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<li class="navelem"><a class="el" href="namespaceExiv2.html">Exiv2</a></li><li class="navelem"><a class="el" href="namespaceExiv2_1_1Internal.html">Internal</a></li><li class="navelem"><a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html">PngChunk</a></li> </ul>
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<a href="#pub-types">Public Types</a> |
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<div class="title">Exiv2::Internal::PngChunk Class Reference</div> </div>
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<p>Stateless parser class for data in PNG chunk format. Images use this class to decode and encode PNG-based data.
<a href="classExiv2_1_1Internal_1_1PngChunk.html#details">More...</a></p>
<p><code>#include <pngchunk_int.hpp></code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a9a05f1f7d1b88f8e869813f6b318fd35"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9a05f1f7d1b88f8e869813f6b318fd35"></a>enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#a9a05f1f7d1b88f8e869813f6b318fd35">TxtChunkType</a> { <b>tEXt_Chunk</b> = 0,
<b>zTXt_Chunk</b> = 1,
<b>iTXt_Chunk</b> = 2
}</td></tr>
<tr class="memdesc:a9a05f1f7d1b88f8e869813f6b318fd35"><td class="mdescLeft"> </td><td class="mdescRight">Text Chunk types. <br /></td></tr>
<tr class="separator:a9a05f1f7d1b88f8e869813f6b318fd35"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:a95c8bcca87e7e7b73466a024d36abdc2"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#a95c8bcca87e7e7b73466a024d36abdc2">decodeIHDRChunk</a> (const <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> &data, int *outWidth, int *outHeight)</td></tr>
<tr class="memdesc:a95c8bcca87e7e7b73466a024d36abdc2"><td class="mdescLeft"> </td><td class="mdescRight">Decode PNG IHDR chunk data from a data buffer <em>data</em> and return image size to <em>outWidth</em> and <em>outHeight</em>. <a href="#a95c8bcca87e7e7b73466a024d36abdc2">More...</a><br /></td></tr>
<tr class="separator:a95c8bcca87e7e7b73466a024d36abdc2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa0d25553b739b31d23f3c63f89f84dc7"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#aa0d25553b739b31d23f3c63f89f84dc7">decodeTXTChunk</a> (<a class="el" href="classExiv2_1_1Image.html">Image</a> *pImage, const <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> &data, <a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#a9a05f1f7d1b88f8e869813f6b318fd35">TxtChunkType</a> type)</td></tr>
<tr class="memdesc:aa0d25553b739b31d23f3c63f89f84dc7"><td class="mdescLeft"> </td><td class="mdescRight">Decode PNG tEXt, zTXt, or iTXt chunk data from <em>pImage</em> passed by data buffer <em>data</em> and extract Comment, Exif, Iptc, Xmp metadata accordingly. <a href="#aa0d25553b739b31d23f3c63f89f84dc7">More...</a><br /></td></tr>
<tr class="separator:aa0d25553b739b31d23f3c63f89f84dc7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a03608e8b2950d894bc52c8c0bca3df77"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#a03608e8b2950d894bc52c8c0bca3df77">keyTXTChunk</a> (const <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> &data, bool stripHeader=false)</td></tr>
<tr class="memdesc:a03608e8b2950d894bc52c8c0bca3df77"><td class="mdescLeft"> </td><td class="mdescRight">Return PNG TXT chunk key as data buffer. <a href="#a03608e8b2950d894bc52c8c0bca3df77">More...</a><br /></td></tr>
<tr class="separator:a03608e8b2950d894bc52c8c0bca3df77"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af11fcb9508b26ea787bfb539fc69d350"><td class="memItemLeft" align="right" valign="top">static std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#af11fcb9508b26ea787bfb539fc69d350">makeMetadataChunk</a> (const std::string &metadata, <a class="el" href="namespaceExiv2.html#acca494c8cf80f3ac8a804e1b54afffca">MetadataId</a> type)</td></tr>
<tr class="memdesc:af11fcb9508b26ea787bfb539fc69d350"><td class="mdescLeft"> </td><td class="mdescRight">Return a complete PNG chunk data compressed or not as buffer. Data returned is formated accordingly with metadata <em>type</em> to host passed by <em>metadata</em>. <a href="#af11fcb9508b26ea787bfb539fc69d350">More...</a><br /></td></tr>
<tr class="separator:af11fcb9508b26ea787bfb539fc69d350"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Stateless parser class for data in PNG chunk format. Images use this class to decode and encode PNG-based data. </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a class="anchor" id="a95c8bcca87e7e7b73466a024d36abdc2"></a>
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<td class="memname">void Exiv2::Internal::PngChunk::decodeIHDRChunk </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> & </td>
<td class="paramname"><em>data</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"><em>outWidth</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"><em>outHeight</em> </td>
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<td>)</td>
