src/Vulkan/VkPipeline.cpp - SwiftShader - Git at Google

 // Copyright 2018 The SwiftShader Authors. All Rights Reserved.
 //
 // 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 "VkPipeline.hpp"
 #include "VkShaderModule.hpp"
 #include "Pipeline/SpirvShader.hpp"

 #include "spirv-tools/optimizer.hpp"

 namespace
 {

 sw::DrawType Convert(VkPrimitiveTopology topology)
 {
 	switch(topology)
 	{
 	case VK_PRIMITIVE_TOPOLOGY_POINT_LIST:
 		return sw::DRAW_POINTLIST;
 	case VK_PRIMITIVE_TOPOLOGY_LINE_LIST:
 		return sw::DRAW_LINELIST;
 	case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP:
 		return sw::DRAW_LINESTRIP;
 	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST:
 		return sw::DRAW_TRIANGLELIST;
 	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP:
 		return sw::DRAW_TRIANGLESTRIP;
 	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN:
 		return sw::DRAW_TRIANGLEFAN;
 	case VK_PRIMITIVE_TOPOLOGY_LINE_LIST_WITH_ADJACENCY:
 	case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP_WITH_ADJACENCY:
 	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST_WITH_ADJACENCY:
 	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP_WITH_ADJACENCY:
 		// geometry shader specific
 		ASSERT(false);
 		break;
 	case VK_PRIMITIVE_TOPOLOGY_PATCH_LIST:
 		// tesselation shader specific
 		ASSERT(false);
 		break;
 	default:
 		UNIMPLEMENTED();
 	}

 	return sw::DRAW_TRIANGLELIST;
 }

 sw::Rect Convert(const VkRect2D& rect)
 {
 	return sw::Rect(rect.offset.x, rect.offset.y, rect.offset.x + rect.extent.width, rect.offset.y + rect.extent.height);
 }

 sw::StreamType getStreamType(VkFormat format)
 {
 	switch(format)
 	{
 	case VK_FORMAT_R8_UNORM:
 	case VK_FORMAT_R8G8_UNORM:
 	case VK_FORMAT_R8G8B8A8_UNORM:
 	case VK_FORMAT_R8_UINT:
 	case VK_FORMAT_R8G8_UINT:
 	case VK_FORMAT_R8G8B8A8_UINT:
 	case VK_FORMAT_B8G8R8A8_UNORM:
 	case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
 	case VK_FORMAT_A8B8G8R8_UINT_PACK32:
 		return sw::STREAMTYPE_BYTE;
 	case VK_FORMAT_R8_SNORM:
 	case VK_FORMAT_R8_SINT:
 	case VK_FORMAT_R8G8_SNORM:
 	case VK_FORMAT_R8G8_SINT:
 	case VK_FORMAT_R8G8B8A8_SNORM:
 	case VK_FORMAT_R8G8B8A8_SINT:
 	case VK_FORMAT_A8B8G8R8_SNORM_PACK32:
 	case VK_FORMAT_A8B8G8R8_SINT_PACK32:
 		return sw::STREAMTYPE_SBYTE;
 	case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
 		return sw::STREAMTYPE_2_10_10_10_UINT;
 	case VK_FORMAT_R16_UNORM:
 	case VK_FORMAT_R16_UINT:
 	case VK_FORMAT_R16G16_UNORM:
 	case VK_FORMAT_R16G16_UINT:
 	case VK_FORMAT_R16G16B16A16_UNORM:
 	case VK_FORMAT_R16G16B16A16_UINT:
 		return sw::STREAMTYPE_USHORT;
 	case VK_FORMAT_R16_SNORM:
 	case VK_FORMAT_R16_SINT:
 	case VK_FORMAT_R16G16_SNORM:
 	case VK_FORMAT_R16G16_SINT:
 	case VK_FORMAT_R16G16B16A16_SNORM:
 	case VK_FORMAT_R16G16B16A16_SINT:
 		return sw::STREAMTYPE_SHORT;
 	case VK_FORMAT_R16_SFLOAT:
 	case VK_FORMAT_R16G16_SFLOAT:
 	case VK_FORMAT_R16G16B16A16_SFLOAT:
 		return sw::STREAMTYPE_HALF;
 	case VK_FORMAT_R32_UINT:
 	case VK_FORMAT_R32G32_UINT:
 	case VK_FORMAT_R32G32B32_UINT:
 	case VK_FORMAT_R32G32B32A32_UINT:
 		return sw::STREAMTYPE_UINT;
 	case VK_FORMAT_R32_SINT:
 	case VK_FORMAT_R32G32_SINT:
 	case VK_FORMAT_R32G32B32_SINT:
 	case VK_FORMAT_R32G32B32A32_SINT:
 		return sw::STREAMTYPE_INT;
 	case VK_FORMAT_R32_SFLOAT:
 	case VK_FORMAT_R32G32_SFLOAT:
 	case VK_FORMAT_R32G32B32_SFLOAT:
 	case VK_FORMAT_R32G32B32A32_SFLOAT:
 		return sw::STREAMTYPE_FLOAT;
 	default:
 		UNIMPLEMENTED();
 	}

