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SDL_gpu.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors 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 software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
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 software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"
#include "SDL_sysgpu.h"
// FIXME: This could probably use SDL_ObjectValid
#define CHECK_DEVICE_MAGIC(device, retval) \
if (device == NULL) { \
SDL_SetError("Invalid GPU device"); \
return retval; \
}
#define CHECK_COMMAND_BUFFER \
if (((CommandBufferCommonHeader *)command_buffer)->submitted) { \
SDL_assert_release(!"Command buffer already submitted!"); \
return; \
}
#define CHECK_COMMAND_BUFFER_RETURN_FALSE \
if (((CommandBufferCommonHeader *)command_buffer)->submitted) { \
SDL_assert_release(!"Command buffer already submitted!"); \
return false; \
}
#define CHECK_COMMAND_BUFFER_RETURN_NULL \
if (((CommandBufferCommonHeader *)command_buffer)->submitted) { \
SDL_assert_release(!"Command buffer already submitted!"); \
return NULL; \
}
#define CHECK_ANY_PASS_IN_PROGRESS(msg, retval) \
if ( \
((CommandBufferCommonHeader *)command_buffer)->render_pass.in_progress || \
((CommandBufferCommonHeader *)command_buffer)->compute_pass.in_progress || \
((CommandBufferCommonHeader *)command_buffer)->copy_pass.in_progress) { \
SDL_assert_release(!msg); \
return retval; \
}
#define CHECK_RENDERPASS \
if (!((Pass *)render_pass)->in_progress) { \
SDL_assert_release(!"Render pass not in progress!"); \
return; \
}
#define CHECK_GRAPHICS_PIPELINE_BOUND \
if (!((CommandBufferCommonHeader *)RENDERPASS_COMMAND_BUFFER)->graphics_pipeline_bound) { \
SDL_assert_release(!"Graphics pipeline not bound!"); \
return; \
}
#define CHECK_COMPUTEPASS \
if (!((Pass *)compute_pass)->in_progress) { \
SDL_assert_release(!"Compute pass not in progress!"); \
return; \
}
#define CHECK_COMPUTE_PIPELINE_BOUND \
if (!((CommandBufferCommonHeader *)COMPUTEPASS_COMMAND_BUFFER)->compute_pipeline_bound) { \
SDL_assert_release(!"Compute pipeline not bound!"); \
return; \
}
#define CHECK_COPYPASS \
if (!((Pass *)copy_pass)->in_progress) { \
SDL_assert_release(!"Copy pass not in progress!"); \
return; \
}
#define CHECK_TEXTUREFORMAT_ENUM_INVALID(enumval, retval) \
if (enumval <= SDL_GPU_TEXTUREFORMAT_INVALID || enumval >= SDL_GPU_TEXTUREFORMAT_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid texture format enum!"); \
return retval; \
}
#define CHECK_VERTEXELEMENTFORMAT_ENUM_INVALID(enumval, retval) \
if (enumval <= SDL_GPU_VERTEXELEMENTFORMAT_INVALID || enumval >= SDL_GPU_VERTEXELEMENTFORMAT_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid vertex format enum!"); \
return retval; \
}
#define CHECK_COMPAREOP_ENUM_INVALID(enumval, retval) \
if (enumval <= SDL_GPU_COMPAREOP_INVALID || enumval >= SDL_GPU_COMPAREOP_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid compare op enum!"); \
return retval; \
}
#define CHECK_STENCILOP_ENUM_INVALID(enumval, retval) \
if (enumval <= SDL_GPU_STENCILOP_INVALID || enumval >= SDL_GPU_STENCILOP_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid stencil op enum!"); \
return retval; \
}
#define CHECK_BLENDOP_ENUM_INVALID(enumval, retval) \
if (enumval <= SDL_GPU_BLENDOP_INVALID || enumval >= SDL_GPU_BLENDOP_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid blend op enum!"); \
return retval; \
}
#define CHECK_BLENDFACTOR_ENUM_INVALID(enumval, retval) \
if (enumval <= SDL_GPU_BLENDFACTOR_INVALID || enumval >= SDL_GPU_BLENDFACTOR_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid blend factor enum!"); \
return retval; \
}
#define CHECK_SWAPCHAINCOMPOSITION_ENUM_INVALID(enumval, retval) \
if (enumval < 0 || enumval >= SDL_GPU_SWAPCHAINCOMPOSITION_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid swapchain composition enum!"); \
return retval; \
}
#define CHECK_PRESENTMODE_ENUM_INVALID(enumval, retval) \
if (enumval < 0 || enumval >= SDL_GPU_PRESENTMODE_MAX_ENUM_VALUE) { \
SDL_assert_release(!"Invalid present mode enum!"); \
return retval; \
