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)
56 shared_ptr<dcp::TransferFunction> in;
58 cxml::ConstNodePtr in_node = node->node_child ("InputTransferFunction");
59 string in_type = in_node->string_child ("Type");
60 if (in_type == "Gamma") {
61 _in.reset (new dcp::GammaTransferFunction (false, in_node->number_child<double> ("Gamma")));
62 } else if (in_type == "ModifiedGamma") {
63 _in.reset (new dcp::ModifiedGammaTransferFunction (
65 in_node->number_child<double> ("Power"),
66 in_node->number_child<double> ("Threshold"),
67 in_node->number_child<double> ("A"),
68 in_node->number_child<double> ("B")
72 list<cxml::NodePtr> m = node->node_children ("Matrix");
73 for (list<cxml::NodePtr>::iterator i = m.begin(); i != m.end(); ++i) {
74 int const ti = (*i)->number_attribute<int> ("i");
75 int const tj = (*i)->number_attribute<int> ("j");
76 _matrix(ti, tj) = raw_convert<double> ((*i)->content ());
79 _out.reset (new dcp::GammaTransferFunction (true, node->number_child<double> ("OutputGamma")));
82 boost::optional<ColourConversion>
83 ColourConversion::from_xml (cxml::NodePtr node)
85 if (!node->optional_node_child ("InputTransferFunction")) {
86 return boost::optional<ColourConversion> ();
89 return ColourConversion (node);
93 ColourConversion::as_xml (xmlpp::Node* node) const
95 xmlpp::Node* in_node = node->add_child ("InputTransferFunction");
96 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
97 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
98 in_node->add_child("Type")->add_child_text ("Gamma");
99 in_node->add_child("Gamma")->add_child_text (raw_convert<string> (tf->gamma ()));
100 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
101 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
102 in_node->add_child("Type")->add_child_text ("ModifiedGamma");
103 in_node->add_child("Power")->add_child_text (raw_convert<string> (tf->power ()));
104 in_node->add_child("Threshold")->add_child_text (raw_convert<string> (tf->threshold ()));
105 in_node->add_child("A")->add_child_text (raw_convert<string> (tf->A ()));
106 in_node->add_child("B")->add_child_text (raw_convert<string> (tf->B ()));
109 boost::numeric::ublas::matrix<double> matrix = _matrix;
110 for (int i = 0; i < 3; ++i) {
111 for (int j = 0; j < 3; ++j) {
112 xmlpp::Element* m = node->add_child("Matrix");
113 m->set_attribute ("i", raw_convert<string> (i));
114 m->set_attribute ("j", raw_convert<string> (j));
115 m->add_child_text (raw_convert<string> (matrix (i, j)));
119 node->add_child("OutputGamma")->add_child_text (raw_convert<string> (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out)->gamma ()));
123 ColourConversion::preset () const
125 vector<PresetColourConversion> presets = Config::instance()->colour_conversions ();
127 while (i < presets.size() && (presets[i].conversion != *this)) {
131 if (i >= presets.size ()) {
132 return optional<size_t> ();
139 ColourConversion::identifier () const
141 MD5Digester digester;
143 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
144 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
145 digester.add (tf->gamma ());
146 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
147 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
148 digester.add (tf->power ());
149 digester.add (tf->threshold ());
150 digester.add (tf->A ());
151 digester.add (tf->B ());
154 boost::numeric::ublas::matrix<double> matrix = _matrix;
155 for (int i = 0; i < 3; ++i) {
156 for (int j = 0; j < 3; ++j) {
157 digester.add (matrix (i, j));
161 digester.add (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out)->gamma ());
163 return digester.get ();
166 PresetColourConversion::PresetColourConversion ()
167 : name (_("Untitled"))
172 PresetColourConversion::PresetColourConversion (string n, dcp::ColourConversion conversion_)
174 , conversion (conversion_)
179 PresetColourConversion::PresetColourConversion (cxml::NodePtr node)
182 name = node->string_child ("Name");
186 PresetColourConversion::as_xml (xmlpp::Node* node) const
188 conversion.as_xml (node);
189 node->add_child("Name")->add_child_text (name);
193 operator== (ColourConversion const & a, ColourConversion const & b)
195 return a.about_equal (b, 1e-6);
199 operator!= (ColourConversion const & a, ColourConversion const & b)