Method LoadFont

src/fontcache/freetypefontcache.cpp:229–273

* Loads the freetype font. * First try to load the fontname as if it were a path. If that fails, * try to resolve the filename of the font using fontconfig, where the * format is 'font family name' or 'font family name, font style'. * @param fs The font size to load. */

	 * @param fs The font size to load.
	 */
	std::unique_ptr<FontCache> LoadFont(FontSize fs, FontType fonttype) const override
	{
		if (fonttype != FontType::TrueType) return nullptr;

		FontCacheSubSetting *settings = GetFontCacheSubSetting(fs);

		std::string font = GetFontCacheFontName(fs);
		if (font.empty()) return nullptr;

		if (_ft_library == nullptr) {
			if (FT_Init_FreeType(&_ft_library) != FT_Err_Ok) {
				ShowInfo("Unable to initialize FreeType, using sprite fonts instead");
				return nullptr;
			}

			Debug(fontcache, 2, "Initialized");
		}

		FT_Face face = nullptr;

		/* If font is an absolute path to a ttf, try loading that first. */
		int32_t index = 0;
		if (settings->os_handle != nullptr) index = *static_cast<const int32_t *>(settings->os_handle);
		FT_Error error = FT_New_Face(_ft_library, font.c_str(), index, &face);

		if (error != FT_Err_Ok) {
			/* Check if font is a relative filename in one of our search-paths. */
			std::string full_font = FioFindFullPath(BASE_DIR, font);
			if (!full_font.empty()) {
				error = FT_New_Face(_ft_library, full_font.c_str(), 0, &face);
			}
		}

#ifdef WITH_FONTCONFIG
		/* Try loading based on font face name (OS-wide fonts). */
		if (error != FT_Err_Ok) error = GetFontByFaceName(font, &face);
#endif /* WITH_FONTCONFIG */

		if (error != FT_Err_Ok) {
			FT_Done_Face(face);
			return nullptr;
		}

		return LoadFont(fs, face, font, GetFontCacheFontSize(fs));
	}

	bool FindFallbackFont(struct FontCacheSettings *settings, const std::string &language_isocode, class MissingGlyphSearcher *callback) const override
	{