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7<title>GetMpIndex</title>
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10<h1><CODE>nn::jpeg::CTR::JpegMpDecoder::GetMpIndex</CODE> Member Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">#include &lt;nn/jpeg.h&gt;
14bool GetMpIndex(
15     <a href="../../../../nn/jpeg/CTR/MpIndex/Overview.html">MpIndex</a> * pIndex,
16     const u8 * src,
17     size_t srcSize
18);
19</pre>
20    </div>
21<h2>Arguments</h2>
22    <div class="section">
23      <table class="arguments">
24        <thead>
25          <tr>
26            <td width="15" />
27<th>Name</th>
28<td>Description</td>
29          </tr>
30        </thead>
31        <tr>
32<td>out</td>
33<th>pIndex</th>
34<td>Specifies the buffer storing the MP Index IFD.<br />The stored data has been converted to a format that is easier for the library to process, and thus the binary representation of a stored MP Index IFD differs from that of the original data.</td>
35        </tr>
36        <tr>
37<td>in</td>
38<th>src</th>
39<td>Specifies the start of the MP-format data.<br />The MP Index IFD only exists in the starting image, so specify the starting image here.</td>
40        </tr>
41        <tr>
42<td>in</td>
43<th>srcSize</th>
44<td>Specifies the size of <SPAN class="argument">src</SPAN> in bytes.</td>
45        </tr> </table>
46    </div>
47<h2>Return Values</h2>
48<div class="section">Returns <CODE>true</CODE> on success. Returns <CODE>false</CODE> on failure.<br />Use the <CODE><a href="../../../../nn/jpeg/CTR/JpegMpEncoder/GetLastError.html">GetLastError</a></CODE> function to get the reason for failure. </div>
49<h2>Description</h2>
50    <div class="section">
51<p>Gets the MP Index IFD included in the data stored in MP format.</p><p>Obtained MP index IFDs (image file directories) are accessed using functions such as <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetMpEntry.html">GetMpEntry</a></CODE> or <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetMpAttribute.html">GetMpAttribute</a></CODE>. The region specified by the src and srcSize arguments must not be destroyed until the obtained MP index IFDs are no longer needed.</p><p>This function only partially performs decoding and shared processing. Consequently, there are some functions you cannot call immediately after calling this function: the <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetLastWidth.html">GetLastWidth</a></CODE>, <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetLastHeight.html">GetLastHeight</a></CODE>, <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetLastOutputBufferWidth.html">GetLastOutputBufferWidth</a></CODE>, and <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetLastOutputBufferHeight.html">GetLastOutputBufferHeight</a></CODE> functions, and all functions that get EXIF information, such as the <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetLastDateTime.html">GetLastDateTime</a></CODE> function. Calls to these functions will have undefined return values.</p><!-- write here --></div>
52<h2>Revision History</h2>
53    <div class="section">
54      <dl class="history">
55        <dt>2010/10/22</dt>
56<dd>Corrected an error.<br />
57        </dd>
58        <dt>2010/06/14</dt>
59<dd>Initial version.<br />
60        </dd>
61      </dl>
62    </div>
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