th a no-op <em class="parameter"><code>write_func</code></em>,
the surface may be queried or used as a source without
generating any temporary files.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td>
<td>the closure argument for <em class="parameter"><code>write_func</code></em>
</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 