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7<title>SetAlpha</title>
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10<h1><CODE>nn::y2r::CTR::SetAlpha</CODE> Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14void SetAlpha(
15     s16 alpha
16);
17</pre>
18    </div>
19<h2>Arguments</h2>
20    <div class="section">
21      <table class="arguments">
22        <thead>
23          <tr>
24            <td width="15" />
25<th>Name</th>
26<td>Description</td>
27          </tr>
28        </thead>
29        <tr>
30<td>in</td>
31<th>alpha</th>
32<td>Specifies the alpha value.</td>
33        </tr> </table>
34    </div>
35<h2>Return Values</h2>
36    <div class="section">
37None.
38               </div>
39<h2>Description</h2>
40    <div class="section">
41<p>Sets the alpha value for a 32-bit RGB or RGB555 output format.</p><P>
42In the case of 32-bit RGB, the lower 8 bits of the configured alpha value are the valid bits. For that reason, values outside the limit of <CODE>0x00ff</CODE> are ignored.
43            </P><P>
44In the case of RGB555, the valid bit is the eighth bit of the configured alpha value. For that reason, you must provide a value of <CODE>0x0080</CODE> as opposed to <CODE>0x0001</CODE>.
45            </P></div>
46<h2>Revision History</h2>
47    <div class="section">
48      <dl class="history">
49        <dt>2010/05/13</dt>
50<dd>Added description of valid alpha values.<br />
51        </dd>
52        <dt>2010/01/07</dt>
53<dd>Initial version.<br />
54        </dd>
55      </dl>
56    </div>
57  <hr><p>CONFIDENTIAL</p></body>
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