}
#define COMMAND_BUFFER_DEVICE \
((CommandBufferCommonHeader *)command_buffer)->device
#define RENDERPASS_COMMAND_BUFFER \
((Pass *)render_pass)->command_buffer
#define RENDERPASS_DEVICE \
((CommandBufferCommonHeader *)RENDERPASS_COMMAND_BUFFER)->device
#define COMPUTEPASS_COMMAND_BUFFER \
((Pass *)compute_pass)->command_buffer
#define COMPUTEPASS_DEVICE \
((CommandBufferCommonHeader *)COMPUTEPASS_COMMAND_BUFFER)->device
#define COPYPASS_COMMAND_BUFFER \
((Pass *)copy_pass)->command_buffer
#define COPYPASS_DEVICE \
((CommandBufferCommonHeader *)COPYPASS_COMMAND_BUFFER)->device
// Drivers
#ifndef SDL_GPU_DISABLED
static const SDL_GPUBootstrap *backends[] = {
#ifdef SDL_GPU_PRIVATE
&PrivateGPUDriver,
#endif
#ifdef SDL_GPU_METAL
&MetalDriver,
#endif
#ifdef SDL_GPU_VULKAN
&VulkanDriver,
#endif
#ifdef SDL_GPU_D3D12
&D3D12Driver,
#endif
NULL
};
#endif // !SDL_GPU_DISABLED
// Internal Utility Functions
SDL_GPUGraphicsPipeline *SDL_GPU_FetchBlitPipeline(
SDL_GPUDevice *device,
SDL_GPUTextureType source_texture_type,
SDL_GPUTextureFormat destination_format,
SDL_GPUShader *blit_vertex_shader,
SDL_GPUShader *blit_from_2d_shader,
SDL_GPUShader *blit_from_2d_array_shader,
SDL_GPUShader *blit_from_3d_shader,
SDL_GPUShader *blit_from_cube_shader,
SDL_GPUShader *blit_from_cube_array_shader,
BlitPipelineCacheEntry **blit_pipelines,
Uint32 *blit_pipeline_count,
Uint32 *blit_pipeline_capacity)
{
SDL_GPUGraphicsPipelineCreateInfo blit_pipeline_create_info;
SDL_GPUColorTargetDescription color_target_desc;
SDL_GPUGraphicsPipeline *pipeline;
if (blit_pipeline_count == NULL) {
// use pre-created, format-agnostic pipelines
return (*blit_pipelines)[source_texture_type].pipeline;
}
for (Uint32 i = 0; i < *blit_pipeline_count; i += 1) {
if ((*blit_pipelines)[i].type == source_texture_type && (*blit_pipelines)[i].format == destination_format) {
return (*blit_pipelines)[i].pipeline;
}
}
// No pipeline found, we'll need to make one!
SDL_zero(blit_pipeline_create_info);
SDL_zero(color_target_desc);
color_target_desc.blend_state.color_write_mask = 0xF;
color_target_desc.format = destination_format;
blit_pipeline_create_info.target_info.color_target_descriptions = &color_target_desc;
blit_pipeline_create_info.target_info.num_color_targets = 1;
blit_pipeline_create_info.target_info.depth_stencil_format = SDL_GPU_TEXTUREFORMAT_D16_UNORM; // arbitrary
blit_pipeline_create_info.target_info.has_depth_stencil_target = false;
blit_pipeline_create_info.vertex_shader = blit_vertex_shader;
if (source_texture_type == SDL_GPU_TEXTURETYPE_CUBE) {
blit_pipeline_create_info.fragment_shader = blit_from_cube_shader;
} else if (source_texture_type == SDL_GPU_TEXTURETYPE_CUBE_ARRAY) {
blit_pipeline_create_info.fragment_shader = blit_from_cube_array_shader;
} else if (source_texture_type == SDL_GPU_TEXTURETYPE_2D_ARRAY) {
blit_pipeline_create_info.fragment_shader = blit_from_2d_array_shader;
} else if (source_texture_type == SDL_GPU_TEXTURETYPE_3D) {
blit_pipeline_create_info.fragment_shader = blit_from_3d_shader;
} else {
blit_pipeline_create_info.fragment_shader = blit_from_2d_shader;
}
blit_pipeline_create_info.multisample_state.sample_count = SDL_GPU_SAMPLECOUNT_1;
blit_pipeline_create_info.multisample_state.enable_mask = false;
blit_pipeline_create_info.primitive_type = SDL_GPU_PRIMITIVETYPE_TRIANGLELIST;
pipeline = SDL_CreateGPUGraphicsPipeline(
device,
&blit_pipeline_create_info);
if (pipeline == NULL) {
SDL_SetError("Failed to create GPU pipeline for blit");
return NULL;
}
// Cache the new pipeline
EXPAND_ARRAY_IF_NEEDED(
(*blit_pipelines),
BlitPipelineCacheEntry,
*blit_pipeline_count + 1,
*blit_pipeline_capacity,
*blit_pipeline_capacity * 2);
(*blit_pipelines)[*blit_pipeline_count].pipeline = pipeline;
(*blit_pipelines)[*blit_pipeline_count].type = source_texture_type;
(*blit_pipelines)[*blit_pipeline_count].format = destination_format;
*blit_pipeline_count += 1;
return pipeline;
}
void SDL_GPU_BlitCommon(
SDL_GPUCommandBuffer *command_buffer,
const SDL_GPUBlitInfo *info,
SDL_GPUSampler *blit_linear_sampler,
SDL_GPUSampler *blit_nearest_sampler,
