src/dawn_native/d3d12/RenderPipelineD3D12.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_native/d3d12/RenderPipelineD3D12.h"

 #include "common/Assert.h"
 #include "dawn_native/d3d12/DeviceD3D12.h"
 #include "dawn_native/d3d12/InputStateD3D12.h"
 #include "dawn_native/d3d12/PipelineLayoutD3D12.h"
 #include "dawn_native/d3d12/PlatformFunctions.h"
 #include "dawn_native/d3d12/ShaderModuleD3D12.h"
 #include "dawn_native/d3d12/TextureD3D12.h"
 #include "dawn_native/d3d12/UtilsD3D12.h"

 #include <d3dcompiler.h>

 namespace dawn_native { namespace d3d12 {

     namespace {
         D3D12_PRIMITIVE_TOPOLOGY D3D12PrimitiveTopology(dawn::PrimitiveTopology primitiveTopology) {
             switch (primitiveTopology) {
                 case dawn::PrimitiveTopology::PointList:
                     return D3D_PRIMITIVE_TOPOLOGY_POINTLIST;
                 case dawn::PrimitiveTopology::LineList:
                     return D3D_PRIMITIVE_TOPOLOGY_LINELIST;
                 case dawn::PrimitiveTopology::LineStrip:
                     return D3D_PRIMITIVE_TOPOLOGY_LINESTRIP;
                 case dawn::PrimitiveTopology::TriangleList:
                     return D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST;
                 case dawn::PrimitiveTopology::TriangleStrip:
                     return D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP;
                 default:
                     UNREACHABLE();
             }
         }

         D3D12_PRIMITIVE_TOPOLOGY_TYPE D3D12PrimitiveTopologyType(
             dawn::PrimitiveTopology primitiveTopology) {
             switch (primitiveTopology) {
                 case dawn::PrimitiveTopology::PointList:
                     return D3D12_PRIMITIVE_TOPOLOGY_TYPE_POINT;
                 case dawn::PrimitiveTopology::LineList:
                 case dawn::PrimitiveTopology::LineStrip:
                     return D3D12_PRIMITIVE_TOPOLOGY_TYPE_LINE;
                 case dawn::PrimitiveTopology::TriangleList:
                 case dawn::PrimitiveTopology::TriangleStrip:
                     return D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;
                 default:
                     UNREACHABLE();
             }
         }

         D3D12_BLEND D3D12Blend(dawn::BlendFactor factor) {
             switch (factor) {
                 case dawn::BlendFactor::Zero:
                     return D3D12_BLEND_ZERO;
                 case dawn::BlendFactor::One:
                     return D3D12_BLEND_ONE;
                 case dawn::BlendFactor::SrcColor:
                     return D3D12_BLEND_SRC_COLOR;
                 case dawn::BlendFactor::OneMinusSrcColor:
                     return D3D12_BLEND_INV_SRC_COLOR;
                 case dawn::BlendFactor::SrcAlpha:
                     return D3D12_BLEND_SRC_ALPHA;
                 case dawn::BlendFactor::OneMinusSrcAlpha:
                     return D3D12_BLEND_INV_SRC_ALPHA;
                 case dawn::BlendFactor::DstColor:
                     return D3D12_BLEND_DEST_COLOR;
                 case dawn::BlendFactor::OneMinusDstColor:
                     return D3D12_BLEND_INV_DEST_COLOR;
                 case dawn::BlendFactor::DstAlpha:
                     return D3D12_BLEND_DEST_ALPHA;
                 case dawn::BlendFactor::OneMinusDstAlpha:
                     return D3D12_BLEND_INV_DEST_ALPHA;
                 case dawn::BlendFactor::SrcAlphaSaturated:
                     return D3D12_BLEND_SRC_ALPHA_SAT;
                 case dawn::BlendFactor::BlendColor:
                     return D3D12_BLEND_BLEND_FACTOR;
                 case dawn::BlendFactor::OneMinusBlendColor:
                     return D3D12_BLEND_INV_BLEND_FACTOR;
                 default:
                     UNREACHABLE();
             }
         }

