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group___turbo_j_p_e_g.html
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group___turbo_j_p_e_g.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>TurboJPEG: TurboJPEG</title>
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<div id="projectname">TurboJPEG
 <span id="projectnumber">2.1</span>
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<div class="header">
<div class="summary">
<a href="#nested-classes">Data Structures</a> |
<a href="#define-members">Macros</a> |
<a href="#typedef-members">Typedefs</a> |
<a href="#enum-members">Enumerations</a> |
<a href="#func-members">Functions</a> |
<a href="#var-members">Variables</a> </div>
<div class="headertitle">
<div class="title">TurboJPEG</div> </div>
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<div class="contents">
<p>TurboJPEG API.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structtjscalingfactor.html">tjscalingfactor</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Scaling factor. <a href="structtjscalingfactor.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structtjregion.html">tjregion</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Cropping region. <a href="structtjregion.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structtjtransform.html">tjtransform</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Lossless transform. <a href="structtjtransform.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:ga5ef3d169162ce77ce348e292a0b7477c"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga5ef3d169162ce77ce348e292a0b7477c">TJ_NUMSAMP</a></td></tr>
<tr class="memdesc:ga5ef3d169162ce77ce348e292a0b7477c"><td class="mdescLeft"> </td><td class="mdescRight">The number of chrominance subsampling options. <a href="group___turbo_j_p_e_g.html#ga5ef3d169162ce77ce348e292a0b7477c">More...</a><br /></td></tr>
<tr class="separator:ga5ef3d169162ce77ce348e292a0b7477c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga7010a4402f54a45ba822ad8675a4655e"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga7010a4402f54a45ba822ad8675a4655e">TJ_NUMPF</a></td></tr>
<tr class="memdesc:ga7010a4402f54a45ba822ad8675a4655e"><td class="mdescLeft"> </td><td class="mdescRight">The number of pixel formats. <a href="group___turbo_j_p_e_g.html#ga7010a4402f54a45ba822