/** * @license * 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. */ // NVIDIA GameWorks Graphics Samples GitHub link: https://github.com/NVIDIAGameWorks/GraphicsSamples // Original FXAA 3.11 shader link: https://github.com/NVIDIAGameWorks/GraphicsSamples/blob/master/samples/es3-kepler/FXAA/FXAA3_11.h // Steps used to integrate into Cesium: // * The following defines are set: // #define FXAA_PC 1 // #define FXAA_WEBGL_1 1 // #define FXAA_GREEN_AS_LUMA 1 // #define FXAA_EARLY_EXIT 1 // #define FXAA_GLSL_120 1 // * All other preprocessor directives besides the FXAA_QUALITY__P* directives were removed. // * Double underscores are invalid for preprocessor directives so replace them with a single underscore. Replace // /FXAA_QUALITY__P(.*)/g with /FXAA_QUALITY__P$1/. // * There are no implicit conversions from ivec* to vec* so replace: // #define FxaaInt2 ivec2 // with // #define FxaaInt2 vec2 // * The texture2DLod function is only available in vertex shaders so replace: // #define FxaaTexTop(t, p) texture2DLod(t, p, 0.0) // #define FxaaTexOff(t, p, o, r) texture2DLod(t, p + (o * r), 0.0) // with // #define FxaaTexTop(t, p) texture2D(t, p) // #define FxaaTexOff(t, p, o, r) texture2D(t, p + (o * r)) // * FXAA_QUALITY_PRESET is prepended in the javascript code. We may want to expose that setting in the future. // * The following parameters to FxaaPixelShader are unused and can be removed: // fxaaConsolePosPos // fxaaConsoleRcpFrameOpt // fxaaConsoleRcpFrameOpt2 // fxaaConsole360RcpFrameOpt2 // fxaaConsoleEdgeSharpness // fxaaConsoleEdgeThreshold // fxaaConsoleEdgeThresholdMi // fxaaConsole360ConstDir // // Choose the quality preset. // This needs to be compiled into the shader as it effects code. // Best option to include multiple presets is to // in each shader define the preset, then include this file. // // OPTIONS // ----------------------------------------------------------------------- // 10 to 15 - default medium dither (10=fastest, 15=highest quality) // 20 to 29 - less dither, more expensive (20=fastest, 29=highest quality) // 39 - no dither, very expensive // // NOTES // ----------------------------------------------------------------------- // 12 = slightly faster then FXAA 3.9 and higher edge quality (default) // 13 = about same speed as FXAA 3.9 and better than 12 // 23 = closest to FXAA 3.9 visually and performance wise // _ = the lowest digit is directly related to performance // _ = the highest digit is directly related to style // //#define FXAA_QUALITY_PRESET 12 #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 #define FxaaBool bool #define FxaaFloat float #define FxaaFloat2 vec2 #define FxaaFloat3 vec3 #define FxaaFloat4 vec4 #define FxaaHalf float #define FxaaHalf2 vec2 #define FxaaHalf3 vec3 #define FxaaHalf4 vec4 #define FxaaInt2 vec2 #define FxaaTex sampler2D #define FxaaSat(x) clamp(x, 0.0, 1.0) #define FxaaTexTop(t, p) texture2D(t, p) #define FxaaTexOff(t, p, o, r) texture2D(t, p + (o * r)) FxaaFloat FxaaLuma(FxaaFloat4 rgba) { return rgba.y; } FxaaFloat4 FxaaPixelShader( // // Use noperspective interpolation here (turn off perspective interpolation). // {xy} = center of pixel FxaaFloat2 pos, // // Input color texture. // {rgb_} = color in linear or perceptual color space // if (FXAA_GREEN_AS_LUMA == 0) // {___a} = luma in perceptual color space (not linear) FxaaTex tex, // // Only used on FXAA Quality. // This must be from a constant/uniform. // {x_} = 