/b>. The coordinates are for the upper
      left edge of the text. (If you want to draw from the baseline, subtract
      <tt>ascent</tt> from <tt>y</tt>.) The drawing area is an
      <tt>/icon</tt> datum returned by this proc. Text is white on a
      transparent background, but you can change it using the procs in
      <tt>/icon</tt>.</p>

      <p>If you specify <tt>icons_x</tt> or <tt>icons_y</tt> you can
      restrict the <tt>/icon</tt> to a particular size (in tiles, not
      pixels), or it will 