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/*
Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cmath>
#include "gamma_lut.h"
#include "lut_cache.h"
using namespace libdcp;
LUTCache<GammaLUT> GammaLUT::cache;
GammaLUT::GammaLUT(int bits, float gamma)
: LUT (bits, gamma)
{
int const bit_length = pow(2, bits);
for (int i = 0; i < bit_length; ++i) {
_lut[i] = pow(float(i) / (bit_length - 1), gamma);
}
}
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