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8<TITLE>GXInvalidateTexRegion</TITLE>
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11<H1 align="left">GXInvalidateTexRegion</H1>
12<H2>C Specification</H2>
13<DL>
14  <DD>
15<PRE><CODE>#include &lt;revolution/gx.h&gt;</CODE></PRE>
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17<PRE><CODE>void GXInvalidateTexRegion( const <a href="../Structures/GXTexRegion.html">GXTexRegion</a>* region );</CODE></PRE>
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19<H2>Arguments</H2>
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23<TD width="120" bgcolor="#ffffe8"><EM><STRONG><CODE>region</CODE></STRONG></EM></TD>
24<TD width="520">A pointer to a <a href="../Structures/GXTexRegion.html"><code>GXTexRegion</code></a> object</TD>
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28<H2>Return Values</H2>
29<P>None.</P>
30<H2>Description</H2>
31<P>This function invalidates the texture cache in texture memory (TMEM) described by <code><em><strong>region</strong></em></code>. More accurately, this function invalidates the cache tags, forcing the texture cache to load new data.&nbsp;This function should be called for using the CPU to modify a texture in main memory, or to load a new texture into main memory that might be cached in the texture region.&nbsp;Preloaded textures (see <a href="GXPreLoadEntireTexture.html"><code>GXPreLoadEntireTexture</code></a>) do not use the tags.</P>
32<P>The texture hardware can invalidate four tags per each graphics processor (GP) clock cycle. Each tag represents a superline or 512B of TMEM.&nbsp;Therefore, it takes 16 GP clock cycles to invalidate a 32KB texture region.</P>
33<H2>See Also</H2>
34<P><a href="GXInvalidateTexAll.html">GXInvalidateTexAll</a><br> <a href="GXInitTexCacheRegion.html">GXInitTexCacheRegion</a></P>
35<H2>Revision History</H2>
36<P>03/01/2006 Initial version.</P>
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