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source: data/branches/Shader_HS18/programs/Cg/BrightBloom2_ps20.cg @ 12202

Last change on this file since 12202 was 12115, checked in by wiesep, 6 years ago

Changed folder structure, deletet some unused files and cleaned up code

File size: 588 bytes
Line 
1//-------------------------------
2//BrightBloom_ps20.cg
3// High-pass filter for obtaining lumminance
4// We use an aproximation formula that is pretty fast:
5//   f(x) = ( -3 * ( x - 1 )^2 + 1 ) * 2
6//   Color += f(Color)
7//-------------------------------
8
9float4 main(float2 texCoord: TEXCOORD0,
10                uniform sampler RT: register(s0)
11                ) : COLOR {
12        float4 tex = tex2D(RT,   texCoord);
13
14        tex -= 1;
15        float4 bright4= -6 * tex * tex + 2; //float4 bright4= ( -3 * tex * tex + 1 ) * 2;
16        float bright = dot( bright4, float4( 0.333333, 0.333333, 0.333333, 0) );
17        tex += bright + 0.6;
18
19        return tex;
20}
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