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.
21 #include "colour_conversion.h"
23 #include "md5_digester.h"
24 #include <dcp/colour_matrix.h>
25 #include <dcp/raw_convert.h>
26 #include <dcp/gamma_transfer_function.h>
27 #include <dcp/modified_gamma_transfer_function.h>
28 #include <libcxml/cxml.h>
29 #include <libxml++/libxml++.h>
37 using boost::shared_ptr;
38 using boost::optional;
39 using boost::dynamic_pointer_cast;
40 using dcp::raw_convert;
42 ColourConversion::ColourConversion ()
43 : dcp::ColourConversion (dcp::ColourConversion::srgb_to_xyz ())
48 ColourConversion::ColourConversion (dcp::ColourConversion conversion_)
49 : dcp::ColourConversion (conversion_)
54 ColourConversion::ColourConversion (cxml::NodePtr node, int version)
56 shared_ptr<dcp::TransferFunction> in;
62 cxml::ConstNodePtr in_node = node->node_child ("InputTransferFunction");
63 string in_type = in_node->string_child ("Type");
64 if (in_type == "Gamma") {
65 _in.reset (new dcp::GammaTransferFunction (false, in_node->number_child<double> ("Gamma")));
66 } else if (in_type == "ModifiedGamma") {
67 _in.reset (new dcp::ModifiedGammaTransferFunction (
69 in_node->number_child<double> ("Power"),
70 in_node->number_child<double> ("Threshold"),
71 in_node->number_child<double> ("A"),
72 in_node->number_child<double> ("B")
80 if (node->bool_child ("InputGammaLinearised")) {
81 _in.reset (new dcp::ModifiedGammaTransferFunction (false, node->number_child<float> ("InputGamma"), 0.04045, 0.055, 12.92));
83 _in.reset (new dcp::GammaTransferFunction (false, node->number_child<float> ("InputGamma")));
87 list<cxml::NodePtr> m = node->node_children ("Matrix");
88 for (list<cxml::NodePtr>::iterator i = m.begin(); i != m.end(); ++i) {
89 int const ti = (*i)->number_attribute<int> ("i");
90 int const tj = (*i)->number_attribute<int> ("j");
91 _matrix(ti, tj) = raw_convert<double> ((*i)->content ());
94 _out.reset (new dcp::GammaTransferFunction (true, node->number_child<double> ("OutputGamma")));
97 boost::optional<ColourConversion>
98 ColourConversion::from_xml (cxml::NodePtr node, int version)
100 if (!node->optional_node_child ("InputTransferFunction")) {
101 return boost::optional<ColourConversion> ();
104 return ColourConversion (node, version);
108 ColourConversion::as_xml (xmlpp::Node* node) const
110 xmlpp::Node* in_node = node->add_child ("InputTransferFunction");
111 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
112 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
113 in_node->add_child("Type")->add_child_text ("Gamma");
114 in_node->add_child("Gamma")->add_child_text (raw_convert<string> (tf->gamma ()));
115 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
116 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
117 in_node->add_child("Type")->add_child_text ("ModifiedGamma");
118 in_node->add_child("Power")->add_child_text (raw_convert<string> (tf->power ()));
119 in_node->add_child("Threshold")->add_child_text (raw_convert<string> (tf->threshold ()));
120 in_node->add_child("A")->add_child_text (raw_convert<string> (tf->A ()));
121 in_node->add_child("B")->add_child_text (raw_convert<string> (tf->B ()));
124 boost::numeric::ublas::matrix<double> matrix = _matrix;
125 for (int i = 0; i < 3; ++i) {
126 for (int j = 0; j < 3; ++j) {
127 xmlpp::Element* m = node->add_child("Matrix");
128 m->set_attribute ("i", raw_convert<string> (i));
129 m->set_attribute ("j", raw_convert<string> (j));
130 m->add_child_text (raw_convert<string> (matrix (i, j)));
134 node->add_child("OutputGamma")->add_child_text (raw_convert<string> (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out)->gamma ()));
138 ColourConversion::preset () const
140 vector<PresetColourConversion> presets = Config::instance()->colour_conversions ();
142 while (i < presets.size() && (presets[i].conversion != *this)) {
146 if (i >= presets.size ()) {
147 return optional<size_t> ();
154 ColourConversion::identifier () const
156 MD5Digester digester;
158 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
159 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
160 digester.add (tf->gamma ());
161 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
162 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
163 digester.add (tf->power ());
164 digester.add (tf->threshold ());
165 digester.add (tf->A ());
166 digester.add (tf->B ());
169 boost::numeric::ublas::matrix<double> matrix = _matrix;
170 for (int i = 0; i < 3; ++i) {
171 for (int j = 0; j < 3; ++j) {
172 digester.add (matrix (i, j));
176 digester.add (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out)->gamma ());
178 return digester.get ();
181 PresetColourConversion::PresetColourConversion ()
182 : name (_("Untitled"))
187 PresetColourConversion::PresetColourConversion (string n, dcp::ColourConversion conversion_)
189 , conversion (conversion_)
194 PresetColourConversion::PresetColourConversion (cxml::NodePtr node, int version)
195 : conversion (node, version)
196 , name (node->string_child ("Name"))
202 PresetColourConversion::as_xml (xmlpp::Node* node) const
204 conversion.as_xml (node);
205 node->add_child("Name")->add_child_text (name);
209 operator== (ColourConversion const & a, ColourConversion const & b)
211 return a.about_equal (b, 1e-6);
215 operator!= (ColourConversion const & a, ColourConversion const & b)