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0ad/binaries/data/mods/mod/shaders/glsl/fxaa.fs
Ralph Sennhauser 58219b974c
Fix trailing whitespace and add pre-commit hook 
Some have their editor configured to remove trailing whitespace and
editing such a file would "fix" it, adding an unrelated change.

Fix whitespace violations excluding third party libs and generated files
like glad or patches.

Enable pre-commit hook trailing-whitespace to enforce it in the future.

Fixes: #8016
Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
2025-06-15 20:08:48 +02:00

631 lines
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#version 130
// Our GLSL adoptation of:
//
// * Removed all unrelated code (such as HLSL or console implementations).
// * Removed unused macro (such as FXAA_DISCARD, FXAA_GATHER4_ALPHA, ...).
// * Luma calculated by 3 components instead of the only green one.
#include "common/fragment.h"
#include "common/stage.h"
#define FXAA_QUALITY__PRESET 10
//
// NVIDIA FXAA 3.11 by TIMOTHY LOTTES
//
// Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
/*============================================================================
FXAA QUALITY - PRESETS
============================================================================*/
/*============================================================================
FXAA QUALITY - MEDIUM DITHER PRESETS
============================================================================*/
#if (FXAA_QUALITY__PRESET == 10)
#define FXAA_QUALITY__PS 3
#define FXAA_QUALITY__P0 1.5
#define FXAA_QUALITY__P1 3.0
#define FXAA_QUALITY__P2 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 11)
#define FXAA_QUALITY__PS 4
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 3.0
#define FXAA_QUALITY__P3 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 12)
#define FXAA_QUALITY__PS 5
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 4.0
#define FXAA_QUALITY__P4 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 13)
#define FXAA_QUALITY__PS 6
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 4.0
#define FXAA_QUALITY__P5 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 14)
#define FXAA_QUALITY__PS 7
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 4.0
#define FXAA_QUALITY__P6 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 15)
#define FXAA_QUALITY__PS 8
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 2.0
#define FXAA_QUALITY__P6 4.0
#define FXAA_QUALITY__P7 12.0
#endif
/*============================================================================
FXAA QUALITY - LOW DITHER PRESETS
============================================================================*/
#if (FXAA_QUALITY__PRESET == 20)
#define FXAA_QUALITY__PS 3
#define FXAA_QUALITY__P0 1.5
#define FXAA_QUALITY__P1 2.0
#define FXAA_QUALITY__P2 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 21)
#define FXAA_QUALITY__PS 4
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 22)
#define FXAA_QUALITY__PS 5
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 23)
#define FXAA_QUALITY__PS 6
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 24)
#define FXAA_QUALITY__PS 7
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 3.0
#define FXAA_QUALITY__P6 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 25)
#define FXAA_QUALITY__PS 8
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 2.0
#define FXAA_QUALITY__P6 4.0
#define FXAA_QUALITY__P7 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 26)
#define FXAA_QUALITY__PS 9
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 2.0
#define FXAA_QUALITY__P6 2.0
#define FXAA_QUALITY__P7 4.0
#define FXAA_QUALITY__P8 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 27)
#define FXAA_QUALITY__PS 10
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 2.0
#define FXAA_QUALITY__P6 2.0
#define FXAA_QUALITY__P7 2.0
#define FXAA_QUALITY__P8 4.0
#define FXAA_QUALITY__P9 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 28)
#define FXAA_QUALITY__PS 11
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 2.0
#define FXAA_QUALITY__P6 2.0
#define FXAA_QUALITY__P7 2.0
#define FXAA_QUALITY__P8 2.0
