2 Copyright (C) 2013-2021 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/chromaticity.h>
27 #include <dcp/gamma_transfer_function.h>
28 #include <dcp/identity_transfer_function.h>
29 #include <dcp/modified_gamma_transfer_function.h>
30 #include <dcp/raw_convert.h>
31 #include <dcp/s_gamut3_transfer_function.h>
32 #include <dcp/warnings.h>
33 #include <libcxml/cxml.h>
34 LIBDCP_DISABLE_WARNINGS
35 #include <libxml++/libxml++.h>
36 LIBDCP_ENABLE_WARNINGS
43 using std::dynamic_pointer_cast;
45 using std::make_shared;
46 using std::shared_ptr;
49 using boost::optional;
50 using dcp::raw_convert;
53 vector<PresetColourConversion> PresetColourConversion::_presets;
56 ColourConversion::ColourConversion ()
57 : dcp::ColourConversion (dcp::ColourConversion::srgb_to_xyz ())
62 ColourConversion::ColourConversion (dcp::ColourConversion conversion_)
63 : dcp::ColourConversion (conversion_)
68 ColourConversion::ColourConversion (cxml::NodePtr node, int version)
70 shared_ptr<dcp::TransferFunction> in;
76 auto in_node = node->node_child ("InputTransferFunction");
77 auto in_type = in_node->string_child ("Type");
78 if (in_type == "Gamma") {
79 _in = make_shared<dcp::GammaTransferFunction>(in_node->number_child<double> ("Gamma"));
80 } else if (in_type == "ModifiedGamma") {
81 _in = make_shared<dcp::ModifiedGammaTransferFunction>(
82 in_node->number_child<double>("Power"),
83 in_node->number_child<double>("Threshold"),
84 in_node->number_child<double>("A"),
85 in_node->number_child<double>("B")
87 } else if (in_type == "SGamut3") {
88 _in = make_shared<dcp::SGamut3TransferFunction>();
95 if (node->bool_child ("InputGammaLinearised")) {
96 _in.reset (new dcp::ModifiedGammaTransferFunction (node->number_child<double> ("InputGamma"), 0.04045, 0.055, 12.92));
98 _in.reset (new dcp::GammaTransferFunction (node->number_child<double> ("InputGamma")));
102 _yuv_to_rgb = static_cast<dcp::YUVToRGB>(node->optional_number_child<int>("YUVToRGB").get_value_or(static_cast<int>(dcp::YUVToRGB::REC601)));
104 auto m = node->node_children ("Matrix");
106 /* Read in old <Matrix> nodes and convert them to chromaticities */
107 boost::numeric::ublas::matrix<double> C (3, 3);
109 int const ti = i->number_attribute<int>("i");
110 int const tj = i->number_attribute<int>("j");
111 C(ti, tj) = raw_convert<double>(i->content());
114 double const rd = C(0, 0) + C(1, 0) + C(2, 0);
115 _red = dcp::Chromaticity (C(0, 0) / rd, C(1, 0) / rd);
116 double const gd = C(0, 1) + C(1, 1) + C(2, 1);
117 _green = dcp::Chromaticity (C(0, 1) / gd, C(1, 1) / gd);
118 double const bd = C(0, 2) + C(1, 2) + C(2, 2);
119 _blue = dcp::Chromaticity (C(0, 2) / bd, C(1, 2) / bd);
120 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);
121 _white = dcp::Chromaticity ((C(0, 0) + C(0, 1) + C(0, 2)) / wd, (C(1, 0) + C(1, 1) + C(1, 2)) / wd);
123 /* New-style chromaticities */
124 _red = dcp::Chromaticity (node->number_child<double> ("RedX"), node->number_child<double> ("RedY"));
125 _green = dcp::Chromaticity (node->number_child<double> ("GreenX"), node->number_child<double> ("GreenY"));
126 _blue = dcp::Chromaticity (node->number_child<double> ("BlueX"), node->number_child<double> ("BlueY"));
127 _white = dcp::Chromaticity (node->number_child<double> ("WhiteX"), node->number_child<double> ("WhiteY"));
128 if (node->optional_node_child ("AdjustedWhiteX")) {
129 _adjusted_white = dcp::Chromaticity (
130 node->number_child<double> ("AdjustedWhiteX"), node->number_child<double> ("AdjustedWhiteY")
135 auto gamma = node->optional_number_child<double>("OutputGamma");
137 _out = make_shared<dcp::GammaTransferFunction>(node->number_child<double>("OutputGamma"));
139 _out = make_shared<dcp::IdentityTransferFunction>();
143 boost::optional<ColourConversion>
144 ColourConversion::from_xml (cxml::NodePtr node, int version)
146 if (!node->optional_node_child ("InputTransferFunction")) {
147 return boost::optional<ColourConversion> ();
150 return ColourConversion (node, version);
154 ColourConversion::as_xml(xmlpp::Element* element) const
156 auto in_node = cxml::add_child(element, "InputTransferFunction");
157 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
158 auto tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
159 cxml::add_text_child(in_node, "Type", "Gamma");
160 cxml::add_text_child(in_node, "Gamma", raw_convert<string>(tf->gamma()));
161 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
162 auto tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
