31 lines
958 B
GLSL
31 lines
958 B
GLSL
// https://github.com/ampas/aces-core/blob/dev/lib/Lib.Academy.DisplayEncoding.ctl
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// moncurve with gamma of 2.4 and offset of 0.055 matches the EOTF found in IEC 61966-2-1:1999 (sRGB)
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//!HOOK OUTPUT
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//!BIND HOOKED
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//!DESC transfer function (srgb)
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const float gamma = 2.4;
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const float offset = 0.055;
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float monitor_curve_eotf_inv(float y) {
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const float yb = pow(offset * gamma / ((gamma - 1.0) * (1.0 + offset)), gamma);
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const float rs = pow((gamma - 1.0) / offset, gamma - 1.0) * pow((1.0 + offset) / gamma, gamma);
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return y >= yb ? (1.0 + offset) * pow(y, 1.0 / gamma) - offset : y * rs;
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}
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vec3 monitor_curve_eotf_inv(vec3 color) {
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return vec3(
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monitor_curve_eotf_inv(color.r),
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monitor_curve_eotf_inv(color.g),
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monitor_curve_eotf_inv(color.b)
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);
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}
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vec4 hook() {
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vec4 color = HOOKED_tex(HOOKED_pos);
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color.rgb = monitor_curve_eotf_inv(color.rgb);
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return color;
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}
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