src/dawn/utils/WGPUHelpers.cpp - dawn - Git at Google

 // Copyright 2017 The Dawn Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include "dawn/utils/WGPUHelpers.h"

 #include <cstring>
 #include <iomanip>
 #include <limits>
 #include <mutex>
 #include <sstream>

 #include "dawn/common/Constants.h"
 #include "dawn/common/Log.h"
 #include "dawn/common/Numeric.h"

 #include "spirv-tools/optimizer.hpp"

 namespace {
 std::array<float, 12> kYuvToRGBMatrixBT709 = {1.164384f, 0.0f,       1.792741f,  -0.972945f,
                                               1.164384f, -0.213249f, -0.532909f, 0.301483f,
                                               1.164384f, 2.112402f,  0.0f,       -1.133402f};
 std::array<float, 9> kGamutConversionMatrixBT709ToSrgb = {1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
                                                           0.0f, 0.0f, 0.0f, 1.0f};
 std::array<float, 7> kGammaDecodeBT709 = {2.2, 1.0 / 1.099, 0.099 / 1.099, 1 / 4.5, 0.081,
                                           0.0, 0.0};
 std::array<float, 7> kGammaEncodeSrgb = {1 / 2.4, 1.137119, 0.0, 12.92, 0.0031308, -0.055, 0.0};
 }  // namespace

 namespace utils {
 wgpu::ShaderModule CreateShaderModuleFromASM(const wgpu::Device& device, const char* source) {
     // Use SPIRV-Tools's C API to assemble the SPIR-V assembly text to binary. Because the types
     // aren't RAII, we don't return directly on success and instead always go through the code
     // path that destroys the SPIRV-Tools objects.
     wgpu::ShaderModule result = nullptr;

     spv_context context = spvContextCreate(SPV_ENV_UNIVERSAL_1_3);
     ASSERT(context != nullptr);

     spv_binary spirv = nullptr;
     spv_diagnostic diagnostic = nullptr;
     if (spvTextToBinary(context, source, strlen(source), &spirv, &diagnostic) == SPV_SUCCESS) {
         ASSERT(spirv != nullptr);
         ASSERT(spirv->wordCount <= std::numeric_limits<uint32_t>::max());

         wgpu::ShaderModuleSPIRVDescriptor spirvDesc;
         spirvDesc.codeSize = static_cast<uint32_t>(spirv->wordCount);
         spirvDesc.code = spirv->code;

         wgpu::ShaderModuleDescriptor descriptor;
         descriptor.nextInChain = &spirvDesc;
         result = device.CreateShaderModule(&descriptor);
     } else {
         ASSERT(diagnostic != nullptr);
         dawn::WarningLog() << "CreateShaderModuleFromASM SPIRV assembly error:"
                            << diagnostic->position.line + 1 << ":"
                            << diagnostic->position.column + 1 << ": " << diagnostic->error;
     }

     spvDiagnosticDestroy(diagnostic);
     spvBinaryDestroy(spirv);
     spvContextDestroy(context);

     return result;
 }

 wgpu::ShaderModule CreateShaderModule(const wgpu::Device& device, const char* source) {
     wgpu::ShaderModuleWGSLDescriptor wgslDesc;
     wgslDesc.source = source;
     wgpu::ShaderModuleDescriptor descriptor;
     descriptor.nextInChain = &wgslDesc;
     return device.CreateShaderModule(&descriptor);
 }

 wgpu::Buffer CreateBufferFromData(const wgpu::Device& device,
                                   const void* data,
                                   uint64_t size,
                                   wgpu::BufferUsage usage) {
     wgpu::BufferDescriptor descriptor;
     descriptor.size = size;
     descriptor.usage = usage | wgpu::BufferUsage::CopyDst;
     wgpu::Buffer buffer = device.CreateBuffer(&descriptor);

     device.GetQueue().WriteBuffer(buffer, 0, data, size);
     return buffer;
 }

 ComboRenderPassDescriptor::ComboRenderPassDescriptor(
     std::initializer_list<wgpu::TextureView> colorAttachmentInfo,
     wgpu::TextureView depthStencil) {
     for (uint32_t i = 0; i < kMaxColorAttachments; ++i) {
         cColorAttachments[i].loadOp = wgpu::LoadOp::Clear;
         cColorAttachments[i].storeOp = wgpu::StoreOp::Store;
         cColorAttachments[i].clearValue = {0.0f, 0.0f, 0.0f, 0.0f};
     }

