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base/renderprogs/fxaa.pixel

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+/*
+===========================================================================
+
+Doom 3 BFG Edition GPL Source Code
+Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 
+
+This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  
+
+Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.
+
+In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.
+
+If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
+
+===========================================================================
+*/
+
+#include "global.inc"
+#define FXAA_GREEN_AS_LUMA 1
+#define FXAA_EARLY_EXIT 0
+#include "Fxaa3_11.h"
+
+uniform sampler2D samp0 : register(s0);
+uniform sampler2D samp1 : register(s1); // exponent bias -1
+uniform sampler2D samp2 : register(s2); // exponent bias -2
+
+uniform float4 rpUser0 : register( c128 );
+uniform float4 rpUser1 : register( c129 );
+uniform float4 rpUser2 : register( c130 );
+uniform float4 rpUser3 : register( c131 );
+uniform float4 rpUser4 : register( c132 );
+uniform float4 rpUser5 : register( c133 );
+uniform float4 rpUser6 : register( c134 );
+
+struct PS_IN {
+	float4 position : VPOS;
+	float2 texcoord0 : TEXCOORD0_centroid;
+};
+
+struct PS_OUT {	
+	float4 color : COLOR;
+};
+
+void main( PS_IN fragment, out PS_OUT result ) {
+
+	const float4 FXAAQualityRCPFrame = rpUser0;
+	const float4 FXAAConsoleRcpFrameOpt = rpUser1;
+	const float4 FXAAConsoleRcpFrameOpt2 = rpUser2;
+	const float4 FXAAConsole360RcpFrameOpt2 = rpUser3;
+	const float4 FXAAQualityParms = rpUser4;
+	const float4 FXAAConsoleEdgeParms = rpUser5;
+	const float4 FXAAConsole360ConstDir = rpUser6;
+
+	// Inputs - see more info in fxaa3_11.hfile
+	FxaaFloat2	fxaaPos = fragment.texcoord0;
+	FxaaFloat4	fxaaConsolePos;
+
+	float2 halfPixelOffset = float2( 0.5, 0.5 ) * FXAAQualityRCPFrame.xy;
+	fxaaConsolePos.xy = fxaaPos.xy - ( halfPixelOffset );
+	fxaaConsolePos.zw = fxaaPos.xy + ( halfPixelOffset );
+	FxaaFloat2	fxaaQualityRcpFrame = FXAAQualityRCPFrame.xy;
+	FxaaFloat4	fxaaConsoleRcpFrameOpt = FXAAConsoleRcpFrameOpt;
+	FxaaFloat4	fxaaConsoleRcpFrameOpt2 = FXAAConsoleRcpFrameOpt2;
+	FxaaFloat4	fxaaConsole360RcpFrameOpt2 = FXAAConsole360RcpFrameOpt2;
+
+	// Quality parms
+	FxaaFloat	fxaaQualitySubpix = FXAAQualityParms.x;
+	FxaaFloat	fxaaQualityEdgeThreshold = FXAAQualityParms.y;
+	FxaaFloat	fxaaQualityEdgeThresholdMin = FXAAQualityParms.z;
+
+	// Console specific Parms
+	FxaaFloat	fxaaConsoleEdgeSharpness = FXAAConsoleEdgeParms.x;
+	FxaaFloat	fxaaConsoleEdgeThreshold = FXAAConsoleEdgeParms.y;
+	FxaaFloat	fxaaConsoleEdgeThresholdMin = FXAAConsoleEdgeParms.z;
+
+	// 360 specific parms these have to come from a constant register so that the compiler
+	// does not unoptimize the shader
+	FxaaFloat4	fxaaConsole360ConstDir = FXAAConsole360ConstDir;
+
+
+	float4 colorSample = FxaaPixelShader(	fxaaPos,
+											fxaaConsolePos,
+											samp0,
+											samp1,
+											samp2,
+											fxaaQualityRcpFrame,
+											fxaaConsoleRcpFrameOpt,
+											fxaaConsoleRcpFrameOpt2,
+											fxaaConsole360RcpFrameOpt2,
+											fxaaQualitySubpix,
+											fxaaQualityEdgeThreshold,
+											fxaaQualityEdgeThresholdMin,
+											fxaaConsoleEdgeSharpness,
+											fxaaConsoleEdgeThreshold,
+											fxaaConsoleEdgeThresholdMin,
+											fxaaConsole360ConstDir );
+											
+	result.color = colorSample;
+}