SDL_GPUShader *blit_vertex_shader,
SDL_GPUShader *blit_from_2d_shader,
SDL_GPUShader *blit_from_2d_array_shader,
SDL_GPUShader *blit_from_3d_shader,
SDL_GPUShader *blit_from_cube_shader,
SDL_GPUShader *blit_from_cube_array_shader,
BlitPipelineCacheEntry **blit_pipelines,
Uint32 *blit_pipeline_count,
Uint32 *blit_pipeline_capacity)
{
CommandBufferCommonHeader *cmdbufHeader = (CommandBufferCommonHeader *)command_buffer;
SDL_GPURenderPass *render_pass;
TextureCommonHeader *src_header = (TextureCommonHeader *)info->source.texture;
TextureCommonHeader *dst_header = (TextureCommonHeader *)info->destination.texture;
SDL_GPUGraphicsPipeline *blit_pipeline;
SDL_GPUColorTargetInfo color_target_info;
SDL_GPUViewport viewport;
SDL_GPUTextureSamplerBinding texture_sampler_binding;
BlitFragmentUniforms blit_fragment_uniforms;
Uint32 layer_divisor;
blit_pipeline = SDL_GPU_FetchBlitPipeline(
cmdbufHeader->device,
src_header->info.type,
dst_header->info.format,
blit_vertex_shader,
blit_from_2d_shader,
blit_from_2d_array_shader,
blit_from_3d_shader,
blit_from_cube_shader,
blit_from_cube_array_shader,
blit_pipelines,
blit_pipeline_count,
blit_pipeline_capacity);
SDL_assert(blit_pipeline != NULL);
color_target_info.load_op = info->load_op;
color_target_info.clear_color = info->clear_color;
color_target_info.store_op = SDL_GPU_STOREOP_STORE;
color_target_info.texture = info->destination.texture;
color_target_info.mip_level = info->destination.mip_level;
color_target_info.layer_or_depth_plane = info->destination.layer_or_depth_plane;
color_target_info.cycle = info->cycle;
render_pass = SDL_BeginGPURenderPass(
command_buffer,
&color_target_info,
1,
NULL);
viewport.x = (float)info->destination.x;
viewport.y = (float)info->destination.y;
viewport.w = (float)info->destination.w;
viewport.h = (float)info->destination.h;
viewport.min_depth = 0;
viewport.max_depth = 1;
SDL_SetGPUViewport(
render_pass,
&viewport);
SDL_BindGPUGraphicsPipeline(
render_pass,
blit_pipeline);
texture_sampler_binding.texture = info->source.texture;
texture_sampler_binding.sampler =
info->filter == SDL_GPU_FILTER_NEAREST ? blit_nearest_sampler : blit_linear_sampler;
SDL_BindGPUFragmentSamplers(
render_pass,
0,
&texture_sampler_binding,
1);
blit_fragment_uniforms.left = (float)info->source.x / (src_header->info.width >> info->source.mip_level);
blit_fragment_uniforms.top = (float)info->source.y / (src_header->info.height >> info->source.mip_level);
blit_fragment_uniforms.width = (float)info->source.w / (src_header->info.width >> info->source.mip_level);
blit_fragment_uniforms.height = (float)info->source.h / (src_header->info.height >> info->source.mip_level);
blit_fragment_uniforms.mip_level = info->source.mip_level;
layer_divisor = (src_header->info.type == SDL_GPU_TEXTURETYPE_3D) ? src_header->info.layer_count_or_depth : 1;
blit_fragment_uniforms.layer_or_depth = (float)info->source.layer_or_depth_plane / layer_divisor;
if (info->flip_mode & SDL_FLIP_HORIZONTAL) {
blit_fragment_uniforms.left += blit_fragment_uniforms.width;
blit_fragment_uniforms.width *= -1;
}
if (info->flip_mode & SDL_FLIP_VERTICAL) {
blit_fragment_uniforms.top += blit_fragment_uniforms.height;
blit_fragment_uniforms.height *= -1;
}
SDL_PushGPUFragmentUniformData(
command_buffer,
0,
&blit_fragment_uniforms,
sizeof(blit_fragment_uniforms));
SDL_DrawGPUPrimitives(render_pass, 3, 1, 0, 0);
SDL_EndGPURenderPass(render_pass);
}
// Driver Functions
#ifndef SDL_GPU_DISABLED
static const SDL_GPUBootstrap * SDL_GPUSelectBackend(SDL_PropertiesID props)
{
Uint32 i;
SDL_GPUShaderFormat format_flags = 0;
const char *gpudriver;
SDL_VideoDevice *_this = SDL_GetVideoDevice();
if (_this == NULL) {
SDL_SetError("Video subsystem not initialized");
return NULL;
}
if (SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_PRIVATE_BOOLEAN, false)) {
format_flags |= SDL_GPU_SHADERFORMAT_PRIVATE;
}
if (SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_SPIRV_BOOLEAN, false)) {
format_flags |= SDL_GPU_SHADERFORMAT_SPIRV;
}
if (SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXBC_BOOLEAN, false)) {