     cDepthStencilAttachmentInfo.depthClearValue = 1.0f;
     cDepthStencilAttachmentInfo.stencilClearValue = 0;
     cDepthStencilAttachmentInfo.depthLoadOp = wgpu::LoadOp::Clear;
     cDepthStencilAttachmentInfo.depthStoreOp = wgpu::StoreOp::Store;
     cDepthStencilAttachmentInfo.stencilLoadOp = wgpu::LoadOp::Clear;
     cDepthStencilAttachmentInfo.stencilStoreOp = wgpu::StoreOp::Store;

     colorAttachmentCount = static_cast<uint32_t>(colorAttachmentInfo.size());
     uint32_t colorAttachmentIndex = 0;
     for (const wgpu::TextureView& colorAttachment : colorAttachmentInfo) {
         if (colorAttachment.Get() != nullptr) {
             cColorAttachments[colorAttachmentIndex].view = colorAttachment;
         }
         ++colorAttachmentIndex;
     }
     colorAttachments = cColorAttachments.data();

     if (depthStencil.Get() != nullptr) {
         cDepthStencilAttachmentInfo.view = depthStencil;
         depthStencilAttachment = &cDepthStencilAttachmentInfo;
     } else {
         depthStencilAttachment = nullptr;
     }
 }

 ComboRenderPassDescriptor::~ComboRenderPassDescriptor() = default;

 ComboRenderPassDescriptor::ComboRenderPassDescriptor(const ComboRenderPassDescriptor& other) {
     *this = other;
 }

 const ComboRenderPassDescriptor& ComboRenderPassDescriptor::operator=(
     const ComboRenderPassDescriptor& otherRenderPass) {
     cDepthStencilAttachmentInfo = otherRenderPass.cDepthStencilAttachmentInfo;
     cColorAttachments = otherRenderPass.cColorAttachments;
     colorAttachmentCount = otherRenderPass.colorAttachmentCount;

     colorAttachments = cColorAttachments.data();

     if (otherRenderPass.depthStencilAttachment != nullptr) {
         // Assign desc.depthStencilAttachment to this->depthStencilAttachmentInfo;
         depthStencilAttachment = &cDepthStencilAttachmentInfo;
     } else {
         depthStencilAttachment = nullptr;
     }

     return *this;
 }
 void ComboRenderPassDescriptor::UnsetDepthStencilLoadStoreOpsForFormat(wgpu::TextureFormat format) {
     switch (format) {
         case wgpu::TextureFormat::Depth24Plus:
         case wgpu::TextureFormat::Depth32Float:
         case wgpu::TextureFormat::Depth16Unorm:
             cDepthStencilAttachmentInfo.stencilLoadOp = wgpu::LoadOp::Undefined;
             cDepthStencilAttachmentInfo.stencilStoreOp = wgpu::StoreOp::Undefined;
             break;
         case wgpu::TextureFormat::Stencil8:
             cDepthStencilAttachmentInfo.depthLoadOp = wgpu::LoadOp::Undefined;
             cDepthStencilAttachmentInfo.depthStoreOp = wgpu::StoreOp::Undefined;
             break;
         default:
             break;
     }
 }

 BasicRenderPass::BasicRenderPass()
     : width(0),
       height(0),
       color(nullptr),
       colorFormat(wgpu::TextureFormat::RGBA8Unorm),
       renderPassInfo({}) {}

 BasicRenderPass::BasicRenderPass(uint32_t texWidth,
                                  uint32_t texHeight,
                                  wgpu::Texture colorAttachment,
                                  wgpu::TextureFormat textureFormat)
     : width(texWidth),
       height(texHeight),
       color(colorAttachment),
       colorFormat(textureFormat),
       renderPassInfo({colorAttachment.CreateView()}) {}

