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<title>iipsrv: JPEGCompressor Class Reference</title>
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<div id="projectname">iipsrv
 <span id="projectnumber">1.1</span>
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<div id="projectbrief">iipsrv is an advanced high-performance feature-rich image server for web-based streamed viewing and zooming of ultra high-resolution images</div>
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<a href="#pub-methods">Public Member Functions</a> |
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<p>Wrapper class to the IJG JPEG library.
<a href="classJPEGCompressor.html#details">More...</a></p>
<p><code>#include <<a class="el" href="JPEGCompressor_8h_source.html">JPEGCompressor.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for JPEGCompressor:</div>
<div class="dyncontent">
<div class="center">
<img src="classJPEGCompressor.png" usemap="#JPEGCompressor_map" alt=""/>
<map id="JPEGCompressor_map" name="JPEGCompressor_map">
<area href="classCompressor.html" title="Base class for IIP output images. " alt="Compressor" shape="rect" coords="0,0,112,24"/>
</map>
</div></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a075720ce0e74f48b1d48498039da2539"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a075720ce0e74f48b1d48498039da2539">JPEGCompressor</a> (int quality)</td></tr>
<tr class="memdesc:a075720ce0e74f48b1d48498039da2539"><td class="mdescLeft"> </td><td class="mdescRight">Constructor. <a href="#a075720ce0e74f48b1d48498039da2539">More...</a><br /></td></tr>
<tr class="separator:a075720ce0e74f48b1d48498039da2539"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a60a3aa47f982f64374ccff5b073c0011"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a60a3aa47f982f64374ccff5b073c0011">setQuality</a> (int factor)</td></tr>
<tr class="memdesc:a60a3aa47f982f64374ccff5b073c0011"><td class="mdescLeft"> </td><td class="mdescRight">Set the compression quality. <a href="#a60a3aa47f982f64374ccff5b073c0011">More...</a><br /></td></tr>
<tr class="separator:a60a3aa47f982f64374ccff5b073c0011"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac747bb7eaf4c82a50b1ba5127d46eeaa"><td class="memItemLeft" align="right" valign="top"><a id="ac747bb7eaf4c82a50b1ba5127d46eeaa"></a>
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#ac747bb7eaf4c82a50b1ba5127d46eeaa">getQuality</a> ()</td></tr>
<tr class="memdesc:ac747bb7eaf4c82a50b1ba5127d46eeaa"><td class="mdescLeft"> </td><td class="mdescRight">Get the current quality level. <br /></td></tr>
<tr class="separator:ac747bb7eaf4c82a50b1ba5127d46eeaa"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a35af7be50cb146c028b5c09d378b54c0"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a35af7be50cb146c028b5c09d378b54c0">InitCompression</a> (const <a class="el" href="classRawTile.html">RawTile</a> &rawtile, unsigned int strip_height)</td></tr>
<tr class="memdesc:a35af7be50cb146c028b5c09d378b54c0"><td class="mdescLeft"> </td><td class="mdescRight">Initialise strip based compression. <a href="#a35af7be50cb146c028b5c09d378b54c0">More...</a><br /></td></tr>
<tr class="separator:a35af7be50cb146c028b5c09d378b54c0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a77dacb7508b13ca5985bb30de14680d7"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a77dacb7508b13ca5985bb30de14680d7">CompressStrip</a> (unsigned char *s, unsigned char *o, unsigned int tile_height)</td></tr>
<tr class="memdesc:a77dacb7508b13ca5985bb30de14680d7"><td class="mdescLeft"> </td><td class="mdescRight">Compress a strip of image data. <a href="#a77dacb7508b13ca5985bb30de14680d7">More...</a><br /></td></tr>
<tr class="separator:a77dacb7508b13ca5985bb30de14680d7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa1e096e2a3170221c36bd9a4ebf7b526"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#aa1e096e2a3170221c36bd9a4ebf7b526">Finish</a> (unsigned char *output)</td></tr>
<tr class="memdesc:aa1e096e2a3170221c36bd9a4ebf7b526"><td class="mdescLeft"> </td><td class="mdescRight">Finish the strip based compression and free memory. <a href="#aa1e096e2a3170221c36bd9a4ebf7b526">More...</a><br /></td></tr>
