2 Copyright (C) 2014-2023 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 "dcpomatic_assert.h"
23 #include "dcpomatic_log.h"
25 #include "font_config.h"
27 #include <dcp/filesystem.h>
28 #include <fontconfig/fontconfig.h>
29 #include <boost/filesystem.hpp>
30 #include <boost/optional.hpp>
33 using std::shared_ptr;
35 using boost::optional;
38 FontConfig* FontConfig::_instance;
41 FontConfig::FontConfig()
43 _config = FcInitLoadConfigAndFonts();
44 FcConfigSetCurrent(_config);
48 FontConfig::~FontConfig()
50 for (auto file: _temp_files) {
51 boost::system::error_code ec;
52 dcp::filesystem::remove(file, ec);
58 FontConfig::make_font_available(shared_ptr<dcpomatic::Font> font)
60 DCPOMATIC_ASSERT(font);
62 auto existing = _available_fonts.find(font->content());
63 if (existing != _available_fonts.end()) {
64 return existing->second;
67 boost::filesystem::path font_file = default_font_file();
69 font_file = *font->file();
70 } else if (font->data()) {
71 /* This font only exists in memory (so far) but FontConfig doesn't have an API to add a font
72 * from a memory buffer (AFAICS).
73 * https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues/12
74 * As a workaround, write the font data to a temporary file and use that.
76 font_file = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
77 _temp_files.push_back(font_file);
78 font->data()->write(font_file);
82 /* Make this font available to DCP-o-matic */
83 optional<string> font_name;
84 FcConfigAppFontAddFile (_config, reinterpret_cast<FcChar8 const *>(font_file.string().c_str()));
85 auto pattern = FcPatternBuild (
86 0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast<char *>(0)
88 auto object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast<char *> (0));
89 auto font_set = FcFontList (_config, pattern, object_set);
91 for (int i = 0; i < font_set->nfont; ++i) {
92 FcPattern* font = font_set->fonts[i];
97 FcPatternGetString (font, FC_FILE, 0, &file) == FcResultMatch &&
98 FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch &&
99 FcPatternGetString (font, FC_STYLE, 0, &style) == FcResultMatch
101 font_name = reinterpret_cast<char const *> (family);
105 FcFontSetDestroy (font_set);
108 FcObjectSetDestroy (object_set);
109 FcPatternDestroy (pattern);
111 DCPOMATIC_ASSERT(font_name);
113 /* We need to use the font object as the key, as we may be passed the same shared_ptr to a modified
114 * Font object in the future and in that case we need to load the new font.
116 _available_fonts[font->content()] = *font_name;
118 FcConfigBuildFonts(_config);
123 optional<boost::filesystem::path>
124 FontConfig::system_font_with_name(string name)
126 optional<boost::filesystem::path> path;
128 LOG_GENERAL("Searching system for font %1", name);
129 auto pattern = FcNameParse(reinterpret_cast<FcChar8 const*>(name.c_str()));
130 auto object_set = FcObjectSetBuild(FC_FILE, nullptr);
131 auto font_set = FcFontList(_config, pattern, object_set);
133 LOG_GENERAL("%1 candidate fonts found", font_set->nfont);
134 for (int i = 0; i < font_set->nfont; ++i) {
135 auto font = font_set->fonts[i];
137 if (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch) {
138 path = boost::filesystem::path(reinterpret_cast<char*>(file));
139 LOG_GENERAL("Found %1", *path);
143 FcFontSetDestroy(font_set);
145 LOG_GENERAL_NC("No candidate fonts found");
148 FcObjectSetDestroy(object_set);
149 FcPatternDestroy(pattern);
152 LOG_GENERAL("Searched system for font %1, found %2", name, *path);
154 LOG_GENERAL("Searched system for font %1; nothing found", name);
162 FontConfig::instance()
165 _instance = new FontConfig();