Move fontconfig-related code out to a class.

1 files changed, 97 insertions, 0 deletions

diff --git a/src/lib/font_config.cc b/src/lib/font_config.cc
new file mode 100644
index 000000000..c7361bc04
--- /dev/null
+++ b/src/lib/font_config.cc
@@ -0,0 +1,97 @@
+/*
+    Copyright (C) 2014-2021 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "dcpomatic_assert.h"
+#include "font_config.h"
+#include <fontconfig/fontconfig.h>
+#include <boost/optional.hpp>
+
+
+using std::string;
+using boost::optional;
+
+
+FontConfig* FontConfig::_instance;
+
+
+FontConfig::FontConfig()
+{
+	_config = FcInitLoadConfigAndFonts();
+	FcConfigSetCurrent(_config);
+}
+
+
+string
+FontConfig::make_font_available(boost::filesystem::path font_file)
+{
+	auto existing = _available_fonts.find(font_file);
+	if (existing != _available_fonts.end()) {
+		return existing->second;
+	}
+
+	/* Make this font available to DCP-o-matic */
+	optional<string> font_name;
+	FcConfigAppFontAddFile (_config, reinterpret_cast<FcChar8 const *>(font_file.string().c_str()));
+	auto pattern = FcPatternBuild (
+		0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast<char *>(0)
+		);
+	auto object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast<char *> (0));
+	auto font_set = FcFontList (_config, pattern, object_set);
+	if (font_set) {
+		for (int i = 0; i < font_set->nfont; ++i) {
+			FcPattern* font = font_set->fonts[i];
+			FcChar8* file;
+			FcChar8* family;
+			FcChar8* style;
+			if (
+				FcPatternGetString (font, FC_FILE, 0, &file) == FcResultMatch &&
+				FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch &&
+				FcPatternGetString (font, FC_STYLE, 0, &style) == FcResultMatch
+				) {
+				font_name = reinterpret_cast<char const *> (family);
+			}
+		}
+
+		FcFontSetDestroy (font_set);
+	}
+
+	FcObjectSetDestroy (object_set);
+	FcPatternDestroy (pattern);
+
+	DCPOMATIC_ASSERT(font_name);
+
+	_available_fonts[font_file] = *font_name;
+
+	FcConfigBuildFonts(_config);
+	return *font_name;
+}
+
+
+FontConfig *
+FontConfig::instance()
+{
+	if (!_instance) {
+		_instance = new FontConfig();
+	}
+
+	return _instance;
+}
+