()
+    {
+        if (!is_binary())
+        {
+            JSON_THROW(type_error::create(302, "type must be binary, but is " + std::string(type_name()), *this));
+        }
+
+        return *get_ptr<binary_t*>();
+    }
+
+    /// @copydoc get_binary()
+    const binary_t& get_binary() const
+    {
+        if (!is_binary())
+        {
+            JSON_THROW(type_error::create(302, "type must be binary, but is " + std::string(type_name()), *this));
+        }
+
+        return *get_ptr<const binary_t*>();
+    }
+
+    /// @}
+
+
+    ////////////////////
+    // element access //
+    ////////////////////
+
+    /// @name element access
+    /// Access to the JSON value.
+    /// @{
+
+    /*!
+    @brief access specified array element with bounds checking
+
+    Returns a reference to the element at specified location @a idx, with
+    bounds checking.
+
+    @param[in] idx  index of the element to access
+
+    @return reference to the element at index @a idx
+
+    @throw type_error.304 if the JSON value is not an array; in this case,
+    calling `at` with an index makes no sense. See example below.
+    @throw out_of_range.401 if the index @a idx is out of range of the array;
+    that is, `idx >= size()`. See example below.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Constant.
+
+    @since version 1.0.0
+
+    @liveexample{The example below shows how array elements can be read and
+    written using `at()`. It also demonstrates the different exceptions that
+    can be thrown.,at__size_type}
+    */
+    reference at(size_type idx)
+    {
+        // at only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            JSON_TRY
+            {
+                return set_parent(m_value.array->at(idx));
+            }
+            JSON_CATCH (std::out_of_range&)
+            {
+                // create better exception explanation
+                JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range", *this));
+            }
+        }
+        else
+        {
+            JSON_THROW(type_error::create(304, "cannot use at() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /*!
+    @brief access specified array element with bounds checking
+
+    Returns a const reference to the element at specified location @a idx,
+    with bounds checking.
+
+    @param[in] idx  index of the element to access
+
+    @return const reference to the element at index @a idx
+
+    @throw type_error.304 if the JSON value is not an array; in this case,
+    calling `at` with an index makes no sense. See example below.
+    @throw out_of_range.401 if the index @a idx is out of range of the array;
+    that is, `idx >= size()`. See example below.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Constant.
+
+    @since version 1.0.0
+
+    @liveexample{The example below shows how array elements can be read using
+    `at()`. It also demonstrates the different exceptions that can be thrown.,
+    at__size_type_const}
+    */
+    const_reference at(size_type idx) const
+    {
+        // at only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            JSON_TRY
+            {
+                return m_value.array->at(idx);
+            }
+            JSON_CATCH (std::out_of_range&)
+            {
+                // create better exception explanation
+                JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range", *this));
+            }
+        }
+        else
+        {
+            JSON_THROW(type_error::create(304, "cannot use at() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /*!
+    @brief access specified object element with bounds checking
+
+    Returns a reference to the element at with specified key @a key, with
+    bounds checking.
+
+    @param[in] key  key of the element to access
+
+    @return reference to the element at key @a key
+
+    @throw type_error.304 if the JSON value is not an object; in this case,
+    calling `at` with a key makes no sense. See example below.
+    @throw out_of_range.403 if the key @a key is is not stored in the object;
+    that is, `find(key) == end()`. See example below.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Logarithmic in the size of the container.
+
+    @sa see @ref operator[](const typename object_t::key_type&) for unchecked
+    access by reference
+    @sa see @ref value() for access by value with a default value
+
+    @since version 1.0.0
+
+    @liveexample{The example below shows how object elements can be read and
+    written using `at()`. It also demonstrates the different exceptions that
+    can be thrown.,at__object_t_key_type}
+    */
+    reference at(const typename object_t::key_type& key)
+    {
+        // at only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            JSON_TRY
+            {
+                return set_parent(m_value.object->at(key));
+            }
+            JSON_CATCH (std::out_of_range&)
+            {
+                // create better exception explanation
+                JSON_THROW(out_of_range::create(403, "key '" + key + "' not found", *this));
+            }
+        }
+        else
+        {
+            JSON_THROW(type_error::create(304, "cannot use at() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /*!
+    @brief access specified object element with bounds checking
+
+    Returns a const reference to the element at with specified key @a key,
+    with bounds checking.
+
+    @param[in] key  key of the element to access
+
+    @return const reference to the element at key @a key
+
+    @throw type_error.304 if the JSON value is not an object; in this case,
+    calling `at` with a key makes no sense. See example below.
+    @throw out_of_range.403 if the key @a key is is not stored in the object;
+    that is, `find(key) == end()`. See example below.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Logarithmic in the size of the container.
+
+    @sa see @ref operator[](const typename object_t::key_type&) for unchecked
+    access by reference
+    @sa see @ref value() for access by value with a default value
+
+    @since version 1.0.0
+
+    @liveexample{The example below shows how object elements can be read using
+    `at()`. It also demonstrates the different exceptions that can be thrown.,
+    at__object_t_key_type_const}
+    */
+    const_reference at(const typename object_t::key_type& key) const
+    {
+        // at only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            JSON_TRY
+            {
+                return m_value.object->at(key);
+            }
+            JSON_CATCH (std::out_of_range&)
+            {
+                // create better exception explanation
+                JSON_THROW(out_of_range::create(403, "key '" + key + "' not found", *this));
+            }
+        }
+        else
+        {
+            JSON_THROW(type_error::create(304, "cannot use at() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /*!
+    @brief access specified array element
+
+    Returns a reference to the element at specified location @a idx.
+
+    @note If @a idx is beyond the range of the array (i.e., `idx >= size()`),
+    then the array is silently filled up with `null` values to make `idx` a
+    valid reference to the last stored element.
+
+    @param[in] idx  index of the element to access
+
+    @return reference to the element at index @a idx
+
+    @throw type_error.305 if the JSON value is not an array or null; in that
+    cases, using the [] operator with an index makes no sense.
+
+    @complexity Constant if @a idx is in the range of the array. Otherwise
+    linear in `idx - size()`.
+
+    @liveexample{The example below shows how array elements can be read and
+    written using `[]` operator. Note the addition of `null`
+    values.,operatorarray__size_type}
+
+    @since version 1.0.0
+    */
+    reference operator[](size_type idx)
+    {
+        // implicitly convert null value to an empty array
+        if (is_null())
+        {
+            m_type = value_t::array;
+            m_value.array = create<array_t>();
+            assert_invariant();
+        }
+
+        // operator[] only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            // fill up array with null values if given idx is outside range
+            if (idx >= m_value.array->size())
+            {
+#if JSON_DIAGNOSTICS
+                // remember array size & capacity before resizing
+                const auto old_size = m_value.array->size();
+                const auto old_capacity = m_value.array->capacity();
+#endif
+                m_value.array->resize(idx + 1);
+
+#if JSON_DIAGNOSTICS
+                if (JSON_HEDLEY_UNLIKELY(m_value.array->capacity() != old_capacity))
+                {
+                    // capacity has changed: update all parents
+                    set_parents();
+                }
+                else
+                {
+                    // set parent for values added above
+                    set_parents(begin() + static_cast<typename iterator::difference_type>(old_size), static_cast<typename iterator::difference_type>(idx + 1 - old_size));
+                }
+#endif
+                assert_invariant();
+            }
+
+            return m_value.array->operator[](idx);
+        }
+
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a numeric argument with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief access specified array element
+
+    Returns a const reference to the element at specified location @a idx.
+
+    @param[in] idx  index of the element to access
+
+    @return const reference to the element at index @a idx
+
+    @throw type_error.305 if the JSON value is not an array; in that case,
+    using the [] operator with an index makes no sense.
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how array elements can be read using
+    the `[]` operator.,operatorarray__size_type_const}
+
+    @since version 1.0.0
+    */
+    const_reference operator[](size_type idx) const
+    {
+        // const operator[] only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            return m_value.array->operator[](idx);
+        }
+
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a numeric argument with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief access specified object element
+
+    Returns a reference to the element at with specified key @a key.
+
+    @note If @a key is not found in the object, then it is silently added to
+    the object and filled with a `null` value to make `key` a valid reference.
+    In case the value was `null` before, it is converted to an object.
+
+    @param[in] key  key of the element to access
+
+    @return reference to the element at key @a key
+
+    @throw type_error.305 if the JSON value is not an object or null; in that
+    cases, using the [] operator with a key makes no sense.
+
+    @complexity Logarithmic in the size of the container.
+
+    @liveexample{The example below shows how object elements can be read and
+    written using the `[]` operator.,operatorarray__key_type}
+
+    @sa see @ref at(const typename object_t::key_type&) for access by reference
+    with range checking
+    @sa see @ref value() for access by value with a default value
+
+    @since version 1.0.0
+    */
+    reference operator[](const typename object_t::key_type& key)
+    {
+        // implicitly convert null value to an empty object
+        if (is_null())
+        {
+            m_type = value_t::object;
+            m_value.object = create<object_t>();
+            assert_invariant();
+        }
+
+        // operator[] only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            return set_parent(m_value.object->operator[](key));
+        }
+
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief read-only access specified object element
+
+    Returns a const reference to the element at with specified key @a key. No
+    bounds checking is performed.
+
+    @warning If the element with key @a key does not exist, the behavior is
+    undefined.
+
+    @param[in] key  key of the element to access
+
+    @return const reference to the element at key @a key
+
+    @pre The element with key @a key must exist. **This precondition is
+         enforced with an assertion.**
+
+    @throw type_error.305 if the JSON value is not an object; in that case,
+    using the [] operator with a key makes no sense.
+
+    @complexity Logarithmic in the size of the container.
+
+    @liveexample{The example below shows how object elements can be read using
+    the `[]` operator.,operatorarray__key_type_const}
+
+    @sa see @ref at(const typename object_t::key_type&) for access by reference
+    with range checking
+    @sa see @ref value() for access by value with a default value
+
+    @since version 1.0.0
+    */
+    const_reference operator[](const typename object_t::key_type& key) const
+    {
+        // const operator[] only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            JSON_ASSERT(m_value.object->find(key) != m_value.object->end());
+            return m_value.object->find(key)->second;
+        }
+
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief access specified object element
+
+    Returns a reference to the element at with specified key @a key.
+
+    @note If @a key is not found in the object, then it is silently added to
+    the object and filled with a `null` value to make `key` a valid reference.
+    In case the value was `null` before, it is converted to an object.
+
+    @param[in] key  key of the element to access
+
+    @return reference to the element at key @a key
+
+    @throw type_error.305 if the JSON value is not an object or null; in that
+    cases, using the [] operator with a key makes no sense.
+
+    @complexity Logarithmic in the size of the container.
+
+    @liveexample{The example below shows how object elements can be read and
+    written using the `[]` operator.,operatorarray__key_type}
+
+    @sa see @ref at(const typename object_t::key_type&) for access by reference
+    with range checking
+    @sa see @ref value() for access by value with a default value
+
+    @since version 1.1.0
+    */
+    template<typename T>
+    JSON_HEDLEY_NON_NULL(2)
+    reference operator[](T* key)
+    {
+        // implicitly convert null to object
+        if (is_null())
+        {
+            m_type = value_t::object;
+            m_value = value_t::object;
+            assert_invariant();
+        }
+
+        // at only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            return set_parent(m_value.object->operator[](key));
+        }
+
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief read-only access specified object element
+
+    Returns a const reference to the element at with specified key @a key. No
+    bounds checking is performed.
+
+    @warning If the element with key @a key does not exist, the behavior is
+    undefined.
+
+    @param[in] key  key of the element to access
+
+    @return const reference to the element at key @a key
+
+    @pre The element with key @a key must exist. **This precondition is
+         enforced with an assertion.**
+
+    @throw type_error.305 if the JSON value is not an object; in that case,
+    using the [] operator with a key makes no sense.
+
+    @complexity Logarithmic in the size of the container.
+
+    @liveexample{The example below shows how object elements can be read using
+    the `[]` operator.,operatorarray__key_type_const}
+
+    @sa see @ref at(const typename object_t::key_type&) for access by reference
+    with range checking
+    @sa see @ref value() for access by value with a default value
+
+    @since version 1.1.0
+    */
+    template<typename T>
+    JSON_HEDLEY_NON_NULL(2)
+    const_reference operator[](T* key) const
+    {
+        // at only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            JSON_ASSERT(m_value.object->find(key) != m_value.object->end());
+            return m_value.object->find(key)->second;
+        }
+
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief access specified object element with default value
+
+    Returns either a copy of an object's element at the specified key @a key
+    or a given default value if no element with key @a key exists.
+
+    The function is basically equivalent to executing
+    @code {.cpp}
+    try {
+        return at(key);
+    } catch(out_of_range) {
+        return default_value;
+    }
+    @endcode
+
+    @note Unlike @ref at(const typename object_t::key_type&), this function
+    does not throw if the given key @a key was not found.
+
+    @note Unlike @ref operator[](const typename object_t::key_type& key), this
+    function does not implicitly add an element to the position defined by @a
+    key. This function is furthermore also applicable to const objects.
+
+    @param[in] key  key of the element to access
+    @param[in] default_value  the value to return if @a key is not found
+
+    @tparam ValueType type compatible to JSON values, for instance `int` for
+    JSON integer numbers, `bool` for JSON booleans, or `std::vector` types for
+    JSON arrays. Note the type of the expected value at @a key and the default
+    value @a default_value must be compatible.
+
+    @return copy of the element at key @a key or @a default_value if @a key
+    is not found
+
+    @throw type_error.302 if @a default_value does not match the type of the
+    value at @a key
+    @throw type_error.306 if the JSON value is not an object; in that case,
+    using `value()` with a key makes no sense.
+
+    @complexity Logarithmic in the size of the container.
+
+    @liveexample{The example below shows how object elements can be queried
+    with a default value.,basic_json__value}
+
+    @sa see @ref at(const typename object_t::key_type&) for access by reference
+    with range checking
+    @sa see @ref operator[](const typename object_t::key_type&) for unchecked
+    access by reference
+
+    @since version 1.0.0
+    */
+    // using std::is_convertible in a std::enable_if will fail when using explicit conversions
+    template < class ValueType, typename std::enable_if <
+                   detail::is_getable<basic_json_t, ValueType>::value
+                   && !std::is_same<value_t, ValueType>::value, int >::type = 0 >
+    ValueType value(const typename object_t::key_type& key, const ValueType& default_value) const
+    {
+        // at only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            // if key is found, return value and given default value otherwise
+            const auto it = find(key);
+            if (it != end())
+            {
+                return it->template get<ValueType>();
+            }
+
+            return default_value;
+        }
+
+        JSON_THROW(type_error::create(306, "cannot use value() with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief overload for a default value of type const char*
+    @copydoc basic_json::value(const typename object_t::key_type&, const ValueType&) const
+    */
+    string_t value(const typename object_t::key_type& key, const char* default_value) const
+    {
+        return value(key, string_t(default_value));
+    }
+
+    /*!
+    @brief access specified object element via JSON Pointer with default value
+
+    Returns either a copy of an object's element at the specified key @a key
+    or a given default value if no element with key @a key exists.
+
+    The function is basically equivalent to executing
+    @code {.cpp}
+    try {
+        return at(ptr);
+    } catch(out_of_range) {
+        return default_value;
+    }
+    @endcode
+
+    @note Unlike @ref at(const json_pointer&), this function does not throw
+    if the given key @a key was not found.
+
+    @param[in] ptr  a JSON pointer to the element to access
+    @param[in] default_value  the value to return if @a ptr found no value
+
+    @tparam ValueType type compatible to JSON values, for instance `int` for
+    JSON integer numbers, `bool` for JSON booleans, or `std::vector` types for
+    JSON arrays. Note the type of the expected value at @a key and the default
+    value @a default_value must be compatible.
+
+    @return copy of the element at key @a key or @a default_value if @a key
+    is not found
+
+    @throw type_error.302 if @a default_value does not match the type of the
+    value at @a ptr
+    @throw type_error.306 if the JSON value is not an object; in that case,
+    using `value()` with a key makes no sense.
+
+    @complexity Logarithmic in the size of the container.
+
+    @liveexample{The example below shows how object elements can be queried
+    with a default value.,basic_json__value_ptr}
+
+    @sa see @ref operator[](const json_pointer&) for unchecked access by reference
+
+    @since version 2.0.2
+    */
+    template<class ValueType, typename std::enable_if<
+                 detail::is_getable<basic_json_t, ValueType>::value, int>::type = 0>
+    ValueType value(const json_pointer& ptr, const ValueType& default_value) const
+    {
+        // at only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            // if pointer resolves a value, return it or use default value
+            JSON_TRY
+            {
+                return ptr.get_checked(this).template get<ValueType>();
+            }
+            JSON_INTERNAL_CATCH (out_of_range&)
+            {
+                return default_value;
+            }
+        }
+
+        JSON_THROW(type_error::create(306, "cannot use value() with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief overload for a default value of type const char*
+    @copydoc basic_json::value(const json_pointer&, ValueType) const
+    */
+    JSON_HEDLEY_NON_NULL(3)
+    string_t value(const json_pointer& ptr, const char* default_value) const
+    {
+        return value(ptr, string_t(default_value));
+    }
+
+    /*!
+    @brief access the first element
+
+    Returns a reference to the first element in the container. For a JSON
+    container `c`, the expression `c.front()` is equivalent to `*c.begin()`.
+
+    @return In case of a structured type (array or object), a reference to the
+    first element is returned. In case of number, string, boolean, or binary
+    values, a reference to the value is returned.
+
+    @complexity Constant.
+
+    @pre The JSON value must not be `null` (would throw `std::out_of_range`)
+    or an empty array or object (undefined behavior, **guarded by
+    assertions**).
+    @post The JSON value remains unchanged.
+
+    @throw invalid_iterator.214 when called on `null` value
+
+    @liveexample{The following code shows an example for `front()`.,front}
+
+    @sa see @ref back() -- access the last element
+
+    @since version 1.0.0
+    */
+    reference front()
+    {
+        return *begin();
+    }
+
+    /*!
+    @copydoc basic_json::front()
+    */
+    const_reference front() const
+    {
+        return *cbegin();
+    }
+
+    /*!
+    @brief access the last element
+
+    Returns a reference to the last element in the container. For a JSON
+    container `c`, the expression `c.back()` is equivalent to
+    @code {.cpp}
+    auto tmp = c.end();
+    --tmp;
+    return *tmp;
+    @endcode
+
+    @return In case of a structured type (array or object), a reference to the
+    last element is returned. In case of number, string, boolean, or binary
+    values, a reference to the value is returned.
+
+    @complexity Constant.
+
+    @pre The JSON value must not be `null` (would throw `std::out_of_range`)
+    or an empty array or object (undefined behavior, **guarded by
+    assertions**).
+    @post The JSON value remains unchanged.
+
+    @throw invalid_iterator.214 when called on a `null` value. See example
+    below.
+
+    @liveexample{The following code shows an example for `back()`.,back}
+
+    @sa see @ref front() -- access the first element
+
+    @since version 1.0.0
+    */
+    reference back()
+    {
+        auto tmp = end();
+        --tmp;
+        return *tmp;
+    }
+
+    /*!
+    @copydoc basic_json::back()
+    */
+    const_reference back() const
+    {
+        auto tmp = cend();
+        --tmp;
+        return *tmp;
+    }
+
+    /*!
+    @brief remove element given an iterator
+
+    Removes the element specified by iterator @a pos. The iterator @a pos must
+    be valid and dereferenceable. Thus the `end()` iterator (which is valid,
+    but is not dereferenceable) cannot be used as a value for @a pos.
+
+    If called on a primitive type other than `null`, the resulting JSON value
+    will be `null`.
+
+    @param[in] pos iterator to the element to remove
+    @return Iterator following the last removed element. If the iterator @a
+    pos refers to the last element, the `end()` iterator is returned.
+
+    @tparam IteratorType an @ref iterator or @ref const_iterator
+
+    @post Invalidates iterators and references at or after the point of the
+    erase, including the `end()` iterator.
+
+    @throw type_error.307 if called on a `null` value; example: `"cannot use
+    erase() with null"`
+    @throw invalid_iterator.202 if called on an iterator which does not belong
+    to the current JSON value; example: `"iterator does not fit current
+    value"`
+    @throw invalid_iterator.205 if called on a primitive type with invalid
+    iterator (i.e., any iterator which is not `begin()`); example: `"iterator
+    out of range"`
+
+    @complexity The complexity depends on the type:
+    - objects: amortized constant
+    - arrays: linear in distance between @a pos and the end of the container
+    - strings and binary: linear in the length of the member
+    - other types: constant
+
+    @liveexample{The example shows the result of `erase()` for different JSON
+    types.,erase__IteratorType}
+
+    @sa see @ref erase(IteratorType, IteratorType) -- removes the elements in
+    the given range
+    @sa see @ref erase(const typename object_t::key_type&) -- removes the element
+    from an object at the given key
+    @sa see @ref erase(const size_type) -- removes the element from an array at
+    the given index
+
+    @since version 1.0.0
+    */
+    template < class IteratorType, typename std::enable_if <
+                   std::is_same<IteratorType, typename basic_json_t::iterator>::value ||
+                   std::is_same<IteratorType, typename basic_json_t::const_iterator>::value, int >::type
+               = 0 >
+    IteratorType erase(IteratorType pos)
+    {
+        // make sure iterator fits the current value
+        if (JSON_HEDLEY_UNLIKELY(this != pos.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value", *this));
+        }
+
+        IteratorType result = end();
+
+        switch (m_type)
+        {
+            case value_t::boolean:
+            case value_t::number_float:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::string:
+            case value_t::binary:
+            {
+                if (JSON_HEDLEY_UNLIKELY(!pos.m_it.primitive_iterator.is_begin()))
+                {
+                    JSON_THROW(invalid_iterator::create(205, "iterator out of range", *this));
+                }
+
+                if (is_string())
+                {
+                    AllocatorType<string_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, m_value.string);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.string, 1);
+                    m_value.string = nullptr;
+                }
+                else if (is_binary())
+                {
+                    AllocatorType<binary_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, m_value.binary);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.binary, 1);
+                    m_value.binary = nullptr;
+                }
+
+                m_type = value_t::null;
+                assert_invariant();
+                break;
+            }
+
+            case value_t::object:
+            {
+                result.m_it.object_iterator = m_value.object->erase(pos.m_it.object_iterator);
+                break;
+            }
+
+            case value_t::array:
+            {
+                result.m_it.array_iterator = m_value.array->erase(pos.m_it.array_iterator);
+                break;
+            }
+
+            case value_t::null:
+            case value_t::discarded:
+            default:
+                JSON_THROW(type_error::create(307, "cannot use erase() with " + std::string(type_name()), *this));
+        }
+
+        return result;
+    }
+
+    /*!
+    @brief remove elements given an iterator range
+
+    Removes the element specified by the range `[first; last)`. The iterator
+    @a first does not need to be dereferenceable if `first == last`: erasing
+    an empty range is a no-op.
+
+    If called on a primitive type other than `null`, the resulting JSON value
+    will be `null`.
+
+    @param[in] first iterator to the beginning of the range to remove
+    @param[in] last iterator past the end of the range to remove
+    @return Iterator following the last removed element. If the iterator @a
+    second refers to the last element, the `end()` iterator is returned.
+
+    @tparam IteratorType an @ref iterator or @ref const_iterator
+
+    @post Invalidates iterators and references at or after the point of the
+    erase, including the `end()` iterator.
+
+    @throw type_error.307 if called on a `null` value; example: `"cannot use
+    erase() with null"`
+    @throw invalid_iterator.203 if called on iterators which does not belong
+    to the current JSON value; example: `"iterators do not fit current value"`
+    @throw invalid_iterator.204 if called on a primitive type with invalid
+    iterators (i.e., if `first != begin()` and `last != end()`); example:
+    `"iterators out of range"`
+
+    @complexity The complexity depends on the type:
+    - objects: `log(size()) + std::distance(first, last)`
+    - arrays: linear in the distance between @a first and @a last, plus linear
+      in the distance between @a last and end of the container
+    - strings and binary: linear in the length of the member
+    - other types: constant
+
+    @liveexample{The example shows the result of `erase()` for different JSON
+    types.,erase__IteratorType_IteratorType}
+
+    @sa see @ref erase(IteratorType) -- removes the element at a given position
+    @sa see @ref erase(const typename object_t::key_type&) -- removes the element
+    from an object at the given key
+    @sa see @ref erase(const size_type) -- removes the element from an array at
+    the given index
+
+    @since version 1.0.0
+    */
+    template < class IteratorType, typename std::enable_if <
+                   std::is_same<IteratorType, typename basic_json_t::iterator>::value ||
+                   std::is_same<IteratorType, typename basic_json_t::const_iterator>::value, int >::type
+               = 0 >
+    IteratorType erase(IteratorType first, IteratorType last)
+    {
+        // make sure iterator fits the current value
+        if (JSON_HEDLEY_UNLIKELY(this != first.m_object || this != last.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(203, "iterators do not fit current value", *this));
+        }
+
+        IteratorType result = end();
+
+        switch (m_type)
+        {
+            case value_t::boolean:
+            case value_t::number_float:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::string:
+            case value_t::binary:
+            {
+                if (JSON_HEDLEY_LIKELY(!first.m_it.primitive_iterator.is_begin()
+                                       || !last.m_it.primitive_iterator.is_end()))
+                {
+                    JSON_THROW(invalid_iterator::create(204, "iterators out of range", *this));
+                }
+
+                if (is_string())
+                {
+                    AllocatorType<string_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, m_value.string);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.string, 1);
+                    m_value.string = nullptr;
+                }
+                else if (is_binary())
+                {
+                    AllocatorType<binary_t> alloc;
+                    std::allocator_traits<decltype(alloc)>::destroy(alloc, m_value.binary);
+                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.binary, 1);
+                    m_value.binary = nullptr;
+                }
+
+                m_type = value_t::null;
+                assert_invariant();
+                break;
+            }
+
+            case value_t::object:
+            {
+                result.m_it.object_iterator = m_value.object->erase(first.m_it.object_iterator,
+                                              last.m_it.object_iterator);
+                break;
+            }
+
+            case value_t::array:
+            {
+                result.m_it.array_iterator = m_value.array->erase(first.m_it.array_iterator,
+                                             last.m_it.array_iterator);
+                break;
+            }
+
+            case value_t::null:
+            case value_t::discarded:
+            default:
+                JSON_THROW(type_error::create(307, "cannot use erase() with " + std::string(type_name()), *this));
+        }
+
+        return result;
+    }
+
+    /*!
+    @brief remove element from a JSON object given a key
+
+    Removes elements from a JSON object with the key value @a key.
+
+    @param[in] key value of the elements to remove
+
+    @return Number of elements removed. If @a ObjectType is the default
+    `std::map` type, the return value will always be `0` (@a key was not
+    found) or `1` (@a key was found).
+
+    @post References and iterators to the erased elements are invalidated.
+    Other references and iterators are not affected.
+
+    @throw type_error.307 when called on a type other than JSON object;
+    example: `"cannot use erase() with null"`
+
+    @complexity `log(size()) + count(key)`
+
+    @liveexample{The example shows the effect of `erase()`.,erase__key_type}
+
+    @sa see @ref erase(IteratorType) -- removes the element at a given position
+    @sa see @ref erase(IteratorType, IteratorType) -- removes the elements in
+    the given range
+    @sa see @ref erase(const size_type) -- removes the element from an array at
+    the given index
+
+    @since version 1.0.0
+    */
+    size_type erase(const typename object_t::key_type& key)
+    {
+        // this erase only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            return m_value.object->erase(key);
+        }
+
+        JSON_THROW(type_error::create(307, "cannot use erase() with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief remove element from a JSON array given an index
+
+    Removes element from a JSON array at the index @a idx.
+
+    @param[in] idx index of the element to remove
+
+    @throw type_error.307 when called on a type other than JSON object;
+    example: `"cannot use erase() with null"`
+    @throw out_of_range.401 when `idx >= size()`; example: `"array index 17
+    is out of range"`
+
+    @complexity Linear in distance between @a idx and the end of the container.
+
+    @liveexample{The example shows the effect of `erase()`.,erase__size_type}
+
+    @sa see @ref erase(IteratorType) -- removes the element at a given position
+    @sa see @ref erase(IteratorType, IteratorType) -- removes the elements in
+    the given range
+    @sa see @ref erase(const typename object_t::key_type&) -- removes the element
+    from an object at the given key
+
+    @since version 1.0.0
+    */
+    void erase(const size_type idx)
+    {
+        // this erase only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            if (JSON_HEDLEY_UNLIKELY(idx >= size()))
+            {
+                JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range", *this));
+            }
+
+            m_value.array->erase(m_value.array->begin() + static_cast<difference_type>(idx));
+        }
+        else
+        {
+            JSON_THROW(type_error::create(307, "cannot use erase() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /// @}
+
+
+    ////////////
+    // lookup //
+    ////////////
+
+    /// @name lookup
+    /// @{
+
+    /*!
+    @brief find an element in a JSON object
+
+    Finds an element in a JSON object with key equivalent to @a key. If the
+    element is not found or the JSON value is not an object, end() is
+    returned.
+
+    @note This method always returns @ref end() when executed on a JSON type
+          that is not an object.
+
+    @param[in] key key value of the element to search for.
+
+    @return Iterator to an element with key equivalent to @a key. If no such
+    element is found or the JSON value is not an object, past-the-end (see
+    @ref end()) iterator is returned.
+
+    @complexity Logarithmic in the size of the JSON object.
+
+    @liveexample{The example shows how `find()` is used.,find__key_type}
+
+    @sa see @ref contains(KeyT&&) const -- checks whether a key exists
+
+    @since version 1.0.0
+    */
+    template<typename KeyT>
+    iterator find(KeyT&& key)
+    {
+        auto result = end();
+
+        if (is_object())
+        {
+            result.m_it.object_iterator = m_value.object->find(std::forward<KeyT>(key));
+        }
+
+        return result;
+    }
+
+    /*!
+    @brief find an element in a JSON object
+    @copydoc find(KeyT&&)
+    */
+    template<typename KeyT>
+    const_iterator find(KeyT&& key) const
+    {
+        auto result = cend();
+
+        if (is_object())
+        {
+            result.m_it.object_iterator = m_value.object->find(std::forward<KeyT>(key));
+        }
+
+        return result;
+    }
+
+    /*!
+    @brief returns the number of occurrences of a key in a JSON object
+
+    Returns the number of elements with key @a key. If ObjectType is the
+    default `std::map` type, the return value will always be `0` (@a key was
+    not found) or `1` (@a key was found).
+
+    @note This method always returns `0` when executed on a JSON type that is
+          not an object.
+
+    @param[in] key key value of the element to count
+
+    @return Number of elements with key @a key. If the JSON value is not an
+    object, the return value will be `0`.
+
+    @complexity Logarithmic in the size of the JSON object.
+
+    @liveexample{The example shows how `count()` is used.,count}
+
+    @since version 1.0.0
+    */
+    template<typename KeyT>
+    size_type count(KeyT&& key) const
+    {
+        // return 0 for all nonobject types
+        return is_object() ? m_value.object->count(std::forward<KeyT>(key)) : 0;
+    }
+
+    /*!
+    @brief check the existence of an element in a JSON object
+
+    Check whether an element exists in a JSON object with key equivalent to
+    @a key. If the element is not found or the JSON value is not an object,
+    false is returned.
+
+    @note This method always returns false when executed on a JSON type
+          that is not an object.
+
+    @param[in] key key value to check its existence.
+
+    @return true if an element with specified @a key exists. If no such
+    element with such key is found or the JSON value is not an object,
+    false is returned.
+
+    @complexity Logarithmic in the size of the JSON object.
+
+    @liveexample{The following code shows an example for `contains()`.,contains}
+
+    @sa see @ref find(KeyT&&) -- returns an iterator to an object element
+    @sa see @ref contains(const json_pointer&) const -- checks the existence for a JSON pointer
+
+    @since version 3.6.0
+    */
+    template < typename KeyT, typename std::enable_if <
+                   !std::is_same<typename std::decay<KeyT>::type, json_pointer>::value, int >::type = 0 >
+    bool contains(KeyT && key) const
+    {
+        return is_object() && m_value.object->find(std::forward<KeyT>(key)) != m_value.object->end();
+    }
+
+    /*!
+    @brief check the existence of an element in a JSON object given a JSON pointer
+
+    Check whether the given JSON pointer @a ptr can be resolved in the current
+    JSON value.
+
+    @note This method can be executed on any JSON value type.
+
+    @param[in] ptr JSON pointer to check its existence.
+
+    @return true if the JSON pointer can be resolved to a stored value, false
+    otherwise.
+
+    @post If `j.contains(ptr)` returns true, it is safe to call `j[ptr]`.
+
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+
+    @complexity Logarithmic in the size of the JSON object.
+
+    @liveexample{The following code shows an example for `contains()`.,contains_json_pointer}
+
+    @sa see @ref contains(KeyT &&) const -- checks the existence of a key
+
+    @since version 3.7.0
+    */
+    bool contains(const json_pointer& ptr) const
+    {
+        return ptr.contains(this);
+    }
+
+    /// @}
+
+
+    ///////////////
+    // iterators //
+    ///////////////
+
+    /// @name iterators
+    /// @{
+
+    /*!
+    @brief returns an iterator to the first element
+
+    Returns an iterator to the first element.
+
+    @image html range-begin-end.svg "Illustration from cppreference.com"
+
+    @return iterator to the first element
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is constant.
+
+    @liveexample{The following code shows an example for `begin()`.,begin}
+
+    @sa see @ref cbegin() -- returns a const iterator to the beginning
+    @sa see @ref end() -- returns an iterator to the end
+    @sa see @ref cend() -- returns a const iterator to the end
+
+    @since version 1.0.0
+    */
+    iterator begin() noexcept
+    {
+        iterator result(this);
+        result.set_begin();
+        return result;
+    }
+
+    /*!
+    @copydoc basic_json::cbegin()
+    */
+    const_iterator begin() const noexcept
+    {
+        return cbegin();
+    }
+
+    /*!
+    @brief returns a const iterator to the first element
+
+    Returns a const iterator to the first element.
+
+    @image html range-begin-end.svg "Illustration from cppreference.com"
+
+    @return const iterator to the first element
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `const_cast<const basic_json&>(*this).begin()`.
+
+    @liveexample{The following code shows an example for `cbegin()`.,cbegin}
+
+    @sa see @ref begin() -- returns an iterator to the beginning
+    @sa see @ref end() -- returns an iterator to the end
+    @sa see @ref cend() -- returns a const iterator to the end
+
+    @since version 1.0.0
+    */
+    const_iterator cbegin() const noexcept
+    {
+        const_iterator result(this);
+        result.set_begin();
+        return result;
+    }
+
+    /*!
+    @brief returns an iterator to one past the last element
+
+    Returns an iterator to one past the last element.
+
+    @image html range-begin-end.svg "Illustration from cppreference.com"
+
+    @return iterator one past the last element
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is constant.
+
+    @liveexample{The following code shows an example for `end()`.,end}
+
+    @sa see @ref cend() -- returns a const iterator to the end
+    @sa see @ref begin() -- returns an iterator to the beginning
+    @sa see @ref cbegin() -- returns a const iterator to the beginning
+
+    @since version 1.0.0
+    */
+    iterator end() noexcept
+    {
+        iterator result(this);
+        result.set_end();
+        return result;
+    }
+
+    /*!
+    @copydoc basic_json::cend()
+    */
+    const_iterator end() const noexcept
+    {
+        return cend();
+    }
+
+    /*!
+    @brief returns a const iterator to one past the last element
+
+    Returns a const iterator to one past the last element.
+
+    @image html range-begin-end.svg "Illustration from cppreference.com"
+
+    @return const iterator one past the last element
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `const_cast<const basic_json&>(*this).end()`.
+
+    @liveexample{The following code shows an example for `cend()`.,cend}
+
+    @sa see @ref end() -- returns an iterator to the end
+    @sa see @ref begin() -- returns an iterator to the beginning
+    @sa see @ref cbegin() -- returns a const iterator to the beginning
+
+    @since version 1.0.0
+    */
+    const_iterator cend() const noexcept
+    {
+        const_iterator result(this);
+        result.set_end();
+        return result;
+    }
+
+    /*!
+    @brief returns an iterator to the reverse-beginning
+
+    Returns an iterator to the reverse-beginning; that is, the last element.
+
+    @image html range-rbegin-rend.svg "Illustration from cppreference.com"
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `reverse_iterator(end())`.
+
+    @liveexample{The following code shows an example for `rbegin()`.,rbegin}
+
+    @sa see @ref crbegin() -- returns a const reverse iterator to the beginning
+    @sa see @ref rend() -- returns a reverse iterator to the end
+    @sa see @ref crend() -- returns a const reverse iterator to the end
+
+    @since version 1.0.0
+    */
+    reverse_iterator rbegin() noexcept
+    {
+        return reverse_iterator(end());
+    }
+
+    /*!
+    @copydoc basic_json::crbegin()
+    */
+    const_reverse_iterator rbegin() const noexcept
+    {
+        return crbegin();
+    }
+
+    /*!
+    @brief returns an iterator to the reverse-end
+
+    Returns an iterator to the reverse-end; that is, one before the first
+    element.
+
+    @image html range-rbegin-rend.svg "Illustration from cppreference.com"
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `reverse_iterator(begin())`.
+
+    @liveexample{The following code shows an example for `rend()`.,rend}
+
+    @sa see @ref crend() -- returns a const reverse iterator to the end
+    @sa see @ref rbegin() -- returns a reverse iterator to the beginning
+    @sa see @ref crbegin() -- returns a const reverse iterator to the beginning
+
+    @since version 1.0.0
+    */
+    reverse_iterator rend() noexcept
+    {
+        return reverse_iterator(begin());
+    }
+
+    /*!
+    @copydoc basic_json::crend()
+    */
+    const_reverse_iterator rend() const noexcept
+    {
+        return crend();
+    }
+
+    /*!
+    @brief returns a const reverse iterator to the last element
+
+    Returns a const iterator to the reverse-beginning; that is, the last
+    element.
+
+    @image html range-rbegin-rend.svg "Illustration from cppreference.com"
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `const_cast<const basic_json&>(*this).rbegin()`.
+
+    @liveexample{The following code shows an example for `crbegin()`.,crbegin}
+
+    @sa see @ref rbegin() -- returns a reverse iterator to the beginning
+    @sa see @ref rend() -- returns a reverse iterator to the end
+    @sa see @ref crend() -- returns a const reverse iterator to the end
+
+    @since version 1.0.0
+    */
+    const_reverse_iterator crbegin() const noexcept
+    {
+        return const_reverse_iterator(cend());
+    }
+
+    /*!
+    @brief returns a const reverse iterator to one before the first
+
+    Returns a const reverse iterator to the reverse-end; that is, one before
+    the first element.
+
+    @image html range-rbegin-rend.svg "Illustration from cppreference.com"
+
+    @complexity Constant.
+
+    @requirement This function helps `basic_json` satisfying the
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `const_cast<const basic_json&>(*this).rend()`.
+
+    @liveexample{The following code shows an example for `crend()`.,crend}
+
+    @sa see @ref rend() -- returns a reverse iterator to the end
+    @sa see @ref rbegin() -- returns a reverse iterator to the beginning
+    @sa see @ref crbegin() -- returns a const reverse iterator to the beginning
+
+    @since version 1.0.0
+    */
+    const_reverse_iterator crend() const noexcept
+    {
+        return const_reverse_iterator(cbegin());
+    }
+
+  public:
+    /*!
+    @brief wrapper to access iterator member functions in range-based for
+
+    This function allows to access @ref iterator::key() and @ref
+    iterator::value() during range-based for loops. In these loops, a
+    reference to the JSON values is returned, so there is no access to the
+    underlying iterator.
+
+    For loop without iterator_wrapper:
+
+    @code{cpp}
+    for (auto it = j_object.begin(); it != j_object.end(); ++it)
+    {
+        std::cout << "key: " << it.key() << ", value:" << it.value() << '\n';
+    }
+    @endcode
+
+    Range-based for loop without iterator proxy:
+
+    @code{cpp}
+    for (auto it : j_object)
+    {
+        // "it" is of type json::reference and has no key() member
+        std::cout << "value: " << it << '\n';
+    }
+    @endcode
+
+    Range-based for loop with iterator proxy:
+
+    @code{cpp}
+    for (auto it : json::iterator_wrapper(j_object))
+    {
+        std::cout << "key: " << it.key() << ", value:" << it.value() << '\n';
+    }
+    @endcode
+
+    @note When iterating over an array, `key()` will return the index of the
+          element as string (see example).
+
+    @param[in] ref  reference to a JSON value
+    @return iteration proxy object wrapping @a ref with an interface to use in
+            range-based for loops
+
+    @liveexample{The following code shows how the wrapper is used,iterator_wrapper}
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Constant.
+
+    @note The name of this function is not yet final and may change in the
+    future.
+
+    @deprecated This stream operator is deprecated and will be removed in
+                future 4.0.0 of the library. Please use @ref items() instead;
+                that is, replace `json::iterator_wrapper(j)` with `j.items()`.
+    */
+    JSON_HEDLEY_DEPRECATED_FOR(3.1.0, items())
+    static iteration_proxy<iterator> iterator_wrapper(reference ref) noexcept
+    {
+        return ref.items();
+    }
+
+    /*!
+    @copydoc iterator_wrapper(reference)
+    */
+    JSON_HEDLEY_DEPRECATED_FOR(3.1.0, items())
+    static iteration_proxy<const_iterator> iterator_wrapper(const_reference ref) noexcept
+    {
+        return ref.items();
+    }
+
+    /*!
+    @brief helper to access iterator member functions in range-based for
+
+    This function allows to access @ref iterator::key() and @ref
+    iterator::value() during range-based for loops. In these loops, a
+    reference to the JSON values is returned, so there is no access to the
+    underlying iterator.
+
+    For loop without `items()` function:
+
+    @code{cpp}
+    for (auto it = j_object.begin(); it != j_object.end(); ++it)
+    {
+        std::cout << "key: " << it.key() << ", value:" << it.value() << '\n';
+    }
+    @endcode
+
+    Range-based for loop without `items()` function:
+
+    @code{cpp}
+    for (auto it : j_object)
+    {
+        // "it" is of type json::reference and has no key() member
+        std::cout << "value: " << it << '\n';
+    }
+    @endcode
+
+    Range-based for loop with `items()` function:
+
+    @code{cpp}
+    for (auto& el : j_object.items())
+    {
+        std::cout << "key: " << el.key() << ", value:" << el.value() << '\n';
+    }
+    @endcode
+
+    The `items()` function also allows to use
+    [structured bindings](https://en.cppreference.com/w/cpp/language/structured_binding)
+    (C++17):
+
+    @code{cpp}
+    for (auto& [key, val] : j_object.items())
+    {
+        std::cout << "key: " << key << ", value:" << val << '\n';
+    }
+    @endcode
+
+    @note When iterating over an array, `key()` will return the index of the
+          element as string (see example). For primitive types (e.g., numbers),
+          `key()` returns an empty string.
+
+    @warning Using `items()` on temporary objects is dangerous. Make sure the
+             object's lifetime exeeds the iteration. See
+             <https://github.com/nlohmann/json/issues/2040> for more
+             information.
+
+    @return iteration proxy object wrapping @a ref with an interface to use in
+            range-based for loops
+
+    @liveexample{The following code shows how the function is used.,items}
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Constant.
+
+    @since version 3.1.0, structured bindings support since 3.5.0.
+    */
+    iteration_proxy<iterator> items() noexcept
+    {
+        return iteration_proxy<iterator>(*this);
+    }
+
+    /*!
+    @copydoc items()
+    */
+    iteration_proxy<const_iterator> items() const noexcept
+    {
+        return iteration_proxy<const_iterator>(*this);
+    }
+
+    /// @}
+
+
+    //////////////
+    // capacity //
+    //////////////
+
+    /// @name capacity
+    /// @{
+
+    /*!
+    @brief checks whether the container is empty.
+
+    Checks if a JSON value has no elements (i.e. whether its @ref size is `0`).
+
+    @return The return value depends on the different types and is
+            defined as follows:
+            Value type  | return value
+            ----------- | -------------
+            null        | `true`
+            boolean     | `false`
+            string      | `false`
+            number      | `false`
+            binary      | `false`
+            object      | result of function `object_t::empty()`
+            array       | result of function `array_t::empty()`
+
+    @liveexample{The following code uses `empty()` to check if a JSON
+    object contains any elements.,empty}
+
+    @complexity Constant, as long as @ref array_t and @ref object_t satisfy
+    the Container concept; that is, their `empty()` functions have constant
+    complexity.
+
+    @iterators No changes.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @note This function does not return whether a string stored as JSON value
+    is empty - it returns whether the JSON container itself is empty which is
+    false in the case of a string.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `begin() == end()`.
+
+    @sa see @ref size() -- returns the number of elements
+
+    @since version 1.0.0
+    */
+    bool empty() const noexcept
+    {
+        switch (m_type)
+        {
+            case value_t::null:
+            {
+                // null values are empty
+                return true;
+            }
+
+            case value_t::array:
+            {
+                // delegate call to array_t::empty()
+                return m_value.array->empty();
+            }
+
+            case value_t::object:
+            {
+                // delegate call to object_t::empty()
+                return m_value.object->empty();
+            }
+
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                // all other types are nonempty
+                return false;
+            }
+        }
+    }
+
+    /*!
+    @brief returns the number of elements
+
+    Returns the number of elements in a JSON value.
+
+    @return The return value depends on the different types and is
+            defined as follows:
+            Value type  | return value
+            ----------- | -------------
+            null        | `0`
+            boolean     | `1`
+            string      | `1`
+            number      | `1`
+            binary      | `1`
+            object      | result of function object_t::size()
+            array       | result of function array_t::size()
+
+    @liveexample{The following code calls `size()` on the different value
+    types.,size}
+
+    @complexity Constant, as long as @ref array_t and @ref object_t satisfy
+    the Container concept; that is, their size() functions have constant
+    complexity.
+
+    @iterators No changes.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @note This function does not return the length of a string stored as JSON
+    value - it returns the number of elements in the JSON value which is 1 in
+    the case of a string.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of `std::distance(begin(), end())`.
+
+    @sa see @ref empty() -- checks whether the container is empty
+    @sa see @ref max_size() -- returns the maximal number of elements
+
+    @since version 1.0.0
+    */
+    size_type size() const noexcept
+    {
+        switch (m_type)
+        {
+            case value_t::null:
+            {
+                // null values are empty
+                return 0;
+            }
+
+            case value_t::array:
+            {
+                // delegate call to array_t::size()
+                return m_value.array->size();
+            }
+
+            case value_t::object:
+            {
+                // delegate call to object_t::size()
+                return m_value.object->size();
+            }
+
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                // all other types have size 1
+                return 1;
+            }
+        }
+    }
+
+    /*!
+    @brief returns the maximum possible number of elements
+
+    Returns the maximum number of elements a JSON value is able to hold due to
+    system or library implementation limitations, i.e. `std::distance(begin(),
+    end())` for the JSON value.
+
+    @return The return value depends on the different types and is
+            defined as follows:
+            Value type  | return value
+            ----------- | -------------
+            null        | `0` (same as `size()`)
+            boolean     | `1` (same as `size()`)
+            string      | `1` (same as `size()`)
+            number      | `1` (same as `size()`)
+            binary      | `1` (same as `size()`)
+            object      | result of function `object_t::max_size()`
+            array       | result of function `array_t::max_size()`
+
+    @liveexample{The following code calls `max_size()` on the different value
+    types. Note the output is implementation specific.,max_size}
+
+    @complexity Constant, as long as @ref array_t and @ref object_t satisfy
+    the Container concept; that is, their `max_size()` functions have constant
+    complexity.
+
+    @iterators No changes.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @requirement This function helps `basic_json` satisfying the
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
+    requirements:
+    - The complexity is constant.
+    - Has the semantics of returning `b.size()` where `b` is the largest
+      possible JSON value.
+
+    @sa see @ref size() -- returns the number of elements
+
+    @since version 1.0.0
+    */
+    size_type max_size() const noexcept
+    {
+        switch (m_type)
+        {
+            case value_t::array:
+            {
+                // delegate call to array_t::max_size()
+                return m_value.array->max_size();
+            }
+
+            case value_t::object:
+            {
+                // delegate call to object_t::max_size()
+                return m_value.object->max_size();
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                // all other types have max_size() == size()
+                return size();
+            }
+        }
+    }
+
+    /// @}
+
+
+    ///////////////
+    // modifiers //
+    ///////////////
+
+    /// @name modifiers
+    /// @{
+
+    /*!
+    @brief clears the contents
+
+    Clears the content of a JSON value and resets it to the default value as
+    if @ref basic_json(value_t) would have been called with the current value
+    type from @ref type():
+
+    Value type  | initial value
+    ----------- | -------------
+    null        | `null`
+    boolean     | `false`
+    string      | `""`
+    number      | `0`
+    binary      | An empty byte vector
+    object      | `{}`
+    array       | `[]`
+
+    @post Has the same effect as calling
+    @code {.cpp}
+    *this = basic_json(type());
+    @endcode
+
+    @liveexample{The example below shows the effect of `clear()` to different
+    JSON types.,clear}
+
+    @complexity Linear in the size of the JSON value.
+
+    @iterators All iterators, pointers and references related to this container
+               are invalidated.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @sa see @ref basic_json(value_t) -- constructor that creates an object with the
+        same value than calling `clear()`
+
+    @since version 1.0.0
+    */
+    void clear() noexcept
+    {
+        switch (m_type)
+        {
+            case value_t::number_integer:
+            {
+                m_value.number_integer = 0;
+                break;
+            }
+
+            case value_t::number_unsigned:
+            {
+                m_value.number_unsigned = 0;
+                break;
+            }
+
+            case value_t::number_float:
+            {
+                m_value.number_float = 0.0;
+                break;
+            }
+
+            case value_t::boolean:
+            {
+                m_value.boolean = false;
+                break;
+            }
+
+            case value_t::string:
+            {
+                m_value.string->clear();
+                break;
+            }
+
+            case value_t::binary:
+            {
+                m_value.binary->clear();
+                break;
+            }
+
+            case value_t::array:
+            {
+                m_value.array->clear();
+                break;
+            }
+
+            case value_t::object:
+            {
+                m_value.object->clear();
+                break;
+            }
+
+            case value_t::null:
+            case value_t::discarded:
+            default:
+                break;
+        }
+    }
+
+    /*!
+    @brief add an object to an array
+
+    Appends the given element @a val to the end of the JSON value. If the
+    function is called on a JSON null value, an empty array is created before
+    appending @a val.
+
+    @param[in] val the value to add to the JSON array
+
+    @throw type_error.308 when called on a type other than JSON array or
+    null; example: `"cannot use push_back() with number"`
+
+    @complexity Amortized constant.
+
+    @liveexample{The example shows how `push_back()` and `+=` can be used to
+    add elements to a JSON array. Note how the `null` value was silently
+    converted to a JSON array.,push_back}
+
+    @since version 1.0.0
+    */
+    void push_back(basic_json&& val)
+    {
+        // push_back only works for null objects or arrays
+        if (JSON_HEDLEY_UNLIKELY(!(is_null() || is_array())))
+        {
+            JSON_THROW(type_error::create(308, "cannot use push_back() with " + std::string(type_name()), *this));
+        }
+
+        // transform null object into an array
+        if (is_null())
+        {
+            m_type = value_t::array;
+            m_value = value_t::array;
+            assert_invariant();
+        }
+
+        // add element to array (move semantics)
+        const auto old_capacity = m_value.array->capacity();
+        m_value.array->push_back(std::move(val));
+        set_parent(m_value.array->back(), old_capacity);
+        // if val is moved from, basic_json move constructor marks it null so we do not call the destructor
+    }
+
+    /*!
+    @brief add an object to an array
+    @copydoc push_back(basic_json&&)
+    */
+    reference operator+=(basic_json&& val)
+    {
+        push_back(std::move(val));
+        return *this;
+    }
+
+    /*!
+    @brief add an object to an array
+    @copydoc push_back(basic_json&&)
+    */
+    void push_back(const basic_json& val)
+    {
+        // push_back only works for null objects or arrays
+        if (JSON_HEDLEY_UNLIKELY(!(is_null() || is_array())))
+        {
+            JSON_THROW(type_error::create(308, "cannot use push_back() with " + std::string(type_name()), *this));
+        }
+
+        // transform null object into an array
+        if (is_null())
+        {
+            m_type = value_t::array;
+            m_value = value_t::array;
+            assert_invariant();
+        }
+
+        // add element to array
+        const auto old_capacity = m_value.array->capacity();
+        m_value.array->push_back(val);
+        set_parent(m_value.array->back(), old_capacity);
+    }
+
+    /*!
+    @brief add an object to an array
+    @copydoc push_back(basic_json&&)
+    */
+    reference operator+=(const basic_json& val)
+    {
+        push_back(val);
+        return *this;
+    }
+
+    /*!
+    @brief add an object to an object
+
+    Inserts the given element @a val to the JSON object. If the function is
+    called on a JSON null value, an empty object is created before inserting
+    @a val.
+
+    @param[in] val the value to add to the JSON object
+
+    @throw type_error.308 when called on a type other than JSON object or
+    null; example: `"cannot use push_back() with number"`
+
+    @complexity Logarithmic in the size of the container, O(log(`size()`)).
+
+    @liveexample{The example shows how `push_back()` and `+=` can be used to
+    add elements to a JSON object. Note how the `null` value was silently
+    converted to a JSON object.,push_back__object_t__value}
+
+    @since version 1.0.0
+    */
+    void push_back(const typename object_t::value_type& val)
+    {
+        // push_back only works for null objects or objects
+        if (JSON_HEDLEY_UNLIKELY(!(is_null() || is_object())))
+        {
+            JSON_THROW(type_error::create(308, "cannot use push_back() with " + std::string(type_name()), *this));
+        }
+
+        // transform null object into an object
+        if (is_null())
+        {
+            m_type = value_t::object;
+            m_value = value_t::object;
+            assert_invariant();
+        }
+
+        // add element to object
+        auto res = m_value.object->insert(val);
+        set_parent(res.first->second);
+    }
+
+    /*!
+    @brief add an object to an object
+    @copydoc push_back(const typename object_t::value_type&)
+    */
+    reference operator+=(const typename object_t::value_type& val)
+    {
+        push_back(val);
+        return *this;
+    }
+
+    /*!
+    @brief add an object to an object
+
+    This function allows to use `push_back` with an initializer list. In case
+
+    1. the current value is an object,
+    2. the initializer list @a init contains only two elements, and
+    3. the first element of @a init is a string,
+
+    @a init is converted into an object element and added using
+    @ref push_back(const typename object_t::value_type&). Otherwise, @a init
+    is converted to a JSON value and added using @ref push_back(basic_json&&).
+
+    @param[in] init  an initializer list
+
+    @complexity Linear in the size of the initializer list @a init.
+
+    @note This function is required to resolve an ambiguous overload error,
+          because pairs like `{"key", "value"}` can be both interpreted as
+          `object_t::value_type` or `std::initializer_list<basic_json>`, see
+          https://github.com/nlohmann/json/issues/235 for more information.
+
+    @liveexample{The example shows how initializer lists are treated as
+    objects when possible.,push_back__initializer_list}
+    */
+    void push_back(initializer_list_t init)
+    {
+        if (is_object() && init.size() == 2 && (*init.begin())->is_string())
+        {
+            basic_json&& key = init.begin()->moved_or_copied();
+            push_back(typename object_t::value_type(
+                          std::move(key.get_ref<string_t&>()), (init.begin() + 1)->moved_or_copied()));
+        }
+        else
+        {
+            push_back(basic_json(init));
+        }
+    }
+
+    /*!
+    @brief add an object to an object
+    @copydoc push_back(initializer_list_t)
+    */
+    reference operator+=(initializer_list_t init)
+    {
+        push_back(init);
+        return *this;
+    }
+
+    /*!
+    @brief add an object to an array
+
+    Creates a JSON value from the passed parameters @a args to the end of the
+    JSON value. If the function is called on a JSON null value, an empty array
+    is created before appending the value created from @a args.
+
+    @param[in] args arguments to forward to a constructor of @ref basic_json
+    @tparam Args compatible types to create a @ref basic_json object
+
+    @return reference to the inserted element
+
+    @throw type_error.311 when called on a type other than JSON array or
+    null; example: `"cannot use emplace_back() with number"`
+
+    @complexity Amortized constant.
+
+    @liveexample{The example shows how `push_back()` can be used to add
+    elements to a JSON array. Note how the `null` value was silently converted
+    to a JSON array.,emplace_back}
+
+    @since version 2.0.8, returns reference since 3.7.0
+    */
+    template<class... Args>
+    reference emplace_back(Args&& ... args)
+    {
+        // emplace_back only works for null objects or arrays
+        if (JSON_HEDLEY_UNLIKELY(!(is_null() || is_array())))
+        {
+            JSON_THROW(type_error::create(311, "cannot use emplace_back() with " + std::string(type_name()), *this));
+        }
+
+        // transform null object into an array
+        if (is_null())
+        {
+            m_type = value_t::array;
+            m_value = value_t::array;
+            assert_invariant();
+        }
+
+        // add element to array (perfect forwarding)
+        const auto old_capacity = m_value.array->capacity();
+        m_value.array->emplace_back(std::forward<Args>(args)...);
+        return set_parent(m_value.array->back(), old_capacity);
+    }
+
+    /*!
+    @brief add an object to an object if key does not exist
+
+    Inserts a new element into a JSON object constructed in-place with the
+    given @a args if there is no element with the key in the container. If the
+    function is called on a JSON null value, an empty object is created before
+    appending the value created from @a args.
+
+    @param[in] args arguments to forward to a constructor of @ref basic_json
+    @tparam Args compatible types to create a @ref basic_json object
+
+    @return a pair consisting of an iterator to the inserted element, or the
+            already-existing element if no insertion happened, and a bool
+            denoting whether the insertion took place.
+
+    @throw type_error.311 when called on a type other than JSON object or
+    null; example: `"cannot use emplace() with number"`
+
+    @complexity Logarithmic in the size of the container, O(log(`size()`)).
+
+    @liveexample{The example shows how `emplace()` can be used to add elements
+    to a JSON object. Note how the `null` value was silently converted to a
+    JSON object. Further note how no value is added if there was already one
+    value stored with the same key.,emplace}
+
+    @since version 2.0.8
+    */
+    template<class... Args>
+    std::pair<iterator, bool> emplace(Args&& ... args)
+    {
+        // emplace only works for null objects or arrays
+        if (JSON_HEDLEY_UNLIKELY(!(is_null() || is_object())))
+        {
+            JSON_THROW(type_error::create(311, "cannot use emplace() with " + std::string(type_name()), *this));
+        }
+
+        // transform null object into an object
+        if (is_null())
+        {
+            m_type = value_t::object;
+            m_value = value_t::object;
+            assert_invariant();
+        }
+
+        // add element to array (perfect forwarding)
+        auto res = m_value.object->emplace(std::forward<Args>(args)...);
+        set_parent(res.first->second);
+
+        // create result iterator and set iterator to the result of emplace
+        auto it = begin();
+        it.m_it.object_iterator = res.first;
+
+        // return pair of iterator and boolean
+        return {it, res.second};
+    }
+
+    /// Helper for insertion of an iterator
+    /// @note: This uses std::distance to support GCC 4.8,
+    ///        see https://github.com/nlohmann/json/pull/1257
+    template<typename... Args>
+    iterator insert_iterator(const_iterator pos, Args&& ... args)
+    {
+        iterator result(this);
+        JSON_ASSERT(m_value.array != nullptr);
+
+        auto insert_pos = std::distance(m_value.array->begin(), pos.m_it.array_iterator);
+        m_value.array->insert(pos.m_it.array_iterator, std::forward<Args>(args)...);
+        result.m_it.array_iterator = m_value.array->begin() + insert_pos;
+
+        // This could have been written as:
+        // result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, cnt, val);
+        // but the return value of insert is missing in GCC 4.8, so it is written this way instead.
+
+        set_parents();
+        return result;
+    }
+
+    /*!
+    @brief inserts element
+
+    Inserts element @a val before iterator @a pos.
+
+    @param[in] pos iterator before which the content will be inserted; may be
+    the end() iterator
+    @param[in] val element to insert
+    @return iterator pointing to the inserted @a val.
+
+    @throw type_error.309 if called on JSON values other than arrays;
+    example: `"cannot use insert() with string"`
+    @throw invalid_iterator.202 if @a pos is not an iterator of *this;
+    example: `"iterator does not fit current value"`
+
+    @complexity Constant plus linear in the distance between @a pos and end of
+    the container.
+
+    @liveexample{The example shows how `insert()` is used.,insert}
+
+    @since version 1.0.0
+    */
+    iterator insert(const_iterator pos, const basic_json& val)
+    {
+        // insert only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            // check if iterator pos fits to this JSON value
+            if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
+            {
+                JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value", *this));
+            }
+
+            // insert to array and return iterator
+            return insert_iterator(pos, val);
+        }
+
+        JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief inserts element
+    @copydoc insert(const_iterator, const basic_json&)
+    */
+    iterator insert(const_iterator pos, basic_json&& val)
+    {
+        return insert(pos, val);
+    }
+
+    /*!
+    @brief inserts elements
+
+    Inserts @a cnt copies of @a val before iterator @a pos.
+
+    @param[in] pos iterator before which the content will be inserted; may be
+    the end() iterator
+    @param[in] cnt number of copies of @a val to insert
+    @param[in] val element to insert
+    @return iterator pointing to the first element inserted, or @a pos if
+    `cnt==0`
+
+    @throw type_error.309 if called on JSON values other than arrays; example:
+    `"cannot use insert() with string"`
+    @throw invalid_iterator.202 if @a pos is not an iterator of *this;
+    example: `"iterator does not fit current value"`
+
+    @complexity Linear in @a cnt plus linear in the distance between @a pos
+    and end of the container.
+
+    @liveexample{The example shows how `insert()` is used.,insert__count}
+
+    @since version 1.0.0
+    */
+    iterator insert(const_iterator pos, size_type cnt, const basic_json& val)
+    {
+        // insert only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            // check if iterator pos fits to this JSON value
+            if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
+            {
+                JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value", *this));
+            }
+
+            // insert to array and return iterator
+            return insert_iterator(pos, cnt, val);
+        }
+
+        JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name()), *this));
+    }
+
+    /*!
+    @brief inserts elements
+
+    Inserts elements from range `[first, last)` before iterator @a pos.
+
+    @param[in] pos iterator before which the content will be inserted; may be
+    the end() iterator
+    @param[in] first begin of the range of elements to insert
+    @param[in] last end of the range of elements to insert
+
+    @throw type_error.309 if called on JSON values other than arrays; example:
+    `"cannot use insert() with string"`
+    @throw invalid_iterator.202 if @a pos is not an iterator of *this;
+    example: `"iterator does not fit current value"`
+    @throw invalid_iterator.210 if @a first and @a last do not belong to the
+    same JSON value; example: `"iterators do not fit"`
+    @throw invalid_iterator.211 if @a first or @a last are iterators into
+    container for which insert is called; example: `"passed iterators may not
+    belong to container"`
+
+    @return iterator pointing to the first element inserted, or @a pos if
+    `first==last`
+
+    @complexity Linear in `std::distance(first, last)` plus linear in the
+    distance between @a pos and end of the container.
+
+    @liveexample{The example shows how `insert()` is used.,insert__range}
+
+    @since version 1.0.0
+    */
+    iterator insert(const_iterator pos, const_iterator first, const_iterator last)
+    {
+        // insert only works for arrays
+        if (JSON_HEDLEY_UNLIKELY(!is_array()))
+        {
+            JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name()), *this));
+        }
+
+        // check if iterator pos fits to this JSON value
+        if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
+        {
+            JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value", *this));
+        }
+
+        // check if range iterators belong to the same JSON object
+        if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(210, "iterators do not fit", *this));
+        }
+
+        if (JSON_HEDLEY_UNLIKELY(first.m_object == this))
+        {
+            JSON_THROW(invalid_iterator::create(211, "passed iterators may not belong to container", *this));
+        }
+
+        // insert to array and return iterator
+        return insert_iterator(pos, first.m_it.array_iterator, last.m_it.array_iterator);
+    }
+
+    /*!
+    @brief inserts elements
+
+    Inserts elements from initializer list @a ilist before iterator @a pos.
+
+    @param[in] pos iterator before which the content will be inserted; may be
+    the end() iterator
+    @param[in] ilist initializer list to insert the values from
+
+    @throw type_error.309 if called on JSON values other than arrays; example:
+    `"cannot use insert() with string"`
+    @throw invalid_iterator.202 if @a pos is not an iterator of *this;
+    example: `"iterator does not fit current value"`
+
+    @return iterator pointing to the first element inserted, or @a pos if
+    `ilist` is empty
+
+    @complexity Linear in `ilist.size()` plus linear in the distance between
+    @a pos and end of the container.
+
+    @liveexample{The example shows how `insert()` is used.,insert__ilist}
+
+    @since version 1.0.0
+    */
+    iterator insert(const_iterator pos, initializer_list_t ilist)
+    {
+        // insert only works for arrays
+        if (JSON_HEDLEY_UNLIKELY(!is_array()))
+        {
+            JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name()), *this));
+        }
+
+        // check if iterator pos fits to this JSON value
+        if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
+        {
+            JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value", *this));
+        }
+
+        // insert to array and return iterator
+        return insert_iterator(pos, ilist.begin(), ilist.end());
+    }
+
+    /*!
+    @brief inserts elements
+
+    Inserts elements from range `[first, last)`.
+
+    @param[in] first begin of the range of elements to insert
+    @param[in] last end of the range of elements to insert
+
+    @throw type_error.309 if called on JSON values other than objects; example:
+    `"cannot use insert() with string"`
+    @throw invalid_iterator.202 if iterator @a first or @a last does does not
+    point to an object; example: `"iterators first and last must point to
+    objects"`
+    @throw invalid_iterator.210 if @a first and @a last do not belong to the
+    same JSON value; example: `"iterators do not fit"`
+
+    @complexity Logarithmic: `O(N*log(size() + N))`, where `N` is the number
+    of elements to insert.
+
+    @liveexample{The example shows how `insert()` is used.,insert__range_object}
+
+    @since version 3.0.0
+    */
+    void insert(const_iterator first, const_iterator last)
+    {
+        // insert only works for objects
+        if (JSON_HEDLEY_UNLIKELY(!is_object()))
+        {
+            JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name()), *this));
+        }
+
+        // check if range iterators belong to the same JSON object
+        if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(210, "iterators do not fit", *this));
+        }
+
+        // passed iterators must belong to objects
+        if (JSON_HEDLEY_UNLIKELY(!first.m_object->is_object()))
+        {
+            JSON_THROW(invalid_iterator::create(202, "iterators first and last must point to objects", *this));
+        }
+
+        m_value.object->insert(first.m_it.object_iterator, last.m_it.object_iterator);
+    }
+
+    /*!
+    @brief updates a JSON object from another object, overwriting existing keys
+
+    Inserts all values from JSON object @a j and overwrites existing keys.
+
+    @param[in] j  JSON object to read values from
+
+    @throw type_error.312 if called on JSON values other than objects; example:
+    `"cannot use update() with string"`
+
+    @complexity O(N*log(size() + N)), where N is the number of elements to
+                insert.
+
+    @liveexample{The example shows how `update()` is used.,update}
+
+    @sa https://docs.python.org/3.6/library/stdtypes.html#dict.update
+
+    @since version 3.0.0
+    */
+    void update(const_reference j)
+    {
+        // implicitly convert null value to an empty object
+        if (is_null())
+        {
+            m_type = value_t::object;
+            m_value.object = create<object_t>();
+            assert_invariant();
+        }
+
+        if (JSON_HEDLEY_UNLIKELY(!is_object()))
+        {
+            JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(type_name()), *this));
+        }
+        if (JSON_HEDLEY_UNLIKELY(!j.is_object()))
+        {
+            JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(j.type_name()), *this));
+        }
+
+        for (auto it = j.cbegin(); it != j.cend(); ++it)
+        {
+            m_value.object->operator[](it.key()) = it.value();
+#if JSON_DIAGNOSTICS
+            m_value.object->operator[](it.key()).m_parent = this;
+#endif
+        }
+    }
+
+    /*!
+    @brief updates a JSON object from another object, overwriting existing keys
+
+    Inserts all values from from range `[first, last)` and overwrites existing
+    keys.
+
+    @param[in] first begin of the range of elements to insert
+    @param[in] last end of the range of elements to insert
+
+    @throw type_error.312 if called on JSON values other than objects; example:
+    `"cannot use update() with string"`
+    @throw invalid_iterator.202 if iterator @a first or @a last does does not
+    point to an object; example: `"iterators first and last must point to
+    objects"`
+    @throw invalid_iterator.210 if @a first and @a last do not belong to the
+    same JSON value; example: `"iterators do not fit"`
+
+    @complexity O(N*log(size() + N)), where N is the number of elements to
+                insert.
+
+    @liveexample{The example shows how `update()` is used__range.,update}
+
+    @sa https://docs.python.org/3.6/library/stdtypes.html#dict.update
+
+    @since version 3.0.0
+    */
+    void update(const_iterator first, const_iterator last)
+    {
+        // implicitly convert null value to an empty object
+        if (is_null())
+        {
+            m_type = value_t::object;
+            m_value.object = create<object_t>();
+            assert_invariant();
+        }
+
+        if (JSON_HEDLEY_UNLIKELY(!is_object()))
+        {
+            JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(type_name()), *this));
+        }
+
+        // check if range iterators belong to the same JSON object
+        if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
+        {
+            JSON_THROW(invalid_iterator::create(210, "iterators do not fit", *this));
+        }
+
+        // passed iterators must belong to objects
+        if (JSON_HEDLEY_UNLIKELY(!first.m_object->is_object()
+                                 || !last.m_object->is_object()))
+        {
+            JSON_THROW(invalid_iterator::create(202, "iterators first and last must point to objects", *this));
+        }
+
+        for (auto it = first; it != last; ++it)
+        {
+            m_value.object->operator[](it.key()) = it.value();
+#if JSON_DIAGNOSTICS
+            m_value.object->operator[](it.key()).m_parent = this;
+#endif
+        }
+    }
+
+    /*!
+    @brief exchanges the values
+
+    Exchanges the contents of the JSON value with those of @a other. Does not
+    invoke any move, copy, or swap operations on individual elements. All
+    iterators and references remain valid. The past-the-end iterator is
+    invalidated.
+
+    @param[in,out] other JSON value to exchange the contents with
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how JSON values can be swapped with
+    `swap()`.,swap__reference}
+
+    @since version 1.0.0
+    */
+    void swap(reference other) noexcept (
+        std::is_nothrow_move_constructible<value_t>::value&&
+        std::is_nothrow_move_assignable<value_t>::value&&
+        std::is_nothrow_move_constructible<json_value>::value&&
+        std::is_nothrow_move_assignable<json_value>::value
+    )
+    {
+        std::swap(m_type, other.m_type);
+        std::swap(m_value, other.m_value);
+
+        set_parents();
+        other.set_parents();
+        assert_invariant();
+    }
+
+    /*!
+    @brief exchanges the values
+
+    Exchanges the contents of the JSON value from @a left with those of @a right. Does not
+    invoke any move, copy, or swap operations on individual elements. All
+    iterators and references remain valid. The past-the-end iterator is
+    invalidated. implemented as a friend function callable via ADL.
+
+    @param[in,out] left JSON value to exchange the contents with
+    @param[in,out] right JSON value to exchange the contents with
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how JSON values can be swapped with
+    `swap()`.,swap__reference}
+
+    @since version 1.0.0
+    */
+    friend void swap(reference left, reference right) noexcept (
+        std::is_nothrow_move_constructible<value_t>::value&&
+        std::is_nothrow_move_assignable<value_t>::value&&
+        std::is_nothrow_move_constructible<json_value>::value&&
+        std::is_nothrow_move_assignable<json_value>::value
+    )
+    {
+        left.swap(right);
+    }
+
+    /*!
+    @brief exchanges the values
+
+    Exchanges the contents of a JSON array with those of @a other. Does not
+    invoke any move, copy, or swap operations on individual elements. All
+    iterators and references remain valid. The past-the-end iterator is
+    invalidated.
+
+    @param[in,out] other array to exchange the contents with
+
+    @throw type_error.310 when JSON value is not an array; example: `"cannot
+    use swap() with string"`
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how arrays can be swapped with
+    `swap()`.,swap__array_t}
+
+    @since version 1.0.0
+    */
+    void swap(array_t& other) // NOLINT(bugprone-exception-escape)
+    {
+        // swap only works for arrays
+        if (JSON_HEDLEY_LIKELY(is_array()))
+        {
+            std::swap(*(m_value.array), other);
+        }
+        else
+        {
+            JSON_THROW(type_error::create(310, "cannot use swap() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /*!
+    @brief exchanges the values
+
+    Exchanges the contents of a JSON object with those of @a other. Does not
+    invoke any move, copy, or swap operations on individual elements. All
+    iterators and references remain valid. The past-the-end iterator is
+    invalidated.
+
+    @param[in,out] other object to exchange the contents with
+
+    @throw type_error.310 when JSON value is not an object; example:
+    `"cannot use swap() with string"`
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how objects can be swapped with
+    `swap()`.,swap__object_t}
+
+    @since version 1.0.0
+    */
+    void swap(object_t& other) // NOLINT(bugprone-exception-escape)
+    {
+        // swap only works for objects
+        if (JSON_HEDLEY_LIKELY(is_object()))
+        {
+            std::swap(*(m_value.object), other);
+        }
+        else
+        {
+            JSON_THROW(type_error::create(310, "cannot use swap() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /*!
+    @brief exchanges the values
+
+    Exchanges the contents of a JSON string with those of @a other. Does not
+    invoke any move, copy, or swap operations on individual elements. All
+    iterators and references remain valid. The past-the-end iterator is
+    invalidated.
+
+    @param[in,out] other string to exchange the contents with
+
+    @throw type_error.310 when JSON value is not a string; example: `"cannot
+    use swap() with boolean"`
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how strings can be swapped with
+    `swap()`.,swap__string_t}
+
+    @since version 1.0.0
+    */
+    void swap(string_t& other) // NOLINT(bugprone-exception-escape)
+    {
+        // swap only works for strings
+        if (JSON_HEDLEY_LIKELY(is_string()))
+        {
+            std::swap(*(m_value.string), other);
+        }
+        else
+        {
+            JSON_THROW(type_error::create(310, "cannot use swap() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /*!
+    @brief exchanges the values
+
+    Exchanges the contents of a JSON string with those of @a other. Does not
+    invoke any move, copy, or swap operations on individual elements. All
+    iterators and references remain valid. The past-the-end iterator is
+    invalidated.
+
+    @param[in,out] other binary to exchange the contents with
+
+    @throw type_error.310 when JSON value is not a string; example: `"cannot
+    use swap() with boolean"`
+
+    @complexity Constant.
+
+    @liveexample{The example below shows how strings can be swapped with
+    `swap()`.,swap__binary_t}
+
+    @since version 3.8.0
+    */
+    void swap(binary_t& other) // NOLINT(bugprone-exception-escape)
+    {
+        // swap only works for strings
+        if (JSON_HEDLEY_LIKELY(is_binary()))
+        {
+            std::swap(*(m_value.binary), other);
+        }
+        else
+        {
+            JSON_THROW(type_error::create(310, "cannot use swap() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /// @copydoc swap(binary_t&)
+    void swap(typename binary_t::container_type& other) // NOLINT(bugprone-exception-escape)
+    {
+        // swap only works for strings
+        if (JSON_HEDLEY_LIKELY(is_binary()))
+        {
+            std::swap(*(m_value.binary), other);
+        }
+        else
+        {
+            JSON_THROW(type_error::create(310, "cannot use swap() with " + std::string(type_name()), *this));
+        }
+    }
+
+    /// @}
+
+  public:
+    //////////////////////////////////////////
+    // lexicographical comparison operators //
+    //////////////////////////////////////////
+
+    /// @name lexicographical comparison operators
+    /// @{
+
+    /*!
+    @brief comparison: equal
+
+    Compares two JSON values for equality according to the following rules:
+    - Two JSON values are equal if (1) they are from the same type and (2)
+      their stored values are the same according to their respective
+      `operator==`.
+    - Integer and floating-point numbers are automatically converted before
+      comparison. Note that two NaN values are always treated as unequal.
+    - Two JSON null values are equal.
+
+    @note Floating-point inside JSON values numbers are compared with
+    `json::number_float_t::operator==` which is `double::operator==` by
+    default. To compare floating-point while respecting an epsilon, an alternative
+    [comparison function](https://github.com/mariokonrad/marnav/blob/master/include/marnav/math/floatingpoint.hpp#L34-#L39)
+    could be used, for instance
+    @code {.cpp}
+    template<typename T, typename = typename std::enable_if<std::is_floating_point<T>::value, T>::type>
+    inline bool is_same(T a, T b, T epsilon = std::numeric_limits<T>::epsilon()) noexcept
+    {
+        return std::abs(a - b) <= epsilon;
+    }
+    @endcode
+    Or you can self-defined operator equal function like this:
+    @code {.cpp}
+    bool my_equal(const_reference lhs, const_reference rhs) {
+    const auto lhs_type lhs.type();
+    const auto rhs_type rhs.type();
+    if (lhs_type == rhs_type) {
+        switch(lhs_type)
+            // self_defined case
+            case value_t::number_float:
+                return std::abs(lhs - rhs) <= std::numeric_limits<float>::epsilon();
+            // other cases remain the same with the original
+            ...
+    }
+    ...
+    }
+    @endcode
+
+    @note NaN values never compare equal to themselves or to other NaN values.
+
+    @param[in] lhs  first JSON value to consider
+    @param[in] rhs  second JSON value to consider
+    @return whether the values @a lhs and @a rhs are equal
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @complexity Linear.
+
+    @liveexample{The example demonstrates comparing several JSON
+    types.,operator__equal}
+
+    @since version 1.0.0
+    */
+    friend bool operator==(const_reference lhs, const_reference rhs) noexcept
+    {
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
+        const auto lhs_type = lhs.type();
+        const auto rhs_type = rhs.type();
+
+        if (lhs_type == rhs_type)
+        {
+            switch (lhs_type)
+            {
+                case value_t::array:
+                    return *lhs.m_value.array == *rhs.m_value.array;
+
+                case value_t::object:
+                    return *lhs.m_value.object == *rhs.m_value.object;
+
+                case value_t::null:
+                    return true;
+
+                case value_t::string:
+                    return *lhs.m_value.string == *rhs.m_value.string;
+
+                case value_t::boolean:
+                    return lhs.m_value.boolean == rhs.m_value.boolean;
+
+                case value_t::number_integer:
+                    return lhs.m_value.number_integer == rhs.m_value.number_integer;
+
+                case value_t::number_unsigned:
+                    return lhs.m_value.number_unsigned == rhs.m_value.number_unsigned;
+
+                case value_t::number_float:
+                    return lhs.m_value.number_float == rhs.m_value.number_float;
+
+                case value_t::binary:
+                    return *lhs.m_value.binary == *rhs.m_value.binary;
+
+                case value_t::discarded:
+                default:
+                    return false;
+            }
+        }
+        else if (lhs_type == value_t::number_integer && rhs_type == value_t::number_float)
+        {
+            return static_cast<number_float_t>(lhs.m_value.number_integer) == rhs.m_value.number_float;
+        }
+        else if (lhs_type == value_t::number_float && rhs_type == value_t::number_integer)
+        {
+            return lhs.m_value.number_float == static_cast<number_float_t>(rhs.m_value.number_integer);
+        }
+        else if (lhs_type == value_t::number_unsigned && rhs_type == value_t::number_float)
+        {
+            return static_cast<number_float_t>(lhs.m_value.number_unsigned) == rhs.m_value.number_float;
+        }
+        else if (lhs_type == value_t::number_float && rhs_type == value_t::number_unsigned)
+        {
+            return lhs.m_value.number_float == static_cast<number_float_t>(rhs.m_value.number_unsigned);
+        }
+        else if (lhs_type == value_t::number_unsigned && rhs_type == value_t::number_integer)
+        {
+            return static_cast<number_integer_t>(lhs.m_value.number_unsigned) == rhs.m_value.number_integer;
+        }
+        else if (lhs_type == value_t::number_integer && rhs_type == value_t::number_unsigned)
+        {
+            return lhs.m_value.number_integer == static_cast<number_integer_t>(rhs.m_value.number_unsigned);
+        }
+
+        return false;
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+    }
+
+    /*!
+    @brief comparison: equal
+    @copydoc operator==(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator==(const_reference lhs, ScalarType rhs) noexcept
+    {
+        return lhs == basic_json(rhs);
+    }
+
+    /*!
+    @brief comparison: equal
+    @copydoc operator==(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator==(ScalarType lhs, const_reference rhs) noexcept
+    {
+        return basic_json(lhs) == rhs;
+    }
+
+    /*!
+    @brief comparison: not equal
+
+    Compares two JSON values for inequality by calculating `not (lhs == rhs)`.
+
+    @param[in] lhs  first JSON value to consider
+    @param[in] rhs  second JSON value to consider
+    @return whether the values @a lhs and @a rhs are not equal
+
+    @complexity Linear.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @liveexample{The example demonstrates comparing several JSON
+    types.,operator__notequal}
+
+    @since version 1.0.0
+    */
+    friend bool operator!=(const_reference lhs, const_reference rhs) noexcept
+    {
+        return !(lhs == rhs);
+    }
+
+    /*!
+    @brief comparison: not equal
+    @copydoc operator!=(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator!=(const_reference lhs, ScalarType rhs) noexcept
+    {
+        return lhs != basic_json(rhs);
+    }
+
+    /*!
+    @brief comparison: not equal
+    @copydoc operator!=(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator!=(ScalarType lhs, const_reference rhs) noexcept
+    {
+        return basic_json(lhs) != rhs;
+    }
+
+    /*!
+    @brief comparison: less than
+
+    Compares whether one JSON value @a lhs is less than another JSON value @a
+    rhs according to the following rules:
+    - If @a lhs and @a rhs have the same type, the values are compared using
+      the default `<` operator.
+    - Integer and floating-point numbers are automatically converted before
+      comparison
+    - In case @a lhs and @a rhs have different types, the values are ignored
+      and the order of the types is considered, see
+      @ref operator<(const value_t, const value_t).
+
+    @param[in] lhs  first JSON value to consider
+    @param[in] rhs  second JSON value to consider
+    @return whether @a lhs is less than @a rhs
+
+    @complexity Linear.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @liveexample{The example demonstrates comparing several JSON
+    types.,operator__less}
+
+    @since version 1.0.0
+    */
+    friend bool operator<(const_reference lhs, const_reference rhs) noexcept
+    {
+        const auto lhs_type = lhs.type();
+        const auto rhs_type = rhs.type();
+
+        if (lhs_type == rhs_type)
+        {
+            switch (lhs_type)
+            {
+                case value_t::array:
+                    // note parentheses are necessary, see
+                    // https://github.com/nlohmann/json/issues/1530
+                    return (*lhs.m_value.array) < (*rhs.m_value.array);
+
+                case value_t::object:
+                    return (*lhs.m_value.object) < (*rhs.m_value.object);
+
+                case value_t::null:
+                    return false;
+
+                case value_t::string:
+                    return (*lhs.m_value.string) < (*rhs.m_value.string);
+
+                case value_t::boolean:
+                    return (lhs.m_value.boolean) < (rhs.m_value.boolean);
+
+                case value_t::number_integer:
+                    return (lhs.m_value.number_integer) < (rhs.m_value.number_integer);
+
+                case value_t::number_unsigned:
+                    return (lhs.m_value.number_unsigned) < (rhs.m_value.number_unsigned);
+
+                case value_t::number_float:
+                    return (lhs.m_value.number_float) < (rhs.m_value.number_float);
+
+                case value_t::binary:
+                    return (*lhs.m_value.binary) < (*rhs.m_value.binary);
+
+                case value_t::discarded:
+                default:
+                    return false;
+            }
+        }
+        else if (lhs_type == value_t::number_integer && rhs_type == value_t::number_float)
+        {
+            return static_cast<number_float_t>(lhs.m_value.number_integer) < rhs.m_value.number_float;
+        }
+        else if (lhs_type == value_t::number_float && rhs_type == value_t::number_integer)
+        {
+            return lhs.m_value.number_float < static_cast<number_float_t>(rhs.m_value.number_integer);
+        }
+        else if (lhs_type == value_t::number_unsigned && rhs_type == value_t::number_float)
+        {
+            return static_cast<number_float_t>(lhs.m_value.number_unsigned) < rhs.m_value.number_float;
+        }
+        else if (lhs_type == value_t::number_float && rhs_type == value_t::number_unsigned)
+        {
+            return lhs.m_value.number_float < static_cast<number_float_t>(rhs.m_value.number_unsigned);
+        }
+        else if (lhs_type == value_t::number_integer && rhs_type == value_t::number_unsigned)
+        {
+            return lhs.m_value.number_integer < static_cast<number_integer_t>(rhs.m_value.number_unsigned);
+        }
+        else if (lhs_type == value_t::number_unsigned && rhs_type == value_t::number_integer)
+        {
+            return static_cast<number_integer_t>(lhs.m_value.number_unsigned) < rhs.m_value.number_integer;
+        }
+
+        // We only reach this line if we cannot compare values. In that case,
+        // we compare types. Note we have to call the operator explicitly,
+        // because MSVC has problems otherwise.
+        return operator<(lhs_type, rhs_type);
+    }
+
+    /*!
+    @brief comparison: less than
+    @copydoc operator<(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator<(const_reference lhs, ScalarType rhs) noexcept
+    {
+        return lhs < basic_json(rhs);
+    }
+
+    /*!
+    @brief comparison: less than
+    @copydoc operator<(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator<(ScalarType lhs, const_reference rhs) noexcept
+    {
+        return basic_json(lhs) < rhs;
+    }
+
+    /*!
+    @brief comparison: less than or equal
+
+    Compares whether one JSON value @a lhs is less than or equal to another
+    JSON value by calculating `not (rhs < lhs)`.
+
+    @param[in] lhs  first JSON value to consider
+    @param[in] rhs  second JSON value to consider
+    @return whether @a lhs is less than or equal to @a rhs
+
+    @complexity Linear.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @liveexample{The example demonstrates comparing several JSON
+    types.,operator__greater}
+
+    @since version 1.0.0
+    */
+    friend bool operator<=(const_reference lhs, const_reference rhs) noexcept
+    {
+        return !(rhs < lhs);
+    }
+
+    /*!
+    @brief comparison: less than or equal
+    @copydoc operator<=(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator<=(const_reference lhs, ScalarType rhs) noexcept
+    {
+        return lhs <= basic_json(rhs);
+    }
+
+    /*!
+    @brief comparison: less than or equal
+    @copydoc operator<=(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator<=(ScalarType lhs, const_reference rhs) noexcept
+    {
+        return basic_json(lhs) <= rhs;
+    }
+
+    /*!
+    @brief comparison: greater than
+
+    Compares whether one JSON value @a lhs is greater than another
+    JSON value by calculating `not (lhs <= rhs)`.
+
+    @param[in] lhs  first JSON value to consider
+    @param[in] rhs  second JSON value to consider
+    @return whether @a lhs is greater than to @a rhs
+
+    @complexity Linear.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @liveexample{The example demonstrates comparing several JSON
+    types.,operator__lessequal}
+
+    @since version 1.0.0
+    */
+    friend bool operator>(const_reference lhs, const_reference rhs) noexcept
+    {
+        return !(lhs <= rhs);
+    }
+
+    /*!
+    @brief comparison: greater than
+    @copydoc operator>(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator>(const_reference lhs, ScalarType rhs) noexcept
+    {
+        return lhs > basic_json(rhs);
+    }
+
+    /*!
+    @brief comparison: greater than
+    @copydoc operator>(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator>(ScalarType lhs, const_reference rhs) noexcept
+    {
+        return basic_json(lhs) > rhs;
+    }
+
+    /*!
+    @brief comparison: greater than or equal
+
+    Compares whether one JSON value @a lhs is greater than or equal to another
+    JSON value by calculating `not (lhs < rhs)`.
+
+    @param[in] lhs  first JSON value to consider
+    @param[in] rhs  second JSON value to consider
+    @return whether @a lhs is greater than or equal to @a rhs
+
+    @complexity Linear.
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @liveexample{The example demonstrates comparing several JSON
+    types.,operator__greaterequal}
+
+    @since version 1.0.0
+    */
+    friend bool operator>=(const_reference lhs, const_reference rhs) noexcept
+    {
+        return !(lhs < rhs);
+    }
+
+    /*!
+    @brief comparison: greater than or equal
+    @copydoc operator>=(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator>=(const_reference lhs, ScalarType rhs) noexcept
+    {
+        return lhs >= basic_json(rhs);
+    }
+
+    /*!
+    @brief comparison: greater than or equal
+    @copydoc operator>=(const_reference, const_reference)
+    */
+    template<typename ScalarType, typename std::enable_if<
+                 std::is_scalar<ScalarType>::value, int>::type = 0>
+    friend bool operator>=(ScalarType lhs, const_reference rhs) noexcept
+    {
+        return basic_json(lhs) >= rhs;
+    }
+
+    /// @}
+
+    ///////////////////
+    // serialization //
+    ///////////////////
+
+    /// @name serialization
+    /// @{
+#ifndef JSON_NO_IO
+    /*!
+    @brief serialize to stream
+
+    Serialize the given JSON value @a j to the output stream @a o. The JSON
+    value will be serialized using the @ref dump member function.
+
+    - The indentation of the output can be controlled with the member variable
+      `width` of the output stream @a o. For instance, using the manipulator
+      `std::setw(4)` on @a o sets the indentation level to `4` and the
+      serialization result is the same as calling `dump(4)`.
+
+    - The indentation character can be controlled with the member variable
+      `fill` of the output stream @a o. For instance, the manipulator
+      `std::setfill('\\t')` sets indentation to use a tab character rather than
+      the default space character.
+
+    @param[in,out] o  stream to serialize to
+    @param[in] j  JSON value to serialize
+
+    @return the stream @a o
+
+    @throw type_error.316 if a string stored inside the JSON value is not
+                          UTF-8 encoded
+
+    @complexity Linear.
+
+    @liveexample{The example below shows the serialization with different
+    parameters to `width` to adjust the indentation level.,operator_serialize}
+
+    @since version 1.0.0; indentation character added in version 3.0.0
+    */
+    friend std::ostream& operator<<(std::ostream& o, const basic_json& j)
+    {
+        // read width member and use it as indentation parameter if nonzero
+        const bool pretty_print = o.width() > 0;
+        const auto indentation = pretty_print ? o.width() : 0;
+
+        // reset width to 0 for subsequent calls to this stream
+        o.width(0);
+
+        // do the actual serialization
+        serializer s(detail::output_adapter<char>(o), o.fill());
+        s.dump(j, pretty_print, false, static_cast<unsigned int>(indentation));
+        return o;
+    }
+
+    /*!
+    @brief serialize to stream
+    @deprecated This stream operator is deprecated and will be removed in
+                future 4.0.0 of the library. Please use
+                @ref operator<<(std::ostream&, const basic_json&)
+                instead; that is, replace calls like `j >> o;` with `o << j;`.
+    @since version 1.0.0; deprecated since version 3.0.0
+    */
+    JSON_HEDLEY_DEPRECATED_FOR(3.0.0, operator<<(std::ostream&, const basic_json&))
+    friend std::ostream& operator>>(const basic_json& j, std::ostream& o)
+    {
+        return o << j;
+    }
+#endif  // JSON_NO_IO
+    /// @}
+
+
+    /////////////////////
+    // deserialization //
+    /////////////////////
+
+    /// @name deserialization
+    /// @{
+
+    /*!
+    @brief deserialize from a compatible input
+
+    @tparam InputType A compatible input, for instance
+    - an std::istream object
+    - a FILE pointer
+    - a C-style array of characters
+    - a pointer to a null-terminated string of single byte characters
+    - an object obj for which begin(obj) and end(obj) produces a valid pair of
+      iterators.
+
+    @param[in] i  input to read from
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
+    which is used to control the deserialization by filtering unwanted values
+    (optional)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+    @param[in] ignore_comments  whether comments should be ignored and treated
+    like whitespace (true) or yield a parse error (true); (optional, false by
+    default)
+
+    @return deserialized JSON value; in case of a parse error and
+            @a allow_exceptions set to `false`, the return value will be
+            value_t::discarded.
+
+    @throw parse_error.101 if a parse error occurs; example: `""unexpected end
+    of input; expected string literal""`
+    @throw parse_error.102 if to_unicode fails or surrogate error
+    @throw parse_error.103 if to_unicode fails
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the parser callback function
+    @a cb or reading from the input @a i has a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from an array.,parse__array__parser_callback_t}
+
+    @liveexample{The example below demonstrates the `parse()` function with
+    and without callback function.,parse__string__parser_callback_t}
+
+    @liveexample{The example below demonstrates the `parse()` function with
+    and without callback function.,parse__istream__parser_callback_t}
+
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from a contiguous container.,parse__contiguouscontainer__parser_callback_t}
+
+    @since version 2.0.3 (contiguous containers); version 3.9.0 allowed to
+    ignore comments.
+    */
+    template<typename InputType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json parse(InputType&& i,
+                            const parser_callback_t cb = nullptr,
+                            const bool allow_exceptions = true,
+                            const bool ignore_comments = false)
+    {
+        basic_json result;
+        parser(detail::input_adapter(std::forward<InputType>(i)), cb, allow_exceptions, ignore_comments).parse(true, result);
+        return result;
+    }
+
+    /*!
+    @brief deserialize from a pair of character iterators
+
+    The value_type of the iterator must be a integral type with size of 1, 2 or
+    4 bytes, which will be interpreted respectively as UTF-8, UTF-16 and UTF-32.
+
+    @param[in] first iterator to start of character range
+    @param[in] last  iterator to end of character range
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
+    which is used to control the deserialization by filtering unwanted values
+    (optional)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+    @param[in] ignore_comments  whether comments should be ignored and treated
+    like whitespace (true) or yield a parse error (true); (optional, false by
+    default)
+
+    @return deserialized JSON value; in case of a parse error and
+            @a allow_exceptions set to `false`, the return value will be
+            value_t::discarded.
+
+    @throw parse_error.101 if a parse error occurs; example: `""unexpected end
+    of input; expected string literal""`
+    @throw parse_error.102 if to_unicode fails or surrogate error
+    @throw parse_error.103 if to_unicode fails
+    */
+    template<typename IteratorType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json parse(IteratorType first,
+                            IteratorType last,
+                            const parser_callback_t cb = nullptr,
+                            const bool allow_exceptions = true,
+                            const bool ignore_comments = false)
+    {
+        basic_json result;
+        parser(detail::input_adapter(std::move(first), std::move(last)), cb, allow_exceptions, ignore_comments).parse(true, result);
+        return result;
+    }
+
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, parse(ptr, ptr + len))
+    static basic_json parse(detail::span_input_adapter&& i,
+                            const parser_callback_t cb = nullptr,
+                            const bool allow_exceptions = true,
+                            const bool ignore_comments = false)
+    {
+        basic_json result;
+        parser(i.get(), cb, allow_exceptions, ignore_comments).parse(true, result);
+        return result;
+    }
+
+    /*!
+    @brief check if the input is valid JSON
+
+    Unlike the @ref parse(InputType&&, const parser_callback_t,const bool)
+    function, this function neither throws an exception in case of invalid JSON
+    input (i.e., a parse error) nor creates diagnostic information.
+
+    @tparam InputType A compatible input, for instance
+    - an std::istream object
+    - a FILE pointer
+    - a C-style array of characters
+    - a pointer to a null-terminated string of single byte characters
+    - an object obj for which begin(obj) and end(obj) produces a valid pair of
+      iterators.
+
+    @param[in] i input to read from
+    @param[in] ignore_comments  whether comments should be ignored and treated
+    like whitespace (true) or yield a parse error (true); (optional, false by
+    default)
+
+    @return Whether the input read from @a i is valid JSON.
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `accept()` function reading
+    from a string.,accept__string}
+    */
+    template<typename InputType>
+    static bool accept(InputType&& i,
+                       const bool ignore_comments = false)
+    {
+        return parser(detail::input_adapter(std::forward<InputType>(i)), nullptr, false, ignore_comments).accept(true);
+    }
+
+    template<typename IteratorType>
+    static bool accept(IteratorType first, IteratorType last,
+                       const bool ignore_comments = false)
+    {
+        return parser(detail::input_adapter(std::move(first), std::move(last)), nullptr, false, ignore_comments).accept(true);
+    }
+
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, accept(ptr, ptr + len))
+    static bool accept(detail::span_input_adapter&& i,
+                       const bool ignore_comments = false)
+    {
+        return parser(i.get(), nullptr, false, ignore_comments).accept(true);
+    }
+
+    /*!
+    @brief generate SAX events
+
+    The SAX event lister must follow the interface of @ref json_sax.
+
+    This function reads from a compatible input. Examples are:
+    - an std::istream object
+    - a FILE pointer
+    - a C-style array of characters
+    - a pointer to a null-terminated string of single byte characters
+    - an object obj for which begin(obj) and end(obj) produces a valid pair of
+      iterators.
+
+    @param[in] i  input to read from
+    @param[in,out] sax  SAX event listener
+    @param[in] format  the format to parse (JSON, CBOR, MessagePack, or UBJSON)
+    @param[in] strict  whether the input has to be consumed completely
+    @param[in] ignore_comments  whether comments should be ignored and treated
+    like whitespace (true) or yield a parse error (true); (optional, false by
+    default); only applies to the JSON file format.
+
+    @return return value of the last processed SAX event
+
+    @throw parse_error.101 if a parse error occurs; example: `""unexpected end
+    of input; expected string literal""`
+    @throw parse_error.102 if to_unicode fails or surrogate error
+    @throw parse_error.103 if to_unicode fails
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the SAX consumer @a sax has
+    a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `sax_parse()` function
+    reading from string and processing the events with a user-defined SAX
+    event consumer.,sax_parse}
+
+    @since version 3.2.0
+    */
+    template <typename InputType, typename SAX>
+    JSON_HEDLEY_NON_NULL(2)
+    static bool sax_parse(InputType&& i, SAX* sax,
+                          input_format_t format = input_format_t::json,
+                          const bool strict = true,
+                          const bool ignore_comments = false)
+    {
+        auto ia = detail::input_adapter(std::forward<InputType>(i));
+        return format == input_format_t::json
+               ? parser(std::move(ia), nullptr, true, ignore_comments).sax_parse(sax, strict)
+               : detail::binary_reader<basic_json, decltype(ia), SAX>(std::move(ia)).sax_parse(format, sax, strict);
+    }
+
+    template<class IteratorType, class SAX>
+    JSON_HEDLEY_NON_NULL(3)
+    static bool sax_parse(IteratorType first, IteratorType last, SAX* sax,
+                          input_format_t format = input_format_t::json,
+                          const bool strict = true,
+                          const bool ignore_comments = false)
+    {
+        auto ia = detail::input_adapter(std::move(first), std::move(last));
+        return format == input_format_t::json
+               ? parser(std::move(ia), nullptr, true, ignore_comments).sax_parse(sax, strict)
+               : detail::binary_reader<basic_json, decltype(ia), SAX>(std::move(ia)).sax_parse(format, sax, strict);
+    }
+
+    template <typename SAX>
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, sax_parse(ptr, ptr + len, ...))
+    JSON_HEDLEY_NON_NULL(2)
+    static bool sax_parse(detail::span_input_adapter&& i, SAX* sax,
+                          input_format_t format = input_format_t::json,
+                          const bool strict = true,
+                          const bool ignore_comments = false)
+    {
+        auto ia = i.get();
+        return format == input_format_t::json
+               // NOLINTNEXTLINE(hicpp-move-const-arg,performance-move-const-arg)
+               ? parser(std::move(ia), nullptr, true, ignore_comments).sax_parse(sax, strict)
+               // NOLINTNEXTLINE(hicpp-move-const-arg,performance-move-const-arg)
+               : detail::binary_reader<basic_json, decltype(ia), SAX>(std::move(ia)).sax_parse(format, sax, strict);
+    }
+#ifndef JSON_NO_IO
+    /*!
+    @brief deserialize from stream
+    @deprecated This stream operator is deprecated and will be removed in
+                version 4.0.0 of the library. Please use
+                @ref operator>>(std::istream&, basic_json&)
+                instead; that is, replace calls like `j << i;` with `i >> j;`.
+    @since version 1.0.0; deprecated since version 3.0.0
+    */
+    JSON_HEDLEY_DEPRECATED_FOR(3.0.0, operator>>(std::istream&, basic_json&))
+    friend std::istream& operator<<(basic_json& j, std::istream& i)
+    {
+        return operator>>(i, j);
+    }
+
+    /*!
+    @brief deserialize from stream
+
+    Deserializes an input stream to a JSON value.
+
+    @param[in,out] i  input stream to read a serialized JSON value from
+    @param[in,out] j  JSON value to write the deserialized input to
+
+    @throw parse_error.101 in case of an unexpected token
+    @throw parse_error.102 if to_unicode fails or surrogate error
+    @throw parse_error.103 if to_unicode fails
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below shows how a JSON value is constructed by
+    reading a serialization from a stream.,operator_deserialize}
+
+    @sa parse(std::istream&, const parser_callback_t) for a variant with a
+    parser callback function to filter values while parsing
+
+    @since version 1.0.0
+    */
+    friend std::istream& operator>>(std::istream& i, basic_json& j)
+    {
+        parser(detail::input_adapter(i)).parse(false, j);
+        return i;
+    }
+#endif  // JSON_NO_IO
+    /// @}
+
+    ///////////////////////////
+    // convenience functions //
+    ///////////////////////////
+
+    /*!
+    @brief return the type as string
+
+    Returns the type name as string to be used in error messages - usually to
+    indicate that a function was called on a wrong JSON type.
+
+    @return a string representation of a the @a m_type member:
+            Value type  | return value
+            ----------- | -------------
+            null        | `"null"`
+            boolean     | `"boolean"`
+            string      | `"string"`
+            number      | `"number"` (for all number types)
+            object      | `"object"`
+            array       | `"array"`
+            binary      | `"binary"`
+            discarded   | `"discarded"`
+
+    @exceptionsafety No-throw guarantee: this function never throws exceptions.
+
+    @complexity Constant.
+
+    @liveexample{The following code exemplifies `type_name()` for all JSON
+    types.,type_name}
+
+    @sa see @ref type() -- return the type of the JSON value
+    @sa see @ref operator value_t() -- return the type of the JSON value (implicit)
+
+    @since version 1.0.0, public since 2.1.0, `const char*` and `noexcept`
+    since 3.0.0
+    */
+    JSON_HEDLEY_RETURNS_NON_NULL
+    const char* type_name() const noexcept
+    {
+        {
+            switch (m_type)
+            {
+                case value_t::null:
+                    return "null";
+                case value_t::object:
+                    return "object";
+                case value_t::array:
+                    return "array";
+                case value_t::string:
+                    return "string";
+                case value_t::boolean:
+                    return "boolean";
+                case value_t::binary:
+                    return "binary";
+                case value_t::discarded:
+                    return "discarded";
+                case value_t::number_integer:
+                case value_t::number_unsigned:
+                case value_t::number_float:
+                default:
+                    return "number";
+            }
+        }
+    }
+
+
+  JSON_PRIVATE_UNLESS_TESTED:
+    //////////////////////
+    // member variables //
+    //////////////////////
+
+    /// the type of the current element
+    value_t m_type = value_t::null;
+
+    /// the value of the current element
+    json_value m_value = {};
+
+#if JSON_DIAGNOSTICS
+    /// a pointer to a parent value (for debugging purposes)
+    basic_json* m_parent = nullptr;
+#endif
+
+    //////////////////////////////////////////
+    // binary serialization/deserialization //
+    //////////////////////////////////////////
+
+    /// @name binary serialization/deserialization support
+    /// @{
+
+  public:
+    /*!
+    @brief create a CBOR serialization of a given JSON value
+
+    Serializes a given JSON value @a j to a byte vector using the CBOR (Concise
+    Binary Object Representation) serialization format. CBOR is a binary
+    serialization format which aims to be more compact than JSON itself, yet
+    more efficient to parse.