 	return sw::STREAMTYPE_BYTE;
 }

 uint32_t getNumberOfChannels(VkFormat format)
 {
 	switch(format)
 	{
 	case VK_FORMAT_R8_UNORM:
 	case VK_FORMAT_R8_SNORM:
 	case VK_FORMAT_R8_UINT:
 	case VK_FORMAT_R8_SINT:
 	case VK_FORMAT_R16_UNORM:
 	case VK_FORMAT_R16_SNORM:
 	case VK_FORMAT_R16_UINT:
 	case VK_FORMAT_R16_SINT:
 	case VK_FORMAT_R16_SFLOAT:
 	case VK_FORMAT_R32_UINT:
 	case VK_FORMAT_R32_SINT:
 	case VK_FORMAT_R32_SFLOAT:
 		return 1;
 	case VK_FORMAT_R8G8_UNORM:
 	case VK_FORMAT_R8G8_SNORM:
 	case VK_FORMAT_R8G8_UINT:
 	case VK_FORMAT_R8G8_SINT:
 	case VK_FORMAT_R16G16_UNORM:
 	case VK_FORMAT_R16G16_SNORM:
 	case VK_FORMAT_R16G16_UINT:
 	case VK_FORMAT_R16G16_SINT:
 	case VK_FORMAT_R16G16_SFLOAT:
 	case VK_FORMAT_R32G32_UINT:
 	case VK_FORMAT_R32G32_SINT:
 	case VK_FORMAT_R32G32_SFLOAT:
 		return 2;
 	case VK_FORMAT_R32G32B32_UINT:
 	case VK_FORMAT_R32G32B32_SINT:
 	case VK_FORMAT_R32G32B32_SFLOAT:
 		return 3;
 	case VK_FORMAT_R8G8B8A8_UNORM:
 	case VK_FORMAT_R8G8B8A8_SNORM:
 	case VK_FORMAT_R8G8B8A8_UINT:
 	case VK_FORMAT_R8G8B8A8_SINT:
 	case VK_FORMAT_B8G8R8A8_UNORM:
 	case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
 	case VK_FORMAT_A8B8G8R8_SNORM_PACK32:
 	case VK_FORMAT_A8B8G8R8_UINT_PACK32:
 	case VK_FORMAT_A8B8G8R8_SINT_PACK32:
 	case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
 	case VK_FORMAT_R16G16B16A16_UNORM:
 	case VK_FORMAT_R16G16B16A16_SNORM:
 	case VK_FORMAT_R16G16B16A16_UINT:
 	case VK_FORMAT_R16G16B16A16_SINT:
 	case VK_FORMAT_R16G16B16A16_SFLOAT:
 	case VK_FORMAT_R32G32B32A32_UINT:
 	case VK_FORMAT_R32G32B32A32_SINT:
 	case VK_FORMAT_R32G32B32A32_SFLOAT:
 		return 4;
 	default:
 		UNIMPLEMENTED();
 	}

 	return 0;
 }

 }

 namespace vk
 {

 GraphicsPipeline::GraphicsPipeline(const VkGraphicsPipelineCreateInfo* pCreateInfo, void* mem)
 {
 	if((pCreateInfo->flags != 0) ||
 	   (pCreateInfo->stageCount != 2) ||
 	   (pCreateInfo->pTessellationState != nullptr) ||
 	   (pCreateInfo->pDynamicState != nullptr) ||
 	   (pCreateInfo->subpass != 0) ||
 	   (pCreateInfo->basePipelineHandle != VK_NULL_HANDLE) ||
 	   (pCreateInfo->basePipelineIndex != 0))
 	{
 		UNIMPLEMENTED();
 	}

 	const VkPipelineShaderStageCreateInfo& vertexStage = pCreateInfo->pStages[0];
 	if((vertexStage.stage != VK_SHADER_STAGE_VERTEX_BIT) ||
 	   (vertexStage.flags != 0) ||
 	   !((vertexStage.pSpecializationInfo == nullptr) ||
 	     ((vertexStage.pSpecializationInfo->mapEntryCount == 0) &&
 	      (vertexStage.pSpecializationInfo->dataSize == 0))))
 	{
 		UNIMPLEMENTED();
 	}

 	const VkPipelineShaderStageCreateInfo& fragmentStage = pCreateInfo->pStages[1];
 	if((fragmentStage.stage != VK_SHADER_STAGE_FRAGMENT_BIT) ||
 	   (fragmentStage.flags != 0) ||
 	   !((fragmentStage.pSpecializationInfo == nullptr) ||
 	     ((fragmentStage.pSpecializationInfo->mapEntryCount == 0) &&
 	      (fragmentStage.pSpecializationInfo->dataSize == 0))))
 	{
 		UNIMPLEMENTED();
 	}

 	const VkPipelineVertexInputStateCreateInfo* vertexInputState = pCreateInfo->pVertexInputState;
 	if(vertexInputState->flags != 0)
 	{
 		UNIMPLEMENTED();
 	}

