mirror of
https://github.com/tanema/light_world.lua.git
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25 lines
601 B
GLSL
25 lines
601 B
GLSL
extern float exposure = 0.7;
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extern float brightness = 1.0;
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extern vec3 lumacomponents = vec3(1.0, 1.0, 1.0);
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// luma
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//const vec3 lumcoeff = vec3(0.299,0.587,0.114);
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const vec3 lumcoeff = vec3(0.212671, 0.715160, 0.072169);
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vec4 effect(vec4 vcolor, Image texture, vec2 texcoord, vec2 pixel_coords)
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{
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vec4 input0 = Texel(texture, texcoord);
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//exposure knee
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input0 *= (exp2(input0)*vec4(exposure));
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vec4 lumacomponents = vec4(lumcoeff * lumacomponents, 0.0 );
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float luminance = dot(input0,lumacomponents);
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vec4 luma = vec4(luminance);
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return vec4(luma.rgb * brightness, 1.0);
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}
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