1.0/screenWidthInPixels // {_y} = 1.0/screenHeightInPixels FxaaFloat2 fxaaQualityRcpFrame, // // Only used on FXAA Quality. // This used to be the FXAA_QUALITY_SUBPIX define. // 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 FxaaFloat fxaaQualitySubpix, // // Only used on FXAA Quality. // This used to be the FXAA_QUALITY_EDGE_THRESHOLD define. // 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) FxaaFloat fxaaQualityEdgeThreshold, // // Only used on FXAA Quality. // This used to be the FXAA_QUALITY_EDGE_THRESHOLD_MIN define. // 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) // Special notes when using FXAA_GREEN_AS_LUMA, // Likely want to set this to zero. // As colors that are mostly not-green // will appear very dark in the green channel! // Tune by looking at mostly non-green content, // then start at zero and increase until aliasing is a problem. FxaaFloat fxaaQualityEdgeThresholdMin ) { /*--------------------------------------------------------------------------*/ FxaaFloat2 posM; posM.x = pos.x; posM.y = pos.y; FxaaFloat4 rgbyM = FxaaTexTop(tex, posM); #define lumaM rgbyM.y FxaaFloat lumaS = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 0, 1), 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 lumaW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 0), fxaaQualityRcpFrame.xy)); /*--------------------------------------------------------------------------*/ FxaaFloat maxSM = max(lumaS, lumaM); FxaaFloat minSM = min(lumaS, lumaM); FxaaFloat maxESM = max(lumaE, maxSM); FxaaFloat minESM = min(lumaE, minSM); FxaaFloat maxWN = max(lumaN, lumaW); FxaaFloat minWN = min(lumaN, lumaW); FxaaFloat rangeMax = max(maxWN, maxESM); FxaaFloat rangeMin = min(minWN, minESM); FxaaFloat rangeMaxScaled = rangeMax * fxaaQualityEdgeThreshold; FxaaFloat range = rangeMax - rangeMin; FxaaFloat rangeMaxClamped = max(fxaaQualityEdgeThresholdMin, rangeMaxScaled); FxaaBool earlyExit = range < rangeMaxClamped; /*--------------------------------------------------------------------------*/ if(earlyExit) return rgbyM; /*--------------------------------------------------------------------------*/ FxaaFloat lumaNW = 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 lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 1), fxaaQualityRcpFrame.xy)); /*--------------------------------------------------------------------------*/ FxaaFloat lumaNS = lumaN + lumaS; FxaaFloat lumaWE = lumaW + lumaE; FxaaFloat subpixRcpRange = 1.0/range; FxaaFloat subpixNSWE = lumaNS + lumaWE; FxaaFloat edgeHorz1 = (-2.0 * lumaM) + lumaNS; FxaaFloat edgeVert1 = (-2.0 * lumaM) + lumaWE; /*--------------------------------------------------------------------------*/ FxaaFloat lumaNESE = lumaNE + lumaSE; FxaaFloat lumaNWNE = lumaNW + lumaNE; FxaaFloat edgeHorz2 = (-2.0 * lumaE) + lumaNESE; FxaaFloat edgeVert2 = (-2.0 * lumaN) + lumaNWNE; /*--------------------------------------------------------------------------*/ FxaaFloat lumaNWSW = lumaNW + lumaSW; FxaaFloat lumaSWSE = lumaSW + lumaSE; FxaaFloat edgeHorz4 = (abs(edgeHorz1) * 2.0) + abs(edgeHorz2); FxaaFloat edgeVert4 = (abs(edgeVert1) * 2.0) + abs(edgeVert2); FxaaFloat edgeHorz3 = (-2.0 * lumaW) + lumaNWSW; FxaaFloat edgeVert3 = (-2.0 * lumaS) + lumaSWSE; FxaaFloat edgeHorz = abs(edgeHorz3) + edgeHorz4; FxaaFloat edgeVert = abs(edgeVert3) + edgeVert4; /*--------------------------------------------------------------------------*/ FxaaFloat subpixNWSWNESE = lumaNWSW + lumaNESE; FxaaFloat lengthSign = fxaaQualityRcpFrame.x; FxaaBool horzSpan = edgeHorz >= edgeVert; FxaaFloat subpixA = subpixNSWE * 2.0 + subpixNWSWNESE; /*--------------------------------------------------------------------------*/ if(!horzSpan) lumaN = lumaW; if(!horzSpan) lumaS = lumaE; if(horzSpan) lengthSign = fxaaQualityRcpFrame.y; FxaaFloat subpixB = (subpixA * (1.0/12.0)) - lumaM; /*--------------------------------------------------------------------------*/ FxaaFloat gradientN = lumaN - lumaM; FxaaFloat gradientS = lumaS - lumaM; FxaaFloat lumaNN = lumaN + lumaM; FxaaFloat lumaSS = lumaS + lumaM; FxaaBool pairN = abs(gradientN) >= abs(gradientS); FxaaFloat gradient = max(abs(gradientN), abs(gradientS)); if(pairN) lengthSign = -lengthSign; FxaaFloat subpixC = FxaaSat(abs(subpixB) * subpixRcpRange); /*--------------------------------------------------------------------------*/ FxaaFloat2 posB; posB.x = posM.x; posB.y = posM.y; FxaaFloat2 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; /*--------------------------------------------------------------------------*/ FxaaFloat2 posN; posN.x = posB.x - offNP.x * FXAA_QUALITY_P0; posN.y = posB.y - offNP.y * FXAA_QUALITY_P0; FxaaFloat2 posP; posP.x = posB.x + offNP.x * FXAA_QUALITY_P0; posP.y = posB.y + offNP.y * FXAA_QUALITY_P0; FxaaFloat subpixD = ((-2.0)*subpixC) + 3.0; FxaaFloat lumaEndN = FxaaLuma(FxaaTexTop(tex, posN)); FxaaFloat subpixE = subpixC * subpixC; FxaaFloat lumaEndP = FxaaLuma(FxaaTexTop(tex, posP)); /*--------------------------------------------------------------------------*/ if(!pairN) lumaNN = lumaSS; FxaaFloat gradientScaled = gradient * 1.0/4.0; FxaaFloat lumaMM = lumaM - lumaNN * 0.5; FxaaFloat subpixF = subpixD * subpixE; FxaaBool lumaMLTZero = lumaMM < 0.0; /*--------------------------------------------------------------------------*/ lumaEndN -= lumaNN * 0.5; lumaEndP -= lumaNN * 0.5; FxaaBool doneN = abs(lumaEndN) >= gradientScaled; FxaaBool doneP = abs(lumaEndP) >= gradientScaled; if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P1; if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P1; FxaaBool 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 /*--------------------------------------------------------------------------*/ } /*--------------------------------------------------------------------------*/ FxaaFloat dstN = posM.x - posN.x; FxaaFloat dstP = posP.x - posM.x; if(!horzSpan) dstN = posM.y - posN.y; if(!horzSpan) dstP = posP.y - posM.y; /*--------------------------------------------------------------------------*/ FxaaBool goodSpanN = (lumaEndN < 0.0) != lumaMLTZero; FxaaFloat spanLength = (dstP + dstN); FxaaBool goodSpanP = (lumaEndP < 0.0) != lumaMLTZero; FxaaFloat spanLengthRcp = 1.0/spanLength; /*--------------------------------------------------------------------------*/ FxaaBool directionN = dstN < dstP; FxaaFloat dst = min(dstN, dstP); FxaaBool goodSpan = directionN ? goodSpanN : goodSpanP; FxaaFloat subpixG = subpixF * subpixF; FxaaFloat pixelOffset = (dst * (-spanLengthRcp)) + 0.5; FxaaFloat subpixH = subpixG * fxaaQualitySubpix; /*--------------------------------------------------------------------------*/ FxaaFloat pixelOffsetGood = goodSpan ? pixelOffset : 0.0; FxaaFloat pixelOffsetSubpix = max(pixelOffsetGood, subpixH); if(!horzSpan) posM.x += pixelOffsetSubpix * lengthSign; if( horzSpan) posM.y += pixelOffsetSubpix * lengthSign; return FxaaFloat4(FxaaTexTop(tex, posM).xyz, lumaM); }