+
+    The library uses the following mapping from JSON values types to
+    CBOR types according to the CBOR specification (RFC 7049):
+
+    JSON value type | value/range                                | CBOR type                          | first byte
+    --------------- | ------------------------------------------ | ---------------------------------- | ---------------
+    null            | `null`                                     | Null                               | 0xF6
+    boolean         | `true`                                     | True                               | 0xF5
+    boolean         | `false`                                    | False                              | 0xF4
+    number_integer  | -9223372036854775808..-2147483649          | Negative integer (8 bytes follow)  | 0x3B
+    number_integer  | -2147483648..-32769                        | Negative integer (4 bytes follow)  | 0x3A
+    number_integer  | -32768..-129                               | Negative integer (2 bytes follow)  | 0x39
+    number_integer  | -128..-25                                  | Negative integer (1 byte follow)   | 0x38
+    number_integer  | -24..-1                                    | Negative integer                   | 0x20..0x37
+    number_integer  | 0..23                                      | Integer                            | 0x00..0x17
+    number_integer  | 24..255                                    | Unsigned integer (1 byte follow)   | 0x18
+    number_integer  | 256..65535                                 | Unsigned integer (2 bytes follow)  | 0x19
+    number_integer  | 65536..4294967295                          | Unsigned integer (4 bytes follow)  | 0x1A
+    number_integer  | 4294967296..18446744073709551615           | Unsigned integer (8 bytes follow)  | 0x1B
+    number_unsigned | 0..23                                      | Integer                            | 0x00..0x17
+    number_unsigned | 24..255                                    | Unsigned integer (1 byte follow)   | 0x18
+    number_unsigned | 256..65535                                 | Unsigned integer (2 bytes follow)  | 0x19
+    number_unsigned | 65536..4294967295                          | Unsigned integer (4 bytes follow)  | 0x1A
+    number_unsigned | 4294967296..18446744073709551615           | Unsigned integer (8 bytes follow)  | 0x1B
+    number_float    | *any value representable by a float*       | Single-Precision Float             | 0xFA
+    number_float    | *any value NOT representable by a float*   | Double-Precision Float             | 0xFB
+    string          | *length*: 0..23                            | UTF-8 string                       | 0x60..0x77
+    string          | *length*: 23..255                          | UTF-8 string (1 byte follow)       | 0x78
+    string          | *length*: 256..65535                       | UTF-8 string (2 bytes follow)      | 0x79
+    string          | *length*: 65536..4294967295                | UTF-8 string (4 bytes follow)      | 0x7A
+    string          | *length*: 4294967296..18446744073709551615 | UTF-8 string (8 bytes follow)      | 0x7B
+    array           | *size*: 0..23                              | array                              | 0x80..0x97
+    array           | *size*: 23..255                            | array (1 byte follow)              | 0x98
+    array           | *size*: 256..65535                         | array (2 bytes follow)             | 0x99
+    array           | *size*: 65536..4294967295                  | array (4 bytes follow)             | 0x9A
+    array           | *size*: 4294967296..18446744073709551615   | array (8 bytes follow)             | 0x9B
+    object          | *size*: 0..23                              | map                                | 0xA0..0xB7
+    object          | *size*: 23..255                            | map (1 byte follow)                | 0xB8
+    object          | *size*: 256..65535                         | map (2 bytes follow)               | 0xB9
+    object          | *size*: 65536..4294967295                  | map (4 bytes follow)               | 0xBA
+    object          | *size*: 4294967296..18446744073709551615   | map (8 bytes follow)               | 0xBB
+    binary          | *size*: 0..23                              | byte string                        | 0x40..0x57
+    binary          | *size*: 23..255                            | byte string (1 byte follow)        | 0x58
+    binary          | *size*: 256..65535                         | byte string (2 bytes follow)       | 0x59
+    binary          | *size*: 65536..4294967295                  | byte string (4 bytes follow)       | 0x5A
+    binary          | *size*: 4294967296..18446744073709551615   | byte string (8 bytes follow)       | 0x5B
+
+    Binary values with subtype are mapped to tagged values (0xD8..0xDB)
+    depending on the subtype, followed by a byte string, see "binary" cells
+    in the table above.
+
+    @note The mapping is **complete** in the sense that any JSON value type
+          can be converted to a CBOR value.
+
+    @note If NaN or Infinity are stored inside a JSON number, they are
+          serialized properly. This behavior differs from the @ref dump()
+          function which serializes NaN or Infinity to `null`.
+
+    @note The following CBOR types are not used in the conversion:
+          - UTF-8 strings terminated by "break" (0x7F)
+          - arrays terminated by "break" (0x9F)
+          - maps terminated by "break" (0xBF)
+          - byte strings terminated by "break" (0x5F)
+          - date/time (0xC0..0xC1)
+          - bignum (0xC2..0xC3)
+          - decimal fraction (0xC4)
+          - bigfloat (0xC5)
+          - expected conversions (0xD5..0xD7)
+          - simple values (0xE0..0xF3, 0xF8)
+          - undefined (0xF7)
+          - half-precision floats (0xF9)
+          - break (0xFF)
+
+    @param[in] j  JSON value to serialize
+    @return CBOR serialization as byte vector
+
+    @complexity Linear in the size of the JSON value @a j.
+
+    @liveexample{The example shows the serialization of a JSON value to a byte
+    vector in CBOR format.,to_cbor}
+
+    @sa http://cbor.io
+    @sa see @ref from_cbor(InputType&&, const bool, const bool, const cbor_tag_handler_t) for the
+        analogous deserialization
+    @sa see @ref to_msgpack(const basic_json&) for the related MessagePack format
+    @sa see @ref to_ubjson(const basic_json&, const bool, const bool) for the
+             related UBJSON format
+
+    @since version 2.0.9; compact representation of floating-point numbers
+           since version 3.8.0
+    */
+    static std::vector<std::uint8_t> to_cbor(const basic_json& j)
+    {
+        std::vector<std::uint8_t> result;
+        to_cbor(j, result);
+        return result;
+    }
+
+    static void to_cbor(const basic_json& j, detail::output_adapter<std::uint8_t> o)
+    {
+        binary_writer<std::uint8_t>(o).write_cbor(j);
+    }
+
+    static void to_cbor(const basic_json& j, detail::output_adapter<char> o)
+    {
+        binary_writer<char>(o).write_cbor(j);
+    }
+
+    /*!
+    @brief create a MessagePack serialization of a given JSON value
+
+    Serializes a given JSON value @a j to a byte vector using the MessagePack
+    serialization format. MessagePack is a binary serialization format which
+    aims to be more compact than JSON itself, yet more efficient to parse.
+
+    The library uses the following mapping from JSON values types to
+    MessagePack types according to the MessagePack specification:
+
+    JSON value type | value/range                       | MessagePack type | first byte
+    --------------- | --------------------------------- | ---------------- | ----------
+    null            | `null`                            | nil              | 0xC0
+    boolean         | `true`                            | true             | 0xC3
+    boolean         | `false`                           | false            | 0xC2
+    number_integer  | -9223372036854775808..-2147483649 | int64            | 0xD3
+    number_integer  | -2147483648..-32769               | int32            | 0xD2
+    number_integer  | -32768..-129                      | int16            | 0xD1
+    number_integer  | -128..-33                         | int8             | 0xD0
+    number_integer  | -32..-1                           | negative fixint  | 0xE0..0xFF
+    number_integer  | 0..127                            | positive fixint  | 0x00..0x7F
+    number_integer  | 128..255                          | uint 8           | 0xCC
+    number_integer  | 256..65535                        | uint 16          | 0xCD
+    number_integer  | 65536..4294967295                 | uint 32          | 0xCE
+    number_integer  | 4294967296..18446744073709551615  | uint 64          | 0xCF
+    number_unsigned | 0..127                            | positive fixint  | 0x00..0x7F
+    number_unsigned | 128..255                          | uint 8           | 0xCC
+    number_unsigned | 256..65535                        | uint 16          | 0xCD
+    number_unsigned | 65536..4294967295                 | uint 32          | 0xCE
+    number_unsigned | 4294967296..18446744073709551615  | uint 64          | 0xCF
+    number_float    | *any value representable by a float*     | float 32 | 0xCA
+    number_float    | *any value NOT representable by a float* | float 64 | 0xCB
+    string          | *length*: 0..31                   | fixstr           | 0xA0..0xBF
+    string          | *length*: 32..255                 | str 8            | 0xD9
+    string          | *length*: 256..65535              | str 16           | 0xDA
+    string          | *length*: 65536..4294967295       | str 32           | 0xDB
+    array           | *size*: 0..15                     | fixarray         | 0x90..0x9F
+    array           | *size*: 16..65535                 | array 16         | 0xDC
+    array           | *size*: 65536..4294967295         | array 32         | 0xDD
+    object          | *size*: 0..15                     | fix map          | 0x80..0x8F
+    object          | *size*: 16..65535                 | map 16           | 0xDE
+    object          | *size*: 65536..4294967295         | map 32           | 0xDF
+    binary          | *size*: 0..255                    | bin 8            | 0xC4
+    binary          | *size*: 256..65535                | bin 16           | 0xC5
+    binary          | *size*: 65536..4294967295         | bin 32           | 0xC6
+
+    @note The mapping is **complete** in the sense that any JSON value type
+          can be converted to a MessagePack value.
+
+    @note The following values can **not** be converted to a MessagePack value:
+          - strings with more than 4294967295 bytes
+          - byte strings with more than 4294967295 bytes
+          - arrays with more than 4294967295 elements
+          - objects with more than 4294967295 elements
+
+    @note Any MessagePack output created @ref to_msgpack can be successfully
+          parsed by @ref from_msgpack.
+
+    @note If NaN or Infinity are stored inside a JSON number, they are
+          serialized properly. This behavior differs from the @ref dump()
+          function which serializes NaN or Infinity to `null`.
+
+    @param[in] j  JSON value to serialize
+    @return MessagePack serialization as byte vector
+
+    @complexity Linear in the size of the JSON value @a j.
+
+    @liveexample{The example shows the serialization of a JSON value to a byte
+    vector in MessagePack format.,to_msgpack}
+
+    @sa http://msgpack.org
+    @sa see @ref from_msgpack for the analogous deserialization
+    @sa see @ref to_cbor(const basic_json& for the related CBOR format
+    @sa see @ref to_ubjson(const basic_json&, const bool, const bool) for the
+             related UBJSON format
+
+    @since version 2.0.9
+    */
+    static std::vector<std::uint8_t> to_msgpack(const basic_json& j)
+    {
+        std::vector<std::uint8_t> result;
+        to_msgpack(j, result);
+        return result;
+    }
+
+    static void to_msgpack(const basic_json& j, detail::output_adapter<std::uint8_t> o)
+    {
+        binary_writer<std::uint8_t>(o).write_msgpack(j);
+    }
+
+    static void to_msgpack(const basic_json& j, detail::output_adapter<char> o)
+    {
+        binary_writer<char>(o).write_msgpack(j);
+    }
+
+    /*!
+    @brief create a UBJSON serialization of a given JSON value
+
+    Serializes a given JSON value @a j to a byte vector using the UBJSON
+    (Universal Binary JSON) serialization format. UBJSON aims to be more compact
+    than JSON itself, yet more efficient to parse.
+
+    The library uses the following mapping from JSON values types to
+    UBJSON types according to the UBJSON specification:
+
+    JSON value type | value/range                       | UBJSON type | marker
+    --------------- | --------------------------------- | ----------- | ------
+    null            | `null`                            | null        | `Z`
+    boolean         | `true`                            | true        | `T`
+    boolean         | `false`                           | false       | `F`
+    number_integer  | -9223372036854775808..-2147483649 | int64       | `L`
+    number_integer  | -2147483648..-32769               | int32       | `l`
+    number_integer  | -32768..-129                      | int16       | `I`
+    number_integer  | -128..127                         | int8        | `i`
+    number_integer  | 128..255                          | uint8       | `U`
+    number_integer  | 256..32767                        | int16       | `I`
+    number_integer  | 32768..2147483647                 | int32       | `l`
+    number_integer  | 2147483648..9223372036854775807   | int64       | `L`
+    number_unsigned | 0..127                            | int8        | `i`
+    number_unsigned | 128..255                          | uint8       | `U`
+    number_unsigned | 256..32767                        | int16       | `I`
+    number_unsigned | 32768..2147483647                 | int32       | `l`
+    number_unsigned | 2147483648..9223372036854775807   | int64       | `L`
+    number_unsigned | 2147483649..18446744073709551615  | high-precision | `H`
+    number_float    | *any value*                       | float64     | `D`
+    string          | *with shortest length indicator*  | string      | `S`
+    array           | *see notes on optimized format*   | array       | `[`
+    object          | *see notes on optimized format*   | map         | `{`
+
+    @note The mapping is **complete** in the sense that any JSON value type
+          can be converted to a UBJSON value.
+
+    @note The following values can **not** be converted to a UBJSON value:
+          - strings with more than 9223372036854775807 bytes (theoretical)
+
+    @note The following markers are not used in the conversion:
+          - `Z`: no-op values are not created.
+          - `C`: single-byte strings are serialized with `S` markers.
+
+    @note Any UBJSON output created @ref to_ubjson can be successfully parsed
+          by @ref from_ubjson.
+
+    @note If NaN or Infinity are stored inside a JSON number, they are
+          serialized properly. This behavior differs from the @ref dump()
+          function which serializes NaN or Infinity to `null`.
+
+    @note The optimized formats for containers are supported: Parameter
+          @a use_size adds size information to the beginning of a container and
+          removes the closing marker. Parameter @a use_type further checks
+          whether all elements of a container have the same type and adds the
+          type marker to the beginning of the container. The @a use_type
+          parameter must only be used together with @a use_size = true. Note
+          that @a use_size = true alone may result in larger representations -
+          the benefit of this parameter is that the receiving side is
+          immediately informed on the number of elements of the container.
+
+    @note If the JSON data contains the binary type, the value stored is a list
+          of integers, as suggested by the UBJSON documentation.  In particular,
+          this means that serialization and the deserialization of a JSON
+          containing binary values into UBJSON and back will result in a
+          different JSON object.
+
+    @param[in] j  JSON value to serialize
+    @param[in] use_size  whether to add size annotations to container types
+    @param[in] use_type  whether to add type annotations to container types
+                         (must be combined with @a use_size = true)
+    @return UBJSON serialization as byte vector
+
+    @complexity Linear in the size of the JSON value @a j.
+
+    @liveexample{The example shows the serialization of a JSON value to a byte
+    vector in UBJSON format.,to_ubjson}
+
+    @sa http://ubjson.org
+    @sa see @ref from_ubjson(InputType&&, const bool, const bool) for the
+        analogous deserialization
+    @sa see @ref to_cbor(const basic_json& for the related CBOR format
+    @sa see @ref to_msgpack(const basic_json&) for the related MessagePack format
+
+    @since version 3.1.0
+    */
+    static std::vector<std::uint8_t> to_ubjson(const basic_json& j,
+            const bool use_size = false,
+            const bool use_type = false)
+    {
+        std::vector<std::uint8_t> result;
+        to_ubjson(j, result, use_size, use_type);
+        return result;
+    }
+
+    static void to_ubjson(const basic_json& j, detail::output_adapter<std::uint8_t> o,
+                          const bool use_size = false, const bool use_type = false)
+    {
+        binary_writer<std::uint8_t>(o).write_ubjson(j, use_size, use_type);
+    }
+
+    static void to_ubjson(const basic_json& j, detail::output_adapter<char> o,
+                          const bool use_size = false, const bool use_type = false)
+    {
+        binary_writer<char>(o).write_ubjson(j, use_size, use_type);
+    }
+
+
+    /*!
+    @brief Serializes the given JSON object `j` to BSON and returns a vector
+           containing the corresponding BSON-representation.
+
+    BSON (Binary JSON) is a binary format in which zero or more ordered key/value pairs are
+    stored as a single entity (a so-called document).
+
+    The library uses the following mapping from JSON values types to BSON types:
+
+    JSON value type | value/range                       | BSON type   | marker
+    --------------- | --------------------------------- | ----------- | ------
+    null            | `null`                            | null        | 0x0A
+    boolean         | `true`, `false`                   | boolean     | 0x08
+    number_integer  | -9223372036854775808..-2147483649 | int64       | 0x12
+    number_integer  | -2147483648..2147483647           | int32       | 0x10
+    number_integer  | 2147483648..9223372036854775807   | int64       | 0x12
+    number_unsigned | 0..2147483647                     | int32       | 0x10
+    number_unsigned | 2147483648..9223372036854775807   | int64       | 0x12
+    number_unsigned | 9223372036854775808..18446744073709551615| --   | --
+    number_float    | *any value*                       | double      | 0x01
+    string          | *any value*                       | string      | 0x02
+    array           | *any value*                       | document    | 0x04
+    object          | *any value*                       | document    | 0x03
+    binary          | *any value*                       | binary      | 0x05
+
+    @warning The mapping is **incomplete**, since only JSON-objects (and things
+    contained therein) can be serialized to BSON.
+    Also, integers larger than 9223372036854775807 cannot be serialized to BSON,
+    and the keys may not contain U+0000, since they are serialized a
+    zero-terminated c-strings.
+
+    @throw out_of_range.407  if `j.is_number_unsigned() && j.get<std::uint64_t>() > 9223372036854775807`
+    @throw out_of_range.409  if a key in `j` contains a NULL (U+0000)
+    @throw type_error.317    if `!j.is_object()`
+
+    @pre The input `j` is required to be an object: `j.is_object() == true`.
+
+    @note Any BSON output created via @ref to_bson can be successfully parsed
+          by @ref from_bson.
+
+    @param[in] j  JSON value to serialize
+    @return BSON serialization as byte vector
+
+    @complexity Linear in the size of the JSON value @a j.
+
+    @liveexample{The example shows the serialization of a JSON value to a byte
+    vector in BSON format.,to_bson}
+
+    @sa http://bsonspec.org/spec.html
+    @sa see @ref from_bson(detail::input_adapter&&, const bool strict) for the
+        analogous deserialization
+    @sa see @ref to_ubjson(const basic_json&, const bool, const bool) for the
+             related UBJSON format
+    @sa see @ref to_cbor(const basic_json&) for the related CBOR format
+    @sa see @ref to_msgpack(const basic_json&) for the related MessagePack format
+    */
+    static std::vector<std::uint8_t> to_bson(const basic_json& j)
+    {
+        std::vector<std::uint8_t> result;
+        to_bson(j, result);
+        return result;
+    }
+
+    /*!
+    @brief Serializes the given JSON object `j` to BSON and forwards the
+           corresponding BSON-representation to the given output_adapter `o`.
+    @param j The JSON object to convert to BSON.
+    @param o The output adapter that receives the binary BSON representation.
+    @pre The input `j` shall be an object: `j.is_object() == true`
+    @sa see @ref to_bson(const basic_json&)
+    */
+    static void to_bson(const basic_json& j, detail::output_adapter<std::uint8_t> o)
+    {
+        binary_writer<std::uint8_t>(o).write_bson(j);
+    }
+
+    /*!
+    @copydoc to_bson(const basic_json&, detail::output_adapter<std::uint8_t>)
+    */
+    static void to_bson(const basic_json& j, detail::output_adapter<char> o)
+    {
+        binary_writer<char>(o).write_bson(j);
+    }
+
+
+    /*!
+    @brief create a JSON value from an input in CBOR format
+
+    Deserializes a given input @a i to a JSON value using the CBOR (Concise
+    Binary Object Representation) serialization format.
+
+    The library maps CBOR types to JSON value types as follows:
+
+    CBOR type              | JSON value type | first byte
+    ---------------------- | --------------- | ----------
+    Integer                | number_unsigned | 0x00..0x17
+    Unsigned integer       | number_unsigned | 0x18
+    Unsigned integer       | number_unsigned | 0x19
+    Unsigned integer       | number_unsigned | 0x1A
+    Unsigned integer       | number_unsigned | 0x1B
+    Negative integer       | number_integer  | 0x20..0x37
+    Negative integer       | number_integer  | 0x38
+    Negative integer       | number_integer  | 0x39
+    Negative integer       | number_integer  | 0x3A
+    Negative integer       | number_integer  | 0x3B
+    Byte string            | binary          | 0x40..0x57
+    Byte string            | binary          | 0x58
+    Byte string            | binary          | 0x59
+    Byte string            | binary          | 0x5A
+    Byte string            | binary          | 0x5B
+    UTF-8 string           | string          | 0x60..0x77
+    UTF-8 string           | string          | 0x78
+    UTF-8 string           | string          | 0x79
+    UTF-8 string           | string          | 0x7A
+    UTF-8 string           | string          | 0x7B
+    UTF-8 string           | string          | 0x7F
+    array                  | array           | 0x80..0x97
+    array                  | array           | 0x98
+    array                  | array           | 0x99
+    array                  | array           | 0x9A
+    array                  | array           | 0x9B
+    array                  | array           | 0x9F
+    map                    | object          | 0xA0..0xB7
+    map                    | object          | 0xB8
+    map                    | object          | 0xB9
+    map                    | object          | 0xBA
+    map                    | object          | 0xBB
+    map                    | object          | 0xBF
+    False                  | `false`         | 0xF4
+    True                   | `true`          | 0xF5
+    Null                   | `null`          | 0xF6
+    Half-Precision Float   | number_float    | 0xF9
+    Single-Precision Float | number_float    | 0xFA
+    Double-Precision Float | number_float    | 0xFB
+
+    @warning The mapping is **incomplete** in the sense that not all CBOR
+             types can be converted to a JSON value. The following CBOR types
+             are not supported and will yield parse errors (parse_error.112):
+             - date/time (0xC0..0xC1)
+             - bignum (0xC2..0xC3)
+             - decimal fraction (0xC4)
+             - bigfloat (0xC5)
+             - expected conversions (0xD5..0xD7)
+             - simple values (0xE0..0xF3, 0xF8)
+             - undefined (0xF7)
+
+    @warning CBOR allows map keys of any type, whereas JSON only allows
+             strings as keys in object values. Therefore, CBOR maps with keys
+             other than UTF-8 strings are rejected (parse_error.113).
+
+    @note Any CBOR output created @ref to_cbor can be successfully parsed by
+          @ref from_cbor.
+
+    @param[in] i  an input in CBOR format convertible to an input adapter
+    @param[in] strict  whether to expect the input to be consumed until EOF
+                       (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+    @param[in] tag_handler how to treat CBOR tags (optional, error by default)
+
+    @return deserialized JSON value; in case of a parse error and
+            @a allow_exceptions set to `false`, the return value will be
+            value_t::discarded.
+
+    @throw parse_error.110 if the given input ends prematurely or the end of
+    file was not reached when @a strict was set to true
+    @throw parse_error.112 if unsupported features from CBOR were
+    used in the given input @a v or if the input is not valid CBOR
+    @throw parse_error.113 if a string was expected as map key, but not found
+
+    @complexity Linear in the size of the input @a i.
+
+    @liveexample{The example shows the deserialization of a byte vector in CBOR
+    format to a JSON value.,from_cbor}
+
+    @sa http://cbor.io
+    @sa see @ref to_cbor(const basic_json&) for the analogous serialization
+    @sa see @ref from_msgpack(InputType&&, const bool, const bool) for the
+        related MessagePack format
+    @sa see @ref from_ubjson(InputType&&, const bool, const bool) for the
+        related UBJSON format
+
+    @since version 2.0.9; parameter @a start_index since 2.1.1; changed to
+           consume input adapters, removed start_index parameter, and added
+           @a strict parameter since 3.0.0; added @a allow_exceptions parameter
+           since 3.2.0; added @a tag_handler parameter since 3.9.0.
+    */
+    template<typename InputType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_cbor(InputType&& i,
+                                const bool strict = true,
+                                const bool allow_exceptions = true,
+                                const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::forward<InputType>(i));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::cbor, &sdp, strict, tag_handler);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    /*!
+    @copydoc from_cbor(InputType&&, const bool, const bool, const cbor_tag_handler_t)
+    */
+    template<typename IteratorType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_cbor(IteratorType first, IteratorType last,
+                                const bool strict = true,
+                                const bool allow_exceptions = true,
+                                const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::move(first), std::move(last));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::cbor, &sdp, strict, tag_handler);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    template<typename T>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_cbor(ptr, ptr + len))
+    static basic_json from_cbor(const T* ptr, std::size_t len,
+                                const bool strict = true,
+                                const bool allow_exceptions = true,
+                                const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error)
+    {
+        return from_cbor(ptr, ptr + len, strict, allow_exceptions, tag_handler);
+    }
+
+
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_cbor(ptr, ptr + len))
+    static basic_json from_cbor(detail::span_input_adapter&& i,
+                                const bool strict = true,
+                                const bool allow_exceptions = true,
+                                const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = i.get();
+        // NOLINTNEXTLINE(hicpp-move-const-arg,performance-move-const-arg)
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::cbor, &sdp, strict, tag_handler);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    /*!
+    @brief create a JSON value from an input in MessagePack format
+
+    Deserializes a given input @a i to a JSON value using the MessagePack
+    serialization format.
+
+    The library maps MessagePack types to JSON value types as follows:
+
+    MessagePack type | JSON value type | first byte
+    ---------------- | --------------- | ----------
+    positive fixint  | number_unsigned | 0x00..0x7F
+    fixmap           | object          | 0x80..0x8F
+    fixarray         | array           | 0x90..0x9F
+    fixstr           | string          | 0xA0..0xBF
+    nil              | `null`          | 0xC0
+    false            | `false`         | 0xC2
+    true             | `true`          | 0xC3
+    float 32         | number_float    | 0xCA
+    float 64         | number_float    | 0xCB
+    uint 8           | number_unsigned | 0xCC
+    uint 16          | number_unsigned | 0xCD
+    uint 32          | number_unsigned | 0xCE
+    uint 64          | number_unsigned | 0xCF
+    int 8            | number_integer  | 0xD0
+    int 16           | number_integer  | 0xD1
+    int 32           | number_integer  | 0xD2
+    int 64           | number_integer  | 0xD3
+    str 8            | string          | 0xD9
+    str 16           | string          | 0xDA
+    str 32           | string          | 0xDB
+    array 16         | array           | 0xDC
+    array 32         | array           | 0xDD
+    map 16           | object          | 0xDE
+    map 32           | object          | 0xDF
+    bin 8            | binary          | 0xC4
+    bin 16           | binary          | 0xC5
+    bin 32           | binary          | 0xC6
+    ext 8            | binary          | 0xC7
+    ext 16           | binary          | 0xC8
+    ext 32           | binary          | 0xC9
+    fixext 1         | binary          | 0xD4
+    fixext 2         | binary          | 0xD5
+    fixext 4         | binary          | 0xD6
+    fixext 8         | binary          | 0xD7
+    fixext 16        | binary          | 0xD8
+    negative fixint  | number_integer  | 0xE0-0xFF
+
+    @note Any MessagePack output created @ref to_msgpack can be successfully
+          parsed by @ref from_msgpack.
+
+    @param[in] i  an input in MessagePack format convertible to an input
+                  adapter
+    @param[in] strict  whether to expect the input to be consumed until EOF
+                       (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
+    @return deserialized JSON value; in case of a parse error and
+            @a allow_exceptions set to `false`, the return value will be
+            value_t::discarded.
+
+    @throw parse_error.110 if the given input ends prematurely or the end of
+    file was not reached when @a strict was set to true
+    @throw parse_error.112 if unsupported features from MessagePack were
+    used in the given input @a i or if the input is not valid MessagePack
+    @throw parse_error.113 if a string was expected as map key, but not found
+
+    @complexity Linear in the size of the input @a i.
+
+    @liveexample{The example shows the deserialization of a byte vector in
+    MessagePack format to a JSON value.,from_msgpack}
+
+    @sa http://msgpack.org
+    @sa see @ref to_msgpack(const basic_json&) for the analogous serialization
+    @sa see @ref from_cbor(InputType&&, const bool, const bool, const cbor_tag_handler_t) for the
+        related CBOR format
+    @sa see @ref from_ubjson(InputType&&, const bool, const bool) for
+        the related UBJSON format
+    @sa see @ref from_bson(InputType&&, const bool, const bool) for
+        the related BSON format
+
+    @since version 2.0.9; parameter @a start_index since 2.1.1; changed to
+           consume input adapters, removed start_index parameter, and added
+           @a strict parameter since 3.0.0; added @a allow_exceptions parameter
+           since 3.2.0
+    */
+    template<typename InputType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_msgpack(InputType&& i,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::forward<InputType>(i));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::msgpack, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    /*!
+    @copydoc from_msgpack(InputType&&, const bool, const bool)
+    */
+    template<typename IteratorType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_msgpack(IteratorType first, IteratorType last,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::move(first), std::move(last));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::msgpack, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+
+    template<typename T>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_msgpack(ptr, ptr + len))
+    static basic_json from_msgpack(const T* ptr, std::size_t len,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
+    {
+        return from_msgpack(ptr, ptr + len, strict, allow_exceptions);
+    }
+
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_msgpack(ptr, ptr + len))
+    static basic_json from_msgpack(detail::span_input_adapter&& i,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = i.get();
+        // NOLINTNEXTLINE(hicpp-move-const-arg,performance-move-const-arg)
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::msgpack, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+
+    /*!
+    @brief create a JSON value from an input in UBJSON format
+
+    Deserializes a given input @a i to a JSON value using the UBJSON (Universal
+    Binary JSON) serialization format.
+
+    The library maps UBJSON types to JSON value types as follows:
+
+    UBJSON type | JSON value type                         | marker
+    ----------- | --------------------------------------- | ------
+    no-op       | *no value, next value is read*          | `N`
+    null        | `null`                                  | `Z`
+    false       | `false`                                 | `F`
+    true        | `true`                                  | `T`
+    float32     | number_float                            | `d`
+    float64     | number_float                            | `D`
+    uint8       | number_unsigned                         | `U`
+    int8        | number_integer                          | `i`
+    int16       | number_integer                          | `I`
+    int32       | number_integer                          | `l`
+    int64       | number_integer                          | `L`
+    high-precision number | number_integer, number_unsigned, or number_float - depends on number string | 'H'
+    string      | string                                  | `S`
+    char        | string                                  | `C`
+    array       | array (optimized values are supported)  | `[`
+    object      | object (optimized values are supported) | `{`
+
+    @note The mapping is **complete** in the sense that any UBJSON value can
+          be converted to a JSON value.
+
+    @param[in] i  an input in UBJSON format convertible to an input adapter
+    @param[in] strict  whether to expect the input to be consumed until EOF
+                       (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
+    @return deserialized JSON value; in case of a parse error and
+            @a allow_exceptions set to `false`, the return value will be
+            value_t::discarded.
+
+    @throw parse_error.110 if the given input ends prematurely or the end of
+    file was not reached when @a strict was set to true
+    @throw parse_error.112 if a parse error occurs
+    @throw parse_error.113 if a string could not be parsed successfully
+
+    @complexity Linear in the size of the input @a i.
+
+    @liveexample{The example shows the deserialization of a byte vector in
+    UBJSON format to a JSON value.,from_ubjson}
+
+    @sa http://ubjson.org
+    @sa see @ref to_ubjson(const basic_json&, const bool, const bool) for the
+             analogous serialization
+    @sa see @ref from_cbor(InputType&&, const bool, const bool, const cbor_tag_handler_t) for the
+        related CBOR format
+    @sa see @ref from_msgpack(InputType&&, const bool, const bool) for
+        the related MessagePack format
+    @sa see @ref from_bson(InputType&&, const bool, const bool) for
+        the related BSON format
+
+    @since version 3.1.0; added @a allow_exceptions parameter since 3.2.0
+    */
+    template<typename InputType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_ubjson(InputType&& i,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::forward<InputType>(i));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::ubjson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    /*!
+    @copydoc from_ubjson(InputType&&, const bool, const bool)
+    */
+    template<typename IteratorType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_ubjson(IteratorType first, IteratorType last,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::move(first), std::move(last));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::ubjson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    template<typename T>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_ubjson(ptr, ptr + len))
+    static basic_json from_ubjson(const T* ptr, std::size_t len,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
+    {
+        return from_ubjson(ptr, ptr + len, strict, allow_exceptions);
+    }
+
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_ubjson(ptr, ptr + len))
+    static basic_json from_ubjson(detail::span_input_adapter&& i,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = i.get();
+        // NOLINTNEXTLINE(hicpp-move-const-arg,performance-move-const-arg)
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::ubjson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+
+    /*!
+    @brief Create a JSON value from an input in BSON format
+
+    Deserializes a given input @a i to a JSON value using the BSON (Binary JSON)
+    serialization format.
+
+    The library maps BSON record types to JSON value types as follows:
+
+    BSON type       | BSON marker byte | JSON value type
+    --------------- | ---------------- | ---------------------------
+    double          | 0x01             | number_float
+    string          | 0x02             | string
+    document        | 0x03             | object
+    array           | 0x04             | array
+    binary          | 0x05             | binary
+    undefined       | 0x06             | still unsupported
+    ObjectId        | 0x07             | still unsupported
+    boolean         | 0x08             | boolean
+    UTC Date-Time   | 0x09             | still unsupported
+    null            | 0x0A             | null
+    Regular Expr.   | 0x0B             | still unsupported
+    DB Pointer      | 0x0C             | still unsupported
+    JavaScript Code | 0x0D             | still unsupported
+    Symbol          | 0x0E             | still unsupported
+    JavaScript Code | 0x0F             | still unsupported
+    int32           | 0x10             | number_integer
+    Timestamp       | 0x11             | still unsupported
+    128-bit decimal float | 0x13       | still unsupported
+    Max Key         | 0x7F             | still unsupported
+    Min Key         | 0xFF             | still unsupported
+
+    @warning The mapping is **incomplete**. The unsupported mappings
+             are indicated in the table above.
+
+    @param[in] i  an input in BSON format convertible to an input adapter
+    @param[in] strict  whether to expect the input to be consumed until EOF
+                       (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
+    @return deserialized JSON value; in case of a parse error and
+            @a allow_exceptions set to `false`, the return value will be
+            value_t::discarded.
+
+    @throw parse_error.114 if an unsupported BSON record type is encountered
+
+    @complexity Linear in the size of the input @a i.
+
+    @liveexample{The example shows the deserialization of a byte vector in
+    BSON format to a JSON value.,from_bson}
+
+    @sa http://bsonspec.org/spec.html
+    @sa see @ref to_bson(const basic_json&) for the analogous serialization
+    @sa see @ref from_cbor(InputType&&, const bool, const bool, const cbor_tag_handler_t) for the
+        related CBOR format
+    @sa see @ref from_msgpack(InputType&&, const bool, const bool) for
+        the related MessagePack format
+    @sa see @ref from_ubjson(InputType&&, const bool, const bool) for the
+        related UBJSON format
+    */
+    template<typename InputType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_bson(InputType&& i,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::forward<InputType>(i));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::bson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    /*!
+    @copydoc from_bson(InputType&&, const bool, const bool)
+    */
+    template<typename IteratorType>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json from_bson(IteratorType first, IteratorType last,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = detail::input_adapter(std::move(first), std::move(last));
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::bson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+
+    template<typename T>
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_bson(ptr, ptr + len))
+    static basic_json from_bson(const T* ptr, std::size_t len,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
+    {
+        return from_bson(ptr, ptr + len, strict, allow_exceptions);
+    }
+
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_bson(ptr, ptr + len))
+    static basic_json from_bson(detail::span_input_adapter&& i,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
+    {
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        auto ia = i.get();
+        // NOLINTNEXTLINE(hicpp-move-const-arg,performance-move-const-arg)
+        const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::bson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
+    }
+    /// @}
+
+    //////////////////////////
+    // JSON Pointer support //
+    //////////////////////////
+
+    /// @name JSON Pointer functions
+    /// @{
+
+    /*!
+    @brief access specified element via JSON Pointer
+
+    Uses a JSON pointer to retrieve a reference to the respective JSON value.
+    No bound checking is performed. Similar to @ref operator[](const typename
+    object_t::key_type&), `null` values are created in arrays and objects if
+    necessary.
+
+    In particular:
+    - If the JSON pointer points to an object key that does not exist, it
+      is created an filled with a `null` value before a reference to it
+      is returned.
+    - If the JSON pointer points to an array index that does not exist, it
+      is created an filled with a `null` value before a reference to it
+      is returned. All indices between the current maximum and the given
+      index are also filled with `null`.
+    - The special value `-` is treated as a synonym for the index past the
+      end.
+
+    @param[in] ptr  a JSON pointer
+
+    @return reference to the element pointed to by @a ptr
+
+    @complexity Constant.
+
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+    @throw out_of_range.404  if the JSON pointer can not be resolved
+
+    @liveexample{The behavior is shown in the example.,operatorjson_pointer}
+
+    @since version 2.0.0
+    */
+    reference operator[](const json_pointer& ptr)
+    {
+        return ptr.get_unchecked(this);
+    }
+
+    /*!
+    @brief access specified element via JSON Pointer
+
+    Uses a JSON pointer to retrieve a reference to the respective JSON value.
+    No bound checking is performed. The function does not change the JSON
+    value; no `null` values are created. In particular, the special value
+    `-` yields an exception.
+
+    @param[in] ptr  JSON pointer to the desired element
+
+    @return const reference to the element pointed to by @a ptr
+
+    @complexity Constant.
+
+    @throw parse_error.106   if an array index begins with '0'
+    @throw parse_error.109   if an array index was not a number
+    @throw out_of_range.402  if the array index '-' is used
+    @throw out_of_range.404  if the JSON pointer can not be resolved
+
+    @liveexample{The behavior is shown in the example.,operatorjson_pointer_const}
+
+    @since version 2.0.0
+    */
+    const_reference operator[](const json_pointer& ptr) const
+    {
+        return ptr.get_unchecked(this);
+    }
+
+    /*!
+    @brief access specified element via JSON Pointer
+
+    Returns a reference to the element at with specified JSON pointer @a ptr,
+    with bounds checking.
+
+    @param[in] ptr  JSON pointer to the desired element
+
+    @return reference to the element pointed to by @a ptr
+
+    @throw parse_error.106 if an array index in the passed JSON pointer @a ptr
+    begins with '0'. See example below.
+
+    @throw parse_error.109 if an array index in the passed JSON pointer @a ptr
+    is not a number. See example below.
+
+    @throw out_of_range.401 if an array index in the passed JSON pointer @a ptr
+    is out of range. See example below.
+
+    @throw out_of_range.402 if the array index '-' is used in the passed JSON
+    pointer @a ptr. As `at` provides checked access (and no elements are
+    implicitly inserted), the index '-' is always invalid. See example below.
+
+    @throw out_of_range.403 if the JSON pointer describes a key of an object
+    which cannot be found. See example below.
+
+    @throw out_of_range.404 if the JSON pointer @a ptr can not be resolved.
+    See example below.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Constant.
+
+    @since version 2.0.0
+
+    @liveexample{The behavior is shown in the example.,at_json_pointer}
+    */
+    reference at(const json_pointer& ptr)
+    {
+        return ptr.get_checked(this);
+    }
+
+    /*!
+    @brief access specified element via JSON Pointer
+
+    Returns a const reference to the element at with specified JSON pointer @a
+    ptr, with bounds checking.
+
+    @param[in] ptr  JSON pointer to the desired element
+
+    @return reference to the element pointed to by @a ptr
+
+    @throw parse_error.106 if an array index in the passed JSON pointer @a ptr
+    begins with '0'. See example below.
+
+    @throw parse_error.109 if an array index in the passed JSON pointer @a ptr
+    is not a number. See example below.
+
+    @throw out_of_range.401 if an array index in the passed JSON pointer @a ptr
+    is out of range. See example below.
+
+    @throw out_of_range.402 if the array index '-' is used in the passed JSON
+    pointer @a ptr. As `at` provides checked access (and no elements are
+    implicitly inserted), the index '-' is always invalid. See example below.
+
+    @throw out_of_range.403 if the JSON pointer describes a key of an object
+    which cannot be found. See example below.
+
+    @throw out_of_range.404 if the JSON pointer @a ptr can not be resolved.
+    See example below.
+
+    @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+    changes in the JSON value.
+
+    @complexity Constant.
+
+    @since version 2.0.0
+
+    @liveexample{The behavior is shown in the example.,at_json_pointer_const}
+    */
+    const_reference at(const json_pointer& ptr) const
+    {
+        return ptr.get_checked(this);
+    }
+
+    /*!
+    @brief return flattened JSON value
+
+    The function creates a JSON object whose keys are JSON pointers (see [RFC
+    6901](https://tools.ietf.org/html/rfc6901)) and whose values are all
+    primitive. The original JSON value can be restored using the @ref
+    unflatten() function.
+
+    @return an object that maps JSON pointers to primitive values
+
+    @note Empty objects and arrays are flattened to `null` and will not be
+          reconstructed correctly by the @ref unflatten() function.
+
+    @complexity Linear in the size the JSON value.
+
+    @liveexample{The following code shows how a JSON object is flattened to an
+    object whose keys consist of JSON pointers.,flatten}
+
+    @sa see @ref unflatten() for the reverse function
+
+    @since version 2.0.0
+    */
+    basic_json flatten() const
+    {
+        basic_json result(value_t::object);
+        json_pointer::flatten("", *this, result);
+        return result;
+    }
+
+    /*!
+    @brief unflatten a previously flattened JSON value
+
+    The function restores the arbitrary nesting of a JSON value that has been
+    flattened before using the @ref flatten() function. The JSON value must
+    meet certain constraints:
+    1. The value must be an object.
+    2. The keys must be JSON pointers (see
+       [RFC 6901](https://tools.ietf.org/html/rfc6901))
+    3. The mapped values must be primitive JSON types.
+
+    @return the original JSON from a flattened version
+
+    @note Empty objects and arrays are flattened by @ref flatten() to `null`
+          values and can not unflattened to their original type. Apart from
+          this example, for a JSON value `j`, the following is always true:
+          `j == j.flatten().unflatten()`.
+
+    @complexity Linear in the size the JSON value.
+
+    @throw type_error.314  if value is not an object
+    @throw type_error.315  if object values are not primitive
+
+    @liveexample{The following code shows how a flattened JSON object is
+    unflattened into the original nested JSON object.,unflatten}
+
+    @sa see @ref flatten() for the reverse function
+
+    @since version 2.0.0
+    */
+    basic_json unflatten() const
+    {
+        return json_pointer::unflatten(*this);
+    }
+
+    /// @}
+
+    //////////////////////////
+    // JSON Patch functions //
+    //////////////////////////
+
+    /// @name JSON Patch functions
+    /// @{
+
+    /*!
+    @brief applies a JSON patch
+
+    [JSON Patch](http://jsonpatch.com) defines a JSON document structure for
+    expressing a sequence of operations to apply to a JSON) document. With
+    this function, a JSON Patch is applied to the current JSON value by
+    executing all operations from the patch.
+
+    @param[in] json_patch  JSON patch document
+    @return patched document
+
+    @note The application of a patch is atomic: Either all operations succeed
+          and the patched document is returned or an exception is thrown. In
+          any case, the original value is not changed: the patch is applied
+          to a copy of the value.
+
+    @throw parse_error.104 if the JSON patch does not consist of an array of
+    objects
+
+    @throw parse_error.105 if the JSON patch is malformed (e.g., mandatory
+    attributes are missing); example: `"operation add must have member path"`
+
+    @throw out_of_range.401 if an array index is out of range.
+
+    @throw out_of_range.403 if a JSON pointer inside the patch could not be
+    resolved successfully in the current JSON value; example: `"key baz not
+    found"`
+
+    @throw out_of_range.405 if JSON pointer has no parent ("add", "remove",
+    "move")
+
+    @throw other_error.501 if "test" operation was unsuccessful
+
+    @complexity Linear in the size of the JSON value and the length of the
+    JSON patch. As usually only a fraction of the JSON value is affected by
+    the patch, the complexity can usually be neglected.
+
+    @liveexample{The following code shows how a JSON patch is applied to a
+    value.,patch}
+
+    @sa see @ref diff -- create a JSON patch by comparing two JSON values
+
+    @sa [RFC 6902 (JSON Patch)](https://tools.ietf.org/html/rfc6902)
+    @sa [RFC 6901 (JSON Pointer)](https://tools.ietf.org/html/rfc6901)
+
+    @since version 2.0.0
+    */
+    basic_json patch(const basic_json& json_patch) const
+    {
+        // make a working copy to apply the patch to
+        basic_json result = *this;
+
+        // the valid JSON Patch operations
+        enum class patch_operations {add, remove, replace, move, copy, test, invalid};
+
+        const auto get_op = [](const std::string & op)
+        {
+            if (op == "add")
+            {
+                return patch_operations::add;
+            }
+            if (op == "remove")
+            {
+                return patch_operations::remove;
+            }
+            if (op == "replace")
+            {
+                return patch_operations::replace;
+            }
+            if (op == "move")
+            {
+                return patch_operations::move;
+            }
+            if (op == "copy")
+            {
+                return patch_operations::copy;
+            }
+            if (op == "test")
+            {
+                return patch_operations::test;
+            }
+
+            return patch_operations::invalid;
+        };
+
+        // wrapper for "add" operation; add value at ptr
+        const auto operation_add = [&result](json_pointer & ptr, basic_json val)
+        {
+            // adding to the root of the target document means replacing it
+            if (ptr.empty())
+            {
+                result = val;
+                return;
+            }
+
+            // make sure the top element of the pointer exists
+            json_pointer top_pointer = ptr.top();
+            if (top_pointer != ptr)
+            {
+                result.at(top_pointer);
+            }
+
+            // get reference to parent of JSON pointer ptr
+            const auto last_path = ptr.back();
+            ptr.pop_back();
+            basic_json& parent = result[ptr];
+
+            switch (parent.m_type)
+            {
+                case value_t::null:
+                case value_t::object:
+                {
+                    // use operator[] to add value
+                    parent[last_path] = val;
+                    break;
+                }
+
+                case value_t::array:
+                {
+                    if (last_path == "-")
+                    {
+                        // special case: append to back
+                        parent.push_back(val);
+                    }
+                    else
+                    {
+                        const auto idx = json_pointer::array_index(last_path);
+                        if (JSON_HEDLEY_UNLIKELY(idx > parent.size()))
+                        {
+                            // avoid undefined behavior
+                            JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range", parent));
+                        }
+
+                        // default case: insert add offset
+                        parent.insert(parent.begin() + static_cast<difference_type>(idx), val);
+                    }
+                    break;
+                }
+
+                // if there exists a parent it cannot be primitive
+                case value_t::string: // LCOV_EXCL_LINE
+                case value_t::boolean: // LCOV_EXCL_LINE
+                case value_t::number_integer: // LCOV_EXCL_LINE
+                case value_t::number_unsigned: // LCOV_EXCL_LINE
+                case value_t::number_float: // LCOV_EXCL_LINE
+                case value_t::binary: // LCOV_EXCL_LINE
+                case value_t::discarded: // LCOV_EXCL_LINE
+                default:            // LCOV_EXCL_LINE
+                    JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
+            }
+        };
+
+        // wrapper for "remove" operation; remove value at ptr
+        const auto operation_remove = [this, &result](json_pointer & ptr)
+        {
+            // get reference to parent of JSON pointer ptr
+            const auto last_path = ptr.back();
+            ptr.pop_back();
+            basic_json& parent = result.at(ptr);
+
+            // remove child
+            if (parent.is_object())
+            {
+                // perform range check
+                auto it = parent.find(last_path);
+                if (JSON_HEDLEY_LIKELY(it != parent.end()))
+                {
+                    parent.erase(it);
+                }
+                else
+                {
+                    JSON_THROW(out_of_range::create(403, "key '" + last_path + "' not found", *this));
+                }
+            }
+            else if (parent.is_array())
+            {
+                // note erase performs range check
+                parent.erase(json_pointer::array_index(last_path));
+            }
+        };
+
+        // type check: top level value must be an array
+        if (JSON_HEDLEY_UNLIKELY(!json_patch.is_array()))
+        {
+            JSON_THROW(parse_error::create(104, 0, "JSON patch must be an array of objects", json_patch));
+        }
+
+        // iterate and apply the operations
+        for (const auto& val : json_patch)
+        {
+            // wrapper to get a value for an operation
+            const auto get_value = [&val](const std::string & op,
+                                          const std::string & member,
+                                          bool string_type) -> basic_json &
+            {
+                // find value
+                auto it = val.m_value.object->find(member);
+
+                // context-sensitive error message
+                const auto error_msg = (op == "op") ? "operation" : "operation '" + op + "'";
+
+                // check if desired value is present
+                if (JSON_HEDLEY_UNLIKELY(it == val.m_value.object->end()))
+                {
+                    // NOLINTNEXTLINE(performance-inefficient-string-concatenation)
+                    JSON_THROW(parse_error::create(105, 0, error_msg + " must have member '" + member + "'", val));
+                }
+
+                // check if result is of type string
+                if (JSON_HEDLEY_UNLIKELY(string_type && !it->second.is_string()))
+                {
+                    // NOLINTNEXTLINE(performance-inefficient-string-concatenation)
+                    JSON_THROW(parse_error::create(105, 0, error_msg + " must have string member '" + member + "'", val));
+                }
+
+                // no error: return value
+                return it->second;
+            };
+
+            // type check: every element of the array must be an object
+            if (JSON_HEDLEY_UNLIKELY(!val.is_object()))
+            {
+                JSON_THROW(parse_error::create(104, 0, "JSON patch must be an array of objects", val));
+            }
+
+            // collect mandatory members
+            const auto op = get_value("op", "op", true).template get<std::string>();
+            const auto path = get_value(op, "path", true).template get<std::string>();
+            json_pointer ptr(path);
+
+            switch (get_op(op))
+            {
+                case patch_operations::add:
+                {
+                    operation_add(ptr, get_value("add", "value", false));
+                    break;
+                }
+
+                case patch_operations::remove:
+                {
+                    operation_remove(ptr);
+                    break;
+                }
+
+                case patch_operations::replace:
+                {
+                    // the "path" location must exist - use at()
+                    result.at(ptr) = get_value("replace", "value", false);
+                    break;
+                }
+
+                case patch_operations::move:
+                {
+                    const auto from_path = get_value("move", "from", true).template get<std::string>();
+                    json_pointer from_ptr(from_path);
+
+                    // the "from" location must exist - use at()
+                    basic_json v = result.at(from_ptr);
+
+                    // The move operation is functionally identical to a
+                    // "remove" operation on the "from" location, followed
+                    // immediately by an "add" operation at the target
+                    // location with the value that was just removed.
+                    operation_remove(from_ptr);
+                    operation_add(ptr, v);
+                    break;
+                }
+
+                case patch_operations::copy:
+                {
+                    const auto from_path = get_value("copy", "from", true).template get<std::string>();
+                    const json_pointer from_ptr(from_path);
+
+                    // the "from" location must exist - use at()
+                    basic_json v = result.at(from_ptr);
+
+                    // The copy is functionally identical to an "add"
+                    // operation at the target location using the value
+                    // specified in the "from" member.
+                    operation_add(ptr, v);
+                    break;
+                }
+
+                case patch_operations::test:
+                {
+                    bool success = false;
+                    JSON_TRY
+                    {
+                        // check if "value" matches the one at "path"
+                        // the "path" location must exist - use at()
+                        success = (result.at(ptr) == get_value("test", "value", false));
+                    }
+                    JSON_INTERNAL_CATCH (out_of_range&)
+                    {
+                        // ignore out of range errors: success remains false
+                    }
+
+                    // throw an exception if test fails
+                    if (JSON_HEDLEY_UNLIKELY(!success))
+                    {
+                        JSON_THROW(other_error::create(501, "unsuccessful: " + val.dump(), val));
+                    }
+
+                    break;
+                }
+
+                case patch_operations::invalid:
+                default:
+                {
+                    // op must be "add", "remove", "replace", "move", "copy", or
+                    // "test"
+                    JSON_THROW(parse_error::create(105, 0, "operation value '" + op + "' is invalid", val));
+                }
+            }
+        }
+
+        return result;
+    }
+
+    /*!
+    @brief creates a diff as a JSON patch
+
+    Creates a [JSON Patch](http://jsonpatch.com) so that value @a source can
+    be changed into the value @a target by calling @ref patch function.
+
+    @invariant For two JSON values @a source and @a target, the following code
+    yields always `true`:
+    @code {.cpp}
+    source.patch(diff(source, target)) == target;
+    @endcode
+
+    @note Currently, only `remove`, `add`, and `replace` operations are
+          generated.
+
+    @param[in] source  JSON value to compare from
+    @param[in] target  JSON value to compare against
+    @param[in] path    helper value to create JSON pointers
+
+    @return a JSON patch to convert the @a source to @a target
+
+    @complexity Linear in the lengths of @a source and @a target.
+
+    @liveexample{The following code shows how a JSON patch is created as a
+    diff for two JSON values.,diff}
+
+    @sa see @ref patch -- apply a JSON patch
+    @sa see @ref merge_patch -- apply a JSON Merge Patch
+
+    @sa [RFC 6902 (JSON Patch)](https://tools.ietf.org/html/rfc6902)
+
+    @since version 2.0.0
+    */
+    JSON_HEDLEY_WARN_UNUSED_RESULT
+    static basic_json diff(const basic_json& source, const basic_json& target,
+                           const std::string& path = "")
+    {
+        // the patch
+        basic_json result(value_t::array);
+
+        // if the values are the same, return empty patch
+        if (source == target)
+        {
+            return result;
+        }
+
+        if (source.type() != target.type())
+        {
+            // different types: replace value
+            result.push_back(
+            {
+                {"op", "replace"}, {"path", path}, {"value", target}
+            });
+            return result;
+        }
+
+        switch (source.type())
+        {
+            case value_t::array:
+            {
+                // first pass: traverse common elements
+                std::size_t i = 0;
+                while (i < source.size() && i < target.size())
+                {
+                    // recursive call to compare array values at index i
+                    auto temp_diff = diff(source[i], target[i], path + "/" + std::to_string(i));
+                    result.insert(result.end(), temp_diff.begin(), temp_diff.end());
+                    ++i;
+                }
+
+                // i now reached the end of at least one array
+                // in a second pass, traverse the remaining elements
+
+                // remove my remaining elements
+                const auto end_index = static_cast<difference_type>(result.size());
+                while (i < source.size())
+                {
+                    // add operations in reverse order to avoid invalid
+                    // indices
+                    result.insert(result.begin() + end_index, object(
+                    {
+                        {"op", "remove"},
+                        {"path", path + "/" + std::to_string(i)}
+                    }));
+                    ++i;
+                }
+
+                // add other remaining elements
+                while (i < target.size())
+                {
+                    result.push_back(
+                    {
+                        {"op", "add"},
+                        {"path", path + "/-"},
+                        {"value", target[i]}
+                    });
+                    ++i;
+                }
+
+                break;
+            }
+
+            case value_t::object:
+            {
+                // first pass: traverse this object's elements
+                for (auto it = source.cbegin(); it != source.cend(); ++it)
+                {
+                    // escape the key name to be used in a JSON patch
+                    const auto path_key = path + "/" + detail::escape(it.key());
+
+                    if (target.find(it.key()) != target.end())
+                    {
+                        // recursive call to compare object values at key it
+                        auto temp_diff = diff(it.value(), target[it.key()], path_key);
+                        result.insert(result.end(), temp_diff.begin(), temp_diff.end());
+                    }
+                    else
+                    {
+                        // found a key that is not in o -> remove it
+                        result.push_back(object(
+                        {
+                            {"op", "remove"}, {"path", path_key}
+                        }));
+                    }
+                }
+
+                // second pass: traverse other object's elements
+                for (auto it = target.cbegin(); it != target.cend(); ++it)
+                {
+                    if (source.find(it.key()) == source.end())
+                    {
+                        // found a key that is not in this -> add it
+                        const auto path_key = path + "/" + detail::escape(it.key());
+                        result.push_back(
+                        {
+                            {"op", "add"}, {"path", path_key},
+                            {"value", it.value()}
+                        });
+                    }
+                }
+
+                break;
+            }
+
+            case value_t::null:
+            case value_t::string:
+            case value_t::boolean:
+            case value_t::number_integer:
+            case value_t::number_unsigned:
+            case value_t::number_float:
+            case value_t::binary:
+            case value_t::discarded:
+            default:
+            {
+                // both primitive type: replace value
+                result.push_back(
+                {
+                    {"op", "replace"}, {"path", path}, {"value", target}
+                });
+                break;
+            }
+        }
+
+        return result;
+    }
+
+    /// @}
+
+    ////////////////////////////////
+    // JSON Merge Patch functions //
+    ////////////////////////////////
+
+    /// @name JSON Merge Patch functions
+    /// @{
+
+    /*!
+    @brief applies a JSON Merge Patch
+
+    The merge patch format is primarily intended for use with the HTTP PATCH
+    method as a means of describing a set of modifications to a target
+    resource's content. This function applies a merge patch to the current
+    JSON value.
+
+    The function implements the following algorithm from Section 2 of
+    [RFC 7396 (JSON Merge Patch)](https://tools.ietf.org/html/rfc7396):
+
+    ```
+    define MergePatch(Target, Patch):
+      if Patch is an Object:
+        if Target is not an Object:
+          Target = {} // Ignore the contents and set it to an empty Object
+        for each Name/Value pair in Patch:
+          if Value is null:
+            if Name exists in Target:
+              remove the Name/Value pair from Target
+          else:
+            Target[Name] = MergePatch(Target[Name], Value)
+        return Target
+      else:
+        return Patch
+    ```
+
+    Thereby, `Target` is the current object; that is, the patch is applied to
+    the current value.
+
+    @param[in] apply_patch  the patch to apply
+
+    @complexity Linear in the lengths of @a patch.
+
+    @liveexample{The following code shows how a JSON Merge Patch is applied to
+    a JSON document.,merge_patch}
+
+    @sa see @ref patch -- apply a JSON patch
+    @sa [RFC 7396 (JSON Merge Patch)](https://tools.ietf.org/html/rfc7396)
+
+    @since version 3.0.0
+    */
+    void merge_patch(const basic_json& apply_patch)
+    {
+        if (apply_patch.is_object())
+        {
+            if (!is_object())
+            {
+                *this = object();
+            }
+            for (auto it = apply_patch.begin(); it != apply_patch.end(); ++it)
+            {
+                if (it.value().is_null())
+                {
+                    erase(it.key());
+                }
+                else
+                {
+                    operator[](it.key()).merge_patch(it.value());
+                }
+            }
+        }
+        else
+        {
+            *this = apply_patch;
+        }
+    }
+
+    /// @}
+};
+
+/*!
+@brief user-defined to_string function for JSON values
+
+This function implements a user-defined to_string  for JSON objects.
+
+@param[in] j  a JSON object
+@return a std::string object
+*/
+
+NLOHMANN_BASIC_JSON_TPL_DECLARATION
+std::string to_string(const NLOHMANN_BASIC_JSON_TPL& j)
+{
+    return j.dump();
+}
+} // namespace nlohmann
+
+///////////////////////
+// nonmember support //
+///////////////////////
+
+// specialization of std::swap, and std::hash
+namespace std
+{
+
+/// hash value for JSON objects
+template<>
+struct hash<nlohmann::json>
+{
+    /*!
+    @brief return a hash value for a JSON object
+
+    @since version 1.0.0
+    */
+    std::size_t operator()(const nlohmann::json& j) const
+    {
+        return nlohmann::detail::hash(j);
+    }
+};
+
+/// specialization for std::less<value_t>
+/// @note: do not remove the space after '<',
+///        see https://github.com/nlohmann/json/pull/679
+template<>
+struct less<::nlohmann::detail::value_t>
+{
+    /*!
+    @brief compare two value_t enum values
+    @since version 3.0.0
+    */
+    bool operator()(nlohmann::detail::value_t lhs,
+                    nlohmann::detail::value_t rhs) const noexcept
+    {
+        return nlohmann::detail::operator<(lhs, rhs);
+    }
+};
+
+// C++20 prohibit function specialization in the std namespace.
+#ifndef JSON_HAS_CPP_20
+
+/*!
+@brief exchanges the values of two JSON objects
+
+@since version 1.0.0
+*/
+template<>
+inline void swap<nlohmann::json>(nlohmann::json& j1, nlohmann::json& j2) noexcept( // NOLINT(readability-inconsistent-declaration-parameter-name)
+    is_nothrow_move_constructible<nlohmann::json>::value&&  // NOLINT(misc-redundant-expression)
+    is_nothrow_move_assignable<nlohmann::json>::value
+                              )
+{
+    j1.swap(j2);
+}
+
+#endif
+
+} // namespace std
+
+/*!
+@brief user-defined string literal for JSON values
+
+This operator implements a user-defined string literal for JSON objects. It
+can be used by adding `"_json"` to a string literal and returns a JSON object
+if no parse error occurred.
+
+@param[in] s  a string representation of a JSON object
+@param[in] n  the length of string @a s
+@return a JSON object
+
+@since version 1.0.0
+*/
+JSON_HEDLEY_NON_NULL(1)
+inline nlohmann::json operator "" _json(const char* s, std::size_t n)
+{
+    return nlohmann::json::parse(s, s + n);
+}
+
+/*!
+@brief user-defined string literal for JSON pointer
+
+This operator implements a user-defined string literal for JSON Pointers. It
+can be used by adding `"_json_pointer"` to a string literal and returns a JSON pointer
+object if no parse error occurred.
+
+@param[in] s  a string representation of a JSON Pointer
+@param[in] n  the length of string @a s
+@return a JSON pointer object
+
+@since version 2.0.0
+*/
+JSON_HEDLEY_NON_NULL(1)
+inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std::size_t n)
+{
+    return nlohmann::json::json_pointer(std::string(s, n));
+}
+
+// #include <nlohmann/detail/macro_unscope.hpp>
+
+
+// restore clang diagnostic settings
+#if defined(__clang__)
+    #pragma clang diagnostic pop
+#endif
+
+// clean up
+#undef JSON_ASSERT
+#undef JSON_INTERNAL_CATCH
+#undef JSON_CATCH
+#undef JSON_THROW
+#undef JSON_TRY
+#undef JSON_PRIVATE_UNLESS_TESTED
+#undef JSON_HAS_CPP_11
+#undef JSON_HAS_CPP_14
+#undef JSON_HAS_CPP_17
+#undef JSON_HAS_CPP_20
+#undef NLOHMANN_BASIC_JSON_TPL_DECLARATION
+#undef NLOHMANN_BASIC_JSON_TPL
+#undef JSON_EXPLICIT
+#undef NLOHMANN_CAN_CALL_STD_FUNC_IMPL
+
+// #include <nlohmann/thirdparty/hedley/hedley_undef.hpp>
+
+
+#undef JSON_HEDLEY_ALWAYS_INLINE
+#undef JSON_HEDLEY_ARM_VERSION
+#undef JSON_HEDLEY_ARM_VERSION_CHECK
+#undef JSON_HEDLEY_ARRAY_PARAM
+#undef JSON_HEDLEY_ASSUME
+#undef JSON_HEDLEY_BEGIN_C_DECLS
+#undef JSON_HEDLEY_CLANG_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_CLANG_HAS_BUILTIN
+#undef JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_CLANG_HAS_DECLSPEC_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_CLANG_HAS_EXTENSION
+#undef JSON_HEDLEY_CLANG_HAS_FEATURE
+#undef JSON_HEDLEY_CLANG_HAS_WARNING
+#undef JSON_HEDLEY_COMPCERT_VERSION
+#undef JSON_HEDLEY_COMPCERT_VERSION_CHECK
+#undef JSON_HEDLEY_CONCAT
+#undef JSON_HEDLEY_CONCAT3
+#undef JSON_HEDLEY_CONCAT3_EX
+#undef JSON_HEDLEY_CONCAT_EX
+#undef JSON_HEDLEY_CONST
+#undef JSON_HEDLEY_CONSTEXPR
+#undef JSON_HEDLEY_CONST_CAST
+#undef JSON_HEDLEY_CPP_CAST
+#undef JSON_HEDLEY_CRAY_VERSION
+#undef JSON_HEDLEY_CRAY_VERSION_CHECK
+#undef JSON_HEDLEY_C_DECL
+#undef JSON_HEDLEY_DEPRECATED
+#undef JSON_HEDLEY_DEPRECATED_FOR
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNUSED_FUNCTION
+#undef JSON_HEDLEY_DIAGNOSTIC_POP
+#undef JSON_HEDLEY_DIAGNOSTIC_PUSH
+#undef JSON_HEDLEY_DMC_VERSION
+#undef JSON_HEDLEY_DMC_VERSION_CHECK
+#undef JSON_HEDLEY_EMPTY_BASES
+#undef JSON_HEDLEY_EMSCRIPTEN_VERSION
+#undef JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK
+#undef JSON_HEDLEY_END_C_DECLS
+#undef JSON_HEDLEY_FLAGS
+#undef JSON_HEDLEY_FLAGS_CAST
+#undef JSON_HEDLEY_GCC_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_GCC_HAS_BUILTIN
+#undef JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_GCC_HAS_EXTENSION
+#undef JSON_HEDLEY_GCC_HAS_FEATURE
+#undef JSON_HEDLEY_GCC_HAS_WARNING
+#undef JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK
+#undef JSON_HEDLEY_GCC_VERSION
+#undef JSON_HEDLEY_GCC_VERSION_CHECK
+#undef JSON_HEDLEY_GNUC_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_GNUC_HAS_BUILTIN
+#undef JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_GNUC_HAS_EXTENSION
+#undef JSON_HEDLEY_GNUC_HAS_FEATURE
+#undef JSON_HEDLEY_GNUC_HAS_WARNING
+#undef JSON_HEDLEY_GNUC_VERSION
+#undef JSON_HEDLEY_GNUC_VERSION_CHECK
+#undef JSON_HEDLEY_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_HAS_BUILTIN
+#undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS
+#undef JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_HAS_EXTENSION
+#undef JSON_HEDLEY_HAS_FEATURE
+#undef JSON_HEDLEY_HAS_WARNING
+#undef JSON_HEDLEY_IAR_VERSION
+#undef JSON_HEDLEY_IAR_VERSION_CHECK
+#undef JSON_HEDLEY_IBM_VERSION
+#undef JSON_HEDLEY_IBM_VERSION_CHECK
+#undef JSON_HEDLEY_IMPORT
+#undef JSON_HEDLEY_INLINE
+#undef JSON_HEDLEY_INTEL_CL_VERSION
+#undef JSON_HEDLEY_INTEL_CL_VERSION_CHECK
+#undef JSON_HEDLEY_INTEL_VERSION
+#undef JSON_HEDLEY_INTEL_VERSION_CHECK
+#undef JSON_HEDLEY_IS_CONSTANT
+#undef JSON_HEDLEY_IS_CONSTEXPR_
+#undef JSON_HEDLEY_LIKELY
+#undef JSON_HEDLEY_MALLOC
+#undef JSON_HEDLEY_MCST_LCC_VERSION
+#undef JSON_HEDLEY_MCST_LCC_VERSION_CHECK
+#undef JSON_HEDLEY_MESSAGE
+#undef JSON_HEDLEY_MSVC_VERSION
+#undef JSON_HEDLEY_MSVC_VERSION_CHECK
+#undef JSON_HEDLEY_NEVER_INLINE
+#undef JSON_HEDLEY_NON_NULL
+#undef JSON_HEDLEY_NO_ESCAPE
+#undef JSON_HEDLEY_NO_RETURN
+#undef JSON_HEDLEY_NO_THROW
+#undef JSON_HEDLEY_NULL
+#undef JSON_HEDLEY_PELLES_VERSION
+#undef JSON_HEDLEY_PELLES_VERSION_CHECK
+#undef JSON_HEDLEY_PGI_VERSION
+#undef JSON_HEDLEY_PGI_VERSION_CHECK
+#undef JSON_HEDLEY_PREDICT
+#undef JSON_HEDLEY_PRINTF_FORMAT
+#undef JSON_HEDLEY_PRIVATE
+#undef JSON_HEDLEY_PUBLIC
+#undef JSON_HEDLEY_PURE
+#undef JSON_HEDLEY_REINTERPRET_CAST
+#undef JSON_HEDLEY_REQUIRE
+#undef JSON_HEDLEY_REQUIRE_CONSTEXPR
+#undef JSON_HEDLEY_REQUIRE_MSG
+#undef JSON_HEDLEY_RESTRICT
+#undef JSON_HEDLEY_RETURNS_NON_NULL
+#undef JSON_HEDLEY_SENTINEL
+#undef JSON_HEDLEY_STATIC_ASSERT
+#undef JSON_HEDLEY_STATIC_CAST
+#undef JSON_HEDLEY_STRINGIFY
+#undef JSON_HEDLEY_STRINGIFY_EX
+#undef JSON_HEDLEY_SUNPRO_VERSION
+#undef JSON_HEDLEY_SUNPRO_VERSION_CHECK
+#undef JSON_HEDLEY_TINYC_VERSION
+#undef JSON_HEDLEY_TINYC_VERSION_CHECK
+#undef JSON_HEDLEY_TI_ARMCL_VERSION
+#undef JSON_HEDLEY_TI_ARMCL_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL2000_VERSION
+#undef JSON_HEDLEY_TI_CL2000_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL430_VERSION
+#undef JSON_HEDLEY_TI_CL430_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL6X_VERSION
+#undef JSON_HEDLEY_TI_CL6X_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL7X_VERSION
+#undef JSON_HEDLEY_TI_CL7X_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CLPRU_VERSION
+#undef JSON_HEDLEY_TI_CLPRU_VERSION_CHECK
+#undef JSON_HEDLEY_TI_VERSION
+#undef JSON_HEDLEY_TI_VERSION_CHECK
+#undef JSON_HEDLEY_UNAVAILABLE
+#undef JSON_HEDLEY_UNLIKELY
+#undef JSON_HEDLEY_UNPREDICTABLE
+#undef JSON_HEDLEY_UNREACHABLE
+#undef JSON_HEDLEY_UNREACHABLE_RETURN
+#undef JSON_HEDLEY_VERSION
+#undef JSON_HEDLEY_VERSION_DECODE_MAJOR
+#undef JSON_HEDLEY_VERSION_DECODE_MINOR
+#undef JSON_HEDLEY_VERSION_DECODE_REVISION
+#undef JSON_HEDLEY_VERSION_ENCODE
+#undef JSON_HEDLEY_WARNING
+#undef JSON_HEDLEY_WARN_UNUSED_RESULT
+#undef JSON_HEDLEY_WARN_UNUSED_RESULT_MSG
+#undef JSON_HEDLEY_FALL_THROUGH
+
+
+
+#endif  // INCLUDE_NLOHMANN_JSON_HPP_
\ No newline at end of file
diff --git a/src/viewer3d/gltf/stb_image.h b/src/viewer3d/gltf/stb_image.h
new file mode 100644
index 00000000..e9278075
--- /dev/null
+++ b/src/viewer3d/gltf/stb_image.h
@@ -0,0 +1,8653 @@
+/* stb_image - v2.21 - public domain image loader - http://nothings.org/stb
+                                  no warranty implied; use at your own risk
+
+   Do this:
+      #define STB_IMAGE_IMPLEMENTATION
+   before you include this file in *one* C or C++ file to create the
+implementation.
+
+   // i.e. it should look like this:
+   #include ...
+   #include ...
+   #include ...
+   #define STB_IMAGE_IMPLEMENTATION
+   #include "stb_image.h"
+
+   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
+   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using
+malloc,realloc,free
+
+
+   QUICK NOTES:
+      Primarily of interest to game developers and other people who can
+          avoid problematic images and only need the trivial interface
+
+      JPEG baseline & progressive (12 bpc/arithmetic not supported, same as
+stock IJG lib) PNG 1/2/4/8/16-bit-per-channel
+
+      TGA (not sure what subset, if a subset)
+      BMP non-1bpp, non-RLE
+      PSD (composited view only, no extra channels, 8/16 bit-per-channel)
+
+      GIF (*comp always reports as 4-channel)
+      HDR (radiance rgbE format)
+      PIC (Softimage PIC)
+      PNM (PPM and PGM binary only)
+
+      Animated GIF still needs a proper API, but here's one way to do it:
+          http://gist.github.com/urraka/685d9a6340b26b830d49
+
+      - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
+      - decode from arbitrary I/O callbacks
+      - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
+
+   Full documentation under "DOCUMENTATION" below.
+
+
+LICENSE
+
+  See end of file for license information.
+
+RECENT REVISION HISTORY:
+
+      2.21  (2019-02-25) fix typo in comment
+      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and
+platform ifdefs 2.19  (2018-02-11) fix warning 2.18  (2018-01-30) fix warnings
+      2.17  (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
+      2.16  (2017-07-23) all functions have 16-bit variants; optimizations;
+bugfixes 2.15  (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE
+detection on GCC 2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for
+Imagenet JPGs 2.13  (2016-12-04) experimental 16-bit API, only for PNG so far;
+fixes 2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes 2.11
+(2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 RGB-format JPEG; remove
+white matting in PSD; allocate large structures on the stack; correct channel
+count for PNG & BMP 2.10  (2016-01-22) avoid warning introduced in 2.09 2.09
+(2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
+
+   See end of file for full revision history.
+
+
+ ============================    Contributors    =========================
+
+ Image formats                          Extensions, features
+    Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
+    Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
+    Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
+    Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
+    Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
+    Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
+    Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
+    github:urraka (animated gif)           Junggon Kim (PNM comments)
+    Christopher Forseth (animated gif)     Daniel Gibson (16-bit TGA)
+                                           socks-the-fox (16-bit PNG)
+                                           Jeremy Sawicki (handle all ImageNet
+JPGs) Optimizations & bugfixes                  Mikhail Morozov (1-bit BMP)
+    Fabian "ryg" Giesen                    Anael Seghezzi (is-16-bit query)
+    Arseny Kapoulkine
+    John-Mark Allen
+    Carmelo J Fdez-Aguera
+
+ Bug & warning fixes
+    Marc LeBlanc            David Woo          Guillaume George   Martins
+Mozeiko Christpher Lloyd        Jerry Jansson      Joseph Thomson     Phil
+Jordan Dave Moore              Roy Eltham         Hayaki Saito       Nathan Reed
+    Won Chun                Luke Graham        Johan Duparc       Nick Verigakis
+    the Horde3D community   Thomas Ruf         Ronny Chevalier    github:rlyeh
+    Janez Zemva             John Bartholomew   Michal Cichon github:romigrou
+    Jonathan Blow           Ken Hamada         Tero Hanninen      github:svdijk
+    Laurent Gomila          Cort Stratton      Sergio Gonzalez    github:snagar
+    Aruelien Pocheville     Thibault Reuille   Cass Everitt       github:Zelex
+    Ryamond Barbiero        Paul Du Bois       Engin Manap        github:grim210
+    Aldo Culquicondor       Philipp Wiesemann  Dale Weiler        github:sammyhw
+    Oriol Ferrer Mesia      Josh Tobin         Matthew Gregan     github:phprus
+    Julian Raschke          Gregory Mullen     Baldur Karlsson
+github:poppolopoppo Christian Floisand      Kevin Schmidt      JR Smith
+github:darealshinji Blazej Dariusz Roszkowski github:Michaelangel007
+*/
+
+#ifndef STBI_INCLUDE_STB_IMAGE_H
+#define STBI_INCLUDE_STB_IMAGE_H
+
+// DOCUMENTATION
+//
+// Limitations:
+//    - no 12-bit-per-channel JPEG
+//    - no JPEGs with arithmetic coding
+//    - GIF always returns *comp=4
+//
+// Basic usage (see HDR discussion below for HDR usage):
+//    int x,y,n;
+//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
+//    // ... process data if not NULL ...
+//    // ... x = width, y = height, n = # 8-bit components per pixel ...
+//    // ... replace '0' with '1'..'4' to force that many components per pixel
+//    // ... but 'n' will always be the number that it would have been if you
+//    said 0 stbi_image_free(data)
+//
+// Standard parameters:
+//    int *x                 -- outputs image width in pixels
+//    int *y                 -- outputs image height in pixels
+//    int *channels_in_file  -- outputs # of image components in image file
+//    int desired_channels   -- if non-zero, # of image components requested in
+//    result
+//
+// The return value from an image loader is an 'unsigned char *' which points
+// to the pixel data, or NULL on an allocation failure or if the image is
+// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
+// with each pixel consisting of N interleaved 8-bit components; the first
+// pixel pointed to is top-left-most in the image. There is no padding between
+// image scanlines or between pixels, regardless of format. The number of
+// components N is 'desired_channels' if desired_channels is non-zero, or
+// *channels_in_file otherwise. If desired_channels is non-zero,
+// *channels_in_file has the number of components that _would_ have been
+// output otherwise. E.g. if you set desired_channels to 4, you will always
+// get RGBA output, but you can check *channels_in_file to see if it's trivially
+// opaque because e.g. there were only 3 channels in the source image.
+//
+// An output image with N components has the following components interleaved
+// in this order in each pixel:
+//
+//     N=#comp     components
+//       1           grey
+//       2           grey, alpha
+//       3           red, green, blue
+//       4           red, green, blue, alpha
+//
+// If image loading fails for any reason, the return value will be NULL,
+// and *x, *y, *channels_in_file will be unchanged. The function
+// stbi_failure_reason() can be queried for an extremely brief, end-user
+// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
+// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get
+// slightly more user-friendly ones.
+//
+// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
+//
+// ===========================================================================
+//
+// UNICODE:
+//
+//   If compiling for Windows and you wish to use Unicode filenames, compile
+//   with
+//       #define STBI_WINDOWS_UTF8
+//   and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
+//   Windows wchar_t filenames to utf8.
+//
+// ===========================================================================
+//
+// Philosophy
+//
+// stb libraries are designed with the following priorities:
+//
+//    1. easy to use
+//    2. easy to maintain
+//    3. good performance
+//
+// Sometimes I let "good performance" creep up in priority over "easy to
+// maintain", and for best performance I may provide less-easy-to-use APIs that
+// give higher performance, in addition to the easy-to-use ones. Nevertheless,
+// it's important to keep in mind that from the standpoint of you, a client of
+// this library, all you care about is #1 and #3, and stb libraries DO NOT
+// emphasize #3 above all.
+//
+// Some secondary priorities arise directly from the first two, some of which
+// provide more explicit reasons why performance can't be emphasized.
+//
+//    - Portable ("ease of use")
+//    - Small source code footprint ("easy to maintain")
+//    - No dependencies ("ease of use")
+//
+// ===========================================================================
+//
+// I/O callbacks
+//
+// I/O callbacks allow you to read from arbitrary sources, like packaged
+// files or some other source. Data read from callbacks are processed
+// through a small internal buffer (currently 128 bytes) to try to reduce
+// overhead.
+//
+// The three functions you must define are "read" (reads some bytes of data),
+// "skip" (skips some bytes of data), "eof" (reports if the stream is at the
+// end).
+//
+// ===========================================================================
+//
+// SIMD support
+//
+// The JPEG decoder will try to automatically use SIMD kernels on x86 when
+// supported by the compiler. For ARM Neon support, you must explicitly
+// request it.
+//
+// (The old do-it-yourself SIMD API is no longer supported in the current
+// code.)
+//
+// On x86, SSE2 will automatically be used when available based on a run-time
+// test; if not, the generic C versions are used as a fall-back. On ARM targets,
+// the typical path is to have separate builds for NEON and non-NEON devices
+// (at least this is true for iOS and Android). Therefore, the NEON support is
+// toggled by a build flag: define STBI_NEON to get NEON loops.
+//
+// If for some reason you do not want to use any of SIMD code, or if
+// you have issues compiling it, you can disable it entirely by
+// defining STBI_NO_SIMD.
+//
+// ===========================================================================
+//
+// HDR image support   (disable by defining STBI_NO_HDR)
+//
+// stb_image supports loading HDR images in general, and currently the Radiance
+// .HDR file format specifically. You can still load any file through the
+// existing interface; if you attempt to load an HDR file, it will be
+// automatically remapped to LDR, assuming gamma 2.2 and an arbitrary scale
+// factor defaulting to 1; both of these constants can be reconfigured through
+// this interface:
+//
+//     stbi_hdr_to_ldr_gamma(2.2f);
+//     stbi_hdr_to_ldr_scale(1.0f);
+//
+// (note, do not use _inverse_ constants; stbi_image will invert them
+// appropriately).
+//
+// Additionally, there is a new, parallel interface for loading files as
+// (linear) floats to preserve the full dynamic range:
+//
+//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
+//
+// If you load LDR images through this interface, those images will
+// be promoted to floating point values, run through the inverse of
+// constants corresponding to the above:
+//
+//     stbi_ldr_to_hdr_scale(1.0f);
+//     stbi_ldr_to_hdr_gamma(2.2f);
+//
+// Finally, given a filename (or an open file or memory block--see header
+// file for details) containing image data, you can query for the "most
+// appropriate" interface to use (that is, whether the image is HDR or
+// not), using:
+//
+//     stbi_is_hdr(char *filename);
+//
+// ===========================================================================
+//
+// iPhone PNG support:
+//
+// By default we convert iphone-formatted PNGs back to RGB, even though
+// they are internally encoded differently. You can disable this conversion
+// by calling stbi_convert_iphone_png_to_rgb(0), in which case
+// you will always just get the native iphone "format" through (which
+// is BGR stored in RGB).
+//
+// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
+// pixel to remove any premultiplied alpha *only* if the image file explicitly
+// says there's premultiplied data (currently only happens in iPhone images,
+// and only if iPhone convert-to-rgb processing is on).
+//
+// ===========================================================================
+//
+// ADDITIONAL CONFIGURATION
+//
+//  - You can suppress implementation of any of the decoders to reduce
+//    your code footprint by #defining one or more of the following
+//    symbols before creating the implementation.
+//
+//        STBI_NO_JPEG
+//        STBI_NO_PNG
+//        STBI_NO_BMP
+//        STBI_NO_PSD
+//        STBI_NO_TGA
+//        STBI_NO_GIF
+//        STBI_NO_HDR
+//        STBI_NO_PIC
+//        STBI_NO_PNM   (.ppm and .pgm)
+//
+//  - You can request *only* certain decoders and suppress all other ones
+//    (this will be more forward-compatible, as addition of new decoders
+//    doesn't require you to disable them explicitly):
+//
+//        STBI_ONLY_JPEG
+//        STBI_ONLY_PNG
+//        STBI_ONLY_BMP
+//        STBI_ONLY_PSD
+//        STBI_ONLY_TGA
+//        STBI_ONLY_GIF
+//        STBI_ONLY_HDR
+//        STBI_ONLY_PIC
+//        STBI_ONLY_PNM   (.ppm and .pgm)
+//
+//   - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
+//     want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
+//
+
+#ifndef STBI_NO_STDIO
+#include <stdio.h>
+#endif // STBI_NO_STDIO
+
+#define STBI_VERSION 1
+
+enum {
+    STBI_default = 0, // only used for desired_channels
+
+    STBI_grey = 1,
+    STBI_grey_alpha = 2,
+    STBI_rgb = 3,
+    STBI_rgb_alpha = 4
+};
+
+#include <stdlib.h>
+typedef unsigned char stbi_uc;
+typedef unsigned short stbi_us;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef STB_IMAGE_STATIC
+#define STBIDEF static
+#else
+#define STBIDEF extern
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// PRIMARY API - works on images of any type
+//
+
+//
+// load image by filename, open file, or memory buffer
+//
+
+typedef struct {
+    int (*read)(void* user, char* data,
+                int size); // fill 'data' with 'size' bytes.  return number of
+                           // bytes actually read
+    void (*skip)(void* user, int n); // skip the next 'n' bytes, or 'unget' the
+                                     // last -n bytes if negative
+    int (*eof)(void* user); // returns nonzero if we are at end of file/data
+} stbi_io_callbacks;
+
+////////////////////////////////////
+//
+// 8-bits-per-channel interface
+//
+
+STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x,
+                                       int* y, int* channels_in_file,
+                                       int desired_channels);
+STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk,
+                                          void* user, int* x, int* y,
+                                          int* channels_in_file,
+                                          int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y,
+                           int* channels_in_file, int desired_channels);
+STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y,
+                                     int* channels_in_file,
+                                     int desired_channels);
+// for stbi_load_from_file, file pointer is left pointing immediately after
+// image
+#endif
+
+#ifndef STBI_NO_GIF
+STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len,
+                                           int** delays, int* x, int* y, int* z,
+                                           int* comp, int req_comp);
+#endif
+
+#ifdef STBI_WINDOWS_UTF8
+STBIDEF int stbi_convert_wchar_to_utf8(char* buffer, size_t bufferlen,
+                                       const wchar_t* input);
+#endif
+
+////////////////////////////////////
+//
+// 16-bits-per-channel interface
+//
+
+STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len,
+                                          int* x, int* y, int* channels_in_file,
+                                          int desired_channels);
+STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk,
+                                             void* user, int* x, int* y,
+                                             int* channels_in_file,
+                                             int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y,
+                              int* channels_in_file, int desired_channels);
+STBIDEF stbi_us* stbi_load_from_file_16(FILE* f, int* x, int* y,
+                                        int* channels_in_file,
+                                        int desired_channels);
+#endif
+
+////////////////////////////////////
+//
+// float-per-channel interface
+//
+#ifndef STBI_NO_LINEAR
+STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x,
+                                      int* y, int* channels_in_file,
+                                      int desired_channels);
+STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk,
+                                         void* user, int* x, int* y,
+                                         int* channels_in_file,
+                                         int desired_channels);
+
+#ifndef STBI_NO_STDIO
+STBIDEF float* stbi_loadf(char const* filename, int* x, int* y,
+                          int* channels_in_file, int desired_channels);
+STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y,
+                                    int* channels_in_file,
+                                    int desired_channels);
+#endif
+#endif
+
+#ifndef STBI_NO_HDR
+STBIDEF void stbi_hdr_to_ldr_gamma(float gamma);
+STBIDEF void stbi_hdr_to_ldr_scale(float scale);
+#endif // STBI_NO_HDR
+
+#ifndef STBI_NO_LINEAR
+STBIDEF void stbi_ldr_to_hdr_gamma(float gamma);
+STBIDEF void stbi_ldr_to_hdr_scale(float scale);
+#endif // STBI_NO_LINEAR
+
+// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
+STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk,
+                                       void* user);
+STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len);
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_is_hdr(char const* filename);
+STBIDEF int stbi_is_hdr_from_file(FILE* f);
+#endif // STBI_NO_STDIO
+
+// get a VERY brief reason for failure
+// NOT THREADSAFE
+STBIDEF const char* stbi_failure_reason(void);
+
+// free the loaded image -- this is just free()
+STBIDEF void stbi_image_free(void* retval_from_stbi_load);
+
+// get image dimensions & components without fully decoding
+STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x,
+                                  int* y, int* comp);
+STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* clbk, void* user,
+                                     int* x, int* y, int* comp);
+STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len);
+STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* clbk,
+                                          void* user);
+
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp);
+STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp);
+STBIDEF int stbi_is_16_bit(char const* filename);
+STBIDEF int stbi_is_16_bit_from_file(FILE* f);
+#endif
+
+// for image formats that explicitly notate that they have premultiplied alpha,
+// we just return the colors as stored in the file. set this flag to force
+// unpremultiplication. results are undefined if the unpremultiply overflow.
+STBIDEF void
+stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
+
+// indicate whether we should process iphone images back to canonical format,
+// or just pass them through "as-is"
+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
+
+// flip the image vertically, so the first pixel in the output array is the
+// bottom left
+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
+
+// ZLIB client - used by PNG, available for other purposes
+
+STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len,
+                                                int initial_size, int* outlen);
+STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer,
+                                                           int len,
+                                                           int initial_size,
+                                                           int* outlen,
+                                                           int parse_header);
+STBIDEF char* stbi_zlib_decode_malloc(const char* buffer, int len, int* outlen);
+STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen,
+                                    const char* ibuffer, int ilen);
+
+STBIDEF char* stbi_zlib_decode_noheader_malloc(const char* buffer, int len,
+                                               int* outlen);
+STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen,
+                                             const char* ibuffer, int ilen);
+
+#ifdef __cplusplus
+}
+#endif
+
+//
+//
+////   end header file   /////////////////////////////////////////////////////
+#endif // STBI_INCLUDE_STB_IMAGE_H
+
+#ifdef STB_IMAGE_IMPLEMENTATION
+
+#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) ||                       \
+    defined(STBI_ONLY_BMP) || defined(STBI_ONLY_TGA) ||                        \
+    defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) ||                        \
+    defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) ||                        \
+    defined(STBI_ONLY_PNM) || defined(STBI_ONLY_ZLIB)
+#ifndef STBI_ONLY_JPEG
+#define STBI_NO_JPEG
+#endif
+#ifndef STBI_ONLY_PNG
+#define STBI_NO_PNG
+#endif
+#ifndef STBI_ONLY_BMP
+#define STBI_NO_BMP
+#endif
+#ifndef STBI_ONLY_PSD
+#define STBI_NO_PSD
+#endif
+#ifndef STBI_ONLY_TGA
+#define STBI_NO_TGA
+#endif
+#ifndef STBI_ONLY_GIF
+#define STBI_NO_GIF
+#endif
+#ifndef STBI_ONLY_HDR
+#define STBI_NO_HDR
+#endif
+#ifndef STBI_ONLY_PIC
+#define STBI_NO_PIC
+#endif
+#ifndef STBI_ONLY_PNM
+#define STBI_NO_PNM
+#endif
+#endif
+
+#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) &&                     \
+    !defined(STBI_NO_ZLIB)
+#define STBI_NO_ZLIB
+#endif
+
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h> // ptrdiff_t on osx
+#include <stdlib.h>
+#include <string.h>
+
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+#include <math.h> // ldexp, pow
+#endif
+
+#ifndef STBI_NO_STDIO
+#include <stdio.h>
+#endif
+
+#ifndef STBI_ASSERT
+#include <assert.h>
+#define STBI_ASSERT(x) assert(x)
+#endif
+
+#ifdef __cplusplus
+#define STBI_EXTERN extern "C"
+#else
+#define STBI_EXTERN extern
+#endif
+
+#ifndef _MSC_VER
+#ifdef __cplusplus
+#define stbi_inline inline
+#else
+#define stbi_inline
+#endif
+#else
+#define stbi_inline __forceinline
+#endif
+
+#ifdef _MSC_VER
+typedef unsigned short stbi__uint16;
+typedef signed short stbi__int16;
+typedef unsigned int stbi__uint32;
+typedef signed int stbi__int32;
+#else
+#include <stdint.h>
+typedef uint16_t stbi__uint16;
+typedef int16_t stbi__int16;
+typedef uint32_t stbi__uint32;
+typedef int32_t stbi__int32;
+#endif
+
+// should produce compiler error if size is wrong
+typedef unsigned char validate_uint32[sizeof(stbi__uint32) == 4 ? 1 : -1];
+
+#ifdef _MSC_VER
+#define STBI_NOTUSED(v) (void)(v)
+#else
+#define STBI_NOTUSED(v) (void)sizeof(v)
+#endif
+
+#ifdef _MSC_VER
+#define STBI_HAS_LROTL
+#endif
+
+#ifdef STBI_HAS_LROTL
+#define stbi_lrot(x, y) _lrotl(x, y)
+#else
+#define stbi_lrot(x, y) (((x) << (y)) | ((x) >> (32 - (y))))
+#endif
+
+#if defined(STBI_MALLOC) && defined(STBI_FREE) &&                              \
+    (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
+// ok
+#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) &&                          \
+    !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
+// ok
+#else
+#error                                                                         \
+    "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
+#endif
+
+#ifndef STBI_MALLOC
+#define STBI_MALLOC(sz) malloc(sz)
+#define STBI_REALLOC(p, newsz) realloc(p, newsz)
+#define STBI_FREE(p) free(p)
+#endif
+
+#ifndef STBI_REALLOC_SIZED
+#define STBI_REALLOC_SIZED(p, oldsz, newsz) STBI_REALLOC(p, newsz)
+#endif
+
+// x86/x64 detection
+#if defined(__x86_64__) || defined(_M_X64)
+#define STBI__X64_TARGET
+#elif defined(__i386) || defined(_M_IX86)
+#define STBI__X86_TARGET
+#endif
+
+#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) &&    \
+    !defined(STBI_NO_SIMD)
+// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
+// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
+// but previous attempts to provide the SSE2 functions with runtime
+// detection caused numerous issues. The way architecture extensions are
+// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
+// New behavior: if compiled with -msse2, we use SSE2 without any
+// detection; if not, we don't use it at all.
+#define STBI_NO_SIMD
+#endif
+
+#if defined(__MINGW32__) && defined(STBI__X86_TARGET) &&                       \
+    !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
+// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid
+// STBI__X64_TARGET
+//
+// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
+// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
+// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
+// simultaneously enabling "-mstackrealign".
+//
+// See https://github.com/nothings/stb/issues/81 for more information.
+//
+// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
+// -mstackrealign to your build settings, feel free to #define
+// STBI_MINGW_ENABLE_SSE2.
+#define STBI_NO_SIMD
+#endif
+
+#if !defined(STBI_NO_SIMD) &&                                                  \
+    (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
+#define STBI_SSE2
+#include <emmintrin.h>
+
+#ifdef _MSC_VER
+
+#if _MSC_VER >= 1400 // not VC6
+#include <intrin.h>  // __cpuid
+static int stbi__cpuid3(void)
+{
+    int info[4];
+    __cpuid(info, 1);
+    return info[3];
+}
+#else
+static int stbi__cpuid3(void)
+{
+    int res;
+    __asm {
+      mov  eax,1
+      cpuid
+      mov  res,edx
+    }
+    return res;
+}
+#endif
+
+#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
+
+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
+static int stbi__sse2_available(void)
+{
+    int info3 = stbi__cpuid3();
+    return ((info3 >> 26) & 1) != 0;
+}
+#endif
+
+#else // assume GCC-style if not VC++
+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
+
+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
+static int stbi__sse2_available(void)
+{
+    // If we're even attempting to compile this on GCC/Clang, that means
+    // -msse2 is on, which means the compiler is allowed to use SSE2
+    // instructions at will, and so are we.
+    return 1;
+}
+#endif
+
+#endif
+#endif
+
+// ARM NEON
+#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
+#undef STBI_NEON
+#endif
+
+#ifdef STBI_NEON
+#include <arm_neon.h>
+// assume GCC or Clang on ARM targets
+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
+#endif
+
+#ifndef STBI_SIMD_ALIGN
+#define STBI_SIMD_ALIGN(type, name) type name
+#endif
+
+///////////////////////////////////////////////
+//
+//  stbi__context struct and start_xxx functions
+
+// stbi__context structure is our basic context used by all images, so it
+// contains all the IO context, plus some basic image information
+typedef struct {
+    stbi__uint32 img_x, img_y;
+    int img_n, img_out_n;
+
+    stbi_io_callbacks io;
+    void* io_user_data;
+
+    int read_from_callbacks;
+    int buflen;
+    stbi_uc buffer_start[128];
+
+    stbi_uc *img_buffer, *img_buffer_end;
+    stbi_uc *img_buffer_original, *img_buffer_original_end;
+} stbi__context;
+
+static void stbi__refill_buffer(stbi__context* s);
+
+// initialize a memory-decode context
+static void stbi__start_mem(stbi__context* s, stbi_uc const* buffer, int len)
+{
+    s->io.read = NULL;
+    s->read_from_callbacks = 0;
+    s->img_buffer = s->img_buffer_original = (stbi_uc*)buffer;
+    s->img_buffer_end = s->img_buffer_original_end = (stbi_uc*)buffer + len;
+}
+
+// initialize a callback-based context
+static void stbi__start_callbacks(stbi__context* s, stbi_io_callbacks* c,
+                                  void* user)
+{
+    s->io = *c;
+    s->io_user_data = user;
+    s->buflen = sizeof(s->buffer_start);
+    s->read_from_callbacks = 1;
+    s->img_buffer_original = s->buffer_start;
+    stbi__refill_buffer(s);
+    s->img_buffer_original_end = s->img_buffer_end;
+}
+
+#ifndef STBI_NO_STDIO
+
+static int stbi__stdio_read(void* user, char* data, int size)
+{
+    return (int)fread(data, 1, size, (FILE*)user);
+}
+
+static void stbi__stdio_skip(void* user, int n)
+{
+    fseek((FILE*)user, n, SEEK_CUR);
+}
+
+static int stbi__stdio_eof(void* user) { return feof((FILE*)user); }
+
+static stbi_io_callbacks stbi__stdio_callbacks = {
+    stbi__stdio_read,
+    stbi__stdio_skip,
+    stbi__stdio_eof,
+};
+
+static void stbi__start_file(stbi__context* s, FILE* f)
+{
+    stbi__start_callbacks(s, &stbi__stdio_callbacks, (void*)f);
+}
+
+// static void stop_file(stbi__context *s) { }
+
+#endif // !STBI_NO_STDIO
+
+static void stbi__rewind(stbi__context* s)
+{
+    // conceptually rewind SHOULD rewind to the beginning of the stream,
+    // but we just rewind to the beginning of the initial buffer, because
+    // we only use it after doing 'test', which only ever looks at at most 92
+    // bytes
+    s->img_buffer = s->img_buffer_original;
+    s->img_buffer_end = s->img_buffer_original_end;
+}
+
+enum { STBI_ORDER_RGB, STBI_ORDER_BGR };
+
+typedef struct {
+    int bits_per_channel;
+    int num_channels;
+    int channel_order;
+} stbi__result_info;
+
+#ifndef STBI_NO_JPEG
+static int stbi__jpeg_test(stbi__context* s);
+static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp,
+                             int req_comp, stbi__result_info* ri);
+static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PNG
+static int stbi__png_test(stbi__context* s);
+static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri);
+static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp);
+static int stbi__png_is16(stbi__context* s);
+#endif
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_test(stbi__context* s);
+static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri);
+static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_TGA
+static int stbi__tga_test(stbi__context* s);
+static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri);
+static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_test(stbi__context* s);
+static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri, int bpc);
+static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp);
+static int stbi__psd_is16(stbi__context* s);
+#endif
+
+#ifndef STBI_NO_HDR
+static int stbi__hdr_test(stbi__context* s);
+static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp,
+                             int req_comp, stbi__result_info* ri);
+static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_test(stbi__context* s);
+static void* stbi__pic_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri);
+static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_GIF
+static int stbi__gif_test(stbi__context* s);
+static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri);
+static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y,
+                                 int* z, int* comp, int req_comp);
+static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+#ifndef STBI_NO_PNM
+static int stbi__pnm_test(stbi__context* s);
+static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri);
+static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp);
+#endif
+
+// this is not threadsafe
+static const char* stbi__g_failure_reason;
+
+STBIDEF const char* stbi_failure_reason(void) { return stbi__g_failure_reason; }
+
+static int stbi__err(const char* str)
+{
+    stbi__g_failure_reason = str;
+    return 0;
+}
+
+static void* stbi__malloc(size_t size) { return STBI_MALLOC(size); }
+
+// stb_image uses ints pervasively, including for offset calculations.
+// therefore the largest decoded image size we can support with the
+// current code, even on 64-bit targets, is INT_MAX. this is not a
+// significant limitation for the intended use case.
+//
+// we do, however, need to make sure our size calculations don't
+// overflow. hence a few helper functions for size calculations that
+// multiply integers together, making sure that they're non-negative
+// and no overflow occurs.
+
+// return 1 if the sum is valid, 0 on overflow.
+// negative terms are considered invalid.
+static int stbi__addsizes_valid(int a, int b)
+{
+    if (b < 0)
+        return 0;
+    // now 0 <= b <= INT_MAX, hence also
+    // 0 <= INT_MAX - b <= INTMAX.
+    // And "a + b <= INT_MAX" (which might overflow) is the
+    // same as a <= INT_MAX - b (no overflow)
+    return a <= INT_MAX - b;
+}
+
+// returns 1 if the product is valid, 0 on overflow.
+// negative factors are considered invalid.
+static int stbi__mul2sizes_valid(int a, int b)
+{
+    if (a < 0 || b < 0)
+        return 0;
+    if (b == 0)
+        return 1; // mul-by-0 is always safe
+    // portable way to check for no overflows in a*b
+    return a <= INT_MAX / b;
+}
+
+// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
+static int stbi__mad2sizes_valid(int a, int b, int add)
+{
+    return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a * b, add);
+}
+
+// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
+static int stbi__mad3sizes_valid(int a, int b, int c, int add)
+{
+    return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) &&
+           stbi__addsizes_valid(a * b * c, add);
+}
+
+// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't
+// overflow
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
+{
+    return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) &&
+           stbi__mul2sizes_valid(a * b * c, d) &&
+           stbi__addsizes_valid(a * b * c * d, add);
+}
+#endif
+
+// mallocs with size overflow checking
+static void* stbi__malloc_mad2(int a, int b, int add)
+{
+    if (!stbi__mad2sizes_valid(a, b, add))
+        return NULL;
+    return stbi__malloc(a * b + add);
+}
+
+static void* stbi__malloc_mad3(int a, int b, int c, int add)
+{
+    if (!stbi__mad3sizes_valid(a, b, c, add))
+        return NULL;
+    return stbi__malloc(a * b * c + add);
+}
+
+#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
+static void* stbi__malloc_mad4(int a, int b, int c, int d, int add)
+{
+    if (!stbi__mad4sizes_valid(a, b, c, d, add))
+        return NULL;
+    return stbi__malloc(a * b * c * d + add);
+}
+#endif
+
+// stbi__err - error
+// stbi__errpf - error returning pointer to float
+// stbi__errpuc - error returning pointer to unsigned char
+
+#ifdef STBI_NO_FAILURE_STRINGS
+#define stbi__err(x, y) 0
+#elif defined(STBI_FAILURE_USERMSG)
+#define stbi__err(x, y) stbi__err(y)
+#else
+#define stbi__err(x, y) stbi__err(x)
+#endif
+
+#define stbi__errpf(x, y) ((float*)(size_t)(stbi__err(x, y) ? NULL : NULL))
+#define stbi__errpuc(x, y)                                                     \
+    ((unsigned char*)(size_t)(stbi__err(x, y) ? NULL : NULL))
+
+STBIDEF void stbi_image_free(void* retval_from_stbi_load)
+{
+    STBI_FREE(retval_from_stbi_load);
+}
+
+#ifndef STBI_NO_LINEAR
+static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp);
+#endif
+
+#ifndef STBI_NO_HDR
+static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp);
+#endif
+
+static int stbi__vertically_flip_on_load = 0;
+
+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
+{
+    stbi__vertically_flip_on_load = flag_true_if_should_flip;
+}
+
+static void* stbi__load_main(stbi__context* s, int* x, int* y, int* comp,
+                             int req_comp, stbi__result_info* ri, int bpc)
+{
+    memset(ri, 0,
+           sizeof(*ri)); // make sure it's initialized if we add new fields
+    ri->bits_per_channel =
+        8; // default is 8 so most paths don't have to be changed
+    ri->channel_order =
+        STBI_ORDER_RGB; // all current input & output are this, but this is here
+                        // so we can add BGR order
+    ri->num_channels = 0;
+
+#ifndef STBI_NO_JPEG
+    if (stbi__jpeg_test(s))
+        return stbi__jpeg_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_PNG
+    if (stbi__png_test(s))
+        return stbi__png_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_BMP
+    if (stbi__bmp_test(s))
+        return stbi__bmp_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_GIF
+    if (stbi__gif_test(s))
+        return stbi__gif_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_PSD
+    if (stbi__psd_test(s))
+        return stbi__psd_load(s, x, y, comp, req_comp, ri, bpc);
+#endif
+#ifndef STBI_NO_PIC
+    if (stbi__pic_test(s))
+        return stbi__pic_load(s, x, y, comp, req_comp, ri);
+#endif
+#ifndef STBI_NO_PNM
+    if (stbi__pnm_test(s))
+        return stbi__pnm_load(s, x, y, comp, req_comp, ri);
+#endif
+
+#ifndef STBI_NO_HDR
+    if (stbi__hdr_test(s)) {
+        float* hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri);
+        return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
+    }
+#endif
+
+#ifndef STBI_NO_TGA
+    // test tga last because it's a crappy test!