         D3D12_BLEND_OP D3D12BlendOperation(dawn::BlendOperation operation) {
             switch (operation) {
                 case dawn::BlendOperation::Add:
                     return D3D12_BLEND_OP_ADD;
                 case dawn::BlendOperation::Subtract:
                     return D3D12_BLEND_OP_SUBTRACT;
                 case dawn::BlendOperation::ReverseSubtract:
                     return D3D12_BLEND_OP_REV_SUBTRACT;
                 case dawn::BlendOperation::Min:
                     return D3D12_BLEND_OP_MIN;
                 case dawn::BlendOperation::Max:
                     return D3D12_BLEND_OP_MAX;
                 default:
                     UNREACHABLE();
             }
         }

         uint8_t D3D12RenderTargetWriteMask(dawn::ColorWriteMask colorWriteMask) {
             static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Red) ==
                               D3D12_COLOR_WRITE_ENABLE_RED,
                           "ColorWriteMask values must match");
             static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Green) ==
                               D3D12_COLOR_WRITE_ENABLE_GREEN,
                           "ColorWriteMask values must match");
             static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Blue) ==
                               D3D12_COLOR_WRITE_ENABLE_BLUE,
                           "ColorWriteMask values must match");
             static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Alpha) ==
                               D3D12_COLOR_WRITE_ENABLE_ALPHA,
                           "ColorWriteMask values must match");
             return static_cast<uint8_t>(colorWriteMask);
         }

         D3D12_RENDER_TARGET_BLEND_DESC ComputeColorDesc(const ColorStateDescriptor* descriptor) {
             D3D12_RENDER_TARGET_BLEND_DESC blendDesc;
             blendDesc.BlendEnable = BlendEnabled(descriptor);
             blendDesc.SrcBlend = D3D12Blend(descriptor->colorBlend.srcFactor);
             blendDesc.DestBlend = D3D12Blend(descriptor->colorBlend.dstFactor);
             blendDesc.BlendOp = D3D12BlendOperation(descriptor->colorBlend.operation);
             blendDesc.SrcBlendAlpha = D3D12Blend(descriptor->alphaBlend.srcFactor);
             blendDesc.DestBlendAlpha = D3D12Blend(descriptor->alphaBlend.dstFactor);
             blendDesc.BlendOpAlpha = D3D12BlendOperation(descriptor->alphaBlend.operation);
             blendDesc.RenderTargetWriteMask =
                 D3D12RenderTargetWriteMask(descriptor->colorWriteMask);
             blendDesc.LogicOpEnable = false;
             blendDesc.LogicOp = D3D12_LOGIC_OP_NOOP;
             return blendDesc;
         }

         D3D12_STENCIL_OP StencilOp(dawn::StencilOperation op) {
             switch (op) {
                 case dawn::StencilOperation::Keep:
                     return D3D12_STENCIL_OP_KEEP;
                 case dawn::StencilOperation::Zero:
                     return D3D12_STENCIL_OP_ZERO;
                 case dawn::StencilOperation::Replace:
                     return D3D12_STENCIL_OP_REPLACE;
                 case dawn::StencilOperation::IncrementClamp:
                     return D3D12_STENCIL_OP_INCR_SAT;
                 case dawn::StencilOperation::DecrementClamp:
                     return D3D12_STENCIL_OP_DECR_SAT;
                 case dawn::StencilOperation::Invert:
                     return D3D12_STENCIL_OP_INVERT;
                 case dawn::StencilOperation::IncrementWrap:
                     return D3D12_STENCIL_OP_INCR;
                 case dawn::StencilOperation::DecrementWrap:
                     return D3D12_STENCIL_OP_DECR;
                 default:
                     UNREACHABLE();
             }
         }

