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8<TITLE>GXGetNumXfbLines</TITLE>
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11<H1 align="left">GXGetNumXfbLines</H1>
12
13<H2>Syntax</H2>
14<dl><dd><pre class="construction">
15#include &lt;revolution/gx.h&gt;
16
17u16 GXGetNumXfbLines( u16 efbHeight, f32 yscale );
18</pre></dd></dl>
19
20<H2>Arguments</H2>
21<TABLE class="arguments" border="1" >
22  <TBODY>
23    <TR>
24<TH>efbHeight</TH>
25<TD>Height of embedded frame buffer (EFB). Ranges from 2 to 528. Should be a multiple of 2.</TD>
26    </TR>
27    <TR>
28<TH>yscale</TH>
29<TD>Vertical scale value. Range from 1.0 to 256.0.</TD>
30    </TR>
31  </TBODY>
32</TABLE>
33
34<H2>Return Values</H2>
35<P>Number of lines that will be copied.</P>
36
37<H2>Description</H2>
38<P>This is a convenient function for calculating the number of lines copied to the external frame buffer (XFB), based on given EFB height and Y scale. You can use this number to allocate the proper XFB size. You can also obtain this return value using <a href="GXSetDispCopyYScale.html"><code>GXSetDispCopyYScale</code></a>. In contrast to <code><a href="GXSetDispCopyYScale.html">GXSetDispCopyYScale</a></code>, this function does not affect the graphics processor. It only calculates the number based on input arguments.</P>
39
40<H2>See Also</H2>
41<P class="reference">
42<A href="GXSetDispCopyYScale.html">GXSetDispCopyYScale</A>,
43<A href="GXGetYScaleFactor.html">GXGetYScaleFactor</A>
44</P>
45
46<H2>Revision History</H2>
47<P>
482006/03/01 Initial version.<br>
49</P>
50
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