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/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "stdosl.h"
shader node_brightness(
color ColorIn = 0.8,
float Bright = 0.0,
float Contrast = 0.0,
output color ColorOut = 0.8)
{
float a = 1.0 + Contrast;
float b = Bright - Contrast * 0.5;
ColorOut[0] = max(a * ColorIn[0] + b, 0.0);
ColorOut[1] = max(a * ColorIn[1] + b, 0.0);
ColorOut[2] = max(a * ColorIn[2] + b, 0.0);
}
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