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variance clip for temporal upscaling as well

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Xonk
2026-07-14 16:01:36 -04:00
parent 3c3ca17a24
commit ebe513a1c5
2 changed files with 21 additions and 61 deletions
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shaders/dimensions/composite4.fsh
+9 -48
View File
@@ -1,15 +1,12 @@
#include "/lib/settings.glsl"
uniform sampler2D colortex3;
uniform vec2 texelSize;
#include "/lib/TAA_jitter.glsl"
// Compute 3x3 min max for TAA
uniform float viewHeight;
uniform float viewWidth;
#include "/lib/TAA_jitter.glsl"
//////////////////////////////VOID MAIN//////////////////////////////
//////////////////////////////VOID MAIN//////////////////////////////
//////////////////////////////VOID MAIN//////////////////////////////
@@ -19,39 +16,9 @@ uniform float viewWidth;
void main() {
/* RENDERTARGETS:0,6 */
vec2 screenEdges = 2.0/vec2(viewWidth, viewHeight);
vec2 jitter = taaJitter*texelSize*0.5;
ivec2 center = ivec2(clamp(gl_FragCoord.xy*texelSize, screenEdges, 1.0-screenEdges)/texelSize);
// vec3 current = texelFetch2D(colortex3, center, 0).rgb;
// vec3 cMin = current;
// vec3 cMax = current;
// current = texelFetch2D(colortex3, center + ivec2(-1, -1), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// current = texelFetch2D(colortex3, center + ivec2(-1, 0), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// current = texelFetch2D(colortex3, center + ivec2(-1, 1), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// current = texelFetch2D(colortex3, center + ivec2(0, -1), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// current = texelFetch2D(colortex3, center + ivec2(0, 1), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// current = texelFetch2D(colortex3, center + ivec2(1, -1), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// current = texelFetch2D(colortex3, center + ivec2(1, 0), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// current = texelFetch2D(colortex3, center + ivec2(1, 1), 0).rgb;
// cMin = min(cMin, current);
// cMax = max(cMax, current);
// gl_FragData[0].rgb = cMax;
// gl_FragData[1].rgb = cMin;
// variance clip: https://developer.download.nvidia.com/gameworks/events/GDC2016/msalvi_temporal_supersampling.pdf
vec3 col0 = texelFetch(colortex3, center, 0).rgb;
vec3 col1 = texelFetch(colortex3, center + ivec2(1, 1), 0).rgb;
vec3 col2 = texelFetch(colortex3, center + ivec2(1, -1), 0).rgb;
@@ -62,15 +29,9 @@ void main() {
vec3 col7 = texelFetch(colortex3, center + ivec2(-1, 0), 0).rgb;
vec3 col8 = texelFetch(colortex3, center + ivec2(1, 0), 0).rgb;
vec3 colMax = max(col0,max(col1,max(col2,max(col3, max(col4, max(col5, max(col6, max(col7, col8))))))));
vec3 colMin = min(col0,min(col1,min(col2,min(col3, min(col4, min(col5, min(col6, min(col7, col8))))))));
vec3 momentsA = (col0+col1+col2+col3+col4+col5+col6+col7+col8)/9.0;
vec3 momentsB = (col0*col0+col1*col1+col2*col2+col3*col3+col4*col4+col5*col5+col6*col6+col7*col7+col8*col8)/9.0;
vec3 colMax5 = max(col0,max(col5,max(col6,max(col7,col8))));
vec3 colMin5 = min(col0,min(col5,min(col6,min(col7,col8))));
colMin = 0.5 * (colMin + colMin5);
colMax = 0.5 * (colMax + colMax5);
gl_FragData[0].rgb = colMax;
