Drawing font icons from Fontello.com in ruby gosu
@gosu_font = Gosu::Font.new($window, '/path/to/fontello/font/file.ttf', font_size)
@icon_characters = FontelloConfig.parse_file './path/to/fontello/config.json'
@gosu_font.draw(@icon_characters['icon-pencil'], x, y, z, scale_x, scale_y, color)