format_flags |= SDL_GPU_SHADERFORMAT_DXBC;
}
if (SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXIL_BOOLEAN, false)) {
format_flags |= SDL_GPU_SHADERFORMAT_DXIL;
}
if (SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_MSL_BOOLEAN, false)) {
format_flags |= SDL_GPU_SHADERFORMAT_MSL;
}
if (SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_METALLIB_BOOLEAN, false)) {
format_flags |= SDL_GPU_SHADERFORMAT_METALLIB;
}
gpudriver = SDL_GetHint(SDL_HINT_GPU_DRIVER);
if (gpudriver == NULL) {
gpudriver = SDL_GetStringProperty(props, SDL_PROP_GPU_DEVICE_CREATE_NAME_STRING, NULL);
}
// Environment/Properties override...
if (gpudriver != NULL) {
for (i = 0; backends[i]; i += 1) {
if (SDL_strcasecmp(gpudriver, backends[i]->name) == 0) {
if (!(backends[i]->shader_formats & format_flags)) {
SDL_SetError("Required shader format for backend %s not provided!", gpudriver);
return NULL;
}
if (backends[i]->PrepareDriver(_this)) {
return backends[i];
}
}
}
SDL_SetError("SDL_HINT_GPU_DRIVER %s unsupported!", gpudriver);
return NULL;
}
for (i = 0; backends[i]; i += 1) {
if ((backends[i]->shader_formats & format_flags) == 0) {
// Don't select a backend which doesn't support the app's shaders.
continue;
}
if (backends[i]->PrepareDriver(_this)) {
return backends[i];
}
}
SDL_SetError("No supported SDL_GPU backend found!");
return NULL;
}
static void SDL_GPU_FillProperties(
SDL_PropertiesID props,
SDL_GPUShaderFormat format_flags,
bool debug_mode,
const char *name)
{
if (format_flags & SDL_GPU_SHADERFORMAT_PRIVATE) {
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_PRIVATE_BOOLEAN, true);
}
if (format_flags & SDL_GPU_SHADERFORMAT_SPIRV) {
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_SPIRV_BOOLEAN, true);
}
if (format_flags & SDL_GPU_SHADERFORMAT_DXBC) {
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXBC_BOOLEAN, true);
}
if (format_flags & SDL_GPU_SHADERFORMAT_DXIL) {
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXIL_BOOLEAN, true);
}
if (format_flags & SDL_GPU_SHADERFORMAT_MSL) {
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_MSL_BOOLEAN, true);
}
if (format_flags & SDL_GPU_SHADERFORMAT_METALLIB) {
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_METALLIB_BOOLEAN, true);
}
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_DEBUGMODE_BOOLEAN, debug_mode);
SDL_SetStringProperty(props, SDL_PROP_GPU_DEVICE_CREATE_NAME_STRING, name);
}
#endif // SDL_GPU_DISABLED
bool SDL_GPUSupportsShaderFormats(
SDL_GPUShaderFormat format_flags,
const char *name)
{
#ifndef SDL_GPU_DISABLED
bool result;
SDL_PropertiesID props = SDL_CreateProperties();
SDL_GPU_FillProperties(props, format_flags, false, name);
result = SDL_GPUSupportsProperties(props);
SDL_DestroyProperties(props);
return result;
#else
SDL_SetError("SDL not built with GPU support");
return false;
#endif
}
bool SDL_GPUSupportsProperties(SDL_PropertiesID props)
{
#ifndef SDL_GPU_DISABLED
return (SDL_GPUSelectBackend(props) != NULL);
#else
SDL_SetError("SDL not built with GPU support");
return false;
#endif
}
SDL_GPUDevice *SDL_CreateGPUDevice(
SDL_GPUShaderFormat format_flags,
bool debug_mode,
const char *name)
{
#ifndef SDL_GPU_DISABLED
SDL_GPUDevice *result;
SDL_PropertiesID props = SDL_CreateProperties();
SDL_GPU_FillProperties(props, format_flags, debug_mode, name);
result = SDL_CreateGPUDeviceWithProperties(props);
SDL_DestroyProperties(props);
return result;
#else
SDL_SetError("SDL not built with GPU support");
return NULL;
#endif // SDL_GPU_DISABLED
}
SDL_GPUDevice *SDL_CreateGPUDeviceWithProperties(SDL_PropertiesID props)
{
#ifndef SDL_GPU_DISABLED
bool debug_mode;
bool preferLowPower;
SDL_GPUDevice *result = NULL;
const SDL_GPUBootstrap *selectedBackend;
selectedBackend = SDL_GPUSelectBackend(props);
if (selectedBackend != NULL) {
debug_mode = SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_DEBUGMODE_BOOLEAN, true);
preferLowPower = SDL_GetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_PREFERLOWPOWER_BOOLEAN, false);
result = selectedBackend->CreateDevice(debug_mode, preferLowPower, props);
