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e94eb7f2d1
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- Motion vectors: single unjittered reprojection matrix (80 bytes) instead of two jittered matrices (160 bytes), eliminating numerical instability from jitter amplification through large world coordinates - Sharpen pass: fix Y-flip for correct UV sampling, double-buffer descriptor sets to avoid race with in-flight command buffers - MSAA: auto-disable when FSR2 enabled, grey out AA setting in UI - Accumulation: variance-based neighborhood clamping in YCoCg space, correct history layout transitions - Frame index: wrap at 256 for stable Halton sequence
85 lines
3.5 KiB
GLSL
85 lines
3.5 KiB
GLSL
#version 450
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layout(local_size_x = 8, local_size_y = 8) in;
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layout(set = 0, binding = 0) uniform sampler2D sceneColor;
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layout(set = 0, binding = 1) uniform sampler2D depthBuffer;
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layout(set = 0, binding = 2) uniform sampler2D motionVectors;
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layout(set = 0, binding = 3) uniform sampler2D historyInput;
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layout(set = 0, binding = 4, rgba16f) uniform writeonly image2D historyOutput;
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layout(push_constant) uniform PushConstants {
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vec4 internalSize; // xy = internal resolution, zw = 1/internal
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vec4 displaySize; // xy = display resolution, zw = 1/display
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vec4 jitterOffset; // xy = current jitter (NDC-space), zw = unused
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vec4 params; // x = resetHistory (1=reset), y = sharpness, zw = unused
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} pc;
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vec3 rgbToYCoCg(vec3 rgb) {
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float y = 0.25 * rgb.r + 0.5 * rgb.g + 0.25 * rgb.b;
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float co = 0.5 * rgb.r - 0.5 * rgb.b;
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float cg = -0.25 * rgb.r + 0.5 * rgb.g - 0.25 * rgb.b;
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return vec3(y, co, cg);
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}
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vec3 yCoCgToRgb(vec3 ycocg) {
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float y = ycocg.x;
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float co = ycocg.y;
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float cg = ycocg.z;
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return vec3(y + co - cg, y + cg, y - co - cg);
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}
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void main() {
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ivec2 outPixel = ivec2(gl_GlobalInvocationID.xy);
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ivec2 outSize = ivec2(pc.displaySize.xy);
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if (outPixel.x >= outSize.x || outPixel.y >= outSize.y) return;
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vec2 outUV = (vec2(outPixel) + 0.5) * pc.displaySize.zw;
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vec3 currentColor = texture(sceneColor, outUV).rgb;
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if (pc.params.x > 0.5) {
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imageStore(historyOutput, outPixel, vec4(currentColor, 1.0));
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return;
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}
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vec2 motion = texture(motionVectors, outUV).rg;
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vec2 historyUV = outUV + motion;
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float historyValid = (historyUV.x >= 0.0 && historyUV.x <= 1.0 &&
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historyUV.y >= 0.0 && historyUV.y <= 1.0) ? 1.0 : 0.0;
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vec3 historyColor = texture(historyInput, historyUV).rgb;
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// Neighborhood clamping in YCoCg space
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vec2 texelSize = pc.internalSize.zw;
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vec3 s0 = rgbToYCoCg(currentColor);
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vec3 s1 = rgbToYCoCg(texture(sceneColor, outUV + vec2(-texelSize.x, 0.0)).rgb);
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vec3 s2 = rgbToYCoCg(texture(sceneColor, outUV + vec2( texelSize.x, 0.0)).rgb);
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vec3 s3 = rgbToYCoCg(texture(sceneColor, outUV + vec2(0.0, -texelSize.y)).rgb);
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vec3 s4 = rgbToYCoCg(texture(sceneColor, outUV + vec2(0.0, texelSize.y)).rgb);
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vec3 s5 = rgbToYCoCg(texture(sceneColor, outUV + vec2(-texelSize.x, -texelSize.y)).rgb);
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vec3 s6 = rgbToYCoCg(texture(sceneColor, outUV + vec2( texelSize.x, -texelSize.y)).rgb);
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vec3 s7 = rgbToYCoCg(texture(sceneColor, outUV + vec2(-texelSize.x, texelSize.y)).rgb);
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vec3 s8 = rgbToYCoCg(texture(sceneColor, outUV + vec2( texelSize.x, texelSize.y)).rgb);
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vec3 m1 = s0 + s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8;
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vec3 m2 = s0*s0 + s1*s1 + s2*s2 + s3*s3 + s4*s4 + s5*s5 + s6*s6 + s7*s7 + s8*s8;
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vec3 mean = m1 / 9.0;
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vec3 variance = max(m2 / 9.0 - mean * mean, vec3(0.0));
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vec3 stddev = sqrt(variance);
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float gamma = 1.5;
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vec3 boxMin = mean - gamma * stddev;
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vec3 boxMax = mean + gamma * stddev;
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vec3 historyYCoCg = rgbToYCoCg(historyColor);
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vec3 clampedHistory = clamp(historyYCoCg, boxMin, boxMax);
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historyColor = yCoCgToRgb(clampedHistory);
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float clampDist = length(historyYCoCg - clampedHistory);
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float blendFactor = mix(0.05, 0.30, clamp(clampDist * 2.0, 0.0, 1.0));
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blendFactor = mix(blendFactor, 1.0, 1.0 - historyValid);
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vec3 result = mix(historyColor, currentColor, blendFactor);
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imageStore(historyOutput, outPixel, vec4(result, 1.0));
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}
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