43 lines
1.0 KiB
Plaintext
43 lines
1.0 KiB
Plaintext
// Copyright 2019-Present LexLiu. All Rights Reserved.
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#include "LGUIPostProcessVertexShader.usf"
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#include "/Engine/Public/Platform.ush"
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static float _Offset[3] =
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{
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0.0,
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1.3846153846,
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3.2307692308
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};
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static float _Weight[3] =
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{
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0.2270270270,
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0.3162162162,
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0.0702702703
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};
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Texture2D _MainTex;
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SamplerState _MainTexSampler;
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float2 _BlurStrength;
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#if USE_STRENGTH_TEXTURE
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Texture2D _StrengthTex;
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SamplerState _StrengthTexSampler;
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#endif
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float4 GaussianBlurPS(SimpleVSToPS input) : SV_Target0
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{
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#if USE_STRENGTH_TEXTURE
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float strength = _StrengthTex.Sample(_StrengthTexSampler, input.uv).r;
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#endif
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float4 color = _MainTex.Sample(_MainTexSampler, input.uv) * _Weight[0];
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for (int i = 1; i < 3; i++)
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{
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float2 uvOffset = _Offset[i] * _BlurStrength;
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#if USE_STRENGTH_TEXTURE
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uvOffset *= strength;
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#endif
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color += _MainTex.Sample(_MainTexSampler, input.uv + uvOffset) * _Weight[i];
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color += _MainTex.Sample(_MainTexSampler, input.uv - uvOffset) * _Weight[i];
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}
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return color;
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}
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