2 Copyright (C) 2013-2020 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "colour_conversion.h"
26 #include <dcp/raw_convert.h>
27 #include <dcp/chromaticity.h>
28 #include <dcp/gamma_transfer_function.h>
29 #include <dcp/modified_gamma_transfer_function.h>
30 #include <dcp/identity_transfer_function.h>
31 #include <dcp/s_gamut3_transfer_function.h>
32 #include <libcxml/cxml.h>
33 DCPOMATIC_DISABLE_WARNINGS
34 #include <libxml++/libxml++.h>
35 DCPOMATIC_ENABLE_WARNINGS
44 using std::shared_ptr;
45 using boost::optional;
46 using std::dynamic_pointer_cast;
47 using dcp::raw_convert;
49 vector<PresetColourConversion> PresetColourConversion::_presets;
51 ColourConversion::ColourConversion ()
52 : dcp::ColourConversion (dcp::ColourConversion::srgb_to_xyz ())
57 ColourConversion::ColourConversion (dcp::ColourConversion conversion_)
58 : dcp::ColourConversion (conversion_)
63 ColourConversion::ColourConversion (cxml::NodePtr node, int version)
65 shared_ptr<dcp::TransferFunction> in;
71 cxml::ConstNodePtr in_node = node->node_child ("InputTransferFunction");
72 string in_type = in_node->string_child ("Type");
73 if (in_type == "Gamma") {
74 _in.reset (new dcp::GammaTransferFunction (in_node->number_child<double> ("Gamma")));
75 } else if (in_type == "ModifiedGamma") {
76 _in.reset (new dcp::ModifiedGammaTransferFunction (
77 in_node->number_child<double> ("Power"),
78 in_node->number_child<double> ("Threshold"),
79 in_node->number_child<double> ("A"),
80 in_node->number_child<double> ("B")
82 } else if (in_type == "SGamut3") {
83 _in.reset (new dcp::SGamut3TransferFunction ());
90 if (node->bool_child ("InputGammaLinearised")) {
91 _in.reset (new dcp::ModifiedGammaTransferFunction (node->number_child<double> ("InputGamma"), 0.04045, 0.055, 12.92));
93 _in.reset (new dcp::GammaTransferFunction (node->number_child<double> ("InputGamma")));
97 _yuv_to_rgb = static_cast<dcp::YUVToRGB> (node->optional_number_child<int>("YUVToRGB").get_value_or (dcp::YUV_TO_RGB_REC601));
99 list<cxml::NodePtr> m = node->node_children ("Matrix");
101 /* Read in old <Matrix> nodes and convert them to chromaticities */
102 boost::numeric::ublas::matrix<double> C (3, 3);
103 for (list<cxml::NodePtr>::iterator i = m.begin(); i != m.end(); ++i) {
104 int const ti = (*i)->number_attribute<int> ("i");
105 int const tj = (*i)->number_attribute<int> ("j");
106 C(ti, tj) = raw_convert<double> ((*i)->content ());
109 double const rd = C(0, 0) + C(1, 0) + C(2, 0);
110 _red = dcp::Chromaticity (C(0, 0) / rd, C(1, 0) / rd);
111 double const gd = C(0, 1) + C(1, 1) + C(2, 1);
112 _green = dcp::Chromaticity (C(0, 1) / gd, C(1, 1) / gd);
113 double const bd = C(0, 2) + C(1, 2) + C(2, 2);
114 _blue = dcp::Chromaticity (C(0, 2) / bd, C(1, 2) / bd);
115 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);
116 _white = dcp::Chromaticity ((C(0, 0) + C(0, 1) + C(0, 2)) / wd, (C(1, 0) + C(1, 1) + C(1, 2)) / wd);
118 /* New-style chromaticities */
119 _red = dcp::Chromaticity (node->number_child<double> ("RedX"), node->number_child<double> ("RedY"));
120 _green = dcp::Chromaticity (node->number_child<double> ("GreenX"), node->number_child<double> ("GreenY"));
121 _blue = dcp::Chromaticity (node->number_child<double> ("BlueX"), node->number_child<double> ("BlueY"));
122 _white = dcp::Chromaticity (node->number_child<double> ("WhiteX"), node->number_child<double> ("WhiteY"));
123 if (node->optional_node_child ("AdjustedWhiteX")) {
124 _adjusted_white = dcp::Chromaticity (
125 node->number_child<double> ("AdjustedWhiteX"), node->number_child<double> ("AdjustedWhiteY")
130 optional<double> gamma = node->optional_number_child<double> ("OutputGamma");
132 _out.reset (new dcp::GammaTransferFunction (node->number_child<double> ("OutputGamma")));
134 _out.reset (new dcp::IdentityTransferFunction ());
138 boost::optional<ColourConversion>
139 ColourConversion::from_xml (cxml::NodePtr node, int version)
141 if (!node->optional_node_child ("InputTransferFunction")) {
142 return boost::optional<ColourConversion> ();
145 return ColourConversion (node, version);
149 ColourConversion::as_xml (xmlpp::Node* node) const
151 xmlpp::Node* in_node = node->add_child ("InputTransferFunction");
152 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
153 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
154 in_node->add_child("Type")->add_child_text ("Gamma");
155 in_node->add_child("Gamma")->add_child_text (raw_convert<string> (tf->gamma ()));
156 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
157 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
158 in_node->add_child("Type")->add_child_text ("ModifiedGamma");
