28 lines
803 B
Plaintext
28 lines
803 B
Plaintext
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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#include "node_ramp_util.h"
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#include "stdcycles.h"
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shader node_rgb_curves(color ramp[] = {0.0},
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float min_x = 0.0,
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float max_x = 1.0,
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int extrapolate = 1,
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color ColorIn = 0.0,
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float Fac = 0.0,
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output color ColorOut = 0.0)
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{
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color c = (ColorIn - color(min_x, min_x, min_x)) / (max_x - min_x);
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color r = rgb_ramp_lookup(ramp, c[0], 1, extrapolate);
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color g = rgb_ramp_lookup(ramp, c[1], 1, extrapolate);
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color b = rgb_ramp_lookup(ramp, c[2], 1, extrapolate);
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ColorOut[0] = r[0];
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ColorOut[1] = g[1];
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ColorOut[2] = b[2];
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ColorOut = mix(ColorIn, ColorOut, Fac);
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}
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