         D3D12_DEPTH_STENCILOP_DESC StencilOpDesc(const StencilStateFaceDescriptor descriptor) {
             D3D12_DEPTH_STENCILOP_DESC desc;

             desc.StencilFailOp = StencilOp(descriptor.failOp);
             desc.StencilDepthFailOp = StencilOp(descriptor.depthFailOp);
             desc.StencilPassOp = StencilOp(descriptor.passOp);
             desc.StencilFunc = ToD3D12ComparisonFunc(descriptor.compare);

             return desc;
         }

         D3D12_DEPTH_STENCIL_DESC ComputeDepthStencilDesc(
             const DepthStencilStateDescriptor* descriptor) {
             D3D12_DEPTH_STENCIL_DESC mDepthStencilDescriptor;
             mDepthStencilDescriptor.DepthEnable = TRUE;
             mDepthStencilDescriptor.DepthWriteMask = descriptor->depthWriteEnabled
                                                          ? D3D12_DEPTH_WRITE_MASK_ALL
                                                          : D3D12_DEPTH_WRITE_MASK_ZERO;
             mDepthStencilDescriptor.DepthFunc = ToD3D12ComparisonFunc(descriptor->depthCompare);

             mDepthStencilDescriptor.StencilEnable = StencilTestEnabled(descriptor) ? TRUE : FALSE;
             mDepthStencilDescriptor.StencilReadMask =
                 static_cast<UINT8>(descriptor->stencilReadMask);
             mDepthStencilDescriptor.StencilWriteMask =
                 static_cast<UINT8>(descriptor->stencilWriteMask);

             mDepthStencilDescriptor.FrontFace = StencilOpDesc(descriptor->stencilFront);
             mDepthStencilDescriptor.BackFace = StencilOpDesc(descriptor->stencilBack);
             return mDepthStencilDescriptor;
         }

     }  // anonymous namespace

     RenderPipeline::RenderPipeline(Device* device, const RenderPipelineDescriptor* descriptor)
         : RenderPipelineBase(device, descriptor),
           mD3d12PrimitiveTopology(D3D12PrimitiveTopology(GetPrimitiveTopology())) {
         uint32_t compileFlags = 0;
 #if defined(_DEBUG)
         // Enable better shader debugging with the graphics debugging tools.
         compileFlags |= D3DCOMPILE_DEBUG | D3DCOMPILE_SKIP_OPTIMIZATION;
 #endif
         // SPRIV-cross does matrix multiplication expecting row major matrices
         compileFlags |= D3DCOMPILE_PACK_MATRIX_ROW_MAJOR;

         D3D12_GRAPHICS_PIPELINE_STATE_DESC descriptorD3D12 = {};

         PerStage<ComPtr<ID3DBlob>> compiledShader;
         ComPtr<ID3DBlob> errors;

         dawn::ShaderStageBit renderStages =
             dawn::ShaderStageBit::Vertex | dawn::ShaderStageBit::Fragment;
         for (auto stage : IterateStages(renderStages)) {
             const ShaderModule* module = nullptr;
             const char* entryPoint = nullptr;
             const char* compileTarget = nullptr;
             D3D12_SHADER_BYTECODE* shader = nullptr;
             switch (stage) {
                 case dawn::ShaderStage::Vertex:
                     module = ToBackend(descriptor->vertexStage->module);
                     entryPoint = descriptor->vertexStage->entryPoint;
                     shader = &descriptorD3D12.VS;
                     compileTarget = "vs_5_1";
                     break;
                 case dawn::ShaderStage::Fragment:
                     module = ToBackend(descriptor->fragmentStage->module);
                     entryPoint = descriptor->fragmentStage->entryPoint;
                     shader = &descriptorD3D12.PS;
                     compileTarget = "ps_5_1";
                     break;
                 default:
                     UNREACHABLE();
                     break;
             }

