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Update leenkx/Shaders/std/tonemap.glsl

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LeenkxTeam 2025-04-07 21:12:11 +00:00
parent c798f122d0
commit 2bc2ab43a1
1 changed files with 49 additions and 0 deletions
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49
leenkx/Shaders/std/tonemap.glsl
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@ -89,3 +89,52 @@ vec3 tonemapAgXFull(vec3 x) {
x = clamp(x, 0.0, 1.0); x = clamp(x, 0.0, 1.0);
return pow(x, vec3(1.0/2.2)); return pow(x, vec3(1.0/2.2));
} }
// Interleaved Gradient Noise (Pseudo-random, AKA Blue Noise style)
// Based on http://momentsingraphics.de/BlueNoise.html
float ditherBlueNoiseStyle(vec2 p) {
return fract(sin(dot(p.xy, vec2(12.9898, 78.233))) * 43758.5453123);
}
// White Noise Dithering
float ditherWhiteNoise(vec2 p) {
return fract(sin(dot(p, vec2(12.9898, 4.1414))) * 43758.5453);
}
// Ordered Dithering (4x4 Bayer Matrix)
float ditherOrderedBayer4x4(ivec2 p) {
const float bayer[16] = float[16](
0.0, 8.0, 2.0, 10.0,
12.0, 4.0, 14.0, 6.0,
3.0, 11.0, 1.0, 9.0,
15.0, 7.0, 13.0, 5.0
);
int index = (p.x % 4) * 4 + (p.y % 4);
return bayer[index] / 16.0;
}
// Ordered Dithering (8x8 Bayer Matrix)
float ditherOrderedBayer8x8(ivec2 p) {
const float bayer8x8[64] = float[64](
0.0, 32.0, 8.0, 40.0, 2.0, 34.0, 10.0, 42.0,
48.0, 16.0, 56.0, 24.0, 50.0, 18.0, 58.0, 26.0,
12.0, 44.0, 4.0, 36.0, 14.0, 46.0, 6.0, 38.0,
60.0, 28.0, 52.0, 20.0, 62.0, 30.0, 54.0, 22.0,
3.0, 35.0, 11.0, 43.0, 1.0, 33.0, 9.0, 41.0,
51.0, 19.0, 59.0, 27.0, 49.0, 17.0, 57.0, 25.0,
15.0, 47.0, 7.0, 39.0, 13.0, 45.0, 5.0, 37.0,
63.0, 31.0, 55.0, 23.0, 61.0, 29.0, 53.0, 21.0
);
int index = (p.x % 8) * 8 + (p.y % 8);
return bayer8x8[index] / 64.0;
}
//vec3 applyDither(vec3 color, vec2 screenCoord) {
// float quantizationLevels = 255.0;
// float noise = randomDither(screenCoord);
// float noiseOffset = (noise - 0.5) / quantizationLevels;
// vec3 ditheredColor = color + noiseOffset;
// return clamp(ditheredColor, 0.0, 1.0);
//}