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examples: Fix FXAA not working in OpenGL

This commit is contained in:
Michael Fabian 'Xaymar' Dirks 2021-11-27 02:36:51 +01:00
parent 4b86d67517
commit 06e2dea1fa
1 changed files with 270 additions and 246 deletions
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516
data/examples/shaders/filter/fxaa.effect
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@ -96,7 +96,7 @@ uniform float _300_EdgeThresholdMin<
> = 8.33; > = 8.33;
// ======================================== // // ======================================== //
// Functionality // FXAA Functionality
// ======================================== // // ======================================== //
// This is a bit of a mess, but it is necessary to get things to work. We're // This is a bit of a mess, but it is necessary to get things to work. We're
// dealing with multiple unusual restrictions here, all of which are from // dealing with multiple unusual restrictions here, all of which are from
@ -121,42 +121,66 @@ uniform float _300_EdgeThresholdMin<
#define FxaaTex texture2d #define FxaaTex texture2d
#ifdef GS_DEVICE_OPENGL #ifdef GS_DEVICE_OPENGL
#define FxaaSat(x) clamp(x, 0., 1.) #define FxaaSat(x) clamp(x, 0., 1.)
#define FxaaTexTop(t, p) textureLod(t, p, 0.0) #define FxaaTexTop(t, p) textureLod(t, p, 0.0)
#define FxaaTexOff(t, p, o, r) textureLodOffset(t, p, 0.0, o) #define FxaaTexOff(t, p, o, r) textureLodOffset(t, p, 0.0, o)
#else #else
#define FxaaSat(x) saturate(x) #define FxaaSat(x) saturate(x)
#define FxaaTexTop(t, p) t.SampleLevel(PointClampSampler, p, 0.0) #define FxaaTexTop(t, p) t.SampleLevel(PointClampSampler, p, 0.0)
#define FxaaTexOff(t, p, o, r) t.SampleLevel(PointClampSampler, p, 0.0, o) #define FxaaTexOff(t, p, o, r) t.SampleLevel(PointClampSampler, p, 0.0, o)
#endif #endif
// Actual Functionality starts here. // Actual Functionality starts here.
FxaaUInt quality_stages() { FxaaUInt quality_stages() {
FxaaUInt stages = FxaaUInt(_000_QualityPreset) % 10; FxaaUInt stages = FxaaUInt(_000_QualityPreset) % 10u;
return (3 + stages); return 3u + stages;
} }
FxaaFloat quality_value(in FxaaUInt stage) { FxaaFloat quality_value(in FxaaUInt stage) {
const FxaaFloat preset_00[12] = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; #ifdef GS_DEVICE_OPENGL
const FxaaFloat preset_00[12u] = FxaaFloat[12u]( 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
// 1.x // 1.x
const FxaaFloat preset_10[12] = { 1.5, 3.0, 12.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_10[12u] = FxaaFloat[12u]( 1.5f, 3.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_11[12] = { 1.0, 1.5, 3.0, 12.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_11[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 3.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_12[12] = { 1.0, 1.5, 2.0, 4.0, 12.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_12[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_13[12] = { 1.0, 1.5, 2.0, 2.0, 4.0, 12.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_13[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_14[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 4.0, 12.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_14[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_15[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 2.0, 4.0, 12.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_15[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f);
// 2.x // 2.x
const FxaaFloat preset_20[12] = { 1.5, 2.0, 8.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_20[12u] = FxaaFloat[12u]( 1.5f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_21[12] = { 1.0, 1.5, 2.0, 8.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_21[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_22[12] = { 1.0, 1.5, 2.0, 2.0, 8.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_22[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_23[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 8.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_23[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_24[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 3.0, 8.0, 0.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_24[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 3.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_25[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 2.0, 4.0, 8.0, 0.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_25[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_26[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 8.0, 0.0, 0.0, 0.0}; const FxaaFloat preset_26[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f, 0.0f, 0.0f);
