The name of the font. See Builtin Fonts for the list of builtin fonts. You can also use the name of a font loaded via HaruDoc::loadTTF(), HaruDoc::loadTTC() and HaruDoc::loadType1().
The encoding to use. See Builtin Encodings for the list of supported encodings.
Returns a HaruFont instance with the specified fontname and encoding.
发生错误时抛出 HaruException 异常。