<tr class="separator:aa1e096e2a3170221c36bd9a4ebf7b526"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5f543bff5bfa528fdc5d6837f6553840"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a5f543bff5bfa528fdc5d6837f6553840">Compress</a> (<a class="el" href="classRawTile.html">RawTile</a> &t)</td></tr>
<tr class="memdesc:a5f543bff5bfa528fdc5d6837f6553840"><td class="mdescLeft"> </td><td class="mdescRight">Compress an entire buffer of image data at once in one command. <a href="#a5f543bff5bfa528fdc5d6837f6553840">More...</a><br /></td></tr>
<tr class="separator:a5f543bff5bfa528fdc5d6837f6553840"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a62fd19a3b193d907f796cc53d1fc8919"><td class="memItemLeft" align="right" valign="top"><a id="a62fd19a3b193d907f796cc53d1fc8919"></a>
unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a62fd19a3b193d907f796cc53d1fc8919">getHeaderSize</a> ()</td></tr>
<tr class="memdesc:a62fd19a3b193d907f796cc53d1fc8919"><td class="mdescLeft"> </td><td class="mdescRight">Return the JPEG header size. <br /></td></tr>
<tr class="separator:a62fd19a3b193d907f796cc53d1fc8919"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae8dd617d645caabaa5fad022a24331c2"><td class="memItemLeft" align="right" valign="top"><a id="ae8dd617d645caabaa5fad022a24331c2"></a>
unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#ae8dd617d645caabaa5fad022a24331c2">getHeader</a> ()</td></tr>
<tr class="memdesc:ae8dd617d645caabaa5fad022a24331c2"><td class="mdescLeft"> </td><td class="mdescRight">Return a pointer to the header itself. <br /></td></tr>
<tr class="separator:ae8dd617d645caabaa5fad022a24331c2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3068b12a9ed2935babbede68d4415a91"><td class="memItemLeft" align="right" valign="top"><a id="a3068b12a9ed2935babbede68d4415a91"></a>
const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a3068b12a9ed2935babbede68d4415a91">getMimeType</a> ()</td></tr>
<tr class="memdesc:a3068b12a9ed2935babbede68d4415a91"><td class="mdescLeft"> </td><td class="mdescRight">Return the JPEG mime type. <br /></td></tr>
<tr class="separator:a3068b12a9ed2935babbede68d4415a91"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a97df480d52621b38e7275c6ff7266498"><td class="memItemLeft" align="right" valign="top"><a id="a97df480d52621b38e7275c6ff7266498"></a>
const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classJPEGCompressor.html#a97df480d52621b38e7275c6ff7266498">getSuffix</a> ()</td></tr>
<tr class="memdesc:a97df480d52621b38e7275c6ff7266498"><td class="mdescLeft"> </td><td class="mdescRight">Return the image filename suffix. <br /></td></tr>
<tr class="separator:a97df480d52621b38e7275c6ff7266498"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_classCompressor"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classCompressor')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classCompressor.html">Compressor</a></td></tr>
<tr class="memitem:a70078e753e103bd4a642118d7412dd79 inherit pub_methods_classCompressor"><td class="memItemLeft" align="right" valign="top"><a id="a70078e753e103bd4a642118d7412dd79"></a>
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classCompressor.html#a70078e753e103bd4a642118d7412dd79">getQuality</a> ()</td></tr>
<tr class="memdesc:a70078e753e103bd4a642118d7412dd79 inherit pub_methods_classCompressor"><td class="mdescLeft"> </td><td class="mdescRight">Get the current quality level. <br /></td></tr>
<tr class="separator:a70078e753e103bd4a642118d7412dd79 inherit pub_methods_classCompressor"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af23c55b06260b6dd14b288bedf409b3b inherit pub_methods_classCompressor"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classCompressor.html#af23c55b06260b6dd14b288bedf409b3b">setICCProfile</a> (const std::string &profile)</td></tr>
<tr class="memdesc:af23c55b06260b6dd14b288bedf409b3b inherit pub_methods_classCompressor"><td class="mdescLeft"> </td><td class="mdescRight">Set the <a class="el" href="classICC.html" title="ICC Profile Command. ">ICC</a> profile. <a href="classCompressor.html#af23c55b06260b6dd14b288bedf409b3b">More...</a><br /></td></tr>
<tr class="separator:af23c55b06260b6dd14b288bedf409b3b inherit pub_methods_classCompressor"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afc78f825498b3a33380ef251d6a60f87 inherit pub_methods_classCompressor"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classCompressor.html#afc78f825498b3a33380ef251d6a60f87">setXMPMetadata</a> (const std::string &x)</td></tr>