const FxaaFloat preset_27[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 8.0, 0.0, 0.0}; const FxaaFloat preset_27[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f, 0.0f);
const FxaaFloat preset_28[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 8.0, 0.0}; const FxaaFloat preset_28[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f);
const FxaaFloat preset_29[12] = { 1.0, 1.5, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 8.0}; const FxaaFloat preset_29[12u] = FxaaFloat[12u]( 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f);
// 3.x // 3.x
const FxaaFloat preset_39[12] = { 1.0, 1.0, 1.0, 1.0, 1.0, 1.5, 2.0, 2.0, 2.0, 2.0, 4.0, 8.0}; const FxaaFloat preset_39[12u] = FxaaFloat[12u]( 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f);
#else
const FxaaFloat preset_00[12u] = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
// 1.x
const FxaaFloat preset_10[12u] = { 1.5f, 3.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_11[12u] = { 1.0f, 1.5f, 3.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_12[12u] = { 1.0f, 1.5f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_13[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_14[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_15[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 12.0f, 0.0f, 0.0f, 0.0f, 0.0f};
// 2.x
const FxaaFloat preset_20[12u] = { 1.5f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_21[12u] = { 1.0f, 1.5f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_22[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_23[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_24[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 3.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_25[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_26[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f, 0.0f, 0.0f};
const FxaaFloat preset_27[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f, 0.0f};
const FxaaFloat preset_28[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f, 0.0f};
const FxaaFloat preset_29[12u] = { 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f};
// 3.x
const FxaaFloat preset_39[12u] = { 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.5f, 2.0f, 2.0f, 2.0f, 2.0f, 4.0f, 8.0f};
#endif
switch (_000_QualityPreset) { switch (_000_QualityPreset) {
case 10: return preset_10[stage]; case 10: return preset_10[stage];
@ -209,239 +233,239 @@ FxaaBool FxaaStep(in FxaaTex tex,
} }
FxaaFloat4 FxaaPixelShader( FxaaFloat4 FxaaPixelShader(
// //
// Use noperspective interpolation here (turn off perspective interpolation). // Use noperspective interpolation here (turn off perspective interpolation).
// {xy} = center of pixel // {xy} = center of pixel
FxaaFloat2 pos, FxaaFloat2 pos,
// //
// Input color texture. // Input color texture.
// {rgb_} = color in linear or perceptual color space // {rgb_} = color in linear or perceptual color space
// if (FXAA_GREEN_AS_LUMA == 0) // if (FXAA_GREEN_AS_LUMA == 0)
// {___a} = luma in perceptual color space (not linear) // {___a} = luma in perceptual color space (not linear)
FxaaTex tex, FxaaTex tex,
// //
// Only used on FXAA Quality. // Only used on FXAA Quality.
// This must be from a constant/uniform. // This must be from a constant/uniform.
// {x_} = 1.0/screenWidthInPixels // {x_} = 1.0/screenWidthInPixels
// {_y} = 1.0/screenHeightInPixels // {_y} = 1.0/screenHeightInPixels
FxaaFloat2 fxaaQualityRcpFrame, FxaaFloat2 fxaaQualityRcpFrame,
// //
// Only used on FXAA Quality. // Only used on FXAA Quality.
// This used to be the FXAA_QUALITY__SUBPIX define. // This used to be the FXAA_QUALITY__SUBPIX define.
// It is here now to allow easier tuning. // It is here now to allow easier tuning.
// Choose the amount of sub-pixel aliasing removal. // Choose the amount of sub-pixel aliasing removal.
// This can effect sharpness. // This can effect sharpness.
// 1.00 - upper limit (softer) // 1.00 - upper limit (softer)
// 0.75 - default amount of filtering // 0.75 - default amount of filtering
// 0.50 - lower limit (sharper, less sub-pixel aliasing removal) // 0.50 - lower limit (sharper, less sub-pixel aliasing removal)
// 0.25 - almost off // 0.25 - almost off
// 0.00 - completely off // 0.00 - completely off
FxaaFloat fxaaQualitySubpix, FxaaFloat fxaaQualitySubpix,
// //
// Only used on FXAA Quality. // Only used on FXAA Quality.
// This used to be the FXAA_QUALITY__EDGE_THRESHOLD define. // This used to be the FXAA_QUALITY__EDGE_THRESHOLD define.
