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13
14<h1 align="left">pix-a-comp</h1>
15
16
17
18<h2>Description</h2>
19
20<P>This program shows the alpha-compare function on the Pixel Engine. The TV screen contains four subscreens. Each can display a different alpha-compare method.</P>
21<h2>Coverage</h2>
22
23<p>Alpha-compare function.</p>
24<TABLE border="1" cellpadding="3" cellspacing="0.1" width="640">
25  <tr>
26<TD width="30%" bgcolor="#C0C0C0"><em><strong>Functions</strong></em></TD>
27<TD width="25%" bgcolor="#C0C0C0"><em><strong>Parameters</strong></em></TD>
28<TD width="45%" bgcolor="#C0C0C0"><em><strong>Description</strong></em></TD>
29    </tr>
30  <tr>
31<TD width="30%" rowspan="5"><code><A href="../../../gx/Tev/GXSetAlphaCompare.html">GXSetAlphaCompare</A></code></TD>
32<TD width="25%"><font face="Courier New"><em><strong><STRONG><EM><CODE>comp0</CODE></EM></STRONG></strong></em></font></TD>
33<TD width="45%"><SPAN>Can be changed interactively.</SPAN></TD>
34    </tr>
35  <tr>
36<TD width="25%"><font face="Courier New"><em><strong><STRONG><EM><CODE>ref0</CODE></EM></STRONG></strong></em></font></TD>
37<TD width="45%"><SPAN>Can be changed interactively.</SPAN></TD>
38    </tr>
39  <tr>
40<TD width="25%"><font face="Courier New"><em><strong><STRONG><EM><CODE>op</CODE></EM></STRONG></strong></em></font></TD>
41<TD width="45%"><SPAN>Can be changed interactively (on the actual hardware only). </SPAN></TD>
42    </tr>
43  <tr>
44<TD width="25%"><font face="Courier New"><em><strong><STRONG><EM><CODE>comp1</CODE></EM></STRONG></strong></em></font></TD>
45<TD width="45%"><SPAN>Can be changed interactively (on the actual hardware only). </SPAN></TD>
46    </tr>
47  <tr>
48<TD width="25%"><font face="Courier New"><em><strong><STRONG><EM><CODE>ref1</CODE></EM></STRONG></strong></em></font></TD>
49<TD width="45%"><SPAN>Can be changed interactively (on the actual hardware only). </SPAN></TD>
50    </tr>
51</TABLE>
52<h2>Operation Method</h2>
53
54<P>The A Button toggles the catalog/zoom up mode.</P>
55<ul>
56<li>In catalog mode, the joystick moves the cursor to select the subscreen.</li>
57<li>In zoom up mode, the joystick moves the cursor to change alpha compare settings.</li>
58</ul>
59
60<p>PAUSE exits the test.</p>
61
62<h2>Snapshot</h2>
63
64<P>Alpha-compare mode of <CODE>NEVER</CODE>, <CODE>LESS</CODE>, <CODE>LESS OR EQUAL</CODE>, and <CODE>EQUAL</CODE>.</P>
65<P><IMG src="./images/pix-a-comp-1.gif" alt="pix-a-comp-1.gif (7081 bytes)" width="642" height="482"></p>
66
67<P>Alpha-compare mode of <CODE>NOT EQUAL</CODE>, <CODE>GREATER OR EQUAL</CODE>, <CODE>GREATER</CODE> and <CODE>ALWAYS</CODE>.</P>
68<P><IMG src="./images/pix-a-comp-2.gif" alt="pix-a-comp-2.gif (8548 bytes)" width="642" height="481"></p>
69
70<h2>Required Data Files</h2>
71
72<p>None.</p>
73<H2>Revision History</H2>
74<P>03/01/2006 Initial version.</P>
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