#define FXAA_QUALITY__P9 4.0
#define FXAA_QUALITY__P10 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PRESET == 29)
#define FXAA_QUALITY__PS 12
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.5
#define FXAA_QUALITY__P2 2.0
#define FXAA_QUALITY__P3 2.0
#define FXAA_QUALITY__P4 2.0
#define FXAA_QUALITY__P5 2.0
#define FXAA_QUALITY__P6 2.0
#define FXAA_QUALITY__P7 2.0
#define FXAA_QUALITY__P8 2.0
#define FXAA_QUALITY__P9 2.0
#define FXAA_QUALITY__P10 4.0
#define FXAA_QUALITY__P11 8.0
#endif
/*============================================================================
FXAA QUALITY - EXTREME QUALITY
============================================================================*/
#if (FXAA_QUALITY__PRESET == 39)
#define FXAA_QUALITY__PS 12
#define FXAA_QUALITY__P0 1.0
#define FXAA_QUALITY__P1 1.0
#define FXAA_QUALITY__P2 1.0
#define FXAA_QUALITY__P3 1.0
#define FXAA_QUALITY__P4 1.0
#define FXAA_QUALITY__P5 1.5
#define FXAA_QUALITY__P6 2.0
#define FXAA_QUALITY__P7 2.0
#define FXAA_QUALITY__P8 2.0
#define FXAA_QUALITY__P9 2.0
#define FXAA_QUALITY__P10 4.0
#define FXAA_QUALITY__P11 8.0
#endif
#define FxaaTexTop(t, p) textureLod((t), (p), 0.0)
#define FxaaTexOff(t, p, o, r) textureLod((t), (p) + (o) * (r), 0.0)
#define FxaaLuma(rgba) dot((rgba).rgb, vec3(0.299, 0.587, 0.114))
vec4 FxaaPixelShader(
//
// Use noperspective interpolation here (turn off perspective interpolation).
// {xy} = center of pixel
vec2 pos,
//
// Input color texture.
// {rgb_} = color in linear or perceptual color space
sampler2D tex,
//
// Only used on FXAA Quality.
// This must be from a constant/uniform.
// {x_} = 1.0/screenWidthInPixels
// {_y} = 1.0/screenHeightInPixels
vec2 fxaaQualityRcpFrame,
//
// It is here now to allow easier tuning.
// Choose the amount of sub-pixel aliasing removal.
// This can effect sharpness.
// 1.00 - upper limit (softer)
// 0.75 - default amount of filtering
// 0.50 - lower limit (sharper, less sub-pixel aliasing removal)
// 0.25 - almost off
// 0.00 - completely off
float fxaaQualitySubpix,
//
// It is here now to allow easier tuning.
// The minimum amount of local contrast required to apply algorithm.
// 0.333 - too little (faster)
// 0.250 - low quality
// 0.166 - default
// 0.125 - high quality
// 0.063 - overkill (slower)
float fxaaQualityEdgeThreshold,
//
// It is here now to allow easier tuning.
// Trims the algorithm from processing darks.
// 0.0833 - upper limit (default, the start of visible unfiltered edges)
// 0.0625 - high quality (faster)
// 0.0312 - visible limit (slower)
float fxaaQualityEdgeThresholdMin)
{
/*--------------------------------------------------------------------------*/
vec2 posM;
posM.x = pos.x;
posM.y = pos.y;
vec4 rgbyM = FxaaTexTop(tex, posM);
float lumaM = FxaaLuma(rgbyM);
float lumaS = FxaaLuma(FxaaTexOff(tex, posM, vec2(0, 1), fxaaQualityRcpFrame.xy));
float lumaE = FxaaLuma(FxaaTexOff(tex, posM, vec2(1, 0), fxaaQualityRcpFrame.xy));
float lumaN = FxaaLuma(FxaaTexOff(tex, posM, vec2(0, -1), fxaaQualityRcpFrame.xy));
float lumaW = FxaaLuma(FxaaTexOff(tex, posM, vec2(-1, 0), fxaaQualityRcpFrame.xy));
/*--------------------------------------------------------------------------*/
float maxSM = max(lumaS, lumaM);
float minSM = min(lumaS, lumaM);
float maxESM = max(lumaE, maxSM);
float minESM = min(lumaE, minSM);
float maxWN = max(lumaN, lumaW);
float minWN = min(lumaN, lumaW);
float rangeMax = max(maxWN, maxESM);
float rangeMin = min(minWN, minESM);
float rangeMaxScaled = rangeMax * fxaaQualityEdgeThreshold;
float range = rangeMax - rangeMin;
float rangeMaxClamped = max(fxaaQualityEdgeThresholdMin, rangeMaxScaled);
bool earlyExit = range < rangeMaxClamped;
/*--------------------------------------------------------------------------*/
if(earlyExit)
return rgbyM;
/*--------------------------------------------------------------------------*/
float lumaNW = FxaaLuma(FxaaTexOff(tex, posM, vec2(-1,-1), fxaaQualityRcpFrame.xy));
float lumaSE = FxaaLuma(FxaaTexOff(tex, posM, vec2( 1, 1), fxaaQualityRcpFrame.xy));
float lumaNE = FxaaLuma(FxaaTexOff(tex, posM, vec2( 1,-1), fxaaQualityRcpFrame.xy));
float lumaSW = FxaaLuma(FxaaTexOff(tex, posM, vec2(-1, 1), fxaaQualityRcpFrame.xy));
