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Comments say what the code does and why, docs/maxwell.md keeps the Maxwell facts, and fetch_refs.sh clones only the checkout the build reads. Code is unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
24 lines
1.1 KiB
Plaintext
24 lines
1.1 KiB
Plaintext
#version 450
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// Colour adjustment on the present (runtime/vk_color.c): the game's picture, crop rectangle at offset, into an RGBA16F
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// image the FSR 1 pass or the blit then scales to the window. Brightness, contrast around mid-grey, saturation against
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// Rec. 709 luma, then a power curve: the order and ranges of the colour profiles of issue #136.
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layout(local_size_x = 8, local_size_y = 8) in;
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layout(binding = 0) uniform sampler2D src;
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layout(binding = 1, rgba16f) uniform writeonly image2D dst;
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layout(push_constant) uniform P {
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ivec2 offset; // the crop rectangle's corner in src
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ivec2 size; // its size, the size of dst
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vec4 adj; // brightness (added), contrast, saturation, gamma (exponent)
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} pc;
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void main() {
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ivec2 p = ivec2(gl_GlobalInvocationID.xy);
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if (any(greaterThanEqual(p, pc.size))) return;
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vec3 c = texelFetch(src, p + pc.offset, 0).rgb;
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c += pc.adj.x;
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c = (c - 0.5) * pc.adj.y + 0.5;
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c = mix(vec3(dot(c, vec3(0.2126, 0.7152, 0.0722))), c, pc.adj.z);
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c = pow(max(c, vec3(0.0)), vec3(pc.adj.w));
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imageStore(dst, p, vec4(clamp(c, 0.0, 1.0), 1.0));
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}
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