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7<title>SetViewport</title>
8  </head>
9  <body>
10<h1><CODE><a href="../../../../nn/Overview.html">nn</a>::<a href="../../../../nn/gd/Overview.html">gd</a>::<a href="../../../../nn/gd/CTR/Overview.html">CTR</a>::<a href="../../../../nn/gd/CTR/RasterizerStage/Overview.html">RasterizerStage</a>::SetViewport</CODE> Member Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14static void SetViewport(
15     <a href="../../../../nn/gd/CTR/Viewport/Overview.html">Viewport</a> & viewport
16);
17</pre>
18    </div>
19<h2>Parameters</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>viewport</th>
32<td>Specifies the viewport region.</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>Configures the viewport. This function is an immediate function. (<I>Immediate functions</I> directly generate commands and insert them into the command buffer.)</p><p>This is the format for the data inserted into the command buffer:<br /><CODE>0x00000000 Whalf <br /> 0x00000004 [Reserved] <br /> 0x00000008 W <br /> 0x0000000c Hhalf <br /> 0x00000010 H <br /> 0x00000014 [Reserved] <br /> 0x00000018 XY <br /> 0x0000001c [Reserved] </CODE><br /><br /> The values for <CODE>Whalf</CODE>, <CODE>W</CODE> and <CODE>XY</CODE> are calculated as follows:<br /><CODE>Whalf = <a href="../../../../nn/gd/CTR/Utils/Float32ToFloat24.html">Utils::Float32ToFloat24</a>(viewport.m_Width * 0.5f),<br /> Hhalf = <a href="../../../../nn/gd/CTR/Utils/Float32ToFloat24.html">Utils::Float32ToFloat24</a>(viewport.m_Height * 0.5f) <br /><br /> W = <a href="../../../../nn/gd/CTR/Utils/Float32ToFloat31.html">Utils::Float32ToFloat31</a>(2.f / viewport.m_Width) &lt;&lt; 1, <br />H = <a href="../../../../nn/gd/CTR/Utils/Float32ToFloat31.html">Utils::Float32ToFloat31</a>(2.f / viewport.m_Height) &lt;&lt; 1 <br /><br /> XY = viewport.m_X | (viewport.m_Y &lt;&lt; 16) <br /></CODE></p><p>The default value is a Viewport set to (0, 0, 240, 320).</p></div>
42<h2>See Also</h2>
43    <div class="section">
44<p class="reference"><CODE><a href="../../../../nn/gd/CTR/Utils/Float32ToFloat24.html">Utils::Float32ToFloat24</a><br /><a href="../../../../nn/gd/CTR/Utils/Float32ToFloat31.html">Utils::Float32ToFloat31</a><br /></CODE> </p>
45    </div>
46<h2>Revision History</h2>
47    <div class="section">
48      <dl class="history">
49        <dt>2011/07/13</dt>
50<dd>Added the default value.<BR>
51        </dd>
52        <dt>2011/02/17</dt>
53<dd>Initial version.<br />
54        </dd>
55      </dl>
56    </div>
57  <hr><p>CONFIDENTIAL</p></body>
58</html>
59