163 cxml::add_text_child(in_node, "Type", "ModifiedGamma");
164 cxml::add_text_child(in_node, "Power", raw_convert<string>(tf->power ()));
165 cxml::add_text_child(in_node, "Threshold", raw_convert<string>(tf->threshold ()));
166 cxml::add_text_child(in_node, "A", raw_convert<string>(tf->A()));
167 cxml::add_text_child(in_node, "B", raw_convert<string>(tf->B()));
168 } else if (dynamic_pointer_cast<const dcp::SGamut3TransferFunction>(_in)) {
169 cxml::add_text_child(in_node, "Type", "SGamut3");
172 cxml::add_text_child(element, "YUVToRGB", raw_convert<string>(static_cast<int>(_yuv_to_rgb)));
173 cxml::add_text_child(element, "RedX", raw_convert<string>(_red.x));
174 cxml::add_text_child(element, "RedY", raw_convert<string>(_red.y));
175 cxml::add_text_child(element, "GreenX", raw_convert<string>(_green.x));
176 cxml::add_text_child(element, "GreenY", raw_convert<string>(_green.y));
177 cxml::add_text_child(element, "BlueX", raw_convert<string>(_blue.x));
178 cxml::add_text_child(element, "BlueY", raw_convert<string>(_blue.y));
179 cxml::add_text_child(element, "WhiteX", raw_convert<string>(_white.x));
180 cxml::add_text_child(element, "WhiteY", raw_convert<string>(_white.y));
181 if (_adjusted_white) {
182 cxml::add_text_child(element, "AdjustedWhiteX", raw_convert<string>(_adjusted_white.get().x));
183 cxml::add_text_child(element, "AdjustedWhiteY", raw_convert<string>(_adjusted_white.get().y));
186 if (auto gf = dynamic_pointer_cast<const dcp::GammaTransferFunction>(_out)) {
187 cxml::add_text_child(element, "OutputGamma", raw_convert<string>(gf->gamma()));
192 ColourConversion::preset () const
194 auto presets = PresetColourConversion::all ();
196 while (i < presets.size() && presets[i].conversion != *this) {
200 if (i >= presets.size ()) {
208 ColourConversion::identifier () const
212 if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
213 shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
214 digester.add (tf->gamma ());
215 } else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
216 shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
217 digester.add (tf->power ());
218 digester.add (tf->threshold ());
219 digester.add (tf->A ());
220 digester.add (tf->B ());
223 digester.add (_red.x);
224 digester.add (_red.y);
225 digester.add (_green.x);
226 digester.add (_green.y);
227 digester.add (_blue.x);
228 digester.add (_blue.y);
229 digester.add (_white.x);
230 digester.add (_white.y);
232 if (_adjusted_white) {
233 digester.add (_adjusted_white.get().x);
234 digester.add (_adjusted_white.get().y);
237 digester.add(static_cast<int>(_yuv_to_rgb));
239 auto gf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out);
241 digester.add (gf->gamma ());
244 return digester.get ();
247 PresetColourConversion::PresetColourConversion ()
248 : name (_("Untitled"))
253 PresetColourConversion::PresetColourConversion (string n, string i, dcp::ColourConversion conversion_)
254 : conversion (conversion_)
261 PresetColourConversion::PresetColourConversion (cxml::NodePtr node, int version)
262 : conversion (node, version)
263 , name (node->string_child ("Name"))
269 operator== (ColourConversion const & a, ColourConversion const & b)
271 return a.about_equal (b, 1e-6);
275 operator!= (ColourConversion const & a, ColourConversion const & b)
281 operator== (PresetColourConversion const & a, PresetColourConversion const & b)
283 return a.name == b.name && a.conversion == b.conversion;
287 PresetColourConversion::setup_colour_conversion_presets ()
289 _presets.push_back (PresetColourConversion (_("sRGB"), "srgb", dcp::ColourConversion::srgb_to_xyz ()));
290 _presets.push_back (PresetColourConversion (_("Rec. 601"), "rec601", dcp::ColourConversion::rec601_to_xyz ()));
291 _presets.push_back (PresetColourConversion (_("Rec. 709"), "rec709", dcp::ColourConversion::rec709_to_xyz ()));
292 _presets.push_back (PresetColourConversion (_("P3"), "p3", dcp::ColourConversion::p3_to_xyz ()));
293 _presets.push_back (PresetColourConversion (_("Rec. 1886"), "rec1886", dcp::ColourConversion::rec1886_to_xyz ()));
294 _presets.push_back (PresetColourConversion (_("Rec. 2020"), "rec2020", dcp::ColourConversion::rec2020_to_xyz ()));
295 _presets.push_back (PresetColourConversion (_("S-Gamut3/S-Log3"), "sgamut3", dcp::ColourConversion::s_gamut3_to_xyz ()));
298 PresetColourConversion
299 PresetColourConversion::from_id (string s)
301 for (auto const& i: _presets) {
307 DCPOMATIC_ASSERT (false);