1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
2<HTML>
3<HEAD>
4<META http-equiv="Content-Type" content="text/html; charset=windows-1252">
5<META name="GENERATOR" content="Microsoft FrontPage 5.0">
6<META http-equiv="Content-Style-Type" content="text/css">
7<LINK rel="stylesheet" type="text/css" href="../../CSS/revolution.css">
8<TITLE>GXInvalidateTexRegion</TITLE>
9</HEAD>
10<BODY>
11<H1 align="left">GXInvalidateTexRegion</H1>
12
13<H2>Syntax</H2>
14<dl><dd><pre class="construction">
15#include &lt;revolution/gx.h&gt;
16
17void GXInvalidateTexRegion( const <A href="../Structures/GXTexRegion.html">GXTexRegion</A>* region );
18</pre></dd></dl>
19
20<H2>Arguments</H2>
21<TABLE class="arguments" border="1" >
22  <TBODY>
23    <TR>
24<TH>region</TH>
25<TD>Pointer to a <a href="../Structures/GXTexRegion.html"><code>GXTexRegion</code></a> object.</TD>
26    </TR>
27  </TBODY>
28</TABLE>
29
30<H2>Return Values</H2>
31<P>None.</P>
32
33<H2>Description</H2>
34<P>This function invalidates the texture cache in texture memory (TMEM) specified by <SPAN class="argument">region</SPAN>. More accurately, this function invalidates the cache tags, forcing the texture cache to load new data.&nbsp;Call this function if textures in main memory will be manipulated in the CPU, or if loading new textures to a main memory region that may have been cached. Preloaded textures (see the <A href="GXPreLoadEntireTexture.html"><CODE>GXPreLoadEntireTexture</CODE></A> function) do not use tags.</P>
35<P>The texture hardware can disable four tags per each graphics processor (GP) clock cycle. Each tag represents either a superline of TMEM (&quot;superlines&quot; are cache-internal units), or 512 bytes. Therefore, it takes 16 GP clock cycles to disable a 32-KB texture region.</P>
36
37<H2>See Also</H2>
38<P class="reference">
39<A href="GXInvalidateTexAll.html">GXInvalidateTexAll</A>,
40<A href="GXInitTexCacheRegion.html">GXInitTexCacheRegion</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>