if (result != NULL) {
result->backend = selectedBackend->name;
result->shader_formats = selectedBackend->shader_formats;
result->debug_mode = debug_mode;
}
}
return result;
#else
SDL_SetError("SDL not built with GPU support");
return NULL;
#endif // SDL_GPU_DISABLED
}
void SDL_DestroyGPUDevice(SDL_GPUDevice *device)
{
CHECK_DEVICE_MAGIC(device, );
device->DestroyDevice(device);
}
int SDL_GetNumGPUDrivers(void)
{
#ifndef SDL_GPU_DISABLED
return SDL_arraysize(backends) - 1;
#else
return 0;
#endif
}
const char * SDL_GetGPUDriver(int index)
{
if (index < 0 || index >= SDL_GetNumGPUDrivers()) {
SDL_InvalidParamError("index");
return NULL;
}
#ifndef SDL_GPU_DISABLED
return backends[index]->name;
#else
return NULL;
#endif
}
const char * SDL_GetGPUDeviceDriver(SDL_GPUDevice *device)
{
CHECK_DEVICE_MAGIC(device, NULL);
return device->backend;
}
SDL_GPUShaderFormat SDL_GetGPUShaderFormats(SDL_GPUDevice *device)
{
CHECK_DEVICE_MAGIC(device, SDL_GPU_SHADERFORMAT_INVALID);
return device->shader_formats;
}
Uint32 SDL_GPUTextureFormatTexelBlockSize(
SDL_GPUTextureFormat format)
{
switch (format) {
case SDL_GPU_TEXTUREFORMAT_BC1_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC1_RGBA_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_BC4_R_UNORM:
return 8;
case SDL_GPU_TEXTUREFORMAT_BC2_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC3_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC5_RG_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC7_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC6H_RGB_FLOAT:
case SDL_GPU_TEXTUREFORMAT_BC6H_RGB_UFLOAT:
case SDL_GPU_TEXTUREFORMAT_BC2_RGBA_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_BC3_RGBA_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_BC7_RGBA_UNORM_SRGB:
return 16;
case SDL_GPU_TEXTUREFORMAT_R8_UNORM:
case SDL_GPU_TEXTUREFORMAT_R8_SNORM:
case SDL_GPU_TEXTUREFORMAT_A8_UNORM:
case SDL_GPU_TEXTUREFORMAT_R8_UINT:
case SDL_GPU_TEXTUREFORMAT_R8_INT:
return 1;
case SDL_GPU_TEXTUREFORMAT_B5G6R5_UNORM:
case SDL_GPU_TEXTUREFORMAT_B4G4R4A4_UNORM:
case SDL_GPU_TEXTUREFORMAT_B5G5R5A1_UNORM:
case SDL_GPU_TEXTUREFORMAT_R16_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R8G8_SNORM:
case SDL_GPU_TEXTUREFORMAT_R8G8_UNORM:
case SDL_GPU_TEXTUREFORMAT_R8G8_UINT:
case SDL_GPU_TEXTUREFORMAT_R8G8_INT:
case SDL_GPU_TEXTUREFORMAT_R16_UNORM:
case SDL_GPU_TEXTUREFORMAT_R16_SNORM:
case SDL_GPU_TEXTUREFORMAT_R16_UINT:
case SDL_GPU_TEXTUREFORMAT_R16_INT:
case SDL_GPU_TEXTUREFORMAT_D16_UNORM:
return 2;
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UNORM:
case SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_R32_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R16G16_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R11G11B10_UFLOAT:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_SNORM:
case SDL_GPU_TEXTUREFORMAT_R10G10B10A2_UNORM:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UINT:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_INT:
case SDL_GPU_TEXTUREFORMAT_R16G16_UINT:
case SDL_GPU_TEXTUREFORMAT_R16G16_INT:
case SDL_GPU_TEXTUREFORMAT_R16G16_UNORM:
case SDL_GPU_TEXTUREFORMAT_R16G16_SNORM:
case SDL_GPU_TEXTUREFORMAT_D24_UNORM:
case SDL_GPU_TEXTUREFORMAT_D32_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R32_UINT:
case SDL_GPU_TEXTUREFORMAT_R32_INT:
case SDL_GPU_TEXTUREFORMAT_D24_UNORM_S8_UINT:
return 4;
case SDL_GPU_TEXTUREFORMAT_D32_FLOAT_S8_UINT:
return 5;
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_UNORM:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_SNORM:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_UINT:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_INT:
case SDL_GPU_TEXTUREFORMAT_R32G32_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R32G32_UINT:
case SDL_GPU_TEXTUREFORMAT_R32G32_INT:
return 8;
case SDL_GPU_TEXTUREFORMAT_R32G32B32A32_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R32G32B32A32_INT:
case SDL_GPU_TEXTUREFORMAT_R32G32B32A32_UINT:
return 16;