 BasicRenderPass CreateBasicRenderPass(const wgpu::Device& device,
                                       uint32_t width,
                                       uint32_t height,
                                       wgpu::TextureFormat format) {
     DAWN_ASSERT(width > 0 && height > 0);

     wgpu::TextureDescriptor descriptor;
     descriptor.dimension = wgpu::TextureDimension::e2D;
     descriptor.size.width = width;
     descriptor.size.height = height;
     descriptor.size.depthOrArrayLayers = 1;
     descriptor.sampleCount = 1;
     descriptor.format = format;
     descriptor.mipLevelCount = 1;
     descriptor.usage = wgpu::TextureUsage::RenderAttachment | wgpu::TextureUsage::CopySrc;
     wgpu::Texture color = device.CreateTexture(&descriptor);

     return BasicRenderPass(width, height, color);
 }

 wgpu::ImageCopyBuffer CreateImageCopyBuffer(wgpu::Buffer buffer,
                                             uint64_t offset,
                                             uint32_t bytesPerRow,
                                             uint32_t rowsPerImage) {
     wgpu::ImageCopyBuffer imageCopyBuffer = {};
     imageCopyBuffer.buffer = buffer;
     imageCopyBuffer.layout = CreateTextureDataLayout(offset, bytesPerRow, rowsPerImage);

     return imageCopyBuffer;
 }

 wgpu::ImageCopyTexture CreateImageCopyTexture(wgpu::Texture texture,
                                               uint32_t mipLevel,
                                               wgpu::Origin3D origin,
                                               wgpu::TextureAspect aspect) {
     wgpu::ImageCopyTexture imageCopyTexture;
     imageCopyTexture.texture = texture;
     imageCopyTexture.mipLevel = mipLevel;
     imageCopyTexture.origin = origin;
     imageCopyTexture.aspect = aspect;

     return imageCopyTexture;
 }

 wgpu::TextureDataLayout CreateTextureDataLayout(uint64_t offset,
                                                 uint32_t bytesPerRow,
                                                 uint32_t rowsPerImage) {
     wgpu::TextureDataLayout textureDataLayout;
     textureDataLayout.offset = offset;
     textureDataLayout.bytesPerRow = bytesPerRow;
     textureDataLayout.rowsPerImage = rowsPerImage;

     return textureDataLayout;
 }

 wgpu::PipelineLayout MakeBasicPipelineLayout(const wgpu::Device& device,
                                              const wgpu::BindGroupLayout* bindGroupLayout) {
     wgpu::PipelineLayoutDescriptor descriptor;
     if (bindGroupLayout != nullptr) {
         descriptor.bindGroupLayoutCount = 1;
         descriptor.bindGroupLayouts = bindGroupLayout;
     } else {
         descriptor.bindGroupLayoutCount = 0;
         descriptor.bindGroupLayouts = nullptr;
     }
     return device.CreatePipelineLayout(&descriptor);
 }

 wgpu::PipelineLayout MakePipelineLayout(const wgpu::Device& device,
                                         std::vector<wgpu::BindGroupLayout> bgls) {
     wgpu::PipelineLayoutDescriptor descriptor;
     descriptor.bindGroupLayoutCount = uint32_t(bgls.size());
     descriptor.bindGroupLayouts = bgls.data();
     return device.CreatePipelineLayout(&descriptor);
 }

 wgpu::BindGroupLayout MakeBindGroupLayout(
     const wgpu::Device& device,
     std::initializer_list<BindingLayoutEntryInitializationHelper> entriesInitializer) {
     std::vector<wgpu::BindGroupLayoutEntry> entries;
     for (const BindingLayoutEntryInitializationHelper& entry : entriesInitializer) {
         entries.push_back(entry);
     }

     wgpu::BindGroupLayoutDescriptor descriptor;
     descriptor.entryCount = static_cast<uint32_t>(entries.size());
     descriptor.entries = entries.data();
     return device.CreateBindGroupLayout(&descriptor);
 }

 BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
     uint32_t entryBinding,
     wgpu::ShaderStage entryVisibility,
     wgpu::BufferBindingType bufferType,
     bool bufferHasDynamicOffset,
     uint64_t bufferMinBindingSize) {
     binding = entryBinding;
     visibility = entryVisibility;
     buffer.type = bufferType;
     buffer.hasDynamicOffset = bufferHasDynamicOffset;
     buffer.minBindingSize = bufferMinBindingSize;
 }

 BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
     uint32_t entryBinding,
     wgpu::ShaderStage entryVisibility,
     wgpu::SamplerBindingType samplerType) {
     binding = entryBinding;
     visibility = entryVisibility;
     sampler.type = samplerType;
 }

 BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
     uint32_t entryBinding,
     wgpu::ShaderStage entryVisibility,
     wgpu::TextureSampleType textureSampleType,
     wgpu::TextureViewDimension textureViewDimension,
     bool textureMultisampled) {
     binding = entryBinding;
     visibility = entryVisibility;
     texture.sampleType = textureSampleType;
     texture.viewDimension = textureViewDimension;
     texture.multisampled = textureMultisampled;
 }

 BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
     uint32_t entryBinding,
     wgpu::ShaderStage entryVisibility,
     wgpu::StorageTextureAccess storageTextureAccess,
     wgpu::TextureFormat format,
     wgpu::TextureViewDimension textureViewDimension) {
     binding = entryBinding;
     visibility = entryVisibility;
     storageTexture.access = storageTextureAccess;
     storageTexture.format = format;
     storageTexture.viewDimension = textureViewDimension;
 }

 // ExternalTextureBindingLayout never contains data, so just make one that can be reused instead
 // of declaring a new one every time it's needed.
 wgpu::ExternalTextureBindingLayout kExternalTextureBindingLayout = {};

 BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
     uint32_t entryBinding,
     wgpu::ShaderStage entryVisibility,
     wgpu::ExternalTextureBindingLayout* bindingLayout) {
     binding = entryBinding;
     visibility = entryVisibility;
     nextInChain = bindingLayout;
 }

 BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
     const wgpu::BindGroupLayoutEntry& entry)
     : wgpu::BindGroupLayoutEntry(entry) {}

 BindingInitializationHelper::BindingInitializationHelper(uint32_t binding,
                                                          const wgpu::Sampler& sampler)
     : binding(binding), sampler(sampler) {}

 BindingInitializationHelper::BindingInitializationHelper(uint32_t binding,
                                                          const wgpu::TextureView& textureView)
     : binding(binding), textureView(textureView) {}

 BindingInitializationHelper::BindingInitializationHelper(
     uint32_t binding,
     const wgpu::ExternalTexture& externalTexture)
     : binding(binding) {
     externalTextureBindingEntry.externalTexture = externalTexture;
 }

 BindingInitializationHelper::BindingInitializationHelper(uint32_t binding,
                                                          const wgpu::Buffer& buffer,
                                                          uint64_t offset,
                                                          uint64_t size)
     : binding(binding), buffer(buffer), offset(offset), size(size) {}

 BindingInitializationHelper::BindingInitializationHelper(const BindingInitializationHelper&) =
     default;

 BindingInitializationHelper::~BindingInitializationHelper() = default;

 wgpu::BindGroupEntry BindingInitializationHelper::GetAsBinding() const {
     wgpu::BindGroupEntry result;

     result.binding = binding;
     result.sampler = sampler;
     result.textureView = textureView;
     result.buffer = buffer;
     result.offset = offset;
     result.size = size;
     if (externalTextureBindingEntry.externalTexture != nullptr) {
         result.nextInChain = &externalTextureBindingEntry;
     }

     return result;
 }

 wgpu::BindGroup MakeBindGroup(
     const wgpu::Device& device,
     const wgpu::BindGroupLayout& layout,
     std::initializer_list<BindingInitializationHelper> entriesInitializer) {
     std::vector<wgpu::BindGroupEntry> entries;
     for (const BindingInitializationHelper& helper : entriesInitializer) {
         entries.push_back(helper.GetAsBinding());
     }

     wgpu::BindGroupDescriptor descriptor;
     descriptor.layout = layout;
     descriptor.entryCount = checked_cast<uint32_t>(entries.size());
     descriptor.entries = entries.data();

     return device.CreateBindGroup(&descriptor);
 }

 ColorSpaceConversionInfo GetYUVBT709ToRGBSRGBColorSpaceConversionInfo() {
     ColorSpaceConversionInfo info;
     info.yuvToRgbConversionMatrix = kYuvToRGBMatrixBT709;
     info.gamutConversionMatrix = kGamutConversionMatrixBT709ToSrgb;
     info.srcTransferFunctionParameters = kGammaDecodeBT709;
     info.dstTransferFunctionParameters = kGammaEncodeSrgb;

     return info;
 }

 }  // namespace utils
	// Copyright 2017 The Dawn Authors
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include "dawn/utils/WGPUHelpers.h"

