           provide its own rendering callback in order to draw or compose
            directly the anti-aliased glyph on any target surface.</em></p>
          </li>

          <li>
            <p><b>glyph caching</b><br>
            Each time you request a glyph image from a font, FreeType&nbsp;2
            does it by parsing the relevant portion of the font file or font
            stream and interpreting it according to its font format.  This
            can be very slow for certain formats, including s