l">NULL</code></a> may be
used to specify no output. This will generate a PDF surface that
may be queried and used as a source, without generating a
temporary file.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width_in_points</code></em> :</span></p></td>
<td>width of the surface, in points (1 point == 1/72.0 inch)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height_in_points</code></em> :</span></p></td>
<td>height of the surface, in points (1 point == 1/