+    if (stbi__tga_test(s))
+        return stbi__tga_load(s, x, y, comp, req_comp, ri);
+#endif
+
+    return stbi__errpuc("unknown image type",
+                        "Image not of any known type, or corrupt");
+}
+
+static stbi_uc* stbi__convert_16_to_8(stbi__uint16* orig, int w, int h,
+                                      int channels)
+{
+    int i;
+    int img_len = w * h * channels;
+    stbi_uc* reduced;
+
+    reduced = (stbi_uc*)stbi__malloc(img_len);
+    if (reduced == NULL)
+        return stbi__errpuc("outofmem", "Out of memory");
+
+    for (i = 0; i < img_len; ++i)
+        reduced[i] = (stbi_uc)((orig[i] >> 8) &
+                               0xFF); // top half of each byte is sufficient
+                                      // approx of 16->8 bit scaling
+
+    STBI_FREE(orig);
+    return reduced;
+}
+
+static stbi__uint16* stbi__convert_8_to_16(stbi_uc* orig, int w, int h,
+                                           int channels)
+{
+    int i;
+    int img_len = w * h * channels;
+    stbi__uint16* enlarged;
+
+    enlarged = (stbi__uint16*)stbi__malloc(img_len * 2);
+    if (enlarged == NULL)
+        return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory");
+
+    for (i = 0; i < img_len; ++i)
+        enlarged[i] = (stbi__uint16)((orig[i] << 8) +
+                                     orig[i]); // replicate to high and low
+                                               // byte, maps 0->0, 255->0xffff
+
+    STBI_FREE(orig);
+    return enlarged;
+}
+
+static void stbi__vertical_flip(void* image, int w, int h, int bytes_per_pixel)
+{
+    int row;
+    size_t bytes_per_row = (size_t)w * bytes_per_pixel;
+    stbi_uc temp[2048];
+    stbi_uc* bytes = (stbi_uc*)image;
+
+    for (row = 0; row < (h >> 1); row++) {
+        stbi_uc* row0 = bytes + row * bytes_per_row;
+        stbi_uc* row1 = bytes + (h - row - 1) * bytes_per_row;
+        // swap row0 with row1
+        size_t bytes_left = bytes_per_row;
+        while (bytes_left) {
+            size_t bytes_copy =
+                (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
+            memcpy(temp, row0, bytes_copy);
+            memcpy(row0, row1, bytes_copy);
+            memcpy(row1, temp, bytes_copy);
+            row0 += bytes_copy;
+            row1 += bytes_copy;
+            bytes_left -= bytes_copy;
+        }
+    }
+}
+
+#ifndef STBI_NO_GIF
+static void stbi__vertical_flip_slices(void* image, int w, int h, int z,
+                                       int bytes_per_pixel)
+{
+    int slice;
+    int slice_size = w * h * bytes_per_pixel;
+
+    stbi_uc* bytes = (stbi_uc*)image;
+    for (slice = 0; slice < z; ++slice) {
+        stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
+        bytes += slice_size;
+    }
+}
+#endif
+
+static unsigned char* stbi__load_and_postprocess_8bit(stbi__context* s, int* x,
+                                                      int* y, int* comp,
+                                                      int req_comp)
+{
+    stbi__result_info ri;
+    void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
+
+    if (result == NULL)
+        return NULL;
+
+    if (ri.bits_per_channel != 8) {
+        STBI_ASSERT(ri.bits_per_channel == 16);
+        result = stbi__convert_16_to_8((stbi__uint16*)result, *x, *y,
+                                       req_comp == 0 ? *comp : req_comp);
+        ri.bits_per_channel = 8;
+    }
+
+    // @TODO: move stbi__convert_format to here
+
+    if (stbi__vertically_flip_on_load) {
+        int channels = req_comp ? req_comp : *comp;
+        stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
+    }
+
+    return (unsigned char*)result;
+}
+
+static stbi__uint16* stbi__load_and_postprocess_16bit(stbi__context* s, int* x,
+                                                      int* y, int* comp,
+                                                      int req_comp)
+{
+    stbi__result_info ri;
+    void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
+
+    if (result == NULL)
+        return NULL;
+
+    if (ri.bits_per_channel != 16) {
+        STBI_ASSERT(ri.bits_per_channel == 8);
+        result = stbi__convert_8_to_16((stbi_uc*)result, *x, *y,
+                                       req_comp == 0 ? *comp : req_comp);
+        ri.bits_per_channel = 16;
+    }
+
+    // @TODO: move stbi__convert_format16 to here
+    // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to
+    // keep more precision
+
+    if (stbi__vertically_flip_on_load) {
+        int channels = req_comp ? req_comp : *comp;
+        stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
+    }
+
+    return (stbi__uint16*)result;
+}
+
+#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
+static void stbi__float_postprocess(float* result, int* x, int* y, int* comp,
+                                    int req_comp)
+{
+    if (stbi__vertically_flip_on_load && result != NULL) {
+        int channels = req_comp ? req_comp : *comp;
+        stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
+    }
+}
+#endif
+
+#ifndef STBI_NO_STDIO
+
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(
+    unsigned int cp, unsigned long flags, const char* str, int cbmb,
+    wchar_t* widestr, int cchwide);
+STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(
+    unsigned int cp, unsigned long flags, const wchar_t* widestr, int cchwide,
+    char* str, int cbmb, const char* defchar, int* used_default);
+#endif
+
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+STBIDEF int stbi_convert_wchar_to_utf8(char* buffer, size_t bufferlen,
+                                       const wchar_t* input)
+{
+    return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer,
+                               bufferlen, NULL, NULL);
+}
+#endif
+
+static FILE* stbi__fopen(char const* filename, char const* mode)
+{
+    FILE* f;
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+    wchar_t wMode[64];
+    wchar_t wFilename[1024];
+    if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename,
+                                 sizeof(wFilename)))
+        return 0;
+
+    if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode,
+                                 sizeof(wMode)))
+        return 0;
+
+#if _MSC_VER >= 1400
+    if (0 != _wfopen_s(&f, wFilename, wMode))
+        f = 0;
+#else
+    f = _wfopen(wFilename, wMode);
+#endif
+
+#elif defined(_MSC_VER) && _MSC_VER >= 1400
+    if (0 != fopen_s(&f, filename, mode))
+        f = 0;
+#else
+    f = fopen(filename, mode);
+#endif
+    return f;
+}
+
+STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* comp,
+                           int req_comp)
+{
+    FILE* f = stbi__fopen(filename, "rb");
+    unsigned char* result;
+    if (!f)
+        return stbi__errpuc("can't fopen", "Unable to open file");
+    result = stbi_load_from_file(f, x, y, comp, req_comp);
+    fclose(f);
+    return result;
+}
+
+STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* comp,
+                                     int req_comp)
+{
+    unsigned char* result;
+    stbi__context s;
+    stbi__start_file(&s, f);
+    result = stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
+    if (result) {
+        // need to 'unget' all the characters in the IO buffer
+        fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR);
+    }
+    return result;
+}
+
+STBIDEF stbi__uint16* stbi_load_from_file_16(FILE* f, int* x, int* y, int* comp,
+                                             int req_comp)
+{
+    stbi__uint16* result;
+    stbi__context s;
+    stbi__start_file(&s, f);
+    result = stbi__load_and_postprocess_16bit(&s, x, y, comp, req_comp);
+    if (result) {
+        // need to 'unget' all the characters in the IO buffer
+        fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR);
+    }
+    return result;
+}
+
+STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* comp,
+                              int req_comp)
+{
+    FILE* f = stbi__fopen(filename, "rb");
+    stbi__uint16* result;
+    if (!f)
+        return (stbi_us*)stbi__errpuc("can't fopen", "Unable to open file");
+    result = stbi_load_from_file_16(f, x, y, comp, req_comp);
+    fclose(f);
+    return result;
+}
+
+#endif //! STBI_NO_STDIO
+
+STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len,
+                                          int* x, int* y, int* channels_in_file,
+                                          int desired_channels)
+{
+    stbi__context s;
+    stbi__start_mem(&s, buffer, len);
+    return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file,
+                                            desired_channels);
+}
+
+STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk,
+                                             void* user, int* x, int* y,
+                                             int* channels_in_file,
+                                             int desired_channels)
+{
+    stbi__context s;
+    stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+    return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file,
+                                            desired_channels);
+}
+
+STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x,
+                                       int* y, int* comp, int req_comp)
+{
+    stbi__context s;
+    stbi__start_mem(&s, buffer, len);
+    return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
+}
+
+STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk,
+                                          void* user, int* x, int* y, int* comp,
+                                          int req_comp)
+{
+    stbi__context s;
+    stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+    return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp);
+}
+
+#ifndef STBI_NO_GIF
+STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len,
+                                           int** delays, int* x, int* y, int* z,
+                                           int* comp, int req_comp)
+{
+    unsigned char* result;
+    stbi__context s;
+    stbi__start_mem(&s, buffer, len);
+
+    result = (unsigned char*)stbi__load_gif_main(&s, delays, x, y, z, comp,
+                                                 req_comp);
+    if (stbi__vertically_flip_on_load) {
+        stbi__vertical_flip_slices(result, *x, *y, *z, *comp);
+    }
+
+    return result;
+}
+#endif
+
+#ifndef STBI_NO_LINEAR
+static float* stbi__loadf_main(stbi__context* s, int* x, int* y, int* comp,
+                               int req_comp)
+{
+    unsigned char* data;
+#ifndef STBI_NO_HDR
+    if (stbi__hdr_test(s)) {
+        stbi__result_info ri;
+        float* hdr_data = stbi__hdr_load(s, x, y, comp, req_comp, &ri);
+        if (hdr_data)
+            stbi__float_postprocess(hdr_data, x, y, comp, req_comp);
+        return hdr_data;
+    }
+#endif
+    data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
+    if (data)
+        return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
+    return stbi__errpf("unknown image type",
+                       "Image not of any known type, or corrupt");
+}
+
+STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x,
+                                      int* y, int* comp, int req_comp)
+{
+    stbi__context s;
+    stbi__start_mem(&s, buffer, len);
+    return stbi__loadf_main(&s, x, y, comp, req_comp);
+}
+
+STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk,
+                                         void* user, int* x, int* y, int* comp,
+                                         int req_comp)
+{
+    stbi__context s;
+    stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+    return stbi__loadf_main(&s, x, y, comp, req_comp);
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* comp,
+                          int req_comp)
+{
+    float* result;
+    FILE* f = stbi__fopen(filename, "rb");
+    if (!f)
+        return stbi__errpf("can't fopen", "Unable to open file");
+    result = stbi_loadf_from_file(f, x, y, comp, req_comp);
+    fclose(f);
+    return result;
+}
+
+STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* comp,
+                                    int req_comp)
+{
+    stbi__context s;
+    stbi__start_file(&s, f);
+    return stbi__loadf_main(&s, x, y, comp, req_comp);
+}
+#endif // !STBI_NO_STDIO
+
+#endif // !STBI_NO_LINEAR
+
+// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
+// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
+// reports false!
+
+STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len)
+{
+#ifndef STBI_NO_HDR
+    stbi__context s;
+    stbi__start_mem(&s, buffer, len);
+    return stbi__hdr_test(&s);
+#else
+    STBI_NOTUSED(buffer);
+    STBI_NOTUSED(len);
+    return 0;
+#endif
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_is_hdr(char const* filename)
+{
+    FILE* f = stbi__fopen(filename, "rb");
+    int result = 0;
+    if (f) {
+        result = stbi_is_hdr_from_file(f);
+        fclose(f);
+    }
+    return result;
+}
+
+STBIDEF int stbi_is_hdr_from_file(FILE* f)
+{
+#ifndef STBI_NO_HDR
+    long pos = ftell(f);
+    int res;
+    stbi__context s;
+    stbi__start_file(&s, f);
+    res = stbi__hdr_test(&s);
+    fseek(f, pos, SEEK_SET);
+    return res;
+#else
+    STBI_NOTUSED(f);
+    return 0;
+#endif
+}
+#endif // !STBI_NO_STDIO
+
+STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk,
+                                       void* user)
+{
+#ifndef STBI_NO_HDR
+    stbi__context s;
+    stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user);
+    return stbi__hdr_test(&s);
+#else
+    STBI_NOTUSED(clbk);
+    STBI_NOTUSED(user);
+    return 0;
+#endif
+}
+
+#ifndef STBI_NO_LINEAR
+static float stbi__l2h_gamma = 2.2f, stbi__l2h_scale = 1.0f;
+
+STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
+STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
+#endif
+
+static float stbi__h2l_gamma_i = 1.0f / 2.2f, stbi__h2l_scale_i = 1.0f;
+
+STBIDEF void stbi_hdr_to_ldr_gamma(float gamma)
+{
+    stbi__h2l_gamma_i = 1 / gamma;
+}
+STBIDEF void stbi_hdr_to_ldr_scale(float scale)
+{
+    stbi__h2l_scale_i = 1 / scale;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// Common code used by all image loaders
+//
+
+enum { STBI__SCAN_load = 0, STBI__SCAN_type, STBI__SCAN_header };
+
+static void stbi__refill_buffer(stbi__context* s)
+{
+    int n = (s->io.read)(s->io_user_data, (char*)s->buffer_start, s->buflen);
+    if (n == 0) {
+        // at end of file, treat same as if from memory, but need to handle case
+        // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
+        s->read_from_callbacks = 0;
+        s->img_buffer = s->buffer_start;
+        s->img_buffer_end = s->buffer_start + 1;
+        *s->img_buffer = 0;
+    }
+    else {
+        s->img_buffer = s->buffer_start;
+        s->img_buffer_end = s->buffer_start + n;
+    }
+}
+
+stbi_inline static stbi_uc stbi__get8(stbi__context* s)
+{
+    if (s->img_buffer < s->img_buffer_end)
+        return *s->img_buffer++;
+    if (s->read_from_callbacks) {
+        stbi__refill_buffer(s);
+        return *s->img_buffer++;
+    }
+    return 0;
+}
+
+stbi_inline static int stbi__at_eof(stbi__context* s)
+{
+    if (s->io.read) {
+        if (!(s->io.eof)(s->io_user_data))
+            return 0;
+        // if feof() is true, check if buffer = end
+        // special case: we've only got the special 0 character at the end
+        if (s->read_from_callbacks == 0)
+            return 1;
+    }
+
+    return s->img_buffer >= s->img_buffer_end;
+}
+
+static void stbi__skip(stbi__context* s, int n)
+{
+    if (n < 0) {
+        s->img_buffer = s->img_buffer_end;
+        return;
+    }
+    if (s->io.read) {
+        int blen = (int)(s->img_buffer_end - s->img_buffer);
+        if (blen < n) {
+            s->img_buffer = s->img_buffer_end;
+            (s->io.skip)(s->io_user_data, n - blen);
+            return;
+        }
+    }
+    s->img_buffer += n;
+}
+
+static int stbi__getn(stbi__context* s, stbi_uc* buffer, int n)
+{
+    if (s->io.read) {
+        int blen = (int)(s->img_buffer_end - s->img_buffer);
+        if (blen < n) {
+            int res, count;
+
+            memcpy(buffer, s->img_buffer, blen);
+
+            count =
+                (s->io.read)(s->io_user_data, (char*)buffer + blen, n - blen);
+            res = (count == (n - blen));
+            s->img_buffer = s->img_buffer_end;
+            return res;
+        }
+    }
+
+    if (s->img_buffer + n <= s->img_buffer_end) {
+        memcpy(buffer, s->img_buffer, n);
+        s->img_buffer += n;
+        return 1;
+    }
+    else
+        return 0;
+}
+
+static int stbi__get16be(stbi__context* s)
+{
+    int z = stbi__get8(s);
+    return (z << 8) + stbi__get8(s);
+}
+
+static stbi__uint32 stbi__get32be(stbi__context* s)
+{
+    stbi__uint32 z = stbi__get16be(s);
+    return (z << 16) + stbi__get16be(s);
+}
+
+#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
+// nothing
+#else
+static int stbi__get16le(stbi__context* s)
+{
+    int z = stbi__get8(s);
+    return z + (stbi__get8(s) << 8);
+}
+#endif
+
+#ifndef STBI_NO_BMP
+static stbi__uint32 stbi__get32le(stbi__context* s)
+{
+    stbi__uint32 z = stbi__get16le(s);
+    return z + (stbi__get16le(s) << 16);
+}
+#endif
+
+#define STBI__BYTECAST(x)                                                      \
+    ((stbi_uc)((x)&255)) // truncate int to byte without warnings
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//  generic converter from built-in img_n to req_comp
+//    individual types do this automatically as much as possible (e.g. jpeg
+//    does all cases internally since it needs to colorspace convert anyway,
+//    and it never has alpha, so very few cases ). png can automatically
+//    interleave an alpha=255 channel, but falls back to this for other cases
+//
+//  assume data buffer is malloced, so malloc a new one and free that one
+//  only failure mode is malloc failing
+
+static stbi_uc stbi__compute_y(int r, int g, int b)
+{
+    return (stbi_uc)(((r * 77) + (g * 150) + (29 * b)) >> 8);
+}
+
+static unsigned char* stbi__convert_format(unsigned char* data, int img_n,
+                                           int req_comp, unsigned int x,
+                                           unsigned int y)
+{
+    int i, j;
+    unsigned char* good;
+
+    if (req_comp == img_n)
+        return data;
+    STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
+
+    good = (unsigned char*)stbi__malloc_mad3(req_comp, x, y, 0);
+    if (good == NULL) {
+        STBI_FREE(data);
+        return stbi__errpuc("outofmem", "Out of memory");
+    }
+
+    for (j = 0; j < (int)y; ++j) {
+        unsigned char* src = data + j * x * img_n;
+        unsigned char* dest = good + j * x * req_comp;
+
+#define STBI__COMBO(a, b) ((a)*8 + (b))
+#define STBI__CASE(a, b)                                                       \
+    case STBI__COMBO(a, b):                                                    \
+        for (i = x - 1; i >= 0; --i, src += a, dest += b)
+        // convert source image with img_n components to one with req_comp
+        // components; avoid switch per pixel, so use switch per scanline and
+        // massive macros
+        switch (STBI__COMBO(img_n, req_comp)) {
+            STBI__CASE(1, 2)
+            {
+                dest[0] = src[0];
+                dest[1] = 255;
+            }
+            break;
+            STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+            break;
+            STBI__CASE(1, 4)
+            {
+                dest[0] = dest[1] = dest[2] = src[0];
+                dest[3] = 255;
+            }
+            break;
+            STBI__CASE(2, 1) { dest[0] = src[0]; }
+            break;
+            STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+            break;
+            STBI__CASE(2, 4)
+            {
+                dest[0] = dest[1] = dest[2] = src[0];
+                dest[3] = src[1];
+            }
+            break;
+            STBI__CASE(3, 4)
+            {
+                dest[0] = src[0];
+                dest[1] = src[1];
+                dest[2] = src[2];
+                dest[3] = 255;
+            }
+            break;
+            STBI__CASE(3, 1)
+            {
+                dest[0] = stbi__compute_y(src[0], src[1], src[2]);
+            }
+            break;
+            STBI__CASE(3, 2)
+            {
+                dest[0] = stbi__compute_y(src[0], src[1], src[2]);
+                dest[1] = 255;
+            }
+            break;
+            STBI__CASE(4, 1)
+            {
+                dest[0] = stbi__compute_y(src[0], src[1], src[2]);
+            }
+            break;
+            STBI__CASE(4, 2)
+            {
+                dest[0] = stbi__compute_y(src[0], src[1], src[2]);
+                dest[1] = src[3];
+            }
+            break;
+            STBI__CASE(4, 3)
+            {
+                dest[0] = src[0];
+                dest[1] = src[1];
+                dest[2] = src[2];
+            }
+            break;
+        default:
+            STBI_ASSERT(0);
+        }
+#undef STBI__CASE
+    }
+
+    STBI_FREE(data);
+    return good;
+}
+
+static stbi__uint16 stbi__compute_y_16(int r, int g, int b)
+{
+    return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8);
+}
+
+static stbi__uint16* stbi__convert_format16(stbi__uint16* data, int img_n,
+                                            int req_comp, unsigned int x,
+                                            unsigned int y)
+{
+    int i, j;
+    stbi__uint16* good;
+
+    if (req_comp == img_n)
+        return data;
+    STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
+
+    good = (stbi__uint16*)stbi__malloc(req_comp * x * y * 2);
+    if (good == NULL) {
+        STBI_FREE(data);
+        return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory");
+    }
+
+    for (j = 0; j < (int)y; ++j) {
+        stbi__uint16* src = data + j * x * img_n;
+        stbi__uint16* dest = good + j * x * req_comp;
+
+#define STBI__COMBO(a, b) ((a)*8 + (b))
+#define STBI__CASE(a, b)                                                       \
+    case STBI__COMBO(a, b):                                                    \
+        for (i = x - 1; i >= 0; --i, src += a, dest += b)
+        // convert source image with img_n components to one with req_comp
+        // components; avoid switch per pixel, so use switch per scanline and
+        // massive macros
+        switch (STBI__COMBO(img_n, req_comp)) {
+            STBI__CASE(1, 2)
+            {
+                dest[0] = src[0];
+                dest[1] = 0xffff;
+            }
+            break;
+            STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+            break;
+            STBI__CASE(1, 4)
+            {
+                dest[0] = dest[1] = dest[2] = src[0];
+                dest[3] = 0xffff;
+            }
+            break;
+            STBI__CASE(2, 1) { dest[0] = src[0]; }
+            break;
+            STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; }
+            break;
+            STBI__CASE(2, 4)
+            {
+                dest[0] = dest[1] = dest[2] = src[0];
+                dest[3] = src[1];
+            }
+            break;
+            STBI__CASE(3, 4)
+            {
+                dest[0] = src[0];
+                dest[1] = src[1];
+                dest[2] = src[2];
+                dest[3] = 0xffff;
+            }
+            break;
+            STBI__CASE(3, 1)
+            {
+                dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
+            }
+            break;
+            STBI__CASE(3, 2)
+            {
+                dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
+                dest[1] = 0xffff;
+            }
+            break;
+            STBI__CASE(4, 1)
+            {
+                dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
+            }
+            break;
+            STBI__CASE(4, 2)
+            {
+                dest[0] = stbi__compute_y_16(src[0], src[1], src[2]);
+                dest[1] = src[3];
+            }
+            break;
+            STBI__CASE(4, 3)
+            {
+                dest[0] = src[0];
+                dest[1] = src[1];
+                dest[2] = src[2];
+            }
+            break;
+        default:
+            STBI_ASSERT(0);
+        }
+#undef STBI__CASE
+    }
+
+    STBI_FREE(data);
+    return good;
+}
+
+#ifndef STBI_NO_LINEAR
+static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp)
+{
+    int i, k, n;
+    float* output;
+    if (!data)
+        return NULL;
+    output = (float*)stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
+    if (output == NULL) {
+        STBI_FREE(data);
+        return stbi__errpf("outofmem", "Out of memory");
+    }
+    // compute number of non-alpha components
+    if (comp & 1)
+        n = comp;
+    else
+        n = comp - 1;
+    for (i = 0; i < x * y; ++i) {
+        for (k = 0; k < n; ++k) {
+            output[i * comp + k] =
+                (float)(pow(data[i * comp + k] / 255.0f, stbi__l2h_gamma) *
+                        stbi__l2h_scale);
+        }
+    }
+    if (n < comp) {
+        for (i = 0; i < x * y; ++i) {
+            output[i * comp + n] = data[i * comp + n] / 255.0f;
+        }
+    }
+    STBI_FREE(data);
+    return output;
+}
+#endif
+
+#ifndef STBI_NO_HDR
+#define stbi__float2int(x) ((int)(x))
+static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp)
+{
+    int i, k, n;
+    stbi_uc* output;
+    if (!data)
+        return NULL;
+    output = (stbi_uc*)stbi__malloc_mad3(x, y, comp, 0);
+    if (output == NULL) {
+        STBI_FREE(data);
+        return stbi__errpuc("outofmem", "Out of memory");
+    }
+    // compute number of non-alpha components
+    if (comp & 1)
+        n = comp;
+    else
+        n = comp - 1;
+    for (i = 0; i < x * y; ++i) {
+        for (k = 0; k < n; ++k) {
+            float z = (float)pow(data[i * comp + k] * stbi__h2l_scale_i,
+                                 stbi__h2l_gamma_i) *
+                          255 +
+                      0.5f;
+            if (z < 0)
+                z = 0;
+            if (z > 255)
+                z = 255;
+            output[i * comp + k] = (stbi_uc)stbi__float2int(z);
+        }
+        if (k < comp) {
+            float z = data[i * comp + k] * 255 + 0.5f;
+            if (z < 0)
+                z = 0;
+            if (z > 255)
+                z = 255;
+            output[i * comp + k] = (stbi_uc)stbi__float2int(z);
+        }
+    }
+    STBI_FREE(data);
+    return output;
+}
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//  "baseline" JPEG/JFIF decoder
+//
+//    simple implementation
+//      - doesn't support delayed output of y-dimension
+//      - simple interface (only one output format: 8-bit interleaved RGB)
+//      - doesn't try to recover corrupt jpegs
+//      - doesn't allow partial loading, loading multiple at once
+//      - still fast on x86 (copying globals into locals doesn't help x86)
+//      - allocates lots of intermediate memory (full size of all components)
+//        - non-interleaved case requires this anyway
+//        - allows good upsampling (see next)
+//    high-quality
+//      - upsampled channels are bilinearly interpolated, even across blocks
+//      - quality integer IDCT derived from IJG's 'slow'
+//    performance
+//      - fast huffman; reasonable integer IDCT
+//      - some SIMD kernels for common paths on targets with SSE2/NEON
+//      - uses a lot of intermediate memory, could cache poorly
+
+#ifndef STBI_NO_JPEG
+
+// huffman decoding acceleration
+#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache
+
+typedef struct {
+    stbi_uc fast[1 << FAST_BITS];
+    // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
+    stbi__uint16 code[256];
+    stbi_uc values[256];
+    stbi_uc size[257];
+    unsigned int maxcode[18];
+    int delta[17]; // old 'firstsymbol' - old 'firstcode'
+} stbi__huffman;
+
+typedef struct {
+    stbi__context* s;
+    stbi__huffman huff_dc[4];
+    stbi__huffman huff_ac[4];
+    stbi__uint16 dequant[4][64];
+    stbi__int16 fast_ac[4][1 << FAST_BITS];
+
+    // sizes for components, interleaved MCUs
+    int img_h_max, img_v_max;
+    int img_mcu_x, img_mcu_y;
+    int img_mcu_w, img_mcu_h;
+
+    // definition of jpeg image component
+    struct {
+        int id;
+        int h, v;
+        int tq;
+        int hd, ha;
+        int dc_pred;
+
+        int x, y, w2, h2;
+        stbi_uc* data;
+        void *raw_data, *raw_coeff;
+        stbi_uc* linebuf;
+        short* coeff;         // progressive only
+        int coeff_w, coeff_h; // number of 8x8 coefficient blocks
+    } img_comp[4];
+
+    stbi__uint32 code_buffer; // jpeg entropy-coded buffer
+    int code_bits;            // number of valid bits
+    unsigned char marker;     // marker seen while filling entropy buffer
+    int nomore;               // flag if we saw a marker so must stop
+
+    int progressive;
+    int spec_start;
+    int spec_end;
+    int succ_high;
+    int succ_low;
+    int eob_run;
+    int jfif;
+    int app14_color_transform; // Adobe APP14 tag
+    int rgb;
+
+    int scan_n, order[4];
+    int restart_interval, todo;
+
+    // kernels
+    void (*idct_block_kernel)(stbi_uc* out, int out_stride, short data[64]);
+    void (*YCbCr_to_RGB_kernel)(stbi_uc* out, const stbi_uc* y,
+                                const stbi_uc* pcb, const stbi_uc* pcr,
+                                int count, int step);
+    stbi_uc* (*resample_row_hv_2_kernel)(stbi_uc* out, stbi_uc* in_near,
+                                         stbi_uc* in_far, int w, int hs);
+} stbi__jpeg;
+
+static int stbi__build_huffman(stbi__huffman* h, int* count)
+{
+    int i, j, k = 0;
+    unsigned int code;
+    // build size list for each symbol (from JPEG spec)
+    for (i = 0; i < 16; ++i)
+        for (j = 0; j < count[i]; ++j)
+            h->size[k++] = (stbi_uc)(i + 1);
+    h->size[k] = 0;
+
+    // compute actual symbols (from jpeg spec)
+    code = 0;
+    k = 0;
+    for (j = 1; j <= 16; ++j) {
+        // compute delta to add to code to compute symbol id
+        h->delta[j] = k - code;
+        if (h->size[k] == j) {
+            while (h->size[k] == j)
+                h->code[k++] = (stbi__uint16)(code++);
+            if (code - 1 >= (1u << j))
+                return stbi__err("bad code lengths", "Corrupt JPEG");
+        }
+        // compute largest code + 1 for this size, preshifted as needed later
+        h->maxcode[j] = code << (16 - j);
+        code <<= 1;
+    }
+    h->maxcode[j] = 0xffffffff;
+
+    // build non-spec acceleration table; 255 is flag for not-accelerated
+    memset(h->fast, 255, 1 << FAST_BITS);
+    for (i = 0; i < k; ++i) {
+        int s = h->size[i];
+        if (s <= FAST_BITS) {
+            int c = h->code[i] << (FAST_BITS - s);
+            int m = 1 << (FAST_BITS - s);
+            for (j = 0; j < m; ++j) {
+                h->fast[c + j] = (stbi_uc)i;
+            }
+        }
+    }
+    return 1;
+}
+
+// build a table that decodes both magnitude and value of small ACs in
+// one go.
+static void stbi__build_fast_ac(stbi__int16* fast_ac, stbi__huffman* h)
+{
+    int i;
+    for (i = 0; i < (1 << FAST_BITS); ++i) {
+        stbi_uc fast = h->fast[i];
+        fast_ac[i] = 0;
+        if (fast < 255) {
+            int rs = h->values[fast];
+            int run = (rs >> 4) & 15;
+            int magbits = rs & 15;
+            int len = h->size[fast];
+
+            if (magbits && len + magbits <= FAST_BITS) {
+                // magnitude code followed by receive_extend code
+                int k = ((i << len) & ((1 << FAST_BITS) - 1)) >>
+                        (FAST_BITS - magbits);
+                int m = 1 << (magbits - 1);
+                if (k < m)
+                    k += (~0U << magbits) + 1;
+                // if the result is small enough, we can fit it in fast_ac table
+                if (k >= -128 && k <= 127)
+                    fast_ac[i] =
+                        (stbi__int16)((k * 256) + (run * 16) + (len + magbits));
+            }
+        }
+    }
+}
+
+static void stbi__grow_buffer_unsafe(stbi__jpeg* j)
+{
+    do {
+        unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
+        if (b == 0xff) {
+            int c = stbi__get8(j->s);
+            while (c == 0xff)
+                c = stbi__get8(j->s); // consume fill bytes
+            if (c != 0) {
+                j->marker = (unsigned char)c;
+                j->nomore = 1;
+                return;
+            }
+        }
+        j->code_buffer |= b << (24 - j->code_bits);
+        j->code_bits += 8;
+    } while (j->code_bits <= 24);
+}
+
+// (1 << n) - 1
+static const stbi__uint32 stbi__bmask[17] = {
+    0,   1,    3,    7,    15,   31,    63,    127,  255,
+    511, 1023, 2047, 4095, 8191, 16383, 32767, 65535};
+
+// decode a jpeg huffman value from the bitstream
+stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg* j, stbi__huffman* h)
+{
+    unsigned int temp;
+    int c, k;
+
+    if (j->code_bits < 16)
+        stbi__grow_buffer_unsafe(j);
+
+    // look at the top FAST_BITS and determine what symbol ID it is,
+    // if the code is <= FAST_BITS
+    c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
+    k = h->fast[c];
+    if (k < 255) {
+        int s = h->size[k];
+        if (s > j->code_bits)
+            return -1;
+        j->code_buffer <<= s;
+        j->code_bits -= s;
+        return h->values[k];
+    }
+
+    // naive test is to shift the code_buffer down so k bits are
+    // valid, then test against maxcode. To speed this up, we've
+    // preshifted maxcode left so that it has (16-k) 0s at the
+    // end; in other words, regardless of the number of bits, it
+    // wants to be compared against something shifted to have 16;
+    // that way we don't need to shift inside the loop.
+    temp = j->code_buffer >> 16;
+    for (k = FAST_BITS + 1;; ++k)
+        if (temp < h->maxcode[k])
+            break;
+    if (k == 17) {
+        // error! code not found
+        j->code_bits -= 16;
+        return -1;
+    }
+
+    if (k > j->code_bits)
+        return -1;
+
+    // convert the huffman code to the symbol id
+    c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
+    STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) &
+                 stbi__bmask[h->size[c]]) == h->code[c]);
+
+    // convert the id to a symbol
+    j->code_bits -= k;
+    j->code_buffer <<= k;
+    return h->values[c];
+}
+
+// bias[n] = (-1<<n) + 1
+static const int stbi__jbias[16] = {0,     -1,    -3,     -7,    -15,   -31,
+                                    -63,   -127,  -255,   -511,  -1023, -2047,
+                                    -4095, -8191, -16383, -32767};
+
+// combined JPEG 'receive' and JPEG 'extend', since baseline
+// always extends everything it receives.
+stbi_inline static int stbi__extend_receive(stbi__jpeg* j, int n)
+{
+    unsigned int k;
+    int sgn;
+    if (j->code_bits < n)
+        stbi__grow_buffer_unsafe(j);
+
+    sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB
+    k = stbi_lrot(j->code_buffer, n);
+    STBI_ASSERT(n >= 0 &&
+                n < (int)(sizeof(stbi__bmask) / sizeof(*stbi__bmask)));
+    j->code_buffer = k & ~stbi__bmask[n];
+    k &= stbi__bmask[n];
+    j->code_bits -= n;
+    return k + (stbi__jbias[n] & ~sgn);
+}
+
+// get some unsigned bits
+stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg* j, int n)
+{
+    unsigned int k;
+    if (j->code_bits < n)
+        stbi__grow_buffer_unsafe(j);
+    k = stbi_lrot(j->code_buffer, n);
+    j->code_buffer = k & ~stbi__bmask[n];
+    k &= stbi__bmask[n];
+    j->code_bits -= n;
+    return k;
+}
+
+stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg* j)
+{
+    unsigned int k;
+    if (j->code_bits < 1)
+        stbi__grow_buffer_unsafe(j);
+    k = j->code_buffer;
+    j->code_buffer <<= 1;
+    --j->code_bits;
+    return k & 0x80000000;
+}
+
+// given a value that's at position X in the zigzag stream,
+// where does it appear in the 8x8 matrix coded as row-major?
+static const stbi_uc stbi__jpeg_dezigzag[64 + 15] = {
+    0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5, 12, 19, 26, 33, 40,
+    48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28, 35, 42, 49, 56, 57, 50, 43, 36,
+    29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61,
+    54, 47, 55, 62, 63,
+    // let corrupt input sample past end
+    63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63};
+
+// decode one 64-entry block--
+static int stbi__jpeg_decode_block(stbi__jpeg* j, short data[64],
+                                   stbi__huffman* hdc, stbi__huffman* hac,
+                                   stbi__int16* fac, int b,
+                                   stbi__uint16* dequant)
+{
+    int diff, dc, k;
+    int t;
+
+    if (j->code_bits < 16)
+        stbi__grow_buffer_unsafe(j);
+    t = stbi__jpeg_huff_decode(j, hdc);
+    if (t < 0)
+        return stbi__err("bad huffman code", "Corrupt JPEG");
+
+    // 0 all the ac values now so we can do it 32-bits at a time
+    memset(data, 0, 64 * sizeof(data[0]));
+
+    diff = t ? stbi__extend_receive(j, t) : 0;
+    dc = j->img_comp[b].dc_pred + diff;
+    j->img_comp[b].dc_pred = dc;
+    data[0] = (short)(dc * dequant[0]);
+
+    // decode AC components, see JPEG spec
+    k = 1;
+    do {
+        unsigned int zig;
+        int c, r, s;
+        if (j->code_bits < 16)
+            stbi__grow_buffer_unsafe(j);
+        c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
+        r = fac[c];
+        if (r) {                // fast-AC path
+            k += (r >> 4) & 15; // run
+            s = r & 15;         // combined length
+            j->code_buffer <<= s;
+            j->code_bits -= s;
+            // decode into unzigzag'd location
+            zig = stbi__jpeg_dezigzag[k++];
+            data[zig] = (short)((r >> 8) * dequant[zig]);
+        }
+        else {
+            int rs = stbi__jpeg_huff_decode(j, hac);
+            if (rs < 0)
+                return stbi__err("bad huffman code", "Corrupt JPEG");
+            s = rs & 15;
+            r = rs >> 4;
+            if (s == 0) {
+                if (rs != 0xf0)
+                    break; // end block
+                k += 16;
+            }
+            else {
+                k += r;
+                // decode into unzigzag'd location
+                zig = stbi__jpeg_dezigzag[k++];
+                data[zig] = (short)(stbi__extend_receive(j, s) * dequant[zig]);
+            }
+        }
+    } while (k < 64);
+    return 1;
+}
+
+static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg* j, short data[64],
+                                           stbi__huffman* hdc, int b)
+{
+    int diff, dc;
+    int t;
+    if (j->spec_end != 0)
+        return stbi__err("can't merge dc and ac", "Corrupt JPEG");
+
+    if (j->code_bits < 16)
+        stbi__grow_buffer_unsafe(j);
+
+    if (j->succ_high == 0) {
+        // first scan for DC coefficient, must be first
+        memset(data, 0, 64 * sizeof(data[0])); // 0 all the ac values now
+        t = stbi__jpeg_huff_decode(j, hdc);
+        diff = t ? stbi__extend_receive(j, t) : 0;
+
+        dc = j->img_comp[b].dc_pred + diff;
+        j->img_comp[b].dc_pred = dc;
+        data[0] = (short)(dc << j->succ_low);
+    }
+    else {
+        // refinement scan for DC coefficient
+        if (stbi__jpeg_get_bit(j))
+            data[0] += (short)(1 << j->succ_low);
+    }
+    return 1;
+}
+
+// @OPTIMIZE: store non-zigzagged during the decode passes,
+// and only de-zigzag when dequantizing
+static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg* j, short data[64],
+                                           stbi__huffman* hac, stbi__int16* fac)
+{
+    int k;
+    if (j->spec_start == 0)
+        return stbi__err("can't merge dc and ac", "Corrupt JPEG");
+
+    if (j->succ_high == 0) {
+        int shift = j->succ_low;
+
+        if (j->eob_run) {
+            --j->eob_run;
+            return 1;
+        }
+
+        k = j->spec_start;
+        do {
+            unsigned int zig;
+            int c, r, s;
+            if (j->code_bits < 16)
+                stbi__grow_buffer_unsafe(j);
+            c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1);
+            r = fac[c];
+            if (r) {                // fast-AC path
+                k += (r >> 4) & 15; // run
+                s = r & 15;         // combined length
+                j->code_buffer <<= s;
+                j->code_bits -= s;
+                zig = stbi__jpeg_dezigzag[k++];
+                data[zig] = (short)((r >> 8) << shift);
+            }
+            else {
+                int rs = stbi__jpeg_huff_decode(j, hac);
+                if (rs < 0)
+                    return stbi__err("bad huffman code", "Corrupt JPEG");
+                s = rs & 15;
+                r = rs >> 4;
+                if (s == 0) {
+                    if (r < 15) {
+                        j->eob_run = (1 << r);
+                        if (r)
+                            j->eob_run += stbi__jpeg_get_bits(j, r);
+                        --j->eob_run;
+                        break;
+                    }
+                    k += 16;
+                }
+                else {
+                    k += r;
+                    zig = stbi__jpeg_dezigzag[k++];
+                    data[zig] = (short)(stbi__extend_receive(j, s) << shift);
+                }
+            }
+        } while (k <= j->spec_end);
+    }
+    else {
+        // refinement scan for these AC coefficients
+
+        short bit = (short)(1 << j->succ_low);
+
+        if (j->eob_run) {
+            --j->eob_run;
+            for (k = j->spec_start; k <= j->spec_end; ++k) {
+                short* p = &data[stbi__jpeg_dezigzag[k]];
+                if (*p != 0)
+                    if (stbi__jpeg_get_bit(j))
+                        if ((*p & bit) == 0) {
+                            if (*p > 0)
+                                *p += bit;
+                            else
+                                *p -= bit;
+                        }
+            }
+        }
+        else {
+            k = j->spec_start;
+            do {
+                int r, s;
+                int rs = stbi__jpeg_huff_decode(
+                    j, hac); // @OPTIMIZE see if we can use the fast path here,
+                             // advance-by-r is so slow, eh
+                if (rs < 0)
+                    return stbi__err("bad huffman code", "Corrupt JPEG");
+                s = rs & 15;
+                r = rs >> 4;
+                if (s == 0) {
+                    if (r < 15) {
+                        j->eob_run = (1 << r) - 1;
+                        if (r)
+                            j->eob_run += stbi__jpeg_get_bits(j, r);
+                        r = 64; // force end of block
+                    }
+                    else {
+                        // r=15 s=0 should write 16 0s, so we just do
+                        // a run of 15 0s and then write s (which is 0),
+                        // so we don't have to do anything special here
+                    }
+                }
+                else {
+                    if (s != 1)
+                        return stbi__err("bad huffman code", "Corrupt JPEG");
+                    // sign bit
+                    if (stbi__jpeg_get_bit(j))
+                        s = bit;
+                    else
+                        s = -bit;
+                }
+
+                // advance by r
+                while (k <= j->spec_end) {
+                    short* p = &data[stbi__jpeg_dezigzag[k++]];
+                    if (*p != 0) {
+                        if (stbi__jpeg_get_bit(j))
+                            if ((*p & bit) == 0) {
+                                if (*p > 0)
+                                    *p += bit;
+                                else
+                                    *p -= bit;
+                            }
+                    }
+                    else {
+                        if (r == 0) {
+                            *p = (short)s;
+                            break;
+                        }
+                        --r;
+                    }
+                }
+            } while (k <= j->spec_end);
+        }
+    }
+    return 1;
+}
+
+// take a -128..127 value and stbi__clamp it and convert to 0..255
+stbi_inline static stbi_uc stbi__clamp(int x)
+{
+    // trick to use a single test to catch both cases
+    if ((unsigned int)x > 255) {
+        if (x < 0)
+            return 0;
+        if (x > 255)
+            return 255;
+    }
+    return (stbi_uc)x;
+}
+
+#define stbi__f2f(x) ((int)(((x)*4096 + 0.5)))
+#define stbi__fsh(x) ((x)*4096)
+
+// derived from jidctint -- DCT_ISLOW
+#define STBI__IDCT_1D(s0, s1, s2, s3, s4, s5, s6, s7)                          \
+    int t0, t1, t2, t3, p1, p2, p3, p4, p5, x0, x1, x2, x3;                    \
+    p2 = s2;                                                                   \
+    p3 = s6;                                                                   \
+    p1 = (p2 + p3) * stbi__f2f(0.5411961f);                                    \
+    t2 = p1 + p3 * stbi__f2f(-1.847759065f);                                   \
+    t3 = p1 + p2 * stbi__f2f(0.765366865f);                                    \
+    p2 = s0;                                                                   \
+    p3 = s4;                                                                   \
+    t0 = stbi__fsh(p2 + p3);                                                   \
+    t1 = stbi__fsh(p2 - p3);                                                   \
+    x0 = t0 + t3;                                                              \
+    x3 = t0 - t3;                                                              \
+    x1 = t1 + t2;                                                              \
+    x2 = t1 - t2;                                                              \
+    t0 = s7;                                                                   \
+    t1 = s5;                                                                   \
+    t2 = s3;                                                                   \
+    t3 = s1;                                                                   \
+    p3 = t0 + t2;                                                              \
+    p4 = t1 + t3;                                                              \
+    p1 = t0 + t3;                                                              \
+    p2 = t1 + t2;                                                              \
+    p5 = (p3 + p4) * stbi__f2f(1.175875602f);                                  \
+    t0 = t0 * stbi__f2f(0.298631336f);                                         \
+    t1 = t1 * stbi__f2f(2.053119869f);                                         \
+    t2 = t2 * stbi__f2f(3.072711026f);                                         \
+    t3 = t3 * stbi__f2f(1.501321110f);                                         \
+    p1 = p5 + p1 * stbi__f2f(-0.899976223f);                                   \
+    p2 = p5 + p2 * stbi__f2f(-2.562915447f);                                   \
+    p3 = p3 * stbi__f2f(-1.961570560f);                                        \
+    p4 = p4 * stbi__f2f(-0.390180644f);                                        \
+    t3 += p1 + p4;                                                             \
+    t2 += p2 + p3;                                                             \
+    t1 += p2 + p4;                                                             \
+    t0 += p1 + p3;
+
+static void stbi__idct_block(stbi_uc* out, int out_stride, short data[64])
+{
+    int i, val[64], *v = val;
+    stbi_uc* o;
+    short* d = data;
+
+    // columns
+    for (i = 0; i < 8; ++i, ++d, ++v) {
+        // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
+        if (d[8] == 0 && d[16] == 0 && d[24] == 0 && d[32] == 0 && d[40] == 0 &&
+            d[48] == 0 && d[56] == 0) {
+            //    no shortcut                 0     seconds
+            //    (1|2|3|4|5|6|7)==0          0     seconds
+            //    all separate               -0.047 seconds
+            //    1 && 2|3 && 4|5 && 6|7:    -0.047 seconds
+            int dcterm = d[0] * 4;
+            v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] =
+                dcterm;
+        }
+        else {
+            STBI__IDCT_1D(d[0], d[8], d[16], d[24], d[32], d[40], d[48], d[56])
+            // constants scaled things up by 1<<12; let's bring them back
+            // down, but keep 2 extra bits of precision
+            x0 += 512;
+            x1 += 512;
+            x2 += 512;
+            x3 += 512;
+            v[0] = (x0 + t3) >> 10;
+            v[56] = (x0 - t3) >> 10;
+            v[8] = (x1 + t2) >> 10;
+            v[48] = (x1 - t2) >> 10;
+            v[16] = (x2 + t1) >> 10;
+            v[40] = (x2 - t1) >> 10;
+            v[24] = (x3 + t0) >> 10;
+            v[32] = (x3 - t0) >> 10;
+        }
+    }
+
+    for (i = 0, v = val, o = out; i < 8; ++i, v += 8, o += out_stride) {
+        // no fast case since the first 1D IDCT spread components out
+        STBI__IDCT_1D(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7])
+        // constants scaled things up by 1<<12, plus we had 1<<2 from first
+        // loop, plus horizontal and vertical each scale by sqrt(8) so together
+        // we've got an extra 1<<3, so 1<<17 total we need to remove.
+        // so we want to round that, which means adding 0.5 * 1<<17,
+        // aka 65536. Also, we'll end up with -128 to 127 that we want
+        // to encode as 0..255 by adding 128, so we'll add that before the shift
+        x0 += 65536 + (128 << 17);
+        x1 += 65536 + (128 << 17);
+        x2 += 65536 + (128 << 17);
+        x3 += 65536 + (128 << 17);
+        // tried computing the shifts into temps, or'ing the temps to see
+        // if any were out of range, but that was slower
+        o[0] = stbi__clamp((x0 + t3) >> 17);
+        o[7] = stbi__clamp((x0 - t3) >> 17);
+        o[1] = stbi__clamp((x1 + t2) >> 17);
+        o[6] = stbi__clamp((x1 - t2) >> 17);
+        o[2] = stbi__clamp((x2 + t1) >> 17);
+        o[5] = stbi__clamp((x2 - t1) >> 17);
+        o[3] = stbi__clamp((x3 + t0) >> 17);
+        o[4] = stbi__clamp((x3 - t0) >> 17);
+    }
+}
+
+#ifdef STBI_SSE2
+// sse2 integer IDCT. not the fastest possible implementation but it
+// produces bit-identical results to the generic C version so it's
+// fully "transparent".
+static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64])
+{
+    // This is constructed to match our regular (generic) integer IDCT exactly.
+    __m128i row0, row1, row2, row3, row4, row5, row6, row7;
+    __m128i tmp;
+
+// dot product constant: even elems=x, odd elems=y
+#define dct_const(x, y) _mm_setr_epi16((x), (y), (x), (y), (x), (y), (x), (y))
+
+// out(0) = c0[even]*x + c0[odd]*y   (c0, x, y 16-bit, out 32-bit)
+// out(1) = c1[even]*x + c1[odd]*y
+#define dct_rot(out0, out1, x, y, c0, c1)                                      \
+    __m128i c0##lo = _mm_unpacklo_epi16((x), (y));                             \
+    __m128i c0##hi = _mm_unpackhi_epi16((x), (y));                             \
+    __m128i out0##_l = _mm_madd_epi16(c0##lo, c0);                             \
+    __m128i out0##_h = _mm_madd_epi16(c0##hi, c0);                             \
+    __m128i out1##_l = _mm_madd_epi16(c0##lo, c1);                             \
+    __m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
+
+// out = in << 12  (in 16-bit, out 32-bit)
+#define dct_widen(out, in)                                                     \
+    __m128i out##_l =                                                          \
+        _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4);      \
+    __m128i out##_h =                                                          \
+        _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
+
+// wide add
+#define dct_wadd(out, a, b)                                                    \
+    __m128i out##_l = _mm_add_epi32(a##_l, b##_l);                             \
+    __m128i out##_h = _mm_add_epi32(a##_h, b##_h)
+
+// wide sub
+#define dct_wsub(out, a, b)                                                    \
+    __m128i out##_l = _mm_sub_epi32(a##_l, b##_l);                             \
+    __m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
+
+// butterfly a/b, add bias, then shift by "s" and pack
+#define dct_bfly32o(out0, out1, a, b, bias, s)                                 \
+    {                                                                          \
+        __m128i abiased_l = _mm_add_epi32(a##_l, bias);                        \
+        __m128i abiased_h = _mm_add_epi32(a##_h, bias);                        \
+        dct_wadd(sum, abiased, b);                                             \
+        dct_wsub(dif, abiased, b);                                             \
+        out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s),                       \
+                               _mm_srai_epi32(sum_h, s));                      \
+        out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s),                       \
+                               _mm_srai_epi32(dif_h, s));                      \
+    }
+
+// 8-bit interleave step (for transposes)
+#define dct_interleave8(a, b)                                                  \
+    tmp = a;                                                                   \
+    a = _mm_unpacklo_epi8(a, b);                                               \
+    b = _mm_unpackhi_epi8(tmp, b)
+
+// 16-bit interleave step (for transposes)
+#define dct_interleave16(a, b)                                                 \
+    tmp = a;                                                                   \
+    a = _mm_unpacklo_epi16(a, b);                                              \
+    b = _mm_unpackhi_epi16(tmp, b)
+
+#define dct_pass(bias, shift)                                                  \
+    {                                                                          \
+        /* even part */                                                        \
+        dct_rot(t2e, t3e, row2, row6, rot0_0, rot0_1);                         \
+        __m128i sum04 = _mm_add_epi16(row0, row4);                             \
+        __m128i dif04 = _mm_sub_epi16(row0, row4);                             \
+        dct_widen(t0e, sum04);                                                 \
+        dct_widen(t1e, dif04);                                                 \
+        dct_wadd(x0, t0e, t3e);                                                \
+        dct_wsub(x3, t0e, t3e);                                                \
+        dct_wadd(x1, t1e, t2e);                                                \
+        dct_wsub(x2, t1e, t2e);                                                \
+        /* odd part */                                                         \
+        dct_rot(y0o, y2o, row7, row3, rot2_0, rot2_1);                         \
+        dct_rot(y1o, y3o, row5, row1, rot3_0, rot3_1);                         \
+        __m128i sum17 = _mm_add_epi16(row1, row7);                             \
+        __m128i sum35 = _mm_add_epi16(row3, row5);                             \
+        dct_rot(y4o, y5o, sum17, sum35, rot1_0, rot1_1);                       \
+        dct_wadd(x4, y0o, y4o);                                                \
+        dct_wadd(x5, y1o, y5o);                                                \
+        dct_wadd(x6, y2o, y5o);                                                \
+        dct_wadd(x7, y3o, y4o);                                                \
+        dct_bfly32o(row0, row7, x0, x7, bias, shift);                          \
+        dct_bfly32o(row1, row6, x1, x6, bias, shift);                          \
+        dct_bfly32o(row2, row5, x2, x5, bias, shift);                          \
+        dct_bfly32o(row3, row4, x3, x4, bias, shift);                          \
+    }
+
+    __m128i rot0_0 =
+        dct_const(stbi__f2f(0.5411961f),
+                  stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
+    __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f(0.765366865f),
+                               stbi__f2f(0.5411961f));
+    __m128i rot1_0 =
+        dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f),
+                  stbi__f2f(1.175875602f));
+    __m128i rot1_1 =
+        dct_const(stbi__f2f(1.175875602f),
+                  stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
+    __m128i rot2_0 =
+        dct_const(stbi__f2f(-1.961570560f) + stbi__f2f(0.298631336f),
+                  stbi__f2f(-1.961570560f));
+    __m128i rot2_1 =
+        dct_const(stbi__f2f(-1.961570560f),
+                  stbi__f2f(-1.961570560f) + stbi__f2f(3.072711026f));
+    __m128i rot3_0 =
+        dct_const(stbi__f2f(-0.390180644f) + stbi__f2f(2.053119869f),
+                  stbi__f2f(-0.390180644f));
+    __m128i rot3_1 =
+        dct_const(stbi__f2f(-0.390180644f),
+                  stbi__f2f(-0.390180644f) + stbi__f2f(1.501321110f));
+
+    // rounding biases in column/row passes, see stbi__idct_block for
+    // explanation.
+    __m128i bias_0 = _mm_set1_epi32(512);
+    __m128i bias_1 = _mm_set1_epi32(65536 + (128 << 17));
+
+    // load
+    row0 = _mm_load_si128((const __m128i*)(data + 0 * 8));
+    row1 = _mm_load_si128((const __m128i*)(data + 1 * 8));
+    row2 = _mm_load_si128((const __m128i*)(data + 2 * 8));
+    row3 = _mm_load_si128((const __m128i*)(data + 3 * 8));
+    row4 = _mm_load_si128((const __m128i*)(data + 4 * 8));
+    row5 = _mm_load_si128((const __m128i*)(data + 5 * 8));
+    row6 = _mm_load_si128((const __m128i*)(data + 6 * 8));
+    row7 = _mm_load_si128((const __m128i*)(data + 7 * 8));
+
+    // column pass
+    dct_pass(bias_0, 10);
+
+    {
+        // 16bit 8x8 transpose pass 1
+        dct_interleave16(row0, row4);
+        dct_interleave16(row1, row5);
+        dct_interleave16(row2, row6);
+        dct_interleave16(row3, row7);
+
+        // transpose pass 2
+        dct_interleave16(row0, row2);
+        dct_interleave16(row1, row3);
+        dct_interleave16(row4, row6);
+        dct_interleave16(row5, row7);
+
+        // transpose pass 3
+        dct_interleave16(row0, row1);
+        dct_interleave16(row2, row3);
+        dct_interleave16(row4, row5);
+        dct_interleave16(row6, row7);
+    }
+
+    // row pass
+    dct_pass(bias_1, 17);
+
+    {
+        // pack
+        __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
+        __m128i p1 = _mm_packus_epi16(row2, row3);
+        __m128i p2 = _mm_packus_epi16(row4, row5);
+        __m128i p3 = _mm_packus_epi16(row6, row7);
+
+        // 8bit 8x8 transpose pass 1
+        dct_interleave8(p0, p2); // a0e0a1e1...
+        dct_interleave8(p1, p3); // c0g0c1g1...
+
+        // transpose pass 2
+        dct_interleave8(p0, p1); // a0c0e0g0...
+        dct_interleave8(p2, p3); // b0d0f0h0...
+
+        // transpose pass 3
+        dct_interleave8(p0, p2); // a0b0c0d0...
+        dct_interleave8(p1, p3); // a4b4c4d4...
+
+        // store
+        _mm_storel_epi64((__m128i*)out, p0);
+        out += out_stride;
+        _mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p0, 0x4e));
+        out += out_stride;
+        _mm_storel_epi64((__m128i*)out, p2);
+        out += out_stride;
+        _mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p2, 0x4e));
+        out += out_stride;
+        _mm_storel_epi64((__m128i*)out, p1);
+        out += out_stride;
+        _mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p1, 0x4e));
+        out += out_stride;
+        _mm_storel_epi64((__m128i*)out, p3);
+        out += out_stride;
+        _mm_storel_epi64((__m128i*)out, _mm_shuffle_epi32(p3, 0x4e));
+    }
+
+#undef dct_const
+#undef dct_rot
+#undef dct_widen
+#undef dct_wadd
+#undef dct_wsub
+#undef dct_bfly32o
+#undef dct_interleave8
+#undef dct_interleave16
+#undef dct_pass
+}
+
+#endif // STBI_SSE2
+
+#ifdef STBI_NEON
+
+// NEON integer IDCT. should produce bit-identical
+// results to the generic C version.
+static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64])
+{
+    int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
+
+    int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
+    int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
+    int16x4_t rot0_2 = vdup_n_s16(stbi__f2f(0.765366865f));
+    int16x4_t rot1_0 = vdup_n_s16(stbi__f2f(1.175875602f));
+    int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
+    int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
+    int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
+    int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
+    int16x4_t rot3_0 = vdup_n_s16(stbi__f2f(0.298631336f));
+    int16x4_t rot3_1 = vdup_n_s16(stbi__f2f(2.053119869f));
+    int16x4_t rot3_2 = vdup_n_s16(stbi__f2f(3.072711026f));
+    int16x4_t rot3_3 = vdup_n_s16(stbi__f2f(1.501321110f));
+
+#define dct_long_mul(out, inq, coeff)                                          \
+    int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff);                   \
+    int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
+
+#define dct_long_mac(out, acc, inq, coeff)                                     \
+    int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff);          \
+    int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
+
+#define dct_widen(out, inq)                                                    \
+    int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12);                    \
+    int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
+
+// wide add
+#define dct_wadd(out, a, b)                                                    \
+    int32x4_t out##_l = vaddq_s32(a##_l, b##_l);                               \
+    int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
+
+// wide sub
+#define dct_wsub(out, a, b)                                                    \
+    int32x4_t out##_l = vsubq_s32(a##_l, b##_l);                               \
+    int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
+
+// butterfly a/b, then shift using "shiftop" by "s" and pack
+#define dct_bfly32o(out0, out1, a, b, shiftop, s)                              \
+    {                                                                          \
+        dct_wadd(sum, a, b);                                                   \
+        dct_wsub(dif, a, b);                                                   \
+        out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s));             \
+        out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s));             \
+    }
+
+#define dct_pass(shiftop, shift)                                               \
+    {                                                                          \
+        /* even part */                                                        \
+        int16x8_t sum26 = vaddq_s16(row2, row6);                               \
+        dct_long_mul(p1e, sum26, rot0_0);                                      \
+        dct_long_mac(t2e, p1e, row6, rot0_1);                                  \
+        dct_long_mac(t3e, p1e, row2, rot0_2);                                  \
+        int16x8_t sum04 = vaddq_s16(row0, row4);                               \
+        int16x8_t dif04 = vsubq_s16(row0, row4);                               \
+        dct_widen(t0e, sum04);                                                 \
+        dct_widen(t1e, dif04);                                                 \
+        dct_wadd(x0, t0e, t3e);                                                \
+        dct_wsub(x3, t0e, t3e);                                                \
+        dct_wadd(x1, t1e, t2e);                                                \
+        dct_wsub(x2, t1e, t2e);                                                \
+        /* odd part */                                                         \
+        int16x8_t sum15 = vaddq_s16(row1, row5);                               \
+        int16x8_t sum17 = vaddq_s16(row1, row7);                               \
+        int16x8_t sum35 = vaddq_s16(row3, row5);                               \
+        int16x8_t sum37 = vaddq_s16(row3, row7);                               \
+        int16x8_t sumodd = vaddq_s16(sum17, sum35);                            \
+        dct_long_mul(p5o, sumodd, rot1_0);                                     \
+        dct_long_mac(p1o, p5o, sum17, rot1_1);                                 \
+        dct_long_mac(p2o, p5o, sum35, rot1_2);                                 \
+        dct_long_mul(p3o, sum37, rot2_0);                                      \
+        dct_long_mul(p4o, sum15, rot2_1);                                      \
+        dct_wadd(sump13o, p1o, p3o);                                           \
+        dct_wadd(sump24o, p2o, p4o);                                           \
+        dct_wadd(sump23o, p2o, p3o);                                           \
+        dct_wadd(sump14o, p1o, p4o);                                           \
+        dct_long_mac(x4, sump13o, row7, rot3_0);                               \
+        dct_long_mac(x5, sump24o, row5, rot3_1);                               \
+        dct_long_mac(x6, sump23o, row3, rot3_2);                               \
+        dct_long_mac(x7, sump14o, row1, rot3_3);                               \
+        dct_bfly32o(row0, row7, x0, x7, shiftop, shift);                       \
+        dct_bfly32o(row1, row6, x1, x6, shiftop, shift);                       \
+        dct_bfly32o(row2, row5, x2, x5, shiftop, shift);                       \
+        dct_bfly32o(row3, row4, x3, x4, shiftop, shift);                       \
+    }
+
+    // load
+    row0 = vld1q_s16(data + 0 * 8);
+    row1 = vld1q_s16(data + 1 * 8);
+    row2 = vld1q_s16(data + 2 * 8);
+    row3 = vld1q_s16(data + 3 * 8);
+    row4 = vld1q_s16(data + 4 * 8);
+    row5 = vld1q_s16(data + 5 * 8);
+    row6 = vld1q_s16(data + 6 * 8);
+    row7 = vld1q_s16(data + 7 * 8);
+
+    // add DC bias
+    row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
+
+    // column pass
+    dct_pass(vrshrn_n_s32, 10);
+
+    // 16bit 8x8 transpose
+    {
+// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
+// whether compilers actually get this is another story, sadly.
+#define dct_trn16(x, y)                                                        \
+    {                                                                          \
+        int16x8x2_t t = vtrnq_s16(x, y);                                       \
+        x = t.val[0];                                                          \
+        y = t.val[1];                                                          \
+    }
+#define dct_trn32(x, y)                                                        \
+    {                                                                          \
+        int32x4x2_t t =                                                        \
+            vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y));     \
+        x = vreinterpretq_s16_s32(t.val[0]);                                   \
+        y = vreinterpretq_s16_s32(t.val[1]);                                   \
+    }
+#define dct_trn64(x, y)                                                        \
+    {                                                                          \
+        int16x8_t x0 = x;                                                      \
+        int16x8_t y0 = y;                                                      \
+        x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0));                  \
+        y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0));                \
+    }
+
+        // pass 1
+        dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
+        dct_trn16(row2, row3);
+        dct_trn16(row4, row5);
+        dct_trn16(row6, row7);
+
+        // pass 2
+        dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
+        dct_trn32(row1, row3);
+        dct_trn32(row4, row6);
+        dct_trn32(row5, row7);
+
+        // pass 3
+        dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
+        dct_trn64(row1, row5);
+        dct_trn64(row2, row6);
+        dct_trn64(row3, row7);
+
+#undef dct_trn16
+#undef dct_trn32
+#undef dct_trn64
+    }
+
+    // row pass
+    // vrshrn_n_s32 only supports shifts up to 16, we need
+    // 17. so do a non-rounding shift of 16 first then follow
+    // up with a rounding shift by 1.
+    dct_pass(vshrn_n_s32, 16);
+
+    {
+        // pack and round
+        uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
+        uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
+        uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
+        uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
+        uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
+        uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
+        uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
+        uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
+
+        // again, these can translate into one instruction, but often don't.
+#define dct_trn8_8(x, y)                                                       \
+    {                                                                          \
+        uint8x8x2_t t = vtrn_u8(x, y);                                         \
+        x = t.val[0];                                                          \
+        y = t.val[1];                                                          \
+    }
+#define dct_trn8_16(x, y)                                                      \
+    {                                                                          \
+        uint16x4x2_t t =                                                       \
+            vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y));          \
+        x = vreinterpret_u8_u16(t.val[0]);                                     \
+        y = vreinterpret_u8_u16(t.val[1]);                                     \
+    }
+#define dct_trn8_32(x, y)                                                      \
+    {                                                                          \
+        uint32x2x2_t t =                                                       \
+            vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y));          \
+        x = vreinterpret_u8_u32(t.val[0]);                                     \
+        y = vreinterpret_u8_u32(t.val[1]);                                     \
+    }
+
+        // sadly can't use interleaved stores here since we only write
+        // 8 bytes to each scan line!
+
+        // 8x8 8-bit transpose pass 1
+        dct_trn8_8(p0, p1);
+        dct_trn8_8(p2, p3);
+        dct_trn8_8(p4, p5);
+        dct_trn8_8(p6, p7);
+
+        // pass 2
+        dct_trn8_16(p0, p2);
+        dct_trn8_16(p1, p3);
+        dct_trn8_16(p4, p6);
+        dct_trn8_16(p5, p7);
+
+        // pass 3
+        dct_trn8_32(p0, p4);
+        dct_trn8_32(p1, p5);
+        dct_trn8_32(p2, p6);
+        dct_trn8_32(p3, p7);
+
+        // store
+        vst1_u8(out, p0);
+        out += out_stride;
+        vst1_u8(out, p1);
+        out += out_stride;
+        vst1_u8(out, p2);
+        out += out_stride;
+        vst1_u8(out, p3);
+        out += out_stride;
+        vst1_u8(out, p4);
+        out += out_stride;
+        vst1_u8(out, p5);
+        out += out_stride;
+        vst1_u8(out, p6);
+        out += out_stride;
+        vst1_u8(out, p7);
+
+#undef dct_trn8_8
+#undef dct_trn8_16
+#undef dct_trn8_32
+    }
+
+#undef dct_long_mul
+#undef dct_long_mac
+#undef dct_widen
+#undef dct_wadd
+#undef dct_wsub
+#undef dct_bfly32o
+#undef dct_pass
+}
+
+#endif // STBI_NEON
+
+#define STBI__MARKER_none 0xff
+// if there's a pending marker from the entropy stream, return that
+// otherwise, fetch from the stream and get a marker. if there's no
+// marker, return 0xff, which is never a valid marker value
+static stbi_uc stbi__get_marker(stbi__jpeg* j)
+{
+    stbi_uc x;
+    if (j->marker != STBI__MARKER_none) {
+        x = j->marker;
+        j->marker = STBI__MARKER_none;
+        return x;
+    }
+    x = stbi__get8(j->s);
+    if (x != 0xff)
+        return STBI__MARKER_none;
+    while (x == 0xff)
+        x = stbi__get8(j->s); // consume repeated 0xff fill bytes
+    return x;
+}
+
+// in each scan, we'll have scan_n components, and the order
+// of the components is specified by order[]
+#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7)
+
+// after a restart interval, stbi__jpeg_reset the entropy decoder and
+// the dc prediction
+static void stbi__jpeg_reset(stbi__jpeg* j)
+{
+    j->code_bits = 0;
+    j->code_buffer = 0;
+    j->nomore = 0;
+    j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred =
+        j->img_comp[3].dc_pred = 0;
+    j->marker = STBI__MARKER_none;
+    j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
+    j->eob_run = 0;
+    // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
+    // since we don't even allow 1<<30 pixels
+}
+
+static int stbi__parse_entropy_coded_data(stbi__jpeg* z)
+{
+    stbi__jpeg_reset(z);
+    if (!z->progressive) {
+        if (z->scan_n == 1) {
+            int i, j;
+            STBI_SIMD_ALIGN(short, data[64]);
+            int n = z->order[0];
+            // non-interleaved data, we just need to process one block at a
+            // time, in trivial scanline order number of blocks to do just
+            // depends on how many actual "pixels" this component has,
+            // independent of interleaved MCU blocking and such
+            int w = (z->img_comp[n].x + 7) >> 3;
+            int h = (z->img_comp[n].y + 7) >> 3;
+            for (j = 0; j < h; ++j) {
+                for (i = 0; i < w; ++i) {
+                    int ha = z->img_comp[n].ha;
+                    if (!stbi__jpeg_decode_block(
+                            z, data, z->huff_dc + z->img_comp[n].hd,
+                            z->huff_ac + ha, z->fast_ac[ha], n,
+                            z->dequant[z->img_comp[n].tq]))
+                        return 0;
+                    z->idct_block_kernel(z->img_comp[n].data +
+                                             z->img_comp[n].w2 * j * 8 + i * 8,
+                                         z->img_comp[n].w2, data);
+                    // every data block is an MCU, so countdown the restart
+                    // interval
+                    if (--z->todo <= 0) {
+                        if (z->code_bits < 24)
+                            stbi__grow_buffer_unsafe(z);
+                        // if it's NOT a restart, then just bail, so we get
+                        // corrupt data rather than no data
+                        if (!STBI__RESTART(z->marker))
+                            return 1;
+                        stbi__jpeg_reset(z);
+                    }
+                }
+            }
+            return 1;
+        }
+        else { // interleaved
+            int i, j, k, x, y;
+            STBI_SIMD_ALIGN(short, data[64]);
+            for (j = 0; j < z->img_mcu_y; ++j) {
+                for (i = 0; i < z->img_mcu_x; ++i) {
+                    // scan an interleaved mcu... process scan_n components in
+                    // order
+                    for (k = 0; k < z->scan_n; ++k) {
+                        int n = z->order[k];
+                        // scan out an mcu's worth of this component; that's
+                        // just determined by the basic H and V specified for
+                        // the component
+                        for (y = 0; y < z->img_comp[n].v; ++y) {
+                            for (x = 0; x < z->img_comp[n].h; ++x) {
+                                int x2 = (i * z->img_comp[n].h + x) * 8;
+                                int y2 = (j * z->img_comp[n].v + y) * 8;
+                                int ha = z->img_comp[n].ha;
+                                if (!stbi__jpeg_decode_block(
+                                        z, data, z->huff_dc + z->img_comp[n].hd,
+                                        z->huff_ac + ha, z->fast_ac[ha], n,
+                                        z->dequant[z->img_comp[n].tq]))
+                                    return 0;
+                                z->idct_block_kernel(
+                                    z->img_comp[n].data +
+                                        z->img_comp[n].w2 * y2 + x2,
+                                    z->img_comp[n].w2, data);
+                            }
+                        }
+                    }
+                    // after all interleaved components, that's an interleaved
+                    // MCU, so now count down the restart interval
+                    if (--z->todo <= 0) {
+                        if (z->code_bits < 24)
+                            stbi__grow_buffer_unsafe(z);
+                        if (!STBI__RESTART(z->marker))
+                            return 1;
+                        stbi__jpeg_reset(z);
+                    }
+                }
+            }
+            return 1;
+        }
+    }
+    else {
+        if (z->scan_n == 1) {
+            int i, j;
+            int n = z->order[0];
+            // non-interleaved data, we just need to process one block at a
+            // time, in trivial scanline order number of blocks to do just
+            // depends on how many actual "pixels" this component has,
+            // independent of interleaved MCU blocking and such
+            int w = (z->img_comp[n].x + 7) >> 3;
+            int h = (z->img_comp[n].y + 7) >> 3;
+            for (j = 0; j < h; ++j) {
+                for (i = 0; i < w; ++i) {
+                    short* data = z->img_comp[n].coeff +
+                                  64 * (i + j * z->img_comp[n].coeff_w);
+                    if (z->spec_start == 0) {
+                        if (!stbi__jpeg_decode_block_prog_dc(
+                                z, data, &z->huff_dc[z->img_comp[n].hd], n))
+                            return 0;
+                    }
+                    else {
+                        int ha = z->img_comp[n].ha;
+                        if (!stbi__jpeg_decode_block_prog_ac(
+                                z, data, &z->huff_ac[ha], z->fast_ac[ha]))
+                            return 0;
+                    }
+                    // every data block is an MCU, so countdown the restart
+                    // interval
+                    if (--z->todo <= 0) {
+                        if (z->code_bits < 24)
+                            stbi__grow_buffer_unsafe(z);
+                        if (!STBI__RESTART(z->marker))
+                            return 1;
+                        stbi__jpeg_reset(z);
+                    }
+                }
+            }
+            return 1;
+        }
+        else { // interleaved
+            int i, j, k, x, y;
+            for (j = 0; j < z->img_mcu_y; ++j) {
+                for (i = 0; i < z->img_mcu_x; ++i) {
+                    // scan an interleaved mcu... process scan_n components in
+                    // order
+                    for (k = 0; k < z->scan_n; ++k) {
+                        int n = z->order[k];
+                        // scan out an mcu's worth of this component; that's
+                        // just determined by the basic H and V specified for
+                        // the component
+                        for (y = 0; y < z->img_comp[n].v; ++y) {
+                            for (x = 0; x < z->img_comp[n].h; ++x) {
+                                int x2 = (i * z->img_comp[n].h + x);
+                                int y2 = (j * z->img_comp[n].v + y);
+                                short* data =
+                                    z->img_comp[n].coeff +
+                                    64 * (x2 + y2 * z->img_comp[n].coeff_w);
+                                if (!stbi__jpeg_decode_block_prog_dc(
+                                        z, data, &z->huff_dc[z->img_comp[n].hd],
+                                        n))
+                                    return 0;
+                            }
+                        }
+                    }
+                    // after all interleaved components, that's an interleaved
+                    // MCU, so now count down the restart interval
+                    if (--z->todo <= 0) {
+                        if (z->code_bits < 24)
+                            stbi__grow_buffer_unsafe(z);
+                        if (!STBI__RESTART(z->marker))
+                            return 1;
+                        stbi__jpeg_reset(z);
+                    }
+                }
+            }
+            return 1;
+        }
+    }
+}
+
+static void stbi__jpeg_dequantize(short* data, stbi__uint16* dequant)
+{
+    int i;
+    for (i = 0; i < 64; ++i)
+        data[i] *= dequant[i];
+}
+
+static void stbi__jpeg_finish(stbi__jpeg* z)
+{
+    if (z->progressive) {
+        // dequantize and idct the data
+        int i, j, n;
+        for (n = 0; n < z->s->img_n; ++n) {
+            int w = (z->img_comp[n].x + 7) >> 3;
+            int h = (z->img_comp[n].y + 7) >> 3;
+            for (j = 0; j < h; ++j) {
+                for (i = 0; i < w; ++i) {
+                    short* data = z->img_comp[n].coeff +
+                                  64 * (i + j * z->img_comp[n].coeff_w);
+                    stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
+                    z->idct_block_kernel(z->img_comp[n].data +
+                                             z->img_comp[n].w2 * j * 8 + i * 8,
+                                         z->img_comp[n].w2, data);
+                }
+            }
+        }
+    }
+}
+
+static int stbi__process_marker(stbi__jpeg* z, int m)
+{
+    int L;
+    switch (m) {
+    case STBI__MARKER_none: // no marker found
+        return stbi__err("expected marker", "Corrupt JPEG");
+
+    case 0xDD: // DRI - specify restart interval
+        if (stbi__get16be(z->s) != 4)
+            return stbi__err("bad DRI len", "Corrupt JPEG");
+        z->restart_interval = stbi__get16be(z->s);
+        return 1;
+
+    case 0xDB: // DQT - define quantization table
+        L = stbi__get16be(z->s) - 2;
+        while (L > 0) {
+            int q = stbi__get8(z->s);
+            int p = q >> 4, sixteen = (p != 0);
+            int t = q & 15, i;
+            if (p != 0 && p != 1)
+                return stbi__err("bad DQT type", "Corrupt JPEG");
+            if (t > 3)
+                return stbi__err("bad DQT table", "Corrupt JPEG");
+
+            for (i = 0; i < 64; ++i)
+                z->dequant[t][stbi__jpeg_dezigzag[i]] =
+                    (stbi__uint16)(sixteen ? stbi__get16be(z->s)
+                                           : stbi__get8(z->s));
+            L -= (sixteen ? 129 : 65);
+        }
+        return L == 0;
+
+    case 0xC4: // DHT - define huffman table
+        L = stbi__get16be(z->s) - 2;
+        while (L > 0) {
+            stbi_uc* v;
+            int sizes[16], i, n = 0;
+            int q = stbi__get8(z->s);
+            int tc = q >> 4;
+            int th = q & 15;
+            if (tc > 1 || th > 3)
+                return stbi__err("bad DHT header", "Corrupt JPEG");
+            for (i = 0; i < 16; ++i) {
+                sizes[i] = stbi__get8(z->s);
+                n += sizes[i];
+            }
+            L -= 17;
+            if (tc == 0) {
+                if (!stbi__build_huffman(z->huff_dc + th, sizes))
+                    return 0;
+                v = z->huff_dc[th].values;
+            }
+            else {
+                if (!stbi__build_huffman(z->huff_ac + th, sizes))
+                    return 0;
+                v = z->huff_ac[th].values;
+            }
+            for (i = 0; i < n; ++i)
+                v[i] = stbi__get8(z->s);
+            if (tc != 0)
+                stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
+            L -= n;
+        }
+        return L == 0;
+    }
+
+    // check for comment block or APP blocks
+    if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
+        L = stbi__get16be(z->s);
+        if (L < 2) {
+            if (m == 0xFE)
+                return stbi__err("bad COM len", "Corrupt JPEG");
+            else
+                return stbi__err("bad APP len", "Corrupt JPEG");
+        }
+        L -= 2;
+
+        if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
+            static const unsigned char tag[5] = {'J', 'F', 'I', 'F', '\0'};
+            int ok = 1;
+            int i;
+            for (i = 0; i < 5; ++i)
+                if (stbi__get8(z->s) != tag[i])
+                    ok = 0;
+            L -= 5;
+            if (ok)
+                z->jfif = 1;
+        }
+        else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
+            static const unsigned char tag[6] = {'A', 'd', 'o', 'b', 'e', '\0'};
+            int ok = 1;
+            int i;
+            for (i = 0; i < 6; ++i)
+                if (stbi__get8(z->s) != tag[i])
+                    ok = 0;
+            L -= 6;
+            if (ok) {
+                stbi__get8(z->s);                            // version
+                stbi__get16be(z->s);                         // flags0
+                stbi__get16be(z->s);                         // flags1
+                z->app14_color_transform = stbi__get8(z->s); // color transform
+                L -= 6;
+            }
+        }
+
+        stbi__skip(z->s, L);
+        return 1;
+    }
+
+    return stbi__err("unknown marker", "Corrupt JPEG");
+}
+
+// after we see SOS
+static int stbi__process_scan_header(stbi__jpeg* z)
+{
+    int i;
+    int Ls = stbi__get16be(z->s);
+    z->scan_n = stbi__get8(z->s);
+    if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int)z->s->img_n)
+        return stbi__err("bad SOS component count", "Corrupt JPEG");
+    if (Ls != 6 + 2 * z->scan_n)
+        return stbi__err("bad SOS len", "Corrupt JPEG");
+    for (i = 0; i < z->scan_n; ++i) {
+        int id = stbi__get8(z->s), which;
+        int q = stbi__get8(z->s);
+        for (which = 0; which < z->s->img_n; ++which)
+            if (z->img_comp[which].id == id)
+                break;
+        if (which == z->s->img_n)
+            return 0; // no match
+        z->img_comp[which].hd = q >> 4;
+        if (z->img_comp[which].hd > 3)
+            return stbi__err("bad DC huff", "Corrupt JPEG");
+        z->img_comp[which].ha = q & 15;
+        if (z->img_comp[which].ha > 3)
+            return stbi__err("bad AC huff", "Corrupt JPEG");
+        z->order[i] = which;
+    }
+
+    {
+        int aa;
+        z->spec_start = stbi__get8(z->s);
+        z->spec_end = stbi__get8(z->s); // should be 63, but might be 0
+        aa = stbi__get8(z->s);
+        z->succ_high = (aa >> 4);
+        z->succ_low = (aa & 15);
+        if (z->progressive) {
+            if (z->spec_start > 63 || z->spec_end > 63 ||
+                z->spec_start > z->spec_end || z->succ_high > 13 ||
+                z->succ_low > 13)
+                return stbi__err("bad SOS", "Corrupt JPEG");
+        }
+        else {
+            if (z->spec_start != 0)
+                return stbi__err("bad SOS", "Corrupt JPEG");
+            if (z->succ_high != 0 || z->succ_low != 0)
+                return stbi__err("bad SOS", "Corrupt JPEG");
+            z->spec_end = 63;
+        }
+    }
+
+    return 1;
+}
+
+static int stbi__free_jpeg_components(stbi__jpeg* z, int ncomp, int why)
+{
+    int i;
+    for (i = 0; i < ncomp; ++i) {
+        if (z->img_comp[i].raw_data) {
+            STBI_FREE(z->img_comp[i].raw_data);
+            z->img_comp[i].raw_data = NULL;
+            z->img_comp[i].data = NULL;
+        }
+        if (z->img_comp[i].raw_coeff) {
+            STBI_FREE(z->img_comp[i].raw_coeff);
+            z->img_comp[i].raw_coeff = 0;
+            z->img_comp[i].coeff = 0;
+        }
+        if (z->img_comp[i].linebuf) {
+            STBI_FREE(z->img_comp[i].linebuf);
+            z->img_comp[i].linebuf = NULL;
+        }
+    }
+    return why;
+}
+
+static int stbi__process_frame_header(stbi__jpeg* z, int scan)
+{
+    stbi__context* s = z->s;
+    int Lf, p, i, q, h_max = 1, v_max = 1, c;
+    Lf = stbi__get16be(s);
+    if (Lf < 11)
+        return stbi__err("bad SOF len", "Corrupt JPEG"); // JPEG
+    p = stbi__get8(s);
+    if (p != 8)
+        return stbi__err(
+            "only 8-bit",
+            "JPEG format not supported: 8-bit only"); // JPEG baseline
+    s->img_y = stbi__get16be(s);
+    if (s->img_y == 0)
+        return stbi__err(
+            "no header height",
+            "JPEG format not supported: delayed height"); // Legal, but we don't
+                                                          // handle it--but
+                                                          // neither does IJG
+    s->img_x = stbi__get16be(s);
+    if (s->img_x == 0)
+        return stbi__err("0 width", "Corrupt JPEG"); // JPEG requires
+    c = stbi__get8(s);
+    if (c != 3 && c != 1 && c != 4)
+        return stbi__err("bad component count", "Corrupt JPEG");
+    s->img_n = c;
+    for (i = 0; i < c; ++i) {
+        z->img_comp[i].data = NULL;
+        z->img_comp[i].linebuf = NULL;
+    }
+
+    if (Lf != 8 + 3 * s->img_n)
+        return stbi__err("bad SOF len", "Corrupt JPEG");
+
+    z->rgb = 0;
+    for (i = 0; i < s->img_n; ++i) {
+        static const unsigned char rgb[3] = {'R', 'G', 'B'};
+        z->img_comp[i].id = stbi__get8(s);
+        if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
+            ++z->rgb;
+        q = stbi__get8(s);
+        z->img_comp[i].h = (q >> 4);
+        if (!z->img_comp[i].h || z->img_comp[i].h > 4)
+            return stbi__err("bad H", "Corrupt JPEG");
+        z->img_comp[i].v = q & 15;
+        if (!z->img_comp[i].v || z->img_comp[i].v > 4)
+            return stbi__err("bad V", "Corrupt JPEG");
+        z->img_comp[i].tq = stbi__get8(s);
+        if (z->img_comp[i].tq > 3)
+            return stbi__err("bad TQ", "Corrupt JPEG");
+    }
+
+    if (scan != STBI__SCAN_load)
+        return 1;
+
+    if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0))
+        return stbi__err("too large", "Image too large to decode");
+
+    for (i = 0; i < s->img_n; ++i) {
+        if (z->img_comp[i].h > h_max)
+            h_max = z->img_comp[i].h;
+        if (z->img_comp[i].v > v_max)
+            v_max = z->img_comp[i].v;
+    }
+
+    // compute interleaved mcu info
+    z->img_h_max = h_max;
+    z->img_v_max = v_max;
+    z->img_mcu_w = h_max * 8;
+    z->img_mcu_h = v_max * 8;
+    // these sizes can't be more than 17 bits
+    z->img_mcu_x = (s->img_x + z->img_mcu_w - 1) / z->img_mcu_w;
+    z->img_mcu_y = (s->img_y + z->img_mcu_h - 1) / z->img_mcu_h;
+
+    for (i = 0; i < s->img_n; ++i) {
+        // number of effective pixels (e.g. for non-interleaved MCU)
+        z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max - 1) / h_max;
+        z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max - 1) / v_max;
+        // to simplify generation, we'll allocate enough memory to decode
+        // the bogus oversized data from using interleaved MCUs and their
+        // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
+        // discard the extra data until colorspace conversion
+        //
+        // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked
+        // earlier) so these muls can't overflow with 32-bit ints (which we
+        // require)
+        z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
+        z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
+        z->img_comp[i].coeff = 0;
+        z->img_comp[i].raw_coeff = 0;
+        z->img_comp[i].linebuf = NULL;
+        z->img_comp[i].raw_data =
+            stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
+        if (z->img_comp[i].raw_data == NULL)
+            return stbi__free_jpeg_components(
+                z, i + 1, stbi__err("outofmem", "Out of memory"));
+        // align blocks for idct using mmx/sse
+        z->img_comp[i].data =
+            (stbi_uc*)(((size_t)z->img_comp[i].raw_data + 15) & ~15);
+        if (z->progressive) {
+            // w2, h2 are multiples of 8 (see above)
+            z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
+            z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
+            z->img_comp[i].raw_coeff = stbi__malloc_mad3(
+                z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
+            if (z->img_comp[i].raw_coeff == NULL)
+                return stbi__free_jpeg_components(
+                    z, i + 1, stbi__err("outofmem", "Out of memory"));
+            z->img_comp[i].coeff =
+                (short*)(((size_t)z->img_comp[i].raw_coeff + 15) & ~15);
+        }
+    }
+
+    return 1;
+}
+
+// use comparisons since in some cases we handle more than one case (e.g. SOF)
+#define stbi__DNL(x) ((x) == 0xdc)
+#define stbi__SOI(x) ((x) == 0xd8)
+#define stbi__EOI(x) ((x) == 0xd9)
+#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
+#define stbi__SOS(x) ((x) == 0xda)
+
+#define stbi__SOF_progressive(x) ((x) == 0xc2)
+
+static int stbi__decode_jpeg_header(stbi__jpeg* z, int scan)
+{
+    int m;
+    z->jfif = 0;
+    z->app14_color_transform = -1; // valid values are 0,1,2
+    z->marker = STBI__MARKER_none; // initialize cached marker to empty
+    m = stbi__get_marker(z);
+    if (!stbi__SOI(m))
+        return stbi__err("no SOI", "Corrupt JPEG");
+    if (scan == STBI__SCAN_type)
+        return 1;
+    m = stbi__get_marker(z);
+    while (!stbi__SOF(m)) {
+        if (!stbi__process_marker(z, m))
+            return 0;
+        m = stbi__get_marker(z);
+        while (m == STBI__MARKER_none) {
+            // some files have extra padding after their blocks, so ok, we'll
+            // scan
+            if (stbi__at_eof(z->s))
+                return stbi__err("no SOF", "Corrupt JPEG");
+            m = stbi__get_marker(z);
+        }
+    }
+    z->progressive = stbi__SOF_progressive(m);
+    if (!stbi__process_frame_header(z, scan))
+        return 0;
+    return 1;
+}
+
+// decode image to YCbCr format
+static int stbi__decode_jpeg_image(stbi__jpeg* j)
+{
+    int m;
+    for (m = 0; m < 4; m++) {
+        j->img_comp[m].raw_data = NULL;
+        j->img_comp[m].raw_coeff = NULL;
+    }
+    j->restart_interval = 0;
+    if (!stbi__decode_jpeg_header(j, STBI__SCAN_load))
+        return 0;
+    m = stbi__get_marker(j);
+    while (!stbi__EOI(m)) {
+        if (stbi__SOS(m)) {
+            if (!stbi__process_scan_header(j))
+                return 0;
+            if (!stbi__parse_entropy_coded_data(j))
+                return 0;
+            if (j->marker == STBI__MARKER_none) {
+                // handle 0s at the end of image data from IP Kamera 9060
+                while (!stbi__at_eof(j->s)) {
+                    int x = stbi__get8(j->s);
+                    if (x == 255) {
+                        j->marker = stbi__get8(j->s);
+                        break;
+                    }
+                }
+                // if we reach eof without hitting a marker, stbi__get_marker()
+                // below will fail and we'll eventually return 0
+            }
+        }
+        else if (stbi__DNL(m)) {
+            int Ld = stbi__get16be(j->s);
+            stbi__uint32 NL = stbi__get16be(j->s);
+            if (Ld != 4)
+                return stbi__err("bad DNL len", "Corrupt JPEG");
+            if (NL != j->s->img_y)
+                return stbi__err("bad DNL height", "Corrupt JPEG");
+        }
+        else {
+            if (!stbi__process_marker(j, m))
+                return 0;
+        }
+        m = stbi__get_marker(j);
+    }
+    if (j->progressive)
+        stbi__jpeg_finish(j);
+    return 1;
+}
+
+// static jfif-centered resampling (across block boundaries)
+
+typedef stbi_uc* (*resample_row_func)(stbi_uc* out, stbi_uc* in0, stbi_uc* in1,
+                                      int w, int hs);
+
+#define stbi__div4(x) ((stbi_uc)((x) >> 2))
+
+static stbi_uc* resample_row_1(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far,
+                               int w, int hs)
+{
+    STBI_NOTUSED(out);
+    STBI_NOTUSED(in_far);
+    STBI_NOTUSED(w);
+    STBI_NOTUSED(hs);
+    return in_near;
+}
+
+static stbi_uc* stbi__resample_row_v_2(stbi_uc* out, stbi_uc* in_near,
+                                       stbi_uc* in_far, int w, int hs)
+{
+    // need to generate two samples vertically for every one in input
+    int i;
+    STBI_NOTUSED(hs);
+    for (i = 0; i < w; ++i)
+        out[i] = stbi__div4(3 * in_near[i] + in_far[i] + 2);
+    return out;
+}
+
+static stbi_uc* stbi__resample_row_h_2(stbi_uc* out, stbi_uc* in_near,
+                                       stbi_uc* in_far, int w, int hs)
+{
+    // need to generate two samples horizontally for every one in input
+    int i;
+    stbi_uc* input = in_near;
+
+    if (w == 1) {
+        // if only one sample, can't do any interpolation
+        out[0] = out[1] = input[0];
+        return out;
+    }
+
+    out[0] = input[0];
+    out[1] = stbi__div4(input[0] * 3 + input[1] + 2);
+    for (i = 1; i < w - 1; ++i) {
+        int n = 3 * input[i] + 2;
+        out[i * 2 + 0] = stbi__div4(n + input[i - 1]);
+        out[i * 2 + 1] = stbi__div4(n + input[i + 1]);
+    }
+    out[i * 2 + 0] = stbi__div4(input[w - 2] * 3 + input[w - 1] + 2);
+    out[i * 2 + 1] = input[w - 1];
+
+    STBI_NOTUSED(in_far);
+    STBI_NOTUSED(hs);
+
+    return out;
+}
+
+#define stbi__div16(x) ((stbi_uc)((x) >> 4))
+
+static stbi_uc* stbi__resample_row_hv_2(stbi_uc* out, stbi_uc* in_near,
+                                        stbi_uc* in_far, int w, int hs)
+{
+    // need to generate 2x2 samples for every one in input
+    int i, t0, t1;
+    if (w == 1) {
+        out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2);
+        return out;
+    }
+
+    t1 = 3 * in_near[0] + in_far[0];
+    out[0] = stbi__div4(t1 + 2);
+    for (i = 1; i < w; ++i) {
+        t0 = t1;
+        t1 = 3 * in_near[i] + in_far[i];
+        out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8);
+        out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
+    }
+    out[w * 2 - 1] = stbi__div4(t1 + 2);
+
+    STBI_NOTUSED(hs);
+
+    return out;
+}
+
+#if defined(STBI_SSE2) || defined(STBI_NEON)
+static stbi_uc* stbi__resample_row_hv_2_simd(stbi_uc* out, stbi_uc* in_near,
+                                             stbi_uc* in_far, int w, int hs)
+{
+    // need to generate 2x2 samples for every one in input
+    int i = 0, t0, t1;
+
+    if (w == 1) {
+        out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2);
+        return out;
+    }
+
+    t1 = 3 * in_near[0] + in_far[0];
+    // process groups of 8 pixels for as long as we can.
+    // note we can't handle the last pixel in a row in this loop
+    // because we need to handle the filter boundary conditions.
+    for (; i < ((w - 1) & ~7); i += 8) {
+#if defined(STBI_SSE2)
+        // load and perform the vertical filtering pass
+        // this uses 3*x + y = 4*x + (y - x)
+        __m128i zero = _mm_setzero_si128();
+        __m128i farb = _mm_loadl_epi64((__m128i*)(in_far + i));
+        __m128i nearb = _mm_loadl_epi64((__m128i*)(in_near + i));
+        __m128i farw = _mm_unpacklo_epi8(farb, zero);
+        __m128i nearw = _mm_unpacklo_epi8(nearb, zero);
+        __m128i diff = _mm_sub_epi16(farw, nearw);
+        __m128i nears = _mm_slli_epi16(nearw, 2);
+        __m128i curr = _mm_add_epi16(nears, diff); // current row
+
+        // horizontal filter works the same based on shifted vers of current
+        // row. "prev" is current row shifted right by 1 pixel; we need to
+        // insert the previous pixel value (from t1).
+        // "next" is current row shifted left by 1 pixel, with first pixel
+        // of next block of 8 pixels added in.
+        __m128i prv0 = _mm_slli_si128(curr, 2);
+        __m128i nxt0 = _mm_srli_si128(curr, 2);
+        __m128i prev = _mm_insert_epi16(prv0, t1, 0);
+        __m128i next =
+            _mm_insert_epi16(nxt0, 3 * in_near[i + 8] + in_far[i + 8], 7);
+
+        // horizontal filter, polyphase implementation since it's convenient:
+        // even pixels = 3*cur + prev = cur*4 + (prev - cur)
+        // odd  pixels = 3*cur + next = cur*4 + (next - cur)
+        // note the shared term.
+        __m128i bias = _mm_set1_epi16(8);
+        __m128i curs = _mm_slli_epi16(curr, 2);
+        __m128i prvd = _mm_sub_epi16(prev, curr);
+        __m128i nxtd = _mm_sub_epi16(next, curr);
+        __m128i curb = _mm_add_epi16(curs, bias);
+        __m128i even = _mm_add_epi16(prvd, curb);
+        __m128i odd = _mm_add_epi16(nxtd, curb);
+
+        // interleave even and odd pixels, then undo scaling.
+        __m128i int0 = _mm_unpacklo_epi16(even, odd);
+        __m128i int1 = _mm_unpackhi_epi16(even, odd);
+        __m128i de0 = _mm_srli_epi16(int0, 4);
+        __m128i de1 = _mm_srli_epi16(int1, 4);
+
+        // pack and write output
+        __m128i outv = _mm_packus_epi16(de0, de1);
+        _mm_storeu_si128((__m128i*)(out + i * 2), outv);
+#elif defined(STBI_NEON)
+        // load and perform the vertical filtering pass
+        // this uses 3*x + y = 4*x + (y - x)
+        uint8x8_t farb = vld1_u8(in_far + i);
+        uint8x8_t nearb = vld1_u8(in_near + i);
+        int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
+        int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
+        int16x8_t curr = vaddq_s16(nears, diff); // current row
+
+        // horizontal filter works the same based on shifted vers of current
+        // row. "prev" is current row shifted right by 1 pixel; we need to
+        // insert the previous pixel value (from t1).
+        // "next" is current row shifted left by 1 pixel, with first pixel
+        // of next block of 8 pixels added in.
+        int16x8_t prv0 = vextq_s16(curr, curr, 7);
+        int16x8_t nxt0 = vextq_s16(curr, curr, 1);
+        int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
+        int16x8_t next =
+            vsetq_lane_s16(3 * in_near[i + 8] + in_far[i + 8], nxt0, 7);
+
+        // horizontal filter, polyphase implementation since it's convenient:
+        // even pixels = 3*cur + prev = cur*4 + (prev - cur)
+        // odd  pixels = 3*cur + next = cur*4 + (next - cur)
+        // note the shared term.
+        int16x8_t curs = vshlq_n_s16(curr, 2);
+        int16x8_t prvd = vsubq_s16(prev, curr);
+        int16x8_t nxtd = vsubq_s16(next, curr);
+        int16x8_t even = vaddq_s16(curs, prvd);
+        int16x8_t odd = vaddq_s16(curs, nxtd);
+
+        // undo scaling and round, then store with even/odd phases interleaved
+        uint8x8x2_t o;
+        o.val[0] = vqrshrun_n_s16(even, 4);
+        o.val[1] = vqrshrun_n_s16(odd, 4);
+        vst2_u8(out + i * 2, o);
+#endif
+
+        // "previous" value for next iter
+        t1 = 3 * in_near[i + 7] + in_far[i + 7];
+    }
+
+    t0 = t1;
+    t1 = 3 * in_near[i] + in_far[i];
+    out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
+
+    for (++i; i < w; ++i) {
+        t0 = t1;
+        t1 = 3 * in_near[i] + in_far[i];
+        out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8);
+        out[i * 2] = stbi__div16(3 * t1 + t0 + 8);
+    }
+    out[w * 2 - 1] = stbi__div4(t1 + 2);
+
+    STBI_NOTUSED(hs);
+
+    return out;
+}
+#endif
+
+static stbi_uc* stbi__resample_row_generic(stbi_uc* out, stbi_uc* in_near,
+                                           stbi_uc* in_far, int w, int hs)
+{
+    // resample with nearest-neighbor
+    int i, j;
+    STBI_NOTUSED(in_far);
+    for (i = 0; i < w; ++i)
+        for (j = 0; j < hs; ++j)
+            out[i * hs + j] = in_near[i];
+    return out;
+}
+
+// this is a reduced-precision calculation of YCbCr-to-RGB introduced
+// to make sure the code produces the same results in both SIMD and scalar
+#define stbi__float2fixed(x) (((int)((x)*4096.0f + 0.5f)) << 8)
+static void stbi__YCbCr_to_RGB_row(stbi_uc* out, const stbi_uc* y,
+                                   const stbi_uc* pcb, const stbi_uc* pcr,
+                                   int count, int step)
+{
+    int i;
+    for (i = 0; i < count; ++i) {
+        int y_fixed = (y[i] << 20) + (1 << 19); // rounding
+        int r, g, b;
+        int cr = pcr[i] - 128;
+        int cb = pcb[i] - 128;
+        r = y_fixed + cr * stbi__float2fixed(1.40200f);
+        g = y_fixed + (cr * -stbi__float2fixed(0.71414f)) +
+            ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000);
+        b = y_fixed + cb * stbi__float2fixed(1.77200f);
+        r >>= 20;
+        g >>= 20;
+        b >>= 20;
+        if ((unsigned)r > 255) {
+            if (r < 0)
+                r = 0;
+            else
+                r = 255;
+        }
+        if ((unsigned)g > 255) {
+            if (g < 0)
+                g = 0;
+            else
+                g = 255;
+        }
+        if ((unsigned)b > 255) {
+            if (b < 0)
+                b = 0;
+            else
+                b = 255;
+        }
+        out[0] = (stbi_uc)r;
+        out[1] = (stbi_uc)g;
+        out[2] = (stbi_uc)b;
+        out[3] = 255;
+        out += step;
+    }
+}
+
+#if defined(STBI_SSE2) || defined(STBI_NEON)
+static void stbi__YCbCr_to_RGB_simd(stbi_uc* out, stbi_uc const* y,
+                                    stbi_uc const* pcb, stbi_uc const* pcr,
+                                    int count, int step)
+{
+    int i = 0;
+
+#ifdef STBI_SSE2
+    // step == 3 is pretty ugly on the final interleave, and i'm not convinced
+    // it's useful in practice (you wouldn't use it for textures, for example).
+    // so just accelerate step == 4 case.
+    if (step == 4) {
+        // this is a fairly straightforward implementation and not
+        // super-optimized.
+        __m128i signflip = _mm_set1_epi8(-0x80);
+        __m128i cr_const0 = _mm_set1_epi16((short)(1.40200f * 4096.0f + 0.5f));
+        __m128i cr_const1 = _mm_set1_epi16(-(short)(0.71414f * 4096.0f + 0.5f));
+        __m128i cb_const0 = _mm_set1_epi16(-(short)(0.34414f * 4096.0f + 0.5f));
+        __m128i cb_const1 = _mm_set1_epi16((short)(1.77200f * 4096.0f + 0.5f));
+        __m128i y_bias = _mm_set1_epi8((char)(unsigned char)128);
+        __m128i xw = _mm_set1_epi16(255); // alpha channel
+
+        for (; i + 7 < count; i += 8) {
+            // load
+            __m128i y_bytes = _mm_loadl_epi64((__m128i*)(y + i));
+            __m128i cr_bytes = _mm_loadl_epi64((__m128i*)(pcr + i));
+            __m128i cb_bytes = _mm_loadl_epi64((__m128i*)(pcb + i));
+            __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
+            __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
+
+            // unpack to short (and left-shift cr, cb by 8)
+            __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes);
+            __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
+            __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
+
+            // color transform
+            __m128i yws = _mm_srli_epi16(yw, 4);
+            __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
+            __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
+            __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
+            __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
+            __m128i rws = _mm_add_epi16(cr0, yws);
+            __m128i gwt = _mm_add_epi16(cb0, yws);
+            __m128i bws = _mm_add_epi16(yws, cb1);
+            __m128i gws = _mm_add_epi16(gwt, cr1);
+
+            // descale
+            __m128i rw = _mm_srai_epi16(rws, 4);
+            __m128i bw = _mm_srai_epi16(bws, 4);
+            __m128i gw = _mm_srai_epi16(gws, 4);
+
+            // back to byte, set up for transpose
+            __m128i brb = _mm_packus_epi16(rw, bw);
+            __m128i gxb = _mm_packus_epi16(gw, xw);
+
+            // transpose to interleave channels
+            __m128i t0 = _mm_unpacklo_epi8(brb, gxb);
+            __m128i t1 = _mm_unpackhi_epi8(brb, gxb);
+            __m128i o0 = _mm_unpacklo_epi16(t0, t1);
+            __m128i o1 = _mm_unpackhi_epi16(t0, t1);
+
+            // store
+            _mm_storeu_si128((__m128i*)(out + 0), o0);
+            _mm_storeu_si128((__m128i*)(out + 16), o1);
+            out += 32;
+        }
+    }
+#endif
+
+#ifdef STBI_NEON
+    // in this version, step=3 support would be easy to add. but is there
+    // demand?
+    if (step == 4) {
+        // this is a fairly straightforward implementation and not
+        // super-optimized.