// It is here now to allow easier tuning. // It is here now to allow easier tuning.
// The minimum amount of local contrast required to apply algorithm. // The minimum amount of local contrast required to apply algorithm.
// 0.333 - too little (faster) // 0.333 - too little (faster)
// 0.250 - low quality // 0.250 - low quality
// 0.166 - default // 0.166 - default
// 0.125 - high quality // 0.125 - high quality
// 0.063 - overkill (slower) // 0.063 - overkill (slower)
FxaaFloat fxaaQualityEdgeThreshold, FxaaFloat fxaaQualityEdgeThreshold,
// //
// Only used on FXAA Quality. // Only used on FXAA Quality.
// This used to be the FXAA_QUALITY__EDGE_THRESHOLD_MIN define. // This used to be the FXAA_QUALITY__EDGE_THRESHOLD_MIN define.
// It is here now to allow easier tuning. // It is here now to allow easier tuning.
// Trims the algorithm from processing darks. // Trims the algorithm from processing darks.
// 0.0833 - upper limit (default, the start of visible unfiltered edges) // 0.0833 - upper limit (default, the start of visible unfiltered edges)
// 0.0625 - high quality (faster) // 0.0625 - high quality (faster)
// 0.0312 - visible limit (slower) // 0.0312 - visible limit (slower)
// Special notes when using FXAA_GREEN_AS_LUMA, // Special notes when using FXAA_GREEN_AS_LUMA,
// Likely want to set this to zero. // Likely want to set this to zero.
// As colors that are mostly not-green // As colors that are mostly not-green
// will appear very dark in the green channel! // will appear very dark in the green channel!
// Tune by looking at mostly non-green content, // Tune by looking at mostly non-green content,
// then start at zero and increase until aliasing is a problem. // then start at zero and increase until aliasing is a problem.
FxaaFloat fxaaQualityEdgeThresholdMin FxaaFloat fxaaQualityEdgeThresholdMin
) { ) {
// ======================================== // Similar to 3.11 // ======================================== // Similar to 3.11
FxaaFloat2 posM; FxaaFloat2 posM;
posM.x = pos.x; posM.x = pos.x;
posM.y = pos.y; posM.y = pos.y;
#ifdef FXAA_GATHER4_ALPHA #ifdef FXAA_GATHER4_ALPHA
#ifdef FXAA_DISCARD #ifdef FXAA_DISCARD
FxaaFloat4 rgbyM = FxaaTexTop(tex, posM); FxaaFloat4 rgbyM = FxaaTexTop(tex, posM);
#ifndef FXAA_GREEN_AS_LUMA #ifndef FXAA_GREEN_AS_LUMA
#define lumaM rgbyM.w #define lumaM rgbyM.w
#else #else
#define lumaM rgbyM.y #define lumaM rgbyM.y
#endif #endif
#endif #endif
#ifndef FXAA_GREEN_AS_LUMA #ifndef FXAA_GREEN_AS_LUMA
FxaaFloat4 luma4A = FxaaTexAlpha4(tex, posM); FxaaFloat4 luma4A = FxaaTexAlpha4(tex, posM);
FxaaFloat4 luma4B = FxaaTexOffAlpha4(tex, posM, FxaaInt2(-1, -1)); FxaaFloat4 luma4B = FxaaTexOffAlpha4(tex, posM, FxaaInt2(-1, -1));
#else #else
FxaaFloat4 luma4A = FxaaTexGreen4(tex, posM); FxaaFloat4 luma4A = FxaaTexGreen4(tex, posM);
FxaaFloat4 luma4B = FxaaTexOffGreen4(tex, posM, FxaaInt2(-1, -1)); FxaaFloat4 luma4B = FxaaTexOffGreen4(tex, posM, FxaaInt2(-1, -1));
#endif #endif
#ifdef FXAA_DISCARD #ifdef FXAA_DISCARD
#define lumaM luma4A.w #define lumaM luma4A.w
#endif #endif
#define lumaE luma4A.z #define lumaE luma4A.z
#define lumaS luma4A.x #define lumaS luma4A.x
#define lumaSE luma4A.y #define lumaSE luma4A.y
#define lumaNW luma4B.w #define lumaNW luma4B.w
#define lumaN luma4B.z #define lumaN luma4B.z
#define lumaW luma4B.x #define lumaW luma4B.x
#else #else
FxaaFloat4 rgbyM = FxaaTexTop(tex, posM); FxaaFloat4 rgbyM = FxaaTexTop(tex, posM);
#ifndef FXAA_GREEN_AS_LUMA #ifndef FXAA_GREEN_AS_LUMA
#define lumaM rgbyM.w #define lumaM rgbyM.w
#else #else
