2012-01-24 16:32:31 +00:00
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/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "stdosl.h"
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shader node_brightness(
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2012-12-11 16:06:03 +00:00
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color ColorIn = 0.8,
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2012-11-20 17:40:21 +00:00
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float Bright = 0.0,
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2012-01-24 16:32:31 +00:00
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float Contrast = 0.0,
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2012-12-11 16:06:03 +00:00
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output color ColorOut = 0.8)
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2012-01-24 16:32:31 +00:00
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{
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2012-11-20 17:40:21 +00:00
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float a = 1.0 + Contrast;
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float b = Bright - Contrast*0.5;
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2012-01-24 16:32:31 +00:00
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2012-11-20 17:40:21 +00:00
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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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2012-01-24 16:32:31 +00:00
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}
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