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="IBM WebSphere Studio Homepage Builder Version 8.0.0.0 for Windows"> 7<META http-equiv="Content-Style-Type" content="text/css"> 8<title>G3*_SwapBuffers</title> 9<LINK rel="stylesheet" href="../../css/nitro.css" type="text/css"> 10</head> 11 12<body> 13 14<h1 align="left">G3*_SwapBuffers <img src="../../image/NTR.gif"align="middle"><img src="../../image/TWL.gif" align="middle"></H1> 15<H2>Syntax</H2> 16 17<dl> 18 <dd> 19<PRE> 20<CODE>#include <nitro/gx/g3imm.h> 21#include <nitro/gx/g3b.h> 22#include <nitro/gx/g3c.h></CODE><BR> 23<CODE>void G3_SwapBuffers(GXSortMode am, GXBufferMode zw);</CODE> 24 25// Below are APIs for creating the display list (command list)<BR><CODE>void G3B_SwapBuffers(<A href="../gx/GXDLInfo.html">GXDLInfo</A>* info, GXSortMode am, GXBufferMode zw);</CODE><BR><CODE>void G3C_SwapBuffers(<A href="../gx/GXDLInfo.html">GXDLInfo</A>* info, GXSortMode am, GXBufferMode zw);</CODE><BR><CODE>void G3BS_SwapBuffers(<A href="../gx/GXDLInfo.html">GXDLInfo</A>* info, GXSortMode am, GXBufferMode zw);</CODE><BR><CODE>void G3CS_SwapBuffers(<A href="../gx/GXDLInfo.html">GXDLInfo</A>* info, GXSortMode am, GXBufferMode zw);</CODE></PRE></dd> 26</dl><h2>Arguments</h2> 27 28<table border="1" width="100%"> 29 <tr> 30 <td width="13%"><em><strong><font face="Courier New">info</font></strong></em></td> 31 <td width="87%">Command List Information.</td> 32 </tr> 33 <tr> 34 <td width="13%"><em><strong><font face="Courier New">am</font></strong></em></td> 35 <td width="87%">Translucent polygon y-sorting selection</td> 36 </tr> 37 <TR> 38 <TD><em><strong><font face="Courier New">zw</font></strong></em></TD> 39 <TD>Depth buffering selection</TD> 40 </TR> 41 </table> 42<h2>Return Values</h2> 43<p>None.</p> 44<H2>Description</H2> 45<P>This function swaps the data group referenced by the rendering engine. <em><strong><code>zw</code></strong></em> is the depth buffering selection flag that selects the value to use in the depth test. Buffering using w-values will not function normally for orthogonal projections. <em><strong><code>am</code></strong></em> is the translucent polygon sorting selection flag that should be set to the manual sort mode when you want to specify the drawing order when using shadow volumes. When the V-Blank period starts immediately after the <code>SwapBuffers</code> command is issued, the data that is referenced by the rendering engine is swapped. This data includes the polygon list RAM, vertex RAM, and rendering-related registers. Therefore, the written graphics data will be rendered in the frame after the V-Blank that is started after the <code>SwapBuffers</code> command was issued.<BR> <b>Note</b>: When this instruction is issued after the V-Blank begins, the data will be swapped when the next V-Blank begins. <b>Note</b>: The Geometry engine will maintain a busy status until the data swap is performed. In addition, subsequent processing of geometry commands is not performed. 46</P> 47<TABLE border="1"> 48 <TBODY> 49 <TR> 50 <TD width="30%"><CODE>GX_SORTMODE_AUTO</CODE></TD> 51 <TD width="70%">Auto sort mode</TD> 52 </TR> 53 <TR> 54 <TD width="30%"><CODE>GX_SORTMODE_MANUAL</CODE></TD> 55 <TD width="70%">Manual sort mode</TD> 56 </TR> 57 </TBODY> 58</TABLE> 59<P></P> 60<TABLE border="1"> 61 <TBODY> 62 <TR> 63 <TD width="30%"><CODE>GX_BUFFERMODE_Z</CODE></TD> 64 <TD width="70%">Buffering using z-values</TD> 65 </TR> 66 <TR> 67 <TD width="30%"><CODE>GX_BUFFERMODE_W</CODE></TD> 68 <TD width="70%">Buffering using w-values (does not function normally if the <CODE><A href="G3_Ortho.html">G3_Ortho</A></CODE> function is used)</TD> 69 </TR> 70 </TBODY> 71</TABLE> 72<P>The following indicates the type definitions for <CODE>GXSortMode</CODE> and <CODE>GXBufferMode</CODE> types.</P> 73<PRE><CODE>typedef enum 74{ 75 GX_SORTMODE_AUTO = 0, 76 GX_SORTMODE_MANUAL = 1 77} 78GXSortMode; 79 80typedef enum 81{ 82 GX_BUFFERMODE_Z = 0, 83 GX_BUFFERMODE_W = 1 84} 85GXBufferMode;</CODE></PRE> 86<h2>See Also</h2> 87<H2>Revision History</H2> 88<P>2004/02/09</P> 89<UL> 90 <LI>Added a note. 91</UL> 92<P>2004/01/19 Initial version.</P> 93 94<hr><p>CONFIDENTIAL</p></body> 95</html> 96
