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 <fontconfig/fontconfig.h>
28 #include <boost/filesystem.hpp>
29 #include <boost/optional.hpp>
32 using std::shared_ptr;
34 using boost::optional;
37 FontConfig* FontConfig::_instance;
40 FontConfig::FontConfig()
42 _config = FcInitLoadConfigAndFonts();
43 FcConfigSetCurrent(_config);
47 FontConfig::~FontConfig()
49 for (auto file: _temp_files) {
50 boost::system::error_code ec;
51 boost::filesystem::remove(file, ec);
57 FontConfig::make_font_available(shared_ptr<dcpomatic::Font> font)
59 auto existing = _available_fonts.find(font->content());
60 if (existing != _available_fonts.end()) {
61 return existing->second;
64 boost::filesystem::path font_file = default_font_file();
66 font_file = *font->file();
67 } else if (font->data()) {
68 /* This font only exists in memory (so far) but FontConfig doesn't have an API to add a font
69 * from a memory buffer (AFAICS).
70 * https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues/12
71 * As a workaround, write the font data to a temporary file and use that.
73 font_file = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
74 _temp_files.push_back(font_file);
75 font->data()->write(font_file);
79 /* Make this font available to DCP-o-matic */
80 optional<string> font_name;
81 FcConfigAppFontAddFile (_config, reinterpret_cast<FcChar8 const *>(font_file.string().c_str()));
82 auto pattern = FcPatternBuild (
83 0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast<char *>(0)
85 auto object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast<char *> (0));
86 auto font_set = FcFontList (_config, pattern, object_set);
88 for (int i = 0; i < font_set->nfont; ++i) {
89 FcPattern* font = font_set->fonts[i];
94 FcPatternGetString (font, FC_FILE, 0, &file) == FcResultMatch &&
95 FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch &&
96 FcPatternGetString (font, FC_STYLE, 0, &style) == FcResultMatch
98 font_name = reinterpret_cast<char const *> (family);
102 FcFontSetDestroy (font_set);
105 FcObjectSetDestroy (object_set);
106 FcPatternDestroy (pattern);
108 DCPOMATIC_ASSERT(font_name);
110 /* We need to use the font object as the key, as we may be passed the same shared_ptr to a modified
111 * Font object in the future and in that case we need to load the new font.
113 _available_fonts[font->content()] = *font_name;
115 FcConfigBuildFonts(_config);
120 optional<boost::filesystem::path>
121 FontConfig::system_font_with_name(string name)
123 optional<boost::filesystem::path> path;
125 LOG_GENERAL("Searching system for font %1", name);
126 auto pattern = FcNameParse(reinterpret_cast<FcChar8 const*>(name.c_str()));
127 auto object_set = FcObjectSetBuild(FC_FILE, nullptr);
128 auto font_set = FcFontList(_config, pattern, object_set);
130 LOG_GENERAL("%1 candidate fonts found", font_set->nfont);
131 for (int i = 0; i < font_set->nfont; ++i) {
132 auto font = font_set->fonts[i];
134 if (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch) {
135 path = boost::filesystem::path(reinterpret_cast<char*>(file));
136 LOG_GENERAL("Found %1", *path);
140 FcFontSetDestroy(font_set);
142 LOG_GENERAL_NC("No candidate fonts found");
145 FcObjectSetDestroy(object_set);
146 FcPatternDestroy(pattern);
149 LOG_GENERAL("Searched system for font %1, found %2", name, *path);
151 LOG_GENERAL("Searched system for font %1; nothing found", name);
159 FontConfig::instance()
162 _instance = new FontConfig();