+        uint8x8_t signflip = vdup_n_u8(0x80);
+        int16x8_t cr_const0 = vdupq_n_s16((short)(1.40200f * 4096.0f + 0.5f));
+        int16x8_t cr_const1 = vdupq_n_s16(-(short)(0.71414f * 4096.0f + 0.5f));
+        int16x8_t cb_const0 = vdupq_n_s16(-(short)(0.34414f * 4096.0f + 0.5f));
+        int16x8_t cb_const1 = vdupq_n_s16((short)(1.77200f * 4096.0f + 0.5f));
+
+        for (; i + 7 < count; i += 8) {
+            // load
+            uint8x8_t y_bytes = vld1_u8(y + i);
+            uint8x8_t cr_bytes = vld1_u8(pcr + i);
+            uint8x8_t cb_bytes = vld1_u8(pcb + i);
+            int8x8_t cr_biased =
+                vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
+            int8x8_t cb_biased =
+                vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
+
+            // expand to s16
+            int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
+            int16x8_t crw = vshll_n_s8(cr_biased, 7);
+            int16x8_t cbw = vshll_n_s8(cb_biased, 7);
+
+            // color transform
+            int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
+            int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
+            int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
+            int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
+            int16x8_t rws = vaddq_s16(yws, cr0);
+            int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
+            int16x8_t bws = vaddq_s16(yws, cb1);
+
+            // undo scaling, round, convert to byte
+            uint8x8x4_t o;
+            o.val[0] = vqrshrun_n_s16(rws, 4);
+            o.val[1] = vqrshrun_n_s16(gws, 4);
+            o.val[2] = vqrshrun_n_s16(bws, 4);
+            o.val[3] = vdup_n_u8(255);
+
+            // store, interleaving r/g/b/a
+            vst4_u8(out, o);
+            out += 8 * 4;
+        }
+    }
+#endif
+
+    for (; i < count; ++i) {
+        int y_fixed = (y[i] << 20) + (1 << 19); // rounding
+        int r, g, b;
+        int cr = pcr[i] - 128;
+        int cb = pcb[i] - 128;
+        r = y_fixed + cr * stbi__float2fixed(1.40200f);
+        g = y_fixed + cr * -stbi__float2fixed(0.71414f) +
+            ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000);
+        b = y_fixed + cb * stbi__float2fixed(1.77200f);
+        r >>= 20;
+        g >>= 20;
+        b >>= 20;
+        if ((unsigned)r > 255) {
+            if (r < 0)
+                r = 0;
+            else
+                r = 255;
+        }
+        if ((unsigned)g > 255) {
+            if (g < 0)
+                g = 0;
+            else
+                g = 255;
+        }
+        if ((unsigned)b > 255) {
+            if (b < 0)
+                b = 0;
+            else
+                b = 255;
+        }
+        out[0] = (stbi_uc)r;
+        out[1] = (stbi_uc)g;
+        out[2] = (stbi_uc)b;
+        out[3] = 255;
+        out += step;
+    }
+}
+#endif
+
+// set up the kernels
+static void stbi__setup_jpeg(stbi__jpeg* j)
+{
+    j->idct_block_kernel = stbi__idct_block;
+    j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
+    j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
+
+#ifdef STBI_SSE2
+    if (stbi__sse2_available()) {
+        j->idct_block_kernel = stbi__idct_simd;
+        j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
+        j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
+    }
+#endif
+
+#ifdef STBI_NEON
+    j->idct_block_kernel = stbi__idct_simd;
+    j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
+    j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
+#endif
+}
+
+// clean up the temporary component buffers
+static void stbi__cleanup_jpeg(stbi__jpeg* j)
+{
+    stbi__free_jpeg_components(j, j->s->img_n, 0);
+}
+
+typedef struct {
+    resample_row_func resample;
+    stbi_uc *line0, *line1;
+    int hs, vs;  // expansion factor in each axis
+    int w_lores; // horizontal pixels pre-expansion
+    int ystep;   // how far through vertical expansion we are
+    int ypos;    // which pre-expansion row we're on
+} stbi__resample;
+
+// fast 0..255 * 0..255 => 0..255 rounded multiplication
+static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y)
+{
+    unsigned int t = x * y + 128;
+    return (stbi_uc)((t + (t >> 8)) >> 8);
+}
+
+static stbi_uc* load_jpeg_image(stbi__jpeg* z, int* out_x, int* out_y,
+                                int* comp, int req_comp)
+{
+    int n, decode_n, is_rgb;
+    z->s->img_n = 0; // make stbi__cleanup_jpeg safe
+
+    // validate req_comp
+    if (req_comp < 0 || req_comp > 4)
+        return stbi__errpuc("bad req_comp", "Internal error");
+
+    // load a jpeg image from whichever source, but leave in YCbCr format
+    if (!stbi__decode_jpeg_image(z)) {
+        stbi__cleanup_jpeg(z);
+        return NULL;
+    }
+
+    // determine actual number of components to generate
+    n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
+
+    is_rgb = z->s->img_n == 3 &&
+             (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
+
+    if (z->s->img_n == 3 && n < 3 && !is_rgb)
+        decode_n = 1;
+    else
+        decode_n = z->s->img_n;
+
+    // resample and color-convert
+    {
+        int k;
+        unsigned int i, j;
+        stbi_uc* output;
+        stbi_uc* coutput[4];
+
+        stbi__resample res_comp[4];
+
+        for (k = 0; k < decode_n; ++k) {
+            stbi__resample* r = &res_comp[k];
+
+            // allocate line buffer big enough for upsampling off the edges
+            // with upsample factor of 4
+            z->img_comp[k].linebuf = (stbi_uc*)stbi__malloc(z->s->img_x + 3);
+            if (!z->img_comp[k].linebuf) {
+                stbi__cleanup_jpeg(z);
+                return stbi__errpuc("outofmem", "Out of memory");
+            }
+
+            r->hs = z->img_h_max / z->img_comp[k].h;
+            r->vs = z->img_v_max / z->img_comp[k].v;
+            r->ystep = r->vs >> 1;
+            r->w_lores = (z->s->img_x + r->hs - 1) / r->hs;
+            r->ypos = 0;
+            r->line0 = r->line1 = z->img_comp[k].data;
+
+            if (r->hs == 1 && r->vs == 1)
+                r->resample = resample_row_1;
+            else if (r->hs == 1 && r->vs == 2)
+                r->resample = stbi__resample_row_v_2;
+            else if (r->hs == 2 && r->vs == 1)
+                r->resample = stbi__resample_row_h_2;
+            else if (r->hs == 2 && r->vs == 2)
+                r->resample = z->resample_row_hv_2_kernel;
+            else
+                r->resample = stbi__resample_row_generic;
+        }
+
+        // can't error after this so, this is safe
+        output = (stbi_uc*)stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
+        if (!output) {
+            stbi__cleanup_jpeg(z);
+            return stbi__errpuc("outofmem", "Out of memory");
+        }
+
+        // now go ahead and resample
+        for (j = 0; j < z->s->img_y; ++j) {
+            stbi_uc* out = output + n * z->s->img_x * j;
+            for (k = 0; k < decode_n; ++k) {
+                stbi__resample* r = &res_comp[k];
+                int y_bot = r->ystep >= (r->vs >> 1);
+                coutput[k] = r->resample(
+                    z->img_comp[k].linebuf, y_bot ? r->line1 : r->line0,
+                    y_bot ? r->line0 : r->line1, r->w_lores, r->hs);
+                if (++r->ystep >= r->vs) {
+                    r->ystep = 0;
+                    r->line0 = r->line1;
+                    if (++r->ypos < z->img_comp[k].y)
+                        r->line1 += z->img_comp[k].w2;
+                }
+            }
+            if (n >= 3) {
+                stbi_uc* y = coutput[0];
+                if (z->s->img_n == 3) {
+                    if (is_rgb) {
+                        for (i = 0; i < z->s->img_x; ++i) {
+                            out[0] = y[i];
+                            out[1] = coutput[1][i];
+                            out[2] = coutput[2][i];
+                            out[3] = 255;
+                            out += n;
+                        }
+                    }
+                    else {
+                        z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2],
+                                               z->s->img_x, n);
+                    }
+                }
+                else if (z->s->img_n == 4) {
+                    if (z->app14_color_transform == 0) { // CMYK
+                        for (i = 0; i < z->s->img_x; ++i) {
+                            stbi_uc m = coutput[3][i];
+                            out[0] = stbi__blinn_8x8(coutput[0][i], m);
+                            out[1] = stbi__blinn_8x8(coutput[1][i], m);
+                            out[2] = stbi__blinn_8x8(coutput[2][i], m);
+                            out[3] = 255;
+                            out += n;
+                        }
+                    }
+                    else if (z->app14_color_transform == 2) { // YCCK
+                        z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2],
+                                               z->s->img_x, n);
+                        for (i = 0; i < z->s->img_x; ++i) {
+                            stbi_uc m = coutput[3][i];
+                            out[0] = stbi__blinn_8x8(255 - out[0], m);
+                            out[1] = stbi__blinn_8x8(255 - out[1], m);
+                            out[2] = stbi__blinn_8x8(255 - out[2], m);
+                            out += n;
+                        }
+                    }
+                    else { // YCbCr + alpha?  Ignore the fourth channel for now
+                        z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2],
+                                               z->s->img_x, n);
+                    }
+                }
+                else
+                    for (i = 0; i < z->s->img_x; ++i) {
+                        out[0] = out[1] = out[2] = y[i];
+                        out[3] = 255; // not used if n==3
+                        out += n;
+                    }
+            }
+            else {
+                if (is_rgb) {
+                    if (n == 1)
+                        for (i = 0; i < z->s->img_x; ++i)
+                            *out++ = stbi__compute_y(
+                                coutput[0][i], coutput[1][i], coutput[2][i]);
+                    else {
+                        for (i = 0; i < z->s->img_x; ++i, out += 2) {
+                            out[0] = stbi__compute_y(
+                                coutput[0][i], coutput[1][i], coutput[2][i]);
+                            out[1] = 255;
+                        }
+                    }
+                }
+                else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
+                    for (i = 0; i < z->s->img_x; ++i) {
+                        stbi_uc m = coutput[3][i];
+                        stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
+                        stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
+                        stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
+                        out[0] = stbi__compute_y(r, g, b);
+                        out[1] = 255;
+                        out += n;
+                    }
+                }
+                else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
+                    for (i = 0; i < z->s->img_x; ++i) {
+                        out[0] =
+                            stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
+                        out[1] = 255;
+                        out += n;
+                    }
+                }
+                else {
+                    stbi_uc* y = coutput[0];
+                    if (n == 1)
+                        for (i = 0; i < z->s->img_x; ++i)
+                            out[i] = y[i];
+                    else
+                        for (i = 0; i < z->s->img_x; ++i) {
+                            *out++ = y[i];
+                            *out++ = 255;
+                        }
+                }
+            }
+        }
+        stbi__cleanup_jpeg(z);
+        *out_x = z->s->img_x;
+        *out_y = z->s->img_y;
+        if (comp)
+            *comp = z->s->img_n >= 3
+                        ? 3
+                        : 1; // report original components, not output
+        return output;
+    }
+}
+
+static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp,
+                             int req_comp, stbi__result_info* ri)
+{
+    unsigned char* result;
+    stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
+    STBI_NOTUSED(ri);
+    j->s = s;
+    stbi__setup_jpeg(j);
+    result = load_jpeg_image(j, x, y, comp, req_comp);
+    STBI_FREE(j);
+    return result;
+}
+
+static int stbi__jpeg_test(stbi__context* s)
+{
+    int r;
+    stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
+    j->s = s;
+    stbi__setup_jpeg(j);
+    r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
+    stbi__rewind(s);
+    STBI_FREE(j);
+    return r;
+}
+
+static int stbi__jpeg_info_raw(stbi__jpeg* j, int* x, int* y, int* comp)
+{
+    if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
+        stbi__rewind(j->s);
+        return 0;
+    }
+    if (x)
+        *x = j->s->img_x;
+    if (y)
+        *y = j->s->img_y;
+    if (comp)
+        *comp = j->s->img_n >= 3 ? 3 : 1;
+    return 1;
+}
+
+static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    int result;
+    stbi__jpeg* j = (stbi__jpeg*)(stbi__malloc(sizeof(stbi__jpeg)));
+    j->s = s;
+    result = stbi__jpeg_info_raw(j, x, y, comp);
+    STBI_FREE(j);
+    return result;
+}
+#endif
+
+// public domain zlib decode    v0.2  Sean Barrett 2006-11-18
+//    simple implementation
+//      - all input must be provided in an upfront buffer
+//      - all output is written to a single output buffer (can malloc/realloc)
+//    performance
+//      - fast huffman
+
+#ifndef STBI_NO_ZLIB
+
+// fast-way is faster to check than jpeg huffman, but slow way is slower
+#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
+#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
+
+// zlib-style huffman encoding
+// (jpegs packs from left, zlib from right, so can't share code)
+typedef struct {
+    stbi__uint16 fast[1 << STBI__ZFAST_BITS];
+    stbi__uint16 firstcode[16];
+    int maxcode[17];
+    stbi__uint16 firstsymbol[16];
+    stbi_uc size[288];
+    stbi__uint16 value[288];
+} stbi__zhuffman;
+
+stbi_inline static int stbi__bitreverse16(int n)
+{
+    n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1);
+    n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2);
+    n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4);
+    n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8);
+    return n;
+}
+
+stbi_inline static int stbi__bit_reverse(int v, int bits)
+{
+    STBI_ASSERT(bits <= 16);
+    // to bit reverse n bits, reverse 16 and shift
+    // e.g. 11 bits, bit reverse and shift away 5
+    return stbi__bitreverse16(v) >> (16 - bits);
+}
+
+static int stbi__zbuild_huffman(stbi__zhuffman* z, const stbi_uc* sizelist,
+                                int num)
+{
+    int i, k = 0;
+    int code, next_code[16], sizes[17];
+
+    // DEFLATE spec for generating codes
+    memset(sizes, 0, sizeof(sizes));
+    memset(z->fast, 0, sizeof(z->fast));
+    for (i = 0; i < num; ++i)
+        ++sizes[sizelist[i]];
+    sizes[0] = 0;
+    for (i = 1; i < 16; ++i)
+        if (sizes[i] > (1 << i))
+            return stbi__err("bad sizes", "Corrupt PNG");
+    code = 0;
+    for (i = 1; i < 16; ++i) {
+        next_code[i] = code;
+        z->firstcode[i] = (stbi__uint16)code;
+        z->firstsymbol[i] = (stbi__uint16)k;
+        code = (code + sizes[i]);
+        if (sizes[i])
+            if (code - 1 >= (1 << i))
+                return stbi__err("bad codelengths", "Corrupt PNG");
+        z->maxcode[i] = code << (16 - i); // preshift for inner loop
+        code <<= 1;
+        k += sizes[i];
+    }
+    z->maxcode[16] = 0x10000; // sentinel
+    for (i = 0; i < num; ++i) {
+        int s = sizelist[i];
+        if (s) {
+            int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
+            stbi__uint16 fastv = (stbi__uint16)((s << 9) | i);
+            z->size[c] = (stbi_uc)s;
+            z->value[c] = (stbi__uint16)i;
+            if (s <= STBI__ZFAST_BITS) {
+                int j = stbi__bit_reverse(next_code[s], s);
+                while (j < (1 << STBI__ZFAST_BITS)) {
+                    z->fast[j] = fastv;
+                    j += (1 << s);
+                }
+            }
+            ++next_code[s];
+        }
+    }
+    return 1;
+}
+
+// zlib-from-memory implementation for PNG reading
+//    because PNG allows splitting the zlib stream arbitrarily,
+//    and it's annoying structurally to have PNG call ZLIB call PNG,
+//    we require PNG read all the IDATs and combine them into a single
+//    memory buffer
+
+typedef struct {
+    stbi_uc *zbuffer, *zbuffer_end;
+    int num_bits;
+    stbi__uint32 code_buffer;
+
+    char* zout;
+    char* zout_start;
+    char* zout_end;
+    int z_expandable;
+
+    stbi__zhuffman z_length, z_distance;
+} stbi__zbuf;
+
+stbi_inline static stbi_uc stbi__zget8(stbi__zbuf* z)
+{
+    if (z->zbuffer >= z->zbuffer_end)
+        return 0;
+    return *z->zbuffer++;
+}
+
+static void stbi__fill_bits(stbi__zbuf* z)
+{
+    do {
+        STBI_ASSERT(z->code_buffer < (1U << z->num_bits));
+        z->code_buffer |= (unsigned int)stbi__zget8(z) << z->num_bits;
+        z->num_bits += 8;
+    } while (z->num_bits <= 24);
+}
+
+stbi_inline static unsigned int stbi__zreceive(stbi__zbuf* z, int n)
+{
+    unsigned int k;
+    if (z->num_bits < n)
+        stbi__fill_bits(z);
+    k = z->code_buffer & ((1 << n) - 1);
+    z->code_buffer >>= n;
+    z->num_bits -= n;
+    return k;
+}
+
+static int stbi__zhuffman_decode_slowpath(stbi__zbuf* a, stbi__zhuffman* z)
+{
+    int b, s, k;
+    // not resolved by fast table, so compute it the slow way
+    // use jpeg approach, which requires MSbits at top
+    k = stbi__bit_reverse(a->code_buffer, 16);
+    for (s = STBI__ZFAST_BITS + 1;; ++s)
+        if (k < z->maxcode[s])
+            break;
+    if (s == 16)
+        return -1; // invalid code!
+    // code size is s, so:
+    b = (k >> (16 - s)) - z->firstcode[s] + z->firstsymbol[s];
+    STBI_ASSERT(z->size[b] == s);
+    a->code_buffer >>= s;
+    a->num_bits -= s;
+    return z->value[b];
+}
+
+stbi_inline static int stbi__zhuffman_decode(stbi__zbuf* a, stbi__zhuffman* z)
+{
+    int b, s;
+    if (a->num_bits < 16)
+        stbi__fill_bits(a);
+    b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
+    if (b) {
+        s = b >> 9;
+        a->code_buffer >>= s;
+        a->num_bits -= s;
+        return b & 511;
+    }
+    return stbi__zhuffman_decode_slowpath(a, z);
+}
+
+static int stbi__zexpand(stbi__zbuf* z, char* zout,
+                         int n) // need to make room for n bytes
+{
+    char* q;
+    int cur, limit, old_limit;
+    z->zout = zout;
+    if (!z->z_expandable)
+        return stbi__err("output buffer limit", "Corrupt PNG");
+    cur = (int)(z->zout - z->zout_start);
+    limit = old_limit = (int)(z->zout_end - z->zout_start);
+    while (cur + n > limit)
+        limit *= 2;
+    q = (char*)STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
+    STBI_NOTUSED(old_limit);
+    if (q == NULL)
+        return stbi__err("outofmem", "Out of memory");
+    z->zout_start = q;
+    z->zout = q + cur;
+    z->zout_end = q + limit;
+    return 1;
+}
+
+static const int stbi__zlength_base[31] = {
+    3,  4,  5,  6,  7,  8,  9,  10,  11,  13,  15,  17,  19,  23, 27, 31,
+    35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0,  0};
+
+static const int stbi__zlength_extra[31] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
+                                            1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4,
+                                            4, 4, 5, 5, 5, 5, 0, 0, 0};
+
+static const int stbi__zdist_base[32] = {
+    1,    2,    3,    4,    5,    7,     9,     13,    17,  25,   33,
+    49,   65,   97,   129,  193,  257,   385,   513,   769, 1025, 1537,
+    2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 0,   0};
+
+static const int stbi__zdist_extra[32] = {0, 0, 0,  0,  1,  1,  2,  2,  3,  3,
+                                          4, 4, 5,  5,  6,  6,  7,  7,  8,  8,
+                                          9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
+
+static int stbi__parse_huffman_block(stbi__zbuf* a)
+{
+    char* zout = a->zout;
+    for (;;) {
+        int z = stbi__zhuffman_decode(a, &a->z_length);
+        if (z < 256) {
+            if (z < 0)
+                return stbi__err("bad huffman code",
+                                 "Corrupt PNG"); // error in huffman codes
+            if (zout >= a->zout_end) {
+                if (!stbi__zexpand(a, zout, 1))
+                    return 0;
+                zout = a->zout;
+            }
+            *zout++ = (char)z;
+        }
+        else {
+            stbi_uc* p;
+            int len, dist;
+            if (z == 256) {
+                a->zout = zout;
+                return 1;
+            }
+            z -= 257;
+            len = stbi__zlength_base[z];
+            if (stbi__zlength_extra[z])
+                len += stbi__zreceive(a, stbi__zlength_extra[z]);
+            z = stbi__zhuffman_decode(a, &a->z_distance);
+            if (z < 0)
+                return stbi__err("bad huffman code", "Corrupt PNG");
+            dist = stbi__zdist_base[z];
+            if (stbi__zdist_extra[z])
+                dist += stbi__zreceive(a, stbi__zdist_extra[z]);
+            if (zout - a->zout_start < dist)
+                return stbi__err("bad dist", "Corrupt PNG");
+            if (zout + len > a->zout_end) {
+                if (!stbi__zexpand(a, zout, len))
+                    return 0;
+                zout = a->zout;
+            }
+            p = (stbi_uc*)(zout - dist);
+            if (dist == 1) { // run of one byte; common in images.
+                stbi_uc v = *p;
+                if (len) {
+                    do
+                        *zout++ = v;
+                    while (--len);
+                }
+            }
+            else {
+                if (len) {
+                    do
+                        *zout++ = *p++;
+                    while (--len);
+                }
+            }
+        }
+    }
+}
+
+static int stbi__compute_huffman_codes(stbi__zbuf* a)
+{
+    static const stbi_uc length_dezigzag[19] = {
+        16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+    stbi__zhuffman z_codelength;
+    stbi_uc lencodes[286 + 32 + 137]; // padding for maximum single op
+    stbi_uc codelength_sizes[19];
+    int i, n;
+
+    int hlit = stbi__zreceive(a, 5) + 257;
+    int hdist = stbi__zreceive(a, 5) + 1;
+    int hclen = stbi__zreceive(a, 4) + 4;
+    int ntot = hlit + hdist;
+
+    memset(codelength_sizes, 0, sizeof(codelength_sizes));
+    for (i = 0; i < hclen; ++i) {
+        int s = stbi__zreceive(a, 3);
+        codelength_sizes[length_dezigzag[i]] = (stbi_uc)s;
+    }
+    if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19))
+        return 0;
+
+    n = 0;
+    while (n < ntot) {
+        int c = stbi__zhuffman_decode(a, &z_codelength);
+        if (c < 0 || c >= 19)
+            return stbi__err("bad codelengths", "Corrupt PNG");
+        if (c < 16)
+            lencodes[n++] = (stbi_uc)c;
+        else {
+            stbi_uc fill = 0;
+            if (c == 16) {
+                c = stbi__zreceive(a, 2) + 3;
+                if (n == 0)
+                    return stbi__err("bad codelengths", "Corrupt PNG");
+                fill = lencodes[n - 1];
+            }
+            else if (c == 17)
+                c = stbi__zreceive(a, 3) + 3;
+            else {
+                STBI_ASSERT(c == 18);
+                c = stbi__zreceive(a, 7) + 11;
+            }
+            if (ntot - n < c)
+                return stbi__err("bad codelengths", "Corrupt PNG");
+            memset(lencodes + n, fill, c);
+            n += c;
+        }
+    }
+    if (n != ntot)
+        return stbi__err("bad codelengths", "Corrupt PNG");
+    if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit))
+        return 0;
+    if (!stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist))
+        return 0;
+    return 1;
+}
+
+static int stbi__parse_uncompressed_block(stbi__zbuf* a)
+{
+    stbi_uc header[4];
+    int len, nlen, k;
+    if (a->num_bits & 7)
+        stbi__zreceive(a, a->num_bits & 7); // discard
+    // drain the bit-packed data into header
+    k = 0;
+    while (a->num_bits > 0) {
+        header[k++] =
+            (stbi_uc)(a->code_buffer & 255); // suppress MSVC run-time check
+        a->code_buffer >>= 8;
+        a->num_bits -= 8;
+    }
+    STBI_ASSERT(a->num_bits == 0);
+    // now fill header the normal way
+    while (k < 4)
+        header[k++] = stbi__zget8(a);
+    len = header[1] * 256 + header[0];
+    nlen = header[3] * 256 + header[2];
+    if (nlen != (len ^ 0xffff))
+        return stbi__err("zlib corrupt", "Corrupt PNG");
+    if (a->zbuffer + len > a->zbuffer_end)
+        return stbi__err("read past buffer", "Corrupt PNG");
+    if (a->zout + len > a->zout_end)
+        if (!stbi__zexpand(a, a->zout, len))
+            return 0;
+    memcpy(a->zout, a->zbuffer, len);
+    a->zbuffer += len;
+    a->zout += len;
+    return 1;
+}
+
+static int stbi__parse_zlib_header(stbi__zbuf* a)
+{
+    int cmf = stbi__zget8(a);
+    int cm = cmf & 15;
+    /* int cinfo = cmf >> 4; */
+    int flg = stbi__zget8(a);
+    if ((cmf * 256 + flg) % 31 != 0)
+        return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec
+    if (flg & 32)
+        return stbi__err("no preset dict",
+                         "Corrupt PNG"); // preset dictionary not allowed in png
+    if (cm != 8)
+        return stbi__err("bad compression",
+                         "Corrupt PNG"); // DEFLATE required for png
+    // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
+    return 1;
+}
+
+static const stbi_uc stbi__zdefault_length[288] = {
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7,
+    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8};
+static const stbi_uc stbi__zdefault_distance[32] = {
+    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5};
+/*
+Init algorithm:
+{
+   int i;   // use <= to match clearly with spec
+   for (i=0; i <= 143; ++i)     stbi__zdefault_length[i]   = 8;
+   for (   ; i <= 255; ++i)     stbi__zdefault_length[i]   = 9;
+   for (   ; i <= 279; ++i)     stbi__zdefault_length[i]   = 7;
+   for (   ; i <= 287; ++i)     stbi__zdefault_length[i]   = 8;
+
+   for (i=0; i <=  31; ++i)     stbi__zdefault_distance[i] = 5;
+}
+*/
+
+static int stbi__parse_zlib(stbi__zbuf* a, int parse_header)
+{
+    int final, type;
+    if (parse_header)
+        if (!stbi__parse_zlib_header(a))
+            return 0;
+    a->num_bits = 0;
+    a->code_buffer = 0;
+    do {
+        final = stbi__zreceive(a, 1);
+        type = stbi__zreceive(a, 2);
+        if (type == 0) {
+            if (!stbi__parse_uncompressed_block(a))
+                return 0;
+        }
+        else if (type == 3) {
+            return 0;
+        }
+        else {
+            if (type == 1) {
+                // use fixed code lengths
+                if (!stbi__zbuild_huffman(&a->z_length, stbi__zdefault_length,
+                                          288))
+                    return 0;
+                if (!stbi__zbuild_huffman(&a->z_distance,
+                                          stbi__zdefault_distance, 32))
+                    return 0;
+            }
+            else {
+                if (!stbi__compute_huffman_codes(a))
+                    return 0;
+            }
+            if (!stbi__parse_huffman_block(a))
+                return 0;
+        }
+    } while (!final);
+    return 1;
+}
+
+static int stbi__do_zlib(stbi__zbuf* a, char* obuf, int olen, int exp,
+                         int parse_header)
+{
+    a->zout_start = obuf;
+    a->zout = obuf;
+    a->zout_end = obuf + olen;
+    a->z_expandable = exp;
+
+    return stbi__parse_zlib(a, parse_header);
+}
+
+STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len,
+                                                int initial_size, int* outlen)
+{
+    stbi__zbuf a;
+    char* p = (char*)stbi__malloc(initial_size);
+    if (p == NULL)
+        return NULL;
+    a.zbuffer = (stbi_uc*)buffer;
+    a.zbuffer_end = (stbi_uc*)buffer + len;
+    if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
+        if (outlen)
+            *outlen = (int)(a.zout - a.zout_start);
+        return a.zout_start;
+    }
+    else {
+        STBI_FREE(a.zout_start);
+        return NULL;
+    }
+}
+
+STBIDEF char* stbi_zlib_decode_malloc(char const* buffer, int len, int* outlen)
+{
+    return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
+}
+
+STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer,
+                                                           int len,
+                                                           int initial_size,
+                                                           int* outlen,
+                                                           int parse_header)
+{
+    stbi__zbuf a;
+    char* p = (char*)stbi__malloc(initial_size);
+    if (p == NULL)
+        return NULL;
+    a.zbuffer = (stbi_uc*)buffer;
+    a.zbuffer_end = (stbi_uc*)buffer + len;
+    if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
+        if (outlen)
+            *outlen = (int)(a.zout - a.zout_start);
+        return a.zout_start;
+    }
+    else {
+        STBI_FREE(a.zout_start);
+        return NULL;
+    }
+}
+
+STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen,
+                                    char const* ibuffer, int ilen)
+{
+    stbi__zbuf a;
+    a.zbuffer = (stbi_uc*)ibuffer;
+    a.zbuffer_end = (stbi_uc*)ibuffer + ilen;
+    if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
+        return (int)(a.zout - a.zout_start);
+    else
+        return -1;
+}
+
+STBIDEF char* stbi_zlib_decode_noheader_malloc(char const* buffer, int len,
+                                               int* outlen)
+{
+    stbi__zbuf a;
+    char* p = (char*)stbi__malloc(16384);
+    if (p == NULL)
+        return NULL;
+    a.zbuffer = (stbi_uc*)buffer;
+    a.zbuffer_end = (stbi_uc*)buffer + len;
+    if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
+        if (outlen)
+            *outlen = (int)(a.zout - a.zout_start);
+        return a.zout_start;
+    }
+    else {
+        STBI_FREE(a.zout_start);
+        return NULL;
+    }
+}
+
+STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen,
+                                             const char* ibuffer, int ilen)
+{
+    stbi__zbuf a;
+    a.zbuffer = (stbi_uc*)ibuffer;
+    a.zbuffer_end = (stbi_uc*)ibuffer + ilen;
+    if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
+        return (int)(a.zout - a.zout_start);
+    else
+        return -1;
+}
+#endif
+
+// public domain "baseline" PNG decoder   v0.10  Sean Barrett 2006-11-18
+//    simple implementation
+//      - only 8-bit samples
+//      - no CRC checking
+//      - allocates lots of intermediate memory
+//        - avoids problem of streaming data between subsystems
+//        - avoids explicit window management
+//    performance
+//      - uses stb_zlib, a PD zlib implementation with fast huffman decoding
+
+#ifndef STBI_NO_PNG
+typedef struct {
+    stbi__uint32 length;
+    stbi__uint32 type;
+} stbi__pngchunk;
+
+static stbi__pngchunk stbi__get_chunk_header(stbi__context* s)
+{
+    stbi__pngchunk c;
+    c.length = stbi__get32be(s);
+    c.type = stbi__get32be(s);
+    return c;
+}
+
+static int stbi__check_png_header(stbi__context* s)
+{
+    static const stbi_uc png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+    int i;
+    for (i = 0; i < 8; ++i)
+        if (stbi__get8(s) != png_sig[i])
+            return stbi__err("bad png sig", "Not a PNG");
+    return 1;
+}
+
+typedef struct {
+    stbi__context* s;
+    stbi_uc *idata, *expanded, *out;
+    int depth;
+} stbi__png;
+
+enum {
+    STBI__F_none = 0,
+    STBI__F_sub = 1,
+    STBI__F_up = 2,
+    STBI__F_avg = 3,
+    STBI__F_paeth = 4,
+    // synthetic filters used for first scanline to avoid needing a dummy row of
+    // 0s
+    STBI__F_avg_first,
+    STBI__F_paeth_first
+};
+
+static stbi_uc first_row_filter[5] = {STBI__F_none, STBI__F_sub, STBI__F_none,
+                                      STBI__F_avg_first, STBI__F_paeth_first};
+
+static int stbi__paeth(int a, int b, int c)
+{
+    int p = a + b - c;
+    int pa = abs(p - a);
+    int pb = abs(p - b);
+    int pc = abs(p - c);
+    if (pa <= pb && pa <= pc)
+        return a;
+    if (pb <= pc)
+        return b;
+    return c;
+}
+
+static const stbi_uc stbi__depth_scale_table[9] = {0, 0xff, 0x55, 0,   0x11,
+                                                   0, 0,    0,    0x01};
+
+// create the png data from post-deflated data
+static int stbi__create_png_image_raw(stbi__png* a, stbi_uc* raw,
+                                      stbi__uint32 raw_len, int out_n,
+                                      stbi__uint32 x, stbi__uint32 y, int depth,
+                                      int color)
+{
+    int bytes = (depth == 16 ? 2 : 1);
+    stbi__context* s = a->s;
+    stbi__uint32 i, j, stride = x * out_n * bytes;
+    stbi__uint32 img_len, img_width_bytes;
+    int k;
+    int img_n = s->img_n; // copy it into a local for later
+
+    int output_bytes = out_n * bytes;
+    int filter_bytes = img_n * bytes;
+    int width = x;
+
+    STBI_ASSERT(out_n == s->img_n || out_n == s->img_n + 1);
+    a->out = (stbi_uc*)stbi__malloc_mad3(
+        x, y, output_bytes, 0); // extra bytes to write off the end into
+    if (!a->out)
+        return stbi__err("outofmem", "Out of memory");
+
+    if (!stbi__mad3sizes_valid(img_n, x, depth, 7))
+        return stbi__err("too large", "Corrupt PNG");
+    img_width_bytes = (((img_n * x * depth) + 7) >> 3);
+    img_len = (img_width_bytes + 1) * y;
+
+    // we used to check for exact match between raw_len and img_len on
+    // non-interlaced PNGs, but issue #276 reported a PNG in the wild that had
+    // extra data at the end (all zeros), so just check for raw_len < img_len
+    // always.
+    if (raw_len < img_len)
+        return stbi__err("not enough pixels", "Corrupt PNG");
+
+    for (j = 0; j < y; ++j) {
+        stbi_uc* cur = a->out + stride * j;
+        stbi_uc* prior;
+        int filter = *raw++;
+
+        if (filter > 4)
+            return stbi__err("invalid filter", "Corrupt PNG");
+
+        if (depth < 8) {
+            STBI_ASSERT(img_width_bytes <= x);
+            cur += x * out_n -
+                   img_width_bytes; // store output to the rightmost img_len
+                                    // bytes, so we can decode in place
+            filter_bytes = 1;
+            width = img_width_bytes;
+        }
+        prior = cur - stride; // bugfix: need to compute this after 'cur +='
+                              // computation above
+
+        // if first row, use special filter that doesn't sample previous row
+        if (j == 0)
+            filter = first_row_filter[filter];
+
+        // handle first byte explicitly
+        for (k = 0; k < filter_bytes; ++k) {
+            switch (filter) {
+            case STBI__F_none:
+                cur[k] = raw[k];
+                break;
+            case STBI__F_sub:
+                cur[k] = raw[k];
+                break;
+            case STBI__F_up:
+                cur[k] = STBI__BYTECAST(raw[k] + prior[k]);
+                break;
+            case STBI__F_avg:
+                cur[k] = STBI__BYTECAST(raw[k] + (prior[k] >> 1));
+                break;
+            case STBI__F_paeth:
+                cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0, prior[k], 0));
+                break;
+            case STBI__F_avg_first:
+                cur[k] = raw[k];
+                break;
+            case STBI__F_paeth_first:
+                cur[k] = raw[k];
+                break;
+            }
+        }
+
+        if (depth == 8) {
+            if (img_n != out_n)
+                cur[img_n] = 255; // first pixel
+            raw += img_n;
+            cur += out_n;
+            prior += out_n;
+        }
+        else if (depth == 16) {
+            if (img_n != out_n) {
+                cur[filter_bytes] = 255;     // first pixel top byte
+                cur[filter_bytes + 1] = 255; // first pixel bottom byte
+            }
+            raw += filter_bytes;
+            cur += output_bytes;
+            prior += output_bytes;
+        }
+        else {
+            raw += 1;
+            cur += 1;
+            prior += 1;
+        }
+
+        // this is a little gross, so that we don't switch per-pixel or
+        // per-component
+        if (depth < 8 || img_n == out_n) {
+            int nk = (width - 1) * filter_bytes;
+#define STBI__CASE(f)                                                          \
+    case f:                                                                    \
+        for (k = 0; k < nk; ++k)
+            switch (filter) {
+            // "none" filter turns into a memcpy here; make that explicit.
+            case STBI__F_none:
+                memcpy(cur, raw, nk);
+                break;
+                STBI__CASE(STBI__F_sub)
+                {
+                    cur[k] = STBI__BYTECAST(raw[k] + cur[k - filter_bytes]);
+                }
+                break;
+                STBI__CASE(STBI__F_up)
+                {
+                    cur[k] = STBI__BYTECAST(raw[k] + prior[k]);
+                }
+                break;
+                STBI__CASE(STBI__F_avg)
+                {
+                    cur[k] = STBI__BYTECAST(
+                        raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1));
+                }
+                break;
+                STBI__CASE(STBI__F_paeth)
+                {
+                    cur[k] = STBI__BYTECAST(
+                        raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k],
+                                             prior[k - filter_bytes]));
+                }
+                break;
+                STBI__CASE(STBI__F_avg_first)
+                {
+                    cur[k] =
+                        STBI__BYTECAST(raw[k] + (cur[k - filter_bytes] >> 1));
+                }
+                break;
+                STBI__CASE(STBI__F_paeth_first)
+                {
+                    cur[k] = STBI__BYTECAST(
+                        raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0));
+                }
+                break;
+            }
+#undef STBI__CASE
+            raw += nk;
+        }
+        else {
+            STBI_ASSERT(img_n + 1 == out_n);
+#define STBI__CASE(f)                                                          \
+    case f:                                                                    \
+        for (i = x - 1; i >= 1; --i, cur[filter_bytes] = 255,                  \
+            raw += filter_bytes, cur += output_bytes, prior += output_bytes)   \
+            for (k = 0; k < filter_bytes; ++k)
+            switch (filter) {
+                STBI__CASE(STBI__F_none) { cur[k] = raw[k]; }
+                break;
+                STBI__CASE(STBI__F_sub)
+                {
+                    cur[k] = STBI__BYTECAST(raw[k] + cur[k - output_bytes]);
+                }
+                break;
+                STBI__CASE(STBI__F_up)
+                {
+                    cur[k] = STBI__BYTECAST(raw[k] + prior[k]);
+                }
+                break;
+                STBI__CASE(STBI__F_avg)
+                {
+                    cur[k] = STBI__BYTECAST(
+                        raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1));
+                }
+                break;
+                STBI__CASE(STBI__F_paeth)
+                {
+                    cur[k] = STBI__BYTECAST(
+                        raw[k] + stbi__paeth(cur[k - output_bytes], prior[k],
+                                             prior[k - output_bytes]));
+                }
+                break;
+                STBI__CASE(STBI__F_avg_first)
+                {
+                    cur[k] =
+                        STBI__BYTECAST(raw[k] + (cur[k - output_bytes] >> 1));
+                }
+                break;
+                STBI__CASE(STBI__F_paeth_first)
+                {
+                    cur[k] = STBI__BYTECAST(
+                        raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0));
+                }
+                break;
+            }
+#undef STBI__CASE
+
+            // the loop above sets the high byte of the pixels' alpha, but for
+            // 16 bit png files we also need the low byte set. we'll do that
+            // here.
+            if (depth == 16) {
+                cur = a->out +
+                      stride * j; // start at the beginning of the row again
+                for (i = 0; i < x; ++i, cur += output_bytes) {
+                    cur[filter_bytes + 1] = 255;
+                }
+            }
+        }
+    }
+
+    // we make a separate pass to expand bits to pixels; for performance,
+    // this could run two scanlines behind the above code, so it won't
+    // intefere with filtering but will still be in the cache.
+    if (depth < 8) {
+        for (j = 0; j < y; ++j) {
+            stbi_uc* cur = a->out + stride * j;
+            stbi_uc* in = a->out + stride * j + x * out_n - img_width_bytes;
+            // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the
+            // common 8-bit path optimal at minimal cost for 1/2/4-bit png
+            // guarante byte alignment, if width is not multiple of 8/4/2 we'll
+            // decode dummy trailing data that will be skipped in the later loop
+            stbi_uc scale = (color == 0)
+                                ? stbi__depth_scale_table[depth]
+                                : 1; // scale grayscale values to 0..255 range
+
+            // note that the final byte might overshoot and write more data than
+            // desired. we can allocate enough data that this never writes out
+            // of memory, but it could also overwrite the next scanline. can it
+            // overwrite non-empty data on the next scanline? yes, consider
+            // 1-pixel-wide scanlines with 1-bit-per-pixel. so we need to
+            // explicitly clamp the final ones
+
+            if (depth == 4) {
+                for (k = x * img_n; k >= 2; k -= 2, ++in) {
+                    *cur++ = scale * ((*in >> 4));
+                    *cur++ = scale * ((*in) & 0x0f);
+                }
+                if (k > 0)
+                    *cur++ = scale * ((*in >> 4));
+            }
+            else if (depth == 2) {
+                for (k = x * img_n; k >= 4; k -= 4, ++in) {
+                    *cur++ = scale * ((*in >> 6));
+                    *cur++ = scale * ((*in >> 4) & 0x03);
+                    *cur++ = scale * ((*in >> 2) & 0x03);
+                    *cur++ = scale * ((*in) & 0x03);
+                }
+                if (k > 0)
+                    *cur++ = scale * ((*in >> 6));
+                if (k > 1)
+                    *cur++ = scale * ((*in >> 4) & 0x03);
+                if (k > 2)
+                    *cur++ = scale * ((*in >> 2) & 0x03);
+            }
+            else if (depth == 1) {
+                for (k = x * img_n; k >= 8; k -= 8, ++in) {
+                    *cur++ = scale * ((*in >> 7));
+                    *cur++ = scale * ((*in >> 6) & 0x01);
+                    *cur++ = scale * ((*in >> 5) & 0x01);
+                    *cur++ = scale * ((*in >> 4) & 0x01);
+                    *cur++ = scale * ((*in >> 3) & 0x01);
+                    *cur++ = scale * ((*in >> 2) & 0x01);
+                    *cur++ = scale * ((*in >> 1) & 0x01);
+                    *cur++ = scale * ((*in) & 0x01);
+                }
+                if (k > 0)
+                    *cur++ = scale * ((*in >> 7));
+                if (k > 1)
+                    *cur++ = scale * ((*in >> 6) & 0x01);
+                if (k > 2)
+                    *cur++ = scale * ((*in >> 5) & 0x01);
+                if (k > 3)
+                    *cur++ = scale * ((*in >> 4) & 0x01);
+                if (k > 4)
+                    *cur++ = scale * ((*in >> 3) & 0x01);
+                if (k > 5)
+                    *cur++ = scale * ((*in >> 2) & 0x01);
+                if (k > 6)
+                    *cur++ = scale * ((*in >> 1) & 0x01);
+            }
+            if (img_n != out_n) {
+                int q;
+                // insert alpha = 255
+                cur = a->out + stride * j;
+                if (img_n == 1) {
+                    for (q = x - 1; q >= 0; --q) {
+                        cur[q * 2 + 1] = 255;
+                        cur[q * 2 + 0] = cur[q];
+                    }
+                }
+                else {
+                    STBI_ASSERT(img_n == 3);
+                    for (q = x - 1; q >= 0; --q) {
+                        cur[q * 4 + 3] = 255;
+                        cur[q * 4 + 2] = cur[q * 3 + 2];
+                        cur[q * 4 + 1] = cur[q * 3 + 1];
+                        cur[q * 4 + 0] = cur[q * 3 + 0];
+                    }
+                }
+            }
+        }
+    }
+    else if (depth == 16) {
+        // force the image data from big-endian to platform-native.
+        // this is done in a separate pass due to the decoding relying
+        // on the data being untouched, but could probably be done
+        // per-line during decode if care is taken.
+        stbi_uc* cur = a->out;
+        stbi__uint16* cur16 = (stbi__uint16*)cur;
+
+        for (i = 0; i < x * y * out_n; ++i, cur16++, cur += 2) {
+            *cur16 = (cur[0] << 8) | cur[1];
+        }
+    }
+
+    return 1;
+}
+
+static int stbi__create_png_image(stbi__png* a, stbi_uc* image_data,
+                                  stbi__uint32 image_data_len, int out_n,
+                                  int depth, int color, int interlaced)
+{
+    int bytes = (depth == 16 ? 2 : 1);
+    int out_bytes = out_n * bytes;
+    stbi_uc* final;
+    int p;
+    if (!interlaced)
+        return stbi__create_png_image_raw(a, image_data, image_data_len, out_n,
+                                          a->s->img_x, a->s->img_y, depth,
+                                          color);
+
+    // de-interlacing
+    final = (stbi_uc*)stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
+    for (p = 0; p < 7; ++p) {
+        int xorig[] = {0, 4, 0, 2, 0, 1, 0};
+        int yorig[] = {0, 0, 4, 0, 2, 0, 1};
+        int xspc[] = {8, 8, 4, 4, 2, 2, 1};
+        int yspc[] = {8, 8, 8, 4, 4, 2, 2};
+        int i, j, x, y;
+        // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
+        x = (a->s->img_x - xorig[p] + xspc[p] - 1) / xspc[p];
+        y = (a->s->img_y - yorig[p] + yspc[p] - 1) / yspc[p];
+        if (x && y) {
+            stbi__uint32 img_len =
+                ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
+            if (!stbi__create_png_image_raw(a, image_data, image_data_len,
+                                            out_n, x, y, depth, color)) {
+                STBI_FREE(final);
+                return 0;
+            }
+            for (j = 0; j < y; ++j) {
+                for (i = 0; i < x; ++i) {
+                    int out_y = j * yspc[p] + yorig[p];
+                    int out_x = i * xspc[p] + xorig[p];
+                    memcpy(final + out_y * a->s->img_x * out_bytes +
+                               out_x * out_bytes,
+                           a->out + (j * x + i) * out_bytes, out_bytes);
+                }
+            }
+            STBI_FREE(a->out);
+            image_data += img_len;
+            image_data_len -= img_len;
+        }
+    }
+    a->out = final;
+
+    return 1;
+}
+
+static int stbi__compute_transparency(stbi__png* z, stbi_uc tc[3], int out_n)
+{
+    stbi__context* s = z->s;
+    stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+    stbi_uc* p = z->out;
+
+    // compute color-based transparency, assuming we've
+    // already got 255 as the alpha value in the output
+    STBI_ASSERT(out_n == 2 || out_n == 4);
+
+    if (out_n == 2) {
+        for (i = 0; i < pixel_count; ++i) {
+            p[1] = (p[0] == tc[0] ? 0 : 255);
+            p += 2;
+        }
+    }
+    else {
+        for (i = 0; i < pixel_count; ++i) {
+            if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
+                p[3] = 0;
+            p += 4;
+        }
+    }
+    return 1;
+}
+
+static int stbi__compute_transparency16(stbi__png* z, stbi__uint16 tc[3],
+                                        int out_n)
+{
+    stbi__context* s = z->s;
+    stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+    stbi__uint16* p = (stbi__uint16*)z->out;
+
+    // compute color-based transparency, assuming we've
+    // already got 65535 as the alpha value in the output
+    STBI_ASSERT(out_n == 2 || out_n == 4);
+
+    if (out_n == 2) {
+        for (i = 0; i < pixel_count; ++i) {
+            p[1] = (p[0] == tc[0] ? 0 : 65535);
+            p += 2;
+        }
+    }
+    else {
+        for (i = 0; i < pixel_count; ++i) {
+            if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
+                p[3] = 0;
+            p += 4;
+        }
+    }
+    return 1;
+}
+
+static int stbi__expand_png_palette(stbi__png* a, stbi_uc* palette, int len,
+                                    int pal_img_n)
+{
+    stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
+    stbi_uc *p, *temp_out, *orig = a->out;
+
+    p = (stbi_uc*)stbi__malloc_mad2(pixel_count, pal_img_n, 0);
+    if (p == NULL)
+        return stbi__err("outofmem", "Out of memory");
+
+    // between here and free(out) below, exitting would leak
+    temp_out = p;
+
+    if (pal_img_n == 3) {
+        for (i = 0; i < pixel_count; ++i) {
+            int n = orig[i] * 4;
+            p[0] = palette[n];
+            p[1] = palette[n + 1];
+            p[2] = palette[n + 2];
+            p += 3;
+        }
+    }
+    else {
+        for (i = 0; i < pixel_count; ++i) {
+            int n = orig[i] * 4;
+            p[0] = palette[n];
+            p[1] = palette[n + 1];
+            p[2] = palette[n + 2];
+            p[3] = palette[n + 3];
+            p += 4;
+        }
+    }
+    STBI_FREE(a->out);
+    a->out = temp_out;
+
+    STBI_NOTUSED(len);
+
+    return 1;
+}
+
+static int stbi__unpremultiply_on_load = 0;
+static int stbi__de_iphone_flag = 0;
+
+STBIDEF void
+stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
+{
+    stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply;
+}
+
+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
+{
+    stbi__de_iphone_flag = flag_true_if_should_convert;
+}
+
+static void stbi__de_iphone(stbi__png* z)
+{
+    stbi__context* s = z->s;
+    stbi__uint32 i, pixel_count = s->img_x * s->img_y;
+    stbi_uc* p = z->out;
+
+    if (s->img_out_n == 3) { // convert bgr to rgb
+        for (i = 0; i < pixel_count; ++i) {
+            stbi_uc t = p[0];
+            p[0] = p[2];
+            p[2] = t;
+            p += 3;
+        }
+    }
+    else {
+        STBI_ASSERT(s->img_out_n == 4);
+        if (stbi__unpremultiply_on_load) {
+            // convert bgr to rgb and unpremultiply
+            for (i = 0; i < pixel_count; ++i) {
+                stbi_uc a = p[3];
+                stbi_uc t = p[0];
+                if (a) {
+                    stbi_uc half = a / 2;
+                    p[0] = (p[2] * 255 + half) / a;
+                    p[1] = (p[1] * 255 + half) / a;
+                    p[2] = (t * 255 + half) / a;
+                }
+                else {
+                    p[0] = p[2];
+                    p[2] = t;
+                }
+                p += 4;
+            }
+        }
+        else {
+            // convert bgr to rgb
+            for (i = 0; i < pixel_count; ++i) {
+                stbi_uc t = p[0];
+                p[0] = p[2];
+                p[2] = t;
+                p += 4;
+            }
+        }
+    }
+}
+
+#define STBI__PNG_TYPE(a, b, c, d)                                             \
+    (((unsigned)(a) << 24) + ((unsigned)(b) << 16) + ((unsigned)(c) << 8) +    \
+     (unsigned)(d))
+
+static int stbi__parse_png_file(stbi__png* z, int scan, int req_comp)
+{
+    stbi_uc palette[1024], pal_img_n = 0;
+    stbi_uc has_trans = 0, tc[3] = {0};
+    stbi__uint16 tc16[3];
+    stbi__uint32 ioff = 0, idata_limit = 0, i, pal_len = 0;
+    int first = 1, k, interlace = 0, color = 0, is_iphone = 0;
+    stbi__context* s = z->s;
+
+    z->expanded = NULL;
+    z->idata = NULL;
+    z->out = NULL;
+
+    if (!stbi__check_png_header(s))
+        return 0;
+
+    if (scan == STBI__SCAN_type)
+        return 1;
+
+    for (;;) {
+        stbi__pngchunk c = stbi__get_chunk_header(s);
+        switch (c.type) {
+        case STBI__PNG_TYPE('C', 'g', 'B', 'I'):
+            is_iphone = 1;
+            stbi__skip(s, c.length);
+            break;
+        case STBI__PNG_TYPE('I', 'H', 'D', 'R'): {
+            int comp, filter;
+            if (!first)
+                return stbi__err("multiple IHDR", "Corrupt PNG");
+            first = 0;
+            if (c.length != 13)
+                return stbi__err("bad IHDR len", "Corrupt PNG");
+            s->img_x = stbi__get32be(s);
+            if (s->img_x > (1 << 24))
+                return stbi__err("too large", "Very large image (corrupt?)");
+            s->img_y = stbi__get32be(s);
+            if (s->img_y > (1 << 24))
+                return stbi__err("too large", "Very large image (corrupt?)");
+            z->depth = stbi__get8(s);
+            if (z->depth != 1 && z->depth != 2 && z->depth != 4 &&
+                z->depth != 8 && z->depth != 16)
+                return stbi__err("1/2/4/8/16-bit only",
+                                 "PNG not supported: 1/2/4/8/16-bit only");
+            color = stbi__get8(s);
+            if (color > 6)
+                return stbi__err("bad ctype", "Corrupt PNG");
+            if (color == 3 && z->depth == 16)
+                return stbi__err("bad ctype", "Corrupt PNG");
+            if (color == 3)
+                pal_img_n = 3;
+            else if (color & 1)
+                return stbi__err("bad ctype", "Corrupt PNG");
+            comp = stbi__get8(s);
+            if (comp)
+                return stbi__err("bad comp method", "Corrupt PNG");
+            filter = stbi__get8(s);
+            if (filter)
+                return stbi__err("bad filter method", "Corrupt PNG");
+            interlace = stbi__get8(s);
+            if (interlace > 1)
+                return stbi__err("bad interlace method", "Corrupt PNG");
+            if (!s->img_x || !s->img_y)
+                return stbi__err("0-pixel image", "Corrupt PNG");
+            if (!pal_img_n) {
+                s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
+                if ((1 << 30) / s->img_x / s->img_n < s->img_y)
+                    return stbi__err("too large", "Image too large to decode");
+                if (scan == STBI__SCAN_header)
+                    return 1;
+            }
+            else {
+                // if paletted, then pal_n is our final components, and
+                // img_n is # components to decompress/filter.
+                s->img_n = 1;
+                if ((1 << 30) / s->img_x / 4 < s->img_y)
+                    return stbi__err("too large", "Corrupt PNG");
+                // if SCAN_header, have to scan to see if we have a tRNS
+            }
+            break;
+        }
+
+        case STBI__PNG_TYPE('P', 'L', 'T', 'E'): {
+            if (first)
+                return stbi__err("first not IHDR", "Corrupt PNG");
+            if (c.length > 256 * 3)
+                return stbi__err("invalid PLTE", "Corrupt PNG");
+            pal_len = c.length / 3;
+            if (pal_len * 3 != c.length)
+                return stbi__err("invalid PLTE", "Corrupt PNG");
+            for (i = 0; i < pal_len; ++i) {
+                palette[i * 4 + 0] = stbi__get8(s);
+                palette[i * 4 + 1] = stbi__get8(s);
+                palette[i * 4 + 2] = stbi__get8(s);
+                palette[i * 4 + 3] = 255;
+            }
+            break;
+        }
+
+        case STBI__PNG_TYPE('t', 'R', 'N', 'S'): {
+            if (first)
+                return stbi__err("first not IHDR", "Corrupt PNG");
+            if (z->idata)
+                return stbi__err("tRNS after IDAT", "Corrupt PNG");
+            if (pal_img_n) {
+                if (scan == STBI__SCAN_header) {
+                    s->img_n = 4;
+                    return 1;
+                }
+                if (pal_len == 0)
+                    return stbi__err("tRNS before PLTE", "Corrupt PNG");
+                if (c.length > pal_len)
+                    return stbi__err("bad tRNS len", "Corrupt PNG");
+                pal_img_n = 4;
+                for (i = 0; i < c.length; ++i)
+                    palette[i * 4 + 3] = stbi__get8(s);
+            }
+            else {
+                if (!(s->img_n & 1))
+                    return stbi__err("tRNS with alpha", "Corrupt PNG");
+                if (c.length != (stbi__uint32)s->img_n * 2)
+                    return stbi__err("bad tRNS len", "Corrupt PNG");
+                has_trans = 1;
+                if (z->depth == 16) {
+                    for (k = 0; k < s->img_n; ++k)
+                        tc16[k] = (stbi__uint16)stbi__get16be(
+                            s); // copy the values as-is
+                }
+                else {
+                    for (k = 0; k < s->img_n; ++k)
+                        tc[k] =
+                            (stbi_uc)(stbi__get16be(s) & 255) *
+                            stbi__depth_scale_table
+                                [z->depth]; // non 8-bit images will be larger
+                }
+            }
+            break;
+        }
+
+        case STBI__PNG_TYPE('I', 'D', 'A', 'T'): {
+            if (first)
+                return stbi__err("first not IHDR", "Corrupt PNG");
+            if (pal_img_n && !pal_len)
+                return stbi__err("no PLTE", "Corrupt PNG");
+            if (scan == STBI__SCAN_header) {
+                s->img_n = pal_img_n;
+                return 1;
+            }
+            if ((int)(ioff + c.length) < (int)ioff)
+                return 0;
+            if (ioff + c.length > idata_limit) {
+                stbi__uint32 idata_limit_old = idata_limit;
+                stbi_uc* p;
+                if (idata_limit == 0)
+                    idata_limit = c.length > 4096 ? c.length : 4096;
+                while (ioff + c.length > idata_limit)
+                    idata_limit *= 2;
+                STBI_NOTUSED(idata_limit_old);
+                p = (stbi_uc*)STBI_REALLOC_SIZED(z->idata, idata_limit_old,
+                                                 idata_limit);
+                if (p == NULL)
+                    return stbi__err("outofmem", "Out of memory");
+                z->idata = p;
+            }
+            if (!stbi__getn(s, z->idata + ioff, c.length))
+                return stbi__err("outofdata", "Corrupt PNG");
+            ioff += c.length;
+            break;
+        }
+
+        case STBI__PNG_TYPE('I', 'E', 'N', 'D'): {
+            stbi__uint32 raw_len, bpl;
+            if (first)
+                return stbi__err("first not IHDR", "Corrupt PNG");
+            if (scan != STBI__SCAN_load)
+                return 1;
+            if (z->idata == NULL)
+                return stbi__err("no IDAT", "Corrupt PNG");
+            // initial guess for decoded data size to avoid unnecessary reallocs
+            bpl =
+                (s->img_x * z->depth + 7) / 8; // bytes per line, per component
+            raw_len = bpl * s->img_y * s->img_n /* pixels */ +
+                      s->img_y /* filter mode per row */;
+            z->expanded =
+                (stbi_uc*)stbi_zlib_decode_malloc_guesssize_headerflag(
+                    (char*)z->idata, ioff, raw_len, (int*)&raw_len, !is_iphone);
+            if (z->expanded == NULL)
+                return 0; // zlib should set error
+            STBI_FREE(z->idata);
+            z->idata = NULL;
+            if ((req_comp == s->img_n + 1 && req_comp != 3 && !pal_img_n) ||
+                has_trans)
+                s->img_out_n = s->img_n + 1;
+            else
+                s->img_out_n = s->img_n;
+            if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n,
+                                        z->depth, color, interlace))
+                return 0;
+            if (has_trans) {
+                if (z->depth == 16) {
+                    if (!stbi__compute_transparency16(z, tc16, s->img_out_n))
+                        return 0;
+                }
+                else {
+                    if (!stbi__compute_transparency(z, tc, s->img_out_n))
+                        return 0;
+                }
+            }
+            if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
+                stbi__de_iphone(z);
+            if (pal_img_n) {
+                // pal_img_n == 3 or 4
+                s->img_n = pal_img_n; // record the actual colors we had
+                s->img_out_n = pal_img_n;
+                if (req_comp >= 3)
+                    s->img_out_n = req_comp;
+                if (!stbi__expand_png_palette(z, palette, pal_len,
+                                              s->img_out_n))
+                    return 0;
+            }
+            else if (has_trans) {
+                // non-paletted image with tRNS -> source image has (constant)
+                // alpha
+                ++s->img_n;
+            }
+            STBI_FREE(z->expanded);
+            z->expanded = NULL;
+            return 1;
+        }
+
+        default:
+            // if critical, fail
+            if (first)
+                return stbi__err("first not IHDR", "Corrupt PNG");
+            if ((c.type & (1 << 29)) == 0) {
+#ifndef STBI_NO_FAILURE_STRINGS
+                // not threadsafe
+                static char invalid_chunk[] = "XXXX PNG chunk not known";
+                invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
+                invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
+                invalid_chunk[2] = STBI__BYTECAST(c.type >> 8);
+                invalid_chunk[3] = STBI__BYTECAST(c.type >> 0);
+#endif
+                return stbi__err(invalid_chunk,
+                                 "PNG not supported: unknown PNG chunk type");
+            }
+            stbi__skip(s, c.length);
+            break;
+        }
+        // end of PNG chunk, read and skip CRC
+        stbi__get32be(s);
+    }
+}
+
+static void* stbi__do_png(stbi__png* p, int* x, int* y, int* n, int req_comp,
+                          stbi__result_info* ri)
+{
+    void* result = NULL;
+    if (req_comp < 0 || req_comp > 4)
+        return stbi__errpuc("bad req_comp", "Internal error");
+    if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
+        if (p->depth < 8)
+            ri->bits_per_channel = 8;
+        else
+            ri->bits_per_channel = p->depth;
+        result = p->out;
+        p->out = NULL;
+        if (req_comp && req_comp != p->s->img_out_n) {
+            if (ri->bits_per_channel == 8)
+                result = stbi__convert_format((unsigned char*)result,
+                                              p->s->img_out_n, req_comp,
+                                              p->s->img_x, p->s->img_y);
+            else
+                result = stbi__convert_format16((stbi__uint16*)result,
+                                                p->s->img_out_n, req_comp,
+                                                p->s->img_x, p->s->img_y);
+            p->s->img_out_n = req_comp;
+            if (result == NULL)
+                return result;
+        }
+        *x = p->s->img_x;
+        *y = p->s->img_y;
+        if (n)
+            *n = p->s->img_n;
+    }
+    STBI_FREE(p->out);
+    p->out = NULL;
+    STBI_FREE(p->expanded);
+    p->expanded = NULL;
+    STBI_FREE(p->idata);
+    p->idata = NULL;
+
+    return result;
+}
+
+static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri)
+{
+    stbi__png p;
+    p.s = s;
+    return stbi__do_png(&p, x, y, comp, req_comp, ri);
+}
+
+static int stbi__png_test(stbi__context* s)
+{
+    int r;
+    r = stbi__check_png_header(s);
+    stbi__rewind(s);
+    return r;
+}
+
+static int stbi__png_info_raw(stbi__png* p, int* x, int* y, int* comp)
+{
+    if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
+        stbi__rewind(p->s);
+        return 0;
+    }
+    if (x)
+        *x = p->s->img_x;
+    if (y)
+        *y = p->s->img_y;
+    if (comp)
+        *comp = p->s->img_n;
+    return 1;
+}
+
+static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    stbi__png p;
+    p.s = s;
+    return stbi__png_info_raw(&p, x, y, comp);
+}
+
+static int stbi__png_is16(stbi__context* s)
+{
+    stbi__png p;
+    p.s = s;
+    if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
+        return 0;
+    if (p.depth != 16) {
+        stbi__rewind(p.s);
+        return 0;
+    }
+    return 1;
+}
+#endif
+
+// Microsoft/Windows BMP image
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_test_raw(stbi__context* s)
+{
+    int r;
+    int sz;
+    if (stbi__get8(s) != 'B')
+        return 0;
+    if (stbi__get8(s) != 'M')
+        return 0;
+    stbi__get32le(s); // discard filesize
+    stbi__get16le(s); // discard reserved
+    stbi__get16le(s); // discard reserved
+    stbi__get32le(s); // discard data offset
+    sz = stbi__get32le(s);
+    r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
+    return r;
+}
+
+static int stbi__bmp_test(stbi__context* s)
+{
+    int r = stbi__bmp_test_raw(s);
+    stbi__rewind(s);
+    return r;
+}
+
+// returns 0..31 for the highest set bit
+static int stbi__high_bit(unsigned int z)
+{
+    int n = 0;
+    if (z == 0)
+        return -1;
+    if (z >= 0x10000) {
+        n += 16;
+        z >>= 16;
+    }
+    if (z >= 0x00100) {
+        n += 8;
+        z >>= 8;
+    }
+    if (z >= 0x00010) {
+        n += 4;
+        z >>= 4;
+    }
+    if (z >= 0x00004) {
+        n += 2;
+        z >>= 2;
+    }
+    if (z >= 0x00002) {
+        n += 1;
+        z >>= 1;
+    }
+    return n;
+}
+
+static int stbi__bitcount(unsigned int a)
+{
+    a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2
+    a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4
+    a = (a + (a >> 4)) & 0x0f0f0f0f;                // max 8 per 4, now 8 bits
+    a = (a + (a >> 8));                             // max 16 per 8 bits
+    a = (a + (a >> 16));                            // max 32 per 8 bits
+    return a & 0xff;
+}
+
+// extract an arbitrarily-aligned N-bit value (N=bits)
+// from v, and then make it 8-bits long and fractionally
+// extend it to full full range.
+static int stbi__shiftsigned(unsigned int v, int shift, int bits)
+{
+    static unsigned int mul_table[9] = {
+        0,
+        0xff /*0b11111111*/,
+        0x55 /*0b01010101*/,
+        0x49 /*0b01001001*/,
+        0x11 /*0b00010001*/,
+        0x21 /*0b00100001*/,
+        0x41 /*0b01000001*/,
+        0x81 /*0b10000001*/,
+        0x01 /*0b00000001*/,
+    };
+    static unsigned int shift_table[9] = {
+        0, 0, 0, 1, 0, 2, 4, 6, 0,
+    };
+    if (shift < 0)
+        v <<= -shift;
+    else
+        v >>= shift;
+    STBI_ASSERT(v >= 0 && v < 256);
+    v >>= (8 - bits);
+    STBI_ASSERT(bits >= 0 && bits <= 8);
+    return (int)((unsigned)v * mul_table[bits]) >> shift_table[bits];
+}
+
+typedef struct {
+    int bpp, offset, hsz;
+    unsigned int mr, mg, mb, ma, all_a;
+} stbi__bmp_data;
+
+static void* stbi__bmp_parse_header(stbi__context* s, stbi__bmp_data* info)
+{
+    int hsz;
+    if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M')
+        return stbi__errpuc("not BMP", "Corrupt BMP");
+    stbi__get32le(s); // discard filesize
+    stbi__get16le(s); // discard reserved
+    stbi__get16le(s); // discard reserved
+    info->offset = stbi__get32le(s);
+    info->hsz = hsz = stbi__get32le(s);
+    info->mr = info->mg = info->mb = info->ma = 0;
+
+    if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124)
+        return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
+    if (hsz == 12) {
+        s->img_x = stbi__get16le(s);
+        s->img_y = stbi__get16le(s);
+    }
+    else {
+        s->img_x = stbi__get32le(s);
+        s->img_y = stbi__get32le(s);
+    }
+    if (stbi__get16le(s) != 1)
+        return stbi__errpuc("bad BMP", "bad BMP");
+    info->bpp = stbi__get16le(s);
+    if (hsz != 12) {
+        int compress = stbi__get32le(s);
+        if (compress == 1 || compress == 2)
+            return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
+        stbi__get32le(s); // discard sizeof
+        stbi__get32le(s); // discard hres
+        stbi__get32le(s); // discard vres
+        stbi__get32le(s); // discard colorsused
+        stbi__get32le(s); // discard max important
+        if (hsz == 40 || hsz == 56) {
+            if (hsz == 56) {
+                stbi__get32le(s);
+                stbi__get32le(s);
+                stbi__get32le(s);
+                stbi__get32le(s);
+            }
+            if (info->bpp == 16 || info->bpp == 32) {
+                if (compress == 0) {
+                    if (info->bpp == 32) {
+                        info->mr = 0xffu << 16;
+                        info->mg = 0xffu << 8;
+                        info->mb = 0xffu << 0;
+                        info->ma = 0xffu << 24;
+                        info->all_a = 0; // if all_a is 0 at end, then we loaded
+                                         // alpha channel but it was all 0
+                    }
+                    else {
+                        info->mr = 31u << 10;
+                        info->mg = 31u << 5;
+                        info->mb = 31u << 0;
+                    }
+                }
+                else if (compress == 3) {
+                    info->mr = stbi__get32le(s);
+                    info->mg = stbi__get32le(s);
+                    info->mb = stbi__get32le(s);
+                    // not documented, but generated by photoshop and handled by
+                    // mspaint
+                    if (info->mr == info->mg && info->mg == info->mb) {
+                        // ?!?!?
+                        return stbi__errpuc("bad BMP", "bad BMP");
+                    }
+                }
+                else
+                    return stbi__errpuc("bad BMP", "bad BMP");
+            }
+        }
+        else {
+            int i;
+            if (hsz != 108 && hsz != 124)
+                return stbi__errpuc("bad BMP", "bad BMP");
+            info->mr = stbi__get32le(s);
+            info->mg = stbi__get32le(s);
+            info->mb = stbi__get32le(s);
+            info->ma = stbi__get32le(s);
+            stbi__get32le(s); // discard color space
+            for (i = 0; i < 12; ++i)
+                stbi__get32le(s); // discard color space parameters
+            if (hsz == 124) {
+                stbi__get32le(s); // discard rendering intent
+                stbi__get32le(s); // discard offset of profile data
+                stbi__get32le(s); // discard size of profile data
+                stbi__get32le(s); // discard reserved
+            }
+        }
+    }
+    return (void*)1;
+}
+
+static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri)
+{
+    stbi_uc* out;
+    unsigned int mr = 0, mg = 0, mb = 0, ma = 0, all_a;
+    stbi_uc pal[256][4];
+    int psize = 0, i, j, width;
+    int flip_vertically, pad, target;
+    stbi__bmp_data info;
+    STBI_NOTUSED(ri);
+
+    info.all_a = 255;
+    if (stbi__bmp_parse_header(s, &info) == NULL)
+        return NULL; // error code already set
+
+    flip_vertically = ((int)s->img_y) > 0;
+    s->img_y = abs((int)s->img_y);
+
+    mr = info.mr;
+    mg = info.mg;
+    mb = info.mb;
+    ma = info.ma;
+    all_a = info.all_a;
+
+    if (info.hsz == 12) {
+        if (info.bpp < 24)
+            psize = (info.offset - 14 - 24) / 3;
+    }
+    else {
+        if (info.bpp < 16)
+            psize = (info.offset - 14 - info.hsz) >> 2;
+    }
+
+    s->img_n = ma ? 4 : 3;
+    if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
+        target = req_comp;
+    else
+        target = s->img_n; // if they want monochrome, we'll post-convert
+
+    // sanity-check size
+    if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
+        return stbi__errpuc("too large", "Corrupt BMP");
+
+    out = (stbi_uc*)stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
+    if (!out)
+        return stbi__errpuc("outofmem", "Out of memory");
+    if (info.bpp < 16) {
+        int z = 0;
+        if (psize == 0 || psize > 256) {
+            STBI_FREE(out);
+            return stbi__errpuc("invalid", "Corrupt BMP");
+        }
+        for (i = 0; i < psize; ++i) {
+            pal[i][2] = stbi__get8(s);
+            pal[i][1] = stbi__get8(s);
+            pal[i][0] = stbi__get8(s);
+            if (info.hsz != 12)
+                stbi__get8(s);
+            pal[i][3] = 255;
+        }
+        stbi__skip(s, info.offset - 14 - info.hsz -
+                          psize * (info.hsz == 12 ? 3 : 4));
+        if (info.bpp == 1)
+            width = (s->img_x + 7) >> 3;
+        else if (info.bpp == 4)
+            width = (s->img_x + 1) >> 1;
+        else if (info.bpp == 8)
+            width = s->img_x;
+        else {
+            STBI_FREE(out);
+            return stbi__errpuc("bad bpp", "Corrupt BMP");
+        }
+        pad = (-width) & 3;
+        if (info.bpp == 1) {
+            for (j = 0; j < (int)s->img_y; ++j) {
+                int bit_offset = 7, v = stbi__get8(s);
+                for (i = 0; i < (int)s->img_x; ++i) {
+                    int color = (v >> bit_offset) & 0x1;
+                    out[z++] = pal[color][0];
+                    out[z++] = pal[color][1];
+                    out[z++] = pal[color][2];
+                    if (target == 4)
+                        out[z++] = 255;
+                    if (i + 1 == (int)s->img_x)
+                        break;
+                    if ((--bit_offset) < 0) {
+                        bit_offset = 7;
+                        v = stbi__get8(s);
+                    }
+                }
+                stbi__skip(s, pad);
+            }
+        }
+        else {
+            for (j = 0; j < (int)s->img_y; ++j) {
+                for (i = 0; i < (int)s->img_x; i += 2) {
+                    int v = stbi__get8(s), v2 = 0;
+                    if (info.bpp == 4) {
+                        v2 = v & 15;
+                        v >>= 4;
+                    }
+                    out[z++] = pal[v][0];
+                    out[z++] = pal[v][1];
+                    out[z++] = pal[v][2];
+                    if (target == 4)
+                        out[z++] = 255;
+                    if (i + 1 == (int)s->img_x)
+                        break;
+                    v = (info.bpp == 8) ? stbi__get8(s) : v2;
+                    out[z++] = pal[v][0];
+                    out[z++] = pal[v][1];
+                    out[z++] = pal[v][2];
+                    if (target == 4)
+                        out[z++] = 255;
+                }
+                stbi__skip(s, pad);
+            }
+        }
+    }
+    else {
+        int rshift = 0, gshift = 0, bshift = 0, ashift = 0, rcount = 0,
+            gcount = 0, bcount = 0, acount = 0;
+        int z = 0;
+        int easy = 0;
+        stbi__skip(s, info.offset - 14 - info.hsz);
+        if (info.bpp == 24)
+            width = 3 * s->img_x;
+        else if (info.bpp == 16)
+            width = 2 * s->img_x;
+        else /* bpp = 32 and pad = 0 */
+            width = 0;
+        pad = (-width) & 3;
+        if (info.bpp == 24) {
+            easy = 1;
+        }
+        else if (info.bpp == 32) {
+            if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 &&
+                ma == 0xff000000)
+                easy = 2;
+        }
+        if (!easy) {
+            if (!mr || !mg || !mb) {
+                STBI_FREE(out);
+                return stbi__errpuc("bad masks", "Corrupt BMP");
+            }
+            // right shift amt to put high bit in position #7
+            rshift = stbi__high_bit(mr) - 7;
+            rcount = stbi__bitcount(mr);
+            gshift = stbi__high_bit(mg) - 7;
+            gcount = stbi__bitcount(mg);
+            bshift = stbi__high_bit(mb) - 7;
+            bcount = stbi__bitcount(mb);
+            ashift = stbi__high_bit(ma) - 7;
+            acount = stbi__bitcount(ma);
+        }
+        for (j = 0; j < (int)s->img_y; ++j) {
+            if (easy) {
+                for (i = 0; i < (int)s->img_x; ++i) {
+                    unsigned char a;
+                    out[z + 2] = stbi__get8(s);
+                    out[z + 1] = stbi__get8(s);
+                    out[z + 0] = stbi__get8(s);
+                    z += 3;
+                    a = (easy == 2 ? stbi__get8(s) : 255);
+                    all_a |= a;
+                    if (target == 4)
+                        out[z++] = a;
+                }
+            }
+            else {
+                int bpp = info.bpp;
+                for (i = 0; i < (int)s->img_x; ++i) {
+                    stbi__uint32 v = (bpp == 16 ? (stbi__uint32)stbi__get16le(s)
+                                                : stbi__get32le(s));
+                    unsigned int a;
+                    out[z++] = STBI__BYTECAST(
+                        stbi__shiftsigned(v & mr, rshift, rcount));
+                    out[z++] = STBI__BYTECAST(
+                        stbi__shiftsigned(v & mg, gshift, gcount));
+                    out[z++] = STBI__BYTECAST(
+                        stbi__shiftsigned(v & mb, bshift, bcount));
+                    a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
+                    all_a |= a;
+                    if (target == 4)
+                        out[z++] = STBI__BYTECAST(a);
+                }
+            }
+            stbi__skip(s, pad);
+        }
+    }
+
+    // if alpha channel is all 0s, replace with all 255s
+    if (target == 4 && all_a == 0)
+        for (i = 4 * s->img_x * s->img_y - 1; i >= 0; i -= 4)
+            out[i] = 255;
+
+    if (flip_vertically) {
+        stbi_uc t;
+        for (j = 0; j < (int)s->img_y >> 1; ++j) {
+            stbi_uc* p1 = out + j * s->img_x * target;
+            stbi_uc* p2 = out + (s->img_y - 1 - j) * s->img_x * target;
+            for (i = 0; i < (int)s->img_x * target; ++i) {
+                t = p1[i];
+                p1[i] = p2[i];
+                p2[i] = t;
+            }
+        }
+    }
+
+    if (req_comp && req_comp != target) {
+        out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
+        if (out == NULL)
+            return out; // stbi__convert_format frees input on failure
+    }
+
+    *x = s->img_x;
+    *y = s->img_y;
+    if (comp)
+        *comp = s->img_n;
+    return out;
+}
+#endif
+
+// Targa Truevision - TGA
+// by Jonathan Dummer
+#ifndef STBI_NO_TGA
+// returns STBI_rgb or whatever, 0 on error
+static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16)
+{
+    // only RGB or RGBA (incl. 16bit) or grey allowed
+    if (is_rgb16)
+        *is_rgb16 = 0;
+    switch (bits_per_pixel) {
+    case 8:
+        return STBI_grey;
+    case 16:
+        if (is_grey)
+            return STBI_grey_alpha;
+        // fallthrough
+    case 15:
+        if (is_rgb16)
+            *is_rgb16 = 1;
+        return STBI_rgb;
+    case 24: // fallthrough
+    case 32:
+        return bits_per_pixel / 8;
+    default:
+        return 0;
+    }
+}
+
+static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel,
+        tga_colormap_bpp;
+    int sz, tga_colormap_type;
+    stbi__get8(s);                     // discard Offset
+    tga_colormap_type = stbi__get8(s); // colormap type
+    if (tga_colormap_type > 1) {
+        stbi__rewind(s);
+        return 0; // only RGB or indexed allowed
+    }
+    tga_image_type = stbi__get8(s); // image type
+    if (tga_colormap_type == 1) {   // colormapped (paletted) image
+        if (tga_image_type != 1 && tga_image_type != 9) {
+            stbi__rewind(s);
+            return 0;
+        }
+        stbi__skip(
+            s, 4); // skip index of first colormap entry and number of entries
+        sz = stbi__get8(s); //   check bits per palette color entry
+        if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) {
+            stbi__rewind(s);
+            return 0;
+        }
+        stbi__skip(s, 4); // skip image x and y origin
+        tga_colormap_bpp = sz;
+    }
+    else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
+        if ((tga_image_type != 2) && (tga_image_type != 3) &&
+            (tga_image_type != 10) && (tga_image_type != 11)) {
+            stbi__rewind(s);
+            return 0; // only RGB or grey allowed, +/- RLE
+        }
+        stbi__skip(s, 9); // skip colormap specification and image x/y origin
+        tga_colormap_bpp = 0;
+    }
+    tga_w = stbi__get16le(s);
+    if (tga_w < 1) {
+        stbi__rewind(s);
+        return 0; // test width
+    }
+    tga_h = stbi__get16le(s);
+    if (tga_h < 1) {
+        stbi__rewind(s);
+        return 0; // test height
+    }
+    tga_bits_per_pixel = stbi__get8(s); // bits per pixel
+    stbi__get8(s);                      // ignore alpha bits
+    if (tga_colormap_bpp != 0) {
+        if ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
+            // when using a colormap, tga_bits_per_pixel is the size of the
+            // indexes I don't think anything but 8 or 16bit indexes makes sense
+            stbi__rewind(s);
+            return 0;
+        }
+        tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
+    }
+    else {
+        tga_comp = stbi__tga_get_comp(
+            tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11),
+            NULL);
+    }
+    if (!tga_comp) {
+        stbi__rewind(s);
+        return 0;
+    }
+    if (x)
+        *x = tga_w;
+    if (y)
+        *y = tga_h;
+    if (comp)
+        *comp = tga_comp;
+    return 1; // seems to have passed everything
+}
+
+static int stbi__tga_test(stbi__context* s)
+{
+    int res = 0;
+    int sz, tga_color_type;
+    stbi__get8(s);                  //   discard Offset
+    tga_color_type = stbi__get8(s); //   color type
+    if (tga_color_type > 1)
+        goto errorEnd;         //   only RGB or indexed allowed
+    sz = stbi__get8(s);        //   image type
+    if (tga_color_type == 1) { // colormapped (paletted) image
+        if (sz != 1 && sz != 9)
+            goto errorEnd; // colortype 1 demands image type 1 or 9
+        stbi__skip(
+            s, 4); // skip index of first colormap entry and number of entries
+        sz = stbi__get8(s); //   check bits per palette color entry
+        if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32))
+            goto errorEnd;
+        stbi__skip(s, 4); // skip image x and y origin
+    }
+    else { // "normal" image w/o colormap
+        if ((sz != 2) && (sz != 3) && (sz != 10) && (sz != 11))
+            goto errorEnd; // only RGB or grey allowed, +/- RLE
+        stbi__skip(s, 9);  // skip colormap specification and image x/y origin
+    }
+    if (stbi__get16le(s) < 1)
+        goto errorEnd; //   test width
+    if (stbi__get16le(s) < 1)
+        goto errorEnd;  //   test height
+    sz = stbi__get8(s); //   bits per pixel
+    if ((tga_color_type == 1) && (sz != 8) && (sz != 16))
+        goto errorEnd; // for colormapped images, bpp is size of an index
+    if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32))
+        goto errorEnd;
+
+    res = 1; // if we got this far, everything's good and we can return 1
+             // instead of 0
+
+errorEnd:
+    stbi__rewind(s);
+    return res;
+}
+
+// read 16bit value and convert to 24bit RGB
+static void stbi__tga_read_rgb16(stbi__context* s, stbi_uc* out)
+{
+    stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
+    stbi__uint16 fiveBitMask = 31;
+    // we have 3 channels with 5bits each
+    int r = (px >> 10) & fiveBitMask;
+    int g = (px >> 5) & fiveBitMask;
+    int b = px & fiveBitMask;
+    // Note that this saves the data in RGB(A) order, so it doesn't need to be
+    // swapped later
+    out[0] = (stbi_uc)((r * 255) / 31);
+    out[1] = (stbi_uc)((g * 255) / 31);
+    out[2] = (stbi_uc)((b * 255) / 31);
+
+    // some people claim that the most significant bit might be used for alpha
+    // (possibly if an alpha-bit is set in the "image descriptor byte")
+    // but that only made 16bit test images completely translucent..
+    // so let's treat all 15 and 16bit TGAs as RGB with no alpha.
+}
+
+static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri)
+{
+    //   read in the TGA header stuff
+    int tga_offset = stbi__get8(s);
+    int tga_indexed = stbi__get8(s);
+    int tga_image_type = stbi__get8(s);
+    int tga_is_RLE = 0;
+    int tga_palette_start = stbi__get16le(s);
+    int tga_palette_len = stbi__get16le(s);
+    int tga_palette_bits = stbi__get8(s);
+    int tga_x_origin = stbi__get16le(s);
+    int tga_y_origin = stbi__get16le(s);
+    int tga_width = stbi__get16le(s);
+    int tga_height = stbi__get16le(s);
+    int tga_bits_per_pixel = stbi__get8(s);
+    int tga_comp, tga_rgb16 = 0;
+    int tga_inverted = stbi__get8(s);
+    // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused
+    // (useless?)
+    //   image data
+    unsigned char* tga_data;
+    unsigned char* tga_palette = NULL;
+    int i, j;
+    unsigned char raw_data[4] = {0};
+    int RLE_count = 0;
+    int RLE_repeating = 0;
+    int read_next_pixel = 1;
+    STBI_NOTUSED(ri);
+
+    //   do a tiny bit of precessing
+    if (tga_image_type >= 8) {
+        tga_image_type -= 8;
+        tga_is_RLE = 1;
+    }
+    tga_inverted = 1 - ((tga_inverted >> 5) & 1);
+
+    //   If I'm paletted, then I'll use the number of bits from the palette
+    if (tga_indexed)
+        tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
+    else
+        tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3),
+                                      &tga_rgb16);
+
+    if (!tga_comp) // shouldn't really happen, stbi__tga_test() should have
+                   // ensured basic consistency
+        return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
+
+    //   tga info
+    *x = tga_width;
+    *y = tga_height;
+    if (comp)
+        *comp = tga_comp;
+
+    if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
+        return stbi__errpuc("too large", "Corrupt TGA");
+
+    tga_data =
+        (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
+    if (!tga_data)
+        return stbi__errpuc("outofmem", "Out of memory");
+
+    // skip to the data's starting position (offset usually = 0)
+    stbi__skip(s, tga_offset);
+
+    if (!tga_indexed && !tga_is_RLE && !tga_rgb16) {
+        for (i = 0; i < tga_height; ++i) {
+            int row = tga_inverted ? tga_height - i - 1 : i;
+            stbi_uc* tga_row = tga_data + row * tga_width * tga_comp;
+            stbi__getn(s, tga_row, tga_width * tga_comp);
+        }
+    }
+    else {
+        //   do I need to load a palette?
+        if (tga_indexed) {
+            //   any data to skip? (offset usually = 0)
+            stbi__skip(s, tga_palette_start);
+            //   load the palette
+            tga_palette =
+                (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
+            if (!tga_palette) {
+                STBI_FREE(tga_data);
+                return stbi__errpuc("outofmem", "Out of memory");
+            }
+            if (tga_rgb16) {
+                stbi_uc* pal_entry = tga_palette;
+                STBI_ASSERT(tga_comp == STBI_rgb);
+                for (i = 0; i < tga_palette_len; ++i) {
+                    stbi__tga_read_rgb16(s, pal_entry);
+                    pal_entry += tga_comp;
+                }
+            }
+            else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
+                STBI_FREE(tga_data);
+                STBI_FREE(tga_palette);
+                return stbi__errpuc("bad palette", "Corrupt TGA");
+            }
+        }
+        //   load the data
+        for (i = 0; i < tga_width * tga_height; ++i) {
+            //   if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
+            if (tga_is_RLE) {
+                if (RLE_count == 0) {
+                    //   yep, get the next byte as a RLE command
+                    int RLE_cmd = stbi__get8(s);
+                    RLE_count = 1 + (RLE_cmd & 127);
+                    RLE_repeating = RLE_cmd >> 7;
+                    read_next_pixel = 1;
+                }
+                else if (!RLE_repeating) {
+                    read_next_pixel = 1;
+                }
+            }
+            else {
+                read_next_pixel = 1;
+            }
+            //   OK, if I need to read a pixel, do it now
+            if (read_next_pixel) {
+                //   load however much data we did have
+                if (tga_indexed) {
+                    // read in index, then perform the lookup
+                    int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s)
+                                                            : stbi__get16le(s);
+                    if (pal_idx >= tga_palette_len) {
+                        // invalid index
+                        pal_idx = 0;
+                    }
+                    pal_idx *= tga_comp;
+                    for (j = 0; j < tga_comp; ++j) {
+                        raw_data[j] = tga_palette[pal_idx + j];
+                    }
+                }
+                else if (tga_rgb16) {
+                    STBI_ASSERT(tga_comp == STBI_rgb);
+                    stbi__tga_read_rgb16(s, raw_data);
+                }
+                else {
+                    //   read in the data raw
+                    for (j = 0; j < tga_comp; ++j) {
+                        raw_data[j] = stbi__get8(s);
+                    }
+                }
+                //   clear the reading flag for the next pixel
+                read_next_pixel = 0;
+            } // end of reading a pixel
+
+            // copy data
+            for (j = 0; j < tga_comp; ++j)
+                tga_data[i * tga_comp + j] = raw_data[j];
+
+            //   in case we're in RLE mode, keep counting down
+            --RLE_count;
+        }
+        //   do I need to invert the image?
+        if (tga_inverted) {
+            for (j = 0; j * 2 < tga_height; ++j) {
+                int index1 = j * tga_width * tga_comp;
+                int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
+                for (i = tga_width * tga_comp; i > 0; --i) {
+                    unsigned char temp = tga_data[index1];
+                    tga_data[index1] = tga_data[index2];
+                    tga_data[index2] = temp;
+                    ++index1;
+                    ++index2;
+                }
+            }
+        }
+        //   clear my palette, if I had one
+        if (tga_palette != NULL) {
+            STBI_FREE(tga_palette);
+        }
+    }
+
+    // swap RGB - if the source data was RGB16, it already is in the right order
+    if (tga_comp >= 3 && !tga_rgb16) {
+        unsigned char* tga_pixel = tga_data;
+        for (i = 0; i < tga_width * tga_height; ++i) {
+            unsigned char temp = tga_pixel[0];
+            tga_pixel[0] = tga_pixel[2];
+            tga_pixel[2] = temp;
+            tga_pixel += tga_comp;
+        }
+    }
+
+    // convert to target component count
+    if (req_comp && req_comp != tga_comp)
+        tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width,
+                                        tga_height);
+
+    //   the things I do to get rid of an error message, and yet keep
+    //   Microsoft's C compilers happy... [8^(
+    tga_palette_start = tga_palette_len = tga_palette_bits = tga_x_origin =
+        tga_y_origin = 0;
+    //   OK, done
+    return tga_data;
+}
+#endif
+
+// *************************************************************************************************
+// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz,
+// tweaked by STB
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_test(stbi__context* s)
+{
+    int r = (stbi__get32be(s) == 0x38425053);
+    stbi__rewind(s);
+    return r;
+}
+
+static int stbi__psd_decode_rle(stbi__context* s, stbi_uc* p, int pixelCount)
+{
+    int count, nleft, len;
+
+    count = 0;
+    while ((nleft = pixelCount - count) > 0) {
+        len = stbi__get8(s);
+        if (len == 128) {
+            // No-op.
+        }
+        else if (len < 128) {
+            // Copy next len+1 bytes literally.
+            len++;
+            if (len > nleft)
+                return 0; // corrupt data
+            count += len;
+            while (len) {
+                *p = stbi__get8(s);
+                p += 4;
+                len--;
+            }
+        }
+        else if (len > 128) {
+            stbi_uc val;
+            // Next -len+1 bytes in the dest are replicated from next source
+            // byte. (Interpret len as a negative 8-bit int.)
+            len = 257 - len;
+            if (len > nleft)
+                return 0; // corrupt data
+            val = stbi__get8(s);
+            count += len;
+            while (len) {
+                *p = val;
+                p += 4;
+                len--;
+            }
+        }
+    }
+
+    return 1;
+}
+
+static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri, int bpc)
+{
+    int pixelCount;
+    int channelCount, compression;
+    int channel, i;
+    int bitdepth;
+    int w, h;
+    stbi_uc* out;
+    STBI_NOTUSED(ri);
+
+    // Check identifier
+    if (stbi__get32be(s) != 0x38425053) // "8BPS"
+        return stbi__errpuc("not PSD", "Corrupt PSD image");
+
+    // Check file type version.
+    if (stbi__get16be(s) != 1)
+        return stbi__errpuc("wrong version",
+                            "Unsupported version of PSD image");
+
+    // Skip 6 reserved bytes.
+    stbi__skip(s, 6);
+
+    // Read the number of channels (R, G, B, A, etc).
+    channelCount = stbi__get16be(s);
+    if (channelCount < 0 || channelCount > 16)
+        return stbi__errpuc("wrong channel count",
+                            "Unsupported number of channels in PSD image");
+
+    // Read the rows and columns of the image.
+    h = stbi__get32be(s);
+    w = stbi__get32be(s);
+
+    // Make sure the depth is 8 bits.
+    bitdepth = stbi__get16be(s);
+    if (bitdepth != 8 && bitdepth != 16)
+        return stbi__errpuc("unsupported bit depth",
+                            "PSD bit depth is not 8 or 16 bit");
+
+    // Make sure the color mode is RGB.
+    // Valid options are:
+    //   0: Bitmap
+    //   1: Grayscale
+    //   2: Indexed color
+    //   3: RGB color
+    //   4: CMYK color
+    //   7: Multichannel
+    //   8: Duotone
+    //   9: Lab color
+    if (stbi__get16be(s) != 3)
+        return stbi__errpuc("wrong color format",
+                            "PSD is not in RGB color format");
+
+    // Skip the Mode Data.  (It's the palette for indexed color; other info for
+    // other modes.)
+    stbi__skip(s, stbi__get32be(s));
+
+    // Skip the image resources.  (resolution, pen tool paths, etc)
+    stbi__skip(s, stbi__get32be(s));
+
+    // Skip the reserved data.
+    stbi__skip(s, stbi__get32be(s));
+
+    // Find out if the data is compressed.
+    // Known values:
+    //   0: no compression
+    //   1: RLE compressed
+    compression = stbi__get16be(s);
+    if (compression > 1)
+        return stbi__errpuc("bad compression",
+                            "PSD has an unknown compression format");
+
+    // Check size
+    if (!stbi__mad3sizes_valid(4, w, h, 0))
+        return stbi__errpuc("too large", "Corrupt PSD");
+
+    // Create the destination image.
+
+    if (!compression && bitdepth == 16 && bpc == 16) {
+        out = (stbi_uc*)stbi__malloc_mad3(8, w, h, 0);
+        ri->bits_per_channel = 16;
+    }
+    else
+        out = (stbi_uc*)stbi__malloc(4 * w * h);
+
+    if (!out)
+        return stbi__errpuc("outofmem", "Out of memory");
+    pixelCount = w * h;
+
+    // Initialize the data to zero.
+    // memset( out, 0, pixelCount * 4 );
+
+    // Finally, the image data.
+    if (compression) {
+        // RLE as used by .PSD and .TIFF
+        // Loop until you get the number of unpacked bytes you are expecting:
+        //     Read the next source byte into n.
+        //     If n is between 0 and 127 inclusive, copy the next n+1 bytes
+        //     literally. Else if n is between -127 and -1 inclusive, copy the
+        //     next byte -n+1 times. Else if n is 128, noop.
+        // Endloop
+
+        // The RLE-compressed data is preceded by a 2-byte data count for each
+        // row in the data, which we're going to just skip.
+        stbi__skip(s, h * channelCount * 2);
+
+        // Read the RLE data by channel.
+        for (channel = 0; channel < 4; channel++) {
+            stbi_uc* p;
+
+            p = out + channel;
+            if (channel >= channelCount) {
+                // Fill this channel with default data.
+                for (i = 0; i < pixelCount; i++, p += 4)
+                    *p = (channel == 3 ? 255 : 0);
+            }
+            else {
+                // Read the RLE data.
+                if (!stbi__psd_decode_rle(s, p, pixelCount)) {
+                    STBI_FREE(out);
+                    return stbi__errpuc("corrupt", "bad RLE data");
+                }
+            }
+        }
+    }
+    else {
+        // We're at the raw image data.  It's each channel in order (Red, Green,
+        // Blue, Alpha, ...) where each channel consists of an 8-bit (or 16-bit)
+        // value for each pixel in the image.
+
+        // Read the data by channel.
+        for (channel = 0; channel < 4; channel++) {
+            if (channel >= channelCount) {
+                // Fill this channel with default data.
+                if (bitdepth == 16 && bpc == 16) {
+                    stbi__uint16* q = ((stbi__uint16*)out) + channel;
+                    stbi__uint16 val = channel == 3 ? 65535 : 0;
+                    for (i = 0; i < pixelCount; i++, q += 4)
+                        *q = val;
+                }
+                else {
+                    stbi_uc* p = out + channel;
+                    stbi_uc val = channel == 3 ? 255 : 0;
+                    for (i = 0; i < pixelCount; i++, p += 4)
+                        *p = val;
+                }
+            }
+            else {
+                if (ri->bits_per_channel == 16) { // output bpc
+                    stbi__uint16* q = ((stbi__uint16*)out) + channel;
+                    for (i = 0; i < pixelCount; i++, q += 4)
+                        *q = (stbi__uint16)stbi__get16be(s);
+                }
+                else {
+                    stbi_uc* p = out + channel;
+                    if (bitdepth == 16) { // input bpc
+                        for (i = 0; i < pixelCount; i++, p += 4)
+                            *p = (stbi_uc)(stbi__get16be(s) >> 8);
+                    }
+                    else {
+                        for (i = 0; i < pixelCount; i++, p += 4)
+                            *p = stbi__get8(s);
+                    }
+                }
+            }
+        }
+    }
+
+    // remove weird white matte from PSD
+    if (channelCount >= 4) {
+        if (ri->bits_per_channel == 16) {
+            for (i = 0; i < w * h; ++i) {
+                stbi__uint16* pixel = (stbi__uint16*)out + 4 * i;
+                if (pixel[3] != 0 && pixel[3] != 65535) {
+                    float a = pixel[3] / 65535.0f;
+                    float ra = 1.0f / a;
+                    float inv_a = 65535.0f * (1 - ra);
+                    pixel[0] = (stbi__uint16)(pixel[0] * ra + inv_a);
+                    pixel[1] = (stbi__uint16)(pixel[1] * ra + inv_a);
+                    pixel[2] = (stbi__uint16)(pixel[2] * ra + inv_a);
+                }
+            }
+        }
+        else {
+            for (i = 0; i < w * h; ++i) {
+                unsigned char* pixel = out + 4 * i;
+                if (pixel[3] != 0 && pixel[3] != 255) {
+                    float a = pixel[3] / 255.0f;
+                    float ra = 1.0f / a;
+                    float inv_a = 255.0f * (1 - ra);
+                    pixel[0] = (unsigned char)(pixel[0] * ra + inv_a);
+                    pixel[1] = (unsigned char)(pixel[1] * ra + inv_a);
+                    pixel[2] = (unsigned char)(pixel[2] * ra + inv_a);
+                }
+            }
+        }
+    }
+
+    // convert to desired output format
+    if (req_comp && req_comp != 4) {
+        if (ri->bits_per_channel == 16)
+            out = (stbi_uc*)stbi__convert_format16((stbi__uint16*)out, 4,
+                                                   req_comp, w, h);
+        else
+            out = stbi__convert_format(out, 4, req_comp, w, h);
+        if (out == NULL)
+            return out; // stbi__convert_format frees input on failure
+    }
+
+    if (comp)
+        *comp = 4;
+    *y = h;
+    *x = w;
+
+    return out;
+}
+#endif
+
+// *************************************************************************************************
+// Softimage PIC loader
+// by Tom Seddon
+//
+// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
+// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_is4(stbi__context* s, const char* str)
+{
+    int i;
+    for (i = 0; i < 4; ++i)
+        if (stbi__get8(s) != (stbi_uc)str[i])
+            return 0;
+
+    return 1;
+}
+
+static int stbi__pic_test_core(stbi__context* s)
+{
+    int i;
+
+    if (!stbi__pic_is4(s, "\x53\x80\xF6\x34"))
+        return 0;
+
+    for (i = 0; i < 84; ++i)
+        stbi__get8(s);
+
+    if (!stbi__pic_is4(s, "PICT"))
+        return 0;
+
+    return 1;
+}
+
+typedef struct {
+    stbi_uc size, type, channel;
+} stbi__pic_packet;
+
+static stbi_uc* stbi__readval(stbi__context* s, int channel, stbi_uc* dest)
+{
+    int mask = 0x80, i;
+
+    for (i = 0; i < 4; ++i, mask >>= 1) {
+        if (channel & mask) {
+            if (stbi__at_eof(s))
+                return stbi__errpuc("bad file", "PIC file too short");
+            dest[i] = stbi__get8(s);
+        }
+    }
+
+    return dest;
+}
+
+static void stbi__copyval(int channel, stbi_uc* dest, const stbi_uc* src)
+{
+    int mask = 0x80, i;
+
+    for (i = 0; i < 4; ++i, mask >>= 1)
+        if (channel & mask)
+            dest[i] = src[i];
+}
+
+static stbi_uc* stbi__pic_load_core(stbi__context* s, int width, int height,
+                                    int* comp, stbi_uc* result)
+{
+    int act_comp = 0, num_packets = 0, y, chained;
+    stbi__pic_packet packets[10];
+
+    // this will (should...) cater for even some bizarre stuff like having data
+    // for the same channel in multiple packets.
+    do {
+        stbi__pic_packet* packet;
+
+        if (num_packets == sizeof(packets) / sizeof(packets[0]))
+            return stbi__errpuc("bad format", "too many packets");
+
+        packet = &packets[num_packets++];
+
+        chained = stbi__get8(s);
+        packet->size = stbi__get8(s);
+        packet->type = stbi__get8(s);
+        packet->channel = stbi__get8(s);
+
+        act_comp |= packet->channel;
+
+        if (stbi__at_eof(s))
+            return stbi__errpuc("bad file", "file too short (reading packets)");
+        if (packet->size != 8)
+            return stbi__errpuc("bad format", "packet isn't 8bpp");
+    } while (chained);
+
+    *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
+
+    for (y = 0; y < height; ++y) {
+        int packet_idx;
+
+        for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) {
+            stbi__pic_packet* packet = &packets[packet_idx];
+            stbi_uc* dest = result + y * width * 4;
+
+            switch (packet->type) {
+            default:
+                return stbi__errpuc("bad format",
+                                    "packet has bad compression type");
+
+            case 0: { // uncompressed
+                int x;
+
+                for (x = 0; x < width; ++x, dest += 4)
+                    if (!stbi__readval(s, packet->channel, dest))
+                        return 0;
+                break;
+            }
+
+            case 1: // Pure RLE
+            {
+                int left = width, i;
+
+                while (left > 0) {
+                    stbi_uc count, value[4];
+
+                    count = stbi__get8(s);
+                    if (stbi__at_eof(s))
+                        return stbi__errpuc("bad file",
+                                            "file too short (pure read count)");
+
+                    if (count > left)
+                        count = (stbi_uc)left;
+
+                    if (!stbi__readval(s, packet->channel, value))
+                        return 0;
+
+                    for (i = 0; i < count; ++i, dest += 4)
+                        stbi__copyval(packet->channel, dest, value);
+                    left -= count;
+                }
+            } break;
+
+            case 2: { // Mixed RLE
+                int left = width;
+                while (left > 0) {
+                    int count = stbi__get8(s), i;
+                    if (stbi__at_eof(s))
+                        return stbi__errpuc(
+                            "bad file", "file too short (mixed read count)");
+
+                    if (count >= 128) { // Repeated
+                        stbi_uc value[4];
+
+                        if (count == 128)
+                            count = stbi__get16be(s);
+                        else
+                            count -= 127;
+                        if (count > left)
+                            return stbi__errpuc("bad file", "scanline overrun");
+
+                        if (!stbi__readval(s, packet->channel, value))
+                            return 0;
+
+                        for (i = 0; i < count; ++i, dest += 4)
+                            stbi__copyval(packet->channel, dest, value);
+                    }
+                    else { // Raw
+                        ++count;
+                        if (count > left)
+                            return stbi__errpuc("bad file", "scanline overrun");
+
+                        for (i = 0; i < count; ++i, dest += 4)
+                            if (!stbi__readval(s, packet->channel, dest))
+                                return 0;
+                    }
+                    left -= count;
+                }
+                break;
+            }
+            }
+        }
+    }
+
+    return result;
+}
+
+static void* stbi__pic_load(stbi__context* s, int* px, int* py, int* comp,
+                            int req_comp, stbi__result_info* ri)
+{
+    stbi_uc* result;
+    int i, x, y, internal_comp;
+    STBI_NOTUSED(ri);
+
+    if (!comp)
+        comp = &internal_comp;
+
+    for (i = 0; i < 92; ++i)
+        stbi__get8(s);
+
+    x = stbi__get16be(s);
+    y = stbi__get16be(s);
+    if (stbi__at_eof(s))
+        return stbi__errpuc("bad file", "file too short (pic header)");
+    if (!stbi__mad3sizes_valid(x, y, 4, 0))
+        return stbi__errpuc("too large", "PIC image too large to decode");
+
+    stbi__get32be(s); // skip `ratio'
+    stbi__get16be(s); // skip `fields'
+    stbi__get16be(s); // skip `pad'
+
+    // intermediate buffer is RGBA
+    result = (stbi_uc*)stbi__malloc_mad3(x, y, 4, 0);
+    memset(result, 0xff, x * y * 4);
+
+    if (!stbi__pic_load_core(s, x, y, comp, result)) {
+        STBI_FREE(result);
+        result = 0;
+    }
+    *px = x;
+    *py = y;
+    if (req_comp == 0)
+        req_comp = *comp;
+    result = stbi__convert_format(result, 4, req_comp, x, y);
+
+    return result;
+}
+
+static int stbi__pic_test(stbi__context* s)
+{
+    int r = stbi__pic_test_core(s);
+    stbi__rewind(s);
+    return r;
+}
+#endif
+
+// *************************************************************************************************
+// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
+
+#ifndef STBI_NO_GIF
+typedef struct {
+    stbi__int16 prefix;
+    stbi_uc first;
+    stbi_uc suffix;
+} stbi__gif_lzw;
+
+typedef struct {
+    int w, h;
+    stbi_uc* out; // output buffer (always 4 components)
+    stbi_uc*
+        background; // The current "background" as far as a gif is concerned
+    stbi_uc* history;
+    int flags, bgindex, ratio, transparent, eflags;
+    stbi_uc pal[256][4];
+    stbi_uc lpal[256][4];
+    stbi__gif_lzw codes[8192];
+    stbi_uc* color_table;
+    int parse, step;
+    int lflags;
+    int start_x, start_y;
+    int max_x, max_y;
+    int cur_x, cur_y;
+    int line_size;
+    int delay;
+} stbi__gif;
+
+static int stbi__gif_test_raw(stbi__context* s)
+{
+    int sz;
+    if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' ||
+        stbi__get8(s) != '8')
+        return 0;
+    sz = stbi__get8(s);
+    if (sz != '9' && sz != '7')
+        return 0;
+    if (stbi__get8(s) != 'a')
+        return 0;
+    return 1;
+}
+
+static int stbi__gif_test(stbi__context* s)
+{
+    int r = stbi__gif_test_raw(s);
+    stbi__rewind(s);
+    return r;
+}
+
+static void stbi__gif_parse_colortable(stbi__context* s, stbi_uc pal[256][4],
+                                       int num_entries, int transp)
+{
+    int i;
+    for (i = 0; i < num_entries; ++i) {
+        pal[i][2] = stbi__get8(s);
+        pal[i][1] = stbi__get8(s);
+        pal[i][0] = stbi__get8(s);
+        pal[i][3] = transp == i ? 0 : 255;
+    }
+}
+
+static int stbi__gif_header(stbi__context* s, stbi__gif* g, int* comp,
+                            int is_info)
+{
+    stbi_uc version;
+    if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' ||
+        stbi__get8(s) != '8')
+        return stbi__err("not GIF", "Corrupt GIF");
+
+    version = stbi__get8(s);
+    if (version != '7' && version != '9')
+        return stbi__err("not GIF", "Corrupt GIF");
+    if (stbi__get8(s) != 'a')
+        return stbi__err("not GIF", "Corrupt GIF");
+
+    stbi__g_failure_reason = "";
+    g->w = stbi__get16le(s);
+    g->h = stbi__get16le(s);
+    g->flags = stbi__get8(s);
+    g->bgindex = stbi__get8(s);
+    g->ratio = stbi__get8(s);
+    g->transparent = -1;
+
+    if (comp != 0)
+        *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the
+                   // comments
+
+    if (is_info)
+        return 1;
+
+    if (g->flags & 0x80)
+        stbi__gif_parse_colortable(s, g->pal, 2 << (g->flags & 7), -1);
+
+    return 1;
+}
+
+static int stbi__gif_info_raw(stbi__context* s, int* x, int* y, int* comp)
+{
+    stbi__gif* g = (stbi__gif*)stbi__malloc(sizeof(stbi__gif));
+    if (!stbi__gif_header(s, g, comp, 1)) {
+        STBI_FREE(g);
+        stbi__rewind(s);
+        return 0;
+    }
+    if (x)
+        *x = g->w;
+    if (y)
+        *y = g->h;
+    STBI_FREE(g);
+    return 1;
+}
+
+static void stbi__out_gif_code(stbi__gif* g, stbi__uint16 code)
+{
+    stbi_uc *p, *c;
+    int idx;
+
+    // recurse to decode the prefixes, since the linked-list is backwards,
+    // and working backwards through an interleaved image would be nasty
+    if (g->codes[code].prefix >= 0)
+        stbi__out_gif_code(g, g->codes[code].prefix);
+
+    if (g->cur_y >= g->max_y)
+        return;
+
+    idx = g->cur_x + g->cur_y;
+    p = &g->out[idx];
+    g->history[idx / 4] = 1;
+
+    c = &g->color_table[g->codes[code].suffix * 4];
+    if (c[3] > 128) { // don't render transparent pixels;
+        p[0] = c[2];
+        p[1] = c[1];
+        p[2] = c[0];
+        p[3] = c[3];
+    }
+    g->cur_x += 4;
+
+    if (g->cur_x >= g->max_x) {
+        g->cur_x = g->start_x;
+        g->cur_y += g->step;
+
+        while (g->cur_y >= g->max_y && g->parse > 0) {
+            g->step = (1 << g->parse) * g->line_size;
+            g->cur_y = g->start_y + (g->step >> 1);
+            --g->parse;
+        }
+    }
+}
+
+static stbi_uc* stbi__process_gif_raster(stbi__context* s, stbi__gif* g)
+{
+    stbi_uc lzw_cs;
+    stbi__int32 len, init_code;
+    stbi__uint32 first;
+    stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
+    stbi__gif_lzw* p;
+
+    lzw_cs = stbi__get8(s);
+    if (lzw_cs > 12)
+        return NULL;
+    clear = 1 << lzw_cs;
+    first = 1;
+    codesize = lzw_cs + 1;
+    codemask = (1 << codesize) - 1;
+    bits = 0;
+    valid_bits = 0;
+    for (init_code = 0; init_code < clear; init_code++) {
+        g->codes[init_code].prefix = -1;
+        g->codes[init_code].first = (stbi_uc)init_code;
+        g->codes[init_code].suffix = (stbi_uc)init_code;
+    }
+
+    // support no starting clear code
+    avail = clear + 2;
+    oldcode = -1;
+
+    len = 0;
+    for (;;) {
+        if (valid_bits < codesize) {
+            if (len == 0) {
+                len = stbi__get8(s); // start new block
+                if (len == 0)
+                    return g->out;
+            }
+            --len;
+            bits |= (stbi__int32)stbi__get8(s) << valid_bits;
+            valid_bits += 8;
+        }
+        else {
+            stbi__int32 code = bits & codemask;
+            bits >>= codesize;
+            valid_bits -= codesize;
+            // @OPTIMIZE: is there some way we can accelerate the non-clear
+            // path?
