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index.min.js
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'use strict';
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); /*
* Image Sequencer for ScrollMagic Scene
* (c) 2018
*
* Author:
* Ilya Kiselev
* ikiselev1989@gmail.com
*
* Project:
* https://github.com/ikiselev1989/scrollmagic-image-sequencer-plugin
*
* Version: 3.6.2
*
* Based on http://github.com/ertdfgcvb/Sequencer
*/
var _webglUtils = require('./webgl-utils/webgl-utils');
var _webglUtils2 = _interopRequireDefault(_webglUtils);
var _m = require('./webgl-utils/m4');
var _m2 = _interopRequireDefault(_m);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
String.prototype.repeat = String.prototype.repeat || function (n) {
return n <= 1 ? this : this + this.repeat(n - 1);
};
function padLeft(str, char, length) {
return char.repeat(Math.max(0, length - str.length)) + str;
}
var Sequencer = function () {
function Sequencer(opts, scene) {
var _this = this;
_classCallCheck(this, Sequencer);
var defaults = {
canvas: null,
canvasContext: 'auto', // can be: auto, webgl, 2d
from: '',
to: '',
asyncLoader: false,
scaleMode: 'cover', // can be: auto, cover, contain
framePosition: 'center center', // default: center center
hiDPI: true,
initFrameDraw: true,
totalLoadCallback: null,
imageLoadCallback: null
};
this.scene = scene;
this._config = Object.assign({}, defaults, opts);
// backwards compatibility: .retina field is assigned to .hiDPI (Retina is an Apple trademark)
if (opts.hasOwnProperty('retina')) this._config.hiDPI = opts.retina;
if (this._config.from == '' && this._config.to == '') {
console.error('Missing filenames.');
return false;
}
if (!this._config.canvas) {
console.error('Missing canvas node.');
return false;
}
this._stoped = false;
this._loadedImages = 0;
this._totalLoaded = false;
this._preloadTotalLoaded = false;
this._images = [];
this._isWebGL = true;
this._canvasInit();
var sequenceParser = this._parseSequence(this._config.from, this._config.to);
this._fileList = this._buildFileList(sequenceParser);
if (this._config.asyncLoader && typeof this._config.asyncLoader === 'boolean') {
this._config.asyncLoader = this._fileList.length;
}
var init = function init(progress) {
_this._sceneProgressInit(progress);
};
init(this.scene.progress());
}
_createClass(Sequencer, [{
key: '_webglInit',
value: function _webglInit() {
var _this2 = this;
var program = _webglUtils2.default.createProgramFromScripts(this._ctx, [{
src: 'attribute vec4 a_position;attribute vec2 a_texcoord;uniform mat4 u_matrix;uniform mat4 u_textureMatrix;varying vec2 v_texcoord;void main() {gl_Position = u_matrix * a_position;v_texcoord = (u_textureMatrix * vec4(a_texcoord, 0, 1)).xy;}',
type: 'x-shader/x-vertex'
}, {
src: 'precision mediump float;varying vec2 v_texcoord;uniform sampler2D u_texture;void main() {gl_FragColor = texture2D(u_texture, v_texcoord);}',
type: 'x-shader/x-fragment'
}]);
var positionLocation = this._ctx.getAttribLocation(program, 'a_position');
var texcoordLocation = this._ctx.getAttribLocation(program, 'a_texcoord');
var matrixLocation = this._ctx.getUniformLocation(program, 'u_matrix');
var textureMatrixLocation = this._ctx.getUniformLocation(program, 'u_textureMatrix');
var textureLocation = this._ctx.getUniformLocation(program, 'u_texture');
var positionBuffer = this._ctx.createBuffer();