#define lumaM rgbyM.y #define lumaM rgbyM.y
#endif #endif
FxaaFloat lumaS = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 0, 1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaS = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 0, 1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1, 0), fxaaQualityRcpFrame.xy)); FxaaFloat lumaE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1, 0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaN = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 0,-1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaN = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 0,-1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 0), fxaaQualityRcpFrame.xy)); FxaaFloat lumaW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 0), fxaaQualityRcpFrame.xy));
#endif #endif
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat maxSM = max(lumaS, lumaM); FxaaFloat maxSM = max(lumaS, lumaM);
FxaaFloat minSM = min(lumaS, lumaM); FxaaFloat minSM = min(lumaS, lumaM);
FxaaFloat maxESM = max(lumaE, maxSM); FxaaFloat maxESM = max(lumaE, maxSM);
FxaaFloat minESM = min(lumaE, minSM); FxaaFloat minESM = min(lumaE, minSM);
FxaaFloat maxWN = max(lumaN, lumaW); FxaaFloat maxWN = max(lumaN, lumaW);
FxaaFloat minWN = min(lumaN, lumaW); FxaaFloat minWN = min(lumaN, lumaW);
FxaaFloat rangeMax = max(maxWN, maxESM); FxaaFloat rangeMax = max(maxWN, maxESM);
FxaaFloat rangeMin = min(minWN, minESM); FxaaFloat rangeMin = min(minWN, minESM);
FxaaFloat rangeMaxScaled = rangeMax * fxaaQualityEdgeThreshold; FxaaFloat rangeMaxScaled = rangeMax * fxaaQualityEdgeThreshold;
FxaaFloat range = rangeMax - rangeMin; FxaaFloat range = rangeMax - rangeMin;
FxaaFloat rangeMaxClamped = max(fxaaQualityEdgeThresholdMin, rangeMaxScaled); FxaaFloat rangeMaxClamped = max(fxaaQualityEdgeThresholdMin, rangeMaxScaled);
FxaaBool earlyExit = range < rangeMaxClamped; FxaaBool earlyExit = range < rangeMaxClamped;
// ======================================== // Similar to 3.11 // ======================================== // Similar to 3.11
if(earlyExit) { if(earlyExit) {
#ifdef FXAA_DISCARD #ifdef FXAA_DISCARD
FxaaDiscard; FxaaDiscard;
#else #else
return rgbyM; return rgbyM;
#endif #endif
} }
// ======================================== // Similar to 3.11 // ======================================== // Similar to 3.11
#ifndef FXAA_GATHER4_ALPHA #ifndef FXAA_GATHER4_ALPHA
FxaaFloat lumaNW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1,-1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaNW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1,-1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1, 1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaSE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1, 1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaNE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1,-1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaNE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1,-1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 1), fxaaQualityRcpFrame.xy));
#else #else
FxaaFloat lumaNE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(1, -1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaNE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(1, -1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 1), fxaaQualityRcpFrame.xy)); FxaaFloat lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 1), fxaaQualityRcpFrame.xy));
#endif #endif
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat lumaNS = lumaN + lumaS; FxaaFloat lumaNS = lumaN + lumaS;
