2 Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include <boost/lexical_cast.hpp>
21 #include <libxml++/libxml++.h>
22 #include <libdcp/colour_matrix.h>
23 #include <libcxml/cxml.h>
25 #include "colour_conversion.h"
34 using boost::shared_ptr;
35 using boost::lexical_cast;
36 using boost::optional;
38 ColourConversion::ColourConversion ()
40 , input_gamma_linearised (true)
44 for (int i = 0; i < 3; ++i) {
45 for (int j = 0; j < 3; ++j) {
46 matrix (i, j) = libdcp::colour_matrix::srgb_to_xyz[i][j];
51 ColourConversion::ColourConversion (double i, bool il, double const m[3][3], double o)
53 , input_gamma_linearised (il)
57 for (int i = 0; i < 3; ++i) {
58 for (int j = 0; j < 3; ++j) {
59 matrix (i, j) = m[i][j];
64 ColourConversion::ColourConversion (cxml::NodePtr node)
69 input_gamma = node->number_child<double> ("InputGamma");
70 input_gamma_linearised = node->bool_child ("InputGammaLinearised");
72 for (int i = 0; i < 3; ++i) {
73 for (int j = 0; j < 3; ++j) {
78 list<cxml::NodePtr> m = node->node_children ("Matrix");
79 for (list<cxml::NodePtr>::iterator i = m.begin(); i != m.end(); ++i) {
80 int const ti = (*i)->number_attribute<int> ("i");
81 int const tj = (*i)->number_attribute<int> ("j");
82 matrix(ti, tj) = lexical_cast<double> ((*i)->content ());
85 output_gamma = node->number_child<double> ("OutputGamma");
89 ColourConversion::as_xml (xmlpp::Node* node) const
93 node->add_child("InputGamma")->add_child_text (lexical_cast<string> (input_gamma));
94 node->add_child("InputGammaLinearised")->add_child_text (input_gamma_linearised ? "1" : "0");
96 for (int i = 0; i < 3; ++i) {
97 for (int j = 0; j < 3; ++j) {
98 xmlpp::Element* m = node->add_child("Matrix");
99 m->set_attribute ("i", lexical_cast<string> (i));
100 m->set_attribute ("j", lexical_cast<string> (j));
101 m->add_child_text (lexical_cast<string> (matrix (i, j)));
105 node->add_child("OutputGamma")->add_child_text (lexical_cast<string> (output_gamma));
109 ColourConversion::preset () const
111 vector<PresetColourConversion> presets = Config::instance()->colour_conversions ();
113 while (i < presets.size() && (presets[i].conversion != *this)) {
117 if (i >= presets.size ()) {
118 return optional<size_t> ();
125 ColourConversion::identifier () const
130 numbers[n++] = input_gamma;
131 numbers[n++] = input_gamma_linearised;
132 for (int i = 0; i < 3; ++i) {
133 for (int j = 0; j < 3; ++j) {
134 numbers[n++] = matrix (i, j);
137 numbers[n++] = output_gamma;
141 return md5_digest (numbers, 12 * sizeof (double));
144 PresetColourConversion::PresetColourConversion ()
145 : name (_("Untitled"))
150 PresetColourConversion::PresetColourConversion (string n, double i, bool il, double const m[3][3], double o)
152 , conversion (i, il, m, o)
157 PresetColourConversion::PresetColourConversion (cxml::NodePtr node)
160 name = node->string_child ("Name");
164 PresetColourConversion::as_xml (xmlpp::Node* node) const
166 conversion.as_xml (node);
167 node->add_child("Name")->add_child_text (name);
171 about_equal (double a, double b)
173 static const double eps = 1e-6;
174 return fabs (a - b) < eps;
178 operator== (ColourConversion const & a, ColourConversion const & b)
181 !about_equal (a.input_gamma, b.input_gamma) ||
182 a.input_gamma_linearised != b.input_gamma_linearised ||
183 !about_equal (a.output_gamma, b.output_gamma)) {
187 for (int i = 0; i < 3; ++i) {
188 for (int j = 0; j < 3; ++j) {
189 if (!about_equal (a.matrix (i, j), b.matrix (i, j))) {
199 operator!= (ColourConversion const & a, ColourConversion const & b)