<tr class="memdesc:afc78f825498b3a33380ef251d6a60f87 inherit pub_methods_classCompressor"><td class="mdescLeft"> </td><td class="mdescRight">Set XMP metadata. <a href="classCompressor.html#afc78f825498b3a33380ef251d6a60f87">More...</a><br /></td></tr>
<tr class="separator:afc78f825498b3a33380ef251d6a60f87 inherit pub_methods_classCompressor"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af62307978b22d731e345eff148cab268 inherit pub_methods_classCompressor"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classCompressor.html#af62307978b22d731e345eff148cab268">addXMPMetadata</a> (const std::string &m)</td></tr>
<tr class="memdesc:af62307978b22d731e345eff148cab268 inherit pub_methods_classCompressor"><td class="mdescLeft"> </td><td class="mdescRight">Add metadata to the image header. <a href="classCompressor.html#af62307978b22d731e345eff148cab268">More...</a><br /></td></tr>
<tr class="separator:af62307978b22d731e345eff148cab268 inherit pub_methods_classCompressor"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pro_attribs_classCompressor"><td colspan="2" onclick="javascript:toggleInherit('pro_attribs_classCompressor')"><img src="closed.png" alt="-"/> Protected Attributes inherited from <a class="el" href="classCompressor.html">Compressor</a></td></tr>
<tr class="memitem:a7a48db7e754ff8335485941f704a40a3 inherit pro_attribs_classCompressor"><td class="memItemLeft" align="right" valign="top"><a id="a7a48db7e754ff8335485941f704a40a3"></a>
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classCompressor.html#a7a48db7e754ff8335485941f704a40a3">Q</a></td></tr>
<tr class="memdesc:a7a48db7e754ff8335485941f704a40a3 inherit pro_attribs_classCompressor"><td class="mdescLeft"> </td><td class="mdescRight">Quality level. <br /></td></tr>
<tr class="separator:a7a48db7e754ff8335485941f704a40a3 inherit pro_attribs_classCompressor"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a788d5559f4276c1498cf9bcdca2d42cb inherit pro_attribs_classCompressor"><td class="memItemLeft" align="right" valign="top"><a id="a788d5559f4276c1498cf9bcdca2d42cb"></a>
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classCompressor.html#a788d5559f4276c1498cf9bcdca2d42cb">icc</a></td></tr>
<tr class="memdesc:a788d5559f4276c1498cf9bcdca2d42cb inherit pro_attribs_classCompressor"><td class="mdescLeft"> </td><td class="mdescRight"><a class="el" href="classICC.html" title="ICC Profile Command. ">ICC</a> Profile. <br /></td></tr>
<tr class="separator:a788d5559f4276c1498cf9bcdca2d42cb inherit pro_attribs_classCompressor"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a45698fa97911f4ecfe030c077c139c2b inherit pro_attribs_classCompressor"><td class="memItemLeft" align="right" valign="top"><a id="a45698fa97911f4ecfe030c077c139c2b"></a>
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classCompressor.html#a45698fa97911f4ecfe030c077c139c2b">xmp</a></td></tr>
<tr class="memdesc:a45698fa97911f4ecfe030c077c139c2b inherit pro_attribs_classCompressor"><td class="mdescLeft"> </td><td class="mdescRight">XMP metadata. <br /></td></tr>
<tr class="separator:a45698fa97911f4ecfe030c077c139c2b inherit pro_attribs_classCompressor"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Wrapper class to the IJG JPEG library. </p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="a075720ce0e74f48b1d48498039da2539"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a075720ce0e74f48b1d48498039da2539">◆ </a></span>JPEGCompressor()</h2>
<div class="memitem">
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<td class="memname">JPEGCompressor::JPEGCompressor </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>quality</em></td><td>)</td>
<td></td>
</tr>
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</div><div class="memdoc">
<p>Constructor. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">quality</td><td>JPEG Quality factor (0-100) </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a id="a5f543bff5bfa528fdc5d6837f6553840"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5f543bff5bfa528fdc5d6837f6553840">◆ </a></span>Compress()</h2>