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<p>Decode PNG IHDR chunk data from a data buffer <em>data</em> and return image size to <em>outWidth</em> and <em>outHeight</em>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">data</td><td>PNG Chunk data buffer. </td></tr>
<tr><td class="paramname">outWidth</td><td>Integer pointer to be set to the width of the image. </td></tr>
<tr><td class="paramname">outHeight</td><td>Integer pointer to be set to the height of the image. </td></tr>
</table>
</dd>
</dl>
<p>References <a class="el" href="namespaceExiv2.html#aaaa13407701ef70800058a760e8be52e">Exiv2::getLong()</a>, and <a class="el" href="classExiv2_1_1DataBuf.html#a9a00173081c913d3add58854d9ad2c39">Exiv2::DataBuf::pData_</a>.</p>
<p>Referenced by <a class="el" href="classExiv2_1_1PngImage.html#a2a0f0ed945a729104c01a851094150e7">Exiv2::PngImage::readMetadata()</a>.</p>
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<td class="memname">void Exiv2::Internal::PngChunk::decodeTXTChunk </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classExiv2_1_1Image.html">Image</a> * </td>
<td class="paramname"><em>pImage</em>, </td>
</tr>
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<td></td>
<td class="paramtype">const <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> & </td>
<td class="paramname"><em>data</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#a9a05f1f7d1b88f8e869813f6b318fd35">TxtChunkType</a> </td>
<td class="paramname"><em>type</em> </td>
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<td>)</td>
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<p>Decode PNG tEXt, zTXt, or iTXt chunk data from <em>pImage</em> passed by data buffer <em>data</em> and extract Comment, Exif, Iptc, Xmp metadata accordingly. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pImage</td><td>Pointer to the image to hold the metadata </td></tr>
<tr><td class="paramname">data</td><td>PNG Chunk data buffer. </td></tr>
<tr><td class="paramname">type</td><td>PNG Chunk TXT type. </td></tr>
</table>
</dd>
</dl>
<p>References <a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#a03608e8b2950d894bc52c8c0bca3df77">keyTXTChunk()</a>, <a class="el" href="classExiv2_1_1DataBuf.html#a9a00173081c913d3add58854d9ad2c39">Exiv2::DataBuf::pData_</a>, <a class="el" href="classExiv2_1_1DataBuf.html#a5e6028d5cdae2e149749667cf66c3e91">Exiv2::DataBuf::size_</a>, and <a class="el" href="namespaceExiv2.html#a5153319711f35fe81cbc13f4b852450ca2d79fb07c9ec891f281968dad43c1e25">Exiv2::string</a>.</p>
<p>Referenced by <a class="el" href="classExiv2_1_1PngImage.html#a2a0f0ed945a729104c01a851094150e7">Exiv2::PngImage::readMetadata()</a>.</p>
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<td class="memname"><a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> Exiv2::Internal::PngChunk::keyTXTChunk </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> & </td>
<td class="paramname"><em>data</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">bool </td>
<td class="paramname"><em>stripHeader</em> = <code>false</code> </td>
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<td>)</td>
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<p>Return PNG TXT chunk key as data buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">data</td><td>PNG Chunk data buffer. </td></tr>
<tr><td class="paramname">stripHeader</td><td>Set true if chunk data start with header bytes, else false (default). </td></tr>
</table>
</dd>
</dl>
<p>References <a class="el" href="classExiv2_1_1DataBuf.html#a9a00173081c913d3add58854d9ad2c39">Exiv2::DataBuf::pData_</a>, and <a class="el" href="classExiv2_1_1DataBuf.html#a5e6028d5cdae2e149749667cf66c3e91">Exiv2::DataBuf::size_</a>.</p>
<p>Referenced by <a class="el" href="classExiv2_1_1Internal_1_1PngChunk.html#aa0d25553b739b31d23f3c63f89f84dc7">decodeTXTChunk()</a>.</p>
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<td class="memname">std::string Exiv2::Internal::PngChunk::makeMetadataChunk </td>
<td>(</td>
<td class="paramtype">const std::string & </td>
<td class="paramname"><em>metadata</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="namespaceExiv2.html#acca494c8cf80f3ac8a804e1b54afffca">MetadataId</a> </td>
<td class="paramname"><em>type</em> </td>
</tr>
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<td>)</td>
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<p>Return a complete PNG chunk data compressed or not as buffer. Data returned is formated accordingly with metadata <em>type</em> to host passed by <em>metadata</em>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">metadata</td><td>metadata buffer. </td></tr>
<tr><td class="paramname">type</td><td>metadata type. </td></tr>
</table>
</dd>
</dl>
<p>References <a class="el" href="namespaceExiv2.html#a5153319711f35fe81cbc13f4b852450ca2d79fb07c9ec891f281968dad43c1e25">Exiv2::string</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="pngchunk__int_8hpp.html">pngchunk_int.hpp</a></li>
<li>pngchunk.cpp</li>
</ul>
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