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14<h1 align="left">GXSetAlphaUpdate</h1>
15
16<h2>Syntax</h2>
17<dl><dd><pre class="construction">
18#include &lt;revolution/gx.h&gt;
19
20void GXSetAlphaUpdate( <a href="../Enumerated_Types/GXBool.html">GXBool</a> update_enable );
21</pre></dd></dl>
22
23<h2>Arguments</h2>
24<TABLE class="arguments" border="1" >
25  <tr>
26<TH>update_enable</TH>
27<TD>Enables alpha buffer updates when <code>GX_TRUE</code>.</TD>
28  </tr>
29</TABLE>
30
31<h2>Return Values</h2>
32<p>None.</p>
33
34<H2>Description</H2>
35<P>Enables or disables alpha buffer updates of the embedded frame buffer (EFB). This function also affects whether the alpha buffer is cleared during copy operations. For more information, see the <A href="../Framebuffer/GXCopyDisp.html"><CODE>GXCopyDisp</CODE></A> and <A href="../Framebuffer/GXCopyTex.html"><CODE>GXCopyTex</CODE></A> functions.&nbsp;The only EFB pixel format that supports an alpha buffer is <CODE>GX_PF_RGBA6_Z24</CODE>. For more information, see the <A href="GXSetPixelFmt.html"><CODE>GXSetPixelFmt</CODE></A> function.&nbsp;The alpha <SPAN class="argument">update_enable</SPAN> permission is ignored for non-alpha pixel formats.</P>
36
37<h2>See Also</h2>
38<P>
39<A href="GXGetAlphaUpdate.html"><CODE>GXGetAlphaUpdate</CODE></A><BR> <A href="GXSetColorUpdate.html"><CODE>GXSetColorUpdate</CODE></A><BR> <A href="GXSetPixelFmt.html"><CODE>GXSetPixelFmt</CODE></A>
40</P>
41
42<H2>Revision History</H2>
43<P>
442009/01/05 Added the <CODE>GXGetAlphaUpdate</CODE> function under <B>See Also</B>.<br>2006/03/01 Initial version.
45</P>
46
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