From 028a6d7a5939b114472f16c3436a30f72165165f Mon Sep 17 00:00:00 2001 From: Carl Hetherington Date: Wed, 14 Dec 2016 16:14:02 +0000 Subject: Add tentative S-Gamut3/S-Log3 colourspace support. --- src/identity_transfer_function.cc | 63 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/identity_transfer_function.cc (limited to 'src/identity_transfer_function.cc') diff --git a/src/identity_transfer_function.cc b/src/identity_transfer_function.cc new file mode 100644 index 00000000..1edc61da --- /dev/null +++ b/src/identity_transfer_function.cc @@ -0,0 +1,63 @@ +/* + Copyright (C) 2016 Carl Hetherington + + This file is part of libdcp. + + libdcp 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. + + libdcp 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 libdcp. If not, see . + + In addition, as a special exception, the copyright holders give + permission to link the code of portions of this program with the + OpenSSL library under certain conditions as described in each + individual source file, and distribute linked combinations + including the two. + + You must obey the GNU General Public License in all respects + for all of the code used other than OpenSSL. If you modify + file(s) with this exception, you may extend this exception to your + version of the file(s), but you are not obligated to do so. If you + do not wish to do so, delete this exception statement from your + version. If you delete this exception statement from all source + files in the program, then also delete it here. +*/ + +/** @file src/identity_transfer_function.cc + * @brief IdentityTransferFunction class. + */ + +#include "identity_transfer_function.h" +#include + +using std::pow; +using boost::shared_ptr; +using boost::dynamic_pointer_cast; +using namespace dcp; + +double * +IdentityTransferFunction::make_lut (int bit_depth, bool) const +{ + int const bit_length = int(std::pow(2.0f, bit_depth)); + double* lut = new double[bit_length]; + for (int i = 0; i < bit_length; ++i) { + lut[i] = double(i) / (bit_length - 1); + } + + return lut; +} + +bool +IdentityTransferFunction::about_equal (shared_ptr other, double) const +{ + shared_ptr o = dynamic_pointer_cast (other); + return static_cast(o); +} -- cgit v1.2.3