case SDL_GPU_TEXTUREFORMAT_ASTC_4x4_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x4_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x6_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x6_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x8_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x6_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x8_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x10_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x10_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x12_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_4x4_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x4_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x6_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x6_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x8_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x6_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x8_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x10_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x10_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x12_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_4x4_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x4_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x6_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x6_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x8_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x6_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x8_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x10_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x10_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x12_FLOAT:
return 16;
default:
SDL_assert_release(!"Unrecognized TextureFormat!");
return 0;
}
}
bool SDL_GPUTextureSupportsFormat(
SDL_GPUDevice *device,
SDL_GPUTextureFormat format,
SDL_GPUTextureType type,
SDL_GPUTextureUsageFlags usage)
{
CHECK_DEVICE_MAGIC(device, false);
if (device->debug_mode) {
CHECK_TEXTUREFORMAT_ENUM_INVALID(format, false)
}
return device->SupportsTextureFormat(
device->driverData,
format,
type,
usage);
}
bool SDL_GPUTextureSupportsSampleCount(
SDL_GPUDevice *device,
SDL_GPUTextureFormat format,
SDL_GPUSampleCount sample_count)
{
CHECK_DEVICE_MAGIC(device, 0);
if (device->debug_mode) {
CHECK_TEXTUREFORMAT_ENUM_INVALID(format, 0)
}
return device->SupportsSampleCount(
device->driverData,
format,
sample_count);
}
// State Creation
SDL_GPUComputePipeline *SDL_CreateGPUComputePipeline(
SDL_GPUDevice *device,
const SDL_GPUComputePipelineCreateInfo *createinfo)
{
CHECK_DEVICE_MAGIC(device, NULL);
if (createinfo == NULL) {
SDL_InvalidParamError("createinfo");
return NULL;
}
if (device->debug_mode) {
if (createinfo->format == SDL_GPU_SHADERFORMAT_INVALID) {
SDL_assert_release(!"Shader format cannot be INVALID!");
return NULL;
}
if (!(createinfo->format & device->shader_formats)) {
SDL_assert_release(!"Incompatible shader format for GPU backend");
return NULL;
}
if (createinfo->num_readwrite_storage_textures > MAX_COMPUTE_WRITE_TEXTURES) {
SDL_assert_release(!"Compute pipeline write-only texture count cannot be higher than 8!");
return NULL;
}
if (createinfo->num_readwrite_storage_buffers > MAX_COMPUTE_WRITE_BUFFERS) {
SDL_assert_release(!"Compute pipeline write-only buffer count cannot be higher than 8!");
return NULL;
}
if (createinfo->threadcount_x == 0 ||
createinfo->threadcount_y == 0 ||
createinfo->threadcount_z == 0) {
SDL_assert_release(!"Compute pipeline threadCount dimensions must be at least 1!");
return NULL;
}
}
return device->CreateComputePipeline(
device->driverData,
createinfo);
}
SDL_GPUGraphicsPipeline *SDL_CreateGPUGraphicsPipeline(
SDL_GPUDevice *device,
const SDL_GPUGraphicsPipelineCreateInfo *graphicsPipelineCreateInfo)
{
CHECK_DEVICE_MAGIC(device, NULL);
if (graphicsPipelineCreateInfo == NULL) {
SDL_InvalidParamError("graphicsPipelineCreateInfo");
return NULL;
}
if (device->debug_mode) {
if (graphicsPipelineCreateInfo->vertex_shader == NULL) {
SDL_assert_release(!"Vertex shader cannot be NULL!");
return NULL;
}
if (graphicsPipelineCreateInfo->fragment_shader == NULL) {
SDL_assert_release(!"Fragment shader cannot be NULL!");
