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 <libxml++/libxml++.h>
21 #include <dcp/colour_matrix.h>
22 #include <dcp/raw_convert.h>
23 #include <libcxml/cxml.h>
25 #include "colour_conversion.h"
27 #include "md5_digester.h"
33 using std::stringstream;
36 using boost::shared_ptr;
37 using boost::optional;
38 using dcp::raw_convert;
40 ColourConversion::ColourConversion ()
42 , input_gamma_linearised (true)
46 for (int i = 0; i < 3; ++i) {
47 for (int j = 0; j < 3; ++j) {
48 matrix (i, j) = dcp::colour_matrix::srgb_to_xyz[i][j];
53 ColourConversion::ColourConversion (double i, bool il, double const m[3][3], double o)
55 , input_gamma_linearised (il)
59 for (int i = 0; i < 3; ++i) {
60 for (int j = 0; j < 3; ++j) {
61 matrix (i, j) = m[i][j];
66 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) = raw_convert<double> ((*i)->content ());
85 output_gamma = node->number_child<double> ("OutputGamma");
89 ColourConversion::as_xml (xmlpp::Node* node) const
91 node->add_child("InputGamma")->add_child_text (raw_convert<string> (input_gamma));
92 node->add_child("InputGammaLinearised")->add_child_text (input_gamma_linearised ? "1" : "0");
94 for (int i = 0; i < 3; ++i) {
95 for (int j = 0; j < 3; ++j) {
96 xmlpp::Element* m = node->add_child("Matrix");
97 m->set_attribute ("i", raw_convert<string> (i));
98 m->set_attribute ("j", raw_convert<string> (j));
99 m->add_child_text (raw_convert<string> (matrix (i, j)));
103 node->add_child("OutputGamma")->add_child_text (raw_convert<string> (output_gamma));
107 ColourConversion::preset () const
109 vector<PresetColourConversion> presets = Config::instance()->colour_conversions ();
111 while (i < presets.size() && (presets[i].conversion != *this)) {
115 if (i >= presets.size ()) {
116 return optional<size_t> ();
123 ColourConversion::identifier () const
125 MD5Digester digester;
127 digester.add (input_gamma);
128 digester.add (input_gamma_linearised);
129 for (int i = 0; i < 3; ++i) {
130 for (int j = 0; j < 3; ++j) {
131 digester.add (matrix (i, j));
134 digester.add (output_gamma);
136 return digester.get ();
139 PresetColourConversion::PresetColourConversion ()
140 : name (_("Untitled"))
145 PresetColourConversion::PresetColourConversion (string n, double i, bool il, double const m[3][3], double o)
147 , conversion (i, il, m, o)
152 PresetColourConversion::PresetColourConversion (cxml::NodePtr node)
155 name = node->string_child ("Name");
159 PresetColourConversion::as_xml (xmlpp::Node* node) const
161 conversion.as_xml (node);
162 node->add_child("Name")->add_child_text (name);
166 about_equal (double a, double b)
168 static const double eps = 1e-6;
169 return fabs (a - b) < eps;
173 operator== (ColourConversion const & a, ColourConversion const & b)
176 !about_equal (a.input_gamma, b.input_gamma) ||
177 a.input_gamma_linearised != b.input_gamma_linearised ||
178 !about_equal (a.output_gamma, b.output_gamma)) {
182 for (int i = 0; i < 3; ++i) {
183 for (int j = 0; j < 3; ++j) {
184 if (!about_equal (a.matrix (i, j), b.matrix (i, j))) {
194 operator!= (ColourConversion const & a, ColourConversion const & b)