1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
2<html>
3
4<head>
5<META http-equiv="Content-Type" content="text/html; charset=windows-1252">
6<META name="GENERATOR" content="Microsoft FrontPage 5.0">
7<META http-equiv="Content-Style-Type" content="text/css">
8<LINK rel="stylesheet" type="text/css" href="../../CSS/revolution.css">
9<title>GXSetAlphaUpdate</title>
10</head>
11
12<body>
13
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>This function 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 class="reference">
39<A href="GXSetColorUpdate.html">GXSetColorUpdate</A>,
40<A href="GXSetPixelFmt.html">GXSetPixelFmt</A>
41</P>
42
43<H2>Revision History</H2>
44<P>
452006/03/01 Initial version.<br>
46</P>
47
48<hr><p>CONFIDENTIAL</p></body>
49</HTML>