sp;Y corresponds to upper scanlines), unlike the system
        typically used for bitmaps (where the topmost scanline has
        coordinate&nbsp;0).  We must thus convert between the two systems
        when we define the pen position, and when we compute the topleft
        position of the bitmap.</p>
      </li>

      <li>
        <p>We set the transformation on each glyph to indicate the rotation
        matrix as well as a delta that will move the transformed image to
        the current pen position