35 lines
1,020 B
GLSL
35 lines
1,020 B
GLSL
/*
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Math color grading from MariENB
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(C)2012-2022 Marisa the Magician
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*/
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#define luminance(x) dot(x,vec3(0.2126,0.7152,0.0722))
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vec3 rgb2hsv( vec3 c )
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{
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vec4 K = vec4(0.0,-1.0/3.0,2.0/3.0,-1.0);
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vec4 p = (c.g<c.b)?vec4(c.bg,K.wz):vec4(c.gb,K.xy);
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vec4 q = (c.r<p.x)?vec4(p.xyw,c.r):vec4(c.r,p.yzx);
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float d = q.x-min(q.w,q.y);
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float e = 1.0e-10;
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return vec3(abs(q.z+(q.w-q.y)/(6.0*d+e)),d/(q.x+e),q.x);
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}
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vec3 hsv2rgb( vec3 c )
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{
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vec4 K = vec4(1.0,2.0/3.0,1.0/3.0,3.0);
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vec3 p = abs(fract(c.xxx+K.xyz)*6.0-K.www);
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return c.z*mix(K.xxx,clamp(p-K.xxx,0.0,1.0),c.y);
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}
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void main()
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{
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vec4 res = texture(InputTexture,TexCoord);
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res.rgb = pow(max(res.rgb,0.0),gradepow)*grademul;
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vec3 hsv = rgb2hsv(res.rgb);
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hsv.y = clamp(pow(max(hsv.y,0.0),gradesatpow)*gradesatmul,0.0,1.0);
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hsv.z = pow(max(hsv.z,0.0),gradevalpow)*gradevalmul;
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res.rgb = hsv2rgb(hsv);
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float tonev = luminance(res.rgb);
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vec3 tonecolor = gradecol*tonev;
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res.rgb = res.rgb*(1.0-gradecolfact)+tonecolor*gradecolfact;
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FragColor = res;
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}
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