159 in_node->add_child("Power")->add_child_text (raw_convert<string> (tf->power ()));
160 in_node->add_child("Threshold")->add_child_text (raw_convert<string> (tf->threshold ()));
161 in_node->add_child("A")->add_child_text (raw_convert<string> (tf->A ()));
162 in_node->add_child("B")->add_child_text (raw_convert<string> (tf->B ()));
163 } else if (dynamic_pointer_cast<const dcp::SGamut3TransferFunction> (_in)) {
164 in_node->add_child("Type")->add_child_text ("SGamut3");
167 node->add_child("YUVToRGB")->add_child_text (raw_convert<string> (static_cast<int> (_yuv_to_rgb)));
168 node->add_child("RedX")->add_child_text (raw_convert<string> (_red.x));
169 node->add_child("RedY")->add_child_text (raw_convert<string> (_red.y));
170 node->add_child("GreenX")->add_child_text (raw_convert<string> (_green.x));
171 node->add_child("GreenY")->add_child_text (raw_convert<string> (_green.y));
172 node->add_child("BlueX")->add_child_text (raw_convert<string> (_blue.x));
173 node->add_child("BlueY")->add_child_text (raw_convert<string> (_blue.y));
174 node->add_child("WhiteX")->add_child_text (raw_convert<string> (_white.x));
175 node->add_child("WhiteY")->add_child_text (raw_convert<string> (_white.y));
176 if (_adjusted_white) {
177 node->add_child("AdjustedWhiteX")->add_child_text (raw_convert<string> (_adjusted_white.get().x));
178 node->add_child("AdjustedWhiteY")->add_child_text (raw_convert<string> (_adjusted_white.get().y));
181 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out)) {
182 shared_ptr<const dcp::GammaTransferFunction> gf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out);
183 node->add_child("OutputGamma")->add_child_text (raw_convert<string> (gf->gamma ()));
188 ColourConversion::preset () const
190 vector<PresetColourConversion> presets = PresetColourConversion::all ();
192 while (i < presets.size() && presets[i].conversion != *this) {
196 if (i >= presets.size ()) {
197 return optional<size_t> ();
204 ColourConversion::identifier () const
208 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
209 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
210 digester.add (tf->gamma ());
211 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
212 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
213 digester.add (tf->power ());
214 digester.add (tf->threshold ());
215 digester.add (tf->A ());
216 digester.add (tf->B ());
219 digester.add (_red.x);
220 digester.add (_red.y);
221 digester.add (_green.x);
222 digester.add (_green.y);
223 digester.add (_blue.x);
224 digester.add (_blue.y);
225 digester.add (_white.x);
226 digester.add (_white.y);
228 if (_adjusted_white) {
229 digester.add (_adjusted_white.get().x);
230 digester.add (_adjusted_white.get().y);
233 shared_ptr<const dcp::GammaTransferFunction> gf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out);
235 digester.add (gf->gamma ());
238 return digester.get ();
241 PresetColourConversion::PresetColourConversion ()
242 : name (_("Untitled"))
247 PresetColourConversion::PresetColourConversion (string n, string i, dcp::ColourConversion conversion_)
248 : conversion (conversion_)
255 PresetColourConversion::PresetColourConversion (cxml::NodePtr node, int version)
256 : conversion (node, version)
257 , name (node->string_child ("Name"))
263 operator== (ColourConversion const & a, ColourConversion const & b)
265 return a.about_equal (b, 1e-6);
269 operator!= (ColourConversion const & a, ColourConversion const & b)
275 operator== (PresetColourConversion const & a, PresetColourConversion const & b)
277 return a.name == b.name && a.conversion == b.conversion;
281 PresetColourConversion::setup_colour_conversion_presets ()
283 _presets.push_back (PresetColourConversion (_("sRGB"), "srgb", dcp::ColourConversion::srgb_to_xyz ()));
284 _presets.push_back (PresetColourConversion (_("Rec. 601"), "rec601", dcp::ColourConversion::rec601_to_xyz ()));
285 _presets.push_back (PresetColourConversion (_("Rec. 709"), "rec709", dcp::ColourConversion::rec709_to_xyz ()));
286 _presets.push_back (PresetColourConversion (_("P3"), "p3", dcp::ColourConversion::p3_to_xyz ()));
287 _presets.push_back (PresetColourConversion (_("Rec. 1886"), "rec1886", dcp::ColourConversion::rec1886_to_xyz ()));
288 _presets.push_back (PresetColourConversion (_("Rec. 2020"), "rec2020", dcp::ColourConversion::rec2020_to_xyz ()));
289 _presets.push_back (PresetColourConversion (_("S-Gamut3/S-Log3"), "sgamut3", dcp::ColourConversion::s_gamut3_to_xyz ()));
292 PresetColourConversion
293 PresetColourConversion::from_id (string s)
295 for (auto const& i: _presets) {
301 DCPOMATIC_ASSERT (false);