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44 lines
1.4 KiB
44 lines
1.4 KiB
//========== Copyright (c) Valve Corporation, All rights reserved. ==========//
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#include "common_ps_fxc.h"
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sampler FBSampler : register( s0 );
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sampler BloomSampler : register( s1 );
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sampler Exposure_Sampler : register( s2 );
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const float4 settings : register( c0 );
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// x=sharpness,y=woodcut,z=bloom_amt,w=alpha sharpen factor
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const float4 settings2 : register( c1 ); // x=bloom exp,y=vignette min scale z=vignette_power
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const float4 settings3 : register( c2 ); // x=autoexpose min y=autoexpose_max
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struct PS_INPUT
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{
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float2 texCoord : TEXCOORD0;
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};
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float4 main( PS_INPUT i ) : COLOR
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{
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float4 fbSample = tex2D( FBSampler, i.texCoord );
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float4 bloom=tex2D(BloomSampler,i.texCoord);
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float4 exposure_data=tex2D(Exposure_Sampler, float2( 0.0f, 0.0f ) );
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float avg_lum=exposure_data.r;
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float tmscale=max(0.18/max(avg_lum,0.0001),settings3.x);
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tmscale=min(tmscale,settings3.y);
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float2 xofs=2*(i.texCoord-float2(0.5,0.5));
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float dist=(1.0/2.0)*(xofs.x*xofs.x+xofs.y*xofs.y);
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float vig=pow(1-dist,settings2.z);
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fbSample=lerp(fbSample,bloom,(1-vig)*settings2.w);
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fbSample=lerp(bloom,fbSample,settings.x+settings.w*fbSample.a*settings2.w);
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bloom.xyz=min(bloom.xyz,1.0);
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float lum=.3*bloom.x+.59*bloom.y+.11*bloom.z;
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lum=min(1.0,lum);
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float4 c_out=(fbSample)+settings.z*pow(lum,settings2.x)*bloom;
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c_out.xyz*=tmscale;
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return FinalOutput( c_out, 0, PIXEL_FOG_TYPE_NONE, TONEMAP_SCALE_NONE );
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}
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