	#include <cstring>
	#include <iomanip>
	#include <limits>
	#include <mutex>
	#include <sstream>

	#include "dawn/common/Constants.h"
	#include "dawn/common/Log.h"
	#include "dawn/common/Numeric.h"

	#include "spirv-tools/optimizer.hpp"

	namespace {
	std::array<float, 12> kYuvToRGBMatrixBT709 = {1.164384f, 0.0f, 1.792741f, -0.972945f,
	1.164384f, -0.213249f, -0.532909f, 0.301483f,
	1.164384f, 2.112402f, 0.0f, -1.133402f};
	std::array<float, 9> kGamutConversionMatrixBT709ToSrgb = {1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
	0.0f, 0.0f, 0.0f, 1.0f};
	std::array<float, 7> kGammaDecodeBT709 = {2.2, 1.0 / 1.099, 0.099 / 1.099, 1 / 4.5, 0.081,
	0.0, 0.0};
	std::array<float, 7> kGammaEncodeSrgb = {1 / 2.4, 1.137119, 0.0, 12.92, 0.0031308, -0.055, 0.0};
	} // namespace

	namespace utils {
	wgpu::ShaderModule CreateShaderModuleFromASM(const wgpu::Device& device, const char* source) {
	// Use SPIRV-Tools's C API to assemble the SPIR-V assembly text to binary. Because the types
	// aren't RAII, we don't return directly on success and instead always go through the code
	// path that destroys the SPIRV-Tools objects.
	wgpu::ShaderModule result = nullptr;

	spv_context context = spvContextCreate(SPV_ENV_UNIVERSAL_1_3);
	ASSERT(context != nullptr);

	spv_binary spirv = nullptr;
	spv_diagnostic diagnostic = nullptr;
	if (spvTextToBinary(context, source, strlen(source), &spirv, &diagnostic) == SPV_SUCCESS) {
	ASSERT(spirv != nullptr);
	ASSERT(spirv->wordCount <= std::numeric_limits<uint32_t>::max());

	wgpu::ShaderModuleSPIRVDescriptor spirvDesc;
	spirvDesc.codeSize = static_cast<uint32_t>(spirv->wordCount);
	spirvDesc.code = spirv->code;

	wgpu::ShaderModuleDescriptor descriptor;
	descriptor.nextInChain = &spirvDesc;
	result = device.CreateShaderModule(&descriptor);
	} else {
	ASSERT(diagnostic != nullptr);
	dawn::WarningLog() << "CreateShaderModuleFromASM SPIRV assembly error:"
	<< diagnostic->position.line + 1 << ":"
	<< diagnostic->position.column + 1 << ": " << diagnostic->error;
	}

	spvDiagnosticDestroy(diagnostic);
	spvBinaryDestroy(spirv);
	spvContextDestroy(context);

	return result;
	}

	wgpu::ShaderModule CreateShaderModule(const wgpu::Device& device, const char* source) {
	wgpu::ShaderModuleWGSLDescriptor wgslDesc;
	wgslDesc.source = source;
	wgpu::ShaderModuleDescriptor descriptor;
	descriptor.nextInChain = &wgslDesc;
	return device.CreateShaderModule(&descriptor);
	}

	wgpu::Buffer CreateBufferFromData(const wgpu::Device& device,
	const void* data,
	uint64_t size,
	wgpu::BufferUsage usage) {
	wgpu::BufferDescriptor descriptor;
	descriptor.size = size;
	descriptor.usage = usage \| wgpu::BufferUsage::CopyDst;
	wgpu::Buffer buffer = device.CreateBuffer(&descriptor);

	device.GetQueue().WriteBuffer(buffer, 0, data, size);
	return buffer;
	}

	ComboRenderPassDescriptor::ComboRenderPassDescriptor(
	std::initializer_list<wgpu::TextureView> colorAttachmentInfo,
	wgpu::TextureView depthStencil) {
	for (uint32_t i = 0; i < kMaxColorAttachments; ++i) {
	cColorAttachments[i].loadOp = wgpu::LoadOp::Clear;
	cColorAttachments[i].storeOp = wgpu::StoreOp::Store;
	cColorAttachments[i].clearValue = {0.0f, 0.0f, 0.0f, 0.0f};
	}