/*--------------------------------------------------------------------------*/
float lumaNS = lumaN + lumaS;
float lumaWE = lumaW + lumaE;
float subpixRcpRange = 1.0/range;
float subpixNSWE = lumaNS + lumaWE;
float edgeHorz1 = (-2.0 * lumaM) + lumaNS;
float edgeVert1 = (-2.0 * lumaM) + lumaWE;
/*--------------------------------------------------------------------------*/
float lumaNESE = lumaNE + lumaSE;
float lumaNWNE = lumaNW + lumaNE;
float edgeHorz2 = (-2.0 * lumaE) + lumaNESE;
float edgeVert2 = (-2.0 * lumaN) + lumaNWNE;
/*--------------------------------------------------------------------------*/
float lumaNWSW = lumaNW + lumaSW;
float lumaSWSE = lumaSW + lumaSE;
float edgeHorz4 = (abs(edgeHorz1) * 2.0) + abs(edgeHorz2);
float edgeVert4 = (abs(edgeVert1) * 2.0) + abs(edgeVert2);
float edgeHorz3 = (-2.0 * lumaW) + lumaNWSW;
float edgeVert3 = (-2.0 * lumaS) + lumaSWSE;
float edgeHorz = abs(edgeHorz3) + edgeHorz4;
float edgeVert = abs(edgeVert3) + edgeVert4;
/*--------------------------------------------------------------------------*/
float subpixNWSWNESE = lumaNWSW + lumaNESE;
float lengthSign = fxaaQualityRcpFrame.x;
bool horzSpan = edgeHorz >= edgeVert;
float subpixA = subpixNSWE * 2.0 + subpixNWSWNESE;
/*--------------------------------------------------------------------------*/
if(!horzSpan) lumaN = lumaW;
if(!horzSpan) lumaS = lumaE;
if(horzSpan) lengthSign = fxaaQualityRcpFrame.y;
float subpixB = (subpixA * (1.0/12.0)) - lumaM;
/*--------------------------------------------------------------------------*/
float gradientN = lumaN - lumaM;
float gradientS = lumaS - lumaM;
float lumaNN = lumaN + lumaM;
float lumaSS = lumaS + lumaM;
bool pairN = abs(gradientN) >= abs(gradientS);
float gradient = max(abs(gradientN), abs(gradientS));
if(pairN) lengthSign = -lengthSign;
float subpixC = clamp(abs(subpixB) * subpixRcpRange, 0.0, 1.0);
/*--------------------------------------------------------------------------*/
vec2 posB;
posB.x = posM.x;
posB.y = posM.y;
vec2 offNP;
offNP.x = (!horzSpan) ? 0.0 : fxaaQualityRcpFrame.x;
offNP.y = ( horzSpan) ? 0.0 : fxaaQualityRcpFrame.y;
if(!horzSpan) posB.x += lengthSign * 0.5;
if( horzSpan) posB.y += lengthSign * 0.5;
/*--------------------------------------------------------------------------*/
vec2 posN;
posN.x = posB.x - offNP.x * FXAA_QUALITY__P0;
posN.y = posB.y - offNP.y * FXAA_QUALITY__P0;
vec2 posP;
posP.x = posB.x + offNP.x * FXAA_QUALITY__P0;
posP.y = posB.y + offNP.y * FXAA_QUALITY__P0;
float subpixD = ((-2.0)*subpixC) + 3.0;
float lumaEndN = FxaaLuma(FxaaTexTop(tex, posN));
float subpixE = subpixC * subpixC;
float lumaEndP = FxaaLuma(FxaaTexTop(tex, posP));
/*--------------------------------------------------------------------------*/
if(!pairN) lumaNN = lumaSS;
float gradientScaled = gradient * 1.0/4.0;
float lumaMM = lumaM - lumaNN * 0.5;
float subpixF = subpixD * subpixE;
bool lumaMLTZero = lumaMM < 0.0;
/*--------------------------------------------------------------------------*/
lumaEndN -= lumaNN * 0.5;
lumaEndP -= lumaNN * 0.5;
bool doneN = abs(lumaEndN) >= gradientScaled;
bool doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P1;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P1;
bool doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P1;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P1;
/*--------------------------------------------------------------------------*/
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P2;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P2;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P2;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P2;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 3)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P3;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P3;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P3;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P3;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 4)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P4;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P4;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P4;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P4;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 