FxaaFloat lumaWE = lumaW + lumaE; FxaaFloat lumaWE = lumaW + lumaE;
FxaaFloat subpixRcpRange = 1.0/range; FxaaFloat subpixRcpRange = 1.0/range;
FxaaFloat subpixNSWE = lumaNS + lumaWE; FxaaFloat subpixNSWE = lumaNS + lumaWE;
FxaaFloat edgeHorz1 = (-2.0 * lumaM) + lumaNS; FxaaFloat edgeHorz1 = (-2.0 * lumaM) + lumaNS;
FxaaFloat edgeVert1 = (-2.0 * lumaM) + lumaWE; FxaaFloat edgeVert1 = (-2.0 * lumaM) + lumaWE;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat lumaNESE = lumaNE + lumaSE; FxaaFloat lumaNESE = lumaNE + lumaSE;
FxaaFloat lumaNWNE = lumaNW + lumaNE; FxaaFloat lumaNWNE = lumaNW + lumaNE;
FxaaFloat edgeHorz2 = (-2.0 * lumaE) + lumaNESE; FxaaFloat edgeHorz2 = (-2.0 * lumaE) + lumaNESE;
FxaaFloat edgeVert2 = (-2.0 * lumaN) + lumaNWNE; FxaaFloat edgeVert2 = (-2.0 * lumaN) + lumaNWNE;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat lumaNWSW = lumaNW + lumaSW; FxaaFloat lumaNWSW = lumaNW + lumaSW;
FxaaFloat lumaSWSE = lumaSW + lumaSE; FxaaFloat lumaSWSE = lumaSW + lumaSE;
FxaaFloat edgeHorz4 = (abs(edgeHorz1) * 2.0) + abs(edgeHorz2); FxaaFloat edgeHorz4 = (abs(edgeHorz1) * 2.0) + abs(edgeHorz2);
FxaaFloat edgeVert4 = (abs(edgeVert1) * 2.0) + abs(edgeVert2); FxaaFloat edgeVert4 = (abs(edgeVert1) * 2.0) + abs(edgeVert2);
FxaaFloat edgeHorz3 = (-2.0 * lumaW) + lumaNWSW; FxaaFloat edgeHorz3 = (-2.0 * lumaW) + lumaNWSW;
FxaaFloat edgeVert3 = (-2.0 * lumaS) + lumaSWSE; FxaaFloat edgeVert3 = (-2.0 * lumaS) + lumaSWSE;
FxaaFloat edgeHorz = abs(edgeHorz3) + edgeHorz4; FxaaFloat edgeHorz = abs(edgeHorz3) + edgeHorz4;
FxaaFloat edgeVert = abs(edgeVert3) + edgeVert4; FxaaFloat edgeVert = abs(edgeVert3) + edgeVert4;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat subpixNWSWNESE = lumaNWSW + lumaNESE; FxaaFloat subpixNWSWNESE = lumaNWSW + lumaNESE;
FxaaFloat lengthSign = fxaaQualityRcpFrame.x; FxaaFloat lengthSign = fxaaQualityRcpFrame.x;
FxaaBool horzSpan = edgeHorz >= edgeVert; FxaaBool horzSpan = edgeHorz >= edgeVert;
FxaaFloat subpixA = subpixNSWE * 2.0 + subpixNWSWNESE; FxaaFloat subpixA = subpixNSWE * 2.0 + subpixNWSWNESE;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
if(!horzSpan) lumaN = lumaW; if(!horzSpan) lumaN = lumaW;
if(!horzSpan) lumaS = lumaE; if(!horzSpan) lumaS = lumaE;
if(horzSpan) lengthSign = fxaaQualityRcpFrame.y; if(horzSpan) lengthSign = fxaaQualityRcpFrame.y;
FxaaFloat subpixB = (subpixA * (1.0/12.0)) - lumaM; FxaaFloat subpixB = (subpixA * (1.0/12.0)) - lumaM;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat gradientN = lumaN - lumaM; FxaaFloat gradientN = lumaN - lumaM;
FxaaFloat gradientS = lumaS - lumaM; FxaaFloat gradientS = lumaS - lumaM;
FxaaFloat lumaNN = lumaN + lumaM; FxaaFloat lumaNN = lumaN + lumaM;
FxaaFloat lumaSS = lumaS + lumaM; FxaaFloat lumaSS = lumaS + lumaM;
FxaaBool pairN = abs(gradientN) >= abs(gradientS); FxaaBool pairN = abs(gradientN) >= abs(gradientS);
FxaaFloat gradient = max(abs(gradientN), abs(gradientS)); FxaaFloat gradient = max(abs(gradientN), abs(gradientS));
if(pairN) lengthSign = -lengthSign; if(pairN) lengthSign = -lengthSign;
FxaaFloat subpixC = FxaaSat(abs(subpixB) * subpixRcpRange); FxaaFloat subpixC = FxaaSat(abs(subpixB) * subpixRcpRange);
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat2 posB; FxaaFloat2 posB;
posB.x = posM.x; posB.x = posM.x;
posB.y = posM.y; posB.y = posM.y;
FxaaFloat2 offNP; FxaaFloat2 offNP;
offNP.x = (!horzSpan) ? 0.0 : fxaaQualityRcpFrame.x; offNP.x = (!horzSpan) ? 0.0 : fxaaQualityRcpFrame.x;
offNP.y = ( horzSpan) ? 0.0 : fxaaQualityRcpFrame.y; offNP.y = ( horzSpan) ? 0.0 : fxaaQualityRcpFrame.y;
