2 Copyright (C) 2013-2015 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 "raw_convert.h"
25 #include <dcp/chromaticity.h>
26 #include <dcp/colour_matrix.h>
27 #include <dcp/gamma_transfer_function.h>
28 #include <dcp/modified_gamma_transfer_function.h>
29 #include <libcxml/cxml.h>
30 #include <libxml++/libxml++.h>
31 #include <boost/foreach.hpp>
40 using boost::shared_ptr;
41 using boost::optional;
42 using boost::dynamic_pointer_cast;
44 vector<PresetColourConversion> PresetColourConversion::_presets;
46 ColourConversion::ColourConversion ()
47 : dcp::ColourConversion (dcp::ColourConversion::srgb_to_xyz ())
52 ColourConversion::ColourConversion (dcp::ColourConversion conversion_)
53 : dcp::ColourConversion (conversion_)
58 ColourConversion::ColourConversion (cxml::NodePtr node, int version)
60 shared_ptr<dcp::TransferFunction> in;
66 cxml::ConstNodePtr in_node = node->node_child ("InputTransferFunction");
67 string in_type = in_node->string_child ("Type");
68 if (in_type == "Gamma") {
69 _in.reset (new dcp::GammaTransferFunction (in_node->number_child<double> ("Gamma")));
70 } else if (in_type == "ModifiedGamma") {
71 _in.reset (new dcp::ModifiedGammaTransferFunction (
72 in_node->number_child<double> ("Power"),
73 in_node->number_child<double> ("Threshold"),
74 in_node->number_child<double> ("A"),
75 in_node->number_child<double> ("B")
83 if (node->bool_child ("InputGammaLinearised")) {
84 _in.reset (new dcp::ModifiedGammaTransferFunction (node->number_child<float> ("InputGamma"), 0.04045, 0.055, 12.92));
86 _in.reset (new dcp::GammaTransferFunction (node->number_child<float> ("InputGamma")));
90 _yuv_to_rgb = static_cast<dcp::YUVToRGB> (node->optional_number_child<int>("YUVToRGB").get_value_or (dcp::YUV_TO_RGB_REC601));
92 list<cxml::NodePtr> m = node->node_children ("Matrix");
94 /* Read in old <Matrix> nodes and convert them to chromaticities */
95 boost::numeric::ublas::matrix<double> C (3, 3);
96 for (list<cxml::NodePtr>::iterator i = m.begin(); i != m.end(); ++i) {
97 int const ti = (*i)->number_attribute<int> ("i");
98 int const tj = (*i)->number_attribute<int> ("j");
99 C(ti, tj) = raw_convert<double> ((*i)->content ());
102 double const rd = C(0, 0) + C(1, 0) + C(2, 0);
103 _red = dcp::Chromaticity (C(0, 0) / rd, C(1, 0) / rd);
104 double const gd = C(0, 1) + C(1, 1) + C(2, 1);
105 _green = dcp::Chromaticity (C(0, 1) / gd, C(1, 1) / gd);
106 double const bd = C(0, 2) + C(1, 2) + C(2, 2);
107 _blue = dcp::Chromaticity (C(0, 2) / bd, C(1, 2) / bd);
108 double const wd = C(0, 0) + C(0, 1) + C(0, 2) + C(1, 0) + C(1, 1) + C(1, 2) + C(2, 0) + C(2, 1) + C(2, 2);
109 _white = dcp::Chromaticity ((C(0, 0) + C(0, 1) + C(0, 2)) / wd, (C(1, 0) + C(1, 1) + C(1, 2)) / wd);
111 /* New-style chromaticities */
112 _red = dcp::Chromaticity (node->number_child<double> ("RedX"), node->number_child<double> ("RedY"));
113 _green = dcp::Chromaticity (node->number_child<double> ("GreenX"), node->number_child<double> ("GreenY"));
114 _blue = dcp::Chromaticity (node->number_child<double> ("BlueX"), node->number_child<double> ("BlueY"));
115 _white = dcp::Chromaticity (node->number_child<double> ("WhiteX"), node->number_child<double> ("WhiteY"));
116 if (node->optional_node_child ("AdjustedWhiteX")) {
117 _adjusted_white = dcp::Chromaticity (
118 node->number_child<double> ("AdjustedWhiteX"), node->number_child<double> ("AdjustedWhiteY")
123 _out.reset (new dcp::GammaTransferFunction (node->number_child<double> ("OutputGamma")));
126 boost::optional<ColourConversion>
127 ColourConversion::from_xml (cxml::NodePtr node, int version)
129 if (!node->optional_node_child ("InputTransferFunction")) {
130 return boost::optional<ColourConversion> ();
133 return ColourConversion (node, version);
137 ColourConversion::as_xml (xmlpp::Node* node) const
139 xmlpp::Node* in_node = node->add_child ("InputTransferFunction");
140 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
141 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
142 in_node->add_child("Type")->add_child_text ("Gamma");
143 in_node->add_child("Gamma")->add_child_text (raw_convert<string> (tf->gamma ()));