5)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P5;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P5;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P5;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P5;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 6)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P6;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P6;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P6;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P6;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 7)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P7;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P7;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P7;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P7;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 8)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P8;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P8;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P8;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P8;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 9)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P9;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P9;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P9;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P9;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 10)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P10;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P10;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P10;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P10;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 11)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P11;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P11;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P11;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P11;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY__PS > 12)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY__P12;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY__P12;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY__P12;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY__P12;
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
/*--------------------------------------------------------------------------*/
float dstN = posM.x - posN.x;
float dstP = posP.x - posM.x;
if(!horzSpan) dstN = posM.y - posN.y;
if(!horzSpan) dstP = posP.y - posM.y;
/*--------------------------------------------------------------------------*/
bool goodSpanN = (lumaEndN < 0.0) != lumaMLTZero;
float spanLength = (dstP + dstN);
bool goodSpanP = (lumaEndP < 0.0) != lumaMLTZero;
float spanLengthRcp = 1.0/spanLength;
/*--------------------------------------------------------------------------*/
bool directionN = dstN < dstP;
float dst = min(dstN, dstP);
bool goodSpan = directionN ? goodSpanN : goodSpanP;
float subpixG = subpixF * subpixF;
float pixelOffset = (dst * (-spanLengthRcp)) + 0.5;
float subpixH = subpixG * fxaaQualitySubpix;
/*--------------------------------------------------------------------------*/
float pixelOffsetGood = goodSpan ? pixelOffset : 0.0;
float pixelOffsetSubpix = max(pixelOffsetGood, subpixH);
if(!horzSpan) posM.x += pixelOffsetSubpix * lengthSign;
if( horzSpan) posM.y += pixelOffsetSubpix * lengthSign;
return vec4(FxaaTexTop(tex, posM).xyz, lumaM);
}
BEGIN_DRAW_TEXTURES
TEXTURE_2D(0, renderedTex)
END_DRAW_TEXTURES
BEGIN_DRAW_UNIFORMS
UNIFORM(float, width)
UNIFORM(float, height)
END_DRAW_UNIFORMS
VERTEX_OUTPUT(0, vec2, v_tex);
void main()
{
// See comment for the FxaaPixelShader function.
const float fxaaQualitySubpix = 0.75;
const float fxaaQualityEdgeThreshold = 0.125;
const float fxaaQualityEdgeThresholdMin = 0.0312;
OUTPUT_FRAGMENT_SINGLE_COLOR(FxaaPixelShader(
v_tex, GET_DRAW_TEXTURE_2D(renderedTex),
vec2(1.0, 1.0) / vec2(width, height),
fxaaQualitySubpix,
fxaaQualityEdgeThreshold,
fxaaQualityEdgeThresholdMin));
}
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