26 lines
955 B
HLSL
26 lines
955 B
HLSL
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "/Engine/Public/Platform.ush"
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#include "/Plugin/TextureGraph/SamplerStates.ush"
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Texture2D DestinationTexture;
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Texture2D SourceTexture;
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Texture2D Mask;
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float Opacity;
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float LerpRGB; /// 0 or 1 depending on whether we want the RGB lerp
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float LerpAlpha; /// 0 or 1 depending on whether we want the RGB lerp
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float4 FSH_NormalBlend(in float2 uv : TEXCOORD0) : SV_Target0
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{
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float4 src = SourceTexture.Sample(SamplerStates_Linear_Clamp, uv);
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float4 dst = DestinationTexture.Sample(SamplerStates_Linear_Clamp, uv);
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float4 mask = Mask.Sample(SamplerStates_Linear_Clamp, uv);
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float strength = (mask.g * Opacity);
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float4 finalColor = dst;
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finalColor.rgb = lerp(dst.rgb, src.rgb, strength * LerpRGB);
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finalColor.a = lerp(dst.a, src.a, strength * LerpAlpha);
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return finalColor;
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}
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