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/*
Copyright (C) 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 <boost/test/unit_test.hpp>
#include "opendcp_lut.h"
#include "opendcp_lut.cc"
#include "srgb_linearised_gamma_lut.h"
#include "rec709_linearised_gamma_lut.h"
#include "gamma_lut.h"
/* Check that some of our LUTs match the ones from OpenDCP that
DVD-o-matic uses / once used.
*/
BOOST_AUTO_TEST_CASE (lut_test)
{
libdcp::SRGBLinearisedGammaLUT lut_in_srgb (12, 2.4);
for (int i = 0; i < 4096; ++i) {
/* Hmm; 1% isn't exactly great... */
BOOST_CHECK_CLOSE (opendcp::lut_in[0][i], lut_in_srgb.lut()[i], 1);
}
libdcp::Rec709LinearisedGammaLUT lut_in_rec709 (12, 1 / 0.45);
for (int i = 0; i < 4096; ++i) {
/* Hmm; 1% isn't exactly great... */
BOOST_CHECK_CLOSE (opendcp::lut_in[1][i], lut_in_rec709.lut()[i], 1);
}
libdcp::GammaLUT lut_out (16, 1 / 2.6);
for (int i = 0; i < 65536; ++i) {
BOOST_CHECK_CLOSE (opendcp::lut_out[0][i], lut_out.lut()[i] * 4096, 1);
}
}
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