if(!horzSpan) posB.x += lengthSign * 0.5; if(!horzSpan) posB.x += lengthSign * 0.5;
if( horzSpan) posB.y += lengthSign * 0.5; if( horzSpan) posB.y += lengthSign * 0.5;
// ======================================== // Custom (but still copied from 3.11) // ======================================== // Custom (but still copied from 3.11)
FxaaFloat subpixD = ((-2.0)*subpixC) + 3.0; FxaaFloat subpixD = ((-2.0)*subpixC) + 3.0;
FxaaFloat subpixE = subpixC * subpixC; FxaaFloat subpixE = subpixC * subpixC;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
if(!pairN) lumaNN = lumaSS; if(!pairN) lumaNN = lumaSS;
FxaaFloat gradientScaled = gradient * 1.0/4.0; FxaaFloat gradientScaled = gradient * 1.0/4.0;
FxaaFloat lumaMM = lumaM - lumaNN * 0.5; FxaaFloat lumaMM = lumaM - lumaNN * 0.5;
FxaaFloat subpixF = subpixD * subpixE; FxaaFloat subpixF = subpixD * subpixE;
FxaaBool lumaMLTZero = lumaMM < 0.0; FxaaBool lumaMLTZero = lumaMM < 0.0;
// ======================================== // Custom // ======================================== // Custom
uint stages = quality_stages(); uint stages = quality_stages();
FxaaBool doneN = false; FxaaBool doneN = false;
FxaaFloat2 posN = posB; FxaaFloat2 posN = posB;
FxaaFloat lumaEndN = 0; FxaaFloat lumaEndN = 0;
FxaaBool doneP = false; FxaaBool doneP = false;
FxaaFloat2 posP = posB; FxaaFloat2 posP = posB;
FxaaFloat lumaEndP = 0; FxaaFloat lumaEndP = 0;
FxaaBool doneNP = false; FxaaBool doneNP = false;
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(0)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(0u));
if ((stages >= 1) && doneNP) { if ((stages >= 1u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(1)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(1u));
if ((stages >= 2) && doneNP) { if ((stages >= 2u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(2)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(2u));
if ((stages >= 3) && doneNP) { if ((stages >= 3u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(3)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(3u));
if ((stages >= 4) && doneNP) { if ((stages >= 4u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(4)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(4u));
if ((stages >= 5) && doneNP) { if ((stages >= 5u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(5)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(5u));
if ((stages >= 6) && doneNP) { if ((stages >= 6u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(6)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(6u));
if ((stages >= 7) && doneNP) { if ((stages >= 7u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(7)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(7u));
if ((stages >= 8) && doneNP) { if ((stages >= 8u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(8)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(8u));
if ((stages >= 9) && doneNP) { if ((stages >= 9u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(9)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(9u));
if ((stages >= 10) && doneNP) { if ((stages >= 10u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(0)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(10u));
if ((stages >= 11) && doneNP) { if ((stages >= 11u) && doneNP) {
FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(11)); FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(11u));
// Present in FXAA 3.11, but not actually defined anywhere. // Present in FXAA 3.11, but not actually defined anywhere.
