initial

materialsystem/stdshaders/haloadd1d_ps2x.fxc

@@ -0,0 +1,35 @@
+//======= Copyright <20> 1996-2006, Valve Corporation, All rights reserved. ======
+
+#include "common_ps_fxc.h"
+
+sampler TexSampler : register( s0 );
+sampler TexRed : register( s1 );
+sampler TexGreen : register( s2 );
+sampler TexBlue : register( s3 );
+
+float g_flDimValue : register( c0 );
+
+struct PS_INPUT
+{
+	float2 baseTexCoord				: TEXCOORD0;		// Base texture coordinate
+};
+
+float4 main( PS_INPUT i ) : COLOR
+{
+	float4 result = tex2D( TexSampler, i.baseTexCoord );
+
+	// Scale by dim value before computing luminance below
+	result.rgb *= saturate( g_flDimValue );
+
+	// Fetch into 1D textures based on the intensity of each color channel and sum
+	float4 vRed = tex2D( TexRed, pow( result.r, 0.45 ) );
+	float4 vGreen = tex2D( TexGreen, pow( result.g, 0.45 ) );
+	float4 vBlue = tex2D( TexBlue, pow( result.b, 0.45 ) );
+	result.rgb = vRed.rgb + vGreen.rgb + vBlue.rgb;
+
+	// Store max color component in alpha for alpha blend of one/invSrcAlpha
+	float flLuminance = max( result.r, max( result.g, result.b ) );
+	result.a = flLuminance;
+
+	return result.rgba;
+}