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OctaCore/config/glsl/fxaa.cfg

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//
// NVIDIA FXAA 3.11 by TIMOTHY LOTTES
//
// ------------------------------------------------------------------------------
// COPYRIGHT (C) 2010, 2011 NVIDIA CORPORATION. ALL RIGHTS RESERVED.
// ------------------------------------------------------------------------------
// TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THIS SOFTWARE IS PROVIDED
// *AS IS* AND NVIDIA AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES, EITHER EXPRESS
// OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL NVIDIA
// OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR
// CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR
// LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION,
// OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE
// THIS SOFTWARE, EVEN IF NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGES.
fxaadefs = [
@(if (fxaaopt "g") [result [
#define FXAA_LUMA(color) (color.g)
]] [result [
#define FXAA_LUMA(color) (color.a)
]])
@(case $fxaapreset 0 [result [
#define FXAA_QUALITY_PRESET 10
#define fxaaQualityEdgeThreshold 0.250
#define fxaaQualityEdgeThresholdMin 0.0833
]] 1 [result [
#define FXAA_QUALITY_PRESET 12
#define fxaaQualityEdgeThreshold 0.166
#define fxaaQualityEdgeThresholdMin 0.0833
]] 2 [result [
#define FXAA_QUALITY_PRESET 24
#define fxaaQualityEdgeThreshold 0.125
#define fxaaQualityEdgeThresholdMin 0.0625
]] 3 [result [
#define FXAA_QUALITY_PRESET 39
#define fxaaQualityEdgeThreshold 0.063
#define fxaaQualityEdgeThresholdMin 0.0312
]])
#define fxaaQualitySubpix 0.75
#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
#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
#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
]
shader 0 [fxaa@fxaapreset@fxaaopts] [
in vec4 vvertex;
@(screentexcoord 0)
out vec2 texcoord0;
void main(void)
{
gl_Position = vvertex;
texcoord0 = vtexcoord0;
}
] [
@fxaadefs
in vec2 texcoord0;
uniform sampler2DRect tex0;
layout(location = 0) out vec4 fragcolor;
void main(void)
{
#define posM texcoord0
vec4 rgbyM = textureRect(tex0, posM);
float lumaS = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2( 0, 1)));
float lumaE = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2( 1, 0)));
float lumaN = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2( 0, -1)));
float lumaW = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2(-1, 0)));
#define lumaM FXAA_LUMA(rgbyM)
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)
{
fragcolor = rgbyM;
return;
}
float lumaNW = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2(-1, -1)));
float lumaSE = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2( 1, 1)));
float lumaNE = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2( 1, -1)));
float lumaSW = FXAA_LUMA(textureRectOffset(tex0, posM, ivec2(-1, 1)));
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;
bool horzSpan = edgeHorz >= edgeVert;
float subpixA = subpixNSWE * 2.0 + subpixNWSWNESE;
if(!horzSpan) lumaN = lumaW;
if(!horzSpan) lumaS = lumaE;
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));
float lengthSign = pairN ? -1.0 : 1.0;
float subpixC = clamp(abs(subpixB) * subpixRcpRange, 0.0, 1.0);
vec2 posB = posM;
vec2 offNP;
offNP.x = (!horzSpan) ? 0.0 : 1.0;
offNP.y = ( horzSpan) ? 0.0 : 1.0;
if(!horzSpan) posB.x += lengthSign * 0.5;
if( horzSpan) posB.y += lengthSign * 0.5;
vec2 posN = posB - offNP * FXAA_QUALITY_P0;
vec2 posP = posB + offNP * FXAA_QUALITY_P0;
float subpixD = ((-2.0)*subpixC) + 3.0;
float lumaEndN = FXAA_LUMA(textureRect(tex0, posN));
float subpixE = subpixC * subpixC;
float lumaEndP = FXAA_LUMA(textureRect(tex0, 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 contN = abs(lumaEndN) < gradientScaled;
bool contP = abs(lumaEndP) < gradientScaled;
if(contN) posN -= offNP * FXAA_QUALITY_P1;
if(contP) posP += offNP * FXAA_QUALITY_P1;
@(loopconcat+ i 2 10 [result [
#if (FXAA_QUALITY_PS > @i)
if(contN || contP)
{
if(contN) lumaEndN = FXAA_LUMA(textureRect(tex0, posN));
if(contP) lumaEndP = FXAA_LUMA(textureRect(tex0, posP));
if(contN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(contP) lumaEndP = lumaEndP - lumaNN * 0.5;
contN = abs(lumaEndN) < gradientScaled;
contP = abs(lumaEndP) < gradientScaled;
if(contN) posN -= offNP * FXAA_QUALITY_P@i;
if(contP) posP += offNP * FXAA_QUALITY_P@i;
]])
@(loopconcat+ i 2 10 [result [
}
#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);
vec2 posS = posM;
if(!horzSpan) posS.x += pixelOffsetSubpix * lengthSign;
if( horzSpan) posS.y += pixelOffsetSubpix * lengthSign;
fragcolor = textureRect(tex0, posS);
}
]
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