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materialsystem/stdshaders/filmgrain_vs20.fxc

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+#include "common_vs_fxc.h"
+
+struct VS_INPUT
+{
+	float3 vPos						: POSITION;
+	float2 vInputImageCoord			: TEXCOORD0;
+};
+
+struct VS_OUTPUT
+{
+    float4 projPos					: POSITION;	
+	float2 InputImageCoord			: TEXCOORD0;
+	float2 FilmGrainCoord			: TEXCOORD1;
+};
+
+// 
+const float4 cFilmGrainOffset	:  register( SHADER_SPECIFIC_CONST_0 );  // should be SHADER_SPECIFIC_CONST_0
+
+
+VS_OUTPUT main( const VS_INPUT v )
+{
+	VS_OUTPUT o = ( VS_OUTPUT )0;
+
+	// Just copy these through to the output...
+	o.projPos = float4( v.vPos, 1.0f );
+	o.InputImageCoord  = v.vInputImageCoord;
+
+	// Scale and bias the input coordinates to get grain coordinates
+	o.FilmGrainCoord.xy = v.vInputImageCoord.xy * cFilmGrainOffset.xy + cFilmGrainOffset.zw;
+
+	return o;
+}