Font_Cache FontFamily_Impl::get_font(const FontDescription &desc, float pixel_ratio)
{
// Find cached version
for (auto &cache : font_cache)
{
if (cache.pixel_ratio != pixel_ratio)
continue;
if (desc.get_style() != cache.engine->get_desc().get_style())
continue;
if (desc.get_weight() != cache.engine->get_desc().get_weight())
continue;
if (desc.get_subpixel() != cache.engine->get_desc().get_subpixel())
continue;
if (desc.get_anti_alias() != cache.engine->get_desc().get_anti_alias())
continue;
if (cache.engine->is_automatic_recreation_allowed())
{
if (desc.get_height() != cache.engine->get_desc().get_height())
continue;
}
return cache;
}
return Font_Cache();
}
void FontProvider_Vector::load_font(const FontDescription &desc, const std::string &filename)
{
#ifdef WIN32
font_engine = new FontEngine_Win32(desc, filename);
#elif defined(__APPLE__)
font_engine = new FontEngine_Cocoa(desc, filename);
#else
std::string font_file_path = filename;
if (font_file_path.empty())
{
// Obtain the best matching font file from fontconfig.
FontConfig &fc = FontConfig::instance();
font_file_path = fc.match_font(desc);
}
std::string path = PathHelp::get_fullpath(font_file_path, PathHelp::path_type_file);
std::string new_filename = PathHelp::get_filename(font_file_path, PathHelp::path_type_file);
FileSystem vfs(path);
IODevice io_dev = vfs.open_file(new_filename);
int average_width = desc.get_average_width();
int height = desc.get_height();
// Ensure width and height are positive
if (average_width < 0) average_width =-average_width;
if (height < 0) height =-height;
font_engine = new FontEngine_Freetype(io_dev, average_width, height);
#endif
metrics = font_engine->get_metrics();
}
std::string FontConfig::match_font(const std::string &typeface_name, const FontDescription &desc) const
{
FcPattern * fc_pattern = nullptr;
FcPattern * fc_match = nullptr;
try
{
int weight = static_cast<int>(desc.get_weight());
// Build font matching pattern.
fc_pattern = FcPatternBuild(nullptr,
FC_FAMILY, FcTypeString, typeface_name.c_str(),
FC_PIXEL_SIZE, FcTypeDouble, (double)std::abs(desc.get_height()),
FC_WEIGHT, FcTypeInteger, (weight > 0) ? (int)(weight * (FC_WEIGHT_HEAVY / 900.0)) : FC_WEIGHT_NORMAL,
FC_SLANT, FcTypeInteger, (desc.get_style() == clan::FontStyle::italic) ? FC_SLANT_ITALIC : ((desc.get_style() == clan::FontStyle::oblique) ? FC_SLANT_OBLIQUE : FC_SLANT_ROMAN),
FC_SPACING, FcTypeInteger, FC_PROPORTIONAL,
(char*) nullptr
);
if (!fc_pattern)
{
throw Exception("CL_FontConfig: Building FontConfig pattern failed.");
}
// Execute any needed param substitutions required by the system config.
if (FcTrue != FcConfigSubstitute(fc_config, fc_pattern, FcMatchPattern))
{
throw Exception("CL_FontConfig: Font config substitutions failed.");
}
// Supply default values for underspecified font patterns. Never fails.
FcDefaultSubstitute(fc_pattern);
// Find best match for pattern and extract filename.
FcResult match_result; // Doesn't appear to be actually updated.
fc_match = FcFontMatch(fc_config, fc_pattern, &match_result);
FcChar8 * fc_font_file_path = nullptr;
if (FcResultMatch != FcPatternGetString(fc_match, FC_FILE, 0, &fc_font_file_path))
{
throw Exception("CL_FontConfig: Could not resolve font pattern to a font file.");
}
// Release resources and return results.
std::string cl_font_file_path((char*)fc_font_file_path);
FcPatternDestroy(fc_match);
FcPatternDestroy(fc_pattern);
return cl_font_file_path;
}
catch (...)
{
// If any exceptions thrown, ensure fontconfig resources are released.
if (fc_match) FcPatternDestroy(fc_match);
if (fc_pattern) FcPatternDestroy(fc_pattern);
throw;
}
}
void Font_Impl::load_font( GraphicContext &context, const FontDescription &desc, const std::string &filename )
{
free_font();
if (desc.get_subpixel())
{
glyph_cache.enable_subpixel = true;
glyph_cache.anti_alias = true; // Implies anti_alias is set
}
else
{
glyph_cache.enable_subpixel = false;
glyph_cache.anti_alias = desc.get_anti_alias();
}
#ifdef WIN32
std::string path = PathHelp::get_fullpath(filename, PathHelp::path_type_file);
std::string new_filename = PathHelp::get_filename(filename, PathHelp::path_type_file);
FileSystem vfs(path);
font_engine = new FontEngine_Win32(desc, new_filename, vfs);
glyph_cache.font_metrics = font_engine->get_metrics();
#elif defined(__APPLE__)
font_engine = new FontEngine_Cocoa(desc, filename);
glyph_cache.font_metrics = font_engine->get_metrics();
#else
std::string font_file_path = filename;
if (font_file_path.empty())
{
// Obtain the best matching font file from fontconfig.
FontConfig &fc = FontConfig::instance();
font_file_path = fc.match_font(desc);
}
std::string path = PathHelp::get_fullpath(font_file_path, PathHelp::path_type_file);
std::string new_filename = PathHelp::get_filename(font_file_path, PathHelp::path_type_file);
FileSystem vfs(path);
IODevice io_dev = vfs.open_file(new_filename);
int average_width = desc.get_average_width();
int height = desc.get_height();
// Ensure width and height are positive
if (average_width < 0) average_width =-average_width;
if (height < 0) height =-height;
font_engine = new FontEngine_Freetype(io_dev, average_width, height);
glyph_cache.font_metrics = font_engine->get_metrics();
#endif
}
void Font_Impl::load_font( GraphicContext &context, const FontDescription &desc, const std::string &filename, FileSystem &fs)
{
free_font();
if (desc.get_subpixel())
{
glyph_cache.enable_subpixel = true;
glyph_cache.anti_alias = true; // Implies anti_alias is set
}
else
{
glyph_cache.enable_subpixel = false;
glyph_cache.anti_alias = desc.get_anti_alias();
}
#ifdef WIN32
font_engine = new FontEngine_Win32(desc, filename, fs);
glyph_cache.font_metrics = font_engine->get_metrics();
#elif defined(__APPLE__)
font_engine = new FontEngine_Cocoa(desc, filename);
glyph_cache.font_metrics = font_engine->get_metrics();
#else
IODevice io_dev = fs.open_file(filename);
int average_width = desc.get_average_width();
int height = desc.get_height();
// Ensure width and height are positive
if (average_width < 0) average_width =-average_width;
if (height < 0) height =-height;
font_engine = new FontEngine_Freetype(io_dev, average_width, height);
glyph_cache.font_metrics = font_engine->get_metrics();
#endif
}
