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7<title>nngxFilterBlockImage</title>
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10<h1><CODE>nngxFilterBlockImage</CODE> Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14NNGX_APICALL void NNGX_APIENTRY nngxFilterBlockImage(
15     const GLvoid * srcaddr,
16     GLvoid * dstaddr,
17     GLsizei width,
18     GLsizei height,
19     GLenum format
20);
21</pre>
22    </div>
23<h2>Arguments</h2>
24    <div class="section">
25      <table class="arguments">
26        <thead>
27          <tr>
28            <td width="15" />
29<th>Name</th>
30<td>Description</td>
31          </tr>
32        </thead>
33        <tr>
34<td>in</td>
35<th>srcaddr</th>
36<td>Transfer source block image address.</td>
37        </tr>
38        <tr>
39<td>in</td>
40<th>dstaddr</th>
41<td>Transfer destination address.</td>
42        </tr>
43        <tr>
44<td>in</td>
45<th>width</th>
46<td>Transfer source image width.</td>
47        </tr>
48        <tr>
49<td>in</td>
50<th>height</th>
51<td>Transfer source image height.</td>
52        </tr>
53        <tr>
54<td>in</td>
55<th>format</th>
56<td>Block image pixel format.</td>
57        </tr> </table>
58    </div>
59<h2>Return Values</h2>
60<div class="section">There is no return value. </div>
61<h2>Description</h2>
62    <div class="section">
63<p>Issues a command to antialias-filter and transfer a block image.</p><P>
64These antialias-filter and transfer commands for block images accumulate in the current command list. <I>Block images</I> are either rendered images or PICA native format textures that are in 8-block addressing format. This operation transfers the image from the address specified in <SPAN class="argument">srcaddr</SPAN> to the address specified in <SPAN class="argument">dstaddr</SPAN> while applying a 2x2 antialias filter. The <SPAN class="argument">srcaddr</SPAN> and <SPAN class="argument">dstaddr</SPAN> addresses must be 8-byte aligned. For <SPAN class="argument">width</SPAN> and <SPAN class="argument">height</SPAN>, specify the dimensions of the transfer source image in pixels.
65            </P><P>
66For <SPAN class="argument">format</SPAN>, specify one of the following pixel formats.
67<TABLE><TR><TH>GL_RGBA8_OES</TH><TD>RGBA8888, 32-bit</TD></TR><TR><TH>GL_RGB8_OES</TH><TD>RGB888, 24-bit</TD></TR><TR><TH>GL_RGBA4</TH><TD>RGBA4444, 16-bit</TD></TR><TR><TH>GL_RGB5_A1</TH><TD>RGBA5551, 16-bit</TD></TR><TR><TH>GL_RGB565</TH><TD>RGB565, 16-bit</TD></TR></TABLE></P><P>
68Depending on the <SPAN class="argument">format</SPAN>, there are restrictions on the possible settings for <SPAN class="argument">width</SPAN> and <SPAN class="argument">height</SPAN>. These are shown in the table below.
69<TABLE><TR><TD><B>format</B></TD><TD><B>width</B></TD><TD><B>height</B></TD></TR><TR><TD>GL_RGBA8_OES, GL_RGB8_OES</TD><TD>Must be a value of 64 or larger and a multiple of 64</TD><TD>Must be a value of 64 or larger and a multiple of 8</TD></TR><TR><TD>GL_RGBA4, GL_RGB5_A1, GL_RGB565</TD><TD>Must be a value of 128 or larger and a multiple of 128</TD><TD>Must be a value of 128 or larger and a multiple of 8</TD></TR></TABLE></P><P>
70The following errors occur with this function.
71<TABLE><TR><TH>GL_ERROR_8068_DMP</TH><TD>0 is bound to the current command list, or the command request queue size is insufficient.</TD></TR><TR><TH>GL_ERROR_8069_DMP</TH><TD><SPAN class="argument">srcaddr</SPAN> or <SPAN class="argument">dstaddr</SPAN> is not 8-byte aligned.</TD></TR><TR><TH>GL_ERROR_806A_DMP</TH><TD><SPAN class="argument">width</SPAN> or <SPAN class="argument">height</SPAN> violate the restrictions imposed upon them by the specified <SPAN class="argument">format</SPAN>.</TD></TR><TR><TH>GL_ERROR_806B_DMP</TH><TD>The <SPAN class="argument">format</SPAN> argument is set to an invalid value.</TD></TR></TABLE></P></div>
72<h2>Revision History</h2>
73    <div class="section">
74      <dl class="history">
75        <dt>2010/06/09</dt>
76<dd>Initial version.<br />
77        </dd>
78      </dl>
79    </div>
80  <hr><p>CONFIDENTIAL</p></body>
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