this._ctx.bindBuffer(this._ctx.ARRAY_BUFFER, positionBuffer);
var positions = [0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1];
this._ctx.bufferData(this._ctx.ARRAY_BUFFER, new Float32Array(positions), this._ctx.STATIC_DRAW);
var texcoordBuffer = this._ctx.createBuffer();
this._ctx.bindBuffer(this._ctx.ARRAY_BUFFER, texcoordBuffer);
var texcoords = [0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1];
this._ctx.bufferData(this._ctx.ARRAY_BUFFER, new Float32Array(texcoords), this._ctx.STATIC_DRAW);
this._ctx.drawImage = function (tex, srcX, srcY, srcWidth, srcHeight, dstX, dstY, dstWidth, dstHeight) {
_this2._ctx.bindTexture(_this2._ctx.TEXTURE_2D, tex);
_this2._ctx.useProgram(program);
_this2._ctx.bindBuffer(_this2._ctx.ARRAY_BUFFER, positionBuffer);
_this2._ctx.enableVertexAttribArray(positionLocation);
_this2._ctx.vertexAttribPointer(positionLocation, 2, _this2._ctx.FLOAT, false, 0, 0);
_this2._ctx.bindBuffer(_this2._ctx.ARRAY_BUFFER, texcoordBuffer);
_this2._ctx.enableVertexAttribArray(texcoordLocation);
_this2._ctx.vertexAttribPointer(texcoordLocation, 2, _this2._ctx.FLOAT, false, 0, 0);
var matrix = _m2.default.orthographic(0, _this2._ctx.canvas.width, _this2._ctx.canvas.height, 0, -1, 1);
matrix = _m2.default.translate(matrix, dstX, dstY, 0);
matrix = _m2.default.scale(matrix, dstWidth, dstHeight, 1);
_this2._ctx.uniformMatrix4fv(matrixLocation, false, matrix);
var texMatrix = _m2.default.translation(srcX / srcWidth, srcY / srcHeight, 0);
texMatrix = _m2.default.scale(texMatrix, 1, 1, 1);
_this2._ctx.uniformMatrix4fv(textureMatrixLocation, false, texMatrix);
_this2._ctx.uniform1i(textureLocation, 0);
_this2._ctx.drawArrays(_this2._ctx.TRIANGLES, 0, 6);
};
}
}, {
key: '_canvasInit',
value: function _canvasInit() {
var tagName = this._config.canvas.tagName;
if (tagName === 'CANVAS') {
if (this._config.canvasContext === 'auto') {
this._ctx = this._config.canvas.getContext('webgl');
if (!this._ctx) {
this._isWebGL = false;
this._ctx = this._config.canvas.getContext('2d');
console.info('Scrollmagic sequencer use 2d context');
} else {
console.info('Scrollmagic sequencer use WebGL context');
this._webglInit();
}
} else {
this._ctx = this._config.canvas.getContext(this._config.canvasContext);
if (this._config.canvasContext === '2d') {
this._isWebGL = false;
console.info('Scrollmagic sequencer use 2d context');
} else {
console.info('Scrollmagic sequencer use WebGL context');
this._webglInit();
}
}
this._size(this._ctx.canvas.width, this._ctx.canvas.height);
} else if (tagName === 'IMG') {
this._imgMode = true;
} else {
console.error('Wrong canvas node.');
}
}
}, {
key: '_sceneProgressInit',
value: function _sceneProgressInit(progress) {
this._currentFrame = Math.round(progress * (this._fileList.length - 1));
this._preloader();
this.scene.on('progress', this._progressor.bind(this));
}
}, {
key: '_frameLoader',
value: function _frameLoader(targetFramesList) {
var _this3 = this;
var promisesList = [];
targetFramesList.forEach(function (frame) {
if (_this3._images[frame]) return;
var promise = new Promise(function (resolve, reject) {
var img = new Image();
img.onload = function () {
img.loaded = true;
_this3._loadedImages++;
if (_this3._config.initFrameDraw && frame === _this3._currentFrame) {
!_this3._imgMode && _this3._canvasDraw();
_this3._imgMode && _this3._imageDraw();
}
_this3._config.imageLoadCallback && _this3._config.imageLoadCallback({ img: img, frame: frame });
