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35 lines
1.4 KiB
GLSL
35 lines
1.4 KiB
GLSL
#ifndef SHARED_BLUE_NOISE_GLSL
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#define SHARED_BLUE_NOISE_GLSL
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const uint kBlueNoiseDim = 128;
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#ifdef BLUE_NOISE_BUFFER_SET
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layout(set = BLUE_NOISE_BUFFER_SET, binding = 0) readonly buffer sobolBuffer { uint sobol_256spp_256d[]; };
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layout(set = BLUE_NOISE_BUFFER_SET, binding = 1) readonly buffer rankingTileBuffer { uint rankingTile[]; };
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layout(set = BLUE_NOISE_BUFFER_SET, binding = 2) readonly buffer scramblingTileBuffer { uint scramblingTile[]; };
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float samplerBlueNoiseErrorDistribution_128x128_OptimizedFor_2d2d2d2d(uint pixel_i, uint pixel_j, uint sampleIndex, uint sampleDimension)
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{
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// wrap arguments
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pixel_i = pixel_i & 127u;
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pixel_j = pixel_j & 127u;
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sampleIndex = sampleIndex & 255u;
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sampleDimension = sampleDimension & 255u;
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// xor index based on optimized ranking
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uint rankedSampleIndex = sampleIndex ^ rankingTile[sampleDimension + (pixel_i + pixel_j * 128u) * 8u];
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// fetch value in sequence
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uint value = sobol_256spp_256d[sampleDimension + rankedSampleIndex * 256u];
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// If the dimension is optimized, xor sequence value based on optimized scrambling
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value = value ^ scramblingTile[(sampleDimension%8) + (pixel_i + pixel_j * 128u) * 8u];
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// convert to float and return
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float v = (0.5f + value) / 256.0f;
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return v;
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}
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#endif
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#endif |