 	// Temporary in-binding-order representation of buffer strides, to be consumed below
 	// when considering attributes. TODO: unfuse buffers from attributes in backend, is old GL model.
 	uint32_t bufferStrides[MAX_VERTEX_INPUT_BINDINGS];
 	for(uint32_t i = 0; i < vertexInputState->vertexBindingDescriptionCount; i++)
 	{
 		auto const & desc = vertexInputState->pVertexBindingDescriptions[i];
 		bufferStrides[desc.binding] = desc.stride;
 		if(desc.inputRate != VK_VERTEX_INPUT_RATE_VERTEX)
 		{
 			UNIMPLEMENTED();
 		}
 	}

 	for(uint32_t i = 0; i < vertexInputState->vertexAttributeDescriptionCount; i++)
 	{
 		auto const & desc = vertexInputState->pVertexAttributeDescriptions[i];
 		sw::Stream& input = context.input[desc.location];
 		input.count = getNumberOfChannels(desc.format);
 		input.type = getStreamType(desc.format);
 		input.normalized = !sw::Surface::isNonNormalizedInteger(desc.format);
 		input.offset = desc.offset;
 		input.binding = desc.binding;
 		input.stride = bufferStrides[desc.binding];
 	}

 	const VkPipelineInputAssemblyStateCreateInfo* assemblyState = pCreateInfo->pInputAssemblyState;
 	if((assemblyState->flags != 0) ||
 	   (assemblyState->primitiveRestartEnable != 0))
 	{
 		UNIMPLEMENTED();
 	}

 	context.drawType = Convert(assemblyState->topology);

 	const VkPipelineViewportStateCreateInfo* viewportState = pCreateInfo->pViewportState;
 	if(viewportState)
 	{
 		if((viewportState->flags != 0) ||
 			(viewportState->viewportCount != 1) ||
 			(viewportState->scissorCount != 1))
 		{
 			UNIMPLEMENTED();
 		}

 		scissor = Convert(viewportState->pScissors[0]);
 		viewport = viewportState->pViewports[0];
 	}

 	const VkPipelineRasterizationStateCreateInfo* rasterizationState = pCreateInfo->pRasterizationState;
 	if((rasterizationState->flags != 0) ||
 	   (rasterizationState->depthClampEnable != 0) ||
 	   (rasterizationState->polygonMode != VK_POLYGON_MODE_FILL))
 	{
 		UNIMPLEMENTED();
 	}

 	context.rasterizerDiscard = rasterizationState->rasterizerDiscardEnable;
 	context.cullMode = rasterizationState->cullMode;
 	context.frontFacingCCW = rasterizationState->frontFace == VK_FRONT_FACE_COUNTER_CLOCKWISE;
 	context.depthBias = (rasterizationState->depthBiasEnable ? rasterizationState->depthBiasConstantFactor : 0.0f);
 	context.slopeDepthBias = (rasterizationState->depthBiasEnable ? rasterizationState->depthBiasSlopeFactor : 0.0f);

 	const VkPipelineMultisampleStateCreateInfo* multisampleState = pCreateInfo->pMultisampleState;
 	if(multisampleState)
 	{
 		if((multisampleState->flags != 0) ||
 			(multisampleState->rasterizationSamples != VK_SAMPLE_COUNT_1_BIT) ||
 			(multisampleState->sampleShadingEnable != 0) ||
 			!((multisampleState->pSampleMask == nullptr) ||
 			(*(multisampleState->pSampleMask) == 0xFFFFFFFFu)) ||
 				(multisampleState->alphaToCoverageEnable != 0) ||
 			(multisampleState->alphaToOneEnable != 0))
 		{
 			UNIMPLEMENTED();
 		}
 	}

 	const VkPipelineDepthStencilStateCreateInfo* depthStencilState = pCreateInfo->pDepthStencilState;
 	if(depthStencilState)
 	{
 		if((depthStencilState->flags != 0) ||
 		   (depthStencilState->depthBoundsTestEnable != 0) ||
 		   (depthStencilState->minDepthBounds != 0.0f) ||
 		   (depthStencilState->maxDepthBounds != 1.0f))
 		{
 			UNIMPLEMENTED();
 		}

 		context.depthBufferEnable = depthStencilState->depthTestEnable;
 		context.depthWriteEnable = depthStencilState->depthWriteEnable;
 		context.depthCompareMode = depthStencilState->depthCompareOp;

 		context.stencilEnable = context.twoSidedStencil = depthStencilState->stencilTestEnable;
 		if(context.stencilEnable)
 		{
 			context.stencilMask = depthStencilState->front.compareMask;
 			context.stencilCompareMode = depthStencilState->front.compareOp;
 			context.stencilZFailOperation = depthStencilState->front.depthFailOp;
 			context.stencilFailOperation = depthStencilState->front.failOp;
 			context.stencilPassOperation = depthStencilState->front.passOp;
 			context.stencilReference = depthStencilState->front.reference;
 			context.stencilWriteMask = depthStencilState->front.writeMask;

 			context.stencilMaskCCW = depthStencilState->back.compareMask;
 			context.stencilCompareModeCCW = depthStencilState->back.compareOp;
 			context.stencilZFailOperationCCW = depthStencilState->back.depthFailOp;
 			context.stencilFailOperationCCW = depthStencilState->back.failOp;
 			context.stencilPassOperationCCW = depthStencilState->back.passOp;
 			context.stencilReferenceCCW = depthStencilState->back.reference;
 			context.stencilWriteMaskCCW = depthStencilState->back.writeMask;
 		}
 	}

 	const VkPipelineColorBlendStateCreateInfo* colorBlendState = pCreateInfo->pColorBlendState;
 	if(colorBlendState)
 	{
 		if((colorBlendState->flags != 0) ||
 		   ((colorBlendState->logicOpEnable != 0) &&
 			(colorBlendState->attachmentCount > 1)))
 		{
 			UNIMPLEMENTED();
 		}

 		context.colorLogicOpEnabled = colorBlendState->logicOpEnable;
 		context.logicalOperation = colorBlendState->logicOp;
 		blendConstants.r = colorBlendState->blendConstants[0];
 		blendConstants.g = colorBlendState->blendConstants[1];
 		blendConstants.b = colorBlendState->blendConstants[2];
 		blendConstants.a = colorBlendState->blendConstants[3];

 		if(colorBlendState->attachmentCount == 1)
 		{
 			const VkPipelineColorBlendAttachmentState& attachment = colorBlendState->pAttachments[0];
 			if(attachment.colorWriteMask != (VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT))
 			{
 				UNIMPLEMENTED();
 			}

 			context.alphaBlendEnable = attachment.blendEnable;
 			context.separateAlphaBlendEnable = (attachment.alphaBlendOp != attachment.colorBlendOp) ||
 											   (attachment.dstAlphaBlendFactor != attachment.dstColorBlendFactor) ||
 											   (attachment.srcAlphaBlendFactor != attachment.srcColorBlendFactor);
 			context.blendOperationStateAlpha = attachment.alphaBlendOp;
 			context.blendOperationState = attachment.colorBlendOp;
 			context.destBlendFactorStateAlpha = attachment.dstAlphaBlendFactor;
 			context.destBlendFactorState = attachment.dstColorBlendFactor;
 			context.sourceBlendFactorStateAlpha = attachment.srcAlphaBlendFactor;
 			context.sourceBlendFactorState = attachment.srcColorBlendFactor;
 		}
 	}
 }

 void GraphicsPipeline::destroyPipeline(const VkAllocationCallbacks* pAllocator)
 {
 	delete vertexShader;
 	delete fragmentShader;
 }

 size_t GraphicsPipeline::ComputeRequiredAllocationSize(const VkGraphicsPipelineCreateInfo* pCreateInfo)
 {
 	return 0;
 }

 void GraphicsPipeline::compileShaders(const VkAllocationCallbacks* pAllocator, const VkGraphicsPipelineCreateInfo* pCreateInfo)
 {
 	for (auto pStage = pCreateInfo->pStages; pStage != pCreateInfo->pStages + pCreateInfo->stageCount; pStage++)
 	{
 		auto module = Cast(pStage->module);

 		auto code = module->getCode();
 		spvtools::Optimizer opt{SPV_ENV_VULKAN_1_1};
 		opt.RegisterPass(spvtools::CreateInlineExhaustivePass());

 		// If the pipeline uses specialization, apply the specializations before freezing
 		if (pStage->pSpecializationInfo)
 		{
 			std::unordered_map<uint32_t, std::vector<uint32_t>> specializations;
 			for (auto i = 0u; i < pStage->pSpecializationInfo->mapEntryCount; ++i)
 			{
 				auto const &e = pStage->pSpecializationInfo->pMapEntries[i];
 				auto value_ptr =
 						static_cast<uint32_t const *>(pStage->pSpecializationInfo->pData) + e.offset / sizeof(uint32_t);
 				specializations.emplace(e.constantID,
 										std::vector<uint32_t>{value_ptr, value_ptr + e.size / sizeof(uint32_t)});
 			}
 			opt.RegisterPass(spvtools::CreateSetSpecConstantDefaultValuePass(specializations));
 		}
 		// Freeze specialization constants into normal constants, and propagate through
 		opt.RegisterPass(spvtools::CreateFreezeSpecConstantValuePass());
 		opt.RegisterPass(spvtools::CreateFoldSpecConstantOpAndCompositePass());

 		std::vector<uint32_t> postOptCode;
 		opt.Run(code.data(), code.size(), &postOptCode);

 		// TODO: also pass in any pipeline state which will affect shader compilation
 		auto spirvShader = new sw::SpirvShader{postOptCode};

 		switch (pStage->stage)
 		{
 		case VK_SHADER_STAGE_VERTEX_BIT:
 			context.vertexShader = vertexShader = spirvShader;
 			break;

 		case VK_SHADER_STAGE_FRAGMENT_BIT:
 			context.pixelShader = fragmentShader = spirvShader;
 			break;

 		default:
 			UNIMPLEMENTED("Unsupported stage");
 		}
 	}
 }

 uint32_t GraphicsPipeline::computePrimitiveCount(uint32_t vertexCount) const
 {
 	switch(context.drawType)
 	{
 	case sw::DRAW_POINTLIST:
 		return vertexCount;
 	case sw::DRAW_LINELIST:
 		return vertexCount / 2;
 	case sw::DRAW_LINESTRIP:
 		return vertexCount - 1;
 	case sw::DRAW_TRIANGLELIST:
 		return vertexCount / 3;
 	case sw::DRAW_TRIANGLESTRIP:
 		return vertexCount - 2;
 	case sw::DRAW_TRIANGLEFAN:
 		return vertexCount - 2;
 	default:
 		UNIMPLEMENTED();
 	}

 	return 0;
 }

 const sw::Context& GraphicsPipeline::getContext() const
 {
 	return context;
 }

 const sw::Rect& GraphicsPipeline::getScissor() const
 {
 	return scissor;
 }

 const VkViewport& GraphicsPipeline::getViewport() const
 {
 	return viewport;
 }

 const sw::Color<float>& GraphicsPipeline::getBlendConstants() const
 {
 	return blendConstants;
 }

 ComputePipeline::ComputePipeline(const VkComputePipelineCreateInfo* pCreateInfo, void* mem)
 {
 }

 void ComputePipeline::destroyPipeline(const VkAllocationCallbacks* pAllocator)
 {
 }

 size_t ComputePipeline::ComputeRequiredAllocationSize(const VkComputePipelineCreateInfo* pCreateInfo)
 {
 	return 0;
 }

 } // namespace vk
	// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
	//
	// 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 "VkPipeline.hpp"
	#include "VkShaderModule.hpp"
	#include "Pipeline/SpirvShader.hpp"

	#include "spirv-tools/optimizer.hpp"

	namespace
	{

	sw::DrawType Convert(VkPrimitiveTopology topology)
	{
	switch(topology)
	{
	case VK_PRIMITIVE_TOPOLOGY_POINT_LIST:
	return sw::DRAW_POINTLIST;
	case VK_PRIMITIVE_TOPOLOGY_LINE_LIST:
	return sw::DRAW_LINELIST;
	case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP:
	return sw::DRAW_LINESTRIP;
	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST:
	return sw::DRAW_TRIANGLELIST;
	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP:
	return sw::DRAW_TRIANGLESTRIP;
	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN:
	return sw::DRAW_TRIANGLEFAN;
	case VK_PRIMITIVE_TOPOLOGY_LINE_LIST_WITH_ADJACENCY:
	case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP_WITH_ADJACENCY:
	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST_WITH_ADJACENCY:
	case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP_WITH_ADJACENCY:
	// geometry shader specific
	ASSERT(false);
	break;
	case VK_PRIMITIVE_TOPOLOGY_PATCH_LIST:
	// tesselation shader specific
	ASSERT(false);
	break;
	default:
	UNIMPLEMENTED();
	}

	return sw::DRAW_TRIANGLELIST;
	}

	sw::Rect Convert(const VkRect2D& rect)
	{
	return sw::Rect(rect.offset.x, rect.offset.y, rect.offset.x + rect.extent.width, rect.offset.y + rect.extent.height);
	}

	sw::StreamType getStreamType(VkFormat format)
	{
	switch(format)
	{
	case VK_FORMAT_R8_UNORM:
	case VK_FORMAT_R8G8_UNORM:
	case VK_FORMAT_R8G8B8A8_UNORM:
	case VK_FORMAT_R8_UINT:
	case VK_FORMAT_R8G8_UINT:
	case VK_FORMAT_R8G8B8A8_UINT:
	case VK_FORMAT_B8G8R8A8_UNORM:
	case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
	case VK_FORMAT_A8B8G8R8_UINT_PACK32:
	return sw::STREAMTYPE_BYTE;
	case VK_FORMAT_R8_SNORM:
	case VK_FORMAT_R8_SINT:
	case VK_FORMAT_R8G8_SNORM:
	case VK_FORMAT_R8G8_SINT:
	case VK_FORMAT_R8G8B8A8_SNORM:
	case VK_FORMAT_R8G8B8A8_SINT:
	case VK_FORMAT_A8B8G8R8_SNORM_PACK32:
	case VK_FORMAT_A8B8G8R8_SINT_PACK32:
	return sw::STREAMTYPE_SBYTE;
	case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
	return sw::STREAMTYPE_2_10_10_10_UINT;
	case VK_FORMAT_R16_UNORM:
	case VK_FORMAT_R16_UINT:
	case VK_FORMAT_R16G16_UNORM:
	case VK_FORMAT_R16G16_UINT:
	case VK_FORMAT_R16G16B16A16_UNORM:
	case VK_FORMAT_R16G16B16A16_UINT:
	return sw::STREAMTYPE_USHORT;
	case VK_FORMAT_R16_SNORM:
	case VK_FORMAT_R16_SINT:
	case VK_FORMAT_R16G16_SNORM:
	case VK_FORMAT_R16G16_SINT:
	case VK_FORMAT_R16G16B16A16_SNORM:
	case VK_FORMAT_R16G16B16A16_SINT:
	return sw::STREAMTYPE_SHORT;
	case VK_FORMAT_R16_SFLOAT:
	case VK_FORMAT_R16G16_SFLOAT:
	case VK_FORMAT_R16G16B16A16_SFLOAT:
	return sw::STREAMTYPE_HALF;
	case VK_FORMAT_R32_UINT:
	case VK_FORMAT_R32G32_UINT:
	case VK_FORMAT_R32G32B32_UINT:
	case VK_FORMAT_R32G32B32A32_UINT:
	return sw::STREAMTYPE_UINT;
	case VK_FORMAT_R32_SINT:
	case VK_FORMAT_R32G32_SINT:
	case VK_FORMAT_R32G32B32_SINT:
	case VK_FORMAT_R32G32B32A32_SINT:
	return sw::STREAMTYPE_INT;
	case VK_FORMAT_R32_SFLOAT:
	case VK_FORMAT_R32G32_SFLOAT:
	case VK_FORMAT_R32G32B32_SFLOAT:
	case VK_FORMAT_R32G32B32A32_SFLOAT:
	return sw::STREAMTYPE_FLOAT;
	default:
	UNIMPLEMENTED();
	}

	return sw::STREAMTYPE_BYTE;
	}

	uint32_t getNumberOfChannels(VkFormat format)
	{
	switch(format)
	{
	case VK_FORMAT_R8_UNORM:
	case VK_FORMAT_R8_SNORM:
	case VK_FORMAT_R8_UINT:
	case VK_FORMAT_R8_SINT:
	case VK_FORMAT_R16_UNORM:
	case VK_FORMAT_R16_SNORM:
	case VK_FORMAT_R16_UINT:
	case VK_FORMAT_R16_SINT:
	case VK_FORMAT_R16_SFLOAT:
	case VK_FORMAT_R32_UINT:
	case VK_FORMAT_R32_SINT:
	case VK_FORMAT_R32_SFLOAT:
	return 1;
	case VK_FORMAT_R8G8_UNORM:
	case VK_FORMAT_R8G8_SNORM:
	case VK_FORMAT_R8G8_UINT:
	case VK_FORMAT_R8G8_SINT:
	case VK_FORMAT_R16G16_UNORM:
	case VK_FORMAT_R16G16_SNORM:
	case VK_FORMAT_R16G16_UINT:
	case VK_FORMAT_R16G16_SINT:
	case VK_FORMAT_R16G16_SFLOAT:
	case VK_FORMAT_R32G32_UINT:
	case VK_FORMAT_R32G32_SINT:
	case VK_FORMAT_R32G32_SFLOAT:
	return 2;
	case VK_FORMAT_R32G32B32_UINT:
	case VK_FORMAT_R32G32B32_SINT:
	case VK_FORMAT_R32G32B32_SFLOAT:
	return 3;
	case VK_FORMAT_R8G8B8A8_UNORM:
	case VK_FORMAT_R8G8B8A8_SNORM:
	case VK_FORMAT_R8G8B8A8_UINT:
	case VK_FORMAT_R8G8B8A8_SINT:
	case VK_FORMAT_B8G8R8A8_UNORM:
	case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
	case VK_FORMAT_A8B8G8R8_SNORM_PACK32:
	case VK_FORMAT_A8B8G8R8_UINT_PACK32:
	case VK_FORMAT_A8B8G8R8_SINT_PACK32:
	case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
	case VK_FORMAT_R16G16B16A16_UNORM:
	case VK_FORMAT_R16G16B16A16_SNORM:
	case VK_FORMAT_R16G16B16A16_UINT:
	case VK_FORMAT_R16G16B16A16_SINT:
	case VK_FORMAT_R16G16B16A16_SFLOAT:
	case VK_FORMAT_R32G32B32A32_UINT:
	case VK_FORMAT_R32G32B32A32_SINT:
	case VK_FORMAT_R32G32B32A32_SFLOAT:
	return 4;
	default:
	UNIMPLEMENTED();
	}

	return 0;
	}

	}

	namespace vk
	{

	GraphicsPipeline::GraphicsPipeline(const VkGraphicsPipelineCreateInfo* pCreateInfo, void* mem)
	{
	if((pCreateInfo->flags != 0) \|\|
	(pCreateInfo->stageCount != 2) \|\|
	(pCreateInfo->pTessellationState != nullptr) \|\|
	(pCreateInfo->pDynamicState != nullptr) \|\|
	(pCreateInfo->subpass != 0) \|\|
	(pCreateInfo->basePipelineHandle != VK_NULL_HANDLE) \|\|
	(pCreateInfo->basePipelineIndex != 0))
	{
	UNIMPLEMENTED();
	}

	const VkPipelineShaderStageCreateInfo& vertexStage = pCreateInfo->pStages[0];
	if((vertexStage.stage != VK_SHADER_STAGE_VERTEX_BIT) \|\|
	(vertexStage.flags != 0) \|\|
	!((vertexStage.pSpecializationInfo == nullptr) \|\|
	((vertexStage.pSpecializationInfo->mapEntryCount == 0) &&
	(vertexStage.pSpecializationInfo->dataSize == 0))))
	{
	UNIMPLEMENTED();
	}

	const VkPipelineShaderStageCreateInfo& fragmentStage = pCreateInfo->pStages[1];
	if((fragmentStage.stage != VK_SHADER_STAGE_FRAGMENT_BIT) \|\|
	(fragmentStage.flags != 0) \|\|
	!((fragmentStage.pSpecializationInfo == nullptr) \|\|
	((fragmentStage.pSpecializationInfo->mapEntryCount == 0) &&
	(fragmentStage.pSpecializationInfo->dataSize == 0))))
	{
	UNIMPLEMENTED();
	}

	const VkPipelineVertexInputStateCreateInfo* vertexInputState = pCreateInfo->pVertexInputState;
	if(vertexInputState->flags != 0)
	{
	UNIMPLEMENTED();
	}

	// Temporary in-binding-order representation of buffer strides, to be consumed below
	// when considering attributes. TODO: unfuse buffers from attributes in backend, is old GL model.
	uint32_t bufferStrides[MAX_VERTEX_INPUT_BINDINGS];
	for(uint32_t i = 0; i < vertexInputState->vertexBindingDescriptionCount; i++)
	{
	auto const & desc = vertexInputState->pVertexBindingDescriptions[i];
	bufferStrides[desc.binding] = desc.stride;
	if(desc.inputRate != VK_VERTEX_INPUT_RATE_VERTEX)
	{
	UNIMPLEMENTED();
	}
	}

	for(uint32_t i = 0; i < vertexInputState->vertexAttributeDescriptionCount; i++)
	{
	auto const & desc = vertexInputState->pVertexAttributeDescriptions[i];
	sw::Stream& input = context.input[desc.location];
	input.count = getNumberOfChannels(desc.format);
	input.type = getStreamType(desc.format);
	input.normalized = !sw::Surface::isNonNormalizedInteger(desc.format);
	input.offset = desc.offset;
	input.binding = desc.binding;
	input.stride = bufferStrides[desc.binding];
	}

	const VkPipelineInputAssemblyStateCreateInfo* assemblyState = pCreateInfo->pInputAssemblyState;
	if((assemblyState->flags != 0) \|\|
	(assemblyState->primitiveRestartEnable != 0))
	{
	UNIMPLEMENTED();
	}

	context.drawType = Convert(assemblyState->topology);

	const VkPipelineViewportStateCreateInfo* viewportState = pCreateInfo->pViewportState;
	if(viewportState)
	{
	if((viewportState->flags != 0) \|\|
	(viewportState->viewportCount != 1) \|\|
	(viewportState->scissorCount != 1))
	{
	UNIMPLEMENTED();
	}

	scissor = Convert(viewportState->pScissors[0]);
	viewport = viewportState->pViewports[0];
	}

	const VkPipelineRasterizationStateCreateInfo* rasterizationState = pCreateInfo->pRasterizationState;
	if((rasterizationState->flags != 0) \|\|
	(rasterizationState->depthClampEnable != 0) \|\|
	(rasterizationState->polygonMode != VK_POLYGON_MODE_FILL))
	{
	UNIMPLEMENTED();
	}

	context.rasterizerDiscard = rasterizationState->rasterizerDiscardEnable;
	context.cullMode = rasterizationState->cullMode;
	context.frontFacingCCW = rasterizationState->frontFace == VK_FRONT_FACE_COUNTER_CLOCKWISE;
	context.depthBias = (rasterizationState->depthBiasEnable ? rasterizationState->depthBiasConstantFactor : 0.0f);
	context.slopeDepthBias = (rasterizationState->depthBiasEnable ? rasterizationState->depthBiasSlopeFactor : 0.0f);

	const VkPipelineMultisampleStateCreateInfo* multisampleState = pCreateInfo->pMultisampleState;
	if(multisampleState)
	{
	if((multisampleState->flags != 0) \|\|
	(multisampleState->rasterizationSamples != VK_SAMPLE_COUNT_1_BIT) \|\|
	(multisampleState->sampleShadingEnable != 0) \|\|
	!((multisampleState->pSampleMask == nullptr) \|\|
	(*(multisampleState->pSampleMask) == 0xFFFFFFFFu)) \|\|
	(multisampleState->alphaToCoverageEnable != 0) \|\|
	(multisampleState->alphaToOneEnable != 0))
	{
	UNIMPLEMENTED();
	}
	}

	const VkPipelineDepthStencilStateCreateInfo* depthStencilState = pCreateInfo->pDepthStencilState;
	if(depthStencilState)
	{
	if((depthStencilState->flags != 0) \|\|
	(depthStencilState->depthBoundsTestEnable != 0) \|\|
	(depthStencilState->minDepthBounds != 0.0f) \|\|
	(depthStencilState->maxDepthBounds != 1.0f))
	{
	UNIMPLEMENTED();
	}

	context.depthBufferEnable = depthStencilState->depthTestEnable;
	context.depthWriteEnable = depthStencilState->depthWriteEnable;
	context.depthCompareMode = depthStencilState->depthCompareOp;

	context.stencilEnable = context.twoSidedStencil = depthStencilState->stencilTestEnable;
	if(context.stencilEnable)
	{
	context.stencilMask = depthStencilState->front.compareMask;
	context.stencilCompareMode = depthStencilState->front.compareOp;
	context.stencilZFailOperation = depthStencilState->front.depthFailOp;
	context.stencilFailOperation = depthStencilState->front.failOp;
	context.stencilPassOperation = depthStencilState->front.passOp;
	context.stencilReference = depthStencilState->front.reference;
	context.stencilWriteMask = depthStencilState->front.writeMask;

	context.stencilMaskCCW = depthStencilState->back.compareMask;
	context.stencilCompareModeCCW = depthStencilState->back.compareOp;
	context.stencilZFailOperationCCW = depthStencilState->back.depthFailOp;
	context.stencilFailOperationCCW = depthStencilState->back.failOp;
	context.stencilPassOperationCCW = depthStencilState->back.passOp;
	context.stencilReferenceCCW = depthStencilState->back.reference;
	context.stencilWriteMaskCCW = depthStencilState->back.writeMask;
	}
	}

	const VkPipelineColorBlendStateCreateInfo* colorBlendState = pCreateInfo->pColorBlendState;
	if(colorBlendState)
	{
	if((colorBlendState->flags != 0) \|\|
	((colorBlendState->logicOpEnable != 0) &&
	(colorBlendState->attachmentCount > 1)))
	{
	UNIMPLEMENTED();
	}

	context.colorLogicOpEnabled = colorBlendState->logicOpEnable;
	context.logicalOperation = colorBlendState->logicOp;
	blendConstants.r = colorBlendState->blendConstants[0];
	blendConstants.g = colorBlendState->blendConstants[1];
	blendConstants.b = colorBlendState->blendConstants[2];
	blendConstants.a = colorBlendState->blendConstants[3];

	if(colorBlendState->attachmentCount == 1)
	{
	const VkPipelineColorBlendAttachmentState& attachment = colorBlendState->pAttachments[0];
	if(attachment.colorWriteMask != (VK_COLOR_COMPONENT_R_BIT \| VK_COLOR_COMPONENT_G_BIT \| VK_COLOR_COMPONENT_B_BIT \| VK_COLOR_COMPONENT_A_BIT))
	{
	UNIMPLEMENTED();
	}

	context.alphaBlendEnable = attachment.blendEnable;
	context.separateAlphaBlendEnable = (attachment.alphaBlendOp != attachment.colorBlendOp) \|\|
	(attachment.dstAlphaBlendFactor != attachment.dstColorBlendFactor) \|\|
	(attachment.srcAlphaBlendFactor != attachment.srcColorBlendFactor);
	context.blendOperationStateAlpha = attachment.alphaBlendOp;
	context.blendOperationState = attachment.colorBlendOp;
	context.destBlendFactorStateAlpha = attachment.dstAlphaBlendFactor;
	context.destBlendFactorState = attachment.dstColorBlendFactor;
	context.sourceBlendFactorStateAlpha = attachment.srcAlphaBlendFactor;
	context.sourceBlendFactorState = attachment.srcColorBlendFactor;
	}
	}
	}

	void GraphicsPipeline::destroyPipeline(const VkAllocationCallbacks* pAllocator)
	{
	delete vertexShader;
	delete fragmentShader;
	}

	size_t GraphicsPipeline::ComputeRequiredAllocationSize(const VkGraphicsPipelineCreateInfo* pCreateInfo)
	{
	return 0;
	}

	void GraphicsPipeline::compileShaders(const VkAllocationCallbacks* pAllocator, const VkGraphicsPipelineCreateInfo* pCreateInfo)
	{
	for (auto pStage = pCreateInfo->pStages; pStage != pCreateInfo->pStages + pCreateInfo->stageCount; pStage++)
	{
	auto module = Cast(pStage->module);

	auto code = module->getCode();
	spvtools::Optimizer opt{SPV_ENV_VULKAN_1_1};
	opt.RegisterPass(spvtools::CreateInlineExhaustivePass());

	// If the pipeline uses specialization, apply the specializations before freezing
	if (pStage->pSpecializationInfo)
	{
	std::unordered_map<uint32_t, std::vector<uint32_t>> specializations;
	for (auto i = 0u; i < pStage->pSpecializationInfo->mapEntryCount; ++i)
	{
	auto const &e = pStage->pSpecializationInfo->pMapEntries[i];
	auto value_ptr =
	static_cast<uint32_t const *>(pStage->pSpecializationInfo->pData) + e.offset / sizeof(uint32_t);
	specializations.emplace(e.constantID,
	std::vector<uint32_t>{value_ptr, value_ptr + e.size / sizeof(uint32_t)});
	}
	opt.RegisterPass(spvtools::CreateSetSpecConstantDefaultValuePass(specializations));
	}
	// Freeze specialization constants into normal constants, and propagate through
	opt.RegisterPass(spvtools::CreateFreezeSpecConstantValuePass());
	opt.RegisterPass(spvtools::CreateFoldSpecConstantOpAndCompositePass());

	std::vector<uint32_t> postOptCode;
	opt.Run(code.data(), code.size(), &postOptCode);

	// TODO: also pass in any pipeline state which will affect shader compilation
	auto spirvShader = new sw::SpirvShader{postOptCode};

	switch (pStage->stage)
	{
	case VK_SHADER_STAGE_VERTEX_BIT:
	context.vertexShader = vertexShader = spirvShader;
	break;

	case VK_SHADER_STAGE_FRAGMENT_BIT:
	context.pixelShader = fragmentShader = spirvShader;
	break;

	default:
	UNIMPLEMENTED("Unsupported stage");
	}
	}
	}

	uint32_t GraphicsPipeline::computePrimitiveCount(uint32_t vertexCount) const
	{
	switch(context.drawType)
	{
	case sw::DRAW_POINTLIST:
	return vertexCount;
	case sw::DRAW_LINELIST:
	return vertexCount / 2;
	case sw::DRAW_LINESTRIP:
	return vertexCount - 1;
	case sw::DRAW_TRIANGLELIST:
	return vertexCount / 3;
	case sw::DRAW_TRIANGLESTRIP:
	return vertexCount - 2;
	case sw::DRAW_TRIANGLEFAN:
	return vertexCount - 2;
	default:
	UNIMPLEMENTED();
	}

	return 0;
	}

	const sw::Context& GraphicsPipeline::getContext() const
	{
	return context;
	}

	const sw::Rect& GraphicsPipeline::getScissor() const
	{
	return scissor;
	}

	const VkViewport& GraphicsPipeline::getViewport() const
	{
	return viewport;
	}

	const sw::Color<float>& GraphicsPipeline::getBlendConstants() const
	{
	return blendConstants;
	}

	ComputePipeline::ComputePipeline(const VkComputePipelineCreateInfo* pCreateInfo, void* mem)
	{
	}

	void ComputePipeline::destroyPipeline(const VkAllocationCallbacks* pAllocator)
	{
	}

	size_t ComputePipeline::ComputeRequiredAllocationSize(const VkComputePipelineCreateInfo* pCreateInfo)
	{
	return 0;
	}

	} // namespace vk