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"
33 using boost::shared_ptr;
34 using boost::lexical_cast;
35 using boost::optional;
37 ColourConversion::ColourConversion ()
39 , input_gamma_linearised (true)
43 for (int i = 0; i < 3; ++i) {
44 for (int j = 0; j < 3; ++j) {
45 matrix (i, j) = libdcp::colour_matrix::xyz_to_rgb[i][j];
50 ColourConversion::ColourConversion (double i, bool il, double const m[3][3], double o)
52 , input_gamma_linearised (il)
56 for (int i = 0; i < 3; ++i) {
57 for (int j = 0; j < 3; ++j) {
58 matrix (i, j) = m[i][j];
63 ColourConversion::ColourConversion (shared_ptr<cxml::Node> node)
66 input_gamma = node->number_child<double> ("InputGamma");
67 input_gamma_linearised = node->bool_child ("InputGammaLinearised");
69 for (int i = 0; i < 3; ++i) {
70 for (int j = 0; j < 3; ++j) {
75 list<shared_ptr<cxml::Node> > m = node->node_children ("Matrix");
76 for (list<shared_ptr<cxml::Node> >::iterator i = m.begin(); i != m.end(); ++i) {
77 int const ti = (*i)->number_attribute<int> ("i");
78 int const tj = (*i)->number_attribute<int> ("j");
79 matrix(ti, tj) = lexical_cast<double> ((*i)->content ());
82 output_gamma = node->number_child<double> ("OutputGamma");
86 ColourConversion::as_xml (xmlpp::Node* node) const
88 node->add_child("InputGamma")->add_child_text (lexical_cast<string> (input_gamma));
89 node->add_child("InputGammaLinearised")->add_child_text (input_gamma_linearised ? "1" : "0");
91 for (int i = 0; i < 3; ++i) {
92 for (int j = 0; j < 3; ++j) {
93 xmlpp::Element* m = node->add_child("Matrix");
94 m->set_attribute ("i", lexical_cast<string> (i));
95 m->set_attribute ("j", lexical_cast<string> (j));
96 m->add_child_text (lexical_cast<string> (matrix (i, j)));
100 node->add_child("OutputGamma")->add_child_text (lexical_cast<string> (output_gamma));
104 ColourConversion::preset () const
106 vector<PresetColourConversion> presets = Config::instance()->colour_conversions ();
108 while (i < presets.size() && (presets[i].conversion != *this)) {
112 if (i >= presets.size ()) {
113 return optional<size_t> ();
119 PresetColourConversion::PresetColourConversion ()
120 : name (_("Untitled"))
125 PresetColourConversion::PresetColourConversion (string n, double i, bool il, double const m[3][3], double o)
127 , conversion (i, il, m, o)
132 PresetColourConversion::PresetColourConversion (shared_ptr<cxml::Node> node)
135 name = node->string_child ("Name");
139 PresetColourConversion::as_xml (xmlpp::Node* node) const
141 conversion.as_xml (node);
142 node->add_child("Name")->add_child_text (name);
146 about_equal (double a, double b)
148 static const double eps = 1e-6;
149 return fabs (a - b) < eps;
153 operator== (ColourConversion const & a, ColourConversion const & b)
156 !about_equal (a.input_gamma, b.input_gamma) ||
157 a.input_gamma_linearised != b.input_gamma_linearised ||
158 !about_equal (a.output_gamma, b.output_gamma)) {
162 for (int i = 0; i < 3; ++i) {
163 for (int j = 0; j < 3; ++j) {
164 if (!about_equal (a.matrix (i, j), b.matrix (i, j))) {
174 operator!= (ColourConversion const & a, ColourConversion const & b)