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// Tone mapping pass
#include "hdr.cg"
half4 main(fragin In,
uniform samplerRECT sceneTex : TEXUNIT0,
uniform samplerRECT blurTex : TEXUNIT1,
uniform sampler1D gammaTex : TEXUNIT2,
uniform samplerRECT vignetteTex : TEXUNIT3,
uniform float blurAmount,
uniform float4 windowSize,
uniform float exposure
) : COLOR
{
// sum original and blurred image
half3 c = lerp(texRECT(sceneTex, In.tex0.xy), texRECT_bilinear(blurTex, In.tex1.xy), blurAmount).xyz;
// exposure
c = c * half(exposure);
// vignette effect (makes brightness drop off with distance from center)
// vignette(c, In.wpos, windowSize.xy, windowSize.zw);
c = c * texRECT(vignetteTex, In.tex0.xy).rgb;
// gamma correction
#if 0
// use math
c = pow(c, 1.0 / 2.2);
#else
// use lut
c.r = h1tex1D(gammaTex, c.r);
c.g = h1tex1D(gammaTex, c.g);
c.b = h1tex1D(gammaTex, c.b);
#endif
return half4(c, 1.0);
}
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