+            if (code == clear) { // clear code
+                codesize = lzw_cs + 1;
+                codemask = (1 << codesize) - 1;
+                avail = clear + 2;
+                oldcode = -1;
+                first = 0;
+            }
+            else if (code == clear + 1) { // end of stream code
+                stbi__skip(s, len);
+                while ((len = stbi__get8(s)) > 0)
+                    stbi__skip(s, len);
+                return g->out;
+            }
+            else if (code <= avail) {
+                if (first) {
+                    return stbi__errpuc("no clear code", "Corrupt GIF");
+                }
+
+                if (oldcode >= 0) {
+                    p = &g->codes[avail++];
+                    if (avail > 8192) {
+                        return stbi__errpuc("too many codes", "Corrupt GIF");
+                    }
+
+                    p->prefix = (stbi__int16)oldcode;
+                    p->first = g->codes[oldcode].first;
+                    p->suffix =
+                        (code == avail) ? p->first : g->codes[code].first;
+                }
+                else if (code == avail)
+                    return stbi__errpuc("illegal code in raster",
+                                        "Corrupt GIF");
+
+                stbi__out_gif_code(g, (stbi__uint16)code);
+
+                if ((avail & codemask) == 0 && avail <= 0x0FFF) {
+                    codesize++;
+                    codemask = (1 << codesize) - 1;
+                }
+
+                oldcode = code;
+            }
+            else {
+                return stbi__errpuc("illegal code in raster", "Corrupt GIF");
+            }
+        }
+    }
+}
+
+// this function is designed to support animated gifs, although stb_image
+// doesn't support it two back is the image from two frames ago, used for a very
+// specific disposal format
+static stbi_uc* stbi__gif_load_next(stbi__context* s, stbi__gif* g, int* comp,
+                                    int req_comp, stbi_uc* two_back)
+{
+    int dispose;
+    int first_frame;
+    int pi;
+    int pcount;
+    STBI_NOTUSED(req_comp);
+
+    // on first frame, any non-written pixels get the background colour
+    // (non-transparent)
+    first_frame = 0;
+    if (g->out == 0) {
+        if (!stbi__gif_header(s, g, comp, 0))
+            return 0; // stbi__g_failure_reason set by stbi__gif_header
+        g->out = (stbi_uc*)stbi__malloc(4 * g->w * g->h);
+        g->background = (stbi_uc*)stbi__malloc(4 * g->w * g->h);
+        g->history = (stbi_uc*)stbi__malloc(g->w * g->h);
+        if (g->out == 0)
+            return stbi__errpuc("outofmem", "Out of memory");
+
+        // image is treated as "transparent" at the start - ie, nothing
+        // overwrites the current background; background colour is only used for
+        // pixels that are not rendered first frame, after that "background"
+        // color refers to the color that was there the previous frame.
+        memset(g->out, 0x00, 4 * g->w * g->h);
+        memset(g->background, 0x00,
+               4 * g->w * g->h); // state of the background (starts transparent)
+        memset(g->history, 0x00,
+               g->w * g->h); // pixels that were affected previous frame
+        first_frame = 1;
+    }
+    else {
+        // second frame - how do we dispoase of the previous one?
+        dispose = (g->eflags & 0x1C) >> 2;
+        pcount = g->w * g->h;
+
+        if ((dispose == 3) && (two_back == 0)) {
+            dispose = 2; // if I don't have an image to revert back to, default
+                         // to the old background
+        }
+
+        if (dispose == 3) { // use previous graphic
+            for (pi = 0; pi < pcount; ++pi) {
+                if (g->history[pi]) {
+                    memcpy(&g->out[pi * 4], &two_back[pi * 4], 4);
+                }
+            }
+        }
+        else if (dispose == 2) {
+            // restore what was changed last frame to background before that
+            // frame;
+            for (pi = 0; pi < pcount; ++pi) {
+                if (g->history[pi]) {
+                    memcpy(&g->out[pi * 4], &g->background[pi * 4], 4);
+                }
+            }
+        }
+        else {
+            // This is a non-disposal case eithe way, so just
+            // leave the pixels as is, and they will become the new background
+            // 1: do not dispose
+            // 0:  not specified.
+        }
+
+        // background is what out is after the undoing of the previou frame;
+        memcpy(g->background, g->out, 4 * g->w * g->h);
+    }
+
+    // clear my history;
+    memset(g->history, 0x00,
+           g->w * g->h); // pixels that were affected previous frame
+
+    for (;;) {
+        int tag = stbi__get8(s);
+        switch (tag) {
+        case 0x2C: /* Image Descriptor */
+        {
+            stbi__int32 x, y, w, h;
+            stbi_uc* o;
+
+            x = stbi__get16le(s);
+            y = stbi__get16le(s);
+            w = stbi__get16le(s);
+            h = stbi__get16le(s);
+            if (((x + w) > (g->w)) || ((y + h) > (g->h)))
+                return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
+
+            g->line_size = g->w * 4;
+            g->start_x = x * 4;
+            g->start_y = y * g->line_size;
+            g->max_x = g->start_x + w * 4;
+            g->max_y = g->start_y + h * g->line_size;
+            g->cur_x = g->start_x;
+            g->cur_y = g->start_y;
+
+            g->lflags = stbi__get8(s);
+
+            if (g->lflags & 0x40) {
+                g->step = 8 * g->line_size; // first interlaced spacing
+                g->parse = 3;
+            }
+            else {
+                g->step = g->line_size;
+                g->parse = 0;
+            }
+
+            if (g->lflags & 0x80) {
+                stbi__gif_parse_colortable(s, g->lpal, 2 << (g->lflags & 7),
+                                           g->eflags & 0x01 ? g->transparent
+                                                            : -1);
+                g->color_table = (stbi_uc*)g->lpal;
+            }
+            else if (g->flags & 0x80) {
+                g->color_table = (stbi_uc*)g->pal;
+            }
+            else
+                return stbi__errpuc("missing color table", "Corrupt GIF");
+
+            o = stbi__process_gif_raster(s, g);
+            if (o == NULL)
+                return NULL;
+
+            // if this was the first frame,
+            pcount = g->w * g->h;
+            if (first_frame && (g->bgindex > 0)) {
+                // if first frame, any pixel not drawn to gets the background
+                // color
+                for (pi = 0; pi < pcount; ++pi) {
+                    if (g->history[pi] == 0) {
+                        g->pal[g->bgindex][3] =
+                            255; // just in case it was made transparent, undo
+                                 // that; It will be reset next frame if need
+                                 // be;
+                        memcpy(&g->out[pi * 4], &g->pal[g->bgindex], 4);
+                    }
+                }
+            }
+
+            return o;
+        }
+
+        case 0x21: // Comment Extension.
+        {
+            int len;
+            int ext = stbi__get8(s);
+            if (ext == 0xF9) { // Graphic Control Extension.
+                len = stbi__get8(s);
+                if (len == 4) {
+                    g->eflags = stbi__get8(s);
+                    g->delay =
+                        10 * stbi__get16le(s); // delay - 1/100th of a second,
+                                               // saving as 1/1000ths.
+
+                    // unset old transparent
+                    if (g->transparent >= 0) {
+                        g->pal[g->transparent][3] = 255;
+                    }
+                    if (g->eflags & 0x01) {
+                        g->transparent = stbi__get8(s);
+                        if (g->transparent >= 0) {
+                            g->pal[g->transparent][3] = 0;
+                        }
+                    }
+                    else {
+                        // don't need transparent
+                        stbi__skip(s, 1);
+                        g->transparent = -1;
+                    }
+                }
+                else {
+                    stbi__skip(s, len);
+                    break;
+                }
+            }
+            while ((len = stbi__get8(s)) != 0) {
+                stbi__skip(s, len);
+            }
+            break;
+        }
+
+        case 0x3B:              // gif stream termination code
+            return (stbi_uc*)s; // using '1' causes warning on some compilers
+
+        default:
+            return stbi__errpuc("unknown code", "Corrupt GIF");
+        }
+    }
+}
+
+static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y,
+                                 int* z, int* comp, int req_comp)
+{
+    if (stbi__gif_test(s)) {
+        int layers = 0;
+        stbi_uc* u = 0;
+        stbi_uc* out = 0;
+        stbi_uc* two_back = 0;
+        stbi__gif g;
+        int stride;
+        memset(&g, 0, sizeof(g));
+        if (delays) {
+            *delays = 0;
+        }
+
+        do {
+            u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
+            if (u == (stbi_uc*)s)
+                u = 0; // end of animated gif marker
+
+            if (u) {
+                *x = g.w;
+                *y = g.h;
+                ++layers;
+                stride = g.w * g.h * 4;
+
+                if (out) {
+                    out = (stbi_uc*)STBI_REALLOC(out, layers * stride);
+                    if (delays) {
+                        *delays =
+                            (int*)STBI_REALLOC(*delays, sizeof(int) * layers);
+                    }
+                }
+                else {
+                    out = (stbi_uc*)stbi__malloc(layers * stride);
+                    if (delays) {
+                        *delays = (int*)stbi__malloc(layers * sizeof(int));
+                    }
+                }
+                memcpy(out + ((layers - 1) * stride), u, stride);
+                if (layers >= 2) {
+                    two_back = out - 2 * stride;
+                }
+
+                if (delays) {
+                    (*delays)[layers - 1U] = g.delay;
+                }
+            }
+        } while (u != 0);
+
+        // free temp buffer;
+        STBI_FREE(g.out);
+        STBI_FREE(g.history);
+        STBI_FREE(g.background);
+
+        // do the final conversion after loading everything;
+        if (req_comp && req_comp != 4)
+            out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
+
+        *z = layers;
+        return out;
+    }
+    else {
+        return stbi__errpuc("not GIF", "Image was not as a gif type.");
+    }
+}
+
+static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri)
+{
+    stbi_uc* u = 0;
+    stbi__gif g;
+    memset(&g, 0, sizeof(g));
+    STBI_NOTUSED(ri);
+
+    u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
+    if (u == (stbi_uc*)s)
+        u = 0; // end of animated gif marker
+    if (u) {
+        *x = g.w;
+        *y = g.h;
+
+        // moved conversion to after successful load so that the same
+        // can be done for multiple frames.
+        if (req_comp && req_comp != 4)
+            u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
+    }
+
+    // free buffers needed for multiple frame loading;
+    STBI_FREE(g.history);
+    STBI_FREE(g.background);
+
+    return u;
+}
+
+static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    return stbi__gif_info_raw(s, x, y, comp);
+}
+#endif
+
+// *************************************************************************************************
+// Radiance RGBE HDR loader
+// originally by Nicolas Schulz
+#ifndef STBI_NO_HDR
+static int stbi__hdr_test_core(stbi__context* s, const char* signature)
+{
+    int i;
+    for (i = 0; signature[i]; ++i)
+        if (stbi__get8(s) != signature[i])
+            return 0;
+    stbi__rewind(s);
+    return 1;
+}
+
+static int stbi__hdr_test(stbi__context* s)
+{
+    int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
+    stbi__rewind(s);
+    if (!r) {
+        r = stbi__hdr_test_core(s, "#?RGBE\n");
+        stbi__rewind(s);
+    }
+    return r;
+}
+
+#define STBI__HDR_BUFLEN 1024
+static char* stbi__hdr_gettoken(stbi__context* z, char* buffer)
+{
+    int len = 0;
+    char c = '\0';
+
+    c = (char)stbi__get8(z);
+
+    while (!stbi__at_eof(z) && c != '\n') {
+        buffer[len++] = c;
+        if (len == STBI__HDR_BUFLEN - 1) {
+            // flush to end of line
+            while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
+                ;
+            break;
+        }
+        c = (char)stbi__get8(z);
+    }
+
+    buffer[len] = 0;
+    return buffer;
+}
+
+static void stbi__hdr_convert(float* output, stbi_uc* input, int req_comp)
+{
+    if (input[3] != 0) {
+        float f1;
+        // Exponent
+        f1 = (float)ldexp(1.0f, input[3] - (int)(128 + 8));
+        if (req_comp <= 2)
+            output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
+        else {
+            output[0] = input[0] * f1;
+            output[1] = input[1] * f1;
+            output[2] = input[2] * f1;
+        }
+        if (req_comp == 2)
+            output[1] = 1;
+        if (req_comp == 4)
+            output[3] = 1;
+    }
+    else {
+        switch (req_comp) {
+        case 4:
+            output[3] = 1; /* fallthrough */
+        case 3:
+            output[0] = output[1] = output[2] = 0;
+            break;
+        case 2:
+            output[1] = 1; /* fallthrough */
+        case 1:
+            output[0] = 0;
+            break;
+        }
+    }
+}
+
+static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp,
+                             int req_comp, stbi__result_info* ri)
+{
+    char buffer[STBI__HDR_BUFLEN];
+    char* token;
+    int valid = 0;
+    int width, height;
+    stbi_uc* scanline;
+    float* hdr_data;
+    int len;
+    unsigned char count, value;
+    int i, j, k, c1, c2, z;
+    const char* headerToken;
+    STBI_NOTUSED(ri);
+
+    // Check identifier
+    headerToken = stbi__hdr_gettoken(s, buffer);
+    if (strcmp(headerToken, "#?RADIANCE") != 0 &&
+        strcmp(headerToken, "#?RGBE") != 0)
+        return stbi__errpf("not HDR", "Corrupt HDR image");
+
+    // Parse header
+    for (;;) {
+        token = stbi__hdr_gettoken(s, buffer);
+        if (token[0] == 0)
+            break;
+        if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
+            valid = 1;
+    }
+
+    if (!valid)
+        return stbi__errpf("unsupported format", "Unsupported HDR format");
+
+    // Parse width and height
+    // can't use sscanf() if we're not using stdio!
+    token = stbi__hdr_gettoken(s, buffer);
+    if (strncmp(token, "-Y ", 3))
+        return stbi__errpf("unsupported data layout", "Unsupported HDR format");
+    token += 3;
+    height = (int)strtol(token, &token, 10);
+    while (*token == ' ')
+        ++token;
+    if (strncmp(token, "+X ", 3))
+        return stbi__errpf("unsupported data layout", "Unsupported HDR format");
+    token += 3;
+    width = (int)strtol(token, NULL, 10);
+
+    *x = width;
+    *y = height;
+
+    if (comp)
+        *comp = 3;
+    if (req_comp == 0)
+        req_comp = 3;
+
+    if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
+        return stbi__errpf("too large", "HDR image is too large");
+
+    // Read data
+    hdr_data =
+        (float*)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
+    if (!hdr_data)
+        return stbi__errpf("outofmem", "Out of memory");
+
+    // Load image data
+    // image data is stored as some number of sca
+    if (width < 8 || width >= 32768) {
+        // Read flat data
+        for (j = 0; j < height; ++j) {
+            for (i = 0; i < width; ++i) {
+                stbi_uc rgbe[4];
+            main_decode_loop:
+                stbi__getn(s, rgbe, 4);
+                stbi__hdr_convert(hdr_data + j * width * req_comp +
+                                      i * req_comp,
+                                  rgbe, req_comp);
+            }
+        }
+    }
+    else {
+        // Read RLE-encoded data
+        scanline = NULL;
+
+        for (j = 0; j < height; ++j) {
+            c1 = stbi__get8(s);
+            c2 = stbi__get8(s);
+            len = stbi__get8(s);
+            if (c1 != 2 || c2 != 2 || (len & 0x80)) {
+                // not run-length encoded, so we have to actually use THIS data
+                // as a decoded pixel (note this can't be a valid pixel--one of
+                // RGB must be >= 128)
+                stbi_uc rgbe[4];
+                rgbe[0] = (stbi_uc)c1;
+                rgbe[1] = (stbi_uc)c2;
+                rgbe[2] = (stbi_uc)len;
+                rgbe[3] = (stbi_uc)stbi__get8(s);
+                stbi__hdr_convert(hdr_data, rgbe, req_comp);
+                i = 1;
+                j = 0;
+                STBI_FREE(scanline);
+                goto main_decode_loop; // yes, this makes no sense
+            }
+            len <<= 8;
+            len |= stbi__get8(s);
+            if (len != width) {
+                STBI_FREE(hdr_data);
+                STBI_FREE(scanline);
+                return stbi__errpf("invalid decoded scanline length",
+                                   "corrupt HDR");
+            }
+            if (scanline == NULL) {
+                scanline = (stbi_uc*)stbi__malloc_mad2(width, 4, 0);
+                if (!scanline) {
+                    STBI_FREE(hdr_data);
+                    return stbi__errpf("outofmem", "Out of memory");
+                }
+            }
+
+            for (k = 0; k < 4; ++k) {
+                int nleft;
+                i = 0;
+                while ((nleft = width - i) > 0) {
+                    count = stbi__get8(s);
+                    if (count > 128) {
+                        // Run
+                        value = stbi__get8(s);
+                        count -= 128;
+                        if (count > nleft) {
+                            STBI_FREE(hdr_data);
+                            STBI_FREE(scanline);
+                            return stbi__errpf("corrupt",
+                                               "bad RLE data in HDR");
+                        }
+                        for (z = 0; z < count; ++z)
+                            scanline[i++ * 4 + k] = value;
+                    }
+                    else {
+                        // Dump
+                        if (count > nleft) {
+                            STBI_FREE(hdr_data);
+                            STBI_FREE(scanline);
+                            return stbi__errpf("corrupt",
+                                               "bad RLE data in HDR");
+                        }
+                        for (z = 0; z < count; ++z)
+                            scanline[i++ * 4 + k] = stbi__get8(s);
+                    }
+                }
+            }
+            for (i = 0; i < width; ++i)
+                stbi__hdr_convert(hdr_data + (j * width + i) * req_comp,
+                                  scanline + i * 4, req_comp);
+        }
+        if (scanline)
+            STBI_FREE(scanline);
+    }
+
+    return hdr_data;
+}
+
+static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    char buffer[STBI__HDR_BUFLEN];
+    char* token;
+    int valid = 0;
+    int dummy;
+
+    if (!x)
+        x = &dummy;
+    if (!y)
+        y = &dummy;
+    if (!comp)
+        comp = &dummy;
+
+    if (stbi__hdr_test(s) == 0) {
+        stbi__rewind(s);
+        return 0;
+    }
+
+    for (;;) {
+        token = stbi__hdr_gettoken(s, buffer);
+        if (token[0] == 0)
+            break;
+        if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
+            valid = 1;
+    }
+
+    if (!valid) {
+        stbi__rewind(s);
+        return 0;
+    }
+    token = stbi__hdr_gettoken(s, buffer);
+    if (strncmp(token, "-Y ", 3)) {
+        stbi__rewind(s);
+        return 0;
+    }
+    token += 3;
+    *y = (int)strtol(token, &token, 10);
+    while (*token == ' ')
+        ++token;
+    if (strncmp(token, "+X ", 3)) {
+        stbi__rewind(s);
+        return 0;
+    }
+    token += 3;
+    *x = (int)strtol(token, NULL, 10);
+    *comp = 3;
+    return 1;
+}
+#endif // STBI_NO_HDR
+
+#ifndef STBI_NO_BMP
+static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    void* p;
+    stbi__bmp_data info;
+
+    info.all_a = 255;
+    p = stbi__bmp_parse_header(s, &info);
+    stbi__rewind(s);
+    if (p == NULL)
+        return 0;
+    if (x)
+        *x = s->img_x;
+    if (y)
+        *y = s->img_y;
+    if (comp)
+        *comp = info.ma ? 4 : 3;
+    return 1;
+}
+#endif
+
+#ifndef STBI_NO_PSD
+static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    int channelCount, dummy, depth;
+    if (!x)
+        x = &dummy;
+    if (!y)
+        y = &dummy;
+    if (!comp)
+        comp = &dummy;
+    if (stbi__get32be(s) != 0x38425053) {
+        stbi__rewind(s);
+        return 0;
+    }
+    if (stbi__get16be(s) != 1) {
+        stbi__rewind(s);
+        return 0;
+    }
+    stbi__skip(s, 6);
+    channelCount = stbi__get16be(s);
+    if (channelCount < 0 || channelCount > 16) {
+        stbi__rewind(s);
+        return 0;
+    }
+    *y = stbi__get32be(s);
+    *x = stbi__get32be(s);
+    depth = stbi__get16be(s);
+    if (depth != 8 && depth != 16) {
+        stbi__rewind(s);
+        return 0;
+    }
+    if (stbi__get16be(s) != 3) {
+        stbi__rewind(s);
+        return 0;
+    }
+    *comp = 4;
+    return 1;
+}
+
+static int stbi__psd_is16(stbi__context* s)
+{
+    int channelCount, depth;
+    if (stbi__get32be(s) != 0x38425053) {
+        stbi__rewind(s);
+        return 0;
+    }
+    if (stbi__get16be(s) != 1) {
+        stbi__rewind(s);
+        return 0;
+    }
+    stbi__skip(s, 6);
+    channelCount = stbi__get16be(s);
+    if (channelCount < 0 || channelCount > 16) {
+        stbi__rewind(s);
+        return 0;
+    }
+    (void)stbi__get32be(s);
+    (void)stbi__get32be(s);
+    depth = stbi__get16be(s);
+    if (depth != 16) {
+        stbi__rewind(s);
+        return 0;
+    }
+    return 1;
+}
+#endif
+
+#ifndef STBI_NO_PIC
+static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    int act_comp = 0, num_packets = 0, chained, dummy;
+    stbi__pic_packet packets[10];
+
+    if (!x)
+        x = &dummy;
+    if (!y)
+        y = &dummy;
+    if (!comp)
+        comp = &dummy;
+
+    if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) {
+        stbi__rewind(s);
+        return 0;
+    }
+
+    stbi__skip(s, 88);
+
+    *x = stbi__get16be(s);
+    *y = stbi__get16be(s);
+    if (stbi__at_eof(s)) {
+        stbi__rewind(s);
+        return 0;
+    }
+    if ((*x) != 0 && (1 << 28) / (*x) < (*y)) {
+        stbi__rewind(s);
+        return 0;
+    }
+
+    stbi__skip(s, 8);
+
+    do {
+        stbi__pic_packet* packet;
+
+        if (num_packets == sizeof(packets) / sizeof(packets[0]))
+            return 0;
+
+        packet = &packets[num_packets++];
+        chained = stbi__get8(s);
+        packet->size = stbi__get8(s);
+        packet->type = stbi__get8(s);
+        packet->channel = stbi__get8(s);
+        act_comp |= packet->channel;
+
+        if (stbi__at_eof(s)) {
+            stbi__rewind(s);
+            return 0;
+        }
+        if (packet->size != 8) {
+            stbi__rewind(s);
+            return 0;
+        }
+    } while (chained);
+
+    *comp = (act_comp & 0x10 ? 4 : 3);
+
+    return 1;
+}
+#endif
+
+// *************************************************************************************************
+// Portable Gray Map and Portable Pixel Map loader
+// by Ken Miller
+//
+// PGM: http://netpbm.sourceforge.net/doc/pgm.html
+// PPM: http://netpbm.sourceforge.net/doc/ppm.html
+//
+// Known limitations:
+//    Does not support comments in the header section
+//    Does not support ASCII image data (formats P2 and P3)
+//    Does not support 16-bit-per-channel
+
+#ifndef STBI_NO_PNM
+
+static int stbi__pnm_test(stbi__context* s)
+{
+    char p, t;
+    p = (char)stbi__get8(s);
+    t = (char)stbi__get8(s);
+    if (p != 'P' || (t != '5' && t != '6')) {
+        stbi__rewind(s);
+        return 0;
+    }
+    return 1;
+}
+
+static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp,
+                            int req_comp, stbi__result_info* ri)
+{
+    stbi_uc* out;
+    STBI_NOTUSED(ri);
+
+    if (!stbi__pnm_info(s, (int*)&s->img_x, (int*)&s->img_y, (int*)&s->img_n))
+        return 0;
+
+    *x = s->img_x;
+    *y = s->img_y;
+    if (comp)
+        *comp = s->img_n;
+
+    if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0))
+        return stbi__errpuc("too large", "PNM too large");
+
+    out = (stbi_uc*)stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0);
+    if (!out)
+        return stbi__errpuc("outofmem", "Out of memory");
+    stbi__getn(s, out, s->img_n * s->img_x * s->img_y);
+
+    if (req_comp && req_comp != s->img_n) {
+        out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
+        if (out == NULL)
+            return out; // stbi__convert_format frees input on failure
+    }
+    return out;
+}
+
+static int stbi__pnm_isspace(char c)
+{
+    return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' ||
+           c == '\r';
+}
+
+static void stbi__pnm_skip_whitespace(stbi__context* s, char* c)
+{
+    for (;;) {
+        while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
+            *c = (char)stbi__get8(s);
+
+        if (stbi__at_eof(s) || *c != '#')
+            break;
+
+        while (!stbi__at_eof(s) && *c != '\n' && *c != '\r')
+            *c = (char)stbi__get8(s);
+    }
+}
+
+static int stbi__pnm_isdigit(char c) { return c >= '0' && c <= '9'; }
+
+static int stbi__pnm_getinteger(stbi__context* s, char* c)
+{
+    int value = 0;
+
+    while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
+        value = value * 10 + (*c - '0');
+        *c = (char)stbi__get8(s);
+    }
+
+    return value;
+}
+
+static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp)
+{
+    int maxv, dummy;
+    char c, p, t;
+
+    if (!x)
+        x = &dummy;
+    if (!y)
+        y = &dummy;
+    if (!comp)
+        comp = &dummy;
+
+    stbi__rewind(s);
+
+    // Get identifier
+    p = (char)stbi__get8(s);
+    t = (char)stbi__get8(s);
+    if (p != 'P' || (t != '5' && t != '6')) {
+        stbi__rewind(s);
+        return 0;
+    }
+
+    *comp =
+        (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm
+
+    c = (char)stbi__get8(s);
+    stbi__pnm_skip_whitespace(s, &c);
+
+    *x = stbi__pnm_getinteger(s, &c); // read width
+    stbi__pnm_skip_whitespace(s, &c);
+
+    *y = stbi__pnm_getinteger(s, &c); // read height
+    stbi__pnm_skip_whitespace(s, &c);
+
+    maxv = stbi__pnm_getinteger(s, &c); // read max value
+
+    if (maxv > 255)
+        return stbi__err("max value > 255", "PPM image not 8-bit");
+    else
+        return 1;
+}
+#endif
+
+static int stbi__info_main(stbi__context* s, int* x, int* y, int* comp)
+{
+#ifndef STBI_NO_JPEG
+    if (stbi__jpeg_info(s, x, y, comp))
+        return 1;
+#endif
+
+#ifndef STBI_NO_PNG
+    if (stbi__png_info(s, x, y, comp))
+        return 1;
+#endif
+
+#ifndef STBI_NO_GIF
+    if (stbi__gif_info(s, x, y, comp))
+        return 1;
+#endif
+
+#ifndef STBI_NO_BMP
+    if (stbi__bmp_info(s, x, y, comp))
+        return 1;
+#endif
+
+#ifndef STBI_NO_PSD
+    if (stbi__psd_info(s, x, y, comp))
+        return 1;
+#endif
+
+#ifndef STBI_NO_PIC
+    if (stbi__pic_info(s, x, y, comp))
+        return 1;
+#endif
+
+#ifndef STBI_NO_PNM
+    if (stbi__pnm_info(s, x, y, comp))
+        return 1;
+#endif
+
+#ifndef STBI_NO_HDR
+    if (stbi__hdr_info(s, x, y, comp))
+        return 1;
+#endif
+
+// test tga last because it's a crappy test!
+#ifndef STBI_NO_TGA
+    if (stbi__tga_info(s, x, y, comp))
+        return 1;
+#endif
+    return stbi__err("unknown image type",
+                     "Image not of any known type, or corrupt");
+}
+
+static int stbi__is_16_main(stbi__context* s)
+{
+#ifndef STBI_NO_PNG
+    if (stbi__png_is16(s))
+        return 1;
+#endif
+
+#ifndef STBI_NO_PSD
+    if (stbi__psd_is16(s))
+        return 1;
+#endif
+
+    return 0;
+}
+
+#ifndef STBI_NO_STDIO
+STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp)
+{
+    FILE* f = stbi__fopen(filename, "rb");
+    int result;
+    if (!f)
+        return stbi__err("can't fopen", "Unable to open file");
+    result = stbi_info_from_file(f, x, y, comp);
+    fclose(f);
+    return result;
+}
+
+STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp)
+{
+    int r;
+    stbi__context s;
+    long pos = ftell(f);
+    stbi__start_file(&s, f);
+    r = stbi__info_main(&s, x, y, comp);
+    fseek(f, pos, SEEK_SET);
+    return r;
+}
+
+STBIDEF int stbi_is_16_bit(char const* filename)
+{
+    FILE* f = stbi__fopen(filename, "rb");
+    int result;
+    if (!f)
+        return stbi__err("can't fopen", "Unable to open file");
+    result = stbi_is_16_bit_from_file(f);
+    fclose(f);
+    return result;
+}
+
+STBIDEF int stbi_is_16_bit_from_file(FILE* f)
+{
+    int r;
+    stbi__context s;
+    long pos = ftell(f);
+    stbi__start_file(&s, f);
+    r = stbi__is_16_main(&s);
+    fseek(f, pos, SEEK_SET);
+    return r;
+}
+#endif // !STBI_NO_STDIO
+
+STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x,
+                                  int* y, int* comp)
+{
+    stbi__context s;
+    stbi__start_mem(&s, buffer, len);
+    return stbi__info_main(&s, x, y, comp);
+}
+
+STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* c, void* user,
+                                     int* x, int* y, int* comp)
+{
+    stbi__context s;
+    stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user);
+    return stbi__info_main(&s, x, y, comp);
+}
+
+STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len)
+{
+    stbi__context s;
+    stbi__start_mem(&s, buffer, len);
+    return stbi__is_16_main(&s);
+}
+
+STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* c,
+                                          void* user)
+{
+    stbi__context s;
+    stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user);
+    return stbi__is_16_main(&s);
+}
+
+#endif // STB_IMAGE_IMPLEMENTATION
+
+/*
+   revision history:
+      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and
+   platform ifdefs 2.19  (2018-02-11) fix warning 2.18  (2018-01-30) fix
+   warnings 2.17  (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
+                         1-bit BMP
+                         *_is_16_bit api
+                         avoid warnings
+      2.16  (2017-07-23) all functions have 16-bit variants;
+                         STBI_NO_STDIO works again;
+                         compilation fixes;
+                         fix rounding in unpremultiply;
+                         optimize vertical flip;
+                         disable raw_len validation;
+                         documentation fixes
+      2.15  (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
+                         warning fixes; disable run-time SSE detection on gcc;
+                         uniform handling of optional "return" values;
+                         thread-safe initialization of zlib tables
+      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet
+   JPGs 2.13  (2016-11-29) add 16-bit API, only supported for PNG right now 2.12
+   (2016-04-02) fix typo in 2.11 PSD fix that caused crashes 2.11  (2016-04-02)
+   allocate large structures on the stack remove white matting for transparent
+   PSD fix reported channel count for PNG & BMP re-enable SSE2 in non-gcc 64-bit
+                         support RGB-formatted JPEG
+                         read 16-bit PNGs (only as 8-bit)
+      2.10  (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
+      2.09  (2016-01-16) allow comments in PNM files
+                         16-bit-per-pixel TGA (not bit-per-component)
+                         info() for TGA could break due to .hdr handling
+                         info() for BMP to shares code instead of sloppy parse
+                         can use STBI_REALLOC_SIZED if allocator doesn't support
+   realloc code cleanup 2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD
+   as RGBA 2.07  (2015-09-13) fix compiler warnings partial animated GIF support
+                         limited 16-bpc PSD support
+                         #ifdef unused functions
+                         bug with < 92 byte PIC,PNM,HDR,TGA
+      2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
+      2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
+      2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
+      2.03  (2015-04-12) extra corruption checking (mmozeiko)
+                         stbi_set_flip_vertically_on_load (nguillemot)
+                         fix NEON support; fix mingw support
+      2.02  (2015-01-19) fix incorrect assert, fix warning
+      2.01  (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit
+   without -msse2 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG 2.00
+   (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) progressive
+   JPEG (stb) PGM/PPM support (Ken Miller) STBI_MALLOC,STBI_REALLOC,STBI_FREE
+                         GIF bugfix -- seemingly never worked
+                         STBI_NO_*, STBI_ONLY_*
+      1.48  (2014-12-14) fix incorrectly-named assert()
+      1.47  (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar
+   Cornut & stb) optimize PNG (ryg) fix bug in interlaced PNG with
+   user-specified channel count (stb) 1.46  (2014-08-26) fix broken tRNS chunk
+   (colorkey-style transparency) in non-paletted PNG 1.45  (2014-08-16) fix
+   MSVC-ARM internal compiler error by wrapping malloc 1.44  (2014-08-07)
+              various warning fixes from Ronny Chevalier
+      1.43  (2014-07-15)
+              fix MSVC-only compiler problem in code changed in 1.42
+      1.42  (2014-07-09)
+              don't define _CRT_SECURE_NO_WARNINGS (affects user code)
+              fixes to stbi__cleanup_jpeg path
+              added STBI_ASSERT to avoid requiring assert.h
+      1.41  (2014-06-25)
+              fix search&replace from 1.36 that messed up comments/error
+   messages 1.40  (2014-06-22) fix gcc struct-initialization warning 1.39
+   (2014-06-15) fix to TGA optimization when req_comp != number of components in
+   TGA; fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my
+   test suite) add support for BMP version 5 (more ignored fields) 1.38
+   (2014-06-06) suppress MSVC warnings on integer casts truncating values fix
+   accidental rename of 'skip' field of I/O 1.37  (2014-06-04) remove duplicate
+   typedef 1.36  (2014-06-03) convert to header file single-file library if
+   de-iphone isn't set, load iphone images color-swapped instead of returning
+   NULL 1.35  (2014-05-27) various warnings fix broken STBI_SIMD path fix bug
+   where stbi_load_from_file no longer left file pointer in correct place fix
+   broken non-easy path for 32-bit BMP (possibly never used) TGA optimization by
+   Arseny Kapoulkine 1.34  (unknown) use STBI_NOTUSED in
+   stbi__resample_row_generic(), fix one more leak in tga failure case 1.33
+   (2011-07-14) make stbi_is_hdr work in STBI_NO_HDR (as specified), minor
+   compiler-friendly improvements 1.32  (2011-07-13) support for "info" function
+   for all supported filetypes (SpartanJ) 1.31  (2011-06-20) a few more leak
+   fixes, bug in PNG handling (SpartanJ) 1.30  (2011-06-11) added ability to
+   load files via callbacks to accomidate custom input streams (Ben Wenger)
+              removed deprecated format-specific test/load functions
+              removed support for installable file formats (stbi_loader) --
+   would have been broken for IO callbacks anyway error cases in bmp and tga
+   give messages and don't leak (Raymond Barbiero, grisha) fix inefficiency in
+   decoding 32-bit BMP (David Woo) 1.29  (2010-08-16) various warning fixes from
+   Aurelien Pocheville 1.28  (2010-08-01) fix bug in GIF palette transparency
+   (SpartanJ) 1.27  (2010-08-01) cast-to-stbi_uc to fix warnings 1.26
+   (2010-07-24) fix bug in file buffering for PNG reported by SpartanJ 1.25
+   (2010-07-17) refix trans_data warning (Won Chun) 1.24  (2010-07-12) perf
+   improvements reading from files on platforms with lock-heavy fgetc() minor
+   perf improvements for jpeg deprecated type-specific functions so we'll get
+   feedback if they're needed attempt to fix trans_data warning (Won Chun) 1.23
+   fixed bug in iPhone support 1.22  (2010-07-10) removed image *writing*
+   support stbi_info support from Jetro Lauha GIF support from Jean-Marc Lienher
+              iPhone PNG-extensions from James Brown
+              warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err.
+   Janez (U+017D)emva) 1.21    fix use of 'stbi_uc' in header (reported by jon
+   blow) 1.20    added support for Softimage PIC, by Tom Seddon 1.19    bug in
+   interlaced PNG corruption check (found by ryg) 1.18  (2008-08-02) fix a
+   threading bug (local mutable static) 1.17    support interlaced PNG 1.16
+   major bugfix - stbi__convert_format converted one too many pixels 1.15
+   initialize some fields for thread safety 1.14    fix threadsafe conversion
+   bug header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
+      1.13    threadsafe
+      1.12    const qualifiers in the API
+      1.11    Support installable IDCT, colorspace conversion routines
+      1.10    Fixes for 64-bit (don't use "unsigned long")
+              optimized upsampling by Fabian "ryg" Giesen
+      1.09    Fix format-conversion for PSD code (bad global variables!)
+      1.08    Thatcher Ulrich's PSD code integrated by Nicolas Schulz
+      1.07    attempt to fix C++ warning/errors again
+      1.06    attempt to fix C++ warning/errors again
+      1.05    fix TGA loading to return correct *comp and use good luminance
+   calc 1.04    default float alpha is 1, not 255; use 'void *' for
+   stbi_image_free 1.03    bugfixes to STBI_NO_STDIO, STBI_NO_HDR 1.02 support
+   for (subset of) HDR files, float interface for preferred access to them 1.01
+   fix bug: possible bug in handling right-side up bmps... not sure fix bug: the
+   stbi__bmp_load() and stbi__tga_load() functions didn't work at all 1.00
+   interface to zlib that skips zlib header 0.99    correct handling of alpha in
+   palette 0.98    TGA loader by lonesock; dynamically add loaders (untested)
+      0.97    jpeg errors on too large a file; also catch another malloc failure
+      0.96    fix detection of invalid v value - particleman@mollyrocket forum
+      0.95    during header scan, seek to markers in case of padding
+      0.94    STBI_NO_STDIO to disable stdio usage; rename all #defines the same
+      0.93    handle jpegtran output; verbose errors
+      0.92    read 4,8,16,24,32-bit BMP files of several formats
+      0.91    output 24-bit Windows 3.0 BMP files
+      0.90    fix a few more warnings; bump version number to approach 1.0
+      0.61    bugfixes due to Marc LeBlanc, Christopher Lloyd
+      0.60    fix compiling as c++
+      0.59    fix warnings: merge Dave Moore's -Wall fixes
+      0.58    fix bug: zlib uncompressed mode len/nlen was wrong endian
+      0.57    fix bug: jpg last huffman symbol before marker was >9 bits but
+   less than 16 available 0.56    fix bug: zlib uncompressed mode len vs. nlen
+      0.55    fix bug: restart_interval not initialized to 0
+      0.54    allow NULL for 'int *comp'
+      0.53    fix bug in png 3->4; speedup png decoding
+      0.52    png handles req_comp=3,4 directly; minor cleanup; jpeg comments
+      0.51    obey req_comp requests, 1-component jpegs return as 1-component,
+              on 'test' only check type, not whether we support this variant
+      0.50  (2006-11-19)
+              first released version
+*/
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/
\ No newline at end of file
diff --git a/src/viewer3d/gltf/tiny_gltf.h b/src/viewer3d/gltf/tiny_gltf.h
new file mode 100644
index 00000000..8730bb49
--- /dev/null
+++ b/src/viewer3d/gltf/tiny_gltf.h
@@ -0,0 +1,8387 @@
+//
+// Header-only tiny glTF 2.0 loader and serializer.
+//
+//
+// The MIT License (MIT)
+//
+// Copyright (c) 2015 - Present Syoyo Fujita, Aurélien Chatelain and many
+// contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// Version:
+//  - v2.6.3 Fix GLB file with empty BIN chunk was not handled. PR#382 and
+//  PR#383.
+//  - v2.6.2 Fix out-of-bounds access of accessors. PR#379.
+//  - v2.6.1 Better GLB validation check when loading.
+//  - v2.6.0 Support serializing sparse accessor(Thanks to @fynv).
+//           Disable expanding file path for security(no use of awkward
+//           `wordexp` anymore).
+//  - v2.5.0 Add SetPreserveImageChannels() option to load image data as is.
+//  - v2.4.3 Fix null object output when material has all default
+//  parameters.
+//  - v2.4.2 Decode percent-encoded URI.
+//  - v2.4.1 Fix some glTF object class does not have `extensions` and/or
+//  `extras` property.
+//  - v2.4.0 Experimental RapidJSON and C++14 support(Thanks to @jrkoone).
+//  - v2.3.1 Set default value of minFilter and magFilter in Sampler to -1.
+//  - v2.3.0 Modified Material representation according to glTF 2.0 schema
+//           (and introduced TextureInfo class)
+//           Change the behavior of `Value::IsNumber`. It return true either the
+//           value is int or real.
+//  - v2.2.0 Add loading 16bit PNG support. Add Sparse accessor support(Thanks
+//  to @Ybalrid)
+//  - v2.1.0 Add draco compression.
+//  - v2.0.1 Add comparison feature(Thanks to @Selmar).
+//  - v2.0.0 glTF 2.0!.
+//
+// Tiny glTF loader is using following third party libraries:
+//
+//  - jsonhpp: C++ JSON library.
+//  - base64: base64 decode/encode library.
+//  - stb_image: Image loading library.
+//
+#ifndef TINY_GLTF_H_
+#define TINY_GLTF_H_
+
+#include <array>
+#include <cassert>
+#include <cmath> // std::fabs
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <limits>
+#include <map>
+#include <string>
+#include <vector>
+
+// Auto-detect C++14 standard version
+#if !defined(TINYGLTF_USE_CPP14) && defined(__cplusplus) &&                    \
+    (__cplusplus >= 201402L)
+#define TINYGLTF_USE_CPP14
+#endif
+
+#ifndef TINYGLTF_USE_CPP14
+#include <functional>
+#endif
+
+#ifdef __ANDROID__
+#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS
+#include <android/asset_manager.h>
+#endif
+#endif
+
+#ifdef __GNUC__
+#if (__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 8))
+#define TINYGLTF_NOEXCEPT
+#else
+#define TINYGLTF_NOEXCEPT noexcept
+#endif
+#else
+#define TINYGLTF_NOEXCEPT noexcept
+#endif
+
+#define DEFAULT_METHODS(x)                                                     \
+    ~x() = default;                                                            \
+    x(const x&) = default;                                                     \
+    x(x&&) TINYGLTF_NOEXCEPT = default;                                        \
+    x& operator=(const x&) = default;                                          \
+    x& operator=(x&&) TINYGLTF_NOEXCEPT = default;
+
+namespace tinygltf {
+
+#define TINYGLTF_MODE_POINTS (0)
+#define TINYGLTF_MODE_LINE (1)
+#define TINYGLTF_MODE_LINE_LOOP (2)
+#define TINYGLTF_MODE_LINE_STRIP (3)
+#define TINYGLTF_MODE_TRIANGLES (4)
+#define TINYGLTF_MODE_TRIANGLE_STRIP (5)
+#define TINYGLTF_MODE_TRIANGLE_FAN (6)
+
+#define TINYGLTF_COMPONENT_TYPE_BYTE (5120)
+#define TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE (5121)
+#define TINYGLTF_COMPONENT_TYPE_SHORT (5122)
+#define TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT (5123)
+#define TINYGLTF_COMPONENT_TYPE_INT (5124)
+#define TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT (5125)
+#define TINYGLTF_COMPONENT_TYPE_FLOAT (5126)
+#define TINYGLTF_COMPONENT_TYPE_DOUBLE                                         \
+    (5130) // OpenGL double type. Note that some of glTF 2.0 validator does not
+           // support double type even the schema seems allow any value of
+           // integer:
+           // https://github.com/KhronosGroup/glTF/blob/b9884a2fd45130b4d673dd6c8a706ee21ee5c5f7/specification/2.0/schema/accessor.schema.json#L22
+
+#define TINYGLTF_TEXTURE_FILTER_NEAREST (9728)
+#define TINYGLTF_TEXTURE_FILTER_LINEAR (9729)
+#define TINYGLTF_TEXTURE_FILTER_NEAREST_MIPMAP_NEAREST (9984)
+#define TINYGLTF_TEXTURE_FILTER_LINEAR_MIPMAP_NEAREST (9985)
+#define TINYGLTF_TEXTURE_FILTER_NEAREST_MIPMAP_LINEAR (9986)
+#define TINYGLTF_TEXTURE_FILTER_LINEAR_MIPMAP_LINEAR (9987)
+
+#define TINYGLTF_TEXTURE_WRAP_REPEAT (10497)
+#define TINYGLTF_TEXTURE_WRAP_CLAMP_TO_EDGE (33071)
+#define TINYGLTF_TEXTURE_WRAP_MIRRORED_REPEAT (33648)
+
+// Redeclarations of the above for technique.parameters.
+#define TINYGLTF_PARAMETER_TYPE_BYTE (5120)
+#define TINYGLTF_PARAMETER_TYPE_UNSIGNED_BYTE (5121)
+#define TINYGLTF_PARAMETER_TYPE_SHORT (5122)
+#define TINYGLTF_PARAMETER_TYPE_UNSIGNED_SHORT (5123)
+#define TINYGLTF_PARAMETER_TYPE_INT (5124)
+#define TINYGLTF_PARAMETER_TYPE_UNSIGNED_INT (5125)
+#define TINYGLTF_PARAMETER_TYPE_FLOAT (5126)
+
+#define TINYGLTF_PARAMETER_TYPE_FLOAT_VEC2 (35664)
+#define TINYGLTF_PARAMETER_TYPE_FLOAT_VEC3 (35665)
+#define TINYGLTF_PARAMETER_TYPE_FLOAT_VEC4 (35666)
+
+#define TINYGLTF_PARAMETER_TYPE_INT_VEC2 (35667)
+#define TINYGLTF_PARAMETER_TYPE_INT_VEC3 (35668)
+#define TINYGLTF_PARAMETER_TYPE_INT_VEC4 (35669)
+
+#define TINYGLTF_PARAMETER_TYPE_BOOL (35670)
+#define TINYGLTF_PARAMETER_TYPE_BOOL_VEC2 (35671)
+#define TINYGLTF_PARAMETER_TYPE_BOOL_VEC3 (35672)
+#define TINYGLTF_PARAMETER_TYPE_BOOL_VEC4 (35673)
+
+#define TINYGLTF_PARAMETER_TYPE_FLOAT_MAT2 (35674)
+#define TINYGLTF_PARAMETER_TYPE_FLOAT_MAT3 (35675)
+#define TINYGLTF_PARAMETER_TYPE_FLOAT_MAT4 (35676)
+
+#define TINYGLTF_PARAMETER_TYPE_SAMPLER_2D (35678)
+
+// End parameter types
+
+#define TINYGLTF_TYPE_VEC2 (2)
+#define TINYGLTF_TYPE_VEC3 (3)
+#define TINYGLTF_TYPE_VEC4 (4)
+#define TINYGLTF_TYPE_MAT2 (32 + 2)
+#define TINYGLTF_TYPE_MAT3 (32 + 3)
+#define TINYGLTF_TYPE_MAT4 (32 + 4)
+#define TINYGLTF_TYPE_SCALAR (64 + 1)
+#define TINYGLTF_TYPE_VECTOR (64 + 4)
+#define TINYGLTF_TYPE_MATRIX (64 + 16)
+
+#define TINYGLTF_IMAGE_FORMAT_JPEG (0)
+#define TINYGLTF_IMAGE_FORMAT_PNG (1)
+#define TINYGLTF_IMAGE_FORMAT_BMP (2)
+#define TINYGLTF_IMAGE_FORMAT_GIF (3)
+
+#define TINYGLTF_TEXTURE_FORMAT_ALPHA (6406)
+#define TINYGLTF_TEXTURE_FORMAT_RGB (6407)
+#define TINYGLTF_TEXTURE_FORMAT_RGBA (6408)
+#define TINYGLTF_TEXTURE_FORMAT_LUMINANCE (6409)
+#define TINYGLTF_TEXTURE_FORMAT_LUMINANCE_ALPHA (6410)
+
+#define TINYGLTF_TEXTURE_TARGET_TEXTURE2D (3553)
+#define TINYGLTF_TEXTURE_TYPE_UNSIGNED_BYTE (5121)
+
+#define TINYGLTF_TARGET_ARRAY_BUFFER (34962)
+#define TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER (34963)
+
+#define TINYGLTF_SHADER_TYPE_VERTEX_SHADER (35633)
+#define TINYGLTF_SHADER_TYPE_FRAGMENT_SHADER (35632)
+
+#define TINYGLTF_DOUBLE_EPS (1.e-12)
+#define TINYGLTF_DOUBLE_EQUAL(a, b) (std::fabs((b) - (a)) < TINYGLTF_DOUBLE_EPS)
+
+#ifdef __ANDROID__
+#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS
+#ifdef TINYGLTF_IMPLEMENTATION
+AAssetManager* asset_manager = nullptr;
+#else
+extern AAssetManager* asset_manager;
+#endif
+#endif
+#endif
+
+typedef enum {
+    NULL_TYPE,
+    REAL_TYPE,
+    INT_TYPE,
+    BOOL_TYPE,
+    STRING_TYPE,
+    ARRAY_TYPE,
+    BINARY_TYPE,
+    OBJECT_TYPE
+} Type;
+
+static inline int32_t GetComponentSizeInBytes(uint32_t componentType)
+{
+    if (componentType == TINYGLTF_COMPONENT_TYPE_BYTE) {
+        return 1;
+    }
+    else if (componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE) {
+        return 1;
+    }
+    else if (componentType == TINYGLTF_COMPONENT_TYPE_SHORT) {
+        return 2;
+    }
+    else if (componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT) {
+        return 2;
+    }
+    else if (componentType == TINYGLTF_COMPONENT_TYPE_INT) {
+        return 4;
+    }
+    else if (componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT) {
+        return 4;
+    }
+    else if (componentType == TINYGLTF_COMPONENT_TYPE_FLOAT) {
+        return 4;
+    }
+    else if (componentType == TINYGLTF_COMPONENT_TYPE_DOUBLE) {
+        return 8;
+    }
+    else {
+        // Unknown component type
+        return -1;
+    }
+}
+
+static inline int32_t GetNumComponentsInType(uint32_t ty)
+{
+    if (ty == TINYGLTF_TYPE_SCALAR) {
+        return 1;
+    }
+    else if (ty == TINYGLTF_TYPE_VEC2) {
+        return 2;
+    }
+    else if (ty == TINYGLTF_TYPE_VEC3) {
+        return 3;
+    }
+    else if (ty == TINYGLTF_TYPE_VEC4) {
+        return 4;
+    }
+    else if (ty == TINYGLTF_TYPE_MAT2) {
+        return 4;
+    }
+    else if (ty == TINYGLTF_TYPE_MAT3) {
+        return 9;
+    }
+    else if (ty == TINYGLTF_TYPE_MAT4) {
+        return 16;
+    }
+    else {
+        // Unknown component type
+        return -1;
+    }
+}
+
+// TODO(syoyo): Move these functions to TinyGLTF class
+bool IsDataURI(const std::string& in);
+bool DecodeDataURI(std::vector<unsigned char>* out, std::string& mime_type,
+                   const std::string& in, size_t reqBytes, bool checkSize);
+
+#ifdef __clang__
+#pragma clang diagnostic push
+// Suppress warning for : static Value null_value
+#pragma clang diagnostic ignored "-Wexit-time-destructors"
+#pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+// Simple class to represent JSON object
+class Value {
+public:
+    typedef std::vector<Value> Array;
+    typedef std::map<std::string, Value> Object;
+
+    Value()
+        : type_(NULL_TYPE), int_value_(0), real_value_(0.0),
+          boolean_value_(false)
+    {
+    }
+
+    explicit Value(bool b) : type_(BOOL_TYPE) { boolean_value_ = b; }
+    explicit Value(int i) : type_(INT_TYPE)
+    {
+        int_value_ = i;
+        real_value_ = i;
+    }
+    explicit Value(double n) : type_(REAL_TYPE) { real_value_ = n; }
+    explicit Value(const std::string& s) : type_(STRING_TYPE)
+    {
+        string_value_ = s;
+    }
+    explicit Value(std::string&& s)
+        : type_(STRING_TYPE), string_value_(std::move(s))
+    {
+    }
+    explicit Value(const unsigned char* p, size_t n) : type_(BINARY_TYPE)
+    {
+        binary_value_.resize(n);
+        memcpy(binary_value_.data(), p, n);
+    }
+    explicit Value(std::vector<unsigned char>&& v) noexcept
+        : type_(BINARY_TYPE), binary_value_(std::move(v))
+    {
+    }
+    explicit Value(const Array& a) : type_(ARRAY_TYPE) { array_value_ = a; }
+    explicit Value(Array&& a) noexcept
+        : type_(ARRAY_TYPE), array_value_(std::move(a))
+    {
+    }
+
+    explicit Value(const Object& o) : type_(OBJECT_TYPE) { object_value_ = o; }
+    explicit Value(Object&& o) noexcept
+        : type_(OBJECT_TYPE), object_value_(std::move(o))
+    {
+    }
+
+    DEFAULT_METHODS(Value)
+
+    char Type() const { return static_cast<char>(type_); }
+
+    bool IsBool() const { return (type_ == BOOL_TYPE); }
+
+    bool IsInt() const { return (type_ == INT_TYPE); }
+
+    bool IsNumber() const
+    {
+        return (type_ == REAL_TYPE) || (type_ == INT_TYPE);
+    }
+
+    bool IsReal() const { return (type_ == REAL_TYPE); }
+
+    bool IsString() const { return (type_ == STRING_TYPE); }
+
+    bool IsBinary() const { return (type_ == BINARY_TYPE); }
+
+    bool IsArray() const { return (type_ == ARRAY_TYPE); }
+
+    bool IsObject() const { return (type_ == OBJECT_TYPE); }
+
+    // Use this function if you want to have number value as double.
+    double GetNumberAsDouble() const
+    {
+        if (type_ == INT_TYPE) {
+            return double(int_value_);
+        }
+        else {
+            return real_value_;
+        }
+    }
+
+    // Use this function if you want to have number value as int.
+    // TODO(syoyo): Support int value larger than 32 bits
+    int GetNumberAsInt() const
+    {
+        if (type_ == REAL_TYPE) {
+            return int(real_value_);
+        }
+        else {
+            return int_value_;
+        }
+    }
+
+    // Accessor
+    template <typename T> const T& Get() const;
+    template <typename T> T& Get();
+
+    // Lookup value from an array
+    const Value& Get(int idx) const
+    {
+        static Value null_value;
+        assert(IsArray());
+        assert(idx >= 0);
+        return (static_cast<size_t>(idx) < array_value_.size())
+                   ? array_value_[static_cast<size_t>(idx)]
+                   : null_value;
+    }
+
+    // Lookup value from a key-value pair
+    const Value& Get(const std::string& key) const
+    {
+        static Value null_value;
+        assert(IsObject());
+        Object::const_iterator it = object_value_.find(key);
+        return (it != object_value_.end()) ? it->second : null_value;
+    }
+
+    size_t ArrayLen() const
+    {
+        if (!IsArray())
+            return 0;
+        return array_value_.size();
+    }
+
+    // Valid only for object type.
+    bool Has(const std::string& key) const
+    {
+        if (!IsObject())
+            return false;
+        Object::const_iterator it = object_value_.find(key);
+        return (it != object_value_.end()) ? true : false;
+    }
+
+    // List keys
+    std::vector<std::string> Keys() const
+    {
+        std::vector<std::string> keys;
+        if (!IsObject())
+            return keys; // empty
+
+        for (Object::const_iterator it = object_value_.begin();
+             it != object_value_.end(); ++it) {
+            keys.push_back(it->first);
+        }
+
+        return keys;
+    }
+
+    size_t Size() const { return (IsArray() ? ArrayLen() : Keys().size()); }
+
+    bool operator==(const tinygltf::Value& other) const;
+
+protected:
+    int type_ = NULL_TYPE;
+
+    int int_value_ = 0;
+    double real_value_ = 0.0;
+    std::string string_value_;
+    std::vector<unsigned char> binary_value_;
+    Array array_value_;
+    Object object_value_;
+    bool boolean_value_ = false;
+};
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+#define TINYGLTF_VALUE_GET(ctype, var)                                         \
+    template <> inline const ctype& Value::Get<ctype>() const                  \
+    {                                                                          \
+        return var;                                                            \
+    }                                                                          \
+    template <> inline ctype& Value::Get<ctype>()                              \
+    {                                                                          \
+        return var;                                                            \
+    }
+TINYGLTF_VALUE_GET(bool, boolean_value_)
+TINYGLTF_VALUE_GET(double, real_value_)
+TINYGLTF_VALUE_GET(int, int_value_)
+TINYGLTF_VALUE_GET(std::string, string_value_)
+TINYGLTF_VALUE_GET(std::vector<unsigned char>, binary_value_)
+TINYGLTF_VALUE_GET(Value::Array, array_value_)
+TINYGLTF_VALUE_GET(Value::Object, object_value_)
+#undef TINYGLTF_VALUE_GET
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+/// Aggregate object for representing a color
+using ColorValue = std::array<double, 4>;
+
+// === legacy interface ====
+// TODO(syoyo): Deprecate `Parameter` class.
+struct Parameter {
+    bool bool_value = false;
+    bool has_number_value = false;
+    std::string string_value;
+    std::vector<double> number_array;
+    std::map<std::string, double> json_double_value;
+    double number_value = 0.0;
+
+    // context sensitive methods. depending the type of the Parameter you are
+    // accessing, these are either valid or not
+    // If this parameter represent a texture map in a material, will return the
+    // texture index
+
+    /// Return the index of a texture if this Parameter is a texture map.
+    /// Returned value is only valid if the parameter represent a texture from a
+    /// material
+    int TextureIndex() const
+    {
+        const auto it = json_double_value.find("index");
+        if (it != std::end(json_double_value)) {
+            return int(it->second);
+        }
+        return -1;
+    }
+
+    /// Return the index of a texture coordinate set if this Parameter is a
+    /// texture map. Returned value is only valid if the parameter represent a
+    /// texture from a material
+    int TextureTexCoord() const
+    {
+        const auto it = json_double_value.find("texCoord");
+        if (it != std::end(json_double_value)) {
+            return int(it->second);
+        }
+        // As per the spec, if texCoord is omitted, this parameter is 0
+        return 0;
+    }
+
+    /// Return the scale of a texture if this Parameter is a normal texture map.
+    /// Returned value is only valid if the parameter represent a normal texture
+    /// from a material
+    double TextureScale() const
+    {
+        const auto it = json_double_value.find("scale");
+        if (it != std::end(json_double_value)) {
+            return it->second;
+        }
+        // As per the spec, if scale is omitted, this parameter is 1
+        return 1;
+    }
+
+    /// Return the strength of a texture if this Parameter is a an occlusion
+    /// map. Returned value is only valid if the parameter represent an
+    /// occlusion map from a material
+    double TextureStrength() const
+    {
+        const auto it = json_double_value.find("strength");
+        if (it != std::end(json_double_value)) {
+            return it->second;
+        }
+        // As per the spec, if strength is omitted, this parameter is 1
+        return 1;
+    }
+
+    /// Material factor, like the roughness or metalness of a material
+    /// Returned value is only valid if the parameter represent a texture from a
+    /// material
+    double Factor() const { return number_value; }
+
+    /// Return the color of a material
+    /// Returned value is only valid if the parameter represent a texture from a
+    /// material
+    ColorValue ColorFactor() const
+    {
+        return {{// this aggregate initialize the std::array object, and uses
+                 // C++11 RVO.
+                 number_array[0], number_array[1], number_array[2],
+                 (number_array.size() > 3 ? number_array[3] : 1.0)}};
+    }
+
+    Parameter() = default;
+    DEFAULT_METHODS(Parameter)
+    bool operator==(const Parameter&) const;
+};
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+typedef std::map<std::string, Parameter> ParameterMap;
+typedef std::map<std::string, Value> ExtensionMap;
+
+struct AnimationChannel {
+    int sampler;             // required
+    int target_node;         // required (index of the node to target)
+    std::string target_path; // required in ["translation", "rotation", "scale",
+                             // "weights"]
+    Value extras;
+    ExtensionMap extensions;
+    ExtensionMap target_extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+    std::string target_extensions_json_string;
+
+    AnimationChannel() : sampler(-1), target_node(-1) {}
+    DEFAULT_METHODS(AnimationChannel)
+    bool operator==(const AnimationChannel&) const;
+};
+
+struct AnimationSampler {
+    int input;                 // required
+    int output;                // required
+    std::string interpolation; // "LINEAR", "STEP","CUBICSPLINE" or user defined
+                               // string. default "LINEAR"
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    AnimationSampler() : input(-1), output(-1), interpolation("LINEAR") {}
+    DEFAULT_METHODS(AnimationSampler)
+    bool operator==(const AnimationSampler&) const;
+};
+
+struct Animation {
+    std::string name;
+    std::vector<AnimationChannel> channels;
+    std::vector<AnimationSampler> samplers;
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Animation() = default;
+    DEFAULT_METHODS(Animation)
+    bool operator==(const Animation&) const;
+};
+
+struct Skin {
+    std::string name;
+    int inverseBindMatrices; // required here but not in the spec
+    int skeleton;            // The index of the node used as a skeleton root
+    std::vector<int> joints; // Indices of skeleton nodes
+
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Skin()
+    {
+        inverseBindMatrices = -1;
+        skeleton = -1;
+    }
+    DEFAULT_METHODS(Skin)
+    bool operator==(const Skin&) const;
+};
+
+struct Sampler {
+    std::string name;
+    // glTF 2.0 spec does not define default value for `minFilter` and
+    // `magFilter`. Set -1 in TinyGLTF(issue #186)
+    int minFilter =
+        -1; // optional. -1 = no filter defined. ["NEAREST", "LINEAR",
+            // "NEAREST_MIPMAP_NEAREST", "LINEAR_MIPMAP_NEAREST",
+            // "NEAREST_MIPMAP_LINEAR", "LINEAR_MIPMAP_LINEAR"]
+    int magFilter =
+        -1; // optional. -1 = no filter defined. ["NEAREST", "LINEAR"]
+    int wrapS =
+        TINYGLTF_TEXTURE_WRAP_REPEAT; // ["CLAMP_TO_EDGE", "MIRRORED_REPEAT",
+                                      // "REPEAT"], default "REPEAT"
+    int wrapT =
+        TINYGLTF_TEXTURE_WRAP_REPEAT; // ["CLAMP_TO_EDGE", "MIRRORED_REPEAT",
+                                      // "REPEAT"], default "REPEAT"
+    // int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT;  // TinyGLTF extension.
+    // currently not used.
+
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Sampler()
+        : minFilter(-1), magFilter(-1), wrapS(TINYGLTF_TEXTURE_WRAP_REPEAT),
+          wrapT(TINYGLTF_TEXTURE_WRAP_REPEAT)
+    {
+    }
+    DEFAULT_METHODS(Sampler)
+    bool operator==(const Sampler&) const;
+};
+
+struct Image {
+    std::string name;
+    int width;
+    int height;
+    int component;
+    int bits;       // bit depth per channel. 8(byte), 16 or 32.
+    int pixel_type; // pixel type(TINYGLTF_COMPONENT_TYPE_***). usually
+                    // UBYTE(bits = 8) or USHORT(bits = 16)
+    std::vector<unsigned char> image;
+    int bufferView;       // (required if no uri)
+    std::string mimeType; // (required if no uri) ["image/jpeg", "image/png",
+                          // "image/bmp", "image/gif"]
+    std::string uri;      // (required if no mimeType) uri is not decoded(e.g.
+                          // whitespace may be represented as %20)
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    // When this flag is true, data is stored to `image` in as-is format(e.g.
+    // jpeg compressed for "image/jpeg" mime) This feature is good if you use
+    // custom image loader function. (e.g. delayed decoding of images for faster
+    // glTF parsing) Default parser for Image does not provide as-is loading
+    // feature at the moment. (You can manipulate this by providing your own
+    // LoadImageData function)
+    bool as_is;
+
+    Image() : as_is(false)
+    {
+        bufferView = -1;
+        width = -1;
+        height = -1;
+        component = -1;
+        bits = -1;
+        pixel_type = -1;
+    }
+    DEFAULT_METHODS(Image)
+
+    bool operator==(const Image&) const;
+};
+
+struct Texture {
+    std::string name;
+
+    int sampler;
+    int source;
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Texture() : sampler(-1), source(-1) {}
+    DEFAULT_METHODS(Texture)
+
+    bool operator==(const Texture&) const;
+};
+
+struct TextureInfo {
+    int index = -1; // required.
+    int texCoord;   // The set index of texture's TEXCOORD attribute used for
+                    // texture coordinate mapping.
+
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    TextureInfo() : index(-1), texCoord(0) {}
+    DEFAULT_METHODS(TextureInfo)
+    bool operator==(const TextureInfo&) const;
+};
+
+struct NormalTextureInfo {
+    int index = -1; // required
+    int texCoord;   // The set index of texture's TEXCOORD attribute used for
+                    // texture coordinate mapping.
+    double scale;   // scaledNormal = normalize((<sampled normal texture value>
+                    // * 2.0 - 1.0) * vec3(<normal scale>, <normal scale>, 1.0))
+
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    NormalTextureInfo() : index(-1), texCoord(0), scale(1.0) {}
+    DEFAULT_METHODS(NormalTextureInfo)
+    bool operator==(const NormalTextureInfo&) const;
+};
+
+struct OcclusionTextureInfo {
+    int index = -1;  // required
+    int texCoord;    // The set index of texture's TEXCOORD attribute used for
+                     // texture coordinate mapping.
+    double strength; // occludedColor = lerp(color, color * <sampled occlusion
+                     // texture value>, <occlusion strength>)
+
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    OcclusionTextureInfo() : index(-1), texCoord(0), strength(1.0) {}
+    DEFAULT_METHODS(OcclusionTextureInfo)
+    bool operator==(const OcclusionTextureInfo&) const;
+};
+
+// pbrMetallicRoughness class defined in glTF 2.0 spec.
+struct PbrMetallicRoughness {
+    std::vector<double> baseColorFactor; // len = 4. default [1,1,1,1]
+    TextureInfo baseColorTexture;
+    double metallicFactor;  // default 1
+    double roughnessFactor; // default 1
+    TextureInfo metallicRoughnessTexture;
+
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    PbrMetallicRoughness()
+        : baseColorFactor(std::vector<double>{1.0, 1.0, 1.0, 1.0}),
+          metallicFactor(1.0), roughnessFactor(1.0)
+    {
+    }
+    DEFAULT_METHODS(PbrMetallicRoughness)
+    bool operator==(const PbrMetallicRoughness&) const;
+};
+
+// Each extension should be stored in a ParameterMap.
+// members not in the values could be included in the ParameterMap
+// to keep a single material model
+struct Material {
+    std::string name;
+
+    std::vector<double> emissiveFactor; // length 3. default [0, 0, 0]
+    std::string alphaMode;              // default "OPAQUE"
+    double alphaCutoff;                 // default 0.5
+    bool doubleSided;                   // default false;
+
+    PbrMetallicRoughness pbrMetallicRoughness;
+
+    NormalTextureInfo normalTexture;
+    OcclusionTextureInfo occlusionTexture;
+    TextureInfo emissiveTexture;
+
+    // For backward compatibility
+    // TODO(syoyo): Remove `values` and `additionalValues` in the next release.
+    ParameterMap values;
+    ParameterMap additionalValues;
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Material() : alphaMode("OPAQUE"), alphaCutoff(0.5), doubleSided(false) {}
+    DEFAULT_METHODS(Material)
+
+    bool operator==(const Material&) const;
+};
+
+struct BufferView {
+    std::string name;
+    int buffer{-1};       // Required
+    size_t byteOffset{0}; // minimum 0, default 0
+    size_t byteLength{0}; // required, minimum 1. 0 = invalid
+    size_t byteStride{0}; // minimum 4, maximum 252 (multiple of 4), default 0 =
+                          // understood to be tightly packed
+    int target{0};        // ["ARRAY_BUFFER", "ELEMENT_ARRAY_BUFFER"] for vertex
+                          // indices or attribs. Could be 0 for other data
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    bool dracoDecoded{false}; // Flag indicating this has been draco decoded
+
+    BufferView()
+        : buffer(-1), byteOffset(0), byteLength(0), byteStride(0), target(0),
+          dracoDecoded(false)
+    {
+    }
+    DEFAULT_METHODS(BufferView)
+    bool operator==(const BufferView&) const;
+};
+
+struct Accessor {
+    int bufferView; // optional in spec but required here since sparse accessor
+                    // are not supported
+    std::string name;
+    size_t byteOffset;
+    bool normalized;   // optional.
+    int componentType; // (required) One of TINYGLTF_COMPONENT_TYPE_***
+    size_t count;      // required
+    int type;          // (required) One of TINYGLTF_TYPE_***   ..
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    std::vector<double>
+        minValues; // optional. integer value is promoted to double
+    std::vector<double>
+        maxValues; // optional. integer value is promoted to double
+
+    struct {
+        int count;
+        bool isSparse;
+        struct {
+            int byteOffset;
+            int bufferView;
+            int componentType; // a TINYGLTF_COMPONENT_TYPE_ value
+        } indices;
+        struct {
+            int bufferView;
+            int byteOffset;
+        } values;
+    } sparse;
+
+    ///
+    /// Utility function to compute byteStride for a given bufferView object.
+    /// Returns -1 upon invalid glTF value or parameter configuration.
+    ///
+    int ByteStride(const BufferView& bufferViewObject) const
+    {
+        if (bufferViewObject.byteStride == 0) {
+            // Assume data is tightly packed.
+            int componentSizeInBytes =
+                GetComponentSizeInBytes(static_cast<uint32_t>(componentType));
+            if (componentSizeInBytes <= 0) {
+                return -1;
+            }
+
+            int numComponents =
+                GetNumComponentsInType(static_cast<uint32_t>(type));
+            if (numComponents <= 0) {
+                return -1;
+            }
+
+            return componentSizeInBytes * numComponents;
+        }
+        else {
+            // Check if byteStride is a multiple of the size of the accessor's
+            // component type.
+            int componentSizeInBytes =
+                GetComponentSizeInBytes(static_cast<uint32_t>(componentType));
+            if (componentSizeInBytes <= 0) {
+                return -1;
+            }
+
+            if ((bufferViewObject.byteStride %
+                 uint32_t(componentSizeInBytes)) != 0) {
+                return -1;
+            }
+            return static_cast<int>(bufferViewObject.byteStride);
+        }
+
+        // unreachable return 0;
+    }
+
+    Accessor()
+        : bufferView(-1), byteOffset(0), normalized(false), componentType(-1),
+          count(0), type(-1)
+    {
+        sparse.isSparse = false;
+    }
+    DEFAULT_METHODS(Accessor)
+    bool operator==(const tinygltf::Accessor&) const;
+};
+
+struct PerspectiveCamera {
+    double aspectRatio; // min > 0
+    double yfov;        // required. min > 0
+    double zfar;        // min > 0
+    double znear;       // required. min > 0
+
+    PerspectiveCamera()
+        : aspectRatio(0.0), yfov(0.0),
+          zfar(0.0) // 0 = use infinite projection matrix
+          ,
+          znear(0.0)
+    {
+    }
+    DEFAULT_METHODS(PerspectiveCamera)
+    bool operator==(const PerspectiveCamera&) const;
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+};
+
+struct OrthographicCamera {
+    double xmag;  // required. must not be zero.
+    double ymag;  // required. must not be zero.
+    double zfar;  // required. `zfar` must be greater than `znear`.
+    double znear; // required
+
+    OrthographicCamera() : xmag(0.0), ymag(0.0), zfar(0.0), znear(0.0) {}
+    DEFAULT_METHODS(OrthographicCamera)
+    bool operator==(const OrthographicCamera&) const;
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+};
+
+struct Camera {
+    std::string type; // required. "perspective" or "orthographic"
+    std::string name;
+
+    PerspectiveCamera perspective;
+    OrthographicCamera orthographic;
+
+    Camera() {}
+    DEFAULT_METHODS(Camera)
+    bool operator==(const Camera&) const;
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+};
+
+struct Primitive {
+    std::map<std::string, int> attributes; // (required) A dictionary object of
+                                           // integer, where each integer
+                                           // is the index of the accessor
+                                           // containing an attribute.
+    int material; // The index of the material to apply to this primitive
+                  // when rendering.
+    int indices;  // The index of the accessor that contains the indices.
+    int mode;     // one of TINYGLTF_MODE_***
+    std::vector<std::map<std::string, int>> targets; // array of morph targets,
+    // where each target is a dict with attributes in ["POSITION, "NORMAL",
+    // "TANGENT"] pointing
+    // to their corresponding accessors
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Primitive()
+    {
+        material = -1;
+        indices = -1;
+        mode = -1;
+    }
+    DEFAULT_METHODS(Primitive)
+    bool operator==(const Primitive&) const;
+};
+
+struct Mesh {
+    std::string name;
+    std::vector<Primitive> primitives;
+    std::vector<double> weights; // weights to be applied to the Morph Targets
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Mesh() = default;
+    DEFAULT_METHODS(Mesh)
+    bool operator==(const Mesh&) const;
+};
+
+class Node {
+public:
+    Node() : camera(-1), skin(-1), mesh(-1) {}
+
+    DEFAULT_METHODS(Node)
+
+    bool operator==(const Node&) const;
+
+    int camera; // the index of the camera referenced by this node
+
+    std::string name;
+    int skin;
+    int mesh;
+    std::vector<int> children;
+    std::vector<double> rotation;    // length must be 0 or 4
+    std::vector<double> scale;       // length must be 0 or 3
+    std::vector<double> translation; // length must be 0 or 3
+    std::vector<double> matrix;      // length must be 0 or 16
+    std::vector<double> weights; // The weights of the instantiated Morph Target
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+};
+
+struct Buffer {
+    std::string name;
+    std::vector<unsigned char> data;
+    std::string uri; // considered as required here but not in the spec (need to
+                     // clarify) uri is not decoded(e.g. whitespace may be
+                     // represented as %20)
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Buffer() = default;
+    DEFAULT_METHODS(Buffer)
+    bool operator==(const Buffer&) const;
+};
+
+struct Asset {
+    std::string version = "2.0"; // required
+    std::string generator;
+    std::string minVersion;
+    std::string copyright;
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Asset() = default;
+    DEFAULT_METHODS(Asset)
+    bool operator==(const Asset&) const;
+};
+
+struct Scene {
+    std::string name;
+    std::vector<int> nodes;
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+
+    Scene() = default;
+    DEFAULT_METHODS(Scene)
+    bool operator==(const Scene&) const;
+};
+
+struct SpotLight {
+    double innerConeAngle;
+    double outerConeAngle;
+
+    SpotLight() : innerConeAngle(0.0), outerConeAngle(0.7853981634) {}
+    DEFAULT_METHODS(SpotLight)
+    bool operator==(const SpotLight&) const;
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+};
+
+struct Light {
+    std::string name;
+    std::vector<double> color;
+    double intensity{1.0};
+    std::string type;
+    double range{0.0}; // 0.0 = infinite
+    SpotLight spot;
+
+    Light() : intensity(1.0), range(0.0) {}
+    DEFAULT_METHODS(Light)
+
+    bool operator==(const Light&) const;
+
+    ExtensionMap extensions;
+    Value extras;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+};
+
+class Model {
+public:
+    Model() = default;
+    DEFAULT_METHODS(Model)
+
+    bool operator==(const Model&) const;
+
+    std::vector<Accessor> accessors;
+    std::vector<Animation> animations;
+    std::vector<Buffer> buffers;
+    std::vector<BufferView> bufferViews;
+    std::vector<Material> materials;
+    std::vector<Mesh> meshes;
+    std::vector<Node> nodes;
+    std::vector<Texture> textures;
+    std::vector<Image> images;
+    std::vector<Skin> skins;
+    std::vector<Sampler> samplers;
+    std::vector<Camera> cameras;
+    std::vector<Scene> scenes;
+    std::vector<Light> lights;
+
+    int defaultScene = -1;
+    std::vector<std::string> extensionsUsed;
+    std::vector<std::string> extensionsRequired;
+
+    Asset asset;
+
+    Value extras;
+    ExtensionMap extensions;
+
+    // Filled when SetStoreOriginalJSONForExtrasAndExtensions is enabled.
+    std::string extras_json_string;
+    std::string extensions_json_string;
+};
+
+enum SectionCheck {
+    NO_REQUIRE = 0x00,
+    REQUIRE_VERSION = 0x01,
+    REQUIRE_SCENE = 0x02,
+    REQUIRE_SCENES = 0x04,
+    REQUIRE_NODES = 0x08,
+    REQUIRE_ACCESSORS = 0x10,
+    REQUIRE_BUFFERS = 0x20,
+    REQUIRE_BUFFER_VIEWS = 0x40,
+    REQUIRE_ALL = 0x7f
+};
+
+///
+/// LoadImageDataFunction type. Signature for custom image loading callbacks.
+///
+typedef bool (*LoadImageDataFunction)(Image*, const int, std::string*,
+                                      std::string*, int, int,
+                                      const unsigned char*, int,
+                                      void* user_pointer);
+
+///
+/// WriteImageDataFunction type. Signature for custom image writing callbacks.
+///
+typedef bool (*WriteImageDataFunction)(const std::string*, const std::string*,
+                                       Image*, bool, void*);
+
+#ifndef TINYGLTF_NO_STB_IMAGE
+// Declaration of default image loader callback
+bool LoadImageData(Image* image, const int image_idx, std::string* err,
+                   std::string* warn, int req_width, int req_height,
+                   const unsigned char* bytes, int size, void*);
+#endif
+
+#ifndef TINYGLTF_NO_STB_IMAGE_WRITE
+// Declaration of default image writer callback
+bool WriteImageData(const std::string* basepath, const std::string* filename,
+                    Image* image, bool embedImages, void*);
+#endif
+
+///
+/// FilExistsFunction type. Signature for custom filesystem callbacks.
+///
+typedef bool (*FileExistsFunction)(const std::string& abs_filename, void*);
+
+///
+/// ExpandFilePathFunction type. Signature for custom filesystem callbacks.
+///
+typedef std::string (*ExpandFilePathFunction)(const std::string&, void*);
+
+///
+/// ReadWholeFileFunction type. Signature for custom filesystem callbacks.
+///
+typedef bool (*ReadWholeFileFunction)(std::vector<unsigned char>*, std::string*,
+                                      const std::string&, void*);
+
+///
+/// WriteWholeFileFunction type. Signature for custom filesystem callbacks.
+///
+typedef bool (*WriteWholeFileFunction)(std::string*, const std::string&,
+                                       const std::vector<unsigned char>&,
+                                       void*);
+
+///
+/// A structure containing all required filesystem callbacks and a pointer to
+/// their user data.
+///
+struct FsCallbacks {
+    FileExistsFunction FileExists;
+    ExpandFilePathFunction ExpandFilePath;
+    ReadWholeFileFunction ReadWholeFile;
+    WriteWholeFileFunction WriteWholeFile;
+
+    void* user_data; // An argument that is passed to all fs callbacks
+};
+
+#ifndef TINYGLTF_NO_FS
+// Declaration of default filesystem callbacks
+
+bool FileExists(const std::string& abs_filename, void*);
+
+///
+/// Expand file path(e.g. `~` to home directory on posix, `%APPDATA%` to
+/// `C:\\Users\\tinygltf\\AppData`)
+///
+/// @param[in] filepath File path string. Assume UTF-8
+/// @param[in] userdata User data. Set to `nullptr` if you don't need it.
+///
+std::string ExpandFilePath(const std::string& filepath, void* userdata);
+
+bool ReadWholeFile(std::vector<unsigned char>* out, std::string* err,
+                   const std::string& filepath, void*);
+
+bool WriteWholeFile(std::string* err, const std::string& filepath,
+                    const std::vector<unsigned char>& contents, void*);
+#endif
+
+///
+/// glTF Parser/Serializer context.
+///
+class TinyGLTF {
+public:
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#endif
+
+    TinyGLTF() : bin_data_(nullptr), bin_size_(0), is_binary_(false) {}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+    ~TinyGLTF() {}
+
+    ///
+    /// Loads glTF ASCII asset from a file.
+    /// Set warning message to `warn` for example it fails to load asserts.
+    /// Returns false and set error string to `err` if there's an error.
+    ///
+    bool LoadASCIIFromFile(Model* model, std::string* err, std::string* warn,
+                           const std::string& filename,
+                           unsigned int check_sections = REQUIRE_VERSION);
+
+    ///
+    /// Loads glTF ASCII asset from string(memory).
+    /// `length` = strlen(str);
+    /// `base_dir` is a search path of glTF asset(e.g. images). Path Must be an
+    /// expanded path (e.g. no tilde(`~`), no environment variables). Set
+    /// warning message to `warn` for example it fails to load asserts. Returns
+    /// false and set error string to `err` if there's an error.
+    ///
+    bool LoadASCIIFromString(Model* model, std::string* err, std::string* warn,
+                             const char* str, const unsigned int length,
+                             const std::string& base_dir,
+                             unsigned int check_sections = REQUIRE_VERSION);
+
+    ///
+    /// Loads glTF binary asset from a file.
+    /// Set warning message to `warn` for example it fails to load asserts.
+    /// Returns false and set error string to `err` if there's an error.
+    ///
+    bool LoadBinaryFromFile(Model* model, std::string* err, std::string* warn,
+                            const std::string& filename,
+                            unsigned int check_sections = REQUIRE_VERSION);
+
+    ///
+    /// Loads glTF binary asset from memory.
+    /// `length` = strlen(str);
+    /// `base_dir` is a search path of glTF asset(e.g. images). Path Must be an
+    /// expanded path (e.g. no tilde(`~`), no environment variables).
+    /// Set warning message to `warn` for example it fails to load asserts.
+    /// Returns false and set error string to `err` if there's an error.
+    ///
+    bool LoadBinaryFromMemory(Model* model, std::string* err, std::string* warn,
+                              const unsigned char* bytes,
+                              const unsigned int length,
+                              const std::string& base_dir = "",
+                              unsigned int check_sections = REQUIRE_VERSION);
+
+    ///
+    /// Write glTF to stream, buffers and images will be embedded
+    ///
+    bool WriteGltfSceneToStream(Model* model, std::ostream& stream,
+                                bool prettyPrint, bool writeBinary);
+
+    ///
+    /// Write glTF to file.
+    ///
+    bool WriteGltfSceneToFile(Model* model, const std::string& filename,
+                              bool embedImages, bool embedBuffers,
+                              bool prettyPrint, bool writeBinary);
+
+    ///
+    /// Set callback to use for loading image data
+    ///
+    void SetImageLoader(LoadImageDataFunction LoadImageData, void* user_data);
+
+    ///
+    /// Unset(remove) callback of loading image data
+    ///
+    void RemoveImageLoader();
+
+    ///
+    /// Set callback to use for writing image data
+    ///
+    void SetImageWriter(WriteImageDataFunction WriteImageData, void* user_data);
+
+    ///
+    /// Set callbacks to use for filesystem (fs) access and their user data
+    ///
+    void SetFsCallbacks(FsCallbacks callbacks);
+
+    ///
+    /// Set serializing default values(default = false).
+    /// When true, default values are force serialized to .glTF.
+    /// This may be helpful if you want to serialize a full description of glTF
+    /// data.
+    ///
+    /// TODO(LTE): Supply parsing option as function arguments to
+    /// `LoadASCIIFromFile()` and others, not by a class method
+    ///
+    void SetSerializeDefaultValues(const bool enabled)
+    {
+        serialize_default_values_ = enabled;
+    }
+
+    bool GetSerializeDefaultValues() const { return serialize_default_values_; }
+
+    ///
+    /// Store original JSON string for `extras` and `extensions`.
+    /// This feature will be useful when the user want to reconstruct custom
+    /// data structure from JSON string.
+    ///
+    void SetStoreOriginalJSONForExtrasAndExtensions(const bool enabled)
+    {
+        store_original_json_for_extras_and_extensions_ = enabled;
+    }
+
+    bool GetStoreOriginalJSONForExtrasAndExtensions() const
+    {
+        return store_original_json_for_extras_and_extensions_;
+    }
+
+    ///
+    /// Specify whether preserve image channels when loading images or not.
+    /// (Not effective when the user supplies their own LoadImageData callbacks)
+    ///
+    void SetPreserveImageChannels(bool onoff)
+    {
+        preserve_image_channels_ = onoff;
+    }
+
+    bool GetPreserveImageChannels() const { return preserve_image_channels_; }
+
+private:
+    ///
+    /// Loads glTF asset from string(memory).
+    /// `length` = strlen(str);
+    /// Set warning message to `warn` for example it fails to load asserts
+    /// Returns false and set error string to `err` if there's an error.
+    ///
+    bool LoadFromString(Model* model, std::string* err, std::string* warn,
+                        const char* str, const unsigned int length,
+                        const std::string& base_dir,
+                        unsigned int check_sections);
+
+    const unsigned char* bin_data_ = nullptr;
+    size_t bin_size_ = 0;
+    bool is_binary_ = false;
+
+    bool serialize_default_values_ = false; ///< Serialize default values?
+
+    bool store_original_json_for_extras_and_extensions_ = false;
+
+    bool preserve_image_channels_ = false; /// Default false(expand channels to
+                                           /// RGBA) for backward compatibility.
+
+    // Warning & error messages
+    std::string warn_;
+    std::string err_;
+
+    FsCallbacks fs = {
+#ifndef TINYGLTF_NO_FS
+        &tinygltf::FileExists, &tinygltf::ExpandFilePath,
+        &tinygltf::ReadWholeFile, &tinygltf::WriteWholeFile,
+
+        nullptr // Fs callback user data
+#else
+        nullptr, nullptr, nullptr, nullptr,
+
+        nullptr // Fs callback user data
+#endif
+    };
+
+    LoadImageDataFunction LoadImageData =
+#ifndef TINYGLTF_NO_STB_IMAGE
+        &tinygltf::LoadImageData;
+#else
+        nullptr;
+#endif
+    void* load_image_user_data_{nullptr};
+    bool user_image_loader_{false};
+
+    WriteImageDataFunction WriteImageData =
+#ifndef TINYGLTF_NO_STB_IMAGE_WRITE
+        &tinygltf::WriteImageData;
+#else
+        nullptr;
+#endif
+    void* write_image_user_data_{nullptr};
+};
+
+#ifdef __clang__
+#pragma clang diagnostic pop // -Wpadded
+#endif
+
+} // namespace tinygltf
+
+#endif // TINY_GLTF_H_
+
+#if defined(TINYGLTF_IMPLEMENTATION) || defined(__INTELLISENSE__)
+#include <algorithm>
+// #include <cassert>
+#ifndef TINYGLTF_NO_FS
+#include <cstdio>
+#include <fstream>
+#endif
+#include <sstream>
+
+#ifdef __clang__
+// Disable some warnings for external files.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wfloat-equal"
+#pragma clang diagnostic ignored "-Wexit-time-destructors"
+#pragma clang diagnostic ignored "-Wconversion"
+#pragma clang diagnostic ignored "-Wold-style-cast"
+#pragma clang diagnostic ignored "-Wglobal-constructors"
+#if __has_warning("-Wreserved-id-macro")
+#pragma clang diagnostic ignored "-Wreserved-id-macro"
+#endif
+#pragma clang diagnostic ignored "-Wdisabled-macro-expansion"
+#pragma clang diagnostic ignored "-Wpadded"
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
+#pragma clang diagnostic ignored "-Wdocumentation-unknown-command"
+#pragma clang diagnostic ignored "-Wswitch-enum"
+#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
+#pragma clang diagnostic ignored "-Wweak-vtables"
+#pragma clang diagnostic ignored "-Wcovered-switch-default"
+#if __has_warning("-Wdouble-promotion")
+#pragma clang diagnostic ignored "-Wdouble-promotion"
+#endif
+#if __has_warning("-Wcomma")
+#pragma clang diagnostic ignored "-Wcomma"
+#endif
+#if __has_warning("-Wzero-as-null-pointer-constant")
+#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
+#endif
+#if __has_warning("-Wcast-qual")
+#pragma clang diagnostic ignored "-Wcast-qual"
+#endif
+#if __has_warning("-Wmissing-variable-declarations")
+#pragma clang diagnostic ignored "-Wmissing-variable-declarations"
+#endif
+#if __has_warning("-Wmissing-prototypes")
+#pragma clang diagnostic ignored "-Wmissing-prototypes"
+#endif
+#if __has_warning("-Wcast-align")
+#pragma clang diagnostic ignored "-Wcast-align"
+#endif
+#if __has_warning("-Wnewline-eof")
+#pragma clang diagnostic ignored "-Wnewline-eof"
+#endif
+#if __has_warning("-Wunused-parameter")
+#pragma clang diagnostic ignored "-Wunused-parameter"
+#endif
+#if __has_warning("-Wmismatched-tags")
+#pragma clang diagnostic ignored "-Wmismatched-tags"
+#endif
+#if __has_warning("-Wextra-semi-stmt")
+#pragma clang diagnostic ignored "-Wextra-semi-stmt"
+#endif
+#endif
+
+// Disable GCC warnings
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wtype-limits"
+#endif // __GNUC__
+
+#ifndef TINYGLTF_NO_INCLUDE_JSON
+#ifndef TINYGLTF_USE_RAPIDJSON
+#include "json.hpp"
+#else
+#ifndef TINYGLTF_NO_INCLUDE_RAPIDJSON
+#include "document.h"
+#include "prettywriter.h"
+#include "rapidjson.h"
+#include "stringbuffer.h"
+#include "writer.h"
+#endif
+#endif
+#endif
+
+#ifdef TINYGLTF_ENABLE_DRACO
+#include "draco/compression/decode.h"
+#include "draco/core/decoder_buffer.h"
+#endif
+
+#ifndef TINYGLTF_NO_STB_IMAGE
+#ifndef TINYGLTF_NO_INCLUDE_STB_IMAGE
+#include "stb_image.h"
+#endif
+#endif
+
+#ifndef TINYGLTF_NO_STB_IMAGE_WRITE
+#ifndef TINYGLTF_NO_INCLUDE_STB_IMAGE_WRITE
+#include "stb_image_write.h"
+#endif
+#endif
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
+#ifdef _WIN32
+
+// issue 143.
+// Define NOMINMAX to avoid min/max defines,
+// but undef it after included Windows.h
+#ifndef NOMINMAX
+#define TINYGLTF_INTERNAL_NOMINMAX
+#define NOMINMAX
+#endif
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#define TINYGLTF_INTERNAL_WIN32_LEAN_AND_MEAN
+#endif
+#ifndef __MINGW32__
+#include <Windows.h> // include API for expanding a file path
+#else
+#include <windows.h>
+#endif
+
+#ifdef TINYGLTF_INTERNAL_WIN32_LEAN_AND_MEAN
+#undef WIN32_LEAN_AND_MEAN
+#endif
+
+#if defined(TINYGLTF_INTERNAL_NOMINMAX)
+#undef NOMINMAX
+#endif
+
+#if defined(__GLIBCXX__) // mingw
+
+#include <fcntl.h> // _O_RDONLY
+
+#include <ext/stdio_filebuf.h> // fstream (all sorts of IO stuff) + stdio_filebuf (=streambuf)
+
+#endif
+
+#elif !defined(__ANDROID__) && !defined(__OpenBSD__)
+// #include <wordexp.h>
+#endif
+
+#if defined(__sparcv9) || defined(__powerpc__)
+// Big endian
+#else
+#if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || MINIZ_X86_OR_X64_CPU
+#define TINYGLTF_LITTLE_ENDIAN 1
+#endif
+#endif
+
+namespace {
+#ifdef TINYGLTF_USE_RAPIDJSON
+
+#ifdef TINYGLTF_USE_RAPIDJSON_CRTALLOCATOR
+// This uses the RapidJSON CRTAllocator.  It is thread safe and multiple
+// documents may be active at once.
+using json =
+    rapidjson::GenericValue<rapidjson::UTF8<>, rapidjson::CrtAllocator>;
+using json_const_iterator = json::ConstMemberIterator;
+using json_const_array_iterator = json const*;
+using JsonDocument =
+    rapidjson::GenericDocument<rapidjson::UTF8<>, rapidjson::CrtAllocator>;
+rapidjson::CrtAllocator s_CrtAllocator; // stateless and thread safe
+rapidjson::CrtAllocator& GetAllocator() { return s_CrtAllocator; }
+#else
+// This uses the default RapidJSON MemoryPoolAllocator.  It is very fast, but
+// not thread safe. Only a single JsonDocument may be active at any one time,
+// meaning only a single gltf load/save can be active any one time.
+using json = rapidjson::Value;
+using json_const_iterator = json::ConstMemberIterator;
+using json_const_array_iterator = json const*;
+rapidjson::Document* s_pActiveDocument = nullptr;
+rapidjson::Document::AllocatorType& GetAllocator()
+{
+    assert(s_pActiveDocument); // Root json node must be JsonDocument type
+    return s_pActiveDocument->GetAllocator();
+}
+
+#ifdef __clang__
+#pragma clang diagnostic push
+// Suppress JsonDocument(JsonDocument &&rhs) noexcept
+#pragma clang diagnostic ignored "-Wunused-member-function"
+#endif
+
+struct JsonDocument : public rapidjson::Document {
+    JsonDocument()
+    {
+        assert(s_pActiveDocument ==
+               nullptr); // When using default allocator, only one document can
+                         // be active at a time, if you need multiple active at
+                         // once, define TINYGLTF_USE_RAPIDJSON_CRTALLOCATOR
+        s_pActiveDocument = this;
+    }
+    JsonDocument(const JsonDocument&) = delete;
+    JsonDocument(JsonDocument&& rhs) noexcept
+        : rapidjson::Document(std::move(rhs))
+    {
+        s_pActiveDocument = this;
+        rhs.isNil = true;
+    }
+    ~JsonDocument()
+    {
+        if (!isNil) {
+            s_pActiveDocument = nullptr;
+        }
+    }
+
+private:
+    bool isNil = false;
+};
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+#endif // TINYGLTF_USE_RAPIDJSON_CRTALLOCATOR
+
+#else
+using nlohmann::json;
+using json_const_iterator = json::const_iterator;
+using json_const_array_iterator = json_const_iterator;
+using JsonDocument = json;
+#endif
+
+void JsonParse(JsonDocument& doc, const char* str, size_t length,
+               bool throwExc = false)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    (void)throwExc;
+    doc.Parse(str, length);
+#else
+    doc = json::parse(str, str + length, nullptr, throwExc);
+#endif
+}
+} // namespace
+
+#ifdef __APPLE__
+#include "TargetConditionals.h"
+#endif
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#endif
+
+namespace tinygltf {
+
+///
+/// Internal LoadImageDataOption struct.
+/// This struct is passed through `user_pointer` in LoadImageData.
+/// The struct is not passed when the user supply their own LoadImageData
+/// callbacks.
+///
+struct LoadImageDataOption {
+    // true: preserve image channels(e.g. load as RGB image if the image has RGB
+    // channels) default `false`(channels are expanded to RGBA for backward
+    // compatibility).