	cDepthStencilAttachmentInfo.depthClearValue = 1.0f;
	cDepthStencilAttachmentInfo.stencilClearValue = 0;
	cDepthStencilAttachmentInfo.depthLoadOp = wgpu::LoadOp::Clear;
	cDepthStencilAttachmentInfo.depthStoreOp = wgpu::StoreOp::Store;
	cDepthStencilAttachmentInfo.stencilLoadOp = wgpu::LoadOp::Clear;
	cDepthStencilAttachmentInfo.stencilStoreOp = wgpu::StoreOp::Store;

	colorAttachmentCount = static_cast<uint32_t>(colorAttachmentInfo.size());
	uint32_t colorAttachmentIndex = 0;
	for (const wgpu::TextureView& colorAttachment : colorAttachmentInfo) {
	if (colorAttachment.Get() != nullptr) {
	cColorAttachments[colorAttachmentIndex].view = colorAttachment;
	}
	++colorAttachmentIndex;
	}
	colorAttachments = cColorAttachments.data();

	if (depthStencil.Get() != nullptr) {
	cDepthStencilAttachmentInfo.view = depthStencil;
	depthStencilAttachment = &cDepthStencilAttachmentInfo;
	} else {
	depthStencilAttachment = nullptr;
	}
	}

	ComboRenderPassDescriptor::~ComboRenderPassDescriptor() = default;

	ComboRenderPassDescriptor::ComboRenderPassDescriptor(const ComboRenderPassDescriptor& other) {
	*this = other;
	}

	const ComboRenderPassDescriptor& ComboRenderPassDescriptor::operator=(
	const ComboRenderPassDescriptor& otherRenderPass) {
	cDepthStencilAttachmentInfo = otherRenderPass.cDepthStencilAttachmentInfo;
	cColorAttachments = otherRenderPass.cColorAttachments;
	colorAttachmentCount = otherRenderPass.colorAttachmentCount;

	colorAttachments = cColorAttachments.data();

	if (otherRenderPass.depthStencilAttachment != nullptr) {
	// Assign desc.depthStencilAttachment to this->depthStencilAttachmentInfo;
	depthStencilAttachment = &cDepthStencilAttachmentInfo;
	} else {
	depthStencilAttachment = nullptr;
	}

	return *this;
	}
	void ComboRenderPassDescriptor::UnsetDepthStencilLoadStoreOpsForFormat(wgpu::TextureFormat format) {
	switch (format) {
	case wgpu::TextureFormat::Depth24Plus:
	case wgpu::TextureFormat::Depth32Float:
	case wgpu::TextureFormat::Depth16Unorm:
	cDepthStencilAttachmentInfo.stencilLoadOp = wgpu::LoadOp::Undefined;
	cDepthStencilAttachmentInfo.stencilStoreOp = wgpu::StoreOp::Undefined;
	break;
	case wgpu::TextureFormat::Stencil8:
	cDepthStencilAttachmentInfo.depthLoadOp = wgpu::LoadOp::Undefined;
	cDepthStencilAttachmentInfo.depthStoreOp = wgpu::StoreOp::Undefined;
	break;
	default:
	break;
	}
	}

	BasicRenderPass::BasicRenderPass()
	: width(0),
	height(0),
	color(nullptr),
	colorFormat(wgpu::TextureFormat::RGBA8Unorm),
	renderPassInfo({}) {}

	BasicRenderPass::BasicRenderPass(uint32_t texWidth,
	uint32_t texHeight,
	wgpu::Texture colorAttachment,
	wgpu::TextureFormat textureFormat)
	: width(texWidth),
	height(texHeight),
	color(colorAttachment),
	colorFormat(textureFormat),
	renderPassInfo({colorAttachment.CreateView()}) {}