// if ((stages >= 12) && doneNP) { // if ((stages >= 12u) && doneNP) {
// FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(12)); // FxaaStep(tex, doneN, posN, lumaEndN, doneP, posP, lumaEndP, doneNP, offNP, lumaNN, gradientScaled, quality_value(12));
// } // }
} }
@ -457,35 +481,35 @@ FxaaFloat4 FxaaPixelShader(
} }
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaFloat dstN = posM.x - posN.x; FxaaFloat dstN = posM.x - posN.x;
FxaaFloat dstP = posP.x - posM.x; FxaaFloat dstP = posP.x - posM.x;
if(!horzSpan) dstN = posM.y - posN.y; if(!horzSpan) dstN = posM.y - posN.y;
if(!horzSpan) dstP = posP.y - posM.y; if(!horzSpan) dstP = posP.y - posM.y;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaBool goodSpanN = (lumaEndN < 0.0) != lumaMLTZero; FxaaBool goodSpanN = (lumaEndN < 0.0) != lumaMLTZero;
FxaaFloat spanLength = (dstP + dstN); FxaaFloat spanLength = (dstP + dstN);
FxaaBool goodSpanP = (lumaEndP < 0.0) != lumaMLTZero; FxaaBool goodSpanP = (lumaEndP < 0.0) != lumaMLTZero;
FxaaFloat spanLengthRcp = 1.0/spanLength; FxaaFloat spanLengthRcp = 1.0/spanLength;
// ======================================== // Matches 3.11 // ======================================== // Matches 3.11
FxaaBool directionN = dstN < dstP; FxaaBool directionN = dstN < dstP;
FxaaFloat dst = min(dstN, dstP); FxaaFloat dst = min(dstN, dstP);
FxaaBool goodSpan = directionN ? goodSpanN : goodSpanP; FxaaBool goodSpan = directionN ? goodSpanN : goodSpanP;
FxaaFloat subpixG = subpixF * subpixF; FxaaFloat subpixG = subpixF * subpixF;
FxaaFloat pixelOffset = (dst * (-spanLengthRcp)) + 0.5; FxaaFloat pixelOffset = (dst * (-spanLengthRcp)) + 0.5;
FxaaFloat subpixH = subpixG * fxaaQualitySubpix; FxaaFloat subpixH = subpixG * fxaaQualitySubpix;
// ======================================== // Similar to 3.11 // ======================================== // Similar to 3.11
FxaaFloat pixelOffsetGood = goodSpan ? pixelOffset : 0.0; FxaaFloat pixelOffsetGood = goodSpan ? pixelOffset : 0.0;
FxaaFloat pixelOffsetSubpix = max(pixelOffsetGood, subpixH); FxaaFloat pixelOffsetSubpix = max(pixelOffsetGood, subpixH);
if(!horzSpan) posM.x += pixelOffsetSubpix * lengthSign; if(!horzSpan) posM.x += pixelOffsetSubpix * lengthSign;
if( horzSpan) posM.y += pixelOffsetSubpix * lengthSign; if( horzSpan) posM.y += pixelOffsetSubpix * lengthSign;
#ifdef FXAA_DISCARD #ifdef FXAA_DISCARD
return FxaaTexTop(tex, posM); return FxaaTexTop(tex, posM);
#else #else
return FxaaFloat4(FxaaTexTop(tex, posM).xyz, lumaM); return FxaaFloat4(FxaaTexTop(tex, posM).xyz, lumaM);
#endif #endif
} }
// ======================================== // // ======================================== //
@ -495,7 +519,7 @@ FxaaFloat4 FxaaPixelShader(
FxaaFloat4 ProcessPixelShader(VertexInformation vtx) : TARGET { FxaaFloat4 ProcessPixelShader(VertexInformation vtx) : TARGET {
return FxaaPixelShader( return FxaaPixelShader(
vtx.texcoord0.xy, vtx.texcoord0.xy + (ViewSize.zw * .5),
InputA, InputA,
ViewSize.zw, ViewSize.zw,
_100_SubpixelAliasingRemoval, _100_SubpixelAliasingRemoval,