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9<title>GXSetAlphaUpdate</title>
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14<h1 align="left">GXSetAlphaUpdate</h1>
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17<h2>C Specification</h2>
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19<dl>
20<dd><PRE><CODE>#include &lt;revolution/gx.h&gt;</CODE></PRE>
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22<dd><pre>void GXSetAlphaUpdate( <a href="../Enumerated_Types/GXBool.html">GXBool</a> update_enable );</pre>
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26<h2>Arguments</h2>
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29<TD width="120" bgcolor="#ffffe8"><em><strong>update_enable</strong></em></TD>
30<TD width="520">Enables alpha-buffer updates when <code>GX_TRUE</code>.</TD>
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33<h2>Return Values</h2>
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35<p>None.</p>
36<H2>Description</H2>
37<P>This function enables or disables alpha-buffer updates of the embedded frame buffer (EFB). This function also effects whether the alpha buffer is cleared during copy operations. For more information, see <a href="../Framebuffer/GXCopyDisp.html"><code>GXCopyDisp</code></a> and <a href="../Framebuffer/GXCopyTex.html"><code>GXCopyTex</code></a>.&nbsp;The only EFB pixel format that supports an alpha buffer is <code>GX_PF_RGBA6_Z24</code>. For more information, see <a href="GXSetPixelFmt.html"><code>GXSetPixelFmt</code></a>.&nbsp;The alpha <em><strong><code>update_enable</code></strong></em> is ignored for non-alpha pixel formats.</P>
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42<h2>See Also</h2>
43<P><a href="GXSetColorUpdate.html">GXSetColorUpdate</a><br> <a href="GXSetPixelFmt.html">GXSetPixelFmt </a></P>
44<H2>Revision History</H2>
45<P>2006/03/01 Initial version.</P>
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47<P>CONFIDENTIAL</p>
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