             const std::string hlslSource = module->GetHLSLSource(ToBackend(GetLayout()));

             const PlatformFunctions* functions = device->GetFunctions();
             if (FAILED(functions->d3dCompile(hlslSource.c_str(), hlslSource.length(), nullptr,
                                              nullptr, nullptr, entryPoint, compileTarget,
                                              compileFlags, 0, &compiledShader[stage], &errors))) {
                 printf("%s\n", reinterpret_cast<char*>(errors->GetBufferPointer()));
                 ASSERT(false);
             }

             if (shader != nullptr) {
                 shader->pShaderBytecode = compiledShader[stage]->GetBufferPointer();
                 shader->BytecodeLength = compiledShader[stage]->GetBufferSize();
             }
         }

         PipelineLayout* layout = ToBackend(GetLayout());

         descriptorD3D12.pRootSignature = layout->GetRootSignature().Get();

         // D3D12 logs warnings if any empty input state is used
         InputState* inputState = ToBackend(GetInputState());
         if (inputState->GetAttributesSetMask().any()) {
             descriptorD3D12.InputLayout = inputState->GetD3D12InputLayoutDescriptor();
         }

         descriptorD3D12.RasterizerState.FillMode = D3D12_FILL_MODE_SOLID;
         descriptorD3D12.RasterizerState.CullMode = D3D12_CULL_MODE_NONE;
         descriptorD3D12.RasterizerState.FrontCounterClockwise = FALSE;
         descriptorD3D12.RasterizerState.DepthBias = D3D12_DEFAULT_DEPTH_BIAS;
         descriptorD3D12.RasterizerState.DepthBiasClamp = D3D12_DEFAULT_DEPTH_BIAS_CLAMP;
         descriptorD3D12.RasterizerState.SlopeScaledDepthBias =
             D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS;
         descriptorD3D12.RasterizerState.DepthClipEnable = TRUE;
         descriptorD3D12.RasterizerState.MultisampleEnable = FALSE;
         descriptorD3D12.RasterizerState.AntialiasedLineEnable = FALSE;
         descriptorD3D12.RasterizerState.ForcedSampleCount = 0;
         descriptorD3D12.RasterizerState.ConservativeRaster =
             D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF;

         if (HasDepthStencilAttachment()) {
             descriptorD3D12.DSVFormat = D3D12TextureFormat(GetDepthStencilFormat());
         }

         for (uint32_t i : IterateBitSet(GetColorAttachmentsMask())) {
             descriptorD3D12.RTVFormats[i] = D3D12TextureFormat(GetColorAttachmentFormat(i));
             descriptorD3D12.BlendState.RenderTarget[i] =
                 ComputeColorDesc(GetColorStateDescriptor(i));
         }
         descriptorD3D12.NumRenderTargets = static_cast<uint32_t>(GetColorAttachmentsMask().count());

         descriptorD3D12.BlendState.AlphaToCoverageEnable = FALSE;
         descriptorD3D12.BlendState.IndependentBlendEnable = TRUE;

         descriptorD3D12.DepthStencilState =
             ComputeDepthStencilDesc(GetDepthStencilStateDescriptor());

         descriptorD3D12.SampleMask = UINT_MAX;
         descriptorD3D12.PrimitiveTopologyType = D3D12PrimitiveTopologyType(GetPrimitiveTopology());
         descriptorD3D12.SampleDesc.Count = 1;

         ASSERT_SUCCESS(device->GetD3D12Device()->CreateGraphicsPipelineState(
             &descriptorD3D12, IID_PPV_ARGS(&mPipelineState)));
     }

     RenderPipeline::~RenderPipeline() {
         ToBackend(GetDevice())->ReferenceUntilUnused(mPipelineState);
     }

     D3D12_PRIMITIVE_TOPOLOGY RenderPipeline::GetD3D12PrimitiveTopology() const {
         return mD3d12PrimitiveTopology;
     }