+    bool preserve_channels{false};
+};
+
+// Equals function for Value, for recursivity
+static bool Equals(const tinygltf::Value& one, const tinygltf::Value& other)
+{
+    if (one.Type() != other.Type())
+        return false;
+
+    switch (one.Type()) {
+    case NULL_TYPE:
+        return true;
+    case BOOL_TYPE:
+        return one.Get<bool>() == other.Get<bool>();
+    case REAL_TYPE:
+        return TINYGLTF_DOUBLE_EQUAL(one.Get<double>(), other.Get<double>());
+    case INT_TYPE:
+        return one.Get<int>() == other.Get<int>();
+    case OBJECT_TYPE: {
+        auto oneObj = one.Get<tinygltf::Value::Object>();
+        auto otherObj = other.Get<tinygltf::Value::Object>();
+        if (oneObj.size() != otherObj.size())
+            return false;
+        for (auto& it : oneObj) {
+            auto otherIt = otherObj.find(it.first);
+            if (otherIt == otherObj.end())
+                return false;
+
+            if (!Equals(it.second, otherIt->second))
+                return false;
+        }
+        return true;
+    }
+    case ARRAY_TYPE: {
+        if (one.Size() != other.Size())
+            return false;
+        for (int i = 0; i < int(one.Size()); ++i)
+            if (!Equals(one.Get(i), other.Get(i)))
+                return false;
+        return true;
+    }
+    case STRING_TYPE:
+        return one.Get<std::string>() == other.Get<std::string>();
+    case BINARY_TYPE:
+        return one.Get<std::vector<unsigned char>>() ==
+               other.Get<std::vector<unsigned char>>();
+    default: {
+        // unhandled type
+        return false;
+    }
+    }
+}
+
+// Equals function for std::vector<double> using TINYGLTF_DOUBLE_EPSILON
+static bool Equals(const std::vector<double>& one,
+                   const std::vector<double>& other)
+{
+    if (one.size() != other.size())
+        return false;
+    for (int i = 0; i < int(one.size()); ++i) {
+        if (!TINYGLTF_DOUBLE_EQUAL(one[size_t(i)], other[size_t(i)]))
+            return false;
+    }
+    return true;
+}
+
+bool Accessor::operator==(const Accessor& other) const
+{
+    return this->bufferView == other.bufferView &&
+           this->byteOffset == other.byteOffset &&
+           this->componentType == other.componentType &&
+           this->count == other.count && this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           Equals(this->maxValues, other.maxValues) &&
+           Equals(this->minValues, other.minValues) &&
+           this->name == other.name && this->normalized == other.normalized &&
+           this->type == other.type;
+}
+bool Animation::operator==(const Animation& other) const
+{
+    return this->channels == other.channels &&
+           this->extensions == other.extensions &&
+           this->extras == other.extras && this->name == other.name &&
+           this->samplers == other.samplers;
+}
+bool AnimationChannel::operator==(const AnimationChannel& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           this->target_node == other.target_node &&
+           this->target_path == other.target_path &&
+           this->sampler == other.sampler;
+}
+bool AnimationSampler::operator==(const AnimationSampler& other) const
+{
+    return this->extras == other.extras &&
+           this->extensions == other.extensions && this->input == other.input &&
+           this->interpolation == other.interpolation &&
+           this->output == other.output;
+}
+bool Asset::operator==(const Asset& other) const
+{
+    return this->copyright == other.copyright &&
+           this->extensions == other.extensions &&
+           this->extras == other.extras && this->generator == other.generator &&
+           this->minVersion == other.minVersion &&
+           this->version == other.version;
+}
+bool Buffer::operator==(const Buffer& other) const
+{
+    return this->data == other.data && this->extensions == other.extensions &&
+           this->extras == other.extras && this->name == other.name &&
+           this->uri == other.uri;
+}
+bool BufferView::operator==(const BufferView& other) const
+{
+    return this->buffer == other.buffer &&
+           this->byteLength == other.byteLength &&
+           this->byteOffset == other.byteOffset &&
+           this->byteStride == other.byteStride && this->name == other.name &&
+           this->target == other.target &&
+           this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           this->dracoDecoded == other.dracoDecoded;
+}
+bool Camera::operator==(const Camera& other) const
+{
+    return this->name == other.name && this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           this->orthographic == other.orthographic &&
+           this->perspective == other.perspective && this->type == other.type;
+}
+bool Image::operator==(const Image& other) const
+{
+    return this->bufferView == other.bufferView &&
+           this->component == other.component &&
+           this->extensions == other.extensions &&
+           this->extras == other.extras && this->height == other.height &&
+           this->image == other.image && this->mimeType == other.mimeType &&
+           this->name == other.name && this->uri == other.uri &&
+           this->width == other.width;
+}
+bool Light::operator==(const Light& other) const
+{
+    return Equals(this->color, other.color) && this->name == other.name &&
+           this->type == other.type;
+}
+bool Material::operator==(const Material& other) const
+{
+    return (this->pbrMetallicRoughness == other.pbrMetallicRoughness) &&
+           (this->normalTexture == other.normalTexture) &&
+           (this->occlusionTexture == other.occlusionTexture) &&
+           (this->emissiveTexture == other.emissiveTexture) &&
+           Equals(this->emissiveFactor, other.emissiveFactor) &&
+           (this->alphaMode == other.alphaMode) &&
+           TINYGLTF_DOUBLE_EQUAL(this->alphaCutoff, other.alphaCutoff) &&
+           (this->doubleSided == other.doubleSided) &&
+           (this->extensions == other.extensions) &&
+           (this->extras == other.extras) && (this->values == other.values) &&
+           (this->additionalValues == other.additionalValues) &&
+           (this->name == other.name);
+}
+bool Mesh::operator==(const Mesh& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras && this->name == other.name &&
+           Equals(this->weights, other.weights) &&
+           this->primitives == other.primitives;
+}
+bool Model::operator==(const Model& other) const
+{
+    return this->accessors == other.accessors &&
+           this->animations == other.animations && this->asset == other.asset &&
+           this->buffers == other.buffers &&
+           this->bufferViews == other.bufferViews &&
+           this->cameras == other.cameras &&
+           this->defaultScene == other.defaultScene &&
+           this->extensions == other.extensions &&
+           this->extensionsRequired == other.extensionsRequired &&
+           this->extensionsUsed == other.extensionsUsed &&
+           this->extras == other.extras && this->images == other.images &&
+           this->lights == other.lights && this->materials == other.materials &&
+           this->meshes == other.meshes && this->nodes == other.nodes &&
+           this->samplers == other.samplers && this->scenes == other.scenes &&
+           this->skins == other.skins && this->textures == other.textures;
+}
+bool Node::operator==(const Node& other) const
+{
+    return this->camera == other.camera && this->children == other.children &&
+           this->extensions == other.extensions &&
+           this->extras == other.extras && Equals(this->matrix, other.matrix) &&
+           this->mesh == other.mesh && this->name == other.name &&
+           Equals(this->rotation, other.rotation) &&
+           Equals(this->scale, other.scale) && this->skin == other.skin &&
+           Equals(this->translation, other.translation) &&
+           Equals(this->weights, other.weights);
+}
+bool SpotLight::operator==(const SpotLight& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           TINYGLTF_DOUBLE_EQUAL(this->innerConeAngle, other.innerConeAngle) &&
+           TINYGLTF_DOUBLE_EQUAL(this->outerConeAngle, other.outerConeAngle);
+}
+bool OrthographicCamera::operator==(const OrthographicCamera& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           TINYGLTF_DOUBLE_EQUAL(this->xmag, other.xmag) &&
+           TINYGLTF_DOUBLE_EQUAL(this->ymag, other.ymag) &&
+           TINYGLTF_DOUBLE_EQUAL(this->zfar, other.zfar) &&
+           TINYGLTF_DOUBLE_EQUAL(this->znear, other.znear);
+}
+bool Parameter::operator==(const Parameter& other) const
+{
+    if (this->bool_value != other.bool_value ||
+        this->has_number_value != other.has_number_value)
+        return false;
+
+    if (!TINYGLTF_DOUBLE_EQUAL(this->number_value, other.number_value))
+        return false;
+
+    if (this->json_double_value.size() != other.json_double_value.size())
+        return false;
+    for (auto& it : this->json_double_value) {
+        auto otherIt = other.json_double_value.find(it.first);
+        if (otherIt == other.json_double_value.end())
+            return false;
+
+        if (!TINYGLTF_DOUBLE_EQUAL(it.second, otherIt->second))
+            return false;
+    }
+
+    if (!Equals(this->number_array, other.number_array))
+        return false;
+
+    if (this->string_value != other.string_value)
+        return false;
+
+    return true;
+}
+bool PerspectiveCamera::operator==(const PerspectiveCamera& other) const
+{
+    return TINYGLTF_DOUBLE_EQUAL(this->aspectRatio, other.aspectRatio) &&
+           this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           TINYGLTF_DOUBLE_EQUAL(this->yfov, other.yfov) &&
+           TINYGLTF_DOUBLE_EQUAL(this->zfar, other.zfar) &&
+           TINYGLTF_DOUBLE_EQUAL(this->znear, other.znear);
+}
+bool Primitive::operator==(const Primitive& other) const
+{
+    return this->attributes == other.attributes &&
+           this->extras == other.extras && this->indices == other.indices &&
+           this->material == other.material && this->mode == other.mode &&
+           this->targets == other.targets;
+}
+bool Sampler::operator==(const Sampler& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras && this->magFilter == other.magFilter &&
+           this->minFilter == other.minFilter && this->name == other.name &&
+           this->wrapS == other.wrapS && this->wrapT == other.wrapT;
+
+    // this->wrapR == other.wrapR
+}
+bool Scene::operator==(const Scene& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras && this->name == other.name &&
+           this->nodes == other.nodes;
+}
+bool Skin::operator==(const Skin& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           this->inverseBindMatrices == other.inverseBindMatrices &&
+           this->joints == other.joints && this->name == other.name &&
+           this->skeleton == other.skeleton;
+}
+bool Texture::operator==(const Texture& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras && this->name == other.name &&
+           this->sampler == other.sampler && this->source == other.source;
+}
+bool TextureInfo::operator==(const TextureInfo& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras && this->index == other.index &&
+           this->texCoord == other.texCoord;
+}
+bool NormalTextureInfo::operator==(const NormalTextureInfo& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras && this->index == other.index &&
+           this->texCoord == other.texCoord &&
+           TINYGLTF_DOUBLE_EQUAL(this->scale, other.scale);
+}
+bool OcclusionTextureInfo::operator==(const OcclusionTextureInfo& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras && this->index == other.index &&
+           this->texCoord == other.texCoord &&
+           TINYGLTF_DOUBLE_EQUAL(this->strength, other.strength);
+}
+bool PbrMetallicRoughness::operator==(const PbrMetallicRoughness& other) const
+{
+    return this->extensions == other.extensions &&
+           this->extras == other.extras &&
+           (this->baseColorTexture == other.baseColorTexture) &&
+           (this->metallicRoughnessTexture == other.metallicRoughnessTexture) &&
+           Equals(this->baseColorFactor, other.baseColorFactor) &&
+           TINYGLTF_DOUBLE_EQUAL(this->metallicFactor, other.metallicFactor) &&
+           TINYGLTF_DOUBLE_EQUAL(this->roughnessFactor, other.roughnessFactor);
+}
+bool Value::operator==(const Value& other) const
+{
+    return Equals(*this, other);
+}
+
+static void swap4(unsigned int* val)
+{
+#ifdef TINYGLTF_LITTLE_ENDIAN
+    (void)val;
+#else
+    unsigned int tmp = *val;
+    unsigned char* dst = reinterpret_cast<unsigned char*>(val);
+    unsigned char* src = reinterpret_cast<unsigned char*>(&tmp);
+
+    dst[0] = src[3];
+    dst[1] = src[2];
+    dst[2] = src[1];
+    dst[3] = src[0];
+#endif
+}
+
+static std::string JoinPath(const std::string& path0, const std::string& path1)
+{
+    if (path0.empty()) {
+        return path1;
+    }
+    else {
+        // check '/'
+        char lastChar = *path0.rbegin();
+        if (lastChar != '/') {
+            return path0 + std::string("/") + path1;
+        }
+        else {
+            return path0 + path1;
+        }
+    }
+}
+
+static std::string FindFile(const std::vector<std::string>& paths,
+                            const std::string& filepath, FsCallbacks* fs)
+{
+    if (fs == nullptr || fs->ExpandFilePath == nullptr ||
+        fs->FileExists == nullptr) {
+        // Error, fs callback[s] missing
+        return std::string();
+    }
+
+    for (size_t i = 0; i < paths.size(); i++) {
+        std::string absPath =
+            fs->ExpandFilePath(JoinPath(paths[i], filepath), fs->user_data);
+        if (fs->FileExists(absPath, fs->user_data)) {
+            return absPath;
+        }
+    }
+
+    return std::string();
+}
+
+static std::string GetFilePathExtension(const std::string& FileName)
+{
+    if (FileName.find_last_of(".") != std::string::npos)
+        return FileName.substr(FileName.find_last_of(".") + 1);
+    return "";
+}
+
+static std::string GetBaseDir(const std::string& filepath)
+{
+    if (filepath.find_last_of("/\\") != std::string::npos)
+        return filepath.substr(0, filepath.find_last_of("/\\"));
+    return "";
+}
+
+static std::string GetBaseFilename(const std::string& filepath)
+{
+    auto idx = filepath.find_last_of("/\\");
+    if (idx != std::string::npos)
+        return filepath.substr(idx + 1);
+    return filepath;
+}
+
+std::string base64_encode(unsigned char const*, unsigned int len);
+std::string base64_decode(std::string const& s);
+
+/*
+   base64.cpp and base64.h
+
+   Copyright (C) 2004-2008 René Nyffenegger
+
+   This source code is provided 'as-is', without any express or implied
+   warranty. In no event will the author be held liable for any damages
+   arising from the use of this software.
+
+   Permission is granted to anyone to use this software for any purpose,
+   including commercial applications, and to alter it and redistribute it
+   freely, subject to the following restrictions:
+
+   1. The origin of this source code must not be misrepresented; you must not
+      claim that you wrote the original source code. If you use this source code
+      in a product, an acknowledgment in the product documentation would be
+      appreciated but is not required.
+
+   2. Altered source versions must be plainly marked as such, and must not be
+      misrepresented as being the original source code.
+
+   3. This notice may not be removed or altered from any source distribution.
+
+   René Nyffenegger rene.nyffenegger@adp-gmbh.ch
+
+*/
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wsign-conversion"
+#pragma clang diagnostic ignored "-Wconversion"
+#endif
+
+static inline bool is_base64(unsigned char c)
+{
+    return (isalnum(c) || (c == '+') || (c == '/'));
+}
+
+std::string base64_encode(unsigned char const* bytes_to_encode,
+                          unsigned int in_len)
+{
+    std::string ret;
+    int i = 0;
+    int j = 0;
+    unsigned char char_array_3[3];
+    unsigned char char_array_4[4];
+
+    const char* base64_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                               "abcdefghijklmnopqrstuvwxyz"
+                               "0123456789+/";
+
+    while (in_len--) {
+        char_array_3[i++] = *(bytes_to_encode++);
+        if (i == 3) {
+            char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+            char_array_4[1] = ((char_array_3[0] & 0x03) << 4) +
+                              ((char_array_3[1] & 0xf0) >> 4);
+            char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) +
+                              ((char_array_3[2] & 0xc0) >> 6);
+            char_array_4[3] = char_array_3[2] & 0x3f;
+
+            for (i = 0; (i < 4); i++)
+                ret += base64_chars[char_array_4[i]];
+            i = 0;
+        }
+    }
+
+    if (i) {
+        for (j = i; j < 3; j++)
+            char_array_3[j] = '\0';
+
+        char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+        char_array_4[1] =
+            ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
+        char_array_4[2] =
+            ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
+
+        for (j = 0; (j < i + 1); j++)
+            ret += base64_chars[char_array_4[j]];
+
+        while ((i++ < 3))
+            ret += '=';
+    }
+
+    return ret;
+}
+
+std::string base64_decode(std::string const& encoded_string)
+{
+    int in_len = static_cast<int>(encoded_string.size());
+    int i = 0;
+    int j = 0;
+    int in_ = 0;
+    unsigned char char_array_4[4], char_array_3[3];
+    std::string ret;
+
+    const std::string base64_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                                     "abcdefghijklmnopqrstuvwxyz"
+                                     "0123456789+/";
+
+    while (in_len-- && (encoded_string[in_] != '=') &&
+           is_base64(encoded_string[in_])) {
+        char_array_4[i++] = encoded_string[in_];
+        in_++;
+        if (i == 4) {
+            for (i = 0; i < 4; i++)
+                char_array_4[i] = static_cast<unsigned char>(
+                    base64_chars.find(char_array_4[i]));
+
+            char_array_3[0] =
+                (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
+            char_array_3[1] = ((char_array_4[1] & 0xf) << 4) +
+                              ((char_array_4[2] & 0x3c) >> 2);
+            char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
+
+            for (i = 0; (i < 3); i++)
+                ret += char_array_3[i];
+            i = 0;
+        }
+    }
+
+    if (i) {
+        for (j = i; j < 4; j++)
+            char_array_4[j] = 0;
+
+        for (j = 0; j < 4; j++)
+            char_array_4[j] =
+                static_cast<unsigned char>(base64_chars.find(char_array_4[j]));
+
+        char_array_3[0] =
+            (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
+        char_array_3[1] =
+            ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
+        char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
+
+        for (j = 0; (j < i - 1); j++)
+            ret += char_array_3[j];
+    }
+
+    return ret;
+}
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+// https://github.com/syoyo/tinygltf/issues/228
+// TODO(syoyo): Use uriparser https://uriparser.github.io/ for stricter Uri
+// decoding?
+//
+// Uri Decoding from DLIB
+// http://dlib.net/dlib/server/server_http.cpp.html
+// --- dlib begin ------------------------------------------------------------
+// Copyright (C) 2003  Davis E. King (davis@dlib.net)
+// License: Boost Software License
+// Boost Software License - Version 1.0 - August 17th, 2003
+
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+namespace dlib {
+
+inline unsigned char from_hex(unsigned char ch)
+{
+    if (ch <= '9' && ch >= '0')
+        ch -= '0';
+    else if (ch <= 'f' && ch >= 'a')
+        ch -= 'a' - 10;
+    else if (ch <= 'F' && ch >= 'A')
+        ch -= 'A' - 10;
+    else
+        ch = 0;
+    return ch;
+}
+
+static const std::string urldecode(const std::string& str)
+{
+    using namespace std;
+    string result;
+    string::size_type i;
+    for (i = 0; i < str.size(); ++i) {
+        if (str[i] == '+') {
+            result += ' ';
+        }
+        else if (str[i] == '%' && str.size() > i + 2) {
+            const unsigned char ch1 =
+                from_hex(static_cast<unsigned char>(str[i + 1]));
+            const unsigned char ch2 =
+                from_hex(static_cast<unsigned char>(str[i + 2]));
+            const unsigned char ch =
+                static_cast<unsigned char>((ch1 << 4) | ch2);
+            result += static_cast<char>(ch);
+            i += 2;
+        }
+        else {
+            result += str[i];
+        }
+    }
+    return result;
+}
+
+} // namespace dlib
+// --- dlib end --------------------------------------------------------------
+
+static bool LoadExternalFile(std::vector<unsigned char>* out, std::string* err,
+                             std::string* warn, const std::string& filename,
+                             const std::string& basedir, bool required,
+                             size_t reqBytes, bool checkSize, FsCallbacks* fs)
+{
+    if (fs == nullptr || fs->FileExists == nullptr ||
+        fs->ExpandFilePath == nullptr || fs->ReadWholeFile == nullptr) {
+        // This is a developer error, assert() ?
+        if (err) {
+            (*err) += "FS callback[s] not set\n";
+        }
+        return false;
+    }
+
+    std::string* failMsgOut = required ? err : warn;
+
+    out->clear();
+
+    std::vector<std::string> paths;
+    paths.push_back(basedir);
+    paths.push_back(".");
+
+    std::string filepath = FindFile(paths, filename, fs);
+    if (filepath.empty() || filename.empty()) {
+        if (failMsgOut) {
+            (*failMsgOut) += "File not found : " + filename + "\n";
+        }
+        return false;
+    }
+
+    std::vector<unsigned char> buf;
+    std::string fileReadErr;
+    bool fileRead =
+        fs->ReadWholeFile(&buf, &fileReadErr, filepath, fs->user_data);
+    if (!fileRead) {
+        if (failMsgOut) {
+            (*failMsgOut) +=
+                "File read error : " + filepath + " : " + fileReadErr + "\n";
+        }
+        return false;
+    }
+
+    size_t sz = buf.size();
+    if (sz == 0) {
+        if (failMsgOut) {
+            (*failMsgOut) += "File is empty : " + filepath + "\n";
+        }
+        return false;
+    }
+
+    if (checkSize) {
+        if (reqBytes == sz) {
+            out->swap(buf);
+            return true;
+        }
+        else {
+            std::stringstream ss;
+            ss << "File size mismatch : " << filepath << ", requestedBytes "
+               << reqBytes << ", but got " << sz << std::endl;
+            if (failMsgOut) {
+                (*failMsgOut) += ss.str();
+            }
+            return false;
+        }
+    }
+
+    out->swap(buf);
+    return true;
+}
+
+void TinyGLTF::SetImageLoader(LoadImageDataFunction func, void* user_data)
+{
+    LoadImageData = func;
+    load_image_user_data_ = user_data;
+    user_image_loader_ = true;
+}
+
+void TinyGLTF::RemoveImageLoader()
+{
+    LoadImageData =
+#ifndef TINYGLTF_NO_STB_IMAGE
+        &tinygltf::LoadImageData;
+#else
+        nullptr;
+#endif
+
+    load_image_user_data_ = nullptr;
+    user_image_loader_ = false;
+}
+
+#ifndef TINYGLTF_NO_STB_IMAGE
+bool LoadImageData(Image* image, const int image_idx, std::string* err,
+                   std::string* warn, int req_width, int req_height,
+                   const unsigned char* bytes, int size, void* user_data)
+{
+    (void)warn;
+
+    LoadImageDataOption option;
+    if (user_data) {
+        option = *reinterpret_cast<LoadImageDataOption*>(user_data);
+    }
+
+    int w = 0, h = 0, comp = 0, req_comp = 0;
+
+    unsigned char* data = nullptr;
+
+    // preserve_channels true: Use channels stored in the image file.
+    // false: force 32-bit textures for common Vulkan compatibility. It appears
+    // that some GPU drivers do not support 24-bit images for Vulkan
+    req_comp = option.preserve_channels ? 0 : 4;
+    int bits = 8;
+    int pixel_type = TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE;
+
+    // It is possible that the image we want to load is a 16bit per channel
+    // image We are going to attempt to load it as 16bit per channel, and if it
+    // worked, set the image data accordingly. We are casting the returned
+    // pointer into unsigned char, because we are representing "bytes". But we
+    // are updating the Image metadata to signal that this image uses 2 bytes
+    // (16bits) per channel:
+    if (stbi_is_16_bit_from_memory(bytes, size)) {
+        data = reinterpret_cast<unsigned char*>(
+            stbi_load_16_from_memory(bytes, size, &w, &h, &comp, req_comp));
+        if (data) {
+            bits = 16;
+            pixel_type = TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT;
+        }
+    }
+
+    // at this point, if data is still NULL, it means that the image wasn't
+    // 16bit per channel, we are going to load it as a normal 8bit per channel
+    // image as we used to do:
+    // if image cannot be decoded, ignore parsing and keep it by its path
+    // don't break in this case
+    // FIXME we should only enter this function if the image is embedded. If
+    // image->uri references
+    // an image file, it should be left as it is. Image loading should not be
+    // mandatory (to support other formats)
+    if (!data)
+        data = stbi_load_from_memory(bytes, size, &w, &h, &comp, req_comp);
+    if (!data) {
+        // NOTE: you can use `warn` instead of `err`
+        if (err) {
+            (*err) += "Unknown image format. STB cannot decode image data for "
+                      "image[" +
+                      std::to_string(image_idx) + "] name = \"" + image->name +
+                      "\".\n";
+        }
+        return false;
+    }
+
+    if ((w < 1) || (h < 1)) {
+        stbi_image_free(data);
+        if (err) {
+            (*err) += "Invalid image data for image[" +
+                      std::to_string(image_idx) + "] name = \"" + image->name +
+                      "\"\n";
+        }
+        return false;
+    }
+
+    if (req_width > 0) {
+        if (req_width != w) {
+            stbi_image_free(data);
+            if (err) {
+                (*err) += "Image width mismatch for image[" +
+                          std::to_string(image_idx) + "] name = \"" +
+                          image->name + "\"\n";
+            }
+            return false;
+        }
+    }
+
+    if (req_height > 0) {
+        if (req_height != h) {
+            stbi_image_free(data);
+            if (err) {
+                (*err) += "Image height mismatch. for image[" +
+                          std::to_string(image_idx) + "] name = \"" +
+                          image->name + "\"\n";
+            }
+            return false;
+        }
+    }
+
+    if (req_comp != 0) {
+        // loaded data has `req_comp` channels(components)
+        comp = req_comp;
+    }
+
+    image->width = w;
+    image->height = h;
+    image->component = comp;
+    image->bits = bits;
+    image->pixel_type = pixel_type;
+    image->image.resize(static_cast<size_t>(w * h * comp) * size_t(bits / 8));
+    std::copy(data, data + w * h * comp * (bits / 8), image->image.begin());
+    stbi_image_free(data);
+
+    return true;
+}
+#endif
+
+void TinyGLTF::SetImageWriter(WriteImageDataFunction func, void* user_data)
+{
+    WriteImageData = func;
+    write_image_user_data_ = user_data;
+}
+
+#ifndef TINYGLTF_NO_STB_IMAGE_WRITE
+static void WriteToMemory_stbi(void* context, void* data, int size)
+{
+    std::vector<unsigned char>* buffer =
+        reinterpret_cast<std::vector<unsigned char>*>(context);
+
+    unsigned char* pData = reinterpret_cast<unsigned char*>(data);
+
+    buffer->insert(buffer->end(), pData, pData + size);
+}
+
+bool WriteImageData(const std::string* basepath, const std::string* filename,
+                    Image* image, bool embedImages, void* fsPtr)
+{
+    const std::string ext = GetFilePathExtension(*filename);
+
+    // Write image to temporary buffer
+    std::string header;
+    std::vector<unsigned char> data;
+
+    if (ext == "png") {
+        if ((image->bits != 8) ||
+            (image->pixel_type != TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE)) {
+            // Unsupported pixel format
+            return false;
+        }
+
+        if (!stbi_write_png_to_func(WriteToMemory_stbi, &data, image->width,
+                                    image->height, image->component,
+                                    &image->image[0], 0)) {
+            return false;
+        }
+        header = "data:image/png;base64,";
+    }
+    else if (ext == "jpg") {
+        if (!stbi_write_jpg_to_func(WriteToMemory_stbi, &data, image->width,
+                                    image->height, image->component,
+                                    &image->image[0], 100)) {
+            return false;
+        }
+        header = "data:image/jpeg;base64,";
+    }
+    else if (ext == "bmp") {
+        if (!stbi_write_bmp_to_func(WriteToMemory_stbi, &data, image->width,
+                                    image->height, image->component,
+                                    &image->image[0])) {
+            return false;
+        }
+        header = "data:image/bmp;base64,";
+    }
+    else if (!embedImages) {
+        // Error: can't output requested format to file
+        return false;
+    }
+
+    if (embedImages) {
+        // Embed base64-encoded image into URI
+        if (data.size()) {
+            image->uri =
+                header +
+                base64_encode(&data[0], static_cast<unsigned int>(data.size()));
+        }
+        else {
+            // Throw error?
+        }
+    }
+    else {
+        // Write image to disc
+        FsCallbacks* fs = reinterpret_cast<FsCallbacks*>(fsPtr);
+        if ((fs != nullptr) && (fs->WriteWholeFile != nullptr)) {
+            const std::string imagefilepath = JoinPath(*basepath, *filename);
+            std::string writeError;
+            if (!fs->WriteWholeFile(&writeError, imagefilepath, data,
+                                    fs->user_data)) {
+                // Could not write image file to disc; Throw error ?
+                return false;
+            }
+        }
+        else {
+            // Throw error?
+        }
+        image->uri = *filename;
+    }
+
+    return true;
+}
+#endif
+
+void TinyGLTF::SetFsCallbacks(FsCallbacks callbacks) { fs = callbacks; }
+
+#ifdef _WIN32
+static inline std::wstring UTF8ToWchar(const std::string& str)
+{
+    int wstr_size = MultiByteToWideChar(CP_UTF8, 0, str.data(), (int)str.size(),
+                                        nullptr, 0);
+    std::wstring wstr((size_t)wstr_size, 0);
+    MultiByteToWideChar(CP_UTF8, 0, str.data(), (int)str.size(), &wstr[0],
+                        (int)wstr.size());
+    return wstr;
+}
+
+static inline std::string WcharToUTF8(const std::wstring& wstr)
+{
+    int str_size =
+        WideCharToMultiByte(CP_UTF8, 0, wstr.data(), (int)wstr.size(), nullptr,
+                            0, nullptr, nullptr);
+    std::string str((size_t)str_size, 0);
+    WideCharToMultiByte(CP_UTF8, 0, wstr.data(), (int)wstr.size(), &str[0],
+                        (int)str.size(), nullptr, nullptr);
+    return str;
+}
+#endif
+
+#ifndef TINYGLTF_NO_FS
+// Default implementations of filesystem functions
+
+bool FileExists(const std::string& abs_filename, void*)
+{
+    bool ret;
+#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS
+    if (asset_manager) {
+        AAsset* asset = AAssetManager_open(asset_manager, abs_filename.c_str(),
+                                           AASSET_MODE_STREAMING);
+        if (!asset) {
+            return false;
+        }
+        AAsset_close(asset);
+        ret = true;
+    }
+    else {
+        return false;
+    }
+#else
+#ifdef _WIN32
+#if defined(_MSC_VER) || defined(__GLIBCXX__) || defined(_LIBCPP_VERSION)
+    FILE* fp = nullptr;
+    errno_t err = _wfopen_s(&fp, UTF8ToWchar(abs_filename).c_str(), L"rb");
+    if (err != 0) {
+        return false;
+    }
+#else
+    FILE* fp = nullptr;
+    errno_t err = fopen_s(&fp, abs_filename.c_str(), "rb");
+    if (err != 0) {
+        return false;
+    }
+#endif
+
+#else
+    FILE* fp = fopen(abs_filename.c_str(), "rb");
+#endif
+    if (fp) {
+        ret = true;
+        fclose(fp);
+    }
+    else {
+        ret = false;
+    }
+#endif
+
+    return ret;
+}
+
+std::string ExpandFilePath(const std::string& filepath, void*)
+{
+    // https://github.com/syoyo/tinygltf/issues/368
+    //
+    // No file path expansion in built-in FS function anymore, since glTF URI
+    // should not contain tilde('~') and environment variables, and for security
+    // reason(`wordexp`).
+    //
+    // Users need to supply `base_dir`(in `LoadASCIIFromString`,
+    // `LoadBinaryFromMemory`) in expanded absolute path.
+
+    return filepath;
+
+#if 0
+#ifdef _WIN32
+  // Assume input `filepath` is encoded in UTF-8
+  std::wstring wfilepath = UTF8ToWchar(filepath);
+  DWORD wlen = ExpandEnvironmentStringsW(wfilepath.c_str(), nullptr, 0);
+  wchar_t *wstr = new wchar_t[wlen];
+  ExpandEnvironmentStringsW(wfilepath.c_str(), wstr, wlen);
+
+  std::wstring ws(wstr);
+  delete[] wstr;
+  return WcharToUTF8(ws);
+
+#else
+
+#if defined(TARGET_OS_IPHONE) || defined(TARGET_IPHONE_SIMULATOR) ||           \
+    defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__OpenBSD__)
+  // no expansion
+  std::string s = filepath;
+#else
+  std::string s;
+  wordexp_t p;
+
+  if (filepath.empty()) {
+    return "";
+  }
+
+  // Quote the string to keep any spaces in filepath intact.
+  std::string quoted_path = "\"" + filepath + "\"";
+  // char** w;
+  int ret = wordexp(quoted_path.c_str(), &p, 0);
+  if (ret) {
+    // err
+    s = filepath;
+    return s;
+  }
+
+  // Use first element only.
+  if (p.we_wordv) {
+    s = std::string(p.we_wordv[0]);
+    wordfree(&p);
+  } else {
+    s = filepath;
+  }
+
+#endif
+
+  return s;
+#endif
+#endif
+}
+
+bool ReadWholeFile(std::vector<unsigned char>* out, std::string* err,
+                   const std::string& filepath, void*)
+{
+#ifdef TINYGLTF_ANDROID_LOAD_FROM_ASSETS
+    if (asset_manager) {
+        AAsset* asset = AAssetManager_open(asset_manager, filepath.c_str(),
+                                           AASSET_MODE_STREAMING);
+        if (!asset) {
+            if (err) {
+                (*err) += "File open error : " + filepath + "\n";
+            }
+            return false;
+        }
+        size_t size = AAsset_getLength(asset);
+        if (size == 0) {
+            if (err) {
+                (*err) += "Invalid file size : " + filepath +
+                          " (does the path point to a directory?)";
+            }
+            return false;
+        }
+        out->resize(size);
+        AAsset_read(asset, reinterpret_cast<char*>(&out->at(0)), size);
+        AAsset_close(asset);
+        return true;
+    }
+    else {
+        if (err) {
+            (*err) += "No asset manager specified : " + filepath + "\n";
+        }
+        return false;
+    }
+#else
+#ifdef _WIN32
+#if defined(__GLIBCXX__) // mingw
+    int file_descriptor =
+        _wopen(UTF8ToWchar(filepath).c_str(), _O_RDONLY | _O_BINARY);
+    __gnu_cxx::stdio_filebuf<char> wfile_buf(file_descriptor,
+                                             std::ios_base::in);
+    std::istream f(&wfile_buf);
+#elif defined(_MSC_VER) || defined(_LIBCPP_VERSION)
+    // For libcxx, assume _LIBCPP_HAS_OPEN_WITH_WCHAR is defined to accept
+    // `wchar_t *`
+    std::ifstream f(UTF8ToWchar(filepath).c_str(), std::ifstream::binary);
+#else
+    // Unknown compiler/runtime
+    std::ifstream f(filepath.c_str(), std::ifstream::binary);
+#endif
+#else
+    std::ifstream f(filepath.c_str(), std::ifstream::binary);
+#endif
+    if (!f) {
+        if (err) {
+            (*err) += "File open error : " + filepath + "\n";
+        }
+        return false;
+    }
+
+    f.seekg(0, f.end);
+    size_t sz = static_cast<size_t>(f.tellg());
+    f.seekg(0, f.beg);
+
+    if (int64_t(sz) < 0) {
+        if (err) {
+            (*err) += "Invalid file size : " + filepath +
+                      " (does the path point to a directory?)";
+        }
+        return false;
+    }
+    else if (sz == 0) {
+        if (err) {
+            (*err) += "File is empty : " + filepath + "\n";
+        }
+        return false;
+    }
+
+    out->resize(sz);
+    f.read(reinterpret_cast<char*>(&out->at(0)),
+           static_cast<std::streamsize>(sz));
+
+    return true;
+#endif
+}
+
+bool WriteWholeFile(std::string* err, const std::string& filepath,
+                    const std::vector<unsigned char>& contents, void*)
+{
+#ifdef _WIN32
+#if defined(__GLIBCXX__) // mingw
+    int file_descriptor = _wopen(UTF8ToWchar(filepath).c_str(),
+                                 _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY);
+    __gnu_cxx::stdio_filebuf<char> wfile_buf(
+        file_descriptor, std::ios_base::out | std::ios_base::binary);
+    std::ostream f(&wfile_buf);
+#elif defined(_MSC_VER)
+    std::ofstream f(UTF8ToWchar(filepath).c_str(), std::ofstream::binary);
+#else // clang?
+    std::ofstream f(filepath.c_str(), std::ofstream::binary);
+#endif
+#else
+    std::ofstream f(filepath.c_str(), std::ofstream::binary);
+#endif
+    if (!f) {
+        if (err) {
+            (*err) += "File open error for writing : " + filepath + "\n";
+        }
+        return false;
+    }
+
+    f.write(reinterpret_cast<const char*>(&contents.at(0)),
+            static_cast<std::streamsize>(contents.size()));
+    if (!f) {
+        if (err) {
+            (*err) += "File write error: " + filepath + "\n";
+        }
+        return false;
+    }
+
+    return true;
+}
+
+#endif // TINYGLTF_NO_FS
+
+static std::string MimeToExt(const std::string& mimeType)
+{
+    if (mimeType == "image/jpeg") {
+        return "jpg";
+    }
+    else if (mimeType == "image/png") {
+        return "png";
+    }
+    else if (mimeType == "image/bmp") {
+        return "bmp";
+    }
+    else if (mimeType == "image/gif") {
+        return "gif";
+    }
+
+    return "";
+}
+
+static void UpdateImageObject(Image& image, std::string& baseDir, int index,
+                              bool embedImages,
+                              WriteImageDataFunction* WriteImageData = nullptr,
+                              void* user_data = nullptr)
+{
+    std::string filename;
+    std::string ext;
+    // If image has uri, use it as a filename
+    if (image.uri.size()) {
+        filename = GetBaseFilename(image.uri);
+        ext = GetFilePathExtension(filename);
+    }
+    else if (image.bufferView != -1) {
+        // If there's no URI and the data exists in a buffer,
+        // don't change properties or write images
+    }
+    else if (image.name.size()) {
+        ext = MimeToExt(image.mimeType);
+        // Otherwise use name as filename
+        filename = image.name + "." + ext;
+    }
+    else {
+        ext = MimeToExt(image.mimeType);
+        // Fallback to index of image as filename
+        filename = std::to_string(index) + "." + ext;
+    }
+
+    // If callback is set, modify image data object
+    if (*WriteImageData != nullptr && !filename.empty()) {
+        std::string uri;
+        (*WriteImageData)(&baseDir, &filename, &image, embedImages, user_data);
+    }
+}
+
+bool IsDataURI(const std::string& in)
+{
+    std::string header = "data:application/octet-stream;base64,";
+    if (in.find(header) == 0) {
+        return true;
+    }
+
+    header = "data:image/jpeg;base64,";
+    if (in.find(header) == 0) {
+        return true;
+    }
+
+    header = "data:image/png;base64,";
+    if (in.find(header) == 0) {
+        return true;
+    }
+
+    header = "data:image/bmp;base64,";
+    if (in.find(header) == 0) {
+        return true;
+    }
+
+    header = "data:image/gif;base64,";
+    if (in.find(header) == 0) {
+        return true;
+    }
+
+    header = "data:text/plain;base64,";
+    if (in.find(header) == 0) {
+        return true;
+    }
+
+    header = "data:application/gltf-buffer;base64,";
+    if (in.find(header) == 0) {
+        return true;
+    }
+
+    return false;
+}
+
+bool DecodeDataURI(std::vector<unsigned char>* out, std::string& mime_type,
+                   const std::string& in, size_t reqBytes, bool checkSize)
+{
+    std::string header = "data:application/octet-stream;base64,";
+    std::string data;
+    if (in.find(header) == 0) {
+        data = base64_decode(in.substr(header.size())); // cut mime string.
+    }
+
+    if (data.empty()) {
+        header = "data:image/jpeg;base64,";
+        if (in.find(header) == 0) {
+            mime_type = "image/jpeg";
+            data = base64_decode(in.substr(header.size())); // cut mime string.
+        }
+    }
+
+    if (data.empty()) {
+        header = "data:image/png;base64,";
+        if (in.find(header) == 0) {
+            mime_type = "image/png";
+            data = base64_decode(in.substr(header.size())); // cut mime string.
+        }
+    }
+
+    if (data.empty()) {
+        header = "data:image/bmp;base64,";
+        if (in.find(header) == 0) {
+            mime_type = "image/bmp";
+            data = base64_decode(in.substr(header.size())); // cut mime string.
+        }
+    }
+
+    if (data.empty()) {
+        header = "data:image/gif;base64,";
+        if (in.find(header) == 0) {
+            mime_type = "image/gif";
+            data = base64_decode(in.substr(header.size())); // cut mime string.
+        }
+    }
+
+    if (data.empty()) {
+        header = "data:text/plain;base64,";
+        if (in.find(header) == 0) {
+            mime_type = "text/plain";
+            data = base64_decode(in.substr(header.size()));
+        }
+    }
+
+    if (data.empty()) {
+        header = "data:application/gltf-buffer;base64,";
+        if (in.find(header) == 0) {
+            data = base64_decode(in.substr(header.size()));
+        }
+    }
+
+    // TODO(syoyo): Allow empty buffer? #229
+    if (data.empty()) {
+        return false;
+    }
+
+    if (checkSize) {
+        if (data.size() != reqBytes) {
+            return false;
+        }
+        out->resize(reqBytes);
+    }
+    else {
+        out->resize(data.size());
+    }
+    std::copy(data.begin(), data.end(), out->begin());
+    return true;
+}
+
+namespace {
+bool GetInt(const json& o, int& val)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    if (!o.IsDouble()) {
+        if (o.IsInt()) {
+            val = o.GetInt();
+            return true;
+        }
+        else if (o.IsUint()) {
+            val = static_cast<int>(o.GetUint());
+            return true;
+        }
+        else if (o.IsInt64()) {
+            val = static_cast<int>(o.GetInt64());
+            return true;
+        }
+        else if (o.IsUint64()) {
+            val = static_cast<int>(o.GetUint64());
+            return true;
+        }
+    }
+
+    return false;
+#else
+    auto type = o.type();
+
+    if ((type == json::value_t::number_integer) ||
+        (type == json::value_t::number_unsigned)) {
+        val = static_cast<int>(o.get<int64_t>());
+        return true;
+    }
+
+    return false;
+#endif
+}
+
+#ifdef TINYGLTF_USE_RAPIDJSON
+bool GetDouble(const json& o, double& val)
+{
+    if (o.IsDouble()) {
+        val = o.GetDouble();
+        return true;
+    }
+
+    return false;
+}
+#endif
+
+bool GetNumber(const json& o, double& val)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    if (o.IsNumber()) {
+        val = o.GetDouble();
+        return true;
+    }
+
+    return false;
+#else
+    if (o.is_number()) {
+        val = o.get<double>();
+        return true;
+    }
+
+    return false;
+#endif
+}
+
+bool GetString(const json& o, std::string& val)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    if (o.IsString()) {
+        val = o.GetString();
+        return true;
+    }
+
+    return false;
+#else
+    if (o.type() == json::value_t::string) {
+        val = o.get<std::string>();
+        return true;
+    }
+
+    return false;
+#endif
+}
+
+bool IsArray(const json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return o.IsArray();
+#else
+    return o.is_array();
+#endif
+}
+
+json_const_array_iterator ArrayBegin(const json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return o.Begin();
+#else
+    return o.begin();
+#endif
+}
+
+json_const_array_iterator ArrayEnd(const json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return o.End();
+#else
+    return o.end();
+#endif
+}
+
+bool IsObject(const json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return o.IsObject();
+#else
+    return o.is_object();
+#endif
+}
+
+json_const_iterator ObjectBegin(const json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return o.MemberBegin();
+#else
+    return o.begin();
+#endif
+}
+
+json_const_iterator ObjectEnd(const json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return o.MemberEnd();
+#else
+    return o.end();
+#endif
+}
+
+// Making this a const char* results in a pointer to a temporary when
+// TINYGLTF_USE_RAPIDJSON is off.
+std::string GetKey(json_const_iterator& it)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return it->name.GetString();
+#else
+    return it.key().c_str();
+#endif
+}
+
+bool FindMember(const json& o, const char* member, json_const_iterator& it)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    if (!o.IsObject()) {
+        return false;
+    }
+    it = o.FindMember(member);
+    return it != o.MemberEnd();
+#else
+    it = o.find(member);
+    return it != o.end();
+#endif
+}
+
+const json& GetValue(json_const_iterator& it)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return it->value;
+#else
+    return it.value();
+#endif
+}
+
+std::string JsonToString(const json& o, int spacing = -1)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    using namespace rapidjson;
+    StringBuffer buffer;
+    if (spacing == -1) {
+        Writer<StringBuffer> writer(buffer);
+        // TODO: Better error handling.
+        // https://github.com/syoyo/tinygltf/issues/332
+        if (!o.Accept(writer)) {
+            return "tiny_gltf::JsonToString() failed rapidjson conversion";
+        }
+    }
+    else {
+        PrettyWriter<StringBuffer> writer(buffer);
+        writer.SetIndent(' ', uint32_t(spacing));
+        if (!o.Accept(writer)) {
+            return "tiny_gltf::JsonToString() failed rapidjson conversion";
+        }
+    }
+    return buffer.GetString();
+#else
+    return o.dump(spacing);
+#endif
+}
+
+} // namespace
+
+static bool ParseJsonAsValue(Value* ret, const json& o)
+{
+    Value val{};
+#ifdef TINYGLTF_USE_RAPIDJSON
+    using rapidjson::Type;
+    switch (o.GetType()) {
+    case Type::kObjectType: {
+        Value::Object value_object;
+        for (auto it = o.MemberBegin(); it != o.MemberEnd(); ++it) {
+            Value entry;
+            ParseJsonAsValue(&entry, it->value);
+            if (entry.Type() != NULL_TYPE)
+                value_object.emplace(GetKey(it), std::move(entry));
+        }
+        if (value_object.size() > 0)
+            val = Value(std::move(value_object));
+    } break;
+    case Type::kArrayType: {
+        Value::Array value_array;
+        value_array.reserve(o.Size());
+        for (auto it = o.Begin(); it != o.End(); ++it) {
+            Value entry;
+            ParseJsonAsValue(&entry, *it);
+            if (entry.Type() != NULL_TYPE)
+                value_array.emplace_back(std::move(entry));
+        }
+        if (value_array.size() > 0)
+            val = Value(std::move(value_array));
+    } break;
+    case Type::kStringType:
+        val = Value(std::string(o.GetString()));
+        break;
+    case Type::kFalseType:
+    case Type::kTrueType:
+        val = Value(o.GetBool());
+        break;
+    case Type::kNumberType:
+        if (!o.IsDouble()) {
+            int i = 0;
+            GetInt(o, i);
+            val = Value(i);
+        }
+        else {
+            double d = 0.0;
+            GetDouble(o, d);
+            val = Value(d);
+        }
+        break;
+    case Type::kNullType:
+        break;
+        // all types are covered, so no `case default`
+    }
+#else
+    switch (o.type()) {
+    case json::value_t::object: {
+        Value::Object value_object;
+        for (auto it = o.begin(); it != o.end(); it++) {
+            Value entry;
+            ParseJsonAsValue(&entry, it.value());
+            if (entry.Type() != NULL_TYPE)
+                value_object.emplace(it.key(), std::move(entry));
+        }
+        if (value_object.size() > 0)
+            val = Value(std::move(value_object));
+    } break;
+    case json::value_t::array: {
+        Value::Array value_array;
+        value_array.reserve(o.size());
+        for (auto it = o.begin(); it != o.end(); it++) {
+            Value entry;
+            ParseJsonAsValue(&entry, it.value());
+            if (entry.Type() != NULL_TYPE)
+                value_array.emplace_back(std::move(entry));
+        }
+        if (value_array.size() > 0)
+            val = Value(std::move(value_array));
+    } break;
+    case json::value_t::string:
+        val = Value(o.get<std::string>());
+        break;
+    case json::value_t::boolean:
+        val = Value(o.get<bool>());
+        break;
+    case json::value_t::number_integer:
+    case json::value_t::number_unsigned:
+        val = Value(static_cast<int>(o.get<int64_t>()));
+        break;
+    case json::value_t::number_float:
+        val = Value(o.get<double>());
+        break;
+    case json::value_t::null:
+    case json::value_t::discarded:
+    case json::value_t::binary:
+        // default:
+        break;
+    }
+#endif
+    const bool isNotNull = val.Type() != NULL_TYPE;
+
+    if (ret)
+        *ret = std::move(val);
+
+    return isNotNull;
+}
+
+static bool ParseExtrasProperty(Value* ret, const json& o)
+{
+    json_const_iterator it;
+    if (!FindMember(o, "extras", it)) {
+        return false;
+    }
+
+    return ParseJsonAsValue(ret, GetValue(it));
+}
+
+static bool ParseBooleanProperty(bool* ret, std::string* err, const json& o,
+                                 const std::string& property,
+                                 const bool required,
+                                 const std::string& parent_node = "")
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    auto& value = GetValue(it);
+
+    bool isBoolean;
+    bool boolValue = false;
+#ifdef TINYGLTF_USE_RAPIDJSON
+    isBoolean = value.IsBool();
+    if (isBoolean) {
+        boolValue = value.GetBool();
+    }
+#else
+    isBoolean = value.is_boolean();
+    if (isBoolean) {
+        boolValue = value.get<bool>();
+    }
+#endif
+    if (!isBoolean) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is not a bool type.\n";
+            }
+        }
+        return false;
+    }
+
+    if (ret) {
+        (*ret) = boolValue;
+    }
+
+    return true;
+}
+
+static bool ParseIntegerProperty(int* ret, std::string* err, const json& o,
+                                 const std::string& property,
+                                 const bool required,
+                                 const std::string& parent_node = "")
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    int intValue;
+    bool isInt = GetInt(GetValue(it), intValue);
+    if (!isInt) {
+        if (required) {
+            if (err) {
+                (*err) +=
+                    "'" + property + "' property is not an integer type.\n";
+            }
+        }
+        return false;
+    }
+
+    if (ret) {
+        (*ret) = intValue;
+    }
+
+    return true;
+}
+
+static bool ParseUnsignedProperty(size_t* ret, std::string* err, const json& o,
+                                  const std::string& property,
+                                  const bool required,
+                                  const std::string& parent_node = "")
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    auto& value = GetValue(it);
+
+    size_t uValue = 0;
+    bool isUValue;
+#ifdef TINYGLTF_USE_RAPIDJSON
+    isUValue = false;
+    if (value.IsUint()) {
+        uValue = value.GetUint();
+        isUValue = true;
+    }
+    else if (value.IsUint64()) {
+        uValue = value.GetUint64();
+        isUValue = true;
+    }
+#else
+    isUValue = value.is_number_unsigned();
+    if (isUValue) {
+        uValue = value.get<size_t>();
+    }
+#endif
+    if (!isUValue) {
+        if (required) {
+            if (err) {
+                (*err) +=
+                    "'" + property + "' property is not a positive integer.\n";
+            }
+        }
+        return false;
+    }
+
+    if (ret) {
+        (*ret) = uValue;
+    }
+
+    return true;
+}
+
+static bool ParseNumberProperty(double* ret, std::string* err, const json& o,
+                                const std::string& property,
+                                const bool required,
+                                const std::string& parent_node = "")
+{
+    json_const_iterator it;
+
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    double numberValue;
+    bool isNumber = GetNumber(GetValue(it), numberValue);
+
+    if (!isNumber) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is not a number type.\n";
+            }
+        }
+        return false;
+    }
+
+    if (ret) {
+        (*ret) = numberValue;
+    }
+
+    return true;
+}
+
+static bool ParseNumberArrayProperty(std::vector<double>* ret, std::string* err,
+                                     const json& o, const std::string& property,
+                                     bool required,
+                                     const std::string& parent_node = "")
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    if (!IsArray(GetValue(it))) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is not an array";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    ret->clear();
+    auto end = ArrayEnd(GetValue(it));
+    for (auto i = ArrayBegin(GetValue(it)); i != end; ++i) {
+        double numberValue;
+        const bool isNumber = GetNumber(*i, numberValue);
+        if (!isNumber) {
+            if (required) {
+                if (err) {
+                    (*err) += "'" + property + "' property is not a number.\n";
+                    if (!parent_node.empty()) {
+                        (*err) += " in " + parent_node;
+                    }
+                    (*err) += ".\n";
+                }
+            }
+            return false;
+        }
+        ret->push_back(numberValue);
+    }
+
+    return true;
+}
+
+static bool ParseIntegerArrayProperty(std::vector<int>* ret, std::string* err,
+                                      const json& o,
+                                      const std::string& property,
+                                      bool required,
+                                      const std::string& parent_node = "")
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    if (!IsArray(GetValue(it))) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is not an array";
+                if (!parent_node.empty()) {
+                    (*err) += " in " + parent_node;
+                }
+                (*err) += ".\n";
+            }
+        }
+        return false;
+    }
+
+    ret->clear();
+    auto end = ArrayEnd(GetValue(it));
+    for (auto i = ArrayBegin(GetValue(it)); i != end; ++i) {
+        int numberValue;
+        bool isNumber = GetInt(*i, numberValue);
+        if (!isNumber) {
+            if (required) {
+                if (err) {
+                    (*err) +=
+                        "'" + property + "' property is not an integer type.\n";
+                    if (!parent_node.empty()) {
+                        (*err) += " in " + parent_node;
+                    }
+                    (*err) += ".\n";
+                }
+            }
+            return false;
+        }
+        ret->push_back(numberValue);
+    }
+
+    return true;
+}
+
+static bool ParseStringProperty(std::string* ret, std::string* err,
+                                const json& o, const std::string& property,
+                                bool required,
+                                const std::string& parent_node = std::string())
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing";
+                if (parent_node.empty()) {
+                    (*err) += ".\n";
+                }
+                else {
+                    (*err) += " in `" + parent_node + "'.\n";
+                }
+            }
+        }
+        return false;
+    }
+
+    std::string strValue;
+    if (!GetString(GetValue(it), strValue)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is not a string type.\n";
+            }
+        }
+        return false;
+    }
+
+    if (ret) {
+        (*ret) = std::move(strValue);
+    }
+
+    return true;
+}
+
+static bool ParseStringIntegerProperty(std::map<std::string, int>* ret,
+                                       std::string* err, const json& o,
+                                       const std::string& property,
+                                       bool required,
+                                       const std::string& parent = "")
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                if (!parent.empty()) {
+                    (*err) += "'" + property + "' property is missing in " +
+                              parent + ".\n";
+                }
+                else {
+                    (*err) += "'" + property + "' property is missing.\n";
+                }
+            }
+        }
+        return false;
+    }
+
+    const json& dict = GetValue(it);
+
+    // Make sure we are dealing with an object / dictionary.
+    if (!IsObject(dict)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is not an object.\n";
+            }
+        }
+        return false;
+    }
+
+    ret->clear();
+
+    json_const_iterator dictIt(ObjectBegin(dict));
+    json_const_iterator dictItEnd(ObjectEnd(dict));
+
+    for (; dictIt != dictItEnd; ++dictIt) {
+        int intVal;
+        if (!GetInt(GetValue(dictIt), intVal)) {
+            if (required) {
+                if (err) {
+                    (*err) +=
+                        "'" + property + "' value is not an integer type.\n";
+                }
+            }
+            return false;
+        }
+
+        // Insert into the list.
+        (*ret)[GetKey(dictIt)] = intVal;
+    }
+    return true;
+}
+
+static bool ParseJSONProperty(std::map<std::string, double>* ret,
+                              std::string* err, const json& o,
+                              const std::string& property, bool required)
+{
+    json_const_iterator it;
+    if (!FindMember(o, property.c_str(), it)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is missing. \n'";
+            }
+        }
+        return false;
+    }
+
+    const json& obj = GetValue(it);
+
+    if (!IsObject(obj)) {
+        if (required) {
+            if (err) {
+                (*err) += "'" + property + "' property is not a JSON object.\n";
+            }
+        }
+        return false;
+    }
+
+    ret->clear();
+
+    json_const_iterator it2(ObjectBegin(obj));
+    json_const_iterator itEnd(ObjectEnd(obj));
+    for (; it2 != itEnd; ++it2) {
+        double numVal;
+        if (GetNumber(GetValue(it2), numVal))
+            ret->emplace(std::string(GetKey(it2)), numVal);
+    }
+
+    return true;
+}
+
+static bool ParseParameterProperty(Parameter* param, std::string* err,
+                                   const json& o, const std::string& prop,
+                                   bool required)
+{
+    // A parameter value can either be a string or an array of either a boolean
+    // or a number. Booleans of any kind aren't supported here. Granted, it
+    // complicates the Parameter structure and breaks it semantically in the
+    // sense that the client probably works off the assumption that if the
+    // string is empty the vector is used, etc. Would a tagged union work?
+    if (ParseStringProperty(&param->string_value, err, o, prop, false)) {
+        // Found string property.
+        return true;
+    }
+    else if (ParseNumberArrayProperty(&param->number_array, err, o, prop,
+                                      false)) {
+        // Found a number array.
+        return true;
+    }
+    else if (ParseNumberProperty(&param->number_value, err, o, prop, false)) {
+        param->has_number_value = true;
+        return true;
+    }
+    else if (ParseJSONProperty(&param->json_double_value, err, o, prop,
+                               false)) {
+        return true;
+    }
+    else if (ParseBooleanProperty(&param->bool_value, err, o, prop, false)) {
+        return true;
+    }
+    else {
+        if (required) {
+            if (err) {
+                (*err) +=
+                    "parameter must be a string or number / number array.\n";
+            }
+        }
+        return false;
+    }
+}
+
+static bool ParseExtensionsProperty(ExtensionMap* ret, std::string* err,
+                                    const json& o)
+{
+    (void)err;
+
+    json_const_iterator it;
+    if (!FindMember(o, "extensions", it)) {
+        return false;
+    }
+
+    auto& obj = GetValue(it);
+    if (!IsObject(obj)) {
+        return false;
+    }
+    ExtensionMap extensions;
+    json_const_iterator extIt = ObjectBegin(obj); // it.value().begin();
+    json_const_iterator extEnd = ObjectEnd(obj);
+    for (; extIt != extEnd; ++extIt) {
+        auto& itObj = GetValue(extIt);
+        if (!IsObject(itObj))
+            continue;
+        std::string key(GetKey(extIt));
+        if (!ParseJsonAsValue(&extensions[key], itObj)) {
+            if (!key.empty()) {
+                // create empty object so that an extension object is still of
+                // type object
+                extensions[key] = Value{Value::Object{}};
+            }
+        }
+    }
+    if (ret) {
+        (*ret) = std::move(extensions);
+    }
+    return true;
+}
+
+static bool ParseAsset(Asset* asset, std::string* err, const json& o,
+                       bool store_original_json_for_extras_and_extensions)
+{
+    ParseStringProperty(&asset->version, err, o, "version", true, "Asset");
+    ParseStringProperty(&asset->generator, err, o, "generator", false, "Asset");
+    ParseStringProperty(&asset->minVersion, err, o, "minVersion", false,
+                        "Asset");
+    ParseStringProperty(&asset->copyright, err, o, "copyright", false, "Asset");
+
+    ParseExtensionsProperty(&asset->extensions, err, o);
+
+    // Unity exporter version is added as extra here
+    ParseExtrasProperty(&(asset->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                asset->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                asset->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseImage(Image* image, const int image_idx, std::string* err,
+                       std::string* warn, const json& o,
+                       bool store_original_json_for_extras_and_extensions,
+                       const std::string& basedir, FsCallbacks* fs,
+                       LoadImageDataFunction* LoadImageData = nullptr,
+                       void* load_image_user_data = nullptr)
+{
+    // A glTF image must either reference a bufferView or an image uri
+
+    // schema says oneOf [`bufferView`, `uri`]
+    // TODO(syoyo): Check the type of each parameters.
+    json_const_iterator it;
+    bool hasBufferView = FindMember(o, "bufferView", it);
+    bool hasURI = FindMember(o, "uri", it);
+
+    ParseStringProperty(&image->name, err, o, "name", false);
+
+    if (hasBufferView && hasURI) {
+        // Should not both defined.
+        if (err) {
+            (*err) += "Only one of `bufferView` or `uri` should be defined, "
+                      "but both are "
+                      "defined for image[" +
+                      std::to_string(image_idx) + "] name = \"" + image->name +
+                      "\"\n";
+        }
+        return false;
+    }
+
+    if (!hasBufferView && !hasURI) {
+        if (err) {
+            (*err) +=
+                "Neither required `bufferView` nor `uri` defined for image[" +
+                std::to_string(image_idx) + "] name = \"" + image->name +
+                "\"\n";
+        }
+        return false;
+    }
+
+    ParseExtensionsProperty(&image->extensions, err, o);
+    ParseExtrasProperty(&image->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator eit;
+            if (FindMember(o, "extensions", eit)) {
+                image->extensions_json_string = JsonToString(GetValue(eit));
+            }
+        }
+        {
+            json_const_iterator eit;
+            if (FindMember(o, "extras", eit)) {
+                image->extras_json_string = JsonToString(GetValue(eit));
+            }
+        }
+    }
+
+    if (hasBufferView) {
+        int bufferView = -1;
+        if (!ParseIntegerProperty(&bufferView, err, o, "bufferView", true)) {
+            if (err) {
+                (*err) += "Failed to parse `bufferView` for image[" +
+                          std::to_string(image_idx) + "] name = \"" +
+                          image->name + "\"\n";
+            }
+            return false;
+        }
+
+        std::string mime_type;
+        ParseStringProperty(&mime_type, err, o, "mimeType", false);
+
+        int width = 0;
+        ParseIntegerProperty(&width, err, o, "width", false);
+
+        int height = 0;
+        ParseIntegerProperty(&height, err, o, "height", false);
+
+        // Just only save some information here. Loading actual image data from
+        // bufferView is done after this `ParseImage` function.
+        image->bufferView = bufferView;
+        image->mimeType = mime_type;
+        image->width = width;
+        image->height = height;
+
+        return true;
+    }
+
+    // Parse URI & Load image data.
+
+    std::string uri;
+    std::string tmp_err;
+    if (!ParseStringProperty(&uri, &tmp_err, o, "uri", true)) {
+        if (err) {
+            (*err) += "Failed to parse `uri` for image[" +
+                      std::to_string(image_idx) + "] name = \"" + image->name +
+                      "\".\n";
+        }
+        return false;
+    }
+
+    std::vector<unsigned char> img;
+
+    if (IsDataURI(uri)) {
+        if (!DecodeDataURI(&img, image->mimeType, uri, 0, false)) {
+            if (err) {
+                (*err) += "Failed to decode 'uri' for image[" +
+                          std::to_string(image_idx) + "] name = [" +
+                          image->name + "]\n";
+            }
+            return false;
+        }
+    }
+    else {
+        // Assume external file
+        // Keep texture path (for textures that cannot be decoded)
+        image->uri = uri;
+#ifdef TINYGLTF_NO_EXTERNAL_IMAGE
+        return true;
+#else
+        std::string decoded_uri = dlib::urldecode(uri);
+        if (!LoadExternalFile(&img, err, warn, decoded_uri, basedir,
+                              /* required */ false, /* required bytes */ 0,
+                              /* checksize */ false, fs)) {
+            if (warn) {
+                (*warn) += "Failed to load external 'uri' for image[" +
+                           std::to_string(image_idx) + "] name = [" +
+                           image->name + "]\n";
+            }
+            // If the image cannot be loaded, keep uri as image->uri.
+            return true;
+        }
+
+        if (img.empty()) {
+            if (warn) {
+                (*warn) += "Image data is empty for image[" +
+                           std::to_string(image_idx) + "] name = [" +
+                           image->name + "] \n";
+            }
+            return false;
+        }
+#endif
+    }
+
+    if (*LoadImageData == nullptr) {
+        if (err) {
+            (*err) += "No LoadImageData callback specified.\n";
+        }
+        return false;
+    }
+    return (*LoadImageData)(image, image_idx, err, warn, 0, 0, &img.at(0),
+                            static_cast<int>(img.size()), load_image_user_data);
+}
+
+static bool ParseTexture(Texture* texture, std::string* err, const json& o,
+                         bool store_original_json_for_extras_and_extensions,
+                         const std::string& basedir)
+{
+    (void)basedir;
+    int sampler = -1;
+    int source = -1;
+    ParseIntegerProperty(&sampler, err, o, "sampler", false);
+
+    ParseIntegerProperty(&source, err, o, "source", false);
+
+    texture->sampler = sampler;
+    texture->source = source;
+
+    ParseExtensionsProperty(&texture->extensions, err, o);
+    ParseExtrasProperty(&texture->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                texture->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                texture->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    ParseStringProperty(&texture->name, err, o, "name", false);
+
+    return true;
+}
+
+static bool ParseTextureInfo(TextureInfo* texinfo, std::string* err,
+                             const json& o,
+                             bool store_original_json_for_extras_and_extensions)
+{
+    if (texinfo == nullptr) {
+        return false;
+    }
+
+    if (!ParseIntegerProperty(&texinfo->index, err, o, "index",
+                              /* required */ true, "TextureInfo")) {
+        return false;
+    }
+
+    ParseIntegerProperty(&texinfo->texCoord, err, o, "texCoord", false);
+
+    ParseExtensionsProperty(&texinfo->extensions, err, o);
+    ParseExtrasProperty(&texinfo->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                texinfo->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                texinfo->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool
+ParseNormalTextureInfo(NormalTextureInfo* texinfo, std::string* err,
+                       const json& o,
+                       bool store_original_json_for_extras_and_extensions)
+{
+    if (texinfo == nullptr) {
+        return false;
+    }
+
+    if (!ParseIntegerProperty(&texinfo->index, err, o, "index",
+                              /* required */ true, "NormalTextureInfo")) {
+        return false;
+    }
+
+    ParseIntegerProperty(&texinfo->texCoord, err, o, "texCoord", false);
+    ParseNumberProperty(&texinfo->scale, err, o, "scale", false);
+
+    ParseExtensionsProperty(&texinfo->extensions, err, o);
+    ParseExtrasProperty(&texinfo->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                texinfo->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                texinfo->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool
+ParseOcclusionTextureInfo(OcclusionTextureInfo* texinfo, std::string* err,
+                          const json& o,
+                          bool store_original_json_for_extras_and_extensions)
+{
+    if (texinfo == nullptr) {
+        return false;
+    }
+
+    if (!ParseIntegerProperty(&texinfo->index, err, o, "index",
+                              /* required */ true, "NormalTextureInfo")) {
+        return false;
+    }
+
+    ParseIntegerProperty(&texinfo->texCoord, err, o, "texCoord", false);
+    ParseNumberProperty(&texinfo->strength, err, o, "strength", false);
+
+    ParseExtensionsProperty(&texinfo->extensions, err, o);
+    ParseExtrasProperty(&texinfo->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                texinfo->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                texinfo->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseBuffer(Buffer* buffer, std::string* err, const json& o,
+                        bool store_original_json_for_extras_and_extensions,
+                        FsCallbacks* fs, const std::string& basedir,
+                        bool is_binary = false,
+                        const unsigned char* bin_data = nullptr,
+                        size_t bin_size = 0)
+{
+    size_t byteLength;
+    if (!ParseUnsignedProperty(&byteLength, err, o, "byteLength", true,
+                               "Buffer")) {
+        return false;
+    }
+
+    // In glTF 2.0, uri is not mandatory anymore
+    buffer->uri.clear();
+    ParseStringProperty(&buffer->uri, err, o, "uri", false, "Buffer");
+
+    // having an empty uri for a non embedded image should not be valid
+    if (!is_binary && buffer->uri.empty()) {
+        if (err) {
+            (*err) += "'uri' is missing from non binary glTF file buffer.\n";
+        }
+    }
+
+    json_const_iterator type;
+    if (FindMember(o, "type", type)) {
+        std::string typeStr;
+        if (GetString(GetValue(type), typeStr)) {
+            if (typeStr.compare("arraybuffer") == 0) {
+                // buffer.type = "arraybuffer";
+            }
+        }
+    }
+
+    if (is_binary) {
+        // Still binary glTF accepts external dataURI.
+        if (!buffer->uri.empty()) {
+            // First try embedded data URI.
+            if (IsDataURI(buffer->uri)) {
+                std::string mime_type;
+                if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri,
+                                   byteLength, true)) {
+                    if (err) {
+                        (*err) += "Failed to decode 'uri' : " + buffer->uri +
+                                  " in Buffer\n";
+                    }
+                    return false;
+                }
+            }
+            else {
+                // External .bin file.
+                std::string decoded_uri = dlib::urldecode(buffer->uri);
+                if (!LoadExternalFile(&buffer->data, err, /* warn */ nullptr,
+                                      decoded_uri, basedir, /* required */ true,
+                                      byteLength, /* checkSize */ true, fs)) {
+                    return false;
+                }
+            }
+        }
+        else {
+            // load data from (embedded) binary data
+
+            if ((bin_size == 0) || (bin_data == nullptr)) {
+                if (err) {
+                    (*err) += "Invalid binary data in `Buffer', or GLB with "
+                              "empty BIN chunk.\n";
+                }
+                return false;
+            }
+
+            if (byteLength > bin_size) {
+                if (err) {
+                    std::stringstream ss;
+                    ss << "Invalid `byteLength'. Must be equal or less than "
+                          "binary size: "
+                          "`byteLength' = "
+                       << byteLength << ", binary size = " << bin_size
+                       << std::endl;
+                    (*err) += ss.str();
+                }
+                return false;
+            }
+
+            // Read buffer data
+            buffer->data.resize(static_cast<size_t>(byteLength));
+            memcpy(&(buffer->data.at(0)), bin_data,
+                   static_cast<size_t>(byteLength));
+        }
+    }
+    else {
+        if (IsDataURI(buffer->uri)) {
+            std::string mime_type;
+            if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri,
+                               byteLength, true)) {
+                if (err) {
+                    (*err) += "Failed to decode 'uri' : " + buffer->uri +
+                              " in Buffer\n";
+                }
+                return false;
+            }
+        }
+        else {
+            // Assume external .bin file.
+            std::string decoded_uri = dlib::urldecode(buffer->uri);
+            if (!LoadExternalFile(&buffer->data, err, /* warn */ nullptr,
+                                  decoded_uri, basedir, /* required */ true,
+                                  byteLength,
+                                  /* checkSize */ true, fs)) {
+                return false;
+            }
+        }
+    }
+
+    ParseStringProperty(&buffer->name, err, o, "name", false);
+
+    ParseExtensionsProperty(&buffer->extensions, err, o);
+    ParseExtrasProperty(&buffer->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                buffer->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                buffer->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseBufferView(BufferView* bufferView, std::string* err,
+                            const json& o,
+                            bool store_original_json_for_extras_and_extensions)
+{
+    int buffer = -1;
+    if (!ParseIntegerProperty(&buffer, err, o, "buffer", true, "BufferView")) {
+        return false;
+    }
+
+    size_t byteOffset = 0;
+    ParseUnsignedProperty(&byteOffset, err, o, "byteOffset", false);
+
+    size_t byteLength = 1;
+    if (!ParseUnsignedProperty(&byteLength, err, o, "byteLength", true,
+                               "BufferView")) {
+        return false;
+    }
+
+    size_t byteStride = 0;
+    if (!ParseUnsignedProperty(&byteStride, err, o, "byteStride", false)) {
+        // Spec says: When byteStride of referenced bufferView is not defined,
+        // it means that accessor elements are tightly packed, i.e., effective
+        // stride equals the size of the element. We cannot determine the actual
+        // byteStride until Accessor are parsed, thus set 0(= tightly packed)
+        // here(as done in OpenGL's VertexAttribPoiner)
+        byteStride = 0;
+    }
+
+    if ((byteStride > 252) || ((byteStride % 4) != 0)) {
+        if (err) {
+            std::stringstream ss;
+            ss << "Invalid `byteStride' value. `byteStride' must be the "
+                  "multiple of "
+                  "4 : "
+               << byteStride << std::endl;
+
+            (*err) += ss.str();
+        }
+        return false;
+    }
+
+    int target = 0;
+    ParseIntegerProperty(&target, err, o, "target", false);
+    if ((target == TINYGLTF_TARGET_ARRAY_BUFFER) ||
+        (target == TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER)) {
+        // OK
+    }
+    else {
+        target = 0;
+    }
+    bufferView->target = target;
+
+    ParseStringProperty(&bufferView->name, err, o, "name", false);
+
+    ParseExtensionsProperty(&bufferView->extensions, err, o);
+    ParseExtrasProperty(&bufferView->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                bufferView->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                bufferView->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    bufferView->buffer = buffer;
+    bufferView->byteOffset = byteOffset;
+    bufferView->byteLength = byteLength;
+    bufferView->byteStride = byteStride;
+    return true;
+}
+
+static bool ParseSparseAccessor(Accessor* accessor, std::string* err,
+                                const json& o)
+{
+    accessor->sparse.isSparse = true;
+
+    int count = 0;
+    if (!ParseIntegerProperty(&count, err, o, "count", true,
+                              "SparseAccessor")) {
+        return false;
+    }
+
+    json_const_iterator indices_iterator;
+    json_const_iterator values_iterator;
+    if (!FindMember(o, "indices", indices_iterator)) {
+        (*err) = "the sparse object of this accessor doesn't have indices";
+        return false;
+    }
+
+    if (!FindMember(o, "values", values_iterator)) {
+        (*err) = "the sparse object of this accessor doesn't have values";
+        return false;
+    }
+
+    const json& indices_obj = GetValue(indices_iterator);
+    const json& values_obj = GetValue(values_iterator);
+
+    int indices_buffer_view = 0, indices_byte_offset = 0, component_type = 0;
+    if (!ParseIntegerProperty(&indices_buffer_view, err, indices_obj,
+                              "bufferView", true, "SparseAccessor")) {
+        return false;
+    }
+    ParseIntegerProperty(&indices_byte_offset, err, indices_obj, "byteOffset",
+                         false);
+    if (!ParseIntegerProperty(&component_type, err, indices_obj,
+                              "componentType", true, "SparseAccessor")) {
+        return false;
+    }
+
+    int values_buffer_view = 0, values_byte_offset = 0;
+    if (!ParseIntegerProperty(&values_buffer_view, err, values_obj,
+                              "bufferView", true, "SparseAccessor")) {
+        return false;
+    }
+    ParseIntegerProperty(&values_byte_offset, err, values_obj, "byteOffset",
+                         false);
+
+    accessor->sparse.count = count;
+    accessor->sparse.indices.bufferView = indices_buffer_view;
+    accessor->sparse.indices.byteOffset = indices_byte_offset;
+    accessor->sparse.indices.componentType = component_type;
+    accessor->sparse.values.bufferView = values_buffer_view;
+    accessor->sparse.values.byteOffset = values_byte_offset;
+
+    return true;
+}
+
+static bool ParseAccessor(Accessor* accessor, std::string* err, const json& o,
+                          bool store_original_json_for_extras_and_extensions)
+{
+    int bufferView = -1;
+    ParseIntegerProperty(&bufferView, err, o, "bufferView", false, "Accessor");
+
+    size_t byteOffset = 0;
+    ParseUnsignedProperty(&byteOffset, err, o, "byteOffset", false, "Accessor");
+
+    bool normalized = false;
+    ParseBooleanProperty(&normalized, err, o, "normalized", false, "Accessor");
+
+    size_t componentType = 0;
+    if (!ParseUnsignedProperty(&componentType, err, o, "componentType", true,
+                               "Accessor")) {
+        return false;
+    }
+
+    size_t count = 0;
+    if (!ParseUnsignedProperty(&count, err, o, "count", true, "Accessor")) {
+        return false;
+    }
+
+    std::string type;
+    if (!ParseStringProperty(&type, err, o, "type", true, "Accessor")) {
+        return false;
+    }
+
+    if (type.compare("SCALAR") == 0) {
+        accessor->type = TINYGLTF_TYPE_SCALAR;
+    }
+    else if (type.compare("VEC2") == 0) {
+        accessor->type = TINYGLTF_TYPE_VEC2;
+    }
+    else if (type.compare("VEC3") == 0) {
+        accessor->type = TINYGLTF_TYPE_VEC3;
+    }
+    else if (type.compare("VEC4") == 0) {
+        accessor->type = TINYGLTF_TYPE_VEC4;
+    }
+    else if (type.compare("MAT2") == 0) {
+        accessor->type = TINYGLTF_TYPE_MAT2;
+    }
+    else if (type.compare("MAT3") == 0) {
+        accessor->type = TINYGLTF_TYPE_MAT3;
+    }
+    else if (type.compare("MAT4") == 0) {
+        accessor->type = TINYGLTF_TYPE_MAT4;
+    }
+    else {
+        std::stringstream ss;
+        ss << "Unsupported `type` for accessor object. Got \"" << type
+           << "\"\n";
+        if (err) {
+            (*err) += ss.str();
+        }
+        return false;
+    }
+
+    ParseStringProperty(&accessor->name, err, o, "name", false);
+
+    accessor->minValues.clear();
+    accessor->maxValues.clear();
+    ParseNumberArrayProperty(&accessor->minValues, err, o, "min", false,
+                             "Accessor");
+
+    ParseNumberArrayProperty(&accessor->maxValues, err, o, "max", false,
+                             "Accessor");
+
+    accessor->count = count;
+    accessor->bufferView = bufferView;
+    accessor->byteOffset = byteOffset;
+    accessor->normalized = normalized;
+    {
+        if (componentType >= TINYGLTF_COMPONENT_TYPE_BYTE &&
+            componentType <= TINYGLTF_COMPONENT_TYPE_DOUBLE) {
+            // OK
+            accessor->componentType = int(componentType);
+        }
+        else {
+            std::stringstream ss;
+            ss << "Invalid `componentType` in accessor. Got " << componentType
+               << "\n";
+            if (err) {
+                (*err) += ss.str();
+            }
+            return false;
+        }
+    }
+
+    ParseExtensionsProperty(&(accessor->extensions), err, o);
+    ParseExtrasProperty(&(accessor->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                accessor->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                accessor->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    // check if accessor has a "sparse" object:
+    json_const_iterator iterator;
+    if (FindMember(o, "sparse", iterator)) {
+        // here this accessor has a "sparse" subobject
+        return ParseSparseAccessor(accessor, err, GetValue(iterator));
+    }
+
+    return true;
+}
+
+#ifdef TINYGLTF_ENABLE_DRACO
+
+static void DecodeIndexBuffer(draco::Mesh* mesh, size_t componentSize,
+                              std::vector<uint8_t>& outBuffer)
+{
+    if (componentSize == 4) {
+        assert(sizeof(mesh->face(draco::FaceIndex(0))[0]) == componentSize);
+        memcpy(outBuffer.data(), &mesh->face(draco::FaceIndex(0))[0],
+               outBuffer.size());
+    }
+    else {
+        size_t faceStride = componentSize * 3;
+        for (draco::FaceIndex f(0); f < mesh->num_faces(); ++f) {
+            const draco::Mesh::Face& face = mesh->face(f);
+            if (componentSize == 2) {
+                uint16_t indices[3] = {(uint16_t)face[0].value(),
+                                       (uint16_t)face[1].value(),
+                                       (uint16_t)face[2].value()};
+                memcpy(outBuffer.data() + f.value() * faceStride, &indices[0],
+                       faceStride);
+            }
+            else {
+                uint8_t indices[3] = {(uint8_t)face[0].value(),
+                                      (uint8_t)face[1].value(),
+                                      (uint8_t)face[2].value()};
+                memcpy(outBuffer.data() + f.value() * faceStride, &indices[0],
+                       faceStride);
+            }
+        }
+    }
+}
+
+template <typename T>
+static bool GetAttributeForAllPoints(draco::Mesh* mesh,
+                                     const draco::PointAttribute* pAttribute,
+                                     std::vector<uint8_t>& outBuffer)
+{
+    size_t byteOffset = 0;
+    T values[4] = {0, 0, 0, 0};
+    for (draco::PointIndex i(0); i < mesh->num_points(); ++i) {
+        const draco::AttributeValueIndex val_index =
+            pAttribute->mapped_index(i);
+        if (!pAttribute->ConvertValue<T>(val_index,
+                                         pAttribute->num_components(), values))
+            return false;
+
+        memcpy(outBuffer.data() + byteOffset, &values[0],
+               sizeof(T) * pAttribute->num_components());
+        byteOffset += sizeof(T) * pAttribute->num_components();
+    }
+
+    return true;
+}
+
+static bool GetAttributeForAllPoints(uint32_t componentType, draco::Mesh* mesh,
+                                     const draco::PointAttribute* pAttribute,
+                                     std::vector<uint8_t>& outBuffer)
+{
+    bool decodeResult = false;
+    switch (componentType) {
+    case TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE:
+        decodeResult =
+            GetAttributeForAllPoints<uint8_t>(mesh, pAttribute, outBuffer);
+        break;
+    case TINYGLTF_COMPONENT_TYPE_BYTE:
+        decodeResult =
+            GetAttributeForAllPoints<int8_t>(mesh, pAttribute, outBuffer);
+        break;
+    case TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT:
+        decodeResult =
+            GetAttributeForAllPoints<uint16_t>(mesh, pAttribute, outBuffer);
+        break;
+    case TINYGLTF_COMPONENT_TYPE_SHORT:
+        decodeResult =
+            GetAttributeForAllPoints<int16_t>(mesh, pAttribute, outBuffer);
+        break;
+    case TINYGLTF_COMPONENT_TYPE_INT:
+        decodeResult =
+            GetAttributeForAllPoints<int32_t>(mesh, pAttribute, outBuffer);
+        break;
+    case TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT:
+        decodeResult =
+            GetAttributeForAllPoints<uint32_t>(mesh, pAttribute, outBuffer);
+        break;
+    case TINYGLTF_COMPONENT_TYPE_FLOAT:
+        decodeResult =
+            GetAttributeForAllPoints<float>(mesh, pAttribute, outBuffer);
+        break;
+    case TINYGLTF_COMPONENT_TYPE_DOUBLE:
+        decodeResult =
+            GetAttributeForAllPoints<double>(mesh, pAttribute, outBuffer);
+        break;
+    default:
+        return false;
+    }
+
+    return decodeResult;
+}
+
+static bool ParseDracoExtension(Primitive* primitive, Model* model,
+                                std::string* err,
+                                const Value& dracoExtensionValue)
+{
+    (void)err;
+    auto bufferViewValue = dracoExtensionValue.Get("bufferView");
+    if (!bufferViewValue.IsInt())
+        return false;
+    auto attributesValue = dracoExtensionValue.Get("attributes");
+    if (!attributesValue.IsObject())
+        return false;
+
+    auto attributesObject = attributesValue.Get<Value::Object>();
+    int bufferView = bufferViewValue.Get<int>();
+
+    BufferView& view = model->bufferViews[bufferView];
+    Buffer& buffer = model->buffers[view.buffer];
+    // BufferView has already been decoded
+    if (view.dracoDecoded)
+        return true;
+    view.dracoDecoded = true;
+
+    const char* bufferViewData =
+        reinterpret_cast<const char*>(buffer.data.data() + view.byteOffset);
+    size_t bufferViewSize = view.byteLength;
+
+    // decode draco
+    draco::DecoderBuffer decoderBuffer;
+    decoderBuffer.Init(bufferViewData, bufferViewSize);
+    draco::Decoder decoder;
+    auto decodeResult = decoder.DecodeMeshFromBuffer(&decoderBuffer);
+    if (!decodeResult.ok()) {
+        return false;
+    }
+    const std::unique_ptr<draco::Mesh>& mesh = decodeResult.value();
+
+    // create new bufferView for indices
+    if (primitive->indices >= 0) {
+        int32_t componentSize = GetComponentSizeInBytes(
+            model->accessors[primitive->indices].componentType);
+        Buffer decodedIndexBuffer;
+        decodedIndexBuffer.data.resize(mesh->num_faces() * 3 * componentSize);
+
+        DecodeIndexBuffer(mesh.get(), componentSize, decodedIndexBuffer.data);
+
+        model->buffers.emplace_back(std::move(decodedIndexBuffer));
+
+        BufferView decodedIndexBufferView;
+        decodedIndexBufferView.buffer = int(model->buffers.size() - 1);
+        decodedIndexBufferView.byteLength =
+            int(mesh->num_faces() * 3 * componentSize);
+        decodedIndexBufferView.byteOffset = 0;
+        decodedIndexBufferView.byteStride = 0;
+        decodedIndexBufferView.target = TINYGLTF_TARGET_ARRAY_BUFFER;
+        model->bufferViews.emplace_back(std::move(decodedIndexBufferView));
+
+        model->accessors[primitive->indices].bufferView =
+            int(model->bufferViews.size() - 1);
+        model->accessors[primitive->indices].count = int(mesh->num_faces() * 3);
+    }
+
+    for (const auto& attribute : attributesObject) {
+        if (!attribute.second.IsInt())
+            return false;
+        auto primitiveAttribute = primitive->attributes.find(attribute.first);
+        if (primitiveAttribute == primitive->attributes.end())
+            return false;
+
+        int dracoAttributeIndex = attribute.second.Get<int>();
+        const auto pAttribute =
+            mesh->GetAttributeByUniqueId(dracoAttributeIndex);
+        const auto componentType =
+            model->accessors[primitiveAttribute->second].componentType;
+
+        // Create a new buffer for this decoded buffer
+        Buffer decodedBuffer;
+        size_t bufferSize = mesh->num_points() * pAttribute->num_components() *
+                            GetComponentSizeInBytes(componentType);
+        decodedBuffer.data.resize(bufferSize);
+
+        if (!GetAttributeForAllPoints(componentType, mesh.get(), pAttribute,
+                                      decodedBuffer.data))
+            return false;
+
+        model->buffers.emplace_back(std::move(decodedBuffer));
+
+        BufferView decodedBufferView;
+        decodedBufferView.buffer = int(model->buffers.size() - 1);
+        decodedBufferView.byteLength = bufferSize;
+        decodedBufferView.byteOffset = pAttribute->byte_offset();
+        decodedBufferView.byteStride = pAttribute->byte_stride();
+        decodedBufferView.target = primitive->indices >= 0
+                                       ? TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER
+                                       : TINYGLTF_TARGET_ARRAY_BUFFER;
+        model->bufferViews.emplace_back(std::move(decodedBufferView));
+
+        model->accessors[primitiveAttribute->second].bufferView =
+            int(model->bufferViews.size() - 1);
+        model->accessors[primitiveAttribute->second].count =
+            int(mesh->num_points());
+    }
+
+    return true;
+}
+#endif
+
+static bool ParsePrimitive(Primitive* primitive, Model* model, std::string* err,
+                           const json& o,
+                           bool store_original_json_for_extras_and_extensions)
+{
+    int material = -1;
+    ParseIntegerProperty(&material, err, o, "material", false);
+    primitive->material = material;
+
+    int mode = TINYGLTF_MODE_TRIANGLES;
+    ParseIntegerProperty(&mode, err, o, "mode", false);
+    primitive->mode = mode; // Why only triangles were supported ?
+
+    int indices = -1;
+    ParseIntegerProperty(&indices, err, o, "indices", false);
+    primitive->indices = indices;
+    if (!ParseStringIntegerProperty(&primitive->attributes, err, o,
+                                    "attributes", true, "Primitive")) {
+        return false;
+    }
+
+    // Look for morph targets
+    json_const_iterator targetsObject;
+    if (FindMember(o, "targets", targetsObject) &&
+        IsArray(GetValue(targetsObject))) {
+        auto targetsObjectEnd = ArrayEnd(GetValue(targetsObject));
+        for (json_const_array_iterator i = ArrayBegin(GetValue(targetsObject));
+             i != targetsObjectEnd; ++i) {
+            std::map<std::string, int> targetAttribues;
+
+            const json& dict = *i;
+            if (IsObject(dict)) {
+                json_const_iterator dictIt(ObjectBegin(dict));
+                json_const_iterator dictItEnd(ObjectEnd(dict));
+
+                for (; dictIt != dictItEnd; ++dictIt) {
+                    int iVal;
+                    if (GetInt(GetValue(dictIt), iVal))
+                        targetAttribues[GetKey(dictIt)] = iVal;
+                }
+                primitive->targets.emplace_back(std::move(targetAttribues));
+            }
+        }
+    }
+
+    ParseExtrasProperty(&(primitive->extras), o);
+    ParseExtensionsProperty(&primitive->extensions, err, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                primitive->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                primitive->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+#ifdef TINYGLTF_ENABLE_DRACO
+    auto dracoExtension =
+        primitive->extensions.find("KHR_draco_mesh_compression");
+    if (dracoExtension != primitive->extensions.end()) {
+        ParseDracoExtension(primitive, model, err, dracoExtension->second);
+    }
+#else
+    (void)model;
+#endif
+
+    return true;
+}
+
+static bool ParseMesh(Mesh* mesh, Model* model, std::string* err, const json& o,
+                      bool store_original_json_for_extras_and_extensions)
+{
+    ParseStringProperty(&mesh->name, err, o, "name", false);
+
+    mesh->primitives.clear();
+    json_const_iterator primObject;
+    if (FindMember(o, "primitives", primObject) &&
+        IsArray(GetValue(primObject))) {
+        json_const_array_iterator primEnd = ArrayEnd(GetValue(primObject));
+        for (json_const_array_iterator i = ArrayBegin(GetValue(primObject));
+             i != primEnd; ++i) {
+            Primitive primitive;
+            if (ParsePrimitive(&primitive, model, err, *i,
+                               store_original_json_for_extras_and_extensions)) {
+                // Only add the primitive if the parsing succeeds.
+                mesh->primitives.emplace_back(std::move(primitive));
+            }
+        }
+    }
+
+    // Should probably check if has targets and if dimensions fit
+    ParseNumberArrayProperty(&mesh->weights, err, o, "weights", false);
+
+    ParseExtensionsProperty(&mesh->extensions, err, o);
+    ParseExtrasProperty(&(mesh->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                mesh->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                mesh->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseNode(Node* node, std::string* err, const json& o,
+                      bool store_original_json_for_extras_and_extensions)
+{
+    ParseStringProperty(&node->name, err, o, "name", false);
+
+    int skin = -1;
+    ParseIntegerProperty(&skin, err, o, "skin", false);
+    node->skin = skin;
+
+    // Matrix and T/R/S are exclusive
+    if (!ParseNumberArrayProperty(&node->matrix, err, o, "matrix", false)) {
+        ParseNumberArrayProperty(&node->rotation, err, o, "rotation", false);
+        ParseNumberArrayProperty(&node->scale, err, o, "scale", false);
+        ParseNumberArrayProperty(&node->translation, err, o, "translation",
+                                 false);
+    }
+
+    int camera = -1;
+    ParseIntegerProperty(&camera, err, o, "camera", false);
+    node->camera = camera;
+
+    int mesh = -1;
+    ParseIntegerProperty(&mesh, err, o, "mesh", false);
+    node->mesh = mesh;
+
+    node->children.clear();
+    ParseIntegerArrayProperty(&node->children, err, o, "children", false);
+
+    ParseNumberArrayProperty(&node->weights, err, o, "weights", false);
+
+    ParseExtensionsProperty(&node->extensions, err, o);
+    ParseExtrasProperty(&(node->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                node->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                node->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool
+ParsePbrMetallicRoughness(PbrMetallicRoughness* pbr, std::string* err,
+                          const json& o,
+                          bool store_original_json_for_extras_and_extensions)
+{
+    if (pbr == nullptr) {
+        return false;
+    }
+
+    std::vector<double> baseColorFactor;
+    if (ParseNumberArrayProperty(&baseColorFactor, err, o, "baseColorFactor",
+                                 /* required */ false)) {
+        if (baseColorFactor.size() != 4) {
+            if (err) {
+                (*err) += "Array length of `baseColorFactor` parameter in "
+                          "pbrMetallicRoughness must be 4, but got " +
+                          std::to_string(baseColorFactor.size()) + "\n";
+            }
+            return false;
+        }
+        pbr->baseColorFactor = baseColorFactor;
+    }
+
+    {
+        json_const_iterator it;
+        if (FindMember(o, "baseColorTexture", it)) {
+            ParseTextureInfo(&pbr->baseColorTexture, err, GetValue(it),
+                             store_original_json_for_extras_and_extensions);
+        }
+    }
+
+    {
+        json_const_iterator it;
+        if (FindMember(o, "metallicRoughnessTexture", it)) {
+            ParseTextureInfo(&pbr->metallicRoughnessTexture, err, GetValue(it),
+                             store_original_json_for_extras_and_extensions);
+        }
+    }
+
+    ParseNumberProperty(&pbr->metallicFactor, err, o, "metallicFactor", false);
+    ParseNumberProperty(&pbr->roughnessFactor, err, o, "roughnessFactor",
+                        false);
+
+    ParseExtensionsProperty(&pbr->extensions, err, o);
+    ParseExtrasProperty(&pbr->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                pbr->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                pbr->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseMaterial(Material* material, std::string* err, const json& o,
+                          bool store_original_json_for_extras_and_extensions)
+{
+    ParseStringProperty(&material->name, err, o, "name", /* required */ false);
+
+    if (ParseNumberArrayProperty(&material->emissiveFactor, err, o,
+                                 "emissiveFactor",
+                                 /* required */ false)) {
+        if (material->emissiveFactor.size() != 3) {
+            if (err) {
+                (*err) += "Array length of `emissiveFactor` parameter in "
+                          "material must be 3, but got " +
+                          std::to_string(material->emissiveFactor.size()) +
+                          "\n";
+            }
+            return false;
+        }
+    }
+    else {
+        // fill with default values
+        material->emissiveFactor = {0.0, 0.0, 0.0};
+    }
+
+    ParseStringProperty(&material->alphaMode, err, o, "alphaMode",
+                        /* required */ false);
+    ParseNumberProperty(&material->alphaCutoff, err, o, "alphaCutoff",
+                        /* required */ false);
+    ParseBooleanProperty(&material->doubleSided, err, o, "doubleSided",
+                         /* required */ false);
+
+    {
+        json_const_iterator it;
+        if (FindMember(o, "pbrMetallicRoughness", it)) {
+            ParsePbrMetallicRoughness(
+                &material->pbrMetallicRoughness, err, GetValue(it),
+                store_original_json_for_extras_and_extensions);
+        }
+    }
+
+    {
+        json_const_iterator it;
+        if (FindMember(o, "normalTexture", it)) {
+            ParseNormalTextureInfo(
+                &material->normalTexture, err, GetValue(it),
+                store_original_json_for_extras_and_extensions);
+        }
+    }
+
+    {
+        json_const_iterator it;
+        if (FindMember(o, "occlusionTexture", it)) {
+            ParseOcclusionTextureInfo(
+                &material->occlusionTexture, err, GetValue(it),
+                store_original_json_for_extras_and_extensions);
+        }
+    }
+
+    {
+        json_const_iterator it;
+        if (FindMember(o, "emissiveTexture", it)) {
+            ParseTextureInfo(&material->emissiveTexture, err, GetValue(it),
+                             store_original_json_for_extras_and_extensions);
+        }
+    }
+
+    // Old code path. For backward compatibility, we still store material values
+    // as Parameter. This will create duplicated information for
+    // example(pbrMetallicRoughness), but should be negligible in terms of
+    // memory consumption.
+    // TODO(syoyo): Remove in the next major release.
+    material->values.clear();
+    material->additionalValues.clear();
+
+    json_const_iterator it(ObjectBegin(o));
+    json_const_iterator itEnd(ObjectEnd(o));
+
+    for (; it != itEnd; ++it) {
+        std::string key(GetKey(it));
+        if (key == "pbrMetallicRoughness") {
+            if (IsObject(GetValue(it))) {
+                const json& values_object = GetValue(it);
+
+                json_const_iterator itVal(ObjectBegin(values_object));
+                json_const_iterator itValEnd(ObjectEnd(values_object));
+
+                for (; itVal != itValEnd; ++itVal) {
+                    Parameter param;
+                    if (ParseParameterProperty(&param, err, values_object,
+                                               GetKey(itVal), false)) {
+                        material->values.emplace(GetKey(itVal),
+                                                 std::move(param));
+                    }
+                }
+            }
+        }
+        else if (key == "extensions" || key == "extras") {
+            // done later, skip, otherwise poorly parsed contents will be saved
+            // in the parametermap and serialized again later
+        }
+        else {
+            Parameter param;
+            if (ParseParameterProperty(&param, err, o, key, false)) {
+                // names of materials have already been parsed. Putting it in
+                // this map doesn't correctly reflect the glTF specification
+                if (key != "name")
+                    material->additionalValues.emplace(std::move(key),
+                                                       std::move(param));
+            }
+        }
+    }
+
+    material->extensions.clear();
+    ParseExtensionsProperty(&material->extensions, err, o);
+    ParseExtrasProperty(&(material->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator eit;
+            if (FindMember(o, "extensions", eit)) {
+                material->extensions_json_string = JsonToString(GetValue(eit));
+            }
+        }
+        {
+            json_const_iterator eit;
+            if (FindMember(o, "extras", eit)) {
+                material->extras_json_string = JsonToString(GetValue(eit));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool
+ParseAnimationChannel(AnimationChannel* channel, std::string* err,
+                      const json& o,
+                      bool store_original_json_for_extras_and_extensions)
+{
+    int samplerIndex = -1;
+    int targetIndex = -1;
+    if (!ParseIntegerProperty(&samplerIndex, err, o, "sampler", true,
+                              "AnimationChannel")) {
+        if (err) {
+            (*err) += "`sampler` field is missing in animation channels\n";
+        }
+        return false;
+    }
+
+    json_const_iterator targetIt;
+    if (FindMember(o, "target", targetIt) && IsObject(GetValue(targetIt))) {
+        const json& target_object = GetValue(targetIt);
+
+        if (!ParseIntegerProperty(&targetIndex, err, target_object, "node",
+                                  true)) {
+            if (err) {
+                (*err) +=
+                    "`node` field is missing in animation.channels.target\n";
+            }
+            return false;
+        }
+
+        if (!ParseStringProperty(&channel->target_path, err, target_object,
+                                 "path", true)) {
+            if (err) {
+                (*err) +=
+                    "`path` field is missing in animation.channels.target\n";
+            }
+            return false;
+        }
+        ParseExtensionsProperty(&channel->target_extensions, err,
+                                target_object);
+        if (store_original_json_for_extras_and_extensions) {
+            json_const_iterator it;
+            if (FindMember(target_object, "extensions", it)) {
+                channel->target_extensions_json_string =
+                    JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    channel->sampler = samplerIndex;
+    channel->target_node = targetIndex;
+
+    ParseExtensionsProperty(&channel->extensions, err, o);
+    ParseExtrasProperty(&(channel->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                channel->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                channel->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseAnimation(Animation* animation, std::string* err,
+                           const json& o,
+                           bool store_original_json_for_extras_and_extensions)
+{
+    {
+        json_const_iterator channelsIt;
+        if (FindMember(o, "channels", channelsIt) &&
+            IsArray(GetValue(channelsIt))) {
+            json_const_array_iterator channelEnd =
+                ArrayEnd(GetValue(channelsIt));
+            for (json_const_array_iterator i = ArrayBegin(GetValue(channelsIt));
+                 i != channelEnd; ++i) {
+                AnimationChannel channel;
+                if (ParseAnimationChannel(
+                        &channel, err, *i,
+                        store_original_json_for_extras_and_extensions)) {
+                    // Only add the channel if the parsing succeeds.
+                    animation->channels.emplace_back(std::move(channel));
+                }
+            }
+        }
+    }
+
+    {
+        json_const_iterator samplerIt;
+        if (FindMember(o, "samplers", samplerIt) &&
+            IsArray(GetValue(samplerIt))) {
+            const json& sampler_array = GetValue(samplerIt);
+
+            json_const_array_iterator it = ArrayBegin(sampler_array);
+            json_const_array_iterator itEnd = ArrayEnd(sampler_array);
+
+            for (; it != itEnd; ++it) {
+                const json& s = *it;
+
+                AnimationSampler sampler;
+                int inputIndex = -1;
+                int outputIndex = -1;
+                if (!ParseIntegerProperty(&inputIndex, err, s, "input", true)) {
+                    if (err) {
+                        (*err) +=
+                            "`input` field is missing in animation.sampler\n";
+                    }
+                    return false;
+                }
+                ParseStringProperty(&sampler.interpolation, err, s,
+                                    "interpolation", false);
+                if (!ParseIntegerProperty(&outputIndex, err, s, "output",
+                                          true)) {
+                    if (err) {
+                        (*err) +=
+                            "`output` field is missing in animation.sampler\n";
+                    }
+                    return false;
+                }
+                sampler.input = inputIndex;
+                sampler.output = outputIndex;
+                ParseExtensionsProperty(&(sampler.extensions), err, o);
+                ParseExtrasProperty(&(sampler.extras), s);
+
+                if (store_original_json_for_extras_and_extensions) {
+                    {
+                        json_const_iterator eit;
+                        if (FindMember(o, "extensions", eit)) {
+                            sampler.extensions_json_string =
+                                JsonToString(GetValue(eit));
+                        }
+                    }
+                    {
+                        json_const_iterator eit;
+                        if (FindMember(o, "extras", eit)) {
+                            sampler.extras_json_string =
+                                JsonToString(GetValue(eit));
+                        }
+                    }
+                }
+
+                animation->samplers.emplace_back(std::move(sampler));
+            }
+        }
+    }
+
+    ParseStringProperty(&animation->name, err, o, "name", false);
+
+    ParseExtensionsProperty(&animation->extensions, err, o);
+    ParseExtrasProperty(&(animation->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                animation->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                animation->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseSampler(Sampler* sampler, std::string* err, const json& o,
+                         bool store_original_json_for_extras_and_extensions)
+{
+    ParseStringProperty(&sampler->name, err, o, "name", false);
+
+    int minFilter = -1;
+    int magFilter = -1;
+    int wrapS = TINYGLTF_TEXTURE_WRAP_REPEAT;
+    int wrapT = TINYGLTF_TEXTURE_WRAP_REPEAT;
+    // int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT;
+    ParseIntegerProperty(&minFilter, err, o, "minFilter", false);
+    ParseIntegerProperty(&magFilter, err, o, "magFilter", false);
+    ParseIntegerProperty(&wrapS, err, o, "wrapS", false);
+    ParseIntegerProperty(&wrapT, err, o, "wrapT", false);
+    // ParseIntegerProperty(&wrapR, err, o, "wrapR", false);  // tinygltf
+    // extension
+
+    // TODO(syoyo): Check the value is allowed one.
+    // (e.g. we allow 9728(NEAREST), but don't allow 9727)
+
+    sampler->minFilter = minFilter;
+    sampler->magFilter = magFilter;
+    sampler->wrapS = wrapS;
+    sampler->wrapT = wrapT;
+    // sampler->wrapR = wrapR;
+
+    ParseExtensionsProperty(&(sampler->extensions), err, o);
+    ParseExtrasProperty(&(sampler->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                sampler->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                sampler->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseSkin(Skin* skin, std::string* err, const json& o,
+                      bool store_original_json_for_extras_and_extensions)
+{
+    ParseStringProperty(&skin->name, err, o, "name", false, "Skin");
+
+    std::vector<int> joints;
+    if (!ParseIntegerArrayProperty(&joints, err, o, "joints", false, "Skin")) {
+        return false;
+    }
+    skin->joints = std::move(joints);
+
+    int skeleton = -1;
+    ParseIntegerProperty(&skeleton, err, o, "skeleton", false, "Skin");
+    skin->skeleton = skeleton;
+
+    int invBind = -1;
+    ParseIntegerProperty(&invBind, err, o, "inverseBindMatrices", true, "Skin");
+    skin->inverseBindMatrices = invBind;
+
+    ParseExtensionsProperty(&(skin->extensions), err, o);
+    ParseExtrasProperty(&(skin->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                skin->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                skin->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool
+ParsePerspectiveCamera(PerspectiveCamera* camera, std::string* err,
+                       const json& o,
+                       bool store_original_json_for_extras_and_extensions)
+{
+    double yfov = 0.0;
+    if (!ParseNumberProperty(&yfov, err, o, "yfov", true,
+                             "OrthographicCamera")) {
+        return false;
+    }
+
+    double znear = 0.0;
+    if (!ParseNumberProperty(&znear, err, o, "znear", true,
+                             "PerspectiveCamera")) {
+        return false;
+    }
+
+    double aspectRatio = 0.0; // = invalid
+    ParseNumberProperty(&aspectRatio, err, o, "aspectRatio", false,
+                        "PerspectiveCamera");
+
+    double zfar = 0.0; // = invalid
+    ParseNumberProperty(&zfar, err, o, "zfar", false, "PerspectiveCamera");
+
+    camera->aspectRatio = aspectRatio;
+    camera->zfar = zfar;
+    camera->yfov = yfov;
+    camera->znear = znear;
+
+    ParseExtensionsProperty(&camera->extensions, err, o);
+    ParseExtrasProperty(&(camera->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                camera->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                camera->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    // TODO(syoyo): Validate parameter values.
+
+    return true;
+}
+
+static bool ParseSpotLight(SpotLight* light, std::string* err, const json& o,
+                           bool store_original_json_for_extras_and_extensions)
+{
+    ParseNumberProperty(&light->innerConeAngle, err, o, "innerConeAngle",
+                        false);
+    ParseNumberProperty(&light->outerConeAngle, err, o, "outerConeAngle",
+                        false);
+
+    ParseExtensionsProperty(&light->extensions, err, o);
+    ParseExtrasProperty(&light->extras, o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                light->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                light->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    // TODO(syoyo): Validate parameter values.
+
+    return true;
+}
+
+static bool
+ParseOrthographicCamera(OrthographicCamera* camera, std::string* err,
+                        const json& o,
+                        bool store_original_json_for_extras_and_extensions)
+{
+    double xmag = 0.0;
+    if (!ParseNumberProperty(&xmag, err, o, "xmag", true,
+                             "OrthographicCamera")) {
+        return false;
+    }
+
+    double ymag = 0.0;
+    if (!ParseNumberProperty(&ymag, err, o, "ymag", true,
+                             "OrthographicCamera")) {
+        return false;
+    }
+
+    double zfar = 0.0;
+    if (!ParseNumberProperty(&zfar, err, o, "zfar", true,
+                             "OrthographicCamera")) {
+        return false;
+    }
+
+    double znear = 0.0;
+    if (!ParseNumberProperty(&znear, err, o, "znear", true,
+                             "OrthographicCamera")) {
+        return false;
+    }
+
+    ParseExtensionsProperty(&camera->extensions, err, o);
+    ParseExtrasProperty(&(camera->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                camera->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                camera->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    camera->xmag = xmag;
+    camera->ymag = ymag;
+    camera->zfar = zfar;
+    camera->znear = znear;
+
+    // TODO(syoyo): Validate parameter values.
+
+    return true;
+}
+
+static bool ParseCamera(Camera* camera, std::string* err, const json& o,
+                        bool store_original_json_for_extras_and_extensions)
+{
+    if (!ParseStringProperty(&camera->type, err, o, "type", true, "Camera")) {
+        return false;
+    }
+
+    if (camera->type.compare("orthographic") == 0) {
+        json_const_iterator orthoIt;
+        if (!FindMember(o, "orthographic", orthoIt)) {
+            if (err) {
+                std::stringstream ss;
+                ss << "Orthographic camera description not found." << std::endl;
+                (*err) += ss.str();
+            }
+            return false;
+        }
+
+        const json& v = GetValue(orthoIt);
+        if (!IsObject(v)) {
+            if (err) {
+                std::stringstream ss;
+                ss << "\"orthographic\" is not a JSON object." << std::endl;
+                (*err) += ss.str();
+            }
+            return false;
+        }
+
+        if (!ParseOrthographicCamera(
+                &camera->orthographic, err, v,
+                store_original_json_for_extras_and_extensions)) {
+            return false;
+        }
+    }
+    else if (camera->type.compare("perspective") == 0) {
+        json_const_iterator perspIt;
+        if (!FindMember(o, "perspective", perspIt)) {
+            if (err) {
+                std::stringstream ss;
+                ss << "Perspective camera description not found." << std::endl;
+                (*err) += ss.str();
+            }
+            return false;
+        }
+
+        const json& v = GetValue(perspIt);
+        if (!IsObject(v)) {
+            if (err) {
+                std::stringstream ss;
+                ss << "\"perspective\" is not a JSON object." << std::endl;
+                (*err) += ss.str();
+            }
+            return false;
+        }
+
+        if (!ParsePerspectiveCamera(
+                &camera->perspective, err, v,
+                store_original_json_for_extras_and_extensions)) {
+            return false;
+        }
+    }
+    else {
+        if (err) {
+            std::stringstream ss;
+            ss << "Invalid camera type: \"" << camera->type
+               << "\". Must be \"perspective\" or \"orthographic\""
+               << std::endl;
+            (*err) += ss.str();
+        }
+        return false;
+    }
+
+    ParseStringProperty(&camera->name, err, o, "name", false);
+
+    ParseExtensionsProperty(&camera->extensions, err, o);
+    ParseExtrasProperty(&(camera->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                camera->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                camera->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+static bool ParseLight(Light* light, std::string* err, const json& o,
+                       bool store_original_json_for_extras_and_extensions)
+{
+    if (!ParseStringProperty(&light->type, err, o, "type", true)) {
+        return false;
+    }
+
+    if (light->type == "spot") {
+        json_const_iterator spotIt;
+        if (!FindMember(o, "spot", spotIt)) {
+            if (err) {
+                std::stringstream ss;
+                ss << "Spot light description not found." << std::endl;
+                (*err) += ss.str();
+            }
+            return false;
+        }
+
+        const json& v = GetValue(spotIt);
+        if (!IsObject(v)) {
+            if (err) {
+                std::stringstream ss;
+                ss << "\"spot\" is not a JSON object." << std::endl;
+                (*err) += ss.str();
+            }
+            return false;
+        }
+
+        if (!ParseSpotLight(&light->spot, err, v,
+                            store_original_json_for_extras_and_extensions)) {
+            return false;
+        }
+    }
+
+    ParseStringProperty(&light->name, err, o, "name", false);
+    ParseNumberArrayProperty(&light->color, err, o, "color", false);
+    ParseNumberProperty(&light->range, err, o, "range", false);
+    ParseNumberProperty(&light->intensity, err, o, "intensity", false);
+    ParseExtensionsProperty(&light->extensions, err, o);
+    ParseExtrasProperty(&(light->extras), o);
+
+    if (store_original_json_for_extras_and_extensions) {
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                light->extensions_json_string = JsonToString(GetValue(it));
+            }
+        }
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extras", it)) {
+                light->extras_json_string = JsonToString(GetValue(it));
+            }
+        }
+    }
+
+    return true;
+}
+
+bool TinyGLTF::LoadFromString(Model* model, std::string* err, std::string* warn,
+                              const char* json_str,
+                              unsigned int json_str_length,
+                              const std::string& base_dir,
+                              unsigned int check_sections)
+{
+    if (json_str_length < 4) {
+        if (err) {
+            (*err) = "JSON string too short.\n";
+        }
+        return false;
+    }
+
+    JsonDocument v;
+
+#if (defined(__cpp_exceptions) || defined(__EXCEPTIONS) ||                     \
+     defined(_CPPUNWIND)) &&                                                   \
+    !defined(TINYGLTF_NOEXCEPTION)
+    try {
+        JsonParse(v, json_str, json_str_length, true);
+    }
+    catch (const std::exception& e) {
+        if (err) {
+            (*err) = e.what();
+        }
+        return false;
+    }
+#else
+    {
+        JsonParse(v, json_str, json_str_length);
+
+        if (!IsObject(v)) {
+            // Assume parsing was failed.
