1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2<html xml:lang="en-US" lang="en-US" xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <meta http-equiv="Content-Style-Type" content="text/css" /> 6 <link rel="stylesheet" href="../../../../css/manpage.css" type="text/css" /> 7<title>GetMpRegionsToBuildJpegData</title> 8 </head> 9 <body> 10<h1><CODE>nn::jpeg::CTR::JpegMpDecoder::GetMpRegionsToBuildJpegData</CODE> Member Function</h1> 11<h2>Syntax</h2> 12 <div class="section"> 13 <pre class="definition">#include <nn/jpeg.h> 14bool GetMpRegionsToBuildJpegData( 15 <a href="../../../../nn/jpeg/CTR/MpRegionsToBuildJpegData/Overview.html">MpRegionsToBuildJpegData</a> * pBuffer, 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>pBuffer</th> 34<td>Specifies the buffer that stores the region information.</td> 35 </tr> 36 <tr> 37<td>in</td> 38<th>src</th> 39<td>Specifies the start of the individual image data.</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>This function gets region information required to rebuild JPEG data from the individual image data stored in MP format.</p><p>Simply put, individual image data in MP format has this structure: [(JPEG header) + (APP2) + (JPEG data)], where APP2 includes the information associated with MP format. Leave out APP2 and you get [(JPEG header) + (JPEG data)], which is JPEG data not in the MP format. This function gets pointers and byte sizes for the (JPEG header) and (JPEG data) memory regions.</p><p>Generally, [pointer to starting image + return value of <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetMpImageOffset.html">GetMpImageOffset</a></CODE>] is returned in the <SPAN class="argument">src</SPAN> argument, and the return value of <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetMpImageSize.html">GetMpImageSize</a></CODE> is returned in the <SPAN class="argument">srcSize</SPAN> argument. Confirm beforehand that the region specified by <SPAN class="argument">src</SPAN> and <SPAN class="argument">srcSize</SPAN> is a valid region.</p><p>This function will fail if the MP type (<a href="../../../../nn/jpeg/CTR/MpTypeCode.html">MpTypeCode</a>) of the individual image is <a href="../../../../nn/jpeg/CTR/MpTypeCode.html">MP_TYPE_CODE_LARGE_THUMBNAIL_IMAGE_CLASS_1</a> or <a href="../../../../nn/jpeg/CTR/MpTypeCode.html">MP_TYPE_CODE_LARGE_THUMBNAIL_IMAGE_CLASS_2</a>, because these types of images are for display on monitors and do not include MP format-related information. Exif information might be omitted from images for display on monitors, so it is not suitable for use in rebuilding the JPEG data.</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>2010/10/21</dt> 56<dd>Initial version.<br /> 57 </dd> 58 </dl> 59 </div> 60 <hr><p>CONFIDENTIAL</p></body> 61</html> 62