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<td class="memname">unsigned int JPEGCompressor::Compress </td>
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<td class="paramtype"><a class="el" href="classRawTile.html">RawTile</a> & </td>
<td class="paramname"><em>t</em></td><td>)</td>
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<p>Compress an entire buffer of image data at once in one command. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">t</td><td>tile of image data </td></tr>
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<p>Reimplemented from <a class="el" href="classCompressor.html#af57b26b9e84ee92afa663324f464c3e0">Compressor</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a77dacb7508b13ca5985bb30de14680d7">◆ </a></span>CompressStrip()</h2>
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<td class="memname">unsigned int JPEGCompressor::CompressStrip </td>
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<td class="paramtype">unsigned char * </td>
<td class="paramname"><em>s</em>, </td>
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<td class="paramtype">unsigned char * </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>tile_height</em> </td>
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<p>Compress a strip of image data. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">s</td><td>source image data </td></tr>
<tr><td class="paramname">o</td><td>output buffer </td></tr>
<tr><td class="paramname">tile_height</td><td>pixel height of the tile we are compressing </td></tr>
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<p>Reimplemented from <a class="el" href="classCompressor.html#a24549398c73442cf45b81e5cdeaf27c0">Compressor</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#aa1e096e2a3170221c36bd9a4ebf7b526">◆ </a></span>Finish()</h2>
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<td class="memname">unsigned int JPEGCompressor::Finish </td>
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<td class="paramtype">unsigned char * </td>
<td class="paramname"><em>output</em></td><td>)</td>
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<p>Finish the strip based compression and free memory. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">output</td><td>output buffer </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>size of output generated </dd></dl>
<p>Reimplemented from <a class="el" href="classCompressor.html#a7a98fff52328aeea262452ee8949691d">Compressor</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a35af7be50cb146c028b5c09d378b54c0">◆ </a></span>InitCompression()</h2>
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<td class="memname">void JPEGCompressor::InitCompression </td>
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<td class="paramtype">const <a class="el" href="classRawTile.html">RawTile</a> & </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>strip_height</em> </td>
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<p>Initialise strip based compression. </p>
<p>If we are doing a strip based encoding, we need to first initialise with InitCompression, then compress a single strip at a time using CompressStrip and finally clean up using Finish </p><dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">rawtile</td><td>tile containing the image to be compressed </td></tr>
<tr><td class="paramname">strip_height</td><td>pixel height of the strip we want to compress </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>header size </dd></dl>
<p>Reimplemented from <a class="el" href="classCompressor.html#ad83402c75cd8f85c9263c1e990ae1e5f">Compressor</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a60a3aa47f982f64374ccff5b073c0011">◆ </a></span>setQuality()</h2>
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<td class="memname">void JPEGCompressor::setQuality </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>factor</em></td><td>)</td>
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<p>Set the compression quality. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">factor</td><td>Quality factor (0-100) </td></tr>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="JPEGCompressor_8h_source.html">JPEGCompressor.h</a></li>
</ul>
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