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114458bf0f
- Also removed some unreferenced functions that adding 'override' revealed PR #1002 -- Thank you, Omar007! [CL 2498415 by Mike Fricker in Main branch]
102 lines
4.2 KiB
C++
102 lines
4.2 KiB
C++
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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/*==============================================================================
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Texture2DPreview.h: Implementation for previewing 2D Textures and normal maps.
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==============================================================================*/
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#include "UnrealEd.h"
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#include "Texture2DPreview.h"
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#include "SimpleElementShaders.h"
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#include "GlobalShader.h"
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#include "ShaderParameters.h"
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#include "ShaderParameterUtils.h"
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#include "RHIStaticStates.h"
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/*------------------------------------------------------------------------------
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Batched element shaders for previewing 2d textures.
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------------------------------------------------------------------------------*/
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/**
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* Simple pixel shader for previewing 2d textures at a specified mip level
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*/
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class FSimpleElementTexture2DPreviewPS : public FGlobalShader
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{
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DECLARE_SHADER_TYPE(FSimpleElementTexture2DPreviewPS,Global);
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public:
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FSimpleElementTexture2DPreviewPS(const ShaderMetaType::CompiledShaderInitializerType& Initializer) :
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FGlobalShader(Initializer)
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{
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InTexture.Bind(Initializer.ParameterMap,TEXT("InTexture"), SPF_Mandatory);
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InTextureSampler.Bind(Initializer.ParameterMap,TEXT("InTextureSampler"));
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TextureComponentReplicate.Bind(Initializer.ParameterMap,TEXT("TextureComponentReplicate"));
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TextureComponentReplicateAlpha.Bind(Initializer.ParameterMap,TEXT("TextureComponentReplicateAlpha"));
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ColorWeights.Bind(Initializer.ParameterMap,TEXT("ColorWeights"));
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PackedParameters.Bind(Initializer.ParameterMap,TEXT("PackedParams"));
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}
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FSimpleElementTexture2DPreviewPS() {}
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/** Should the shader be cached? Always. */
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static bool ShouldCache(EShaderPlatform Platform)
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{
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return IsFeatureLevelSupported(Platform, ERHIFeatureLevel::SM4);
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}
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void SetParameters(FRHICommandList& RHICmdList, const FTexture* TextureValue, const FMatrix& ColorWeightsValue, float GammaValue, float MipLevel, bool bIsNormalMap)
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{
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SetTextureParameter(RHICmdList, GetPixelShader(),InTexture,InTextureSampler,TextureValue);
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SetShaderValue(RHICmdList, GetPixelShader(),ColorWeights,ColorWeightsValue);
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FVector4 PackedParametersValue(GammaValue, MipLevel, bIsNormalMap ? 1.0 : -1.0f, 0.0f);
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SetShaderValue(RHICmdList, GetPixelShader(), PackedParameters, PackedParametersValue);
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SetShaderValue(RHICmdList, GetPixelShader(),TextureComponentReplicate,TextureValue->bGreyScaleFormat ? FLinearColor(1,0,0,0) : FLinearColor(0,0,0,0));
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SetShaderValue(RHICmdList, GetPixelShader(),TextureComponentReplicateAlpha,TextureValue->bGreyScaleFormat ? FLinearColor(1,0,0,0) : FLinearColor(0,0,0,1));
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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 << InTexture;
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Ar << InTextureSampler;
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Ar << TextureComponentReplicate;
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Ar << TextureComponentReplicateAlpha;
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Ar << ColorWeights;
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Ar << PackedParameters;
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return bShaderHasOutdatedParameters;
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}
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private:
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FShaderResourceParameter InTexture;
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FShaderResourceParameter InTextureSampler;
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FShaderParameter TextureComponentReplicate;
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FShaderParameter TextureComponentReplicateAlpha;
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FShaderParameter ColorWeights;
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FShaderParameter PackedParameters;
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};
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IMPLEMENT_SHADER_TYPE(,FSimpleElementTexture2DPreviewPS,TEXT("SimpleElementTexture2DPreviewPixelShader"),TEXT("Main"),SF_Pixel);
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/** Binds vertex and pixel shaders for this element */
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void FBatchedElementTexture2DPreviewParameters::BindShaders(
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FRHICommandList& RHICmdList,
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ERHIFeatureLevel::Type InFeatureLevel,
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const FMatrix& InTransform,
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const float InGamma,
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const FMatrix& ColorWeights,
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const FTexture* Texture)
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{
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TShaderMapRef<FSimpleElementVS> VertexShader(GetGlobalShaderMap(InFeatureLevel));
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TShaderMapRef<FSimpleElementTexture2DPreviewPS> PixelShader(GetGlobalShaderMap(InFeatureLevel));
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static FGlobalBoundShaderState BoundShaderState;
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SetGlobalBoundShaderState(RHICmdList, InFeatureLevel, BoundShaderState, GSimpleElementVertexDeclaration.VertexDeclarationRHI, *VertexShader, *PixelShader);
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VertexShader->SetParameters(RHICmdList, InTransform);
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PixelShader->SetParameters(RHICmdList, Texture, ColorWeights, InGamma, MipLevel, bIsNormalMap);
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if( bIsSingleChannelFormat )
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{
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RHICmdList.SetBlendState(TStaticBlendState<>::GetRHI());
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}
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}
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