ummary">get a rectangle of screen content.</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#poke">poke (x, y, w, h, s)</a></td>
	<td class="summary">set a rectangle of screen content.</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#rotate">rotate (r)</a></td>
	<td class="summary">rotate</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#translate">translate (x, y)</a></td>
	<td class="summary">move origin position</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#save">save ()</a></td>
	<td cl