     ComPtr<ID3D12PipelineState> RenderPipeline::GetPipelineState() {
         return mPipelineState;
     }

 }}  // namespace dawn_native::d3d12
	// 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_native/d3d12/RenderPipelineD3D12.h"

	#include "common/Assert.h"
	#include "dawn_native/d3d12/DeviceD3D12.h"
	#include "dawn_native/d3d12/InputStateD3D12.h"
	#include "dawn_native/d3d12/PipelineLayoutD3D12.h"
	#include "dawn_native/d3d12/PlatformFunctions.h"
	#include "dawn_native/d3d12/ShaderModuleD3D12.h"
	#include "dawn_native/d3d12/TextureD3D12.h"
	#include "dawn_native/d3d12/UtilsD3D12.h"

	#include <d3dcompiler.h>

	namespace dawn_native { namespace d3d12 {

	namespace {
	D3D12_PRIMITIVE_TOPOLOGY D3D12PrimitiveTopology(dawn::PrimitiveTopology primitiveTopology) {
	switch (primitiveTopology) {
	case dawn::PrimitiveTopology::PointList:
	return D3D_PRIMITIVE_TOPOLOGY_POINTLIST;
	case dawn::PrimitiveTopology::LineList:
	return D3D_PRIMITIVE_TOPOLOGY_LINELIST;
	case dawn::PrimitiveTopology::LineStrip:
	return D3D_PRIMITIVE_TOPOLOGY_LINESTRIP;
	case dawn::PrimitiveTopology::TriangleList:
	return D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST;
	case dawn::PrimitiveTopology::TriangleStrip:
	return D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP;
	default:
	UNREACHABLE();
	}
	}

	D3D12_PRIMITIVE_TOPOLOGY_TYPE D3D12PrimitiveTopologyType(
	dawn::PrimitiveTopology primitiveTopology) {
	switch (primitiveTopology) {
	case dawn::PrimitiveTopology::PointList:
	return D3D12_PRIMITIVE_TOPOLOGY_TYPE_POINT;
	case dawn::PrimitiveTopology::LineList:
	case dawn::PrimitiveTopology::LineStrip:
	return D3D12_PRIMITIVE_TOPOLOGY_TYPE_LINE;
	case dawn::PrimitiveTopology::TriangleList:
	case dawn::PrimitiveTopology::TriangleStrip:
	return D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;
	default:
	UNREACHABLE();
	}
	}

	D3D12_BLEND D3D12Blend(dawn::BlendFactor factor) {
	switch (factor) {
	case dawn::BlendFactor::Zero:
	return D3D12_BLEND_ZERO;
	case dawn::BlendFactor::One:
	return D3D12_BLEND_ONE;
	case dawn::BlendFactor::SrcColor:
	return D3D12_BLEND_SRC_COLOR;
	case dawn::BlendFactor::OneMinusSrcColor:
	return D3D12_BLEND_INV_SRC_COLOR;
	case dawn::BlendFactor::SrcAlpha:
	return D3D12_BLEND_SRC_ALPHA;
	case dawn::BlendFactor::OneMinusSrcAlpha:
	return D3D12_BLEND_INV_SRC_ALPHA;
	case dawn::BlendFactor::DstColor:
	return D3D12_BLEND_DEST_COLOR;
	case dawn::BlendFactor::OneMinusDstColor:
	return D3D12_BLEND_INV_DEST_COLOR;
	case dawn::BlendFactor::DstAlpha:
	return D3D12_BLEND_DEST_ALPHA;
	case dawn::BlendFactor::OneMinusDstAlpha:
	return D3D12_BLEND_INV_DEST_ALPHA;
	case dawn::BlendFactor::SrcAlphaSaturated:
	return D3D12_BLEND_SRC_ALPHA_SAT;
	case dawn::BlendFactor::BlendColor:
	return D3D12_BLEND_BLEND_FACTOR;
	case dawn::BlendFactor::OneMinusBlendColor:
	return D3D12_BLEND_INV_BLEND_FACTOR;
	default:
	UNREACHABLE();
	}
	}