+            if (err) {
+                (*err) = "Failed to parse JSON object\n";
+            }
+            return false;
+        }
+    }
+#endif
+
+    if (!IsObject(v)) {
+        // root is not an object.
+        if (err) {
+            (*err) = "Root element is not a JSON object\n";
+        }
+        return false;
+    }
+
+    {
+        bool version_found = false;
+        json_const_iterator it;
+        if (FindMember(v, "asset", it) && IsObject(GetValue(it))) {
+            auto& itObj = GetValue(it);
+            json_const_iterator version_it;
+            std::string versionStr;
+            if (FindMember(itObj, "version", version_it) &&
+                GetString(GetValue(version_it), versionStr)) {
+                version_found = true;
+            }
+        }
+        if (version_found) {
+            // OK
+        }
+        else if (check_sections & REQUIRE_VERSION) {
+            if (err) {
+                (*err) += "\"asset\" object not found in .gltf or not an "
+                          "object type\n";
+            }
+            return false;
+        }
+    }
+
+    // scene is not mandatory.
+    // FIXME Maybe a better way to handle it than removing the code
+
+    auto IsArrayMemberPresent = [](const json& _v, const char* name) -> bool {
+        json_const_iterator it;
+        return FindMember(_v, name, it) && IsArray(GetValue(it));
+    };
+
+    {
+        if ((check_sections & REQUIRE_SCENES) &&
+            !IsArrayMemberPresent(v, "scenes")) {
+            if (err) {
+                (*err) += "\"scenes\" object not found in .gltf or not an "
+                          "array type\n";
+            }
+            return false;
+        }
+    }
+
+    {
+        if ((check_sections & REQUIRE_NODES) &&
+            !IsArrayMemberPresent(v, "nodes")) {
+            if (err) {
+                (*err) += "\"nodes\" object not found in .gltf\n";
+            }
+            return false;
+        }
+    }
+
+    {
+        if ((check_sections & REQUIRE_ACCESSORS) &&
+            !IsArrayMemberPresent(v, "accessors")) {
+            if (err) {
+                (*err) += "\"accessors\" object not found in .gltf\n";
+            }
+            return false;
+        }
+    }
+
+    {
+        if ((check_sections & REQUIRE_BUFFERS) &&
+            !IsArrayMemberPresent(v, "buffers")) {
+            if (err) {
+                (*err) += "\"buffers\" object not found in .gltf\n";
+            }
+            return false;
+        }
+    }
+
+    {
+        if ((check_sections & REQUIRE_BUFFER_VIEWS) &&
+            !IsArrayMemberPresent(v, "bufferViews")) {
+            if (err) {
+                (*err) += "\"bufferViews\" object not found in .gltf\n";
+            }
+            return false;
+        }
+    }
+
+    model->buffers.clear();
+    model->bufferViews.clear();
+    model->accessors.clear();
+    model->meshes.clear();
+    model->cameras.clear();
+    model->nodes.clear();
+    model->extensionsUsed.clear();
+    model->extensionsRequired.clear();
+    model->extensions.clear();
+    model->defaultScene = -1;
+
+    // 1. Parse Asset
+    {
+        json_const_iterator it;
+        if (FindMember(v, "asset", it) && IsObject(GetValue(it))) {
+            const json& root = GetValue(it);
+
+            ParseAsset(&model->asset, err, root,
+                       store_original_json_for_extras_and_extensions_);
+        }
+    }
+
+#ifdef TINYGLTF_USE_CPP14
+    auto ForEachInArray = [](const json& _v, const char* member,
+                             const auto& cb) -> bool
+#else
+    // The std::function<> implementation can be less efficient because it will
+    // allocate heap when the size of the captured lambda is above 16 bytes with
+    // clang and gcc, but it does not require C++14.
+    auto ForEachInArray = [](const json& _v, const char* member,
+                             const std::function<bool(const json&)>& cb) -> bool
+#endif
+    {
+        json_const_iterator itm;
+        if (FindMember(_v, member, itm) && IsArray(GetValue(itm))) {
+            const json& root = GetValue(itm);
+            auto it = ArrayBegin(root);
+            auto end = ArrayEnd(root);
+            for (; it != end; ++it) {
+                if (!cb(*it))
+                    return false;
+            }
+        }
+        return true;
+    };
+
+    // 2. Parse extensionUsed
+    {
+        ForEachInArray(v, "extensionsUsed", [&](const json& o) {
+            std::string str;
+            GetString(o, str);
+            model->extensionsUsed.emplace_back(std::move(str));
+            return true;
+        });
+    }
+
+    {
+        ForEachInArray(v, "extensionsRequired", [&](const json& o) {
+            std::string str;
+            GetString(o, str);
+            model->extensionsRequired.emplace_back(std::move(str));
+            return true;
+        });
+    }
+
+    // 3. Parse Buffer
+    {
+        bool success = ForEachInArray(v, "buffers", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`buffers' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Buffer buffer;
+            if (!ParseBuffer(&buffer, err, o,
+                             store_original_json_for_extras_and_extensions_,
+                             &fs, base_dir, is_binary_, bin_data_, bin_size_)) {
+                return false;
+            }
+
+            model->buffers.emplace_back(std::move(buffer));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+    // 4. Parse BufferView
+    {
+        bool success = ForEachInArray(v, "bufferViews", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`bufferViews' does not contain an JSON object.";
+                }
+                return false;
+            }
+            BufferView bufferView;
+            if (!ParseBufferView(
+                    &bufferView, err, o,
+                    store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->bufferViews.emplace_back(std::move(bufferView));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 5. Parse Accessor
+    {
+        bool success = ForEachInArray(v, "accessors", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`accessors' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Accessor accessor;
+            if (!ParseAccessor(
+                    &accessor, err, o,
+                    store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->accessors.emplace_back(std::move(accessor));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 6. Parse Mesh
+    {
+        bool success = ForEachInArray(v, "meshes", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`meshes' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Mesh mesh;
+            if (!ParseMesh(&mesh, model, err, o,
+                           store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->meshes.emplace_back(std::move(mesh));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // Assign missing bufferView target types
+    // - Look for missing Mesh indices
+    // - Look for missing Mesh attributes
+    for (auto& mesh : model->meshes) {
+        for (auto& primitive : mesh.primitives) {
+            if (primitive.indices > -1) // has indices from parsing step, must
+                                        // be Element Array Buffer
+            {
+                if (size_t(primitive.indices) >= model->accessors.size()) {
+                    if (err) {
+                        (*err) += "primitive indices accessor out of bounds";
+                    }
+                    return false;
+                }
+
+                auto bufferView =
+                    model->accessors[size_t(primitive.indices)].bufferView;
+                if (bufferView < 0 ||
+                    size_t(bufferView) >= model->bufferViews.size()) {
+                    if (err) {
+                        (*err) += "accessor[" +
+                                  std::to_string(primitive.indices) +
+                                  "] invalid bufferView";
+                    }
+                    return false;
+                }
+
+                model->bufferViews[size_t(bufferView)].target =
+                    TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER;
+                // we could optionally check if accessors' bufferView type is
+                // Scalar, as it should be
+            }
+
+            for (auto& attribute : primitive.attributes) {
+                const auto accessorsIndex = size_t(attribute.second);
+                if (accessorsIndex < model->accessors.size()) {
+                    const auto bufferView =
+                        model->accessors[accessorsIndex].bufferView;
+                    // bufferView could be null(-1) for sparse morph target
+                    if (bufferView >= 0 &&
+                        bufferView < (int)model->bufferViews.size()) {
+                        model->bufferViews[size_t(bufferView)].target =
+                            TINYGLTF_TARGET_ARRAY_BUFFER;
+                    }
+                }
+            }
+
+            for (auto& target : primitive.targets) {
+                for (auto& attribute : target) {
+                    const auto accessorsIndex = size_t(attribute.second);
+                    if (accessorsIndex < model->accessors.size()) {
+                        const auto bufferView =
+                            model->accessors[accessorsIndex].bufferView;
+                        // bufferView could be null(-1) for sparse morph target
+                        if (bufferView >= 0 &&
+                            bufferView < (int)model->bufferViews.size()) {
+                            model->bufferViews[size_t(bufferView)].target =
+                                TINYGLTF_TARGET_ARRAY_BUFFER;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    // 7. Parse Node
+    {
+        bool success = ForEachInArray(v, "nodes", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`nodes' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Node node;
+            if (!ParseNode(&node, err, o,
+                           store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->nodes.emplace_back(std::move(node));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 8. Parse scenes.
+    {
+        bool success = ForEachInArray(v, "scenes", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`scenes' does not contain an JSON object.";
+                }
+                return false;
+            }
+            std::vector<int> nodes;
+            ParseIntegerArrayProperty(&nodes, err, o, "nodes", false);
+
+            Scene scene;
+            scene.nodes = std::move(nodes);
+
+            ParseStringProperty(&scene.name, err, o, "name", false);
+
+            ParseExtensionsProperty(&scene.extensions, err, o);
+            ParseExtrasProperty(&scene.extras, o);
+
+            if (store_original_json_for_extras_and_extensions_) {
+                {
+                    json_const_iterator it;
+                    if (FindMember(o, "extensions", it)) {
+                        scene.extensions_json_string =
+                            JsonToString(GetValue(it));
+                    }
+                }
+                {
+                    json_const_iterator it;
+                    if (FindMember(o, "extras", it)) {
+                        scene.extras_json_string = JsonToString(GetValue(it));
+                    }
+                }
+            }
+
+            model->scenes.emplace_back(std::move(scene));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 9. Parse default scenes.
+    {
+        json_const_iterator rootIt;
+        int iVal;
+        if (FindMember(v, "scene", rootIt) && GetInt(GetValue(rootIt), iVal)) {
+            model->defaultScene = iVal;
+        }
+    }
+
+    // 10. Parse Material
+    {
+        bool success = ForEachInArray(v, "materials", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`materials' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Material material;
+            ParseStringProperty(&material.name, err, o, "name", false);
+
+            if (!ParseMaterial(
+                    &material, err, o,
+                    store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->materials.emplace_back(std::move(material));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 11. Parse Image
+    void* load_image_user_data{nullptr};
+
+    LoadImageDataOption load_image_option;
+
+    if (user_image_loader_) {
+        // Use user supplied pointer
+        load_image_user_data = load_image_user_data_;
+    }
+    else {
+        load_image_option.preserve_channels = preserve_image_channels_;
+        load_image_user_data = reinterpret_cast<void*>(&load_image_option);
+    }
+
+    {
+        int idx = 0;
+        bool success = ForEachInArray(v, "images", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "image[" + std::to_string(idx) +
+                              "] is not a JSON object.";
+                }
+                return false;
+            }
+            Image image;
+            if (!ParseImage(&image, idx, err, warn, o,
+                            store_original_json_for_extras_and_extensions_,
+                            base_dir, &fs, &this->LoadImageData,
+                            load_image_user_data)) {
+                return false;
+            }
+
+            if (image.bufferView != -1) {
+                // Load image from the buffer view.
+                if (size_t(image.bufferView) >= model->bufferViews.size()) {
+                    if (err) {
+                        std::stringstream ss;
+                        ss << "image[" << idx << "] bufferView \""
+                           << image.bufferView << "\" not found in the scene."
+                           << std::endl;
+                        (*err) += ss.str();
+                    }
+                    return false;
+                }
+
+                const BufferView& bufferView =
+                    model->bufferViews[size_t(image.bufferView)];
+                if (size_t(bufferView.buffer) >= model->buffers.size()) {
+                    if (err) {
+                        std::stringstream ss;
+                        ss << "image[" << idx << "] buffer \""
+                           << bufferView.buffer << "\" not found in the scene."
+                           << std::endl;
+                        (*err) += ss.str();
+                    }
+                    return false;
+                }
+                const Buffer& buffer =
+                    model->buffers[size_t(bufferView.buffer)];
+
+                if (*LoadImageData == nullptr) {
+                    if (err) {
+                        (*err) += "No LoadImageData callback specified.\n";
+                    }
+                    return false;
+                }
+                bool ret = LoadImageData(
+                    &image, idx, err, warn, image.width, image.height,
+                    &buffer.data[bufferView.byteOffset],
+                    static_cast<int>(bufferView.byteLength),
+                    load_image_user_data);
+                if (!ret) {
+                    return false;
+                }
+            }
+
+            model->images.emplace_back(std::move(image));
+            ++idx;
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 12. Parse Texture
+    {
+        bool success = ForEachInArray(v, "textures", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`textures' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Texture texture;
+            if (!ParseTexture(&texture, err, o,
+                              store_original_json_for_extras_and_extensions_,
+                              base_dir)) {
+                return false;
+            }
+
+            model->textures.emplace_back(std::move(texture));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 13. Parse Animation
+    {
+        bool success = ForEachInArray(v, "animations", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`animations' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Animation animation;
+            if (!ParseAnimation(
+                    &animation, err, o,
+                    store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->animations.emplace_back(std::move(animation));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 14. Parse Skin
+    {
+        bool success = ForEachInArray(v, "skins", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`skins' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Skin skin;
+            if (!ParseSkin(&skin, err, o,
+                           store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->skins.emplace_back(std::move(skin));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 15. Parse Sampler
+    {
+        bool success = ForEachInArray(v, "samplers", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`samplers' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Sampler sampler;
+            if (!ParseSampler(&sampler, err, o,
+                              store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->samplers.emplace_back(std::move(sampler));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 16. Parse Camera
+    {
+        bool success = ForEachInArray(v, "cameras", [&](const json& o) {
+            if (!IsObject(o)) {
+                if (err) {
+                    (*err) += "`cameras' does not contain an JSON object.";
+                }
+                return false;
+            }
+            Camera camera;
+            if (!ParseCamera(&camera, err, o,
+                             store_original_json_for_extras_and_extensions_)) {
+                return false;
+            }
+
+            model->cameras.emplace_back(std::move(camera));
+            return true;
+        });
+
+        if (!success) {
+            return false;
+        }
+    }
+
+    // 17. Parse Extensions
+    ParseExtensionsProperty(&model->extensions, err, v);
+
+    // 18. Specific extension implementations
+    {
+        json_const_iterator rootIt;
+        if (FindMember(v, "extensions", rootIt) && IsObject(GetValue(rootIt))) {
+            const json& root = GetValue(rootIt);
+
+            json_const_iterator it(ObjectBegin(root));
+            json_const_iterator itEnd(ObjectEnd(root));
+            for (; it != itEnd; ++it) {
+                // parse KHR_lights_punctual extension
+                std::string key(GetKey(it));
+                if ((key == "KHR_lights_punctual") && IsObject(GetValue(it))) {
+                    const json& object = GetValue(it);
+                    json_const_iterator itLight;
+                    if (FindMember(object, "lights", itLight)) {
+                        const json& lights = GetValue(itLight);
+                        if (!IsArray(lights)) {
+                            continue;
+                        }
+
+                        auto arrayIt(ArrayBegin(lights));
+                        auto arrayItEnd(ArrayEnd(lights));
+                        for (; arrayIt != arrayItEnd; ++arrayIt) {
+                            Light light;
+                            if (!ParseLight(
+                                    &light, err, *arrayIt,
+                                    store_original_json_for_extras_and_extensions_)) {
+                                return false;
+                            }
+                            model->lights.emplace_back(std::move(light));
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    // 19. Parse Extras
+    ParseExtrasProperty(&model->extras, v);
+
+    if (store_original_json_for_extras_and_extensions_) {
+        model->extras_json_string = JsonToString(v["extras"]);
+        model->extensions_json_string = JsonToString(v["extensions"]);
+    }
+
+    return true;
+}
+
+bool TinyGLTF::LoadASCIIFromString(Model* model, std::string* err,
+                                   std::string* warn, const char* str,
+                                   unsigned int length,
+                                   const std::string& base_dir,
+                                   unsigned int check_sections)
+{
+    is_binary_ = false;
+    bin_data_ = nullptr;
+    bin_size_ = 0;
+
+    return LoadFromString(model, err, warn, str, length, base_dir,
+                          check_sections);
+}
+
+bool TinyGLTF::LoadASCIIFromFile(Model* model, std::string* err,
+                                 std::string* warn, const std::string& filename,
+                                 unsigned int check_sections)
+{
+    std::stringstream ss;
+
+    if (fs.ReadWholeFile == nullptr) {
+        // Programmer error, assert() ?
+        ss << "Failed to read file: " << filename
+           << ": one or more FS callback not set" << std::endl;
+        if (err) {
+            (*err) = ss.str();
+        }
+        return false;
+    }
+
+    std::vector<unsigned char> data;
+    std::string fileerr;
+    bool fileread = fs.ReadWholeFile(&data, &fileerr, filename, fs.user_data);
+    if (!fileread) {
+        ss << "Failed to read file: " << filename << ": " << fileerr
+           << std::endl;
+        if (err) {
+            (*err) = ss.str();
+        }
+        return false;
+    }
+
+    size_t sz = data.size();
+    if (sz == 0) {
+        if (err) {
+            (*err) = "Empty file.";
+        }
+        return false;
+    }
+
+    std::string basedir = GetBaseDir(filename);
+
+    bool ret = LoadASCIIFromString(
+        model, err, warn, reinterpret_cast<const char*>(&data.at(0)),
+        static_cast<unsigned int>(data.size()), basedir, check_sections);
+
+    return ret;
+}
+
+bool TinyGLTF::LoadBinaryFromMemory(Model* model, std::string* err,
+                                    std::string* warn,
+                                    const unsigned char* bytes,
+                                    unsigned int size,
+                                    const std::string& base_dir,
+                                    unsigned int check_sections)
+{
+    if (size < 20) {
+        if (err) {
+            (*err) = "Too short data size for glTF Binary.";
+        }
+        return false;
+    }
+
+    if (bytes[0] == 'g' && bytes[1] == 'l' && bytes[2] == 'T' &&
+        bytes[3] == 'F') {
+        // ok
+    }
+    else {
+        if (err) {
+            (*err) = "Invalid magic.";
+        }
+        return false;
+    }
+
+    unsigned int version;       // 4 bytes
+    unsigned int length;        // 4 bytes
+    unsigned int chunk0_length; // 4 bytes
+    unsigned int chunk0_format; // 4 bytes;
+
+    memcpy(&version, bytes + 4, 4);
+    swap4(&version);
+    memcpy(&length, bytes + 8, 4);
+    swap4(&length);
+    memcpy(&chunk0_length, bytes + 12, 4); // JSON data length
+    swap4(&chunk0_length);
+    memcpy(&chunk0_format, bytes + 16, 4);
+    swap4(&chunk0_format);
+
+    // https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#binary-gltf-layout
+    //
+    // In case the Bin buffer is not present, the size is exactly 20 + size of
+    // JSON contents,
+    // so use "greater than" operator.
+    //
+    // https://github.com/syoyo/tinygltf/issues/372
+    // Use 64bit uint to avoid integer overflow.
+    uint64_t header_and_json_size = 20ull + uint64_t(chunk0_length);
+
+    if (header_and_json_size > std::numeric_limits<uint32_t>::max()) {
+        // Do not allow 4GB or more GLB data.
+        (*err) = "Invalid glTF binary. GLB data exceeds 4GB.";
+    }
+
+    if ((header_and_json_size > uint64_t(size)) || (chunk0_length < 1) ||
+        (length > size) || (header_and_json_size > uint64_t(length)) ||
+        (chunk0_format != 0x4E4F534A)) { // 0x4E4F534A = JSON format.
+        if (err) {
+            (*err) = "Invalid glTF binary.";
+        }
+        return false;
+    }
+
+    // Padding check
+    // The start and the end of each chunk must be aligned to a 4-byte boundary.
+    // No padding check for chunk0 start since its 4byte-boundary is ensured.
+    if ((header_and_json_size % 4) != 0) {
+        if (err) {
+            (*err) = "JSON Chunk end does not aligned to a 4-byte boundary.";
+        }
+    }
+
+    // std::cout << "header_and_json_size = " << header_and_json_size << "\n";
+    // std::cout << "length = " << length << "\n";
+
+    // Chunk1(BIN) data
+    // The spec says: When the binary buffer is empty or when it is stored by
+    // other means, this chunk SHOULD be omitted. So when header + JSON data ==
+    // binary size, Chunk1 is omitted.
+    if (header_and_json_size == uint64_t(length)) {
+
+        bin_data_ = nullptr;
+        bin_size_ = 0;
+    }
+    else {
+        // Read Chunk1 info(BIN data)
+        // At least Chunk1 should have 12 bytes(8 bytes(header) + 4 bytes(bin
+        // payload could be 1~3 bytes, but need to be aligned to 4 bytes)
+        if ((header_and_json_size + 12ull) > uint64_t(length)) {
+            if (err) {
+                (*err) =
+                    "Insufficient storage space for Chunk1(BIN data). At least "
+                    "Chunk1 Must have 4 bytes or more bytes, but got " +
+                    std::to_string((header_and_json_size + 12ull) -
+                                   uint64_t(length)) +
+                    ".\n";
+            }
+            return false;
+        }
+
+        unsigned int chunk1_length; // 4 bytes
+        unsigned int chunk1_format; // 4 bytes;
+        memcpy(&chunk1_length, bytes + header_and_json_size,
+               4); // JSON data length
+        swap4(&chunk1_length);
+        memcpy(&chunk1_format, bytes + header_and_json_size + 4, 4);
+        swap4(&chunk1_format);
+
+        // std::cout << "chunk1_length = " << chunk1_length << "\n";
+
+        if (chunk1_length < 4) {
+            if (err) {
+                (*err) = "Insufficient Chunk1(BIN) data size.";
+            }
+            return false;
+        }
+
+        if ((chunk1_length % 4) != 0) {
+            if (err) {
+                (*err) = "BIN Chunk end does not aligned to a 4-byte boundary.";
+            }
+            return false;
+        }
+
+        if (uint64_t(chunk1_length) + header_and_json_size > uint64_t(length)) {
+            if (err) {
+                (*err) = "BIN Chunk data length exceeds the GLB size.";
+            }
+            return false;
+        }
+
+        if (chunk1_format != 0x004e4942) {
+            if (err) {
+                (*err) = "Invalid type for chunk1 data.";
+            }
+            return false;
+        }
+
+        // std::cout << "chunk1_length = " << chunk1_length << "\n";
+
+        bin_data_ =
+            bytes + header_and_json_size +
+            8; // 4 bytes (bin_buffer_length) + 4 bytes(bin_buffer_format)
+
+        bin_size_ = size_t(chunk1_length);
+    }
+
+    // Extract JSON string.
+    std::string jsonString(reinterpret_cast<const char*>(&bytes[20]),
+                           chunk0_length);
+
+    is_binary_ = true;
+
+    bool ret = LoadFromString(model, err, warn,
+                              reinterpret_cast<const char*>(&bytes[20]),
+                              chunk0_length, base_dir, check_sections);
+    if (!ret) {
+        return ret;
+    }
+
+    return true;
+}
+
+bool TinyGLTF::LoadBinaryFromFile(Model* model, std::string* err,
+                                  std::string* warn,
+                                  const std::string& filename,
+                                  unsigned int check_sections)
+{
+    std::stringstream ss;
+
+    if (fs.ReadWholeFile == nullptr) {
+        // Programmer error, assert() ?
+        ss << "Failed to read file: " << filename
+           << ": one or more FS callback not set" << std::endl;
+        if (err) {
+            (*err) = ss.str();
+        }
+        return false;
+    }
+
+    std::vector<unsigned char> data;
+    std::string fileerr;
+    bool fileread = fs.ReadWholeFile(&data, &fileerr, filename, fs.user_data);
+    if (!fileread) {
+        ss << "Failed to read file: " << filename << ": " << fileerr
+           << std::endl;
+        if (err) {
+            (*err) = ss.str();
+        }
+        return false;
+    }
+
+    std::string basedir = GetBaseDir(filename);
+
+    bool ret = LoadBinaryFromMemory(model, err, warn, &data.at(0),
+                                    static_cast<unsigned int>(data.size()),
+                                    basedir, check_sections);
+
+    return ret;
+}
+
+///////////////////////
+// GLTF Serialization
+///////////////////////
+namespace {
+json JsonFromString(const char* s)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return json(s, GetAllocator());
+#else
+    return json(s);
+#endif
+}
+
+void JsonAssign(json& dest, const json& src)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    dest.CopyFrom(src, GetAllocator());
+#else
+    dest = src;
+#endif
+}
+
+void JsonAddMember(json& o, const char* key, json&& value)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    if (!o.IsObject()) {
+        o.SetObject();
+    }
+    o.AddMember(json(key, GetAllocator()), std::move(value), GetAllocator());
+#else
+    o[key] = std::move(value);
+#endif
+}
+
+void JsonPushBack(json& o, json&& value)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    o.PushBack(std::move(value), GetAllocator());
+#else
+    o.push_back(std::move(value));
+#endif
+}
+
+bool JsonIsNull(const json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    return o.IsNull();
+#else
+    return o.is_null();
+#endif
+}
+
+void JsonSetObject(json& o)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    o.SetObject();
+#else
+    o = o.object({});
+#endif
+}
+
+void JsonReserveArray(json& o, size_t s)
+{
+#ifdef TINYGLTF_USE_RAPIDJSON
+    o.SetArray();
+    o.Reserve(static_cast<rapidjson::SizeType>(s), GetAllocator());
+#endif
+    (void)(o);
+    (void)(s);
+}
+} // namespace
+
+// typedef std::pair<std::string, json> json_object_pair;
+
+template <typename T>
+static void SerializeNumberProperty(const std::string& key, T number, json& obj)
+{
+    // obj.insert(
+    //    json_object_pair(key, json(static_cast<double>(number))));
+    // obj[key] = static_cast<double>(number);
+    JsonAddMember(obj, key.c_str(), json(number));
+}
+
+#ifdef TINYGLTF_USE_RAPIDJSON
+template <>
+void SerializeNumberProperty(const std::string& key, size_t number, json& obj)
+{
+    JsonAddMember(obj, key.c_str(), json(static_cast<uint64_t>(number)));
+}
+#endif
+
+template <typename T>
+static void SerializeNumberArrayProperty(const std::string& key,
+                                         const std::vector<T>& value, json& obj)
+{
+    if (value.empty())
+        return;
+
+    json ary;
+    JsonReserveArray(ary, value.size());
+    for (const auto& s : value) {
+        JsonPushBack(ary, json(s));
+    }
+    JsonAddMember(obj, key.c_str(), std::move(ary));
+}
+
+static void SerializeStringProperty(const std::string& key,
+                                    const std::string& value, json& obj)
+{
+    JsonAddMember(obj, key.c_str(), JsonFromString(value.c_str()));
+}
+
+static void SerializeStringArrayProperty(const std::string& key,
+                                         const std::vector<std::string>& value,
+                                         json& obj)
+{
+    json ary;
+    JsonReserveArray(ary, value.size());
+    for (auto& s : value) {
+        JsonPushBack(ary, JsonFromString(s.c_str()));
+    }
+    JsonAddMember(obj, key.c_str(), std::move(ary));
+}
+
+static bool ValueToJson(const Value& value, json* ret)
+{
+    json obj;
+#ifdef TINYGLTF_USE_RAPIDJSON
+    switch (value.Type()) {
+    case REAL_TYPE:
+        obj.SetDouble(value.Get<double>());
+        break;
+    case INT_TYPE:
+        obj.SetInt(value.Get<int>());
+        break;
+    case BOOL_TYPE:
+        obj.SetBool(value.Get<bool>());
+        break;
+    case STRING_TYPE:
+        obj.SetString(value.Get<std::string>().c_str(), GetAllocator());
+        break;
+    case ARRAY_TYPE: {
+        obj.SetArray();
+        obj.Reserve(static_cast<rapidjson::SizeType>(value.ArrayLen()),
+                    GetAllocator());
+        for (unsigned int i = 0; i < value.ArrayLen(); ++i) {
+            Value elementValue = value.Get(int(i));
+            json elementJson;
+            if (ValueToJson(value.Get(int(i)), &elementJson))
+                obj.PushBack(std::move(elementJson), GetAllocator());
+        }
+        break;
+    }
+    case BINARY_TYPE:
+        // TODO
+        // obj = json(value.Get<std::vector<unsigned char>>());
+        return false;
+        break;
+    case OBJECT_TYPE: {
+        obj.SetObject();
+        Value::Object objMap = value.Get<Value::Object>();
+        for (auto& it : objMap) {
+            json elementJson;
+            if (ValueToJson(it.second, &elementJson)) {
+                obj.AddMember(json(it.first.c_str(), GetAllocator()),
+                              std::move(elementJson), GetAllocator());
+            }
+        }
+        break;
+    }
+    case NULL_TYPE:
+    default:
+        return false;
+    }
+#else
+    switch (value.Type()) {
+    case REAL_TYPE:
+        obj = json(value.Get<double>());
+        break;
+    case INT_TYPE:
+        obj = json(value.Get<int>());
+        break;
+    case BOOL_TYPE:
+        obj = json(value.Get<bool>());
+        break;
+    case STRING_TYPE:
+        obj = json(value.Get<std::string>());
+        break;
+    case ARRAY_TYPE: {
+        for (unsigned int i = 0; i < value.ArrayLen(); ++i) {
+            Value elementValue = value.Get(int(i));
+            json elementJson;
+            if (ValueToJson(value.Get(int(i)), &elementJson))
+                obj.push_back(elementJson);
+        }
+        break;
+    }
+    case BINARY_TYPE:
+        // TODO
+        // obj = json(value.Get<std::vector<unsigned char>>());
+        return false;
+        break;
+    case OBJECT_TYPE: {
+        Value::Object objMap = value.Get<Value::Object>();
+        for (auto& it : objMap) {
+            json elementJson;
+            if (ValueToJson(it.second, &elementJson))
+                obj[it.first] = elementJson;
+        }
+        break;
+    }
+    case NULL_TYPE:
+    default:
+        return false;
+    }
+#endif
+    if (ret)
+        *ret = std::move(obj);
+    return true;
+}
+
+static void SerializeValue(const std::string& key, const Value& value,
+                           json& obj)
+{
+    json ret;
+    if (ValueToJson(value, &ret)) {
+        JsonAddMember(obj, key.c_str(), std::move(ret));
+    }
+}
+
+static void SerializeGltfBufferData(const std::vector<unsigned char>& data,
+                                    json& o)
+{
+    std::string header = "data:application/octet-stream;base64,";
+    if (data.size() > 0) {
+        std::string encodedData =
+            base64_encode(&data[0], static_cast<unsigned int>(data.size()));
+        SerializeStringProperty("uri", header + encodedData, o);
+    }
+    else {
+        // Issue #229
+        // size 0 is allowed. Just emit mime header.
+        SerializeStringProperty("uri", header, o);
+    }
+}
+
+static bool SerializeGltfBufferData(const std::vector<unsigned char>& data,
+                                    const std::string& binFilename)
+{
+#ifdef _WIN32
+#if defined(__GLIBCXX__) // mingw
+    int file_descriptor = _wopen(UTF8ToWchar(binFilename).c_str(),
+                                 _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY);
+    __gnu_cxx::stdio_filebuf<char> wfile_buf(
+        file_descriptor, std::ios_base::out | std::ios_base::binary);
+    std::ostream output(&wfile_buf);
+    if (!wfile_buf.is_open())
+        return false;
+#elif defined(_MSC_VER)
+    std::ofstream output(UTF8ToWchar(binFilename).c_str(),
+                         std::ofstream::binary);
+    if (!output.is_open())
+        return false;
+#else
+    std::ofstream output(binFilename.c_str(), std::ofstream::binary);
+    if (!output.is_open())
+        return false;
+#endif
+#else
+    std::ofstream output(binFilename.c_str(), std::ofstream::binary);
+    if (!output.is_open())
+        return false;
+#endif
+    if (data.size() > 0) {
+        output.write(reinterpret_cast<const char*>(&data[0]),
+                     std::streamsize(data.size()));
+    }
+    else {
+        // Issue #229
+        // size 0 will be still valid buffer data.
+        // write empty file.
+    }
+    return true;
+}
+
+#if 0 // FIXME(syoyo): not used. will be removed in the future release.
+static void SerializeParameterMap(ParameterMap &param, json &o) {
+  for (ParameterMap::iterator paramIt = param.begin(); paramIt != param.end();
+       ++paramIt) {
+    if (paramIt->second.number_array.size()) {
+      SerializeNumberArrayProperty<double>(paramIt->first,
+                                           paramIt->second.number_array, o);
+    } else if (paramIt->second.json_double_value.size()) {
+      json json_double_value;
+      for (std::map<std::string, double>::iterator it =
+               paramIt->second.json_double_value.begin();
+           it != paramIt->second.json_double_value.end(); ++it) {
+        if (it->first == "index") {
+          json_double_value[it->first] = paramIt->second.TextureIndex();
+        } else {
+          json_double_value[it->first] = it->second;
+        }
+      }
+
+      o[paramIt->first] = json_double_value;
+    } else if (!paramIt->second.string_value.empty()) {
+      SerializeStringProperty(paramIt->first, paramIt->second.string_value, o);
+    } else if (paramIt->second.has_number_value) {
+      o[paramIt->first] = paramIt->second.number_value;
+    } else {
+      o[paramIt->first] = paramIt->second.bool_value;
+    }
+  }
+}
+#endif
+
+static void SerializeExtensionMap(const ExtensionMap& extensions, json& o)
+{
+    if (!extensions.size())
+        return;
+
+    json extMap;
+    for (ExtensionMap::const_iterator extIt = extensions.begin();
+         extIt != extensions.end(); ++extIt) {
+        // Allow an empty object for extension(#97)
+        json ret;
+        bool isNull = true;
+        if (ValueToJson(extIt->second, &ret)) {
+            isNull = JsonIsNull(ret);
+            JsonAddMember(extMap, extIt->first.c_str(), std::move(ret));
+        }
+        if (isNull) {
+            if (!(extIt->first
+                      .empty())) { // name should not be empty, but for sure
+                // create empty object so that an extension name is still
+                // included in json.
+                json empty;
+                JsonSetObject(empty);
+                JsonAddMember(extMap, extIt->first.c_str(), std::move(empty));
+            }
+        }
+    }
+    JsonAddMember(o, "extensions", std::move(extMap));
+}
+
+static void SerializeGltfAccessor(Accessor& accessor, json& o)
+{
+    if (accessor.bufferView >= 0)
+        SerializeNumberProperty<int>("bufferView", accessor.bufferView, o);
+
+    if (accessor.byteOffset != 0)
+        SerializeNumberProperty<int>("byteOffset", int(accessor.byteOffset), o);
+
+    SerializeNumberProperty<int>("componentType", accessor.componentType, o);
+    SerializeNumberProperty<size_t>("count", accessor.count, o);
+
+    if ((accessor.componentType == TINYGLTF_COMPONENT_TYPE_FLOAT) ||
+        (accessor.componentType == TINYGLTF_COMPONENT_TYPE_DOUBLE)) {
+        SerializeNumberArrayProperty<double>("min", accessor.minValues, o);
+        SerializeNumberArrayProperty<double>("max", accessor.maxValues, o);
+    }
+    else {
+        // Issue #301. Serialize as integer.
+        // Assume int value is within [-2**31-1, 2**31-1]
+        {
+            std::vector<int> values;
+            std::transform(accessor.minValues.begin(), accessor.minValues.end(),
+                           std::back_inserter(values),
+                           [](double v) { return static_cast<int>(v); });
+
+            SerializeNumberArrayProperty<int>("min", values, o);
+        }
+
+        {
+            std::vector<int> values;
+            std::transform(accessor.maxValues.begin(), accessor.maxValues.end(),
+                           std::back_inserter(values),
+                           [](double v) { return static_cast<int>(v); });
+
+            SerializeNumberArrayProperty<int>("max", values, o);
+        }
+    }
+
+    if (accessor.normalized)
+        SerializeValue("normalized", Value(accessor.normalized), o);
+    std::string type;
+    switch (accessor.type) {
+    case TINYGLTF_TYPE_SCALAR:
+        type = "SCALAR";
+        break;
+    case TINYGLTF_TYPE_VEC2:
+        type = "VEC2";
+        break;
+    case TINYGLTF_TYPE_VEC3:
+        type = "VEC3";
+        break;
+    case TINYGLTF_TYPE_VEC4:
+        type = "VEC4";
+        break;
+    case TINYGLTF_TYPE_MAT2:
+        type = "MAT2";
+        break;
+    case TINYGLTF_TYPE_MAT3:
+        type = "MAT3";
+        break;
+    case TINYGLTF_TYPE_MAT4:
+        type = "MAT4";
+        break;
+    }
+
+    SerializeStringProperty("type", type, o);
+    if (!accessor.name.empty())
+        SerializeStringProperty("name", accessor.name, o);
+
+    if (accessor.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", accessor.extras, o);
+    }
+
+    // sparse
+    if (accessor.sparse.isSparse) {
+        json sparse;
+        SerializeNumberProperty<int>("count", accessor.sparse.count, sparse);
+        {
+            json indices;
+            SerializeNumberProperty<int>(
+                "bufferView", accessor.sparse.indices.bufferView, indices);
+            SerializeNumberProperty<int>(
+                "byteOffset", accessor.sparse.indices.byteOffset, indices);
+            SerializeNumberProperty<int>("componentType",
+                                         accessor.sparse.indices.componentType,
+                                         indices);
+            JsonAddMember(sparse, "indices", std::move(indices));
+        }
+        {
+            json values;
+            SerializeNumberProperty<int>(
+                "bufferView", accessor.sparse.values.bufferView, values);
+            SerializeNumberProperty<int>(
+                "byteOffset", accessor.sparse.values.byteOffset, values);
+            JsonAddMember(sparse, "values", std::move(values));
+        }
+        JsonAddMember(o, "sparse", std::move(sparse));
+    }
+}
+
+static void SerializeGltfAnimationChannel(AnimationChannel& channel, json& o)
+{
+    SerializeNumberProperty("sampler", channel.sampler, o);
+    {
+        json target;
+        SerializeNumberProperty("node", channel.target_node, target);
+        SerializeStringProperty("path", channel.target_path, target);
+
+        SerializeExtensionMap(channel.target_extensions, target);
+
+        JsonAddMember(o, "target", std::move(target));
+    }
+
+    if (channel.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", channel.extras, o);
+    }
+
+    SerializeExtensionMap(channel.extensions, o);
+}
+
+static void SerializeGltfAnimationSampler(AnimationSampler& sampler, json& o)
+{
+    SerializeNumberProperty("input", sampler.input, o);
+    SerializeNumberProperty("output", sampler.output, o);
+    SerializeStringProperty("interpolation", sampler.interpolation, o);
+
+    if (sampler.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", sampler.extras, o);
+    }
+}
+
+static void SerializeGltfAnimation(Animation& animation, json& o)
+{
+    if (!animation.name.empty())
+        SerializeStringProperty("name", animation.name, o);
+
+    {
+        json channels;
+        JsonReserveArray(channels, animation.channels.size());
+        for (unsigned int i = 0; i < animation.channels.size(); ++i) {
+            json channel;
+            AnimationChannel gltfChannel = animation.channels[i];
+            SerializeGltfAnimationChannel(gltfChannel, channel);
+            JsonPushBack(channels, std::move(channel));
+        }
+
+        JsonAddMember(o, "channels", std::move(channels));
+    }
+
+    {
+        json samplers;
+        JsonReserveArray(samplers, animation.samplers.size());
+        for (unsigned int i = 0; i < animation.samplers.size(); ++i) {
+            json sampler;
+            AnimationSampler gltfSampler = animation.samplers[i];
+            SerializeGltfAnimationSampler(gltfSampler, sampler);
+            JsonPushBack(samplers, std::move(sampler));
+        }
+        JsonAddMember(o, "samplers", std::move(samplers));
+    }
+
+    if (animation.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", animation.extras, o);
+    }
+
+    SerializeExtensionMap(animation.extensions, o);
+}
+
+static void SerializeGltfAsset(Asset& asset, json& o)
+{
+    if (!asset.generator.empty()) {
+        SerializeStringProperty("generator", asset.generator, o);
+    }
+
+    if (!asset.copyright.empty()) {
+        SerializeStringProperty("copyright", asset.copyright, o);
+    }
+
+    if (asset.version.empty()) {
+        // Just in case
+        // `version` must be defined
+        asset.version = "2.0";
+    }
+
+    // TODO(syoyo): Do we need to check if `version` is greater or equal to 2.0?
+    SerializeStringProperty("version", asset.version, o);
+
+    if (asset.extras.Keys().size()) {
+        SerializeValue("extras", asset.extras, o);
+    }
+
+    SerializeExtensionMap(asset.extensions, o);
+}
+
+static void SerializeGltfBufferBin(Buffer& buffer, json& o,
+                                   std::vector<unsigned char>& binBuffer)
+{
+    SerializeNumberProperty("byteLength", buffer.data.size(), o);
+    binBuffer = buffer.data;
+
+    if (buffer.name.size())
+        SerializeStringProperty("name", buffer.name, o);
+
+    if (buffer.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", buffer.extras, o);
+    }
+}
+
+static void SerializeGltfBuffer(Buffer& buffer, json& o)
+{
+    SerializeNumberProperty("byteLength", buffer.data.size(), o);
+    SerializeGltfBufferData(buffer.data, o);
+
+    if (buffer.name.size())
+        SerializeStringProperty("name", buffer.name, o);
+
+    if (buffer.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", buffer.extras, o);
+    }
+}
+
+static bool SerializeGltfBuffer(Buffer& buffer, json& o,
+                                const std::string& binFilename,
+                                const std::string& binBaseFilename)
+{
+    if (!SerializeGltfBufferData(buffer.data, binFilename))
+        return false;
+    SerializeNumberProperty("byteLength", buffer.data.size(), o);
+    SerializeStringProperty("uri", binBaseFilename, o);
+
+    if (buffer.name.size())
+        SerializeStringProperty("name", buffer.name, o);
+
+    if (buffer.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", buffer.extras, o);
+    }
+    return true;
+}
+
+static void SerializeGltfBufferView(BufferView& bufferView, json& o)
+{
+    SerializeNumberProperty("buffer", bufferView.buffer, o);
+    SerializeNumberProperty<size_t>("byteLength", bufferView.byteLength, o);
+
+    // byteStride is optional, minimum allowed is 4
+    if (bufferView.byteStride >= 4) {
+        SerializeNumberProperty<size_t>("byteStride", bufferView.byteStride, o);
+    }
+    // byteOffset is optional, default is 0
+    if (bufferView.byteOffset > 0) {
+        SerializeNumberProperty<size_t>("byteOffset", bufferView.byteOffset, o);
+    }
+    // Target is optional, check if it contains a valid value
+    if (bufferView.target == TINYGLTF_TARGET_ARRAY_BUFFER ||
+        bufferView.target == TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER) {
+        SerializeNumberProperty("target", bufferView.target, o);
+    }
+    if (bufferView.name.size()) {
+        SerializeStringProperty("name", bufferView.name, o);
+    }
+
+    if (bufferView.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", bufferView.extras, o);
+    }
+}
+
+static void SerializeGltfImage(Image& image, json& o)
+{
+    // if uri empty, the mimeType and bufferview should be set
+    if (image.uri.empty()) {
+        SerializeStringProperty("mimeType", image.mimeType, o);
+        SerializeNumberProperty<int>("bufferView", image.bufferView, o);
+    }
+    else {
+        // TODO(syoyo): dlib::urilencode?
+        SerializeStringProperty("uri", image.uri, o);
+    }
+
+    if (image.name.size()) {
+        SerializeStringProperty("name", image.name, o);
+    }
+
+    if (image.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", image.extras, o);
+    }
+
+    SerializeExtensionMap(image.extensions, o);
+}
+
+static void SerializeGltfTextureInfo(TextureInfo& texinfo, json& o)
+{
+    SerializeNumberProperty("index", texinfo.index, o);
+
+    if (texinfo.texCoord != 0) {
+        SerializeNumberProperty("texCoord", texinfo.texCoord, o);
+    }
+
+    if (texinfo.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", texinfo.extras, o);
+    }
+
+    SerializeExtensionMap(texinfo.extensions, o);
+}
+
+static void SerializeGltfNormalTextureInfo(NormalTextureInfo& texinfo, json& o)
+{
+    SerializeNumberProperty("index", texinfo.index, o);
+
+    if (texinfo.texCoord != 0) {
+        SerializeNumberProperty("texCoord", texinfo.texCoord, o);
+    }
+
+    if (!TINYGLTF_DOUBLE_EQUAL(texinfo.scale, 1.0)) {
+        SerializeNumberProperty("scale", texinfo.scale, o);
+    }
+
+    if (texinfo.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", texinfo.extras, o);
+    }
+
+    SerializeExtensionMap(texinfo.extensions, o);
+}
+
+static void SerializeGltfOcclusionTextureInfo(OcclusionTextureInfo& texinfo,
+                                              json& o)
+{
+    SerializeNumberProperty("index", texinfo.index, o);
+
+    if (texinfo.texCoord != 0) {
+        SerializeNumberProperty("texCoord", texinfo.texCoord, o);
+    }
+
+    if (!TINYGLTF_DOUBLE_EQUAL(texinfo.strength, 1.0)) {
+        SerializeNumberProperty("strength", texinfo.strength, o);
+    }
+
+    if (texinfo.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", texinfo.extras, o);
+    }
+
+    SerializeExtensionMap(texinfo.extensions, o);
+}
+
+static void SerializeGltfPbrMetallicRoughness(PbrMetallicRoughness& pbr,
+                                              json& o)
+{
+    std::vector<double> default_baseColorFactor = {1.0, 1.0, 1.0, 1.0};
+    if (!Equals(pbr.baseColorFactor, default_baseColorFactor)) {
+        SerializeNumberArrayProperty<double>("baseColorFactor",
+                                             pbr.baseColorFactor, o);
+    }
+
+    if (!TINYGLTF_DOUBLE_EQUAL(pbr.metallicFactor, 1.0)) {
+        SerializeNumberProperty("metallicFactor", pbr.metallicFactor, o);
+    }
+
+    if (!TINYGLTF_DOUBLE_EQUAL(pbr.roughnessFactor, 1.0)) {
+        SerializeNumberProperty("roughnessFactor", pbr.roughnessFactor, o);
+    }
+
+    if (pbr.baseColorTexture.index > -1) {
+        json texinfo;
+        SerializeGltfTextureInfo(pbr.baseColorTexture, texinfo);
+        JsonAddMember(o, "baseColorTexture", std::move(texinfo));
+    }
+
+    if (pbr.metallicRoughnessTexture.index > -1) {
+        json texinfo;
+        SerializeGltfTextureInfo(pbr.metallicRoughnessTexture, texinfo);
+        JsonAddMember(o, "metallicRoughnessTexture", std::move(texinfo));
+    }
+
+    SerializeExtensionMap(pbr.extensions, o);
+
+    if (pbr.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", pbr.extras, o);
+    }
+}
+
+static void SerializeGltfMaterial(Material& material, json& o)
+{
+    if (material.name.size()) {
+        SerializeStringProperty("name", material.name, o);
+    }
+
+    // QUESTION(syoyo): Write material parameters regardless of its default
+    // value?
+
+    if (!TINYGLTF_DOUBLE_EQUAL(material.alphaCutoff, 0.5)) {
+        SerializeNumberProperty("alphaCutoff", material.alphaCutoff, o);
+    }
+
+    if (material.alphaMode.compare("OPAQUE") != 0) {
+        SerializeStringProperty("alphaMode", material.alphaMode, o);
+    }
+
+    if (material.doubleSided != false)
+        JsonAddMember(o, "doubleSided", json(material.doubleSided));
+
+    if (material.normalTexture.index > -1) {
+        json texinfo;
+        SerializeGltfNormalTextureInfo(material.normalTexture, texinfo);
+        JsonAddMember(o, "normalTexture", std::move(texinfo));
+    }
+
+    if (material.occlusionTexture.index > -1) {
+        json texinfo;
+        SerializeGltfOcclusionTextureInfo(material.occlusionTexture, texinfo);
+        JsonAddMember(o, "occlusionTexture", std::move(texinfo));
+    }
+
+    if (material.emissiveTexture.index > -1) {
+        json texinfo;
+        SerializeGltfTextureInfo(material.emissiveTexture, texinfo);
+        JsonAddMember(o, "emissiveTexture", std::move(texinfo));
+    }
+
+    std::vector<double> default_emissiveFactor = {0.0, 0.0, 0.0};
+    if (!Equals(material.emissiveFactor, default_emissiveFactor)) {
+        SerializeNumberArrayProperty<double>("emissiveFactor",
+                                             material.emissiveFactor, o);
+    }
+
+    {
+        json pbrMetallicRoughness;
+        SerializeGltfPbrMetallicRoughness(material.pbrMetallicRoughness,
+                                          pbrMetallicRoughness);
+        // Issue 204
+        // Do not serialize `pbrMetallicRoughness` if pbrMetallicRoughness has
+        // all default values(json is null). Otherwise it will serialize to
+        // `pbrMetallicRoughness : null`, which cannot be read by other glTF
+        // importers (and validators).
+        //
+        if (!JsonIsNull(pbrMetallicRoughness)) {
+            JsonAddMember(o, "pbrMetallicRoughness",
+                          std::move(pbrMetallicRoughness));
+        }
+    }
+
+#if 0 // legacy way. just for the record.
+  if (material.values.size()) {
+    json pbrMetallicRoughness;
+    SerializeParameterMap(material.values, pbrMetallicRoughness);
+    JsonAddMember(o, "pbrMetallicRoughness", std::move(pbrMetallicRoughness));
+  }
+
+  SerializeParameterMap(material.additionalValues, o);
+#else
+
+#endif
+
+    SerializeExtensionMap(material.extensions, o);
+
+    if (material.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", material.extras, o);
+    }
+}
+
+static void SerializeGltfMesh(Mesh& mesh, json& o)
+{
+    json primitives;
+    JsonReserveArray(primitives, mesh.primitives.size());
+    for (unsigned int i = 0; i < mesh.primitives.size(); ++i) {
+        json primitive;
+        const Primitive& gltfPrimitive =
+            mesh.primitives[i]; // don't make a copy
+        {
+            json attributes;
+            for (auto attrIt = gltfPrimitive.attributes.begin();
+                 attrIt != gltfPrimitive.attributes.end(); ++attrIt) {
+                SerializeNumberProperty<int>(attrIt->first, attrIt->second,
+                                             attributes);
+            }
+
+            JsonAddMember(primitive, "attributes", std::move(attributes));
+        }
+
+        // Indices is optional
+        if (gltfPrimitive.indices > -1) {
+            SerializeNumberProperty<int>("indices", gltfPrimitive.indices,
+                                         primitive);
+        }
+        // Material is optional
+        if (gltfPrimitive.material > -1) {
+            SerializeNumberProperty<int>("material", gltfPrimitive.material,
+                                         primitive);
+        }
+        SerializeNumberProperty<int>("mode", gltfPrimitive.mode, primitive);
+
+        // Morph targets
+        if (gltfPrimitive.targets.size()) {
+            json targets;
+            JsonReserveArray(targets, gltfPrimitive.targets.size());
+            for (unsigned int k = 0; k < gltfPrimitive.targets.size(); ++k) {
+                json targetAttributes;
+                std::map<std::string, int> targetData =
+                    gltfPrimitive.targets[k];
+                for (std::map<std::string, int>::iterator attrIt =
+                         targetData.begin();
+                     attrIt != targetData.end(); ++attrIt) {
+                    SerializeNumberProperty<int>(attrIt->first, attrIt->second,
+                                                 targetAttributes);
+                }
+                JsonPushBack(targets, std::move(targetAttributes));
+            }
+            JsonAddMember(primitive, "targets", std::move(targets));
+        }
+
+        SerializeExtensionMap(gltfPrimitive.extensions, primitive);
+
+        if (gltfPrimitive.extras.Type() != NULL_TYPE) {
+            SerializeValue("extras", gltfPrimitive.extras, primitive);
+        }
+
+        JsonPushBack(primitives, std::move(primitive));
+    }
+
+    JsonAddMember(o, "primitives", std::move(primitives));
+
+    if (mesh.weights.size()) {
+        SerializeNumberArrayProperty<double>("weights", mesh.weights, o);
+    }
+
+    if (mesh.name.size()) {
+        SerializeStringProperty("name", mesh.name, o);
+    }
+
+    SerializeExtensionMap(mesh.extensions, o);
+    if (mesh.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", mesh.extras, o);
+    }
+}
+
+static void SerializeSpotLight(SpotLight& spot, json& o)
+{
+    SerializeNumberProperty("innerConeAngle", spot.innerConeAngle, o);
+    SerializeNumberProperty("outerConeAngle", spot.outerConeAngle, o);
+    SerializeExtensionMap(spot.extensions, o);
+    if (spot.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", spot.extras, o);
+    }
+}
+
+static void SerializeGltfLight(Light& light, json& o)
+{
+    if (!light.name.empty())
+        SerializeStringProperty("name", light.name, o);
+    SerializeNumberProperty("intensity", light.intensity, o);
+    if (light.range > 0.0) {
+        SerializeNumberProperty("range", light.range, o);
+    }
+    SerializeNumberArrayProperty("color", light.color, o);
+    SerializeStringProperty("type", light.type, o);
+    if (light.type == "spot") {
+        json spot;
+        SerializeSpotLight(light.spot, spot);
+        JsonAddMember(o, "spot", std::move(spot));
+    }
+    SerializeExtensionMap(light.extensions, o);
+    if (light.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", light.extras, o);
+    }
+}
+
+static void SerializeGltfNode(Node& node, json& o)
+{
+    if (node.translation.size() > 0) {
+        SerializeNumberArrayProperty<double>("translation", node.translation,
+                                             o);
+    }
+    if (node.rotation.size() > 0) {
+        SerializeNumberArrayProperty<double>("rotation", node.rotation, o);
+    }
+    if (node.scale.size() > 0) {
+        SerializeNumberArrayProperty<double>("scale", node.scale, o);
+    }
+    if (node.matrix.size() > 0) {
+        SerializeNumberArrayProperty<double>("matrix", node.matrix, o);
+    }
+    if (node.mesh != -1) {
+        SerializeNumberProperty<int>("mesh", node.mesh, o);
+    }
+
+    if (node.skin != -1) {
+        SerializeNumberProperty<int>("skin", node.skin, o);
+    }
+
+    if (node.camera != -1) {
+        SerializeNumberProperty<int>("camera", node.camera, o);
+    }
+
+    if (node.weights.size() > 0) {
+        SerializeNumberArrayProperty<double>("weights", node.weights, o);
+    }
+
+    if (node.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", node.extras, o);
+    }
+
+    SerializeExtensionMap(node.extensions, o);
+    if (!node.name.empty())
+        SerializeStringProperty("name", node.name, o);
+    SerializeNumberArrayProperty<int>("children", node.children, o);
+}
+
+static void SerializeGltfSampler(Sampler& sampler, json& o)
+{
+    if (sampler.magFilter != -1) {
+        SerializeNumberProperty("magFilter", sampler.magFilter, o);
+    }
+    if (sampler.minFilter != -1) {
+        SerializeNumberProperty("minFilter", sampler.minFilter, o);
+    }
+    // SerializeNumberProperty("wrapR", sampler.wrapR, o);
+    SerializeNumberProperty("wrapS", sampler.wrapS, o);
+    SerializeNumberProperty("wrapT", sampler.wrapT, o);
+
+    if (sampler.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", sampler.extras, o);
+    }
+}
+
+static void SerializeGltfOrthographicCamera(const OrthographicCamera& camera,
+                                            json& o)
+{
+    SerializeNumberProperty("zfar", camera.zfar, o);
+    SerializeNumberProperty("znear", camera.znear, o);
+    SerializeNumberProperty("xmag", camera.xmag, o);
+    SerializeNumberProperty("ymag", camera.ymag, o);
+
+    if (camera.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", camera.extras, o);
+    }
+}
+
+static void SerializeGltfPerspectiveCamera(const PerspectiveCamera& camera,
+                                           json& o)
+{
+    SerializeNumberProperty("zfar", camera.zfar, o);
+    SerializeNumberProperty("znear", camera.znear, o);
+    if (camera.aspectRatio > 0) {
+        SerializeNumberProperty("aspectRatio", camera.aspectRatio, o);
+    }
+
+    if (camera.yfov > 0) {
+        SerializeNumberProperty("yfov", camera.yfov, o);
+    }
+
+    if (camera.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", camera.extras, o);
+    }
+}
+
+static void SerializeGltfCamera(const Camera& camera, json& o)
+{
+    SerializeStringProperty("type", camera.type, o);
+    if (!camera.name.empty()) {
+        SerializeStringProperty("name", camera.name, o);
+    }
+
+    if (camera.type.compare("orthographic") == 0) {
+        json orthographic;
+        SerializeGltfOrthographicCamera(camera.orthographic, orthographic);
+        JsonAddMember(o, "orthographic", std::move(orthographic));
+    }
+    else if (camera.type.compare("perspective") == 0) {
+        json perspective;
+        SerializeGltfPerspectiveCamera(camera.perspective, perspective);
+        JsonAddMember(o, "perspective", std::move(perspective));
+    }
+    else {
+        // ???
+    }
+
+    if (camera.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", camera.extras, o);
+    }
+    SerializeExtensionMap(camera.extensions, o);
+}
+
+static void SerializeGltfScene(Scene& scene, json& o)
+{
+    SerializeNumberArrayProperty<int>("nodes", scene.nodes, o);
+
+    if (scene.name.size()) {
+        SerializeStringProperty("name", scene.name, o);
+    }
+    if (scene.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", scene.extras, o);
+    }
+    SerializeExtensionMap(scene.extensions, o);
+}
+
+static void SerializeGltfSkin(Skin& skin, json& o)
+{
+    // required
+    SerializeNumberArrayProperty<int>("joints", skin.joints, o);
+
+    if (skin.inverseBindMatrices >= 0) {
+        SerializeNumberProperty("inverseBindMatrices", skin.inverseBindMatrices,
+                                o);
+    }
+
+    if (skin.skeleton >= 0) {
+        SerializeNumberProperty("skeleton", skin.skeleton, o);
+    }
+
+    if (skin.name.size()) {
+        SerializeStringProperty("name", skin.name, o);
+    }
+}
+
+static void SerializeGltfTexture(Texture& texture, json& o)
+{
+    if (texture.sampler > -1) {
+        SerializeNumberProperty("sampler", texture.sampler, o);
+    }
+    if (texture.source > -1) {
+        SerializeNumberProperty("source", texture.source, o);
+    }
+    if (texture.name.size()) {
+        SerializeStringProperty("name", texture.name, o);
+    }
+    if (texture.extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", texture.extras, o);
+    }
+    SerializeExtensionMap(texture.extensions, o);
+}
+
+///
+/// Serialize all properties except buffers and images.
+///
+static void SerializeGltfModel(Model* model, json& o)
+{
+    // ACCESSORS
+    if (model->accessors.size()) {
+        json accessors;
+        JsonReserveArray(accessors, model->accessors.size());
+        for (unsigned int i = 0; i < model->accessors.size(); ++i) {
+            json accessor;
+            SerializeGltfAccessor(model->accessors[i], accessor);
+            JsonPushBack(accessors, std::move(accessor));
+        }
+        JsonAddMember(o, "accessors", std::move(accessors));
+    }
+
+    // ANIMATIONS
+    if (model->animations.size()) {
+        json animations;
+        JsonReserveArray(animations, model->animations.size());
+        for (unsigned int i = 0; i < model->animations.size(); ++i) {
+            if (model->animations[i].channels.size()) {
+                json animation;
+                SerializeGltfAnimation(model->animations[i], animation);
+                JsonPushBack(animations, std::move(animation));
+            }
+        }
+
+        JsonAddMember(o, "animations", std::move(animations));
+    }
+
+    // ASSET
+    json asset;
+    SerializeGltfAsset(model->asset, asset);
+    JsonAddMember(o, "asset", std::move(asset));
+
+    // BUFFERVIEWS
+    if (model->bufferViews.size()) {
+        json bufferViews;
+        JsonReserveArray(bufferViews, model->bufferViews.size());
+        for (unsigned int i = 0; i < model->bufferViews.size(); ++i) {
+            json bufferView;
+            SerializeGltfBufferView(model->bufferViews[i], bufferView);
+            JsonPushBack(bufferViews, std::move(bufferView));
+        }
+        JsonAddMember(o, "bufferViews", std::move(bufferViews));
+    }
+
+    // Extensions required
+    if (model->extensionsRequired.size()) {
+        SerializeStringArrayProperty("extensionsRequired",
+                                     model->extensionsRequired, o);
+    }
+
+    // MATERIALS
+    if (model->materials.size()) {
+        json materials;
+        JsonReserveArray(materials, model->materials.size());
+        for (unsigned int i = 0; i < model->materials.size(); ++i) {
+            json material;
+            SerializeGltfMaterial(model->materials[i], material);
+
+            if (JsonIsNull(material)) {
+                // Issue 294.
+                // `material` does not have any required parameters
+                // so the result may be null(unmodified) when all material
+                // parameters have default value.
+                //
+                // null is not allowed thus we create an empty JSON object.
+                JsonSetObject(material);
+            }
+            JsonPushBack(materials, std::move(material));
+        }
+        JsonAddMember(o, "materials", std::move(materials));
+    }
+
+    // MESHES
+    if (model->meshes.size()) {
+        json meshes;
+        JsonReserveArray(meshes, model->meshes.size());
+        for (unsigned int i = 0; i < model->meshes.size(); ++i) {
+            json mesh;
+            SerializeGltfMesh(model->meshes[i], mesh);
+            JsonPushBack(meshes, std::move(mesh));
+        }
+        JsonAddMember(o, "meshes", std::move(meshes));
+    }
+
+    // NODES
+    if (model->nodes.size()) {
+        json nodes;
+        JsonReserveArray(nodes, model->nodes.size());
+        for (unsigned int i = 0; i < model->nodes.size(); ++i) {
+            json node;
+            SerializeGltfNode(model->nodes[i], node);
+            JsonPushBack(nodes, std::move(node));
+        }
+        JsonAddMember(o, "nodes", std::move(nodes));
+    }
+
+    // SCENE
+    if (model->defaultScene > -1) {
+        SerializeNumberProperty<int>("scene", model->defaultScene, o);
+    }
+
+    // SCENES
+    if (model->scenes.size()) {
+        json scenes;
+        JsonReserveArray(scenes, model->scenes.size());
+        for (unsigned int i = 0; i < model->scenes.size(); ++i) {
+            json currentScene;
+            SerializeGltfScene(model->scenes[i], currentScene);
+            JsonPushBack(scenes, std::move(currentScene));
+        }
+        JsonAddMember(o, "scenes", std::move(scenes));
+    }
+
+    // SKINS
+    if (model->skins.size()) {
+        json skins;
+        JsonReserveArray(skins, model->skins.size());
+        for (unsigned int i = 0; i < model->skins.size(); ++i) {
+            json skin;
+            SerializeGltfSkin(model->skins[i], skin);
+            JsonPushBack(skins, std::move(skin));
+        }
+        JsonAddMember(o, "skins", std::move(skins));
+    }
+
+    // TEXTURES
+    if (model->textures.size()) {
+        json textures;
+        JsonReserveArray(textures, model->textures.size());
+        for (unsigned int i = 0; i < model->textures.size(); ++i) {
+            json texture;
+            SerializeGltfTexture(model->textures[i], texture);
+            JsonPushBack(textures, std::move(texture));
+        }
+        JsonAddMember(o, "textures", std::move(textures));
+    }
+
+    // SAMPLERS
+    if (model->samplers.size()) {
+        json samplers;
+        JsonReserveArray(samplers, model->samplers.size());
+        for (unsigned int i = 0; i < model->samplers.size(); ++i) {
+            json sampler;
+            SerializeGltfSampler(model->samplers[i], sampler);
+            JsonPushBack(samplers, std::move(sampler));
+        }
+        JsonAddMember(o, "samplers", std::move(samplers));
+    }
+
+    // CAMERAS
+    if (model->cameras.size()) {
+        json cameras;
+        JsonReserveArray(cameras, model->cameras.size());
+        for (unsigned int i = 0; i < model->cameras.size(); ++i) {
+            json camera;
+            SerializeGltfCamera(model->cameras[i], camera);
+            JsonPushBack(cameras, std::move(camera));
+        }
+        JsonAddMember(o, "cameras", std::move(cameras));
+    }
+
+    // EXTENSIONS
+    SerializeExtensionMap(model->extensions, o);
+
+    auto extensionsUsed = model->extensionsUsed;
+
+    // LIGHTS as KHR_lights_punctual
+    if (model->lights.size()) {
+        json lights;
+        JsonReserveArray(lights, model->lights.size());
+        for (unsigned int i = 0; i < model->lights.size(); ++i) {
+            json light;
+            SerializeGltfLight(model->lights[i], light);
+            JsonPushBack(lights, std::move(light));
+        }
+        json khr_lights_cmn;
+        JsonAddMember(khr_lights_cmn, "lights", std::move(lights));
+        json ext_j;
+
+        {
+            json_const_iterator it;
+            if (FindMember(o, "extensions", it)) {
+                JsonAssign(ext_j, GetValue(it));
+            }
+        }
+
+        JsonAddMember(ext_j, "KHR_lights_punctual", std::move(khr_lights_cmn));
+
+        JsonAddMember(o, "extensions", std::move(ext_j));
+
+        // Also add "KHR_lights_punctual" to `extensionsUsed`
+        {
+            auto has_khr_lights_punctual =
+                std::find_if(extensionsUsed.begin(), extensionsUsed.end(),
+                             [](const std::string& s) {
+                                 return (s.compare("KHR_lights_punctual") == 0);
+                             });
+
+            if (has_khr_lights_punctual == extensionsUsed.end()) {
+                extensionsUsed.push_back("KHR_lights_punctual");
+            }
+        }
+    }
+
+    // Extensions used
+    if (extensionsUsed.size()) {
+        SerializeStringArrayProperty("extensionsUsed", extensionsUsed, o);
+    }
+
+    // EXTRAS
+    if (model->extras.Type() != NULL_TYPE) {
+        SerializeValue("extras", model->extras, o);
+    }
+}
+
+static bool WriteGltfStream(std::ostream& stream, const std::string& content)
+{
+    stream << content << std::endl;
+    return true;
+}
+
+static bool WriteGltfFile(const std::string& output, const std::string& content)
+{
+#ifdef _WIN32
+#if defined(_MSC_VER)
+    std::ofstream gltfFile(UTF8ToWchar(output).c_str());
+#elif defined(__GLIBCXX__)
+    int file_descriptor = _wopen(UTF8ToWchar(output).c_str(),
+                                 _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY);
+    __gnu_cxx::stdio_filebuf<char> wfile_buf(
+        file_descriptor, std::ios_base::out | std::ios_base::binary);
+    std::ostream gltfFile(&wfile_buf);
+    if (!wfile_buf.is_open())
+        return false;
+#else
+    std::ofstream gltfFile(output.c_str());
+    if (!gltfFile.is_open())
+        return false;
+#endif
+#else
+    std::ofstream gltfFile(output.c_str());
+    if (!gltfFile.is_open())
+        return false;
+#endif
+    return WriteGltfStream(gltfFile, content);
+}
+
+static bool WriteBinaryGltfStream(std::ostream& stream,
+                                  const std::string& content,
+                                  const std::vector<unsigned char>& binBuffer)
+{
+    const std::string header = "glTF";
+    const int version = 2;
+
+    const uint32_t content_size = uint32_t(content.size());
+    const uint32_t binBuffer_size = uint32_t(binBuffer.size());
+    // determine number of padding bytes required to ensure 4 byte alignment
+    const uint32_t content_padding_size =
+        content_size % 4 == 0 ? 0 : 4 - content_size % 4;
+    const uint32_t bin_padding_size =
+        binBuffer_size % 4 == 0 ? 0 : 4 - binBuffer_size % 4;
+
+    // 12 bytes for header, JSON content length, 8 bytes for JSON chunk info.
+    // Chunk data must be located at 4-byte boundary, which may require padding
+    const uint32_t length =
+        12 + 8 + content_size + content_padding_size +
+        (binBuffer_size ? (8 + binBuffer_size + bin_padding_size) : 0);
+
+    stream.write(header.c_str(), std::streamsize(header.size()));
+    stream.write(reinterpret_cast<const char*>(&version), sizeof(version));
+    stream.write(reinterpret_cast<const char*>(&length), sizeof(length));
+
+    // JSON chunk info, then JSON data
+    const uint32_t model_length =
+        uint32_t(content.size()) + content_padding_size;
+    const uint32_t model_format = 0x4E4F534A;
+    stream.write(reinterpret_cast<const char*>(&model_length),
+                 sizeof(model_length));
+    stream.write(reinterpret_cast<const char*>(&model_format),
+                 sizeof(model_format));
+    stream.write(content.c_str(), std::streamsize(content.size()));
+
+    // Chunk must be multiplies of 4, so pad with spaces
+    if (content_padding_size > 0) {
+        const std::string padding =
+            std::string(size_t(content_padding_size), ' ');
+        stream.write(padding.c_str(), std::streamsize(padding.size()));
+    }
+    if (binBuffer.size() > 0) {
+        // BIN chunk info, then BIN data
+        const uint32_t bin_length =
+            uint32_t(binBuffer.size()) + bin_padding_size;
+        const uint32_t bin_format = 0x004e4942;
+        stream.write(reinterpret_cast<const char*>(&bin_length),
+                     sizeof(bin_length));
+        stream.write(reinterpret_cast<const char*>(&bin_format),
+                     sizeof(bin_format));
+        stream.write(reinterpret_cast<const char*>(binBuffer.data()),
+                     std::streamsize(binBuffer.size()));
+        // Chunksize must be multiplies of 4, so pad with zeroes
+        if (bin_padding_size > 0) {
+            const std::vector<unsigned char> padding =
+                std::vector<unsigned char>(size_t(bin_padding_size), 0);
+            stream.write(reinterpret_cast<const char*>(padding.data()),
+                         std::streamsize(padding.size()));
+        }
+    }
+
+    // TODO: Check error on stream.write
+    return true;
+}
+
+static bool WriteBinaryGltfFile(const std::string& output,
+                                const std::string& content,
+                                const std::vector<unsigned char>& binBuffer)
+{
+#ifdef _WIN32
+#if defined(_MSC_VER)
+    std::ofstream gltfFile(UTF8ToWchar(output).c_str(), std::ios::binary);
+#elif defined(__GLIBCXX__)
+    int file_descriptor = _wopen(UTF8ToWchar(output).c_str(),
+                                 _O_CREAT | _O_WRONLY | _O_TRUNC | _O_BINARY);
+    __gnu_cxx::stdio_filebuf<char> wfile_buf(
+        file_descriptor, std::ios_base::out | std::ios_base::binary);
+    std::ostream gltfFile(&wfile_buf);
+#else
+    std::ofstream gltfFile(output.c_str(), std::ios::binary);
+#endif
+#else
+    std::ofstream gltfFile(output.c_str(), std::ios::binary);
+#endif
+    return WriteBinaryGltfStream(gltfFile, content, binBuffer);
+}
+
+bool TinyGLTF::WriteGltfSceneToStream(Model* model, std::ostream& stream,
+                                      bool prettyPrint = true,
+                                      bool writeBinary = false)
+{
+    JsonDocument output;
+
+    /// Serialize all properties except buffers and images.
+    SerializeGltfModel(model, output);
+
+    // BUFFERS
+    std::vector<unsigned char> binBuffer;
+    if (model->buffers.size()) {
+        json buffers;
+        JsonReserveArray(buffers, model->buffers.size());
+        for (unsigned int i = 0; i < model->buffers.size(); ++i) {
+            json buffer;
+            if (writeBinary && i == 0 && model->buffers[i].uri.empty()) {
+                SerializeGltfBufferBin(model->buffers[i], buffer, binBuffer);
+            }
+            else {
+                SerializeGltfBuffer(model->buffers[i], buffer);
+            }
+            JsonPushBack(buffers, std::move(buffer));
+        }
+        JsonAddMember(output, "buffers", std::move(buffers));
+    }
+
+    // IMAGES
+    if (model->images.size()) {
+        json images;
+        JsonReserveArray(images, model->images.size());
+        for (unsigned int i = 0; i < model->images.size(); ++i) {
+            json image;
+
+            std::string dummystring = "";
+            // UpdateImageObject need baseDir but only uses it if embeddedImages
+            // is enabled, since we won't write separate images when writing to
+            // a stream we
+            UpdateImageObject(model->images[i], dummystring, int(i), true,
+                              &this->WriteImageData,
+                              this->write_image_user_data_);
+            SerializeGltfImage(model->images[i], image);
+            JsonPushBack(images, std::move(image));
+        }
+        JsonAddMember(output, "images", std::move(images));
+    }
+
+    if (writeBinary) {
+        return WriteBinaryGltfStream(stream, JsonToString(output), binBuffer);
+    }
+    else {
+        return WriteGltfStream(stream,
+                               JsonToString(output, prettyPrint ? 2 : -1));
+    }
+}
+
+bool TinyGLTF::WriteGltfSceneToFile(Model* model, const std::string& filename,
+                                    bool embedImages = false,
+                                    bool embedBuffers = false,
+                                    bool prettyPrint = true,
+                                    bool writeBinary = false)
+{
+    JsonDocument output;
+    std::string defaultBinFilename = GetBaseFilename(filename);
+    std::string defaultBinFileExt = ".bin";
+    std::string::size_type pos =
+        defaultBinFilename.rfind('.', defaultBinFilename.length());
+
+    if (pos != std::string::npos) {
+        defaultBinFilename = defaultBinFilename.substr(0, pos);
+    }
+    std::string baseDir = GetBaseDir(filename);
+    if (baseDir.empty()) {
+        baseDir = "./";
+    }
+    /// Serialize all properties except buffers and images.
+    SerializeGltfModel(model, output);
+
+    // BUFFERS
+    std::vector<std::string> usedUris;
+    std::vector<unsigned char> binBuffer;
+    if (model->buffers.size()) {
+        json buffers;
+        JsonReserveArray(buffers, model->buffers.size());
+        for (unsigned int i = 0; i < model->buffers.size(); ++i) {
+            json buffer;
+            if (writeBinary && i == 0 && model->buffers[i].uri.empty()) {
+                SerializeGltfBufferBin(model->buffers[i], buffer, binBuffer);
+            }
+            else if (embedBuffers) {
+                SerializeGltfBuffer(model->buffers[i], buffer);
+            }
+            else {
+                std::string binSavePath;
+                std::string binUri;
+                if (!model->buffers[i].uri.empty() &&
+                    !IsDataURI(model->buffers[i].uri)) {
+                    binUri = model->buffers[i].uri;
+                }
+                else {
+                    binUri = defaultBinFilename + defaultBinFileExt;
+                    bool inUse = true;
+                    int numUsed = 0;
+                    while (inUse) {
+                        inUse = false;
+                        for (const std::string& usedName : usedUris) {
+                            if (binUri.compare(usedName) != 0)
+                                continue;
+                            inUse = true;
+                            binUri = defaultBinFilename +
+                                     std::to_string(numUsed++) +
+                                     defaultBinFileExt;
+                            break;
+                        }
+                    }
+                }
+                usedUris.push_back(binUri);
+                binSavePath = JoinPath(baseDir, binUri);
+                if (!SerializeGltfBuffer(model->buffers[i], buffer, binSavePath,
+                                         binUri)) {
+                    return false;
+                }
+            }
+            JsonPushBack(buffers, std::move(buffer));
+        }
+        JsonAddMember(output, "buffers", std::move(buffers));
+    }
+
+    // IMAGES
+    if (model->images.size()) {
+        json images;
+        JsonReserveArray(images, model->images.size());
+        for (unsigned int i = 0; i < model->images.size(); ++i) {
+            json image;
+
+            UpdateImageObject(model->images[i], baseDir, int(i), embedImages,
+                              &this->WriteImageData,
+                              this->write_image_user_data_);
+            SerializeGltfImage(model->images[i], image);
+            JsonPushBack(images, std::move(image));
+        }
+        JsonAddMember(output, "images", std::move(images));
+    }
+
+    if (writeBinary) {
+        return WriteBinaryGltfFile(filename, JsonToString(output), binBuffer);
+    }
+    else {
+        return WriteGltfFile(filename,
+                             JsonToString(output, (prettyPrint ? 2 : -1)));
+    }
+}
+
+} // namespace tinygltf
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+#endif // TINYGLTF_IMPLEMENTATION
\ No newline at end of file
diff --git a/src/viewer3d/iblsampler.cpp b/src/viewer3d/iblsampler.cpp
new file mode 100644
index 00000000..053a6df8
--- /dev/null
+++ b/src/viewer3d/iblsampler.cpp
@@ -0,0 +1,526 @@
+#include "iblsampler.h"
+#include "shadercache.h"
+#include <cmath>
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "gltf/stb_image.h"
+
+#include <QFile>
+#include <QOpenGLBuffer>
+#include <QOpenGLFramebufferObject>
+#include <QOpenGLFunctions>
+#include <QOpenGLShader>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLTexture>
+#include <QOpenGLVertexArrayObject>
+
+enum class VertexUsage : int {
+    Position = 0,
+    Color = 1,
+    TexCoord0 = 2,
+    TexCoord1 = 3,
+    TexCoord2 = 4,
+    TexCoord3 = 5,
+    Normal = 6,
+    Tangent = 7,
+    Count = 8
+};
+
+void createSampleCube(QOpenGLFunctions* gl)
+{
+    GLuint tex;
+    gl->glGenTextures(1, &tex);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
+
+    for (unsigned int i = 0; i < 6; ++i) {
+        gl->glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB16F, 256,
+                         256, 0, GL_RGB, GL_FLOAT, nullptr);
+    }
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S,
+                        GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T,
+                        GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R,
+                        GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER,
+                        GL_LINEAR_MIPMAP_LINEAR);
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    gl->glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+}
+
+IblSampler::IblSampler()
+{
+    shaderCache = new ShaderCache();
+    shaderCache->addShaderFile("fullscreen.vert", ":assets/fullscreen.vert");
+    shaderCache->addShaderFile("panorama_to_cubemap.frag",
+                               ":assets/panorama_to_cubemap.frag");
+    shaderCache->addShaderFile("ibl_filtering.frag",
+                               ":assets/ibl_filtering.frag");
+}
+
+void IblSampler::init(const QString& panoramaPath)
+{
+    // THIS SOLVES THE ISSUE CAUSING BANDING TO SHOW
+    // AROUND BRIGHT AREAS NEAR SEEMS IN LAMBERTIAN CUBEMAP!!!
+    gl->glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
+
+    mipmapLevels =
+        std::floor(std::log2(this->textureSize)) + 1 - this->lowestMipLevel;
+
+    framebuffer = new QOpenGLFramebufferObject(textureSize, textureSize);
+    if (!framebuffer->isValid()) {
+        qFatal("FBO could not be created");
+    }
+    // setup vbo
+    vao = new QOpenGLVertexArrayObject;
+    if (vao->create())
+        vao->bind();
+
+    // setup vertex array
+    QVector<float> data;
+    // TRIANGLE 1
+    data.append(-1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(0);
+    data.append(0);
+
+    data.append(1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(1);
+    data.append(0);
+
+    data.append(-1);
+    data.append(1);
+    data.append(0);
+
+    data.append(0);
+    data.append(1);
+
+    // TRIANGLE 2
+    data.append(-1);
+    data.append(1);
+    data.append(0);
+
+    data.append(0);
+    data.append(1);
+
+    data.append(1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(1);
+    data.append(0);
+
+    data.append(1);
+    data.append(1);
+    data.append(0);
+
+    data.append(1);
+    data.append(1);
+
+    vbo = new QOpenGLBuffer;
+    vbo->create();
+    vbo->bind();
+    vbo->allocate(data.constData(), data.count() * sizeof(float));
+    vbo->release();
+
+    this->loadPanorama(panoramaPath);
+
+    // createSampleCube(gl);
+
+    // cubemapTexture = this->createCubemap(true);
+    // lambertianTexture = this->createCubemap(false);
+    // ggxTexture = this->createCubemap(true);
+    // sheenTexture = this->createCubemap(true);
+
+    // ggxLutTexture = this->createLut();
+    // charlieLutTexture = this->createLut();
+
+    cubemapTextureID = this->createCubemap(true);
+    lambertianTextureID = this->createCubemap(false);
+    ggxTextureID = this->createCubemap(true);
+    sheenTextureID = this->createCubemap(true);
+
+    ggxLutTextureID = this->createLut();
+    charlieLutTextureID = this->createLut();
+
+    // ggxTexture->bind();
+    // ggxTexture->generateMipMaps(0);
+    // sheenTexture->bind();
+    // sheenTexture->generateMipMaps(0);
+    // sheenTexture->release();
+    // gl->glBindTexture(GL_TEXTURE_CUBE_MAP, ggxTexture->textureId());
+    // gl->glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+    // gl->glBindTexture(GL_TEXTURE_CUBE_MAP, sheenTexture->textureId());
+    // gl->glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+}
+
+void IblSampler::filterAll()
+{
+    this->panoramaToCubemap();
+    this->cubeMapToLambertian();
+    this->cubeMapToGGX();
+    this->cubeMapToSheen();
+
+    this->sampleGGXLut();
+    this->sampleCharlieLut();
+}
+
+// stbi_loadf_from_memory
+// https://stackoverflow.com/questions/32666824/qopengltexture-qt-from-raw-data-freeimage
+void IblSampler::loadPanorama(const QString& path)
+{
+    int width, height, numComponents;
+    QFile file(path);
+    file.open(QFile::ReadOnly);
+    auto byteArray = file.readAll();
+    auto textureData = stbi_loadf_from_memory(
+        (unsigned char*)byteArray.constData(), byteArray.length(), &width,
+        &height, &numComponents, 3);
+    QOpenGLTexture* text = new QOpenGLTexture(QOpenGLTexture::Target2D);
+    text->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear,
+                           QOpenGLTexture::Linear);
+    text->setWrapMode(QOpenGLTexture::MirroredRepeat);
+    text->create();
+
+    // given some `width`, `height` and `data_ptr`
+    text->setSize(width, height, 1);
+    text->setFormat(QOpenGLTexture::RGB32F);
+    text->allocateStorage();
+    text->setData(QOpenGLTexture::RGB, QOpenGLTexture::Float32, textureData);
+
+    inputTexture = text;
+}
+
+// https://stackoverflow.com/questions/50666781/create-cubemap-from-qopenglframebuffer
+
+// QOpenGLTexture* IblSampler::createCubemap(bool withMipmaps)
+// {
+//     auto cubemap = new QOpenGLTexture(QOpenGLTexture::TargetCubeMap);
+//     cubemap->create();
+
+//     if (withMipmaps)
+//         cubemap->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear,
+//                                   QOpenGLTexture::Linear);
+//     else
+//         cubemap->setMinMagFilters(QOpenGLTexture::Linear,
+//                                   QOpenGLTexture::Linear);
+
+//     cubemap->setWrapMode(QOpenGLTexture::ClampToEdge);
+//     cubemap->setSize(textureSize, textureSize, 1);
+
+//     // cubemap->setMipLevels()
+//     cubemap->setFormat(QOpenGLTexture::RGB16F);
+//     cubemap->allocateStorage();
+
+//     cubemap->generateMipMaps(0);
+//     // cubemap->bind();
+//     // gl->glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+//     // cubemap->release();
+//     // cubemap->setMipBaseLevel(0);
+//     // cubemap->setMipMaxLevel(11);
+
+//     return cubemap;
+// }
+
+// QOpenGLTexture* IblSampler::createLut()
+// {
+//     auto texture = new QOpenGLTexture(QOpenGLTexture::Target2D);
+//     texture->setMinMagFilters(QOpenGLTexture::Linear,
+//     QOpenGLTexture::Linear);
+//     texture->setWrapMode(QOpenGLTexture::ClampToEdge);
+//     texture->create();
+
+//     texture->setSize(textureSize, textureSize, 3);
+//     // cubemap->setMipLevels()
+//     texture->setFormat(QOpenGLTexture::RGBA32F);
+//     texture->allocateStorage();
+
+//     return texture;
+// }
+
+GLuint IblSampler::createCubemap(bool withMipmaps)
+{
+    GLuint tex;
+    gl->glGenTextures(1, &tex);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, tex);
+
+    for (unsigned int i = 0; i < 6; ++i) {
+        gl->glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB32F,
+                         textureSize, textureSize, 0, GL_RGBA, GL_FLOAT,
+                         nullptr);
+    }
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S,
+                        GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T,
+                        GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R,
+                        GL_CLAMP_TO_EDGE);
+
+    if (withMipmaps)
+        gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER,
+                            GL_LINEAR_MIPMAP_LINEAR);
+    else
+        gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER,
+                            GL_LINEAR);
+    gl->glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    if (withMipmaps)
+        gl->glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+
+    return tex;
+}
+
+GLuint IblSampler::createLut()
+{
+    GLuint tex;
+    gl->glGenTextures(1, &tex);
+    gl->glBindTexture(GL_TEXTURE_2D, tex);
+
+    gl->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, lutResolution, lutResolution,
+                     0, GL_RGBA, GL_FLOAT, nullptr);
+
+    gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+    gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    gl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    return tex;
+}
+
+void IblSampler::panoramaToCubemap()
+{
+    // todo: cleanup old cubemap
+
+    auto vertSource = shaderCache->generateShaderSource("fullscreen.vert");
+    auto fragSource =
+        shaderCache->generateShaderSource("panorama_to_cubemap.frag");
+
+    auto shader = createShader(vertSource, fragSource);
+
+    // render each face
+    for (int i = 0; i < 6; ++i) {
+        gl->glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->handle());
+        gl->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                                   GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,
+                                   cubemapTextureID, 0);
+
+        gl->glViewport(0, 0, textureSize, textureSize);
+        gl->glClearColor(1.0, 0, 0, 0);
+        gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+        shader->bind();
+        inputTexture->bind(0);
+
+        shader->setUniformValue("u_panorama", 0);
+        shader->setUniformValue("u_currentFace", i);
+
+        vbo->bind();
+        gl->glEnableVertexAttribArray((int)VertexUsage::Position);
+        gl->glEnableVertexAttribArray((int)VertexUsage::TexCoord0);
+        gl->glVertexAttribPointer((int)VertexUsage::Position, 3, GL_FLOAT,
+                                  GL_FALSE, 5 * sizeof(float), nullptr);
+        gl->glVertexAttribPointer((int)VertexUsage::TexCoord0, 2, GL_FLOAT,
+                                  GL_FALSE, 5 * sizeof(float),
+                                  reinterpret_cast<void*>(3 * sizeof(float)));
+
+        gl->glDrawArrays(GL_TRIANGLES, 0, 3);
+
+        vbo->release();
+    }
+
+    // gl->glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    auto ctx = QOpenGLContext::currentContext();
+    gl->glBindFramebuffer(GL_FRAMEBUFFER, ctx->defaultFramebufferObject());
+
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, cubemapTextureID);
+    gl->glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+}
+
+QOpenGLShaderProgram* IblSampler::createShader(const QString& vertSource,
+                                               const QString& fragSource)
+{
+    QOpenGLShader* vshader = new QOpenGLShader(QOpenGLShader::Vertex);
+    QOpenGLShader* fshader = new QOpenGLShader(QOpenGLShader::Fragment);
+    auto program = new QOpenGLShaderProgram;
+
+    if (!vshader->compileSourceCode(vertSource)) {
+        qDebug() << "VERTEX SHADER ERROR";
+        qDebug() << vshader->log();
+    }
+
+    if (!fshader->compileSourceCode(fragSource)) {
+        qDebug() << "FRAGMENT SHADER ERROR";
+        qDebug() << fshader->log();
+    }
+
+    program->removeAllShaders();
+
+    program->addShader(vshader);
+    program->addShader(fshader);
+
+    program->bindAttributeLocation("a_pos", (int)VertexUsage::Position);
+    program->bindAttributeLocation("a_color", (int)VertexUsage::Color);
+    program->bindAttributeLocation("a_texCoord", (int)VertexUsage::TexCoord0);
+
+    if (!program->link()) {
+        qDebug() << "SHADER LINK ERROR";
+        qDebug() << program->log();
+    }
+
+    return program;
+}
+
+void IblSampler::applyFilter(int distribution, float roughness,
+                             int targetMipLevel, int targetTexture,
+                             int sampleCount, float lodBias)
+{
+    auto currentTextureSize = this->textureSize >> targetMipLevel;
+
+    auto vertSource = shaderCache->generateShaderSource("fullscreen.vert");
+    auto fragSource = shaderCache->generateShaderSource("ibl_filtering.frag");
+
+    auto shader = createShader(vertSource, fragSource);
+
+    // render each face
+    for (int i = 0; i < 6; ++i) {
+        gl->glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->handle());
+        gl->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                                   GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,
+                                   targetTexture, targetMipLevel);
+
+        gl->glBindTexture(GL_TEXTURE_CUBE_MAP, targetTexture);
+
+        gl->glViewport(0, 0, currentTextureSize, currentTextureSize);
+        gl->glClearColor(1, 0, 0, 0);
+        gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+        shader->bind();
+        gl->glActiveTexture(GL_TEXTURE0);
+        gl->glBindTexture(GL_TEXTURE_CUBE_MAP, cubemapTextureID);
+        // cubemapTexture->bind(0);
+        shader->setUniformValue("uCubeMap", 0);
+
+        shader->setUniformValue("u_roughness", roughness);
+        shader->setUniformValue("u_sampleCount", sampleCount);
+        shader->setUniformValue("u_width", textureSize);
+        shader->setUniformValue("u_lodBias", lodBias);
+        shader->setUniformValue("u_distribution", distribution);
+        shader->setUniformValue("u_currentFace", i);
+        shader->setUniformValue("u_isGeneratingLUT", 0);
+
+        vbo->bind();
+        gl->glEnableVertexAttribArray((int)VertexUsage::Position);
+        gl->glEnableVertexAttribArray((int)VertexUsage::TexCoord0);
+        gl->glVertexAttribPointer((int)VertexUsage::Position, 3, GL_FLOAT,
+                                  GL_FALSE, 5 * sizeof(float), nullptr);
+        gl->glVertexAttribPointer((int)VertexUsage::TexCoord0, 2, GL_FLOAT,
+                                  GL_FALSE, 5 * sizeof(float),
+                                  reinterpret_cast<void*>(3 * sizeof(float)));
+
+        gl->glDrawArrays(GL_TRIANGLES, 0, 3);
+
+        vbo->release();
+    }
+
+    // gl->glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    auto ctx = QOpenGLContext::currentContext();
+    gl->glBindFramebuffer(GL_FRAMEBUFFER, ctx->defaultFramebufferObject());
+}
+
+void IblSampler::cubeMapToLambertian()
+{
+    this->applyFilter(0, 0.0, 0, this->lambertianTextureID,
+                      this->lambertianSampleCount);
+
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, lambertianTextureID);
+    gl->glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+}
+
+void IblSampler::cubeMapToGGX()
+{
+    for (int currentMipLevel = 0; currentMipLevel <= this->mipmapLevels;
+         ++currentMipLevel) {
+        auto roughness = ((float)currentMipLevel) / (this->mipmapLevels - 1);
+        this->applyFilter(1, roughness, currentMipLevel, this->ggxTextureID,
+                          this->ggxSampleCount);
+    }
+}
+void IblSampler::cubeMapToSheen()
+{
+    for (auto currentMipLevel = 0; currentMipLevel <= this->mipmapLevels;
+         ++currentMipLevel) {
+        auto roughness = (currentMipLevel) / (this->mipmapLevels - 1);
+        this->applyFilter(2, roughness, currentMipLevel, this->sheenTextureID,
+                          this->sheenSamplCount);
+    }
+}
+
+void IblSampler::sampleLut(int distribution, int targetTextureId,
+                           int currentTextureSize)
+{
+    auto vertSource = shaderCache->generateShaderSource("fullscreen.vert");
+    auto fragSource = shaderCache->generateShaderSource("ibl_filtering.frag");
+
+    auto shader = createShader(vertSource, fragSource);
+
+    // render each face
+    gl->glBindFramebuffer(GL_FRAMEBUFFER, framebuffer->handle());
+    gl->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                               GL_TEXTURE_2D, targetTextureId, 0);
+
+    gl->glViewport(0, 0, currentTextureSize, currentTextureSize);
+    gl->glClearColor(0, 0, 0, 1);
+    gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    shader->bind();
+    // cubemapTexture->bind(0);
+    gl->glActiveTexture(GL_TEXTURE0);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, cubemapTextureID);
+    shader->setUniformValue("uCubeMap", 0);
+
+    shader->setUniformValue("u_roughness", 0.0f);
+    shader->setUniformValue("u_sampleCount", 512);
+    shader->setUniformValue("u_width", 0.0f);
+    shader->setUniformValue("u_lodBias", 0.0f);
+    shader->setUniformValue("u_distribution", distribution);
+    shader->setUniformValue("u_currentFace", 0);
+    shader->setUniformValue("u_isGeneratingLUT", 1);
+
+    vbo->bind();
+    gl->glEnableVertexAttribArray((int)VertexUsage::Position);
+    gl->glEnableVertexAttribArray((int)VertexUsage::TexCoord0);
+    gl->glVertexAttribPointer((int)VertexUsage::Position, 3, GL_FLOAT, GL_FALSE,
+                              5 * sizeof(float), nullptr);
+    gl->glVertexAttribPointer((int)VertexUsage::TexCoord0, 2, GL_FLOAT,
+                              GL_FALSE, 5 * sizeof(float),
+                              reinterpret_cast<void*>(3 * sizeof(float)));
+
+    gl->glDrawArrays(GL_TRIANGLES, 0, 6);
+
+    vbo->release();
+
+    // gl->glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    auto ctx = QOpenGLContext::currentContext();
+    gl->glBindFramebuffer(GL_FRAMEBUFFER, ctx->defaultFramebufferObject());
+}
+
+void IblSampler::sampleGGXLut()
+{
+    this->ggxLutTextureID = this->createLut();
+    this->sampleLut(1, this->ggxLutTextureID, this->lutResolution);
+}
+
+void IblSampler::sampleCharlieLut()
+{
+    this->charlieLutTextureID = this->createLut();
+    this->sampleLut(2, this->charlieLutTextureID, this->lutResolution);
+}
diff --git a/src/viewer3d/iblsampler.h b/src/viewer3d/iblsampler.h
new file mode 100644
index 00000000..267f944d
--- /dev/null
+++ b/src/viewer3d/iblsampler.h
@@ -0,0 +1,82 @@
+#pragma once
+
+#include <QOpenGLContext>
+
+class QOpenGLFramebufferObject;
+class QOpenGLFunctions;
+class QOpenGLTexture;
+class QOpenGLBuffer;
+class QOpenGLVertexArrayObject;
+class ShaderCache;
+class QOpenGLShaderProgram;
+
+// reference:
+// https://github.com/KhronosGroup/glTF-Sample-Viewer/blob/master/source/ibl_sampler.js
+
+class IblSampler {
+public:
+    QOpenGLFunctions* gl;
+
+    int textureSize = 256;
+    int ggxSampleCount = 1024;
+    int lambertianSampleCount = 2048;
+    int sheenSamplCount = 64;
+    float lodBias = 0.0;
+    int lowestMipLevel = 4;
+    int lutResolution = 1024;
+
+    int mipmapLevels = -1;
+
+    // QOpenGLTexture* lambertianTexture;
+    // QOpenGLTexture* ggxTexture;
+    // QOpenGLTexture* sheenTexture;
+    GLuint lambertianTextureID;
+    GLuint ggxTextureID;
+    GLuint sheenTextureID;
+
+    // QOpenGLTexture* ggxLutTexture;
+    // QOpenGLTexture* charlieLutTexture;
+    GLuint ggxLutTextureID;
+    GLuint charlieLutTextureID;
+
+    QOpenGLTexture* inputTexture;
+    // QOpenGLTexture* cubemapTexture;
+    // GLuint inputTextureID;
+    GLuint cubemapTextureID;
+
+    QOpenGLFramebufferObject* framebuffer;
+    QOpenGLVertexArrayObject* vao;
+    QOpenGLBuffer* vbo;
+
+    ShaderCache* shaderCache;
+
+    IblSampler();
+
+    void loadPanorama(const QString& path);
+
+    // QOpenGLTexture* createCubemap(bool withMipmaps);
+    // QOpenGLTexture* createLut();
+    GLuint createCubemap(bool withMipmaps);
+    GLuint createLut();
+
+    // generation functions
+    void panoramaToCubemap();
+    void cubeMapToLambertian();
+    void cubeMapToGGX();
+    void cubeMapToSheen();
+
+    void sampleGGXLut();
+    void sampleCharlieLut();
+
+    void applyFilter(int distribution, float roughness, int targetMipLevel,
+                     int targetTexture, int sampleCount, float lodBias = 0.0);
+    void sampleLut(int distribution, int targetTextureId,
+                   int currentTextureSize);
+
+    void init(const QString& panoramaPath);
+
+    QOpenGLShaderProgram* createShader(const QString& vertSource,
+                                       const QString& fragSource);
+
+    void filterAll();
+};
\ No newline at end of file
diff --git a/src/viewer3d/main.cpp b/src/viewer3d/main.cpp
new file mode 100644
index 00000000..3a0eec34
--- /dev/null
+++ b/src/viewer3d/main.cpp
@@ -0,0 +1,47 @@
+#include "viewer3d.h"
+#include <QApplication>
+#include <QMainWindow>
+#include <QStackedLayout>
+
+#include <QOpenGLContext>
+#include <QOpenGLWindow>
+#include <QSurfaceFormat>
+
+int main(int argc, char* argv[])
+{
+    QApplication a(argc, argv);
+    QMainWindow w;
+
+    // init gl
+    QSurfaceFormat fmt;
+    fmt.setDepthBufferSize(24);
+
+    // Request OpenGL 3.3 core or OpenGL ES 3.0.
+    // if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL) {
+    qDebug("Requesting 3.3 core context");
+    fmt.setVersion(3, 3);
+    fmt.setProfile(QSurfaceFormat::CoreProfile);
+    // https://doc.qt.io/qt-6/qopengldebuglogger.html
+    fmt.setOption(QSurfaceFormat::DebugContext);
+    // }
+    // else {
+    //     qDebug("Requesting 3.0 context");
+    //     fmt.setVersion(3, 0);
+    // }
+
+    QSurfaceFormat::setDefaultFormat(fmt);
+
+    auto viewer = new Viewer3D();
+
+    // use viewer as you would in texturlab project
+    // auto albedoId = loadTexture();
+    // viewer->setAlbedoTexture(albedoId);
+
+    w.setCentralWidget(viewer);
+    w.resize(800, 600);
+
+    w.show();
+    w.showMaximized();
+
+    return a.exec();
+}
diff --git a/src/viewer3d/renderer/renderer.cpp b/src/viewer3d/renderer/renderer.cpp
new file mode 100644
index 00000000..15655192
--- /dev/null
+++ b/src/viewer3d/renderer/renderer.cpp
@@ -0,0 +1,386 @@
+#include "renderer.h"
+#include "../gltf/gltf.cpp"
+#include "../iblsampler.h"
+#include "../shadercache.h"
+
+#include <QFile>
+#include <iostream>
+
+#include <QMatrix4x4>
+#include <QOpenGLBuffer>
+#include <QOpenGLContext>
+#include <QOpenGLDebugLogger>
+#include <QOpenGLExtraFunctions>
+#include <QOpenGLFunctions>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLTexture>
+#include <QOpenGLVertexArrayObject>
+
+#define TINYGLTF_IMPLEMENTATION
+#define TINYGLTF_NO_STB_IMAGE
+#define TINYGLTF_NO_INCLUDE_STB_IMAGE
+#define TINYGLTF_NO_STB_IMAGE_WRITE
+#include "../gltf/tiny_gltf.h"
+
+class MeshPrivate {
+public:
+    tinygltf::Primitive primitive;
+    tinygltf::Accessor indexAccessor;
+};
+
+void Renderer::init(QOpenGLFunctions* gl)
+{
+    this->gl = gl;
+
+    // init shader cache
+    shaderCache = new ShaderCache();
+    shaderCache->addShaderFile("animation.glsl", ":assets/animation.glsl");
+    shaderCache->addShaderFile("brdf.glsl", ":assets/brdf.glsl");
+    shaderCache->addShaderFile("functions.glsl", ":assets/functions.glsl");
+    shaderCache->addShaderFile("iridiscence.glsl", ":assets/iridiscence.glsl");
+    shaderCache->addShaderFile("ibl.glsl", ":assets/ibl.glsl");
+    shaderCache->addShaderFile("material_info.glsl",
+                               ":assets/material_info.glsl");
+    shaderCache->addShaderFile("pbr.frag", ":assets/pbr.frag");
+    shaderCache->addShaderFile("primitive.vert", ":assets/primitive.vert");
+    shaderCache->addShaderFile("punctual.glsl", ":assets/punctual.glsl");
+    shaderCache->addShaderFile("textures.glsl", ":assets/textures.glsl");
+    shaderCache->addShaderFile("tonemapping.glsl", ":assets/tonemapping.glsl");
+
+    // init ibls
+    iblSampler = new IblSampler();
+    iblSampler->gl = gl;
+}
+
+void Renderer::loadEnvironment(const QString& path)
+{
+    iblSampler->init(path);
+    iblSampler->filterAll();
+}
+
+void Renderer::renderMesh(Mesh* mesh, Material* material) {}
+
+void Renderer::updateMaterial(Material* material)
+{
+    if (material->shader) {
+        material->shader->deleteLater();
+    }
+
+    // flags
+    QStringList flags;
+
+    // the default
+    // todo: make this dynamic instead of using flags
+    flags << "USE_IBL 1";
+
+    // determine attribs from mesh
+    flags << "HAS_NORMAL_VEC3 1";
+    flags << "HAS_TEXCOORD_0_VEC2 1";
+    // flags << "HAS_TANGENT_VEC4 1";
+
+    flags << "DEBUG_NONE 1"; // IMPORTANT!! caused many headaches..
+    flags << "DEBUG DEBUG_NONE";
+
+    if (material->albedoMapId != 0)
+        flags << "HAS_BASE_COLOR_MAP 1";
+    if (material->normalMapId != 0)
+        flags << "HAS_NORMAL_MAP 1";
+    if (material->metalnessMapId != 0)
+        flags << "HAS_METALNESS_MAP 1";
+    if (material->roughnessMapId != 0)
+        flags << "HAS_ROUGHNESS_MAP 1";
+    // flags << "HAS_NORMAL_MAP 1";
+    // flags << "HAS_ROUGHNESS_MAP 1";
+    // flags << "HAS_METALNESS_MAP 1";
+    // flags << "HAS_METALLIC_ROUGHNESS_MAP 1";
+    // flags << "HAS_EMISSIVE_MAP 1";
+    flags << "MATERIAL_METALLICROUGHNESS 1"; // MR mode
+
+    // blending
+    flags << "ALPHAMODE_OPAQUE 0";
+    flags << "ALPHAMODE_MASK 1";
+    flags << "ALPHAMODE_BLEND 2";
+    flags << "ALPHAMODE ALPHAMODE_OPAQUE";
+
+    // tone mapping
+    // flags << "TONEMAP_ACES_NARKOWICZ 1";
+
+    // build shader
+    auto vertShader =
+        shaderCache->generateShaderSource("primitive.vert", flags);
+    auto fragShader = shaderCache->generateShaderSource("pbr.frag", flags);
+
+    auto shader = new QOpenGLShaderProgram;
+    shader->bind();
+    shader->addShaderFromSourceCode(QOpenGLShader::Vertex, vertShader);
+    shader->addShaderFromSourceCode(QOpenGLShader::Fragment, fragShader);
+
+    shader->bindAttributeLocation("a_position", (int)VertexUsage::Position);
+    shader->bindAttributeLocation("a_normal", (int)VertexUsage::Normal);
+    shader->bindAttributeLocation("a_tangent", (int)VertexUsage::Tangent);
+    shader->bindAttributeLocation("a_color_0", (int)VertexUsage::Color);
+    shader->bindAttributeLocation("a_texcoord_0", (int)VertexUsage::TexCoord0);
+    shader->bindAttributeLocation("a_texcoord_1", (int)VertexUsage::TexCoord1);
+
+    shader->link();
+
+    material->shader = shader;
+    material->needsUpdate = false;
+}
+
+#define BUFFER_OFFSET(i) ((char*)NULL + (i))
+bool loadGltfModel(tinygltf::Model& model, const QString& filename);
+
+// https://github.com/syoyo/tinygltf/blob/release/examples/basic/main.cpp
+Mesh* loadMeshFromRc(const QString& path)
+{
+    auto gl = QOpenGLContext::currentContext()->functions();
+
+    tinygltf::Model model;
+    if (!loadGltfModel(model, path)) {
+        return nullptr;
+    }
+
+    // just convert the first mesh
+    if (model.meshes.size() == 0)
+        return nullptr;
+
+    auto mesh = model.meshes[0];
+
+    auto vao = new QOpenGLVertexArrayObject(nullptr);
+    vao->create();
+    vao->bind();
+
+    std::map<int, QOpenGLBuffer*> vbos;
+
+    // upload all model buffer views into GPU memory
+    for (size_t i = 0; i < model.bufferViews.size(); ++i) {
+        const tinygltf::BufferView& bufferView = model.bufferViews[i];
+        if (bufferView.target == 0) { // TODO impl drawarrays
+            std::cout << "WARN: bufferView.target is zero" << std::endl;
+            continue; // Unsupported bufferView.
