33 lines
949 B
Plaintext
33 lines
949 B
Plaintext
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "stdosl.h"
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shader node_brightness(
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color ColorIn = 0.8,
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float Bright = 0.0,
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float Contrast = 0.0,
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output color ColorOut = 0.8)
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{
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float a = 1.0 + Contrast;
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float b = Bright - Contrast * 0.5;
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ColorOut[0] = max(a * ColorIn[0] + b, 0.0);
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ColorOut[1] = max(a * ColorIn[1] + b, 0.0);
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ColorOut[2] = max(a * ColorIn[2] + b, 0.0);
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}
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