	BasicRenderPass CreateBasicRenderPass(const wgpu::Device& device,
	uint32_t width,
	uint32_t height,
	wgpu::TextureFormat format) {
	DAWN_ASSERT(width > 0 && height > 0);

	wgpu::TextureDescriptor descriptor;
	descriptor.dimension = wgpu::TextureDimension::e2D;
	descriptor.size.width = width;
	descriptor.size.height = height;
	descriptor.size.depthOrArrayLayers = 1;
	descriptor.sampleCount = 1;
	descriptor.format = format;
	descriptor.mipLevelCount = 1;
	descriptor.usage = wgpu::TextureUsage::RenderAttachment \| wgpu::TextureUsage::CopySrc;
	wgpu::Texture color = device.CreateTexture(&descriptor);

	return BasicRenderPass(width, height, color);
	}

	wgpu::ImageCopyBuffer CreateImageCopyBuffer(wgpu::Buffer buffer,
	uint64_t offset,
	uint32_t bytesPerRow,
	uint32_t rowsPerImage) {
	wgpu::ImageCopyBuffer imageCopyBuffer = {};
	imageCopyBuffer.buffer = buffer;
	imageCopyBuffer.layout = CreateTextureDataLayout(offset, bytesPerRow, rowsPerImage);

	return imageCopyBuffer;
	}

	wgpu::ImageCopyTexture CreateImageCopyTexture(wgpu::Texture texture,
	uint32_t mipLevel,
	wgpu::Origin3D origin,
	wgpu::TextureAspect aspect) {
	wgpu::ImageCopyTexture imageCopyTexture;
	imageCopyTexture.texture = texture;
	imageCopyTexture.mipLevel = mipLevel;
	imageCopyTexture.origin = origin;
	imageCopyTexture.aspect = aspect;

	return imageCopyTexture;
	}

	wgpu::TextureDataLayout CreateTextureDataLayout(uint64_t offset,
	uint32_t bytesPerRow,
	uint32_t rowsPerImage) {
	wgpu::TextureDataLayout textureDataLayout;
	textureDataLayout.offset = offset;
	textureDataLayout.bytesPerRow = bytesPerRow;
	textureDataLayout.rowsPerImage = rowsPerImage;

	return textureDataLayout;
	}

	wgpu::PipelineLayout MakeBasicPipelineLayout(const wgpu::Device& device,
	const wgpu::BindGroupLayout* bindGroupLayout) {
	wgpu::PipelineLayoutDescriptor descriptor;
	if (bindGroupLayout != nullptr) {
	descriptor.bindGroupLayoutCount = 1;
	descriptor.bindGroupLayouts = bindGroupLayout;
	} else {
	descriptor.bindGroupLayoutCount = 0;
	descriptor.bindGroupLayouts = nullptr;
	}
	return device.CreatePipelineLayout(&descriptor);
	}

	wgpu::PipelineLayout MakePipelineLayout(const wgpu::Device& device,
	std::vector<wgpu::BindGroupLayout> bgls) {
	wgpu::PipelineLayoutDescriptor descriptor;
	descriptor.bindGroupLayoutCount = uint32_t(bgls.size());
	descriptor.bindGroupLayouts = bgls.data();
	return device.CreatePipelineLayout(&descriptor);
	}

	wgpu::BindGroupLayout MakeBindGroupLayout(
	const wgpu::Device& device,
	std::initializer_list<BindingLayoutEntryInitializationHelper> entriesInitializer) {
	std::vector<wgpu::BindGroupLayoutEntry> entries;
	for (const BindingLayoutEntryInitializationHelper& entry : entriesInitializer) {
	entries.push_back(entry);
	}

	wgpu::BindGroupLayoutDescriptor descriptor;
	descriptor.entryCount = static_cast<uint32_t>(entries.size());
	descriptor.entries = entries.data();
	return device.CreateBindGroupLayout(&descriptor);
	}

	BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
	uint32_t entryBinding,
	wgpu::ShaderStage entryVisibility,
	wgpu::BufferBindingType bufferType,
	bool bufferHasDynamicOffset,
	uint64_t bufferMinBindingSize) {
	binding = entryBinding;
	visibility = entryVisibility;
	buffer.type = bufferType;
	buffer.hasDynamicOffset = bufferHasDynamicOffset;
	buffer.minBindingSize = bufferMinBindingSize;
	}

	BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
	uint32_t entryBinding,
	wgpu::ShaderStage entryVisibility,
	wgpu::SamplerBindingType samplerType) {
	binding = entryBinding;
	visibility = entryVisibility;
	sampler.type = samplerType;
	}

	BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
	uint32_t entryBinding,
	wgpu::ShaderStage entryVisibility,
	wgpu::TextureSampleType textureSampleType,
	wgpu::TextureViewDimension textureViewDimension,
	bool textureMultisampled) {
	binding = entryBinding;
	visibility = entryVisibility;
	texture.sampleType = textureSampleType;
	texture.viewDimension = textureViewDimension;
	texture.multisampled = textureMultisampled;
	}

	BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
	uint32_t entryBinding,
	wgpu::ShaderStage entryVisibility,
	wgpu::StorageTextureAccess storageTextureAccess,
	wgpu::TextureFormat format,
	wgpu::TextureViewDimension textureViewDimension) {
	binding = entryBinding;
	visibility = entryVisibility;
	storageTexture.access = storageTextureAccess;
	storageTexture.format = format;
	storageTexture.viewDimension = textureViewDimension;
	}

	// ExternalTextureBindingLayout never contains data, so just make one that can be reused instead
	// of declaring a new one every time it's needed.
	wgpu::ExternalTextureBindingLayout kExternalTextureBindingLayout = {};

	BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
	uint32_t entryBinding,
	wgpu::ShaderStage entryVisibility,
	wgpu::ExternalTextureBindingLayout* bindingLayout) {
	binding = entryBinding;
	visibility = entryVisibility;
	nextInChain = bindingLayout;
	}

	BindingLayoutEntryInitializationHelper::BindingLayoutEntryInitializationHelper(
	const wgpu::BindGroupLayoutEntry& entry)
	: wgpu::BindGroupLayoutEntry(entry) {}

	BindingInitializationHelper::BindingInitializationHelper(uint32_t binding,
	const wgpu::Sampler& sampler)
	: binding(binding), sampler(sampler) {}

	BindingInitializationHelper::BindingInitializationHelper(uint32_t binding,
	const wgpu::TextureView& textureView)
	: binding(binding), textureView(textureView) {}

	BindingInitializationHelper::BindingInitializationHelper(
	uint32_t binding,
	const wgpu::ExternalTexture& externalTexture)
	: binding(binding) {
	externalTextureBindingEntry.externalTexture = externalTexture;
	}

	BindingInitializationHelper::BindingInitializationHelper(uint32_t binding,
	const wgpu::Buffer& buffer,
	uint64_t offset,
	uint64_t size)
	: binding(binding), buffer(buffer), offset(offset), size(size) {}

	BindingInitializationHelper::BindingInitializationHelper(const BindingInitializationHelper&) =
	default;

	BindingInitializationHelper::~BindingInitializationHelper() = default;

	wgpu::BindGroupEntry BindingInitializationHelper::GetAsBinding() const {
	wgpu::BindGroupEntry result;

	result.binding = binding;
	result.sampler = sampler;
	result.textureView = textureView;
	result.buffer = buffer;
	result.offset = offset;
	result.size = size;
	if (externalTextureBindingEntry.externalTexture != nullptr) {
	result.nextInChain = &externalTextureBindingEntry;
	}

	return result;
	}

	wgpu::BindGroup MakeBindGroup(
	const wgpu::Device& device,
	const wgpu::BindGroupLayout& layout,
	std::initializer_list<BindingInitializationHelper> entriesInitializer) {
	std::vector<wgpu::BindGroupEntry> entries;
	for (const BindingInitializationHelper& helper : entriesInitializer) {
	entries.push_back(helper.GetAsBinding());
	}

	wgpu::BindGroupDescriptor descriptor;
	descriptor.layout = layout;
	descriptor.entryCount = checked_cast<uint32_t>(entries.size());
	descriptor.entries = entries.data();

	return device.CreateBindGroup(&descriptor);
	}

	ColorSpaceConversionInfo GetYUVBT709ToRGBSRGBColorSpaceConversionInfo() {
	ColorSpaceConversionInfo info;
	info.yuvToRgbConversionMatrix = kYuvToRGBMatrixBT709;
	info.gamutConversionMatrix = kGamutConversionMatrixBT709ToSrgb;
	info.srcTransferFunctionParameters = kGammaDecodeBT709;
	info.dstTransferFunctionParameters = kGammaEncodeSrgb;

	return info;
	}

	} // namespace utils