56 lines
1.7 KiB
Text
56 lines
1.7 KiB
Text
#version 450
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// Implementation based on the article "Efficient Gaussian blur with linear sampling"
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// http://rastergrid.com/blog/2010/09/efficient-gaussian-blur-with-linear-sampling/
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/* A version for MasterEffect Reborn, a standalone version, and a custom shader version for SweetFX can be
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found at http://reshade.me/forum/shader-presentation/27-gaussian-blur-bloom-unsharpmask */
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/*-----------------------------------------------------------.
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/ Gaussian Blur settings /
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'-----------------------------------------------------------*/
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layout(push_constant) uniform Push
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{
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vec4 SourceSize;
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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} params;
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layout(std140, set = 0, binding = 0) uniform UBO
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{
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mat4 MVP;
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} global;
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#define HW 1.00
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#pragma stage vertex
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layout(location = 0) in vec4 Position;
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layout(location = 1) in vec2 TexCoord;
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layout(location = 0) out vec2 vTexCoord;
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void main()
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{
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gl_Position = global.MVP * Position;
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vTexCoord = TexCoord;
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}
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#pragma stage fragment
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layout(location = 0) in vec2 vTexCoord;
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layout(location = 0) out vec4 FragColor;
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layout(set = 0, binding = 2) uniform sampler2D Source;
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void main()
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{
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vec2 texcoord = vTexCoord;
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vec2 PIXEL_SIZE = params.SourceSize.zw;
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float sampleOffsets[5] = { 0.0, 1.4347826, 3.3478260, 5.2608695, 7.1739130 };
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float sampleWeights[5] = { 0.16818994, 0.27276957, 0.11690125, 0.024067905, 0.0021112196 };
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vec4 color = texture(Source, texcoord) * sampleWeights[0];
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for(int i = 1; i < 5; ++i) {
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color += texture(Source, texcoord + vec2(sampleOffsets[i]*HW * PIXEL_SIZE.x, 0.0)) * sampleWeights[i];
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color += texture(Source, texcoord - vec2(sampleOffsets[i]*HW * PIXEL_SIZE.x, 0.0)) * sampleWeights[i];
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}
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FragColor = vec4(color);
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} |