144 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
145 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
146 in_node->add_child("Type")->add_child_text ("ModifiedGamma");
147 in_node->add_child("Power")->add_child_text (raw_convert<string> (tf->power ()));
148 in_node->add_child("Threshold")->add_child_text (raw_convert<string> (tf->threshold ()));
149 in_node->add_child("A")->add_child_text (raw_convert<string> (tf->A ()));
150 in_node->add_child("B")->add_child_text (raw_convert<string> (tf->B ()));
153 node->add_child("YUVToRGB")->add_child_text (raw_convert<string> (_yuv_to_rgb));
154 node->add_child("RedX")->add_child_text (raw_convert<string> (_red.x));
155 node->add_child("RedY")->add_child_text (raw_convert<string> (_red.y));
156 node->add_child("GreenX")->add_child_text (raw_convert<string> (_green.x));
157 node->add_child("GreenY")->add_child_text (raw_convert<string> (_green.y));
158 node->add_child("BlueX")->add_child_text (raw_convert<string> (_blue.x));
159 node->add_child("BlueY")->add_child_text (raw_convert<string> (_blue.y));
160 node->add_child("WhiteX")->add_child_text (raw_convert<string> (_white.x));
161 node->add_child("WhiteY")->add_child_text (raw_convert<string> (_white.y));
162 if (_adjusted_white) {
163 node->add_child("AdjustedWhiteX")->add_child_text (raw_convert<string> (_adjusted_white.get().x));
164 node->add_child("AdjustedWhiteY")->add_child_text (raw_convert<string> (_adjusted_white.get().y));
167 node->add_child("OutputGamma")->add_child_text (raw_convert<string> (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out)->gamma ()));
171 ColourConversion::preset () const
173 vector<PresetColourConversion> presets = PresetColourConversion::all ();
175 while (i < presets.size() && presets[i].conversion != *this) {
179 if (i >= presets.size ()) {
180 return optional<size_t> ();
187 ColourConversion::identifier () const
189 MD5Digester digester;
191 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
192 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
193 digester.add (tf->gamma ());
194 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
195 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
196 digester.add (tf->power ());
197 digester.add (tf->threshold ());
198 digester.add (tf->A ());
199 digester.add (tf->B ());
202 digester.add (_red.x);
203 digester.add (_red.y);
204 digester.add (_green.x);
205 digester.add (_green.y);
206 digester.add (_blue.x);
207 digester.add (_blue.y);
208 digester.add (_white.x);
209 digester.add (_white.y);
211 if (_adjusted_white) {
212 digester.add (_adjusted_white.get().x);
213 digester.add (_adjusted_white.get().y);
216 digester.add (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out)->gamma ());
218 return digester.get ();
221 PresetColourConversion::PresetColourConversion ()
222 : name (_("Untitled"))
227 PresetColourConversion::PresetColourConversion (string n, string i, dcp::ColourConversion conversion_)
228 : conversion (conversion_)
235 PresetColourConversion::PresetColourConversion (cxml::NodePtr node, int version)
236 : conversion (node, version)
237 , name (node->string_child ("Name"))
243 operator== (ColourConversion const & a, ColourConversion const & b)
245 return a.about_equal (b, 1e-6);
249 operator!= (ColourConversion const & a, ColourConversion const & b)
255 operator== (PresetColourConversion const & a, PresetColourConversion const & b)
257 return a.name == b.name && a.conversion == b.conversion;
261 PresetColourConversion::setup_colour_conversion_presets ()
263 _presets.push_back (PresetColourConversion (_("sRGB"), "srgb", dcp::ColourConversion::srgb_to_xyz ()));
264 _presets.push_back (PresetColourConversion (_("Rec. 601"), "rec601", dcp::ColourConversion::rec601_to_xyz ()));
265 _presets.push_back (PresetColourConversion (_("Rec. 709"), "rec709", dcp::ColourConversion::rec709_to_xyz ()));
266 _presets.push_back (PresetColourConversion (_("P3"), "p3", dcp::ColourConversion::p3_to_xyz ()));
269 PresetColourConversion
270 PresetColourConversion::from_id (string s)
272 BOOST_FOREACH (PresetColourConversion const& i, _presets) {
278 DCPOMATIC_ASSERT (false);