gl_FragData[1].rgb = colMin;
}
gl_FragData[0].rgb = momentsA;
gl_FragData[1].rgb = momentsB;
}
shaders/dimensions/composite5.fsh
+12 -13
View File
@@ -315,10 +315,19 @@ vec4 computeTAA(vec2 texcoord, bool hand){
if (previousPosition.x < 0.0 || previousPosition.y < 0.0 || previousPosition.x > 1.0 || previousPosition.y > 1.0) return vec4(currentFrame, 1.0);
#endif
// variance clip: https://developer.download.nvidia.com/gameworks/events/GDC2016/msalvi_temporal_supersampling.pdf
#if TAA_MODE == 3
// Interpolating neighboorhood clampling boundaries between pixels
vec3 colMax = texture(colortex0, adjTC_noJitter).rgb;
vec3 colMin = texture(colortex6, adjTC_noJitter).rgb;
// vec3 colMax = texture(colortex0, adjTC_noJitter).rgb;
// vec3 colMin = texture(colortex6, adjTC_noJitter).rgb;
float tuner = 1.25;
vec3 momentsA = texture(colortex0, adjTC_noJitter).rgb;
vec3 momentsB = texture(colortex6, adjTC_noJitter).rgb;
vec3 standardDev = sqrt(max(momentsB - momentsA*momentsA,0.0));
vec3 colMin = momentsA - tuner*standardDev;
vec3 colMax = momentsA + tuner*standardDev;
#else
//Assuming the history color is a blend of the 3x3 neighborhood, we clamp the history to the min and max of each channel in the 3x3 neighborhood
vec3 col0 = texture(colortex3, adjTC_noJitter).rgb;
@@ -331,7 +340,6 @@ vec4 computeTAA(vec2 texcoord, bool hand){
vec3 col7 = texture(colortex3, adjTC_noJitter + vec2(-texelSize.x, 0.0)*clampRadius).rgb;
vec3 col8 = texture(colortex3, adjTC_noJitter + vec2( texelSize.x, 0.0)*clampRadius).rgb;
// variance clip: https://developer.download.nvidia.com/gameworks/events/GDC2016/msalvi_temporal_supersampling.pdf
float tuner = 1.25;
vec3 momentsA = (col0+col1+col2+col3+col4+col5+col6+col7+col8)/9.0;
vec3 momentsB = (col0*col0+col1*col1+col2*col2+col3*col3+col4*col4+col5*col5+col6*col6+col7*col7+col8*col8)/9.0;
@@ -339,11 +347,6 @@ vec4 computeTAA(vec2 texcoord, bool hand){
vec3 colMin = momentsA - tuner*standardDev;
vec3 colMax = momentsA + tuner*standardDev;
// colMax = max(col0,max(col1,max(col2,max(col3, max(col4, max(col5, max(col6, max(col7, col8))))))));
// colMin = min(col0,min(col1,min(col2,min(col3, min(col4, min(col5, min(col6, min(col7, col8))))))));
// colMin = 0.5 * (colMin + min(col0,min(col5,min(col6,min(col7,col8)))));
// colMax = 0.5 * (colMax + max(col0,max(col5,max(col6,max(col7,col8)))));
#endif
#if CRITICAL_DAMAGE_TAKEN_EFFECT_START > 0
@@ -355,11 +358,7 @@ vec4 computeTAA(vec2 texcoord, bool hand){
vec3 clampedframeHistory = clamp(frameHistory, colMin, colMax);
// return the first moments instead of history if the difference across frames in the neighborhood is enough for it. helps reduces ghosting without looking too grainy/flickery
#if TAA_MODE == 3
clampedframeHistory = mix(clampedframeHistory, currentFrame, clamp(abs(clampedframeHistory - frameHistory)/clampedframeHistory,0.0,1.0));
#else
clampedframeHistory = mix(clampedframeHistory, momentsA, clamp(abs(clampedframeHistory - frameHistory)/clampedframeHistory,0.0,1.0));
#endif
clampedframeHistory = mix(clampedframeHistory, momentsA, clamp(abs(clampedframeHistory - frameHistory)/clampedframeHistory,0.0,1.0));
float blendingFactor = BLEND_FACTOR;
// reduce history usage if the camera moves to reduce artifacts in motion.