return NULL;
}
if (graphicsPipelineCreateInfo->target_info.num_color_targets > 0 && graphicsPipelineCreateInfo->target_info.color_target_descriptions == NULL) {
SDL_assert_release(!"Color target descriptions array pointer cannot be NULL if num_color_targets is greater than zero!");
return NULL;
}
for (Uint32 i = 0; i < graphicsPipelineCreateInfo->target_info.num_color_targets; i += 1) {
CHECK_TEXTUREFORMAT_ENUM_INVALID(graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].format, NULL);
if (IsDepthFormat(graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].format)) {
SDL_assert_release(!"Color target formats cannot be a depth format!");
return NULL;
}
if (!SDL_GPUTextureSupportsFormat(device, graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].format, SDL_GPU_TEXTURETYPE_2D, SDL_GPU_TEXTUREUSAGE_COLOR_TARGET)) {
SDL_assert_release(!"Format is not supported for color targets on this device!");
return NULL;
}
if (graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].blend_state.enable_blend) {
const SDL_GPUColorTargetBlendState *blend_state = &graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].blend_state;
CHECK_BLENDFACTOR_ENUM_INVALID(blend_state->src_color_blendfactor, NULL)
CHECK_BLENDFACTOR_ENUM_INVALID(blend_state->dst_color_blendfactor, NULL)
CHECK_BLENDOP_ENUM_INVALID(blend_state->color_blend_op, NULL)
CHECK_BLENDFACTOR_ENUM_INVALID(blend_state->src_alpha_blendfactor, NULL)
CHECK_BLENDFACTOR_ENUM_INVALID(blend_state->dst_alpha_blendfactor, NULL)
CHECK_BLENDOP_ENUM_INVALID(blend_state->alpha_blend_op, NULL)
}
}
if (graphicsPipelineCreateInfo->target_info.has_depth_stencil_target) {
CHECK_TEXTUREFORMAT_ENUM_INVALID(graphicsPipelineCreateInfo->target_info.depth_stencil_format, NULL);
if (!IsDepthFormat(graphicsPipelineCreateInfo->target_info.depth_stencil_format)) {
SDL_assert_release(!"Depth-stencil target format must be a depth format!");
return NULL;
}
if (!SDL_GPUTextureSupportsFormat(device, graphicsPipelineCreateInfo->target_info.depth_stencil_format, SDL_GPU_TEXTURETYPE_2D, SDL_GPU_TEXTUREUSAGE_DEPTH_STENCIL_TARGET)) {
SDL_assert_release(!"Format is not supported for depth targets on this device!");
return NULL;
}
}
if (graphicsPipelineCreateInfo->vertex_input_state.num_vertex_buffers > 0 && graphicsPipelineCreateInfo->vertex_input_state.vertex_buffer_descriptions == NULL) {
SDL_assert_release(!"Vertex buffer descriptions array pointer cannot be NULL!");
return NULL;
}
if (graphicsPipelineCreateInfo->vertex_input_state.num_vertex_buffers > MAX_VERTEX_BUFFERS) {
SDL_assert_release(!"The number of vertex buffer descriptions in a vertex input state must not exceed 16!");
return NULL;
}
if (graphicsPipelineCreateInfo->vertex_input_state.num_vertex_attributes > 0 && graphicsPipelineCreateInfo->vertex_input_state.vertex_attributes == NULL) {
SDL_assert_release(!"Vertex attributes array pointer cannot be NULL!");
return NULL;
}
if (graphicsPipelineCreateInfo->vertex_input_state.num_vertex_attributes > MAX_VERTEX_ATTRIBUTES) {
SDL_assert_release(!"The number of vertex attributes in a vertex input state must not exceed 16!");
return NULL;
}
for (Uint32 i = 0; i < graphicsPipelineCreateInfo->vertex_input_state.num_vertex_buffers; i += 1) {
if (graphicsPipelineCreateInfo->vertex_input_state.vertex_buffer_descriptions[i].instance_step_rate != 0) {
SDL_assert_release(!"For all vertex buffer descriptions, instance_step_rate must be 0!");
return NULL;
}
}
Uint32 locations[MAX_VERTEX_ATTRIBUTES];
for (Uint32 i = 0; i < graphicsPipelineCreateInfo->vertex_input_state.num_vertex_attributes; i += 1) {
CHECK_VERTEXELEMENTFORMAT_ENUM_INVALID(graphicsPipelineCreateInfo->vertex_input_state.vertex_attributes[i].format, NULL);
locations[i] = graphicsPipelineCreateInfo->vertex_input_state.vertex_attributes[i].location;
for (Uint32 j = 0; j < i; j += 1) {
if (locations[j] == locations[i]) {
SDL_assert_release(!"Each vertex attribute location in a vertex input state must be unique!");
return NULL;
}
}
}
if (graphicsPipelineCreateInfo->multisample_state.enable_mask) {