	D3D12_BLEND_OP D3D12BlendOperation(dawn::BlendOperation operation) {
	switch (operation) {
	case dawn::BlendOperation::Add:
	return D3D12_BLEND_OP_ADD;
	case dawn::BlendOperation::Subtract:
	return D3D12_BLEND_OP_SUBTRACT;
	case dawn::BlendOperation::ReverseSubtract:
	return D3D12_BLEND_OP_REV_SUBTRACT;
	case dawn::BlendOperation::Min:
	return D3D12_BLEND_OP_MIN;
	case dawn::BlendOperation::Max:
	return D3D12_BLEND_OP_MAX;
	default:
	UNREACHABLE();
	}
	}

	uint8_t D3D12RenderTargetWriteMask(dawn::ColorWriteMask colorWriteMask) {
	static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Red) ==
	D3D12_COLOR_WRITE_ENABLE_RED,
	"ColorWriteMask values must match");
	static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Green) ==
	D3D12_COLOR_WRITE_ENABLE_GREEN,
	"ColorWriteMask values must match");
	static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Blue) ==
	D3D12_COLOR_WRITE_ENABLE_BLUE,
	"ColorWriteMask values must match");
	static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(dawn::ColorWriteMask::Alpha) ==
	D3D12_COLOR_WRITE_ENABLE_ALPHA,
	"ColorWriteMask values must match");
	return static_cast<uint8_t>(colorWriteMask);
	}

	D3D12_RENDER_TARGET_BLEND_DESC ComputeColorDesc(const ColorStateDescriptor* descriptor) {
	D3D12_RENDER_TARGET_BLEND_DESC blendDesc;
	blendDesc.BlendEnable = BlendEnabled(descriptor);
	blendDesc.SrcBlend = D3D12Blend(descriptor->colorBlend.srcFactor);
	blendDesc.DestBlend = D3D12Blend(descriptor->colorBlend.dstFactor);
	blendDesc.BlendOp = D3D12BlendOperation(descriptor->colorBlend.operation);
	blendDesc.SrcBlendAlpha = D3D12Blend(descriptor->alphaBlend.srcFactor);
	blendDesc.DestBlendAlpha = D3D12Blend(descriptor->alphaBlend.dstFactor);
	blendDesc.BlendOpAlpha = D3D12BlendOperation(descriptor->alphaBlend.operation);
	blendDesc.RenderTargetWriteMask =
	D3D12RenderTargetWriteMask(descriptor->colorWriteMask);
	blendDesc.LogicOpEnable = false;
	blendDesc.LogicOp = D3D12_LOGIC_OP_NOOP;
	return blendDesc;
	}

	D3D12_STENCIL_OP StencilOp(dawn::StencilOperation op) {
	switch (op) {
	case dawn::StencilOperation::Keep:
	return D3D12_STENCIL_OP_KEEP;
	case dawn::StencilOperation::Zero:
	return D3D12_STENCIL_OP_ZERO;
	case dawn::StencilOperation::Replace:
	return D3D12_STENCIL_OP_REPLACE;
	case dawn::StencilOperation::IncrementClamp:
	return D3D12_STENCIL_OP_INCR_SAT;
	case dawn::StencilOperation::DecrementClamp:
	return D3D12_STENCIL_OP_DECR_SAT;
	case dawn::StencilOperation::Invert:
	return D3D12_STENCIL_OP_INVERT;
	case dawn::StencilOperation::IncrementWrap:
	return D3D12_STENCIL_OP_INCR;
	case dawn::StencilOperation::DecrementWrap:
	return D3D12_STENCIL_OP_DECR;
	default:
	UNREACHABLE();
	}
	}

