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* First all cards are allocated to a temporary atlas of fixed size set by r.LumenScene.CardCaptureAtlasFactor * After cards are captured into temporary atlas, they are compressed into final BC compressed atlas. Compression can be disabled with r.LumenScene.SurfaceCache.Compress * Atlas clears were also converted to support clearing compressed surfaces * Atlas capture operations work on uploaded rect list, instead of a GPU generated card list * Renamed r.LumenSurfaceCache.* to r.LumenScene.SurfaceCache.* * Renamed LumenSceneLighting.usf to LumenSurfaceCache.usf * Renamed LumenScenePrefilter.cpp to LumenSurfaceCache.cpp Cuts down VRAM memory usage by 160mb Compression performance on console: ~0.18ms for 1M texels (~0.9ms with UAV aliasing path, which is currently disabled due to missing pieces in RHI) [CL 16160800 by Krzysztof Narkowicz in ue5-main branch]
92 lines
3.4 KiB
C++
92 lines
3.4 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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PixelShaderUtils.cpp: Implementations of utilities for pixel shaders.
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=============================================================================*/
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#include "PixelShaderUtils.h"
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#include "CommonRenderResources.h"
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#include "RenderGraph.h"
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IMPLEMENT_SHADER_TYPE(, FPixelShaderUtils::FRasterizeToRectsVS, TEXT("/Engine/Private/RenderGraphUtilities.usf"), TEXT("RasterizeToRectsVS"), SF_Vertex);
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bool FPixelShaderUtils::FRasterizeToRectsVS::ShouldCompilePermutation(const FGlobalShaderPermutationParameters& Parameters)
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{
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return IsFeatureLevelSupported(Parameters.Platform, ERHIFeatureLevel::SM5);
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}
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BEGIN_SHADER_PARAMETER_STRUCT(FUploadRectBuffer, )
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RDG_BUFFER_ACCESS(RectBuffer, ERHIAccess::CopyDest)
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END_SHADER_PARAMETER_STRUCT()
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// static
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void FPixelShaderUtils::DrawFullscreenTriangle(FRHICommandList& RHICmdList, uint32 InstanceCount)
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{
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RHICmdList.SetStreamSource(0, GScreenRectangleVertexBuffer.VertexBufferRHI, 0);
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RHICmdList.DrawIndexedPrimitive(
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GScreenRectangleIndexBuffer.IndexBufferRHI,
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/*BaseVertexIndex=*/ 0,
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/*MinIndex=*/ 0,
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/*NumVertices=*/ 3,
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/*StartIndex=*/ 6,
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/*NumPrimitives=*/ 1,
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/*NumInstances=*/ InstanceCount);
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}
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// static
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void FPixelShaderUtils::DrawFullscreenQuad(FRHICommandList& RHICmdList, uint32 InstanceCount)
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{
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RHICmdList.SetStreamSource(0, GScreenRectangleVertexBuffer.VertexBufferRHI, 0);
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RHICmdList.DrawIndexedPrimitive(
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GScreenRectangleIndexBuffer.IndexBufferRHI,
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/*BaseVertexIndex=*/ 0,
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/*MinIndex=*/ 0,
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/*NumVertices=*/ 4,
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/*StartIndex=*/ 0,
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/*NumPrimitives=*/ 2,
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/*NumInstances=*/ InstanceCount);
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}
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// static
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void FPixelShaderUtils::InitFullscreenPipelineState(
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FRHICommandList& RHICmdList,
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const FGlobalShaderMap* GlobalShaderMap,
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const TShaderRef<FShader>& PixelShader,
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FGraphicsPipelineStateInitializer& GraphicsPSOInit)
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{
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TShaderMapRef<FScreenVertexShaderVS> VertexShader(GlobalShaderMap);
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RHICmdList.ApplyCachedRenderTargets(GraphicsPSOInit);
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GraphicsPSOInit.BlendState = TStaticBlendState<>::GetRHI();
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GraphicsPSOInit.RasterizerState = TStaticRasterizerState<>::GetRHI();
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GraphicsPSOInit.DepthStencilState = TStaticDepthStencilState<false, CF_Always>::GetRHI();
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GraphicsPSOInit.BoundShaderState.VertexDeclarationRHI = GFilterVertexDeclaration.VertexDeclarationRHI;
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GraphicsPSOInit.BoundShaderState.VertexShaderRHI = VertexShader.GetVertexShader();
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GraphicsPSOInit.BoundShaderState.PixelShaderRHI = PixelShader.GetPixelShader();
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GraphicsPSOInit.PrimitiveType = PT_TriangleList;
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}
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void FPixelShaderUtils::UploadRectBuffer(FRDGBuilder& GraphBuilder,
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const TArray<FUintVector4, SceneRenderingAllocator>& RectArray,
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FRDGBufferRef RectBuffer)
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{
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FUploadRectBuffer* PassParameters = GraphBuilder.AllocParameters<FUploadRectBuffer>();
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PassParameters->RectBuffer = RectBuffer;
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const uint32 RectArraySizeInBytes = RectArray.GetTypeSize() * RectArray.Num();
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const void* RectArrayDataPtr = RectArray.GetData();
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GraphBuilder.AddPass(
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RDG_EVENT_NAME("UploadRectBuffer"),
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PassParameters,
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ERDGPassFlags::Copy,
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[PassParameters, RectArraySizeInBytes, RectArrayDataPtr](FRHICommandListImmediate& RHICmdList)
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{
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void* WritePointer = RHILockBuffer(PassParameters->RectBuffer->GetRHI(), 0, RectArraySizeInBytes, RLM_WriteOnly);
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FPlatformMemory::Memcpy(WritePointer, RectArrayDataPtr, RectArraySizeInBytes);
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RHIUnlockBuffer(PassParameters->RectBuffer->GetRHI());
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});
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} |