44 lines
No EOL
1.1 KiB
Text
44 lines
No EOL
1.1 KiB
Text
#version 450
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layout (local_size_x = 16, local_size_y = 16) in;
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layout (binding = 0, rgba8) uniform readonly image2D inputImage;
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layout (binding = 1, rgba8) uniform image2D resultImage;
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float conv(in float[9] kernel, in float[9] data, in float denom, in float offset)
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{
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float res = 0.0;
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for (int i=0; i<9; ++i)
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{
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res += kernel[i] * data[i];
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}
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return clamp(res/denom + offset, 0.0, 1.0);
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}
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struct ImageData
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{
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float avg[9];
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} imageData;
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void main()
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{
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// Fetch neighbouring texels
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int n = -1;
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for (int i=-1; i<2; ++i)
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{
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for(int j=-1; j<2; ++j)
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{
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n++;
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vec3 rgb = imageLoad(inputImage, ivec2(gl_GlobalInvocationID.x + i, gl_GlobalInvocationID.y + j)).rgb;
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imageData.avg[n] = (rgb.r + rgb.g + rgb.b) / 3.0;
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}
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}
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float[9] kernel;
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kernel[0] = -1.0; kernel[1] = 0.0; kernel[2] = 0.0;
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kernel[3] = 0.0; kernel[4] = -1.0; kernel[5] = 0.0;
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kernel[6] = 0.0; kernel[7] = 0.0; kernel[8] = 2.0;
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vec4 res = vec4(vec3(conv(kernel, imageData.avg, 1.0, 0.50)), 1.0);
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imageStore(resultImage, ivec2(gl_GlobalInvocationID.xy), res);
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} |