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  • Author : DRC
    Date : 2024-09-14 11:56:14
    Hash : 9b01f5a0
    Message : TJ: Add func/method for computing xformed buf size

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  <div class="headertitle"><div class="title">tjregion Struct Reference<div class="ingroups"><a class="el" href="group___turbo_j_p_e_g.html">TurboJPEG</a></div></div></div>
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<p>Cropping region.  
 <a href="structtjregion.html#details">More...</a></p>

<p><code>#include &lt;turbojpeg.h&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-attribs" name="pub-attribs"></a>
Data Fields</h2></td></tr>
<tr class="memitem:a4b6a37a93997091b26a75831fa291ad9" id="r_a4b6a37a93997091b26a75831fa291ad9"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtjregion.html#a4b6a37a93997091b26a75831fa291ad9">x</a></td></tr>
<tr class="memdesc:a4b6a37a93997091b26a75831fa291ad9"><td class="mdescLeft">&#160;</td><td class="mdescRight">The left boundary of the cropping region.  <br /></td></tr>
<tr class="separator:a4b6a37a93997091b26a75831fa291ad9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7b3e0c24cfe87acc80e334cafdcf22c2" id="r_a7b3e0c24cfe87acc80e334cafdcf22c2"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtjregion.html#a7b3e0c24cfe87acc80e334cafdcf22c2">y</a></td></tr>
<tr class="memdesc:a7b3e0c24cfe87acc80e334cafdcf22c2"><td class="mdescLeft">&#160;</td><td class="mdescRight">The upper boundary of the cropping region.  <br /></td></tr>
<tr class="separator:a7b3e0c24cfe87acc80e334cafdcf22c2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab6eb73ceef584fc23c8c8097926dce42" id="r_ab6eb73ceef584fc23c8c8097926dce42"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtjregion.html#ab6eb73ceef584fc23c8c8097926dce42">w</a></td></tr>
<tr class="memdesc:ab6eb73ceef584fc23c8c8097926dce42"><td class="mdescLeft">&#160;</td><td class="mdescRight">The width of the cropping region.  <br /></td></tr>
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<tr class="memitem:aecefc45a26f4d8b60dd4d825c1710115" id="r_aecefc45a26f4d8b60dd4d825c1710115"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtjregion.html#aecefc45a26f4d8b60dd4d825c1710115">h</a></td></tr>
<tr class="memdesc:aecefc45a26f4d8b60dd4d825c1710115"><td class="mdescLeft">&#160;</td><td class="mdescRight">The height of the cropping region.  <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Cropping region. </p>
</div><h2 class="groupheader">Field Documentation</h2>
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<p>The height of the cropping region. </p>
<p>Setting this to 0 is the equivalent of setting it to the height of the source JPEG image - y. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#ab6eb73ceef584fc23c8c8097926dce42">&#9670;&#160;</a></span>w</h2>

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<p>The width of the cropping region. </p>
<p>Setting this to 0 is the equivalent of setting it to the width of the source JPEG image - x. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a4b6a37a93997091b26a75831fa291ad9">&#9670;&#160;</a></span>x</h2>

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<p>The left boundary of the cropping region. </p>
<p>For lossless transformation, this must be evenly divisible by the iMCU width (see <a class="el" href="group___turbo_j_p_e_g.html#ga9e61e7cd47a15a173283ba94e781308c" title="iMCU width (in pixels) for a given level of chrominance subsampling">tjMCUWidth</a>) of the destination image. For decompression, this must be evenly divisible by the scaled iMCU width of the source image. </p>

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<p>The upper boundary of the cropping region. </p>
<p>For lossless transformation, this must be evenly divisible by the iMCU height (see <a class="el" href="group___turbo_j_p_e_g.html#gabd247bb9fecb393eca57366feb8327bf" title="iMCU height (in pixels) for a given level of chrominance subsampling">tjMCUHeight</a>) of the destination image. </p>

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<hr/>The documentation for this struct was generated from the following file:<ul>
<li><b>turbojpeg.h</b></li>
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