32 lines
640 B
GLSL
32 lines
640 B
GLSL
// vert //
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void main(void) {
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gl_Position = qgl_ftransform();
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}
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// frag //
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uniform sampler2D tex_0, tex_sum;
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const vec3 luma = vec3(0.299, 0.587, 0.114);
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void main(void) {
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ivec2 tc = ivec2(gl_FragCoord.xy);
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vec4 src = texelFetch(tex_0, tc, 0);
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vec4 sum = texelFetch(tex_sum, ivec2(0,0), 0);
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vec3 res = src.rgb;
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float l = dot(res, luma);
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float g = 2.2/dot(sum.rgb, luma);
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res /= l;
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//res = log(res + vec3(2.)) - log(vec3(2.));
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//res = pow(res,vec3(1/2.2));
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//l = pow(l,1/2.2);
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l = 1 - exp(-l*g);
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//l /= 100;
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//res = pow(res,vec3(2.2));
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//l = pow(l,2.2);
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qgl_FragColor.rgb = res * l;
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//qgl_FragColor.rgb = sum.rgb*10;
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}
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