if (_this3._loadedImages === _this3._fileList.length) {
_this3._loadedImagesCallback();
}
resolve();
};
img.onerror = function () {
console.error('Error with image-id: ' + frame);
reject();
};
_this3._images[frame] = img;
img.src = _this3._fileList[frame];
});
promisesList.push(promise);
});
return Promise.all(promisesList);
}
}, {
key: '_preloader',
value: function _preloader() {
var _this4 = this;
this._frameLoader([this._currentFrame]).then(function () {
if (_this4._config.asyncLoader) {
_this4._asyncLoader(_this4._currentFrame);
} else {
_this4._syncLoader(_this4._currentFrame);
}
});
}
}, {
key: '_asyncLoader',
value: function _asyncLoader(initFrame) {
var _this5 = this;
if (this._loadedImages < this._fileList.length) {
var chunkStartIndex = (this._loadedImages + initFrame) % this._fileList.length;
var chunkEndIndex = chunkStartIndex + parseInt(this._config.asyncLoader);
chunkEndIndex = chunkEndIndex > this._fileList.length ? this._fileList.length : chunkEndIndex;
var chunkArray = [];
for (var i = chunkStartIndex; i < chunkEndIndex; i++) {
chunkArray.push(i);
}
this._frameLoader(chunkArray).then(function () {
requestAnimationFrame(_this5._asyncLoader.bind(_this5, initFrame));
});
}
}
}, {
key: '_syncLoader',
value: function _syncLoader(initFrame) {
var _this6 = this;
if (this._loadedImages < this._fileList.length) {
var currentIndex = (this._loadedImages + initFrame) % this._fileList.length;
this._frameLoader([currentIndex]).then(function () {
requestAnimationFrame(_this6._syncLoader.bind(_this6, initFrame));
});
}
}
}, {
key: '_loadedImagesCallback',
value: function _loadedImagesCallback() {
this._totalLoaded = true;
this._config.totalLoadCallback && this._config.totalLoadCallback();
}
}, {
key: '_progressor',
value: function _progressor(_ref) {
var progress = _ref.progress;
if (this._stoped) return;
this._currentFrame = Math.round(progress * (this._fileList.length - 1));
this._drawFrame();
}
}, {
key: '_drawFrame',
value: function _drawFrame() {
!this._imgMode && requestAnimationFrame(this._canvasDraw.bind(this));
this._imgMode && requestAnimationFrame(this._imageDraw.bind(this));
}
}, {
key: '_canvasDraw',
value: function _canvasDraw() {
var img = this._images[this._currentFrame];
if (!img || !img.loaded) return;
var r = this._config.hiDPI ? window.devicePixelRatio : 1;
var cw = this._isWebGL ? this._ctx.canvas.width : this._ctx.canvas.width / r;
var ch = this._isWebGL ? this._ctx.canvas.height : this._ctx.canvas.height / r;
var ca = cw / ch;
var ia = img.width / img.height;
var iw = void 0,
ih = void 0;
var ox = null,
oy = null;
if (this._config.scaleMode == 'cover') {
if (ca > ia) {
iw = cw;
ih = iw / ia;
} else {
ih = ch;
iw = ih * ia;
}
var position = this._config.framePosition.split(' ');
ox = position[0] === 'center' ? cw / 2 - iw / 2 : position[0] === 'left' ? 0 : cw - iw;
oy = position[1] === 'center' ? ch / 2 - ih / 2 : position[1] === 'top' ? 0 : ch - ih;
} else if (this._config.scaleMode == 'contain') {
if (ca < ia) {
iw = cw;
ih = iw / ia;
} else {
ih = ch;
iw = ih * ia;
}
} else {
//this._config.scaleMode == 'auto'
iw = img.width;
ih = img.height;
}
ox = ox === null ? cw / 2 - iw / 2 : ox;
oy = oy === null ? ch / 2 - ih / 2 : oy;
if (this._isWebGL) {
this._ctx.viewport(0, 0, this._ctx.canvas.width, this._ctx.canvas.height);
this._ctx.clear(this._ctx.COLOR_BUFFER_BIT);
