2 Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 libdcp is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
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31 files in the program, then also delete it here.
34 /** @file src/colour_conversion.h
35 * @brief ColourConversion class.
38 #ifndef DCP_COLOUR_CONVERSION_H
39 #define DCP_COLOUR_CONVERSION_H
41 #include "chromaticity.h"
42 #include <boost/shared_ptr.hpp>
43 #if BOOST_VERSION >= 106400
44 #include <boost/serialization/array_wrapper.hpp>
46 #include <boost/numeric/ublas/matrix.hpp>
47 #include <boost/optional.hpp>
51 class TransferFunction;
59 /** @class ColourConversion
60 * @brief A representation of all the parameters involved the colourspace conversion
61 * of a YUV image to XYZ (via RGB).
63 class ColourConversion
67 : _yuv_to_rgb (YUV_TO_RGB_REC601)
71 boost::shared_ptr<const TransferFunction> in,
77 boost::optional<Chromaticity> adjusted_white,
78 boost::shared_ptr<const TransferFunction> out
81 boost::shared_ptr<const TransferFunction> in () const {
85 YUVToRGB yuv_to_rgb () const {
89 Chromaticity red () const {
93 Chromaticity green () const {
97 Chromaticity blue () const {
101 Chromaticity white () const {
105 boost::optional<Chromaticity> adjusted_white () const {
106 return _adjusted_white;
109 boost::shared_ptr<const TransferFunction> out () const {
113 void set_in (boost::shared_ptr<const TransferFunction> f) {
117 void set_yuv_to_rgb (YUVToRGB y) {
121 void set_red (Chromaticity red) {
125 void set_green (Chromaticity green) {
129 void set_blue (Chromaticity blue) {
133 void set_white (Chromaticity white) {
137 void set_adjusted_white (Chromaticity adjusted_white) {
138 _adjusted_white = adjusted_white;
141 void unset_adjusted_white () {
142 _adjusted_white = boost::optional<Chromaticity> ();
145 void set_out (boost::shared_ptr<const TransferFunction> f) {
149 bool about_equal (ColourConversion const & other, float epsilon) const;
151 boost::numeric::ublas::matrix<double> rgb_to_xyz () const;
152 boost::numeric::ublas::matrix<double> xyz_to_rgb () const;
153 boost::numeric::ublas::matrix<double> bradford () const;
155 static ColourConversion const & srgb_to_xyz ();
156 static ColourConversion const & rec601_to_xyz ();
157 static ColourConversion const & rec709_to_xyz ();
158 static ColourConversion const & p3_to_xyz ();
159 static ColourConversion const & rec1886_to_xyz ();
160 static ColourConversion const & rec2020_to_xyz ();
161 static ColourConversion const & s_gamut3_to_xyz ();
164 /** Input transfer function (probably a gamma function, or something similar) */
165 boost::shared_ptr<const TransferFunction> _in;
166 /** Conversion to use from YUV to RGB */
167 YUVToRGB _yuv_to_rgb;
172 /** White point that we are adjusting to using a Bradford matrix */
173 boost::optional<Chromaticity> _adjusted_white;
174 /** Output transfer function (probably an inverse gamma function, or something similar) */
175 boost::shared_ptr<const TransferFunction> _out;