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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Exiv2: Exiv2::Thumbnail Class Reference</title>
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<a class="el" href="namespaceExiv2.html">Exiv2</a>::<a class="el" href="classExiv2_1_1Thumbnail.html">Thumbnail</a></div>
<h1>Exiv2::Thumbnail Class Reference</h1><!-- doxytag: class="Exiv2::Thumbnail" -->Exif Thumbnail image. This abstract base class provides the interface for the thumbnail image that is optionally embedded in the Exif data. This class is used internally by <a class="el" href="classExiv2_1_1ExifData.html">ExifData</a>, it is probably not useful for a client as a standalone class. Instead, use an instance of <a class="el" href="classExiv2_1_1ExifData.html">ExifData</a> to access the Exif thumbnail image.
<a href="#_details">More...</a>
<p>
<code>#include <exif.hpp></code>
<p>
Inheritance diagram for Exiv2::Thumbnail:<p><center><img src="classExiv2_1_1Thumbnail__inherit__graph.png" border="0" usemap="#Exiv2_1_1Thumbnail__inherit__map" alt="Inheritance graph"></center>
<map name="Exiv2_1_1Thumbnail__inherit__map">
<area href="classExiv2_1_1JpegThumbnail.html" shape="rect" coords="5,81,157,105" alt="">
<area href="classExiv2_1_1TiffThumbnail.html" shape="rect" coords="181,81,323,105" alt="">
</map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="classExiv2_1_1Thumbnail-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="cf289890ffef7268ca3d7bfdb8123676"></a><!-- doxytag: member="Exiv2::Thumbnail::AutoPtr" ref="cf289890ffef7268ca3d7bfdb8123676" args="" -->
typedef std::auto_ptr< <a class="el" href="classExiv2_1_1Thumbnail.html">Thumbnail</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Thumbnail.html#cf289890ffef7268ca3d7bfdb8123676">AutoPtr</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Shortcut for a Thumbnail auto pointer. <br></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Creators</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="dfd99617058e36f1aa9693771b63df86"></a><!-- doxytag: member="Exiv2::Thumbnail::~Thumbnail" ref="dfd99617058e36f1aa9693771b63df86" args="()" -->
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Thumbnail.html#dfd99617058e36f1aa9693771b63df86">~Thumbnail</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Virtual destructor. <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Accessors</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Thumbnail.html#32376c5de38c9426e0637d3e8b681c4d">setDataArea</a> (<a class="el" href="classExiv2_1_1ExifData.html">ExifData</a> &exifData, <a class="el" href="classExiv2_1_1Ifd.html">Ifd</a> *pIfd1, const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> *buf, long len) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the image data as data area of the appropriate Exif metadatum. Read the thumbnail image data from data buffer <em>buf</em>. Return 0 if successful. <a href="#32376c5de38c9426e0637d3e8b681c4d"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7608ba2e95e7e46859df9cd84f79ddc3"></a><!-- doxytag: member="Exiv2::Thumbnail::copy" ref="7608ba2e95e7e46859df9cd84f79ddc3" args="(const ExifData &exifData) const =0" -->
virtual <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Thumbnail.html#7608ba2e95e7e46859df9cd84f79ddc3">copy</a> (const <a class="el" href="classExiv2_1_1ExifData.html">ExifData</a> &exifData) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the thumbnail image in a DataBuf. The caller owns the data buffer and DataBuf ensures that it will be deleted. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e069028a96300509c73142e0b8266eaf"></a><!-- doxytag: member="Exiv2::Thumbnail::format" ref="e069028a96300509c73142e0b8266eaf" args="() const =0" -->
virtual const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Thumbnail.html#e069028a96300509c73142e0b8266eaf">format</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return a short string for the format of the thumbnail ("TIFF", "JPEG"). <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="99a06f75360dbb240d58af97c4c39f35"></a><!-- doxytag: member="Exiv2::Thumbnail::extension" ref="99a06f75360dbb240d58af97c4c39f35" args="() const =0" -->
virtual const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Thumbnail.html#99a06f75360dbb240d58af97c4c39f35">extension</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the file extension for the format of the thumbnail (".tif", ".jpg"). <br></td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Manipulators</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0934137b3f1caf9eed39dde5854f6e76"></a><!-- doxytag: member="Exiv2::Thumbnail::operator=" ref="0934137b3f1caf9eed39dde5854f6e76" args="(const Thumbnail &rhs)" -->
<a class="el" href="classExiv2_1_1Thumbnail.html">Thumbnail</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Thumbnail.html#0934137b3f1caf9eed39dde5854f6e76">operator=</a> (const <a class="el" href="classExiv2_1_1Thumbnail.html">Thumbnail</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Assignment operator. Protected so that it can only be used by subclasses but not directly. <br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Exif Thumbnail image. This abstract base class provides the interface for the thumbnail image that is optionally embedded in the Exif data. This class is used internally by <a class="el" href="classExiv2_1_1ExifData.html">ExifData</a>, it is probably not useful for a client as a standalone class. Instead, use an instance of <a class="el" href="classExiv2_1_1ExifData.html">ExifData</a> to access the Exif thumbnail image.
<p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="32376c5de38c9426e0637d3e8b681c4d"></a><!-- doxytag: member="Exiv2::Thumbnail::setDataArea" ref="32376c5de38c9426e0637d3e8b681c4d" args="(ExifData &exifData, Ifd *pIfd1, const byte *buf, long len) const =0" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
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<td class="md" nowrap valign="top">virtual int Exiv2::Thumbnail::setDataArea </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="classExiv2_1_1ExifData.html">ExifData</a> & </td>
<td class="mdname" nowrap> <em>exifData</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap><a class="el" href="classExiv2_1_1Ifd.html">Ifd</a> * </td>
<td class="mdname" nowrap> <em>pIfd1</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td>
<td class="mdname" nowrap> <em>buf</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>long </td>
<td class="mdname" nowrap> <em>len</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"> const<code> [pure virtual]</code></td>
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</td>
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<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Set the image data as data area of the appropriate Exif metadatum. Read the thumbnail image data from data buffer <em>buf</em>. Return 0 if successful.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>exifData</em> </td><td>Exif data corresponding to the data buffer. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>pIfd1</em> </td><td>Corresponding raw IFD1. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>buf</em> </td><td>Data buffer containing the thumbnail data. The buffer must start with the TIFF header. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>len</em> </td><td>Number of bytes in the data buffer. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>0 if successful;<br>
1 in case of inconsistent thumbnail Exif data; or<br>
2 if the data area is outside of the data buffer </dd></dl>
<p>
Implemented in <a class="el" href="classExiv2_1_1TiffThumbnail.html#8b61502c88dee78609c6845d7d239b4b">Exiv2::TiffThumbnail</a>, and <a class="el" href="classExiv2_1_1JpegThumbnail.html#55e40a0898fefecc69e130019707b07c">Exiv2::JpegThumbnail</a>. </td>
</tr>
</table>
<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="exif_8hpp.html">exif.hpp</a></ul>
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