var tex = this._ctx.createTexture();
this._ctx.bindTexture(this._ctx.TEXTURE_2D, tex);
this._ctx.texImage2D(this._ctx.TEXTURE_2D, 0, this._ctx.RGBA, 1, 1, 0, this._ctx.RGBA, this._ctx.UNSIGNED_BYTE, new Uint8Array([0, 0, 255, 255]));
this._ctx.texParameteri(this._ctx.TEXTURE_2D, this._ctx.TEXTURE_WRAP_S, this._ctx.CLAMP_TO_EDGE);
this._ctx.texParameteri(this._ctx.TEXTURE_2D, this._ctx.TEXTURE_WRAP_T, this._ctx.CLAMP_TO_EDGE);
this._ctx.texParameteri(this._ctx.TEXTURE_2D, this._ctx.TEXTURE_MIN_FILTER, this._ctx.LINEAR);
this._ctx.bindTexture(this._ctx.TEXTURE_2D, tex);
this._ctx.texImage2D(this._ctx.TEXTURE_2D, 0, this._ctx.RGBA, this._ctx.RGBA, this._ctx.UNSIGNED_BYTE, img);
this._ctx.drawImage(tex, 0, 0, img.width, img.height, ~~ox, ~~oy, ~~iw, ~~ih);
} else {
this._ctx.save();
this._ctx.scale(r, r);
this._ctx.clearRect(0, 0, cw, ch); // support for images with alpha
this._ctx.drawImage(img, 0, 0, img.width, img.height, ~~ox, ~~oy, ~~iw, ~~ih);
this._ctx.restore();
}
this._currentDrawFrame = this._currentFrame;
}
}, {
key: '_imageDraw',
value: function _imageDraw() {
var img = this._images[this._currentFrame];
if (!img || !img.loaded) return;
this._config.canvas.src = img.src;
}
}, {
key: '_size',
value: function _size(w, h) {
var r = this._config.hiDPI ? window.devicePixelRatio : 1;
var c = this._ctx.canvas;
c.width = w * r;
c.height = h * r;
c.style.width = w + 'px';
c.style.height = h + 'px';
}
}, {
key: '_parseSequence',
value: function _parseSequence(from, to) {
var l = Math.min(from.length, to.length);
var i = Math.max(0, from.lastIndexOf('/'));
while (from.charAt(i) == to.charAt(i) && !/[1-9]/.test(from.charAt(i)) && i < l) {
i++;
}var a = from.slice(i, from.lastIndexOf('.')); // from, may contain leading zeros
var b = to.slice(i, to.lastIndexOf('.')); // to
var ia = parseInt(a);
var ib = parseInt(b);
return {
from: ia,
to: ib,
base: from.substr(0, i),
ext: from.substr(from.lastIndexOf('.')),
zeroes: a.length == b.length && Math.floor(log10(ia)) < Math.floor(log10(ib)) ? a.length : 0,
length: Math.abs(ib - ia) + 1
};
function log10(x) {
return Math.log(x) / Math.LN10;
}
}
}, {
key: '_buildFileList',
value: function _buildFileList(sequenceObj) {
var q = [];
var dir = sequenceObj.from > sequenceObj.to ? -1 : 1;
for (var i = 0; i < sequenceObj.length; i++) {
var n = (sequenceObj.from + i * dir).toString();
var num = padLeft(n, '0', sequenceObj.zeroes);
q.push(sequenceObj.base + num + sequenceObj.ext);
}
return q;
}
}, {
key: 'resumeDrawing',
value: function resumeDrawing() {
this._stoped = false;
}
}, {
key: 'stopDrawing',
value: function stopDrawing() {
this._stoped = true;
}
}, {
key: 'resize',
value: function resize(width, height) {
if (!width || !height) {
return console.error('resize "width" or "height" missed');
}
this._size(width, height);
this._drawFrame();
}
}]);
return Sequencer;
}();
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define(['ScrollMagic'], factory);
} else if ((typeof exports === 'undefined' ? 'undefined' : _typeof(exports)) === 'object') {
// CommonJS
factory(require('scrollmagic'));
} else {
// no browser global export needed, just execute
factory(root.ScrollMagic || root.jQuery && root.jQuery.ScrollMagic);
}
})(undefined, function (ScrollMagic) {
// 'window' change to 'this'
ScrollMagic.Scene.prototype.addImageSequencer = function (opt) {
return new Sequencer(opt, this);
};
});