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31 lines
643 B
31 lines
643 B
//========== Copyright (c) Valve Corporation, All rights reserved. ==========//
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sampler g_sBase : register( s0 );
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float g_flAlpha : register( c0 );
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float g_flDesaturate : register( c1 );
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float3 g_vColorFade : register( c2 );
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struct PS_INPUT
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{
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float2 uv : TEXCOORD0;
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};
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float4 main( PS_INPUT i ) : COLOR0
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{
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// Fetch blurred texel
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float4 o = tex2D( g_sBase, i.uv );
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// Desaturate
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float3 tmpv = { 0.2125, 0.7154, 0.0721 };
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float flLuminance = dot( o.rgb, tmpv.rgb );
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o.rgb = lerp( o.rgb, flLuminance, saturate( g_flDesaturate ) );
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// Color fade
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o.rgb *= g_vColorFade.rgb;
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// Set alpha blend value
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o.a = g_flAlpha;
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return o;
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}
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