51 lines
1.4 KiB
HLSL
51 lines
1.4 KiB
HLSL
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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SimpleElementColorChannelMaskPixelShader.hlsl: Pixel shader for manipulating weights of color channels
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=============================================================================*/
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#include "Common.ush"
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Texture2D InTexture;
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SamplerState InTextureSampler;
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float4x4 ColorWeights;
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float Gamma;
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uint bAlphaOnly;
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#define WRITE_TO_GBUFFER (FEATURE_LEVEL >= FEATURE_LEVEL_SM4 && !FORWARD_SHADING)
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void Main(
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in float2 TextureCoordinate : TEXCOORD0,
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in float4 Color : TEXCOORD1,
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out float4 OutColor : SV_Target0
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#if WRITE_TO_GBUFFER
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,out float4 OutWorldNormal : SV_Target1
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#endif
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)
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{
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float4 BaseColor = Texture2DSample(InTexture, InTextureSampler,TextureCoordinate);
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float4 FinalColor;
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// Seperate the Color weights and use against the Base colour to detrmine the actual colour from our filter
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FinalColor.r = dot(BaseColor, ColorWeights[0]);
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FinalColor.g = dot(BaseColor, ColorWeights[1]);
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FinalColor.b = dot(BaseColor, ColorWeights[2]);
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FinalColor.a = dot(BaseColor, ColorWeights[3]);
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if( Gamma != 1.0 )
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{
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// Gamma correct the output color.
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FinalColor.rgb = pow(saturate(FinalColor.rgb),Gamma);
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}
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FinalColor*=Color;
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OutColor = RETURN_COLOR(FinalColor);
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#if WRITE_TO_GBUFFER
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// Set the G buffer bits that indicate that deferred lighting and image reflections are not enabled
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OutWorldNormal = 0;
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#endif
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} |