43 lines
1.3 KiB
GLSL
43 lines
1.3 KiB
GLSL
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// Copyright 2020 Google LLC
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Texture2D textureColor : register(t1);
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SamplerState samplerColor : register(s1);
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cbuffer UBO : register(b0)
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{
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float blurScale;
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float blurStrength;
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};
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[[vk::constant_id(0)]] const int blurdirection = 0;
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float4 main([[vk::location(0)]] float2 inUV : TEXCOORD0) : SV_TARGET
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{
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float weight[5];
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weight[0] = 0.227027;
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weight[1] = 0.1945946;
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weight[2] = 0.1216216;
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weight[3] = 0.054054;
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weight[4] = 0.016216;
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float2 textureSize;
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textureColor.GetDimensions(textureSize.x, textureSize.y);
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float2 tex_offset = 1.0 / textureSize * blurScale; // gets size of single texel
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float3 result = textureColor.Sample(samplerColor, inUV).rgb * weight[0]; // current fragment's contribution
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for(int i = 1; i < 5; ++i)
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{
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if (blurdirection == 1)
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{
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// H
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result += textureColor.Sample(samplerColor, inUV + float2(tex_offset.x * i, 0.0)).rgb * weight[i] * blurStrength;
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result += textureColor.Sample(samplerColor, inUV - float2(tex_offset.x * i, 0.0)).rgb * weight[i] * blurStrength;
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}
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else
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{
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// V
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result += textureColor.Sample(samplerColor, inUV + float2(0.0, tex_offset.y * i)).rgb * weight[i] * blurStrength;
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result += textureColor.Sample(samplerColor, inUV - float2(0.0, tex_offset.y * i)).rgb * weight[i] * blurStrength;
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}
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}
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return float4(result, 1.0);
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}
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