SDL_assert_release(!"For multisample states, enable_mask must be false!");
return NULL;
}
if (graphicsPipelineCreateInfo->multisample_state.sample_mask != 0) {
SDL_assert_release(!"For multisample states, sample_mask must be 0!");
return NULL;
}
if (graphicsPipelineCreateInfo->depth_stencil_state.enable_depth_test) {
CHECK_COMPAREOP_ENUM_INVALID(graphicsPipelineCreateInfo->depth_stencil_state.compare_op, NULL)
}
if (graphicsPipelineCreateInfo->depth_stencil_state.enable_stencil_test) {
const SDL_GPUStencilOpState *stencil_state = &graphicsPipelineCreateInfo->depth_stencil_state.back_stencil_state;
CHECK_COMPAREOP_ENUM_INVALID(stencil_state->compare_op, NULL)
CHECK_STENCILOP_ENUM_INVALID(stencil_state->fail_op, NULL)
CHECK_STENCILOP_ENUM_INVALID(stencil_state->pass_op, NULL)
CHECK_STENCILOP_ENUM_INVALID(stencil_state->depth_fail_op, NULL)
}
}
return device->CreateGraphicsPipeline(
device->driverData,
graphicsPipelineCreateInfo);
}
SDL_GPUSampler *SDL_CreateGPUSampler(
SDL_GPUDevice *device,
const SDL_GPUSamplerCreateInfo *createinfo)
{
CHECK_DEVICE_MAGIC(device, NULL);
if (createinfo == NULL) {
SDL_InvalidParamError("createinfo");
return NULL;
}
return device->CreateSampler(
device->driverData,
createinfo);
}
SDL_GPUShader *SDL_CreateGPUShader(
SDL_GPUDevice *device,
const SDL_GPUShaderCreateInfo *createinfo)
{
CHECK_DEVICE_MAGIC(device, NULL);
if (createinfo == NULL) {
SDL_InvalidParamError("createinfo");
return NULL;
}
if (device->debug_mode) {
if (createinfo->format == SDL_GPU_SHADERFORMAT_INVALID) {
SDL_assert_release(!"Shader format cannot be INVALID!");
return NULL;
}
if (!(createinfo->format & device->shader_formats)) {
SDL_assert_release(!"Incompatible shader format for GPU backend");
return NULL;
}
}
return device->CreateShader(
device->driverData,
createinfo);
}
SDL_GPUTexture *SDL_CreateGPUTexture(
SDL_GPUDevice *device,
const SDL_GPUTextureCreateInfo *createinfo)
{
CHECK_DEVICE_MAGIC(device, NULL);
if (createinfo == NULL) {
SDL_InvalidParamError("createinfo");
return NULL;
}
if (device->debug_mode) {
bool failed = false;
const Uint32 MAX_2D_DIMENSION = 16384;
const Uint32 MAX_3D_DIMENSION = 2048;
// Common checks for all texture types
CHECK_TEXTUREFORMAT_ENUM_INVALID(createinfo->format, NULL)
if (createinfo->width <= 0 || createinfo->height <= 0 || createinfo->layer_count_or_depth <= 0) {
SDL_assert_release(!"For any texture: width, height, and layer_count_or_depth must be >= 1");
failed = true;
}
if (createinfo->num_levels <= 0) {
SDL_assert_release(!"For any texture: num_levels must be >= 1");
failed = true;
}
if ((createinfo->usage & SDL_GPU_TEXTUREUSAGE_GRAPHICS_STORAGE_READ) && (createinfo->usage & SDL_GPU_TEXTUREUSAGE_SAMPLER)) {
SDL_assert_release(!"For any texture: usage cannot contain both GRAPHICS_STORAGE_READ and SAMPLER");
failed = true;
}
if (createinfo->sample_count > SDL_GPU_SAMPLECOUNT_1 &&
(createinfo->usage & (SDL_GPU_TEXTUREUSAGE_SAMPLER |
SDL_GPU_TEXTUREUSAGE_GRAPHICS_STORAGE_READ |
SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_READ |
SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_WRITE))) {
SDL_assert_release(!"For multisample textures: usage cannot contain SAMPLER or STORAGE flags");
failed = true;
}
if (IsDepthFormat(createinfo->format) && (createinfo->usage & ~(SDL_GPU_TEXTUREUSAGE_DEPTH_STENCIL_TARGET | SDL_GPU_TEXTUREUSAGE_SAMPLER))) {
SDL_assert_release(!"For depth textures: usage cannot contain any flags except for DEPTH_STENCIL_TARGET and SAMPLER");
failed = true;
}
if (IsIntegerFormat(createinfo->format) && (createinfo->usage & SDL_GPU_TEXTUREUSAGE_SAMPLER)) {
SDL_assert_release(!"For any texture: usage cannot contain SAMPLER for textures with an integer format");
failed = true;
}
if (createinfo->type == SDL_GPU_TEXTURETYPE_CUBE) {
// Cubemap validation
if (createinfo->width != createinfo->height) {
SDL_assert_release(!"For cube textures: width and height must be identical");
failed = true;
}
if (createinfo->width > MAX_2D_DIMENSION || createinfo->height > MAX_2D_DIMENSION) {
SDL_assert_release(!"For cube textures: width and height must be <= 16384");
failed = true;