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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.
*/
#ifndef __UTIL_COLOR_H__
#define __UTIL_COLOR_H__
#include "util_math.h"
#include "util_types.h"
CCL_NAMESPACE_BEGIN
__device float color_srgb_to_scene_linear(float c)
{
if(c < 0.04045f)
return (c < 0.0f)? 0.0f: c * (1.0f/12.92f);
else
return pow((c + 0.055f)*(1.0f/1.055f), 2.4f);
}
__device float color_scene_linear_to_srgb(float c)
{
if(c < 0.0031308f)
return (c < 0.0f)? 0.0f: c * 12.92f;
else
return 1.055f * pow(c, 1.0f/2.4f) - 0.055f;
}
CCL_NAMESPACE_END
#endif /* __UTIL_COLOR_H__ */
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