ass="summary">save</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#blend_mode">blend_mode (index)</a></td>
	<td class="summary">change screen blending mode.</td>
	</tr>
</table>

<br/>
<br/>


    <h2 class="section-header "><a name="Functions"></a>Functions</h2>

    <dl class="function">
    <dt>
    <a name = "update_default"></a>
    <strong>update_default ()</strong>
    </dt>
    <dd>
    copy buffer to screen.







</dd>
    <dt>
    <a name = "ping"></a>
    <strong>ping ()</strong>
    </dt>