mirror of https://github.com/ZDoom/gzdoom.git
24 lines
527 B
GLSL
24 lines
527 B
GLSL
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in vec2 TexCoord;
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out vec4 FragColor;
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uniform sampler2D InputTexture;
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uniform float InvGamma;
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uniform float Contrast;
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uniform float Brightness;
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uniform float Saturation;
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vec4 ApplyGamma(vec4 c)
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{
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vec3 valgray = (0.3 * c.r + 0.59 * c.g + 0.11 * c.b) * (1 - Saturation) + c.rgb * Saturation;
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vec3 val = valgray * Contrast - (Contrast - 1.0) * 0.5;
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val += Brightness * 0.5;
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val = pow(max(val, vec3(0.0)), vec3(InvGamma));
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return vec4(val, c.a);
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}
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void main()
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{
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FragColor = ApplyGamma(texture(InputTexture, TexCoord));
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}
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