+        }
+
+        const tinygltf::Buffer& buffer = model.buffers[bufferView.buffer];
+        std::cout << "bufferview.target " << bufferView.target << std::endl;
+
+        // vertex or index buffer
+        auto vbo = new QOpenGLBuffer((QOpenGLBuffer::Type)bufferView.target);
+        vbo->create();
+        vbo->bind();
+        vbo->setUsagePattern(QOpenGLBuffer::StaticDraw);
+        vbo->allocate(&buffer.data.at(0) + bufferView.byteOffset,
+                      bufferView.byteLength);
+        vbo->release();
+
+        vbos[i] = vbo;
+    }
+
+    tinygltf::Primitive primitive = mesh.primitives[0];
+    tinygltf::Accessor indexAccessor = model.accessors[primitive.indices];
+    QList<VertexUsage> attribs;
+
+    // assign vertex channels to buffers
+    for (auto& attrib : primitive.attributes) {
+        tinygltf::Accessor accessor = model.accessors[attrib.second];
+        int byteStride =
+            accessor.ByteStride(model.bufferViews[accessor.bufferView]);
+        // glBindBuffer(GL_ARRAY_BUFFER, vbos[accessor.bufferView]);
+        vbos[accessor.bufferView]->bind();
+
+        int size = 1;
+        if (accessor.type != TINYGLTF_TYPE_SCALAR) {
+            size = accessor.type;
+        }
+
+        int vaa = -1;
+        if (attrib.first.compare("POSITION") == 0)
+            vaa = (int)VertexUsage::Position;
+        if (attrib.first.compare("NORMAL") == 0)
+            vaa = (int)VertexUsage::Normal;
+        if (attrib.first.compare("TANGENT") == 0)
+            vaa = (int)VertexUsage::Tangent;
+        if (attrib.first.compare("TEXCOORD_0") == 0)
+            vaa = (int)VertexUsage::TexCoord0;
+        if (attrib.first.compare("TEXCOORD_1") == 0)
+            vaa = (int)VertexUsage::TexCoord1;
+        if (attrib.first.compare("TEXCOORD_2") == 0)
+            vaa = (int)VertexUsage::TexCoord2;
+        if (vaa > -1) {
+            gl->glEnableVertexAttribArray(vaa);
+            gl->glVertexAttribPointer(vaa, size, accessor.componentType,
+                                      accessor.normalized ? GL_TRUE : GL_FALSE,
+                                      byteStride,
+                                      BUFFER_OFFSET(accessor.byteOffset));
+            attribs.append((VertexUsage)vaa);
+        }
+        else
+            std::cout << "vaa missing: " << attrib.first << std::endl;
+    }
+
+    vao->release();
+
+    Mesh* finalMesh = new Mesh;
+    finalMesh->vao = vao;
+    finalMesh->vbos = vbos;
+    finalMesh->attribs = attribs;
+
+    finalMesh->indexBuffer = vbos.at(indexAccessor.bufferView);
+    // finalMesh->primitive = primitive;
+    // finalMesh->indexAccessor = indexAccessor;
+    finalMesh->primitiveMode = primitive.mode;
+    finalMesh->numElements = indexAccessor.count;
+    finalMesh->indexType = indexAccessor.componentType;
+    finalMesh->indexByteOffset = indexAccessor.byteOffset;
+
+    return finalMesh;
+}
+
+// https://github.com/KhronosGroup/glTF-Sample-Viewer/blob/glTF-WebGL-PBR/mesh.js#L113
+// https://github.com/KhronosGroup/glTF-Sample-Viewer/blob/master/source/Renderer/renderer.js
+void Renderer::renderGltfMesh(Mesh* mesh, Material* material,
+                              const QVector3D& camPos,
+                              const QMatrix4x4& worldMatrix,
+                              const QMatrix4x4& viewMatrix,
+                              const QMatrix4x4& projMatrix)
+{
+    // setup material
+    auto mat = material;
+    if (mat->needsUpdate) {
+        this->updateMaterial(mat);
+    }
+
+    auto shader = mat->shader;
+    shader->bind();
+
+    QMatrix4x4 mvp;
+    mvp.setToIdentity();
+    mvp = projMatrix * viewMatrix * worldMatrix;
+
+    auto modelInverse = worldMatrix.inverted();
+    auto normalMatrix = modelInverse.transposed();
+
+    shader->setUniformValue("u_ViewProjectionMatrix", projMatrix * viewMatrix);
+    shader->setUniformValue("u_ModelMatrix", worldMatrix);
+    shader->setUniformValue("u_NormalMatrix", normalMatrix);
+    shader->setUniformValue("u_Exposure", 1.0f);
+    shader->setUniformValue("u_Camera", camPos);
+
+    // default mat props
+    shader->setUniformValue("u_BaseColorFactor", material->albedo);
+    shader->setUniformValue("u_MetallicFactor", material->metalness);
+    shader->setUniformValue("u_RoughnessFactor", material->roughness);
+    shader->setUniformValue("u_EmissiveStrength", 0.f);
+    shader->setUniformValue("u_NormalScale", material->normalIntensity);
+    // uv sets
+    shader->setUniformValue("u_BaseColorUVSet", 0);
+    shader->setUniformValue("u_NormalUVSet", 0);
+    shader->setUniformValue("u_MetalnessUVSet", 0);
+    shader->setUniformValue("u_RoughnessUVSet", 0);
+    shader->setUniformValue("u_EmissiveUVSet", 0);
+    shader->setUniformValue("u_MetallicRoughnessUVSet", 0);
+
+    if (mat->albedoMapId != 0) {
+        shader->setUniformValue("u_BaseColorSampler", 0);
+        gl->glActiveTexture(GL_TEXTURE0);
+        gl->glBindTexture(GL_TEXTURE_2D, mat->albedoMapId);
+    }
+
+    // albedo
+    // mainProgram->setUniformValue("u_BaseColorFactor", mat->albedo);
+    // shader->setUniformValue("u_BaseColorSampler", 0);
+    // mat->albedoMap->bind(0);
+    // shader->setUniformValue("u_NormalSampler", 1);
+    // mat->normalMap->bind(1);
+    // shader->setUniformValue("u_MetalnessSampler", 2);
+    // mat->metalnessMap->bind(2);
+    // shader->setUniformValue("u_RoughnessSampler", 3);
+    // mat->roughnessMap->bind(3);
+
+    // pbr maps - they start at 8
+    // https://github.com/KhronosGroup/glTF-Sample-Viewer/blob/master/source/Renderer/renderer.js#L732
+    shader->setUniformValue("u_LambertianEnvSampler", 8);
+    // iblSampler->lambertianTexture->bind(8);
+    gl->glActiveTexture(GL_TEXTURE0 + 8);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, iblSampler->lambertianTextureID);
+    shader->setUniformValue("u_GGXEnvSampler", 9);
+    // iblSampler->ggxTexture->bind(9);
+    gl->glActiveTexture(GL_TEXTURE0 + 9);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, iblSampler->ggxTextureID);
+    shader->setUniformValue("u_GGXLUT", 10);
+    // iblSampler->ggxLutTexture->bind(10);
+    gl->glActiveTexture(GL_TEXTURE0 + 10);
+    gl->glBindTexture(GL_TEXTURE_2D, iblSampler->ggxLutTextureID);
+    shader->setUniformValue("u_CharlieEnvSampler", 11);
+    // iblSampler->sheenTexture->bind(11);
+    gl->glActiveTexture(GL_TEXTURE0 + 11);
+    gl->glBindTexture(GL_TEXTURE_CUBE_MAP, iblSampler->sheenTextureID);
+    shader->setUniformValue("u_CharlieLUT", 12);
+    // iblSampler->charlieLutTexture->bind(12);
+    gl->glActiveTexture(GL_TEXTURE0 + 12);
+    gl->glBindTexture(GL_TEXTURE_2D, iblSampler->charlieLutTextureID);
+
+    shader->setUniformValue("u_MipCount", iblSampler->mipmapLevels);
+
+    QMatrix3x3 envRot;
+    envRot.setToIdentity();
+    shader->setUniformValue("u_EnvRotation", envRot);
+    shader->setUniformValue("u_EnvIntensity", 1.0f);
+
+    // render mesh
+    mesh->vao->bind();
+    // tinygltf::Primitive primitive = mesh->primitive;
+    // tinygltf::Accessor indexAccessor = mesh->indexAccessor;
+
+    // glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vbos.at(indexAccessor.bufferView));
+    mesh->indexBuffer->bind();
+
+    // gl->glEnableVertexAttribArray((int)VertexUsage::Position);
+    // gl->glEnableVertexAttribArray((int)VertexUsage::Normal);
+    // gl->glEnableVertexAttribArray((int)VertexUsage::Tangent);
+    // gl->glEnableVertexAttribArray((int)VertexUsage::TexCoord0);
+
+    // glDrawElements(primitive.mode, indexAccessor.count,
+    //                indexAccessor.componentType,
+    //                BUFFER_OFFSET(indexAccessor.byteOffset));
+
+    glDrawElements(mesh->primitiveMode, mesh->numElements, mesh->indexType,
+                   BUFFER_OFFSET(mesh->indexByteOffset));
+
+    mesh->vao->release();
+}
+
+bool loadGltfModel(tinygltf::Model& model, const QString& filename)
+{
+    QFile file(filename);
+    if (!file.open(QIODevice::ReadOnly)) {
+        qDebug() << "filenot opened \n";
+        return false;
+    }
+
+    auto text = file.readAll().toStdString();
+
+    tinygltf::TinyGLTF loader;
+    std::string err;
+    std::string warn;
+
+    bool res = loader.LoadASCIIFromString(&model, &err, &warn, text.c_str(),
+                                          text.length(), "");
+    // bool res = loader.LoadASCIIFromFile(&model, &err, &warn, text.c_str(),
+    //                                     text.length());
+    if (!warn.empty()) {
+        std::cout << "WARN: " << warn << std::endl;
+    }
+
+    if (!err.empty()) {
+        std::cout << "ERR: " << err << std::endl;
+    }
+
+    if (!res)
+        std::cout << "Failed to load glTF: " << filename.toStdString()
+                  << std::endl;
+    else
+        std::cout << "Loaded glTF: " << filename.toStdString() << std::endl;
+
+    return res;
+}
\ No newline at end of file
diff --git a/src/viewer3d/renderer/renderer.h b/src/viewer3d/renderer/renderer.h
new file mode 100644
index 00000000..8e1dcc90
--- /dev/null
+++ b/src/viewer3d/renderer/renderer.h
@@ -0,0 +1,106 @@
+#pragma once
+
+#include <QList>
+#include <QMatrix3x3>
+#include <QMatrix4x4>
+#include <QStringList>
+#include <QVector3D>
+#include <map>
+
+class QOpenGLVertexArrayObject;
+class QOpenGLBuffer;
+class Material;
+class QOpenGLFunctions;
+class QOpenGLTexture;
+class QOpenGLShaderProgram;
+class IblSampler;
+class ShaderCache;
+
+typedef unsigned int GLuint;
+
+enum class VertexUsage : int {
+    Position = 0,
+    Color = 1,
+    TexCoord0 = 2,
+    TexCoord1 = 3,
+    TexCoord2 = 4,
+    TexCoord3 = 5,
+    Normal = 6,
+    Tangent = 7,
+    Count = 8
+};
+
+enum class MeshType { Generated, Gltf };
+
+class MeshPrivate;
+class Mesh {
+public:
+    QOpenGLVertexArrayObject* vao = nullptr;
+    std::map<int, QOpenGLBuffer*> vbos;
+    QList<VertexUsage> attribs;
+
+    QOpenGLBuffer* indexBuffer = nullptr;
+    // int elementCount;
+    int numElements = 0;
+    int indexByteOffset;
+    int primitiveMode; // GL_TRIANGLES
+    int indexType;     // most likely GL_INT or GL_UNSIGNED_INT
+
+    // transformation props
+    QMatrix4x4 transform;
+    QMatrix3x3 normalMatrix;
+    Material* material = nullptr;
+
+    // determines how to render (for now)
+    // in the future, all meshes should be rendered the same
+    MeshType meshType;
+};
+
+struct Material {
+    QOpenGLShaderProgram* shader = nullptr;
+
+    GLuint albedoMapId = 0;
+    GLuint normalMapId = 0;
+    GLuint metalnessMapId = 0;
+    GLuint roughnessMapId = 0;
+
+    // QOpenGLTexture* albedoMap = nullptr;
+    // QOpenGLTexture* normalMap = nullptr;
+    // QOpenGLTexture* metalnessMap = nullptr;
+    // QOpenGLTexture* roughnessMap = nullptr;
+    // QOpenGLTexture* heightMap = nullptr;
+    // QOpenGLTexture* aoMap = nullptr;
+    // QOpenGLTexture* emissiveMap = nullptr;
+    // QOpenGLTexture* alphaMap = nullptr;
+
+    QVector4D albedo = QVector4D(1, 1, 1, 1);
+    float metalness = 0.0;
+    float normalIntensity = 1.0;
+    float roughness = 0.0;
+    float heightScale = 1.0;
+    float alpha = 1.0;
+    QVector3D emission = QVector3D(1, 1, 1);
+
+    QStringList flags;
+    bool needsUpdate = true;
+};
+
+class Renderer {
+public:
+    IblSampler* iblSampler;
+    ShaderCache* shaderCache;
+    QOpenGLFunctions* gl;
+
+    void init(QOpenGLFunctions* gl);
+    void loadEnvironment(const QString& path);
+
+    void renderMesh(Mesh* mesh, Material* material);
+    void updateMaterial(Material* material);
+
+    void renderGltfMesh(Mesh* mesh, Material* material, const QVector3D& camPos,
+                        const QMatrix4x4& worldMatrix,
+                        const QMatrix4x4& viewMatrix,
+                        const QMatrix4x4& projMatrix);
+};
+
+Mesh* loadMeshFromRc(const QString& path);
diff --git a/src/viewer3d/shadercache.cpp b/src/viewer3d/shadercache.cpp
new file mode 100644
index 00000000..8b6e498d
--- /dev/null
+++ b/src/viewer3d/shadercache.cpp
@@ -0,0 +1,52 @@
+#include "shadercache.h"
+#include <QFile>
+
+void ShaderCache::addShaderSource(const QString& shaderName,
+                                  const QString& shaderSource)
+{
+    shaders[shaderName] = shaderSource;
+}
+
+void ShaderCache::addShaderFile(const QString& shaderName,
+                                const QString& filePath)
+{
+    QFile file(filePath);
+    file.open(QFile::ReadOnly);
+
+    auto source = file.readAll();
+    this->addShaderSource(shaderName, source);
+
+    file.close();
+}
+
+QString ShaderCache::generateShaderSource(const QString& shaderName,
+                                          const QVector<QString> defines)
+{
+    QString flags = "";
+    for (auto define : defines) {
+        flags += "#define " + define + "\n";
+    }
+
+    auto source = getShaderAndResolveIncludes(shaderName);
+    auto finalSource = shaderVersion + flags + source;
+
+    return finalSource;
+}
+
+QString ShaderCache::getShaderAndResolveIncludes(const QString& shader)
+{
+    auto source = this->shaders[shader];
+
+    // https://github.com/KhronosGroup/glTF-Sample-Viewer/blob/master/source/Renderer/shader_cache.js#L15
+    // todo: re-add changes to shaders?
+    for (auto shaderFile : this->shaders.keys()) {
+        auto pattern = "#include <" + shaderFile + ">";
+
+        if (source.contains(pattern)) {
+            auto shaderSource = this->shaders[shaderFile];
+            source.replace(pattern, shaderSource);
+        }
+    }
+
+    return source;
+}
\ No newline at end of file
diff --git a/src/viewer3d/shadercache.h b/src/viewer3d/shadercache.h
new file mode 100644
index 00000000..1acfe6da
--- /dev/null
+++ b/src/viewer3d/shadercache.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <QMap>
+#include <QVector>
+
+class QOpenGLShaderProgram;
+
+class ShaderCache {
+    QMap<QString, QString> shaders;
+    QString shaderVersion = "#version 150 core \n";
+
+public:
+    void addShaderSource(const QString& shaderName,
+                         const QString& shaderSource);
+    void addShaderFile(const QString& shaderName, const QString& filePath);
+
+    QString generateShaderSource(const QString& shaderName,
+                                 const QVector<QString> defines = {});
+
+private:
+    QString getShaderAndResolveIncludes(const QString& shader);
+};
\ No newline at end of file
diff --git a/src/viewer3d/viewer3d.cpp b/src/viewer3d/viewer3d.cpp
new file mode 100644
index 00000000..ff2fb929
--- /dev/null
+++ b/src/viewer3d/viewer3d.cpp
@@ -0,0 +1,460 @@
+#include "viewer3d.h"
+#include <QMatrix4x4>
+#include <QOpenGLWindow>
+#include <QVector3D>
+
+#include <QFile>
+#include <QImage>
+#include <QMouseEvent>
+#include <QOpenGLBuffer>
+#include <QOpenGLContext>
+#include <QOpenGLDebugLogger>
+#include <QOpenGLExtraFunctions>
+#include <QOpenGLFunctions>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLTexture>
+#include <QOpenGLVertexArrayObject>
+#include <QPropertyAnimation>
+#include <QSequentialAnimationGroup>
+#include <QTimer>
+
+#include <iostream>
+
+#include "iblsampler.h"
+#include "shadercache.h"
+
+#include "geometry/geometry.h"
+#include "renderer/renderer.h"
+
+QOpenGLShaderProgram* createMainShader();
+QOpenGLBuffer* loadMesh();
+Mesh* loadMeshFromRc(const QString& path);
+void renderGltfMesh(Mesh* mesh);
+
+Viewer3D::Viewer3D() : QOpenGLWidget()
+{
+    // QOpenGLContext* context = new QOpenGLContext;
+    // context->setFormat(QSurfaceFormat::defaultFormat());
+    // context->create();
+    // this->setContext(context);
+
+    Q_INIT_RESOURCE(viewerassets);
+}
+
+void Viewer3D::reRender() { this->update(); }
+
+void Viewer3D::initializeGL()
+{
+    gl = QOpenGLContext::currentContext()->functions();
+    gl->initializeOpenGLFunctions();
+
+    QOpenGLContext* ctx = QOpenGLContext::currentContext();
+    QOpenGLDebugLogger* logger = new QOpenGLDebugLogger(this);
+    logger->initialize();
+    QObject::connect(logger, &QOpenGLDebugLogger::messageLogged,
+                     [=](const QOpenGLDebugMessage& debugMessage) {
+                         qDebug() << debugMessage;
+                     });
+
+    logger->startLogging();
+
+    vao = new QOpenGLVertexArrayObject;
+    if (vao->create())
+        vao->bind();
+
+    shaderCache = new ShaderCache();
+    shaderCache->addShaderFile("animation.glsl", ":assets/animation.glsl");
+    shaderCache->addShaderFile("brdf.glsl", ":assets/brdf.glsl");
+    shaderCache->addShaderFile("functions.glsl", ":assets/functions.glsl");
+    shaderCache->addShaderFile("iridiscence.glsl", ":assets/iridiscence.glsl");
+    shaderCache->addShaderFile("ibl.glsl", ":assets/ibl.glsl");
+    shaderCache->addShaderFile("material_info.glsl",
+                               ":assets/material_info.glsl");
+    shaderCache->addShaderFile("pbr.frag", ":assets/pbr.frag");
+    shaderCache->addShaderFile("primitive.vert", ":assets/primitive.vert");
+    shaderCache->addShaderFile("punctual.glsl", ":assets/punctual.glsl");
+    shaderCache->addShaderFile("textures.glsl", ":assets/textures.glsl");
+    shaderCache->addShaderFile("tonemapping.glsl", ":assets/tonemapping.glsl");
+
+    // mainProgram = createMainShader();
+
+    // mesh = loadMesh();
+    auto mat = this->loadMaterial();
+    // mat->albedo = QVector4D(0.7, 0.7, 0.7, 1.0);
+    mat->roughness = 1.0;
+    mat->metalness = 0.0;
+    // gltfMesh = loadMeshFromRc(":assets/cube.gltf");
+    gltfMesh = createSphere(this->gl, 2, 64, 64);
+    this->material = mat;
+
+    // setup matrices
+    worldMatrix.setToIdentity();
+
+    viewMatrix.setToIdentity();
+    viewMatrix.lookAt(QVector3D(0, 5, -5), QVector3D(), QVector3D(0, 1, 0));
+
+    projMatrix.setToIdentity();
+    projMatrix.perspective(45, this->width() / (float)this->height(), 1.0,
+                           1000);
+
+    // iblSampler = new IblSampler();
+    // iblSampler->gl = gl;
+    // iblSampler->init(":assets/panorama.hdr");
+    // iblSampler->filterAll();
+
+    renderer = new Renderer();
+    renderer->init(this->gl);
+    if (!defaultEnvPath.isEmpty())
+        renderer->loadEnvironment(defaultEnvPath);
+    else
+        renderer->loadEnvironment(":assets/panorama.hdr");
+}
+
+void Viewer3D::setDefaultEnvironment(const QString path)
+{
+    this->defaultEnvPath = path;
+}
+
+void Viewer3D::paintGL()
+{
+    buildView();
+
+    // this is already done by QOpenGLWidget
+    // also, the supplied width and height are incorrect
+    // gl->glViewport(0, 0, this->width(), this->height());
+    gl->glClearDepthf(1.0);
+    gl->glClearColor(0.1, 0.1, 0.1, 1);
+    gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    gl->glEnable(GL_DEPTH_TEST);
+    // gl->glDisable(GL_CULL_FACE);
+
+    vao->bind();
+
+    // render gltf mesh
+    renderer->renderGltfMesh(gltfMesh, material, camPos, worldMatrix,
+                             viewMatrix, projMatrix);
+
+    // test several in a row
+    // int totalSpheres = 6;
+    // float roughness = 0;
+    // float rinc = 1.0 / (totalSpheres - 1);
+    // float x = -12;
+    // material->metalness = 1;
+    // material->roughness = 0;
+    // for (int i = 0; i < totalSpheres; i++) {
+
+    //     worldMatrix.setColumn(3, QVector4D(x, 0, 0, 1));
+    //     x += 4;
+
+    //     material->roughness = roughness * roughness;
+    //     renderer->renderGltfMesh(gltfMesh, material, camPos, worldMatrix,
+    //                              viewMatrix, projMatrix);
+
+    //     roughness += rinc;
+    // }
+
+    vao->bind();
+}
+
+void Viewer3D::resizeGL(int w, int h)
+{
+    // Calculate aspect ratio
+    qreal aspect = qreal(w) / qreal(h ? h : 1);
+
+    // Set near plane to 3.0, far plane to 7.0, field of view 45 degrees
+    const qreal zNear = 1.0, zFar = 1000.0, fov = 45.0;
+
+    // Reset projection
+    projMatrix.setToIdentity();
+
+    // Set perspective projection
+    projMatrix.perspective(fov, aspect, zNear, zFar);
+}
+
+void Viewer3D::mousePressEvent(QMouseEvent* e)
+{
+    prevPos = e->pos();
+
+    if (e->button() == Qt::LeftButton) {
+        leftMouseDown = true;
+    }
+    if (e->button() == Qt::MiddleButton) {
+        middleMouseDown = true;
+    }
+}
+void Viewer3D::mouseReleaseEvent(QMouseEvent* e)
+{
+    if (e->button() == Qt::LeftButton) {
+        leftMouseDown = true;
+    }
+    if (e->button() == Qt::MiddleButton) {
+        middleMouseDown = true;
+    }
+}
+void Viewer3D::mouseMoveEvent(QMouseEvent* e)
+{
+    if (leftMouseDown) {
+        auto diff = e->pos() - prevPos;
+
+        yaw += -diff.x() * dragSpeed;
+        pitch += diff.y() * dragSpeed;
+
+        prevPos = e->pos();
+
+        this->repaint();
+    }
+}
+
+void Viewer3D::wheelEvent(QWheelEvent* e)
+{
+    auto dir = e->angleDelta().y() > 0 ? -1 : 1;
+    zoom += dir * zoomSpeed;
+
+    this->repaint();
+}
+
+void Viewer3D::buildView()
+{
+    QVector3D view(0, 0, -zoom);
+    // auto rot = QMatrix4x4::rotate();
+    auto rot = QQuaternion::fromEulerAngles(pitch, yaw, 0);
+    auto eyePos = rot.rotatedVector(view);
+
+    // offset by center
+    eyePos += center;
+    camPos = eyePos;
+
+    viewMatrix.setToIdentity();
+    viewMatrix.lookAt(eyePos, center, QVector3D(0, 1, 0));
+}
+
+QOpenGLShaderProgram* createMainShader()
+{
+    QOpenGLShader* vshader = new QOpenGLShader(QOpenGLShader::Vertex);
+    QOpenGLShader* fshader = new QOpenGLShader(QOpenGLShader::Fragment);
+    auto program = new QOpenGLShaderProgram;
+
+    QString vSource = R""""(
+        #version 150 core
+
+        in vec3 a_pos;
+        in vec3 a_normal;
+        in vec3 a_tangent;
+        in vec2 a_texCoord;
+
+        uniform mat4 worldMatrix;
+        uniform mat4 viewMatrix;
+        uniform mat4 projMatrix;
+
+        out vec2 v_texCoord;
+
+        void main()
+        {
+                v_texCoord = a_texCoord*vec2(1,1);
+                vec4 v_pos = projMatrix * viewMatrix * worldMatrix * vec4(a_pos, 1.0);
+                gl_Position = v_pos;
+        }
+    )"""";
+
+    QString fSource = R""""(
+        #version 150 core
+
+        in vec2 v_texCoord;
+        out vec4 fragColor;
+
+        uniform sampler2D diffuse;
+
+        void main()
+        {
+            fragColor = texture(diffuse, v_texCoord);
+        }
+    )"""";
+
+    if (!vshader->compileSourceCode(vSource)) {
+        qDebug() << "VERTEX SHADER ERROR";
+        qDebug() << vshader->log();
+    }
+
+    if (!fshader->compileSourceCode(fSource)) {
+        qDebug() << "FRAGMENT SHADER ERROR";
+        qDebug() << fshader->log();
+    }
+
+    program->removeAllShaders();
+
+    program->addShader(vshader);
+    program->addShader(fshader);
+
+    program->bindAttributeLocation("a_pos", (int)VertexUsage::Position);
+    program->bindAttributeLocation("a_normal", (int)VertexUsage::Normal);
+    program->bindAttributeLocation("a_tangent", (int)VertexUsage::Tangent);
+    program->bindAttributeLocation("a_color", (int)VertexUsage::Color);
+    program->bindAttributeLocation("a_texCoord", (int)VertexUsage::TexCoord0);
+    program->bindAttributeLocation("a_texCoord1", (int)VertexUsage::TexCoord1);
+
+    if (!program->link()) {
+        qDebug() << "SHADER LINK ERROR";
+        qDebug() << program->log();
+
+        return nullptr;
+    }
+
+    return program;
+}
+
+QOpenGLBuffer* loadMesh()
+{
+    // setup vertex array
+    QVector<float> data;
+    // TRIANGLE 1
+    data.append(-1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(0);
+    data.append(0);
+
+    data.append(1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(1);
+    data.append(0);
+
+    data.append(-1);
+    data.append(1);
+    data.append(0);
+
+    data.append(0);
+    data.append(1);
+
+    // TRIANGLE 2
+    data.append(-1);
+    data.append(1);
+    data.append(0);
+
+    data.append(0);
+    data.append(1);
+
+    data.append(1);
+    data.append(-1);
+    data.append(0);
+
+    data.append(1);
+    data.append(0);
+
+    data.append(1);
+    data.append(1);
+    data.append(0);
+
+    data.append(1);
+    data.append(1);
+
+    auto vbo = new QOpenGLBuffer;
+    vbo->create();
+    vbo->bind();
+    vbo->allocate(data.constData(), data.count() * sizeof(float));
+    vbo->release();
+
+    return vbo;
+}
+
+Material* Viewer3D::loadMaterial()
+{
+    auto mat = new Material();
+
+    QStringList flags;
+    flags << "USE_IBL 1";
+    flags << "HAS_NORMAL_VEC3 1";
+    // flags << "LINEAR_OUTPUT 1";
+    // flags << "TEST 1";
+    // flags << "TEST2 1";
+    // flags << "HAS_TANGENT_VEC4 1";
+    // flags << "DEBUG_NORMAL_GEOMETRY 1";
+    flags << "DEBUG_NONE 1"; // IMPORTANT!! caused many headaches..
+    flags << "DEBUG DEBUG_NONE";
+    // flags << "DEBUG DEBUG_METALLIC_ROUGHNESS";
+
+    flags << "HAS_TEXCOORD_0_VEC2 1";
+    flags << "HAS_BASE_COLOR_MAP 1";
+    // flags << "HAS_NORMAL_MAP 1";
+    // flags << "HAS_ROUGHNESS_MAP 1";
+    // flags << "HAS_METALNESS_MAP 1";
+    // flags << "HAS_METALLIC_ROUGHNESS_MAP 1";
+    // flags << "HAS_EMISSIVE_MAP 1";
+    flags << "MATERIAL_METALLICROUGHNESS 1"; // MR mode
+
+    flags << "ALPHAMODE_OPAQUE 0";
+    flags << "ALPHAMODE_MASK 1";
+    flags << "ALPHAMODE_BLEND 2";
+    flags << "ALPHAMODE ALPHAMODE_OPAQUE";
+    // flags << "TONEMAP_ACES_NARKOWICZ 1";
+    // flags << "TONEMAP_ACES_HILL_EXPOSURE_BOOST 1";
+
+    auto vertShader =
+        shaderCache->generateShaderSource("primitive.vert", flags);
+    auto fragShader = shaderCache->generateShaderSource("pbr.frag", flags);
+
+    auto shader = new QOpenGLShaderProgram;
+    shader->bind();
+    shader->addShaderFromSourceCode(QOpenGLShader::Vertex, vertShader);
+    shader->addShaderFromSourceCode(QOpenGLShader::Fragment, fragShader);
+
+    shader->bindAttributeLocation("a_position", (int)VertexUsage::Position);
+    shader->bindAttributeLocation("a_normal", (int)VertexUsage::Normal);
+    shader->bindAttributeLocation("a_tangent", (int)VertexUsage::Tangent);
+    shader->bindAttributeLocation("a_color_0", (int)VertexUsage::Color);
+    shader->bindAttributeLocation("a_texcoord_0", (int)VertexUsage::TexCoord0);
+    shader->bindAttributeLocation("a_texcoord_1", (int)VertexUsage::TexCoord1);
+
+    shader->link();
+    // shader->release();
+
+    mat->shader = shader;
+
+    // textures
+    // mat->albedoMapId = loadTextureId(":assets/brick.jpg");
+    // mat->albedoMap = loadTexture(":assets/brick.jpg");
+    // mat->albedoMap = loadTexture(":assets/albedo.jpg");
+    // mat->normalMap = loadTexture(":assets/normal.jpg");
+    // mat->metalnessMap = loadTexture(":assets/metalness.jpg");
+    // mat->roughnessMap = loadTexture(":assets/roughness.jpg");
+
+    return mat;
+}
+QOpenGLTexture* Viewer3D::loadTexture(const QString& path)
+{
+    QImage image(path);
+    auto tex = new QOpenGLTexture(image);
+    tex->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear,
+                          QOpenGLTexture::Linear);
+    tex->generateMipMaps();
+
+    return tex;
+}
+
+GLuint Viewer3D::loadTextureId(const QString& path)
+{
+    QImage image(path);
+    auto tex = new QOpenGLTexture(image);
+    tex->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear,
+                          QOpenGLTexture::Linear);
+    tex->generateMipMaps();
+
+    return tex->textureId();
+}
+
+void Viewer3D::setAlbedoTexture(GLuint texId)
+{
+    this->material->albedoMapId = texId;
+    this->material->needsUpdate = true;
+}
+
+void Viewer3D::clearAlbedoTexture()
+{
+    this->material->albedoMapId = 0;
+    this->material->needsUpdate = true;
+}
+
+void Viewer3D::clearTextures() { this->clearAlbedoTexture(); }
\ No newline at end of file
diff --git a/src/viewer3d/viewer3d.h b/src/viewer3d/viewer3d.h
new file mode 100644
index 00000000..3aad1ef0
--- /dev/null
+++ b/src/viewer3d/viewer3d.h
@@ -0,0 +1,118 @@
+#pragma once
+
+#include <QMatrix4x4>
+#include <QOpenGLWidget>
+#include <QVector3D>
+
+#include <QImage>
+#include <QOpenGLBuffer>
+#include <QOpenGLContext>
+#include <QOpenGLExtraFunctions>
+#include <QOpenGLFunctions>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLTexture>
+#include <QOpenGLVertexArrayObject>
+#include <QPropertyAnimation>
+#include <QSequentialAnimationGroup>
+#include <QTimer>
+
+class QOpenGLTexture;
+class QOpenGLShaderProgram;
+class QOpenGLBuffer;
+class QOpenGLVertexArrayObject;
+class Mesh;
+class ShaderCache;
+
+class IblSampler;
+class Material;
+class Renderer;
+
+class Viewer3D : public QOpenGLWidget {
+    QOpenGLTexture* texture = nullptr;
+    QOpenGLShaderProgram* mainProgram = nullptr;
+    QOpenGLBuffer* mesh = nullptr;
+    QOpenGLVertexArrayObject* vao = nullptr;
+
+    Renderer* renderer;
+    Material* material;
+    Mesh* gltfMesh;
+    QString defaultEnvPath;
+
+    QOpenGLFunctions* gl = nullptr;
+
+    int m_projMatrixLoc = 0;
+    int m_camMatrixLoc = 0;
+    int m_worldMatrixLoc = 0;
+    int m_myMatrixLoc = 0;
+    int m_lightPosLoc = 0;
+
+    QMatrix4x4 projMatrix;
+    QMatrix4x4 viewMatrix;
+    QMatrix4x4 worldMatrix;
+
+    // QVector3D m_eye;
+    // QVector3D m_target = {0, 0, -1};
+
+    // trackball params
+    float zoom = 7;
+    float zoomSpeed = 0.3f;
+    QPoint prevPos;
+    QVector3D center = {0, 0, 0};
+    QVector3D camPos = {0, 0, 0};
+    float yaw = 0;
+    float pitch = 0;
+    float dragSpeed = 0.5f;
+
+    bool leftMouseDown = false;
+    bool middleMouseDown = false;
+
+    IblSampler* iblSampler;
+    ShaderCache* shaderCache;
+
+protected:
+    void initializeGL();
+    void paintGL();
+    void resizeGL(int w, int h);
+
+    // trackball events
+    void mousePressEvent(QMouseEvent* e) override;
+    void mouseReleaseEvent(QMouseEvent* e) override;
+    void mouseMoveEvent(QMouseEvent* e) override;
+    void wheelEvent(QWheelEvent* e) override;
+
+    void buildView();
+
+    Material* loadMaterial();
+    QOpenGLTexture* loadTexture(const QString& path);
+    GLuint loadTextureId(const QString& path);
+    // void renderMesh(Mesh* mesh);
+    void renderGltfMesh(Mesh* mesh);
+
+public:
+    Viewer3D();
+
+    void reRender();
+
+    // public functions exposed to main app
+    void setAlbedoTexture(GLuint texId);
+    void clearAlbedoTexture();
+    void setNormalTexture(GLuint texId);
+    void clearNormalTexture();
+    void setMetalnessTexture(GLuint texId);
+    void clearMetalnessTexture();
+    void setRoughnessTexture(GLuint texId);
+    void clearRoughnessTexture();
+    void resetMaterial();
+
+    // void setAlphaTexture(GLuint texId);
+    // void setAoTexture(GLuint texId);
+    // void setEmissiveTexture(GLuint texId);
+    // void setHeightTexture(GLuint texId);
+
+    void clearTextures();
+    void resetCamera();
+    void loadEnvironment(const QString path);
+
+    // sets env to use on load
+    void setDefaultEnvironment(const QString path);
+};
\ No newline at end of file
diff --git a/src/viewer3d/viewerassets.qrc b/src/viewer3d/viewerassets.qrc
new file mode 100644
index 00000000..bbabf730
--- /dev/null
+++ b/src/viewer3d/viewerassets.qrc
@@ -0,0 +1,21 @@
+<RCC>
+    <qresource prefix="/">
+    <file alias="assets/brick.jpg">assets/brick.jpg</file>
+    <file alias="assets/cube.gltf">assets/cube.gltf</file>
+    <file alias="assets/panorama.hdr">assets/panorama.hdr</file>
+    <file>assets/fullscreen.vert</file>
+    <file>assets/panorama_to_cubemap.frag</file>
+    <file>assets/ibl_filtering.frag</file>
+    <file>assets/animation.glsl</file>
+    <file>assets/brdf.glsl</file>
+    <file>assets/functions.glsl</file>
+    <file>assets/ibl.glsl</file>
+    <file>assets/iridiscence.glsl</file>
+    <file>assets/material_info.glsl</file>
+    <file>assets/pbr.frag</file>
+    <file>assets/primitive.vert</file>
+    <file>assets/punctual.glsl</file>
+    <file>assets/textures.glsl</file>
+    <file>assets/tonemapping.glsl</file>
+    </qresource>
+</RCC>
\ No newline at end of file
diff --git a/src/views/About.vue b/src/views/About.vue
deleted file mode 100644
index 7054f596..00000000
--- a/src/views/About.vue
+++ /dev/null
@@ -1,5 +0,0 @@
-<template>
-	<div class="about">
-		<h1>This is an about page</h1>
-	</div>
-</template>
diff --git a/src/views/Editor.vue b/src/views/Editor.vue
deleted file mode 100644
index e94a69c7..00000000
--- a/src/views/Editor.vue
+++ /dev/null
@@ -1,14 +0,0 @@
-<template>
-	<canvas width="100" height="100"></canvas>
-</template>
-
-<script lang="ts">
-import { Component, Prop, Vue } from "vue-property-decorator";
-
-@Component
-export default class EditorView extends Vue {
-	mounted() {
-		// hook in animation here
-	}
-}
-</script>
diff --git a/src/views/Home.vue b/src/views/Home.vue
deleted file mode 100644
index f3b51a27..00000000
--- a/src/views/Home.vue
+++ /dev/null
@@ -1,18 +0,0 @@
-<template>
-	<div class="home">
-		<img alt="Vue logo" src="../assets/logo.png" />
-		<HelloWorld msg="Welcome to Your Vue.js + TypeScript App" />
-	</div>
-</template>
-
-<script lang="ts">
-import { Component, Vue } from "vue-property-decorator";
-import HelloWorld from "@/components/HelloWorld.vue"; // @ is an alias to /src
-
-@Component({
-	components: {
-		HelloWorld
-	}
-})
-export default class Home extends Vue {}
-</script>
diff --git a/src/views/Library.vue b/src/views/Library.vue
deleted file mode 100644
index e7c66d37..00000000
--- a/src/views/Library.vue
+++ /dev/null
@@ -1,296 +0,0 @@
-<template>
-	<div class="library-container">
-		<div class style="padding-bottom:1em; display:flex;margin:0.5em;">
-			<div class="search-container">
-				<input type="text" placeholder="Filter.." v-model="filter" />
-			</div>
-			<!-- <div class="size-container">
-        <select>
-          <option>Small Icons</option>
-          <option>Medium Icons</option>
-          <option>Large Icons</option>
-          <option>Exra Large Icons</option>
-        </select>
-			</div>-->
-		</div>
-		<div class="node-list">
-			<div style="overflow:hidden;">
-				<span
-					v-for="item in filteredList"
-					v-on:click="addItem(item.type, item.name)"
-					v-on:dragstart="dragStart($event, item)"
-					:key="item.name"
-					class="libcard"
-					href="#"
-					draggable="true"
-				>
-					<!-- <div class="thumbnail" /> -->
-					<img
-						v-if="imageExists(item.name)"
-						v-bind:src="calcImagePath(item.name)"
-						class="thumbnail no-drag"
-					/>
-					<div v-else class="thumbnail" />
-					<!-- <span class="thumbnail"></span> -->
-
-					<div class="node-name">{{ item.displayName }}</div>
-				</span>
-			</div>
-		</div>
-	</div>
-</template>
-
-<script lang="ts">
-import { Component, Prop, Model, Vue } from "vue-property-decorator";
-import { Editor } from "@/lib/editor";
-import { DesignerLibrary } from "@/lib/designer/library";
-import fs from "fs";
-import path from "path";
-import { AddItemsAction } from "../lib/actions/additemsaction";
-import { UndoStack } from "../lib/undostack";
-
-declare var __static: any;
-
-// this abstracts library nodes and other items such as comments
-export enum LibraryItemType {
-	Node = "node",
-	Comment = "comment",
-	Frame = "frame",
-	Navigation = "navigation"
-}
-
-export class LibraryItem {
-	type: LibraryItemType;
-	name: string;
-	displayName: string;
-
-	constructor(
-		type: LibraryItemType,
-		name: string = "",
-		displayName: string = ""
-	) {
-		this.type = type;
-		this.name = name;
-		this.displayName = displayName;
-	}
-}
-
-@Component
-export default class LibraryView extends Vue {
-	@Prop()
-	library!: DesignerLibrary;
-
-	@Prop()
-	editor!: Editor;
-
-	filter: string = "";
-
-	created() {}
-
-	get items() {
-		let items = Object.values(this.library.nodes).map(n => {
-			let item = new LibraryItem(LibraryItemType.Node);
-			item.name = n.name;
-			item.displayName = n.displayName;
-
-			return item;
-		});
-
-		items.push(new LibraryItem(LibraryItemType.Comment, "comment", "Comment"));
-		items.push(new LibraryItem(LibraryItemType.Frame, "frame", "Frame"));
-		// items.push(
-		// 	new LibraryItem(
-		// 		LibraryItemType.Navigation,
-		// 		"navigation",
-		// 		"Navigation"
-		// 	)
-		// );
-
-		return items;
-	}
-
-	get filteredList() {
-		var kw = this.filter;
-		var list = Object.values(this.items).filter(function(item) {
-			return item.name.toLowerCase().includes(kw.toLowerCase());
-		});
-		return list;
-	}
-
-	addItem(type: LibraryItemType, nodeName: string) {
-		let action: AddItemsAction = null;
-
-		if (type == LibraryItemType.Node) {
-			var dnode = this.library.create(nodeName);
-			var canvas = this.editor.canvas;
-			var n = this.editor.addNode(dnode, canvas.width / 2, canvas.height / 2);
-			n.setCenter(200, 200);
-
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[],
-				[],
-				[],
-				[],
-				[n],
-				[dnode]
-			);
-		}
-		if (type == LibraryItemType.Comment) {
-			let item = this.editor.createComment();
-			//item.setCenter(200, 200);
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[],
-				[item],
-				[],
-				[],
-				[],
-				[]
-			);
-		}
-		if (type == LibraryItemType.Frame) {
-			let item = this.editor.createFrame();
-			//item.setCenter(200, 200);
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[item],
-				[],
-				[],
-				[],
-				[],
-				[]
-			);
-		}
-		if (type == LibraryItemType.Navigation) {
-			let item = this.editor.createNavigation();
-			//item.setCenter(200, 200);
-			action = new AddItemsAction(
-				this.editor.graph,
-				this.editor.designer,
-				[],
-				[],
-				[item],
-				[],
-				[],
-				[]
-			);
-		}
-
-		if (action != null) {
-			UndoStack.current.push(action);
-		}
-
-		return false;
-	}
-
-	dragStart(evt: any, item: any) {
-		evt.dataTransfer.setData("text/plain", JSON.stringify(item));
-	}
-
-	imageExists(node: string) {
-		//return fs.existsSync(`./public/assets/nodes/${node}.png`);
-		return fs.existsSync(path.join(__static, `assets/nodes/${node}.png`));
-	}
-
-	calcImagePath(node: string) {
-		if (process.env.NODE_ENV == "production")
-			return (
-				"file://" + path.join(process.env.BASE_URL, `assets/nodes/${node}.png`)
-			);
-		return path.join(process.env.BASE_URL, `assets/nodes/${node}.png`);
-	}
-
-	mounted() {}
-}
-</script>
-
-<style scoped>
-.libcard {
-	width: 100px;
-	display: block;
-	float: left;
-	padding: 8px;
-	cursor: pointer;
-	border-radius: 4px;
-}
-
-.libcard:hover {
-	background: rgb(0, 0, 0, 0.3);
-}
-
-.thumbnail {
-	display: block;
-	width: 100px;
-	height: 100px;
-	background: #ccc;
-	border-radius: 4px;
-
-	margin-left: -4px;
-	border: solid rgba(0, 0, 0, 0.7) 4px;
-}
-
-.node-name {
-	height: 2.6em;
-	line-height: 1.3em;
-	padding: 0;
-	margin: 0;
-
-	color: white;
-	text-decoration: none;
-}
-
-.node-list {
-	overflow-y: scroll;
-	flex: 1 1 auto;
-
-	font-size: 12px;
-	font-weight: bold;
-}
-
-.search-container {
-	flex-grow: 1;
-}
-
-.search-container input {
-	/* width: calc(100% - 2em); */
-	width: calc(100% - 0.5em) !important;
-	padding: 0.5em;
-	height: 1.5em;
-	flex: 0 1 auto;
-	padding: 4px;
-	margin: 0;
-	border-radius: 3px;
-	/* border: solid #999 1px; */
-	border: 0;
-	color: white;
-	background: #999;
-	outline: none;
-}
-
-.size-container {
-	flex-grow: 0;
-	width: 100px;
-}
-
-.size-container select {
-	width: 100%;
-	height: 100%;
-	border: solid white 1px;
-	border-radius: 2px;
-	color: white;
-	background: #222;
-	padding: 4px;
-}
-
-.library-container {
-	overflow: hidden;
-	height: 100%;
-	box-sizing: border-box;
-	display: flex;
-	flex-flow: column;
-}
-</style>
diff --git a/src/views/NodeProperties.vue b/src/views/NodeProperties.vue
deleted file mode 100644
index fc3919cd..00000000
--- a/src/views/NodeProperties.vue
+++ /dev/null
@@ -1,275 +0,0 @@
-<template>
-	<form
-		class="properties"
-		@submit.prevent="cancelSubmit"
-		:key="node.id"
-		v-if="node != null"
-		ref="form"
-	>
-		<accordion header="Base Properties" v-if="isInstanceNode">
-			<texture-channel :node="getNode" :editor="editor" />
-			<random-seed :node="getNode" />
-		</accordion>
-		<!-- <accordion header="Properties">
-			<component
-				v-for="(p, index) in this.properties"
-				:is="p.componentName"
-				:prop="p.prop"
-				:propHolder="node"
-				:editor="editor"
-				@propertyChanged="propertyChanged"
-				@property-change-completed="propertyChangeCompleted"
-				:key="index"
-			></component>
-		</accordion> -->
-
-		<accordion header="Properties">
-			<component
-				v-for="(p, index) in this.singleProperties"
-				:is="p.componentName"
-				:prop="p.prop"
-				:propHolder="node"
-				:editor="editor"
-				@propertyChanged="propertyChanged"
-				@property-change-completed="propertyChangeCompleted"
-				:key="index"
-			></component>
-			<accordion
-				v-for="(group, groupIndex) in this.groups"
-				:header="group.title"
-				:key="'group' + groupIndex"
-				:collapsed="group.collapsed"
-				@collapseStateChanged="
-					state => onGroupCollapseChange(group.title, state)
-				"
-			>
-				<component
-					v-for="(p, index) in group.props"
-					:is="p.componentName"
-					:prop="p.prop"
-					:propHolder="node"
-					:editor="editor"
-					@propertyChanged="propertyChanged"
-					@property-change-completed="propertyChangeCompleted"
-					:key="'prop' + /* (this.groups.length * groupIndex) +*/ index"
-				></component>
-			</accordion>
-		</accordion>
-	</form>
-</template>
-
-<script lang="ts">
-import { Vue, Model, Prop, Component, Watch } from "vue-property-decorator";
-import FloatPropertyView from "@/components/properties/FloatProp.vue";
-import BoolPropertyView from "@/components/properties/BoolProp.vue";
-import EnumPropertyView from "@/components/properties/EnumProp.vue";
-import ColorPropertyView from "@/components/properties/ColorProp.vue";
-import TextureChannelPropertyView from "@/components/properties/TextureChannelProp.vue";
-import RandomSeedPropertyView from "@/components/properties/RandomSeedProp.vue";
-import Accordion from "@/components/Accordion.vue";
-import { Editor } from "@/lib/editor";
-import { DesignerNode } from "@/lib/designer/designernode";
-import {
-	Property,
-	IPropertyHolder,
-	PropertyGroup
-} from "@/lib/designer/properties";
-import GradientPropertyView from "@/components/properties/GradientProp.vue";
-import StringPropertyView from "@/components/properties/StringProp.vue";
-import ImagePropertyView from "@/components/properties/ImageProp.vue";
-import {
-	IProperyUi,
-	PropertyChangeComplete
-} from "../components/properties/ipropertyui";
-import { UndoStack } from "@/lib/undostack";
-import { PropGroupCache } from "@/utils/propgroupcache";
-import { PropertyChangeAction } from "@/lib/actions/propertychangeaction";
-
-class PropGroup {
-	title: string;
-	props: PropHolder[];
-	collapsed: boolean;
-}
-
-class PropHolder {
-	prop: Property;
-	componentName: string;
-}
-
-@Component({
-	components: {
-		floatView: FloatPropertyView,
-		intView: FloatPropertyView,
-		boolView: BoolPropertyView,
-		enumView: EnumPropertyView,
-		colorView: ColorPropertyView,
-		gradientView: GradientPropertyView,
-		stringView: StringPropertyView,
-		imageView: ImagePropertyView,
-
-		textureChannel: TextureChannelPropertyView,
-		randomSeed: RandomSeedPropertyView,
-		Accordion
-	}
-})
-export default class NodePropertiesView extends Vue implements IProperyUi {
-	@Prop()
-	node: IPropertyHolder;
-
-	@Prop()
-	editor: Editor;
-
-	mounted() {
-		this.setupScrollPos();
-	}
-
-	@Watch("node")
-	setupScrollPos() {
-		this.$nextTick(() => {
-			const container = (this.$refs.form as Element).parentNode as Element;
-			container.addEventListener("scroll", this.handleScroll);
-
-			if (this.node instanceof DesignerNode) {
-				const level = PropGroupCache.getScrollLevel(
-					(this.node as DesignerNode).typeName,
-					0
-				);
-				container.scrollTo(0, level);
-			}
-		});
-	}
-
-	beforeUpdate() {
-		// const container = (this.$refs.form as Element).parentNode as Element;
-		// container.removeEventListener("scroll", this.handleScroll);
-	}
-
-	propertyChanged(propName: string) {
-		// if (this.editor.onnodepropertychanged)
-		//   this.editor.onnodepropertychanged(self.node, prop);
-	}
-
-	// this is needed for undo-redo
-	// some actions dont count as a full change until
-	// the mouse button is up or the widget loses focus
-	// like moving a slider
-	// or typing text
-	propertyChangeCompleted(evt: PropertyChangeComplete) {
-		// let action = new PropertyChangeAction(
-		// 	this,
-		// 	evt.propName,
-		// 	this.node,
-		// 	evt.oldValue,
-		// 	evt.newValue
-		// );
-		// UndoStack.current.push(action);
-	}
-
-	cancelSubmit() {
-		return false;
-	}
-
-	// calculated
-	get properties(): PropHolder[] {
-		let props: PropHolder[] = this.node.properties.map(prop => {
-			//let name: string = "";
-
-			// note: gotta transform nodes because some names like "image" are
-			// built-in and arent compatible with the :is directive
-			return {
-				prop: prop,
-				componentName: prop.type + "View"
-			};
-		});
-
-		//console.log(props);
-		return props;
-	}
-
-	get singleProperties(): PropHolder[] {
-		const singles = this.node.properties.filter(prop => {
-			return prop.group == null;
-		});
-
-		let props: PropHolder[] = singles.map(prop => {
-			// note: gotta transform nodes because some names like "image" are
-			// built-in and arent compatible with the :is directive
-			return {
-				prop: prop,
-				componentName: prop.type + "View"
-			};
-		});
-
-		//console.log(props);
-		return props;
-	}
-
-	get groups(): PropGroup[] {
-		if (!this.node.propertyGroups) return [];
-
-		return this.node.propertyGroups.map((group: PropertyGroup) => {
-			const props: PropHolder[] = group.properties.map(prop => {
-				// note: gotta transform nodes because some names like "image" are
-				// built-in and arent compatible with the :is directive
-				return {
-					prop: prop,
-					componentName: prop.type + "View"
-				};
-			});
-
-			// eval collapse state
-			let collapseState = true;
-			if (this.node instanceof DesignerNode) {
-				collapseState = PropGroupCache.getCollapseState(
-					(this.node as DesignerNode).typeName,
-					group.name,
-					true
-				);
-			}
-
-			return {
-				title: group.name,
-				props: props,
-				collapsed: collapseState
-			};
-		});
-	}
-
-	onGroupCollapseChange(groupName: string, state: boolean) {
-		PropGroupCache.setCollapseState(
-			(this.node as DesignerNode).typeName,
-			groupName,
-			state
-		);
-	}
-
-	get isInstanceNode() {
-		return this.node instanceof DesignerNode;
-	}
-
-	get getNode(): DesignerNode {
-		return this.node as DesignerNode;
-	}
-
-	handleScroll(evt) {
-		// console.log(evt);
-		// console.log(evt.target.scrollTop);
-		if (this.node instanceof DesignerNode) {
-			PropGroupCache.setScrollLevel(
-				(this.node as DesignerNode).typeName,
-				evt.target.scrollTop
-			);
-		}
-	}
-
-	refresh() {
-		this.$forceUpdate();
-	}
-}
-</script>
-
-<style scoped>
-.properties {
-	background: #333;
-}
-</style>
diff --git a/src/views/Preview2D.vue b/src/views/Preview2D.vue
deleted file mode 100644
index e2ceaf7f..00000000
--- a/src/views/Preview2D.vue
+++ /dev/null
@@ -1,186 +0,0 @@
-<template>
-	<div style="height:100%">
-		<div style="height:2em;">
-			<a
-				:class="{ btn: true, toggled: !hasImage }"
-				href="#"
-				@click="saveTexture()"
-				><i class="bx bx-save bx-sm"></i
-			></a>
-			<a
-				:class="{ btn: true, toggled: isTiling }"
-				href="#"
-				@click="toggleNineTexures()"
-				><i class="bx bx-grid bx-sm"></i
-			></a>
-			<a class="btn" href="#" @click="centerTexture()"
-				><i class="bx bx-exit-fullscreen bx-sm"></i
-			></a>
-		</div>
-		<canvas id="_2dpreview" ref="canvas" style="display:block;"></canvas>
-	</div>
-</template>
-
-<script>
-import { DragZoom, DrawMode } from "./preview2d/previewcanvas2d";
-import { unobserve } from "../unobserve";
-const electron = require("electron");
-const remote = require("@electron/remote");
-const { dialog, app, BrowserWindow, Menu } = remote;
-import fs from "fs";
-var nativeImage = electron.nativeImage;
-
-export default {
-	// props: {
-	//   editor: {
-	//     type: Object
-	//   }
-	// },
-	data() {
-		return {
-			node: null,
-			// HtmlCanvasElement...it will auto update when the node's image changes
-			image: null,
-			canvas: null,
-			dragZoom: null
-		};
-	},
-	mounted() {
-		let dragZoom = new DragZoom(this.$refs.canvas);
-		const draw = () => {
-			dragZoom.draw();
-			requestAnimationFrame(draw);
-		};
-
-		requestAnimationFrame(draw);
-		this.dragZoom = dragZoom;
-	},
-	methods: {
-		setEditor(editor) {
-			this.editor = unobserve(editor);
-			let self = this;
-			editor.onpreviewnode = (node, image) => {
-				self.node = unobserve(node);
-				self.image = unobserve(image);
-
-				self.dragZoom.setImage(image);
-
-				//this.paint();
-			};
-		},
-		resize(width, height) {
-			//console.log("resize");
-			fitCanvasToContainer(this.$refs.canvas);
-
-			this.dragZoom.onResize(width, height);
-
-			// repaint
-			//this.paint();
-		},
-		paint() {
-			if (!this.image) return;
-
-			let canvas = this.$refs.canvas;
-			let ctx = canvas.getContext("2d");
-
-			ctx.drawImage(this.image, 0, 0, canvas.width, canvas.height);
-		},
-		saveTexture() {
-			if (!this.hasImage) return;
-
-			let path = dialog.showSaveDialogSync(remote.getCurrentWindow(), {
-				filters: [
-					{
-						name: "PNG",
-						extensions: ["png"]
-					}
-				],
-				defaultPath: "image"
-			});
-
-			if (!path) return;
-
-			let img = this.dragZoom.image;
-			let canvas = document.createElement("canvas");
-			canvas.width = img.width;
-			canvas.height = img.height;
-			let ctx = canvas.getContext("2d");
-			ctx.drawImage(img, 0, 0);
-
-			// Get the DataUrl from the Canvas
-			// https://github.com/mattdesl/electron-canvas-to-buffer/blob/master/index.js
-			const url = canvas.toDataURL("image/png", 1);
-			const nativeImage = electron.nativeImage.createFromDataURL(url);
-			const buffer = nativeImage.toPNG();
-
-			fs.writeFile(path, buffer, function(err) {
-				//console.log(err);
-				if (err) alert("Error saving image: " + err);
-			});
-		},
-		toggleNineTexures() {
-			// todo: display nine textures instead of one to show tiling
-			if (this.dragZoom.drawMode == DrawMode.Single)
-				this.dragZoom.drawMode = DrawMode.Nine;
-			else this.dragZoom.drawMode = DrawMode.Single;
-		},
-		centerTexture() {
-			// todo: center texture in canvas
-			this.dragZoom.centerImage();
-		},
-		reset() {
-			this.dragZoom.centerImage();
-			this.dragZoom.setImage(null);
-		}
-	},
-
-	computed: {
-		isTiling() {
-			return this.dragZoom && this.dragZoom.drawMode == DrawMode.Nine;
-		},
-		hasImage() {
-			return this.dragZoom && this.dragZoom.image != null;
-		}
-	}
-};
-
-//https://stackoverflow.com/questions/10214873/make-canvas-as-wide-and-as-high-as-parent
-function fitCanvasToContainer(canvas) {
-	// Make it visually fill the positioned parent
-	canvas.style.width = "100%";
-	// 1em is the size of the top bar
-	canvas.style.height = "calc(100% - 2em)";
-	// ...then set the internal size to match
-	canvas.width = canvas.offsetWidth;
-	canvas.height = canvas.offsetHeight;
-	//canvas.height = canvas.offsetWidth;
-
-	canvas.style.width = "auto";
-	canvas.style.height = "auto";
-}
-</script>
-
-<style scoped>
-.btn {
-	text-align: center;
-	height: 1.6em;
-	/* width: 1.6em; */
-	border-radius: 2px;
-	line-height: 1.6em;
-	display: block;
-	float: left;
-	padding: 0.4em 0.4em 0.3em 0.4em;
-	margin: 0.1em;
-	text-decoration: none;
-	background: #666;
-	color: rgba(255, 255, 255, 0.7);
-}
-
-.btn:hover {
-	background: #999;
-}
-
-.toggled {
-	background: #444;
-}
-</style>
diff --git a/src/views/Preview3D.vue b/src/views/Preview3D.vue
deleted file mode 100644
index 94368b3c..00000000
--- a/src/views/Preview3D.vue
+++ /dev/null
@@ -1,403 +0,0 @@
-<template>
-	<div style="height:100%;positon:relative;">
-		<div :class="{ 'top-bar': true, 'top-bar-options': showMenu }">
-			<!-- <a class="btn" href="#" @click="setShape('sphere')">S</a>
-      <a class="btn" href="#" @click="setShape('cube')">C</a>
-      <a class="btn" href="#" @click="setShape('plane')">P</a>
-      <a class="btn" href="#" @click="setShape('cylinder')">C</a>-->
-			<!-- <select class="enum" @change="setShape" :value="shape">
-				<option value="sphere">Sphere</option>
-				<option value="cube">Cube</option>
-				<option value="plane">Plane</option>
-				<option value="cylinder">Cylinder</option>
-				<option value="load">Load..</option>
-			</select> -->
-
-			<button class="settings-btn" style="float:right;" @click="toggleMenu">
-				<i
-					v-if="!showMenu"
-					class="bx bx-cog"
-					style="font-size:1.4rem !important;"
-				></i>
-				<i v-else class="bx bx-x" style="font-size:1.4rem !important;"></i>
-			</button>
-			<!-- <select class="enum right" @change="setTiling" :value="tiling">
-				<option value="1" selected>Tiling: 1x</option>
-				<option value="2">Tiling: 2x</option>
-				<option value="3">Tiling: 3x</option>
-				<option value="4">Tiling: 4x</option>
-			</select> -->
-		</div>
-		<div style="display:flex; flex-direction:row;height:calc(100%);">
-			<canvas id="_3dpreview" ref="canvas" style="display:block;"></canvas>
-			<div v-if="showMenu" class="options-menu">
-				<div style="margin-bottom:0.3em;">
-					Model:
-				</div>
-				<div>
-					<select class="outlined-enum" @change="setShape" :value="shape">
-						<option value="sphere">Sphere</option>
-						<option value="cube">Cube</option>
-						<option value="plane">Plane</option>
-						<option value="cylinder">Cylinder</option>
-						<option value="load">Load..</option>
-					</select>
-				</div>
-				<div style="margin-bottom:0.3em;">
-					Texture Tiling:
-				</div>
-				<div>
-					<select class="outlined-enum" @change="setTiling" :value="tiling">
-						<option value="1" selected>Tiling: 1x</option>
-						<option value="2">Tiling: 2x</option>
-						<option value="3">Tiling: 3x</option>
-						<option value="4">Tiling: 4x</option>
-					</select>
-				</div>
-				<div style="margin-bottom:0.3em;">
-					Environments:
-				</div>
-				<div>
-					<div
-						v-for="(sky, i) in skies"
-						:key="i"
-						class="sky-card"
-						@click="loadSky(sky.path)"
-					>
-						<div class="sky-card-title">{{ sky.name }}</div>
-						<img
-							class=""
-							style="display:block"
-							:src="calcImagePath(sky.thumbnail)"
-						/>
-					</div>
-				</div>
-			</div>
-		</div>
-	</div>
-</template>
-
-<script>
-import { View3D } from "@/lib/view3d";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { unobserve } from "../unobserve";
-const electron = require("electron");
-const remote = require("@electron/remote");
-import path from "path";
-const { dialog, app, BrowserWindow, Menu } = remote;
-
-export default {
-	// props: {
-	//   editor: {
-	//     type: Object
-	//   }
-	// },
-	data() {
-		return {
-			view3d: null,
-			showMenu: false,
-			tiling: 1,
-			shape: "sphere",
-			skies: [
-				{
-					id: "wide_street",
-					name: "Wide Street",
-					thumbnail: "assets/env/wide_street_thumbnail.png",
-					path: "assets/env/wide_street_01_1k.hdr"
-				},
-				{
-					id: "christmas_studio",
-					name: "Christmas Studio",
-					thumbnail: "assets/env/christmas/christmas_studio_thumbnail.png",
-					path: "assets/env/christmas/christmas_photo_studio_01_1k.hdr"
-				},
-				{
-					id: "cave_wall",
-					name: "Cave Wall",
-					thumbnail: "assets/env/cave_wall/cave_wall.jpg",
-					path: "assets/env/cave_wall/cave_wall_1k.hdr"
-				},
-				{
-					id: "dresden_station_night",
-					name: "Dresden Station",
-					thumbnail:
-						"assets/env/dresden_station_night/dresden_station_night.jpg",
-					path: "assets/env/dresden_station_night/dresden_station_night_1k.hdr"
-				},
-				{
-					id: "hansaplatz",
-					name: "Hansaplatz",
-					thumbnail: "assets/env/hansaplatz/hansaplatz.jpg",
-					path: "assets/env/hansaplatz/hansaplatz_1k.hdr"
-				},
-				{
-					id: "kloppenheim_05",
-					name: "Kloppenheim",
-					thumbnail: "assets/env/kloppenheim_05/kloppenheim_05.jpg",
-					path: "assets/env/kloppenheim_05/kloppenheim_05_1k.hdr"
-				},
-				{
-					id: "modern_buildings_night",
-					name: "Modern Buildings",
-					thumbnail:
-						"assets/env/modern_buildings_night/modern_buildings_night.jpg",
-					path:
-						"assets/env/modern_buildings_night/modern_buildings_night_1k.hdr"
-				},
-				{
-					id: "snowy_park_01",
-					name: "Snowy Park",
-					thumbnail: "assets/env/snowy_park_01/snowy_park_01.jpg",
-					path: "assets/env/snowy_park_01/snowy_park_01_1k.hdr"
-				},
-				{
-					id: "spruit_sunrise",
-					name: "Spruit Sunrise",
-					thumbnail: "assets/env/spruit_sunrise/spruit_sunrise.jpg",
-					path: "assets/env/spruit_sunrise/spruit_sunrise_1k.hdr"
-				},
-				{
-					id: "studio_small_07",
-					name: "Small Studio",
-					thumbnail: "assets/env/studio_small_07/studio_small_07.jpg",
-					path: "assets/env/studio_small_07/studio_small_07_1k.hdr"
-				}
-				// {
-				// 	id: "cave_wall",
-				// 	name: "Cave Wall",
-				// 	thumbnail: "assets/env//.jpg",
-				// 	path: "assets/env//_1k.hdr"
-				// }
-			]
-		};
-	},
-	mounted() {
-		this.view3d = unobserve(new View3D());
-		this.view3d.setCanvas(this.$refs.canvas);
-	},
-	methods: {
-		setEditor(editor) {
-			this.editor = unobserve(editor);
-			let self = this;
-			// editor.onpreviewnode = (node, image) => {
-			//   self.node = node;
-			//   self.image = image;
-
-			//   this.paint();
-			// };
-
-			editor.ontexturechannelcleared = (imageCanvas, channelName) => {
-				this.view3d.clearTexture(channelName);
-			};
-
-			editor.ontexturechannelassigned = (imageCanvas, channelName) => {
-				this.view3d.setTexture(imageCanvas, channelName);
-			};
-
-			editor.ontexturechannelupdated = (imageCanvas, channelName) => {
-				this.view3d.updateTexture(channelName);
-			};
-		},
-		resize(width, height) {
-			fitCanvasToContainer(this.$refs.canvas, this.showMenu);
-
-			// repaint
-			if (this.view3d)
-				this.view3d.resize(this.$refs.canvas.width, this.$refs.canvas.height);
-		},
-		setShape(evt) {
-			// todo: set 3d model
-			// console.log("set model: ", evt.target.value);
-			if (evt.target.value !== "load") {
-				this.view3d.setModel(evt.target.value);
-				this.shape = evt.target.value;
-			} else {
-				let paths = dialog.showOpenDialogSync(remote.getCurrentWindow(), {
-					filters: [
-						{
-							name: "Obj or FBX Model",
-							extensions: ["obj", "fbx"]
-						}
-					],
-					defaultPath: ""
-				});
-
-				if (paths && paths.length > 0) {
-					const path = paths[0];
-					this.view3d.loadModel(path);
-					this.shape = null;
-				}
-			}
-		},
-		setTiling(evt) {
-			// todo: set 3d model
-			this.tiling = parseInt(evt.target.value);
-			this.view3d.setRepeat(parseInt(evt.target.value));
-			//this.$forceUpdate();
-		},
-		toggleMenu() {
-			console.log("toggle menu");
-			this.showMenu = !this.showMenu;
-
-			// recalc after render
-			this.$nextTick(() => {
-				fitCanvasToContainer(this.$refs.canvas, this.showMenu);
-
-				if (this.view3d)
-					this.view3d.resize(this.$refs.canvas.width, this.$refs.canvas.height);
-			});
-		},
-		reset() {
-			// clear all textures
-			// reset camera position
-			this.view3d.reset();
-		},
-		calcImagePath(image) {
-			//return `./assets/nodes/${node}.png`;
-			if (process.env.NODE_ENV == "production")
-				return "file://" + path.join(process.env.BASE_URL, image);
-			return path.join(process.env.BASE_URL, image);
-		},
-		loadSky(path) {
-			this.view3d.setSkyPath(path);
-		}
-	}
-};
-
-//https://stackoverflow.com/questions/10214873/make-canvas-as-wide-and-as-high-as-parent
-function fitCanvasToContainer(canvas, showMenu) {
-	// Make it visually fill the positioned parent
-	if (showMenu) canvas.style.width = "60%";
-	else canvas.style.width = "100%";
-
-	// 1em is the size of the top bar
-	canvas.style.height = "calc(100%)";
-	// ...then set the internal size to match
-	canvas.width = canvas.offsetWidth;
-	canvas.height = canvas.offsetHeight;
-	//canvas.height = canvas.offsetWidth;
-
-	canvas.style.width = "auto";
-	canvas.style.height = "auto";
-}
-</script>
-
-<style scoped>
-.btn {
-	text-align: center;
-	height: 1.6em;
-	width: 1.6em;
-	line-height: 1.6em;
-	display: block;
-	float: left;
-	padding: 0.1em;
-	margin: 0.1em;
-	text-decoration: none;
-	background: #666;
-	color: rgba(255, 255, 255, 0.7);
-}
-
-.btn:hover {
-	background: #999;
-}
-
-.enum {
-	outline: 0;
-	box-shadow: none;
-	border: 0 !important;
-
-	border: none;
-	border-radius: 4px;
-	color: white;
-	background: #222;
-	padding: 0.5em;
-	font-family: "Open Sans";
-}
-
-.settings-btn {
-	outline: 0;
-	box-shadow: none;
-	border: 0 !important;
-
-	border: none;
-	border-radius: 4px;
-	color: white;
-	background: #222;
-	padding: 0.5em;
-	font-family: "Open Sans";
-	cursor: pointer;
-
-	box-shadow: #00000047 0px 2px 2px;
-}
-
-.outlined-enum {
-	outline: 0;
-	box-shadow: none;
-	border: 0 !important;
-
-	border-radius: 4px;
-	color: white;
-	background: #404040;
-	padding: 0.5em;
-	font-family: "Open Sans";
-
-	width: 100%;
-}
-
-.right {
-	float: right;
-}
-
-.options-menu {
-	color: white;
-	display: block;
-	width: 40%;
-	background: #212121;
-	padding: 0.5rem;
-	overflow-y: scroll;
-	box-sizing: border-box;
-	font-size: 12px;
-	font-weight: bold;
-}
-
-.top-bar {
-	padding: 5px;
-	background: transparent;
-	position: absolute;
-	top: 0;
-	box-sizing: border-box;
-	width: 100%;
-}
-
-.top-bar-options {
-	width: 60%;
-}
-
-.sky-card {
-	cursor: pointer;
-	color: white;
-
-	padding: 0.4em;
-	background: #404040;
-	border-radius: 3px;
-
-	margin-bottom: 0.3em;
-}
-
-.sky-card:hover {
-	background: #626262;
-}
-
-.sky-card img {
-	border-radius: 3px;
-	width: 100%;
-}
-
-.sky-card-title {
-	margin-bottom: 0.5em;
-}
-
-.sky-selected {
-	border: solid #a2e4ff 2px;
-}
-</style>
diff --git a/src/views/TextureVariables.vue b/src/views/TextureVariables.vue
deleted file mode 100644
index 60cadb41..00000000
--- a/src/views/TextureVariables.vue
+++ /dev/null
@@ -1,66 +0,0 @@
-<template>
-	<form class="ui form">
-		<component
-			v-for="(p, index) in this.properties"
-			:is="p.componentName"
-			:prop="p.var.property"
-			:node="node"
-			:editor="editor"
-			@propertyChanged="propertyChanged"
-			:key="index"
-		></component>
-	</form>
-</template>
-
-<script lang="ts">
-import { Vue, Model, Prop, Component } from "vue-property-decorator";
-import FloatVariableView from "@/components/variables/FloatVar.vue";
-import BoolVariableView from "@/components/variables/BoolVar.vue";
-import EnumVariableView from "@/components/variables/EnumVar.vue";
-import ColorVariableView from "@/components/variables/ColorVar.vue";
-import { Editor } from "@/lib/editor";
-import { DesignerVariable } from "@/lib/designer/designervariable";
-import { DesignerNode } from "@/lib/designer/designernode";
-import { Designer } from "@/lib/designer";
-
-class VarHolder {
-	var: DesignerVariable;
-	componentName: string;
-}
-
-@Component({
-	components: {
-		float: FloatVariableView,
-		int: FloatVariableView,
-		bool: BoolVariableView,
-		enum: EnumVariableView,
-		color: ColorVariableView
-	}
-})
-export default class TextureVariablesView extends Vue {
-	@Prop()
-	node: DesignerNode;
-
-	@Prop()
-	designer: Designer;
-
-	propertyChanged(propName: string) {
-		// if (this.editor.onnodepropertychanged)
-		//   this.editor.onnodepropertychanged(self.node, prop);
-	}
-
-	// calculated
-	get properties(): VarHolder[] {
-		let vars: VarHolder[] = this.designer.variables.map(v => {
-			let name: string = "";
-			return {
-				var: v,
-				componentName: name
-			};
-		});
-
-		//console.log(vars);
-		return vars;
-	}
-}
-</script>
diff --git a/src/views/dialogs/ExportDialog.vue b/src/views/dialogs/ExportDialog.vue
deleted file mode 100644
index 8ffd19cb..00000000
--- a/src/views/dialogs/ExportDialog.vue
+++ /dev/null
@@ -1,212 +0,0 @@
-<template>
-	<vue-final-modal
-		:value="exportMenuVisible"
-		classes="modal-container"
-		content-class="modal-content"
-	>
-		<button class="modal__close" @click="hideExportMenu()">
-			<i class="bx bx-x" style="font-size:1.4rem !important;"></i>
-		</button>
-		<span class="modal__title">Export Settings</span>
-		<!-- <div>
-					<span>Output Type</span>
-					<select>
-						<option value="zip">Zip</option>
-						<option value="folder">Folder</option>
-					</select>
-				</div> -->
-		<div class="modal__content">
-			<div class="prop-container">
-				<span class="prop-title">Destination:</span><br />
-				<span>{{ exportDestination }}</span
-				><a
-					class="small-button"
-					href="#"
-					v-if="exportDestination"
-					@click="chooseExportDestination()"
-				>
-					...
-				</a>
-				<a
-					class="small-button"
-					href="#"
-					v-else
-					@click="chooseExportDestination()"
-				>
-					Choose Folder
-				</a>
-			</div>
-			<div class="prop-container">
-				<span class="prop-title">Pattern:</span><br />
-				<div>
-					<input
-						class="text-input"
-						:value="exportPattern"
-						@change="onExportPatternChanged"
-					/>
-					<a class="small-button" href="#" @click="resetExportPattern()"
-						>reset</a
-					>
-				</div>
-				<div style="font-size:0.7em;">
-					${project} - Project Name <br />
-					${name} - Output Node Name <br />
-				</div>
-			</div>
-			<div>
-				<a
-					class="button"
-					style="float:right;margin-top:1em;"
-					href="#"
-					@click="exportTextures()"
-				>
-					Export
-				</a>
-			</div>
-		</div>
-	</vue-final-modal>
-</template>
-
-<style scoped>
-::v-deep .modal-container {
-	display: flex;
-	justify-content: center;
-	align-items: center;
-	background: rgba(0, 0, 0, 0.5);
-}
-::v-deep .modal-content {
-	position: relative;
-	display: flex;
-	flex-direction: column;
-	margin: 0 1rem;
-	padding: 1rem;
-	/* border: 1px solid #e2e8f0; */
-	border-radius: 0.25rem;
-	background: #333;
-	color: white;
-	min-width: 300px;
-}
-.modal__title {
-	margin: 0 2rem 0 0;
-	font-size: 1.5rem;
-	font-weight: 700;
-}
-.modal__close {
-	position: absolute;
-	top: 0.5rem;
-	right: 0.5rem;
-}
-
-.button {
-	border-radius: 2px;
-	background: #666;
-	padding: 0.5em 1em;
-	text-decoration: none;
-	color: white;
-	vertical-align: middle;
-	margin-right: 0.5em;
-}
-
-.small-button {
-	border-radius: 2px;
-	background: #666;
-	padding: 0.2em 0.5em;
-	text-decoration: none;
-	color: white;
-	vertical-align: middle;
-	margin-right: 0.5em;
-}
-
-.prop-container {
-	margin-top: 0.5em;
-}
-
-.prop-title {
-	font-size: 0.8em;
-}
-
-.text-input {
-	padding: 0.4em;
-	border: solid white 1px;
-	border-radius: 2px;
-	margin-right: 1em;
-}
-</style>
-
-<script lang="ts">
-import { Component, Prop, Vue, Watch, Model } from "vue-property-decorator";
-import VfmPlugin from "vue-final-modal";
-import { Exporter, ExportSettings, OutputType } from "@/export";
-import { dialog, shell } from "@electron/remote";
-import { Project } from "@/lib/project";
-import { Editor } from "@/lib/editor";
-const remote = require("@electron/remote");
-
-@Component({})
-export default class ExportDialog extends Vue {
-	@Prop()
-	exportMenuVisible: boolean = false;
-
-	exportDestination: string = null;
-
-	@Prop()
-	exportPattern: string = "${project}_${name}";
-	// use channel name when no export name is present
-	// this is a fallback for existing textures made prior
-	// to the new export system
-	exportUseChannelName: boolean = false;
-
-	@Prop()
-	project: Project;
-
-	@Prop()
-	editor: Editor;
-
-	mounted() {
-		console.log("export dialog mounted");
-	}
-
-	public created(): void {
-		// alert("mounted!");
-		console.log("mounted");
-		// this.exportMenuVisible = false;
-	}
-
-	showExportMenu() {
-		this.$emit("show");
-		// this.exportMenuVisible = true;
-	}
-
-	hideExportMenu() {
-		this.$emit("hide");
-		// this.exportMenuVisible = false;
-	}
-
-	onExportPatternChanged(event: MouseEvent) {
-		// this.exportPattern = value;
-		this.$emit(
-			"exportPatternChanged",
-			(event.target as HTMLInputElement).value
-		);
-	}
-
-	chooseExportDestination() {
-		let path = dialog.showOpenDialogSync(remote.getCurrentWindow(), {
-			properties: ["openDirectory", "createDirectory"]
-		});
-
-		console.log(path);
-		if (path && path.length > 0) {
-			this.exportDestination = path[0];
-		}
-	}
-
-	resetExportPattern() {
-		this.exportPattern = "${project}_${name}";
-	}
-
-	exportTextures() {
-		this.$emit("exportTextures");
-	}
-}
-</script>
diff --git a/src/views/preview2d/previewcanvas2d.ts b/src/views/preview2d/previewcanvas2d.ts
deleted file mode 100644
index 71295e80..00000000
--- a/src/views/preview2d/previewcanvas2d.ts
+++ /dev/null
@@ -1,338 +0,0 @@
-const IMAGE_RENDER_SIZE = 1000;
-
-function _getMousePos(canvas, evt) {
-	const rect = canvas.getBoundingClientRect();
-	return new Vector2(evt.clientX - rect.left, evt.clientY - rect.top);
-}
-
-class Vector2 {
-	x: number;
-	y: number;
-
-	constructor(x: number, y: number) {
-		this.x = x;
-		this.y = y;
-	}
-}
-
-export enum DrawMode {
-	Single,
-	Nine
-}
-
-class Rect {
-	protected visible = true;
-
-	protected x = 0;
-	protected y = 0;
-	protected width: number;
-	protected height: number;
-
-	color: string;
-
-	public constructor() {
-		//this.scene = scene;
-		//scene.addItem(this);
-		this.width = 1;
-		this.height = 1;
-		this.color = "rgb(255, 50, 50)";
-	}
-
-	public setSize(w: number, h: number) {
-		this.width = w;
-		this.height = h;
-	}
-
-	public isPointInside(px: number, py: number): boolean {
-		if (
-			px >= this.x &&
-			px <= this.x + this.width &&
-			py >= this.y &&
-			py <= this.y + this.height
-		)
-			return true;
-		return false;
-	}
-
-	public setCenter(x: number, y: number) {
-		this.x = x - this.width / 2;
-		this.y = y - this.height / 2;
-	}
-
-	public centerX(): number {
-		return this.x + this.width / 2;
-	}
-
-	public centerY(): number {
-		return this.y + this.height / 2;
-	}
-
-	public move(dx: number, dy: number) {
-		this.x += dx;
-		this.y += dy;
-	}
-
-	// to be overriden
-	draw(ctx: CanvasRenderingContext2D) {
-		// background
-		ctx.beginPath();
-		ctx.fillStyle = this.color;
-		ctx.rect(this.x, this.y, this.width, this.height);
-		ctx.fill();
-
-		// border
-		ctx.beginPath();
-		ctx.lineWidth = 4;
-		ctx.strokeStyle = "rgb(0, 0, 0)";
-		ctx.rect(this.x, this.y, this.width, this.height);
-		ctx.stroke();
-	}
-}
-
-export class DragZoom {
-	canvas: HTMLCanvasElement;
-	context: CanvasRenderingContext2D;
-
-	mousePos: Vector2;
-	prevMousePos: Vector2;
-	mouseDownPos: Vector2; // pos of last mouse down
-	mouseDragDiff: Vector2; // mouse drag diff
-
-	zoomFactor: number;
-	offset: Vector2;
-
-	panning: boolean;
-	panStart: SVGPoint;
-
-	rect: Rect;
-	image: HTMLCanvasElement;
-
-	public drawMode: DrawMode;
-
-	constructor(canvas: HTMLCanvasElement) {
-		this.canvas = canvas;
-		this.context = this.canvas.getContext("2d");
-		this.image = null;
-
-		const self = this;
-		canvas.addEventListener("mousemove", function(evt: MouseEvent) {
-			self.onMouseMove(evt);
-		});
-		canvas.addEventListener("mousedown", function(evt: MouseEvent) {
-			self.onMouseDown(evt);
-		});
-		canvas.addEventListener("mouseup", function(evt: MouseEvent) {
-			self.onMouseUp(evt);
-		});
-		canvas.addEventListener("mouseout", function(evt: MouseEvent) {
-			self.onMouseOut(evt);
-		});
-		canvas.addEventListener("mousewheel", function(evt: WheelEvent) {
-			self.onMouseScroll(evt);
-		});
-		canvas.addEventListener("contextmenu", function(evt: MouseEvent) {
-			evt.preventDefault();
-		});
-		canvas.addEventListener("resize", function(evt: MouseEvent) {});
-
-		this.drawMode = DrawMode.Single;
-
-		// this.zoomFactor = 1;
-		this.zoomFactor = 0.4;
-		this.offset = new Vector2(0, 0);
-
-		this.mousePos = new Vector2(0, 0);
-
-		this.rect = new Rect();
-		this.rect.setSize(50, 50);
-
-		// offset to put center(0,0) in middle of view
-		this.offset = new Vector2(canvas.width * 0.5, canvas.height * 0.5);
-	}
-
-	onResize(width: number, height: number) {
-		this.offset = new Vector2(width * 0.5, height * 0.5);
-	}
-
-	// puts image in center and set appropriate zoom level
-	centerImage() {
-		this.offset = new Vector2(
-			this.canvas.width * 0.5,
-			this.canvas.height * 0.5
-		);
-		this.zoomFactor = 0.4;
-	}
-
-	setImage(image: HTMLCanvasElement) {
-		this.image = image;
-
-		// center image in view
-	}
-
-	getAbsPos() {
-		return new Vector2(this.canvas.offsetLeft, this.canvas.offsetTop);
-	}
-
-	onMouseDown(evt: MouseEvent) {
-		if (evt.button == 1 || evt.button == 2) {
-			this.panning = true;
-
-			this.mouseDownPos = _getMousePos(this.canvas, evt);
-		}
-
-		this.mousePos = _getMousePos(this.canvas, evt);
-	}
-
-	onMouseUp(evt: MouseEvent) {
-		// this.mouseX = pos.x;
-		// this.mouseY = pos.y;
-		if (evt.button == 1 || evt.button == 2) {
-			this.panning = false;
-		}
-	}
-
-	onMouseMove(evt: MouseEvent) {
-		this.prevMousePos = this.mousePos;
-		this.mousePos = _getMousePos(this.canvas, evt);
-
-		if (this.panning) {
-			const prev = this.canvasToScene(this.prevMousePos);
-			const cur = this.canvasToScene(this.mousePos);
-			const diff = new Vector2(prev.x - cur.x, prev.y - cur.y);
-			// const diff = new Vector2(this.prevMousePos.x - this.mousePos.x, this.prevMousePos.y - this.mousePos.y);
-
-			const factor = this.zoomFactor;
-			this.offset.x -= diff.x * factor;
-			this.offset.y -= diff.y * factor;
-		}
-
-		// var lastX = this.mouseX;
-		// var lastY = this.mouseY;
-		// var pos = this.getScenePos(evt);
-		// this.mouseX = pos.x;
-		// this.mouseY = pos.y;
-
-		// if (this.panning) {
-		//     // convert to scene space first
-		//     //var lastPt = this.contextExtra.transformedPoint(lastX, lastY);
-		//     //var pt = this.contextExtra.transformedPoint(this.mouseX, this.mouseY);
-		//     //this.context.translate(pt.x - lastPt.x, pt.y - lastPt.y);
-		//     //console.log(pt.x - this.panStart.x, pt.y - this.panStart.y);
-		//     console.log(this.mouseX - this.panStart.x, this.mouseY - this.panStart.y);
-		//     this.context.translate(this.mouseX - this.panStart.x, this.mouseY - this.panStart.y);
-		//     //this.panStart = pos;
-		// }
-	}
-
-	onMouseScroll(evt: WheelEvent) {
-		// no panning while zooming
-		if (this.panning) return;
-
-		const pos = _getMousePos(this.canvas, evt);
-		const delta = (<any>evt).wheelDelta > 0 ? 1.1 : 1.0 / 1.1;
-
-		// offset from mouse pos
-		// find offset from previous zoom then move offset by that value
-
-		this.zoomFactor *= delta;
-		this.offset.x = pos.x - (pos.x - this.offset.x) * delta; // * (factor);
-		this.offset.y = pos.y - (pos.y - this.offset.y) * delta; // * (factor);
-
-		//this.zoom(pos.x, pos.y, delta);
-
-		evt.preventDefault();
-		return false;
-	}
-
-	onMouseOut(evt: MouseEvent) {
-		// cancel panning
-		this.panning = false;
-	}
-
-	zoom(x: number, y: number, level: number) {
-		// var scaleFactor = 1.01;
-		// var pt = this.contextExtra.transformedPoint(x,y);
-		// var factor = Math.pow(scaleFactor, level);
-	}
-
-	draw() {
-		const ctx = this.context;
-
-		ctx.setTransform(1, 0, 0, 1, 0, 0);
-		ctx.fillStyle = "rgb(50,50,50)";
-		ctx.fillRect(0, 0, this.canvas.width, this.canvas.height);
-
-		//ctx.scale(this.zoomFactor, this.zoomFactor);
-		//ctx.translate(this.offset.x, this.offset.y);
-
-		ctx.setTransform(
-			this.zoomFactor,
-			0,
-			0,
-			this.zoomFactor,
-			this.offset.x,
-			this.offset.y
-		);
-
-		// ctx.translate(this.offset.x, this.offset.y);
-		// ctx.scale(this.zoomFactor, this.zoomFactor);
-
-		// highlight rect if mouse over
-		const scenePos = this.canvasToScene(this.mousePos);
-		//console.log(scenePos);
-		if (this.rect.isPointInside(scenePos.x, scenePos.y)) {
-			this.rect.color = "rgb(0, 255, 255)";
-		} else {
-			this.rect.color = "rgb(255, 50, 50)";
-		}
-
-		if (this.image) {
-			if (this.drawMode == DrawMode.Single) {
-				this.drawImage(0, 0);
-			} else {
-				// top
-				this.drawImage(-1, -1);
-				this.drawImage(0, -1);
-				this.drawImage(1, -1);
-
-				// middle
-				this.drawImage(-1, 0);
-				this.drawImage(0, 0);
-				this.drawImage(1, 0);
-
-				// bottom
-				this.drawImage(-1, 1);
-				this.drawImage(0, 1);
-				this.drawImage(1, 1);
-			}
-
-			//   this.context.lineWidth = 5;
-			//   this.context.strokeRect(
-			//     -IMAGE_RENDER_SIZE * 0.5,
-			//     -IMAGE_RENDER_SIZE * 0.5,
-			//     IMAGE_RENDER_SIZE,
-			//     IMAGE_RENDER_SIZE
-			//   );
-		}
-	}
-
-	drawImage(offsetX: number, offsetY: number) {
-		this.context.drawImage(
-			this.image,
-			-IMAGE_RENDER_SIZE * 0.5 + offsetX * IMAGE_RENDER_SIZE,
-			-IMAGE_RENDER_SIZE * 0.5 + offsetY * IMAGE_RENDER_SIZE,
-			IMAGE_RENDER_SIZE,
-			IMAGE_RENDER_SIZE
-		);
-	}
-
-	// converts from canvas(screen) coords to the scene(world) coords
-	canvasToScene(pos: Vector2): Vector2 {
-		//return new Vector2(pos.x * (1.0 / this.zoomFactor) - this.offset.x, pos.y * (1.0 / this.zoomFactor) - this.offset.y);
-		return new Vector2(
-			(pos.x - this.offset.x) * (1.0 / this.zoomFactor),
-			(pos.y - this.offset.y) * (1.0 / this.zoomFactor)
-		);
-		//return new Vector2(pos.x *  this.zoomFactor - this.offset.x, pos.y * this.zoomFactor - this.offset.y);
-	}
-}
diff --git a/tests/unit/.eslintrc.js b/tests/unit/.eslintrc.js
deleted file mode 100644
index 84d2cc9d..00000000
--- a/tests/unit/.eslintrc.js
+++ /dev/null
@@ -1,5 +0,0 @@
-module.exports = {
-	env: {
-		jest: true
-	}
-};
diff --git a/tests/unit/example.spec.ts b/tests/unit/example.spec.ts
deleted file mode 100644
index 33601366..00000000
--- a/tests/unit/example.spec.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { shallowMount } from "@vue/test-utils";
-import HelloWorld from "@/components/HelloWorld.vue";
-
-describe("HelloWorld.vue", () => {
-	it("renders props.msg when passed", () => {
-		const msg = "new message";
-		const wrapper = shallowMount(HelloWorld, {
-			propsData: { msg }
-		});
-		expect(wrapper.text()).toMatch(msg);
-	});
-});
diff --git a/tsconfig.json b/tsconfig.json
deleted file mode 100644
index b42c6cd6..00000000
--- a/tsconfig.json
+++ /dev/null
@@ -1,28 +0,0 @@
-{
-	"compilerOptions": {
-		"target": "es6",
-		"module": "esnext",
-		"strict": false,
-		"jsx": "preserve",
-		"importHelpers": true,
-		"moduleResolution": "node",
-		"experimentalDecorators": true,
-		"esModuleInterop": true,
-		"allowSyntheticDefaultImports": true,
-		"sourceMap": true,
-		"baseUrl": ".",
-		"types": ["webpack-env", "jest"],
-		"paths": {
-			"@/*": ["src/*"]
-		},
-		"lib": ["esnext", "dom", "dom.iterable", "scripthost", "es5", "es6"]
-	},
-	"include": [
-		"src/**/*.ts",
-		"src/**/*.tsx",
-		"src/**/*.vue",
-		"tests/**/*.ts",
-		"tests/**/*.tsx"
-	],
-	"exclude": ["node_modules"]
-}
diff --git a/vue.config.js b/vue.config.js
deleted file mode 100644
index 08b10752..00000000
--- a/vue.config.js
+++ /dev/null
@@ -1,25 +0,0 @@
-// vue.config.js
-
-module.exports = {
-	pluginOptions: {
-		electronBuilder: {
-			chainWebpackMainProcess: config => {
-				config.plugins.delete("uglify");
-			},
-			chainWebpackRendererProcess: config => {
-				config.plugins.delete("uglify");
-			},
-			builderOptions: {
-				win: {
-					icon: "build/icons/win/icon.ico"
-				},
-				linux: {
-					icon: "build/icons/png/512x512.png"
-				},
-				mac: {
-					icon: "build/icons/mac/icon.icns"
-				}
-			}
-		}
-	}
-};
diff --git a/yarn.lock b/yarn.lock
deleted file mode 100644
index 1d67598e..00000000
--- a/yarn.lock
+++ /dev/null
@@ -1,13477 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
-"7zip-bin@~5.0.3":
-  version "5.0.3"
-  resolved "https://registry.yarnpkg.com/7zip-bin/-/7zip-bin-5.0.3.tgz#bc5b5532ecafd923a61f2fb097e3b108c0106a3f"
-  integrity sha512-GLyWIFBbGvpKPGo55JyRZAo4lVbnBiD52cKlw/0Vt+wnmKvWJkpZvsjVoaIolyBXDeAQKSicRtqFNPem9w0WYA==
-
-"@babel/code-frame@^7.0.0", "@babel/code-frame@^7.0.0-beta.35", "@babel/code-frame@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.10.4.tgz#168da1a36e90da68ae8d49c0f1b48c7c6249213a"
-  integrity sha512-vG6SvB6oYEhvgisZNFRmRCUkLz11c7rp+tbNTynGqc6mS1d5ATd/sGyV6W0KZZnXRKMTzZDRgQT3Ou9jhpAfUg==
-  dependencies:
-    "@babel/highlight" "^7.10.4"
-
-"@babel/core@^7.0.0":
-  version "7.10.5"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.10.5.tgz#1f15e2cca8ad9a1d78a38ddba612f5e7cdbbd330"
-  integrity sha512-O34LQooYVDXPl7QWCdW9p4NR+QlzOr7xShPPJz8GsuCU3/8ua/wqTr7gmnxXv+WBESiGU/G5s16i6tUvHkNb+w==
-  dependencies:
-    "@babel/code-frame" "^7.10.4"
-    "@babel/generator" "^7.10.5"
-    "@babel/helper-module-transforms" "^7.10.5"
-    "@babel/helpers" "^7.10.4"
-    "@babel/parser" "^7.10.5"
-    "@babel/template" "^7.10.4"
-    "@babel/traverse" "^7.10.5"
-    "@babel/types" "^7.10.5"
-    convert-source-map "^1.7.0"
-    debug "^4.1.0"
-    gensync "^1.0.0-beta.1"
-    json5 "^2.1.2"
-    lodash "^4.17.19"
-    resolve "^1.3.2"
-    semver "^5.4.1"
-    source-map "^0.5.0"
-
-"@babel/generator@^7.10.5":
-  version "7.10.5"
-  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.10.5.tgz#1b903554bc8c583ee8d25f1e8969732e6b829a69"
-  integrity sha512-3vXxr3FEW7E7lJZiWQ3bM4+v/Vyr9C+hpolQ8BGFr9Y8Ri2tFLWTixmwKBafDujO1WVah4fhZBeU1bieKdghig==
-  dependencies:
-    "@babel/types" "^7.10.5"
-    jsesc "^2.5.1"
-    source-map "^0.5.0"
-
-"@babel/helper-annotate-as-pure@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.10.4.tgz#5bf0d495a3f757ac3bda48b5bf3b3ba309c72ba3"
-  integrity sha512-XQlqKQP4vXFB7BN8fEEerrmYvHp3fK/rBkRFz9jaJbzK0B1DSfej9Kc7ZzE8Z/OnId1jpJdNAZ3BFQjWG68rcA==
-  dependencies:
-    "@babel/types" "^7.10.4"
-
-"@babel/helper-builder-binary-assignment-operator-visitor@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.10.4.tgz#bb0b75f31bf98cbf9ff143c1ae578b87274ae1a3"
-  integrity sha512-L0zGlFrGWZK4PbT8AszSfLTM5sDU1+Az/En9VrdT8/LmEiJt4zXt+Jve9DCAnQcbqDhCI+29y/L93mrDzddCcg==
-  dependencies:
-    "@babel/helper-explode-assignable-expression" "^7.10.4"
-    "@babel/types" "^7.10.4"
-
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-  version "7.10.5"
-  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.10.5.tgz#9f61446ba80e8240b0a5c85c6fdac8459d6f259d"
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-  dependencies:
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-    "@babel/helper-member-expression-to-functions" "^7.10.5"
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-    "@babel/helper-plugin-utils" "^7.10.4"
-    "@babel/helper-replace-supers" "^7.10.4"
-    "@babel/helper-split-export-declaration" "^7.10.4"
-
-"@babel/helper-create-regexp-features-plugin@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.10.4.tgz#fdd60d88524659a0b6959c0579925e425714f3b8"
-  integrity sha512-2/hu58IEPKeoLF45DBwx3XFqsbCXmkdAay4spVr2x0jYgRxrSNp+ePwvSsy9g6YSaNDcKIQVPXk1Ov8S2edk2g==
-  dependencies:
-    "@babel/helper-annotate-as-pure" "^7.10.4"
-    "@babel/helper-regex" "^7.10.4"
-    regexpu-core "^4.7.0"
-
-"@babel/helper-define-map@^7.10.4":
-  version "7.10.5"
-  resolved "https://registry.yarnpkg.com/@babel/helper-define-map/-/helper-define-map-7.10.5.tgz#b53c10db78a640800152692b13393147acb9bb30"
-  integrity sha512-fMw4kgFB720aQFXSVaXr79pjjcW5puTCM16+rECJ/plGS+zByelE8l9nCpV1GibxTnFVmUuYG9U8wYfQHdzOEQ==
-  dependencies:
-    "@babel/helper-function-name" "^7.10.4"
-    "@babel/types" "^7.10.5"
-    lodash "^4.17.19"
-
-"@babel/helper-explode-assignable-expression@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.10.4.tgz#40a1cd917bff1288f699a94a75b37a1a2dbd8c7c"
-  integrity sha512-4K71RyRQNPRrR85sr5QY4X3VwG4wtVoXZB9+L3r1Gp38DhELyHCtovqydRi7c1Ovb17eRGiQ/FD5s8JdU0Uy5A==
-  dependencies:
-    "@babel/traverse" "^7.10.4"
-    "@babel/types" "^7.10.4"
-
-"@babel/helper-function-name@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.10.4.tgz#d2d3b20c59ad8c47112fa7d2a94bc09d5ef82f1a"
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-    "@babel/helper-get-function-arity" "^7.10.4"
-    "@babel/template" "^7.10.4"
-    "@babel/types" "^7.10.4"
-
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-  version "7.10.4"
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-  dependencies:
-    "@babel/types" "^7.10.4"
-
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-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-hoist-variables/-/helper-hoist-variables-7.10.4.tgz#d49b001d1d5a68ca5e6604dda01a6297f7c9381e"
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-    "@babel/types" "^7.10.4"
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-  version "7.10.5"
-  resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.10.5.tgz#172f56e7a63e78112f3a04055f24365af702e7ee"
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-  dependencies:
-    "@babel/types" "^7.10.5"
-
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-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.10.4.tgz#4c5c54be04bd31670a7382797d75b9fa2e5b5620"
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-  dependencies:
-    "@babel/types" "^7.10.4"
-
-"@babel/helper-module-transforms@^7.10.4", "@babel/helper-module-transforms@^7.10.5":
-  version "7.10.5"
-  resolved "https://registry.yarnpkg.com/@babel/helper-module-transforms/-/helper-module-transforms-7.10.5.tgz#120c271c0b3353673fcdfd8c053db3c544a260d6"
-  integrity sha512-4P+CWMJ6/j1W915ITJaUkadLObmCRRSC234uctJfn/vHrsLNxsR8dwlcXv9ZhJWzl77awf+mWXSZEKt5t0OnlA==
-  dependencies:
-    "@babel/helper-module-imports" "^7.10.4"
-    "@babel/helper-replace-supers" "^7.10.4"
-    "@babel/helper-simple-access" "^7.10.4"
-    "@babel/helper-split-export-declaration" "^7.10.4"
-    "@babel/template" "^7.10.4"
-    "@babel/types" "^7.10.5"
-    lodash "^4.17.19"
-
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-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.10.4.tgz#50dc96413d594f995a77905905b05893cd779673"
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-    "@babel/types" "^7.10.4"
-
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-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.10.4.tgz#2f75a831269d4f677de49986dff59927533cf375"
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-  resolved "https://registry.yarnpkg.com/@babel/helper-regex/-/helper-regex-7.10.5.tgz#32dfbb79899073c415557053a19bd055aae50ae0"
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-  dependencies:
-    lodash "^4.17.19"
-
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-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.10.4.tgz#fce8bea4e9690bbe923056ded21e54b4e8b68ed5"
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-  dependencies:
-    "@babel/helper-annotate-as-pure" "^7.10.4"
-    "@babel/helper-wrap-function" "^7.10.4"
-    "@babel/template" "^7.10.4"
-    "@babel/traverse" "^7.10.4"
-    "@babel/types" "^7.10.4"
-
-"@babel/helper-replace-supers@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.10.4.tgz#d585cd9388ea06e6031e4cd44b6713cbead9e6cf"
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-    "@babel/helper-optimise-call-expression" "^7.10.4"
-    "@babel/traverse" "^7.10.4"
-    "@babel/types" "^7.10.4"
-
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-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.10.4.tgz#0f5ccda2945277a2a7a2d3a821e15395edcf3461"
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-  dependencies:
-    "@babel/template" "^7.10.4"
-    "@babel/types" "^7.10.4"
-
-"@babel/helper-split-export-declaration@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.10.4.tgz#2c70576eaa3b5609b24cb99db2888cc3fc4251d1"
-  integrity sha512-pySBTeoUff56fL5CBU2hWm9TesA4r/rOkI9DyJLvvgz09MB9YtfIYe3iBriVaYNaPe+Alua0vBIOVOLs2buWhg==
-  dependencies:
-    "@babel/types" "^7.10.4"
-
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-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.4.tgz#a78c7a7251e01f616512d31b10adcf52ada5e0d2"
-  integrity sha512-3U9y+43hz7ZM+rzG24Qe2mufW5KhvFg/NhnNph+i9mgCtdTCtMJuI1TMkrIUiK7Ix4PYlRF9I5dhqaLYA/ADXw==
-
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-    y18n "^3.2.1"
-    yargs-parser "^4.2.0"
-
-yauzl@^2.10.0:
-  version "2.10.0"
-  resolved "https://registry.yarnpkg.com/yauzl/-/yauzl-2.10.0.tgz#c7eb17c93e112cb1086fa6d8e51fb0667b79a5f9"
-  integrity sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=
-  dependencies:
-    buffer-crc32 "~0.2.3"
-    fd-slicer "~1.1.0"
-
-yorkie@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/yorkie/-/yorkie-2.0.0.tgz#92411912d435214e12c51c2ae1093e54b6bb83d9"
-  integrity sha512-jcKpkthap6x63MB4TxwCyuIGkV0oYP/YRyuQU5UO0Yz/E/ZAu+653/uov+phdmO54n6BcvFRyyt0RRrWdN2mpw==
-  dependencies:
-    execa "^0.8.0"
-    is-ci "^1.0.10"
-    normalize-path "^1.0.0"
-    strip-indent "^2.0.0"
-
-zip-stream@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/zip-stream/-/zip-stream-1.2.0.tgz#a8bc45f4c1b49699c6b90198baacaacdbcd4ba04"
-  integrity sha1-qLxF9MG0lpnGuQGYuqyqzbzUugQ=
-  dependencies:
-    archiver-utils "^1.3.0"
-    compress-commons "^1.2.0"
-    lodash "^4.8.0"
-    readable-stream "^2.0.0"