	D3D12_DEPTH_STENCILOP_DESC StencilOpDesc(const StencilStateFaceDescriptor descriptor) {
	D3D12_DEPTH_STENCILOP_DESC desc;

	desc.StencilFailOp = StencilOp(descriptor.failOp);
	desc.StencilDepthFailOp = StencilOp(descriptor.depthFailOp);
	desc.StencilPassOp = StencilOp(descriptor.passOp);
	desc.StencilFunc = ToD3D12ComparisonFunc(descriptor.compare);

	return desc;
	}

	D3D12_DEPTH_STENCIL_DESC ComputeDepthStencilDesc(
	const DepthStencilStateDescriptor* descriptor) {
	D3D12_DEPTH_STENCIL_DESC mDepthStencilDescriptor;
	mDepthStencilDescriptor.DepthEnable = TRUE;
	mDepthStencilDescriptor.DepthWriteMask = descriptor->depthWriteEnabled
	? D3D12_DEPTH_WRITE_MASK_ALL
	: D3D12_DEPTH_WRITE_MASK_ZERO;
	mDepthStencilDescriptor.DepthFunc = ToD3D12ComparisonFunc(descriptor->depthCompare);

	mDepthStencilDescriptor.StencilEnable = StencilTestEnabled(descriptor) ? TRUE : FALSE;
	mDepthStencilDescriptor.StencilReadMask =
	static_cast<UINT8>(descriptor->stencilReadMask);
	mDepthStencilDescriptor.StencilWriteMask =
	static_cast<UINT8>(descriptor->stencilWriteMask);

	mDepthStencilDescriptor.FrontFace = StencilOpDesc(descriptor->stencilFront);
	mDepthStencilDescriptor.BackFace = StencilOpDesc(descriptor->stencilBack);
	return mDepthStencilDescriptor;
	}

	} // anonymous namespace

	RenderPipeline::RenderPipeline(Device* device, const RenderPipelineDescriptor* descriptor)
	: RenderPipelineBase(device, descriptor),
	mD3d12PrimitiveTopology(D3D12PrimitiveTopology(GetPrimitiveTopology())) {
	uint32_t compileFlags = 0;
	#if defined(_DEBUG)
	// Enable better shader debugging with the graphics debugging tools.
	compileFlags \|= D3DCOMPILE_DEBUG \| D3DCOMPILE_SKIP_OPTIMIZATION;
	#endif
	// SPRIV-cross does matrix multiplication expecting row major matrices
	compileFlags \|= D3DCOMPILE_PACK_MATRIX_ROW_MAJOR;

	D3D12_GRAPHICS_PIPELINE_STATE_DESC descriptorD3D12 = {};

	PerStage<ComPtr<ID3DBlob>> compiledShader;
	ComPtr<ID3DBlob> errors;

	dawn::ShaderStageBit renderStages =
	dawn::ShaderStageBit::Vertex \| dawn::ShaderStageBit::Fragment;
	for (auto stage : IterateStages(renderStages)) {
	const ShaderModule* module = nullptr;
	const char* entryPoint = nullptr;
	const char* compileTarget = nullptr;
	D3D12_SHADER_BYTECODE* shader = nullptr;
	switch (stage) {
	case dawn::ShaderStage::Vertex:
	module = ToBackend(descriptor->vertexStage->module);
	entryPoint = descriptor->vertexStage->entryPoint;
	shader = &descriptorD3D12.VS;
	compileTarget = "vs_5_1";
	break;
	case dawn::ShaderStage::Fragment:
	module = ToBackend(descriptor->fragmentStage->module);
	entryPoint = descriptor->fragmentStage->entryPoint;
	shader = &descriptorD3D12.PS;
	compileTarget = "ps_5_1";
	break;
	default:
	UNREACHABLE();
	break;
	}

	const std::string hlslSource = module->GetHLSLSource(ToBackend(GetLayout()));

	const PlatformFunctions* functions = device->GetFunctions();
	if (FAILED(functions->d3dCompile(hlslSource.c_str(), hlslSource.length(), nullptr,
	nullptr, nullptr, entryPoint, compileTarget,
	compileFlags, 0, &compiledShader[stage], &errors))) {
	printf("%s\n", reinterpret_cast<char*>(errors->GetBufferPointer()));
	ASSERT(false);
	}

	if (shader != nullptr) {
	shader->pShaderBytecode = compiledShader[stage]->GetBufferPointer();
	shader->BytecodeLength = compiledShader[stage]->GetBufferSize();
	}
	}

	PipelineLayout* layout = ToBackend(GetLayout());

	descriptorD3D12.pRootSignature = layout->GetRootSignature().Get();

	// D3D12 logs warnings if any empty input state is used
	InputState* inputState = ToBackend(GetInputState());
	if (inputState->GetAttributesSetMask().any()) {
	descriptorD3D12.InputLayout = inputState->GetD3D12InputLayoutDescriptor();
	}

	descriptorD3D12.RasterizerState.FillMode = D3D12_FILL_MODE_SOLID;
	descriptorD3D12.RasterizerState.CullMode = D3D12_CULL_MODE_NONE;
	descriptorD3D12.RasterizerState.FrontCounterClockwise = FALSE;
	descriptorD3D12.RasterizerState.DepthBias = D3D12_DEFAULT_DEPTH_BIAS;
	descriptorD3D12.RasterizerState.DepthBiasClamp = D3D12_DEFAULT_DEPTH_BIAS_CLAMP;
	descriptorD3D12.RasterizerState.SlopeScaledDepthBias =
	D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS;
	descriptorD3D12.RasterizerState.DepthClipEnable = TRUE;
	descriptorD3D12.RasterizerState.MultisampleEnable = FALSE;
	descriptorD3D12.RasterizerState.AntialiasedLineEnable = FALSE;
	descriptorD3D12.RasterizerState.ForcedSampleCount = 0;
	descriptorD3D12.RasterizerState.ConservativeRaster =
	D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF;

	if (HasDepthStencilAttachment()) {
	descriptorD3D12.DSVFormat = D3D12TextureFormat(GetDepthStencilFormat());
	}

	for (uint32_t i : IterateBitSet(GetColorAttachmentsMask())) {
	descriptorD3D12.RTVFormats[i] = D3D12TextureFormat(GetColorAttachmentFormat(i));
	descriptorD3D12.BlendState.RenderTarget[i] =
	ComputeColorDesc(GetColorStateDescriptor(i));
	}
	descriptorD3D12.NumRenderTargets = static_cast<uint32_t>(GetColorAttachmentsMask().count());

	descriptorD3D12.BlendState.AlphaToCoverageEnable = FALSE;
	descriptorD3D12.BlendState.IndependentBlendEnable = TRUE;

	descriptorD3D12.DepthStencilState =
	ComputeDepthStencilDesc(GetDepthStencilStateDescriptor());

	descriptorD3D12.SampleMask = UINT_MAX;
	descriptorD3D12.PrimitiveTopologyType = D3D12PrimitiveTopologyType(GetPrimitiveTopology());
	descriptorD3D12.SampleDesc.Count = 1;

	ASSERT_SUCCESS(device->GetD3D12Device()->CreateGraphicsPipelineState(
	&descriptorD3D12, IID_PPV_ARGS(&mPipelineState)));
	}

	RenderPipeline::~RenderPipeline() {
	ToBackend(GetDevice())->ReferenceUntilUnused(mPipelineState);
	}

	D3D12_PRIMITIVE_TOPOLOGY RenderPipeline::GetD3D12PrimitiveTopology() const {
	return mD3d12PrimitiveTopology;
	}

	ComPtr<ID3D12PipelineState> RenderPipeline::GetPipelineState() {
	return mPipelineState;
	}

	}} // namespace dawn_native::d3d12