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https://github.com/izzy2lost/UnrealEngineUWP.git
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Max Chen
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "RHI.h"
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#include "RenderResource.h"
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#include "Shader.h"
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#include "GlobalShader.h"
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#include "Modules/ModuleManager.h"
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#if defined(HAS_MORPHEUS) && HAS_MORPHEUS
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/**
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* Pixel shader to convert RGBA to YUV420.
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*
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* YUV420 has 8 bit intensity values in the top 2/3 of the texture for every pixel and 8 bit each UV coordinates
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* into the YUV colorspace in the bottom 1/3 for every pixel quad.
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*
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* This is only used by PS4.
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*/
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class FRGBAToYUV420CS
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: public FGlobalShader
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{
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DECLARE_SHADER_TYPE(FRGBAToYUV420CS, Global);
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public:
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static bool ShouldCompilePermutation(const FGlobalShaderPermutationParameters& Parameters)
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{
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if (Parameters.Platform == EShaderPlatform::SP_PS4)
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{
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// we must use a run time check for this because the builds the build machines create will have Morpheus defined,
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// but a user will not necessarily have the Morpheus files
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return FModuleManager::Get().ModuleExists(TEXT("Morpheus"));
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}
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return false;
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}
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FRGBAToYUV420CS() { }
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FRGBAToYUV420CS(const ShaderMetaType::CompiledShaderInitializerType& Initializer)
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: FGlobalShader(Initializer)
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{
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TargetHeight.Bind(Initializer.ParameterMap, TEXT("TargetHeight"), SPF_Mandatory);
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ScaleFactorX.Bind(Initializer.ParameterMap, TEXT("ScaleFactorX"), SPF_Mandatory);
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ScaleFactorY.Bind(Initializer.ParameterMap, TEXT("ScaleFactorY"), SPF_Mandatory);
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TextureYOffset.Bind(Initializer.ParameterMap, TEXT("TextureYOffset"), SPF_Mandatory);
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SrcTexture.Bind(Initializer.ParameterMap, TEXT("SrcTexture"), SPF_Mandatory);
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OutTextureRW.Bind(Initializer.ParameterMap, TEXT("OutTexture"), SPF_Mandatory);
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}
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virtual bool Serialize(FArchive& Ar) override
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{
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bool bShaderHasOutdatedParameters = FGlobalShader::Serialize(Ar);
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Ar << TargetHeight << ScaleFactorX << ScaleFactorY << TextureYOffset << SrcTexture << OutTextureRW;
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return bShaderHasOutdatedParameters;
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}
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void SetParameters(FRHICommandList& RHICmdList, TRefCountPtr<FRHITexture2D> SrcTex, FRHIUnorderedAccessView* OutUAV, float TargetHeight, float ScaleFactorX, float ScaleFactorY, float TextureYOffset);
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void UnbindBuffers(FRHICommandList& RHICmdList);
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protected:
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FShaderParameter TargetHeight;
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FShaderParameter ScaleFactorX;
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FShaderParameter ScaleFactorY;
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FShaderParameter TextureYOffset;
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FShaderResourceParameter SrcTexture;
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FShaderResourceParameter OutTextureRW;
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};
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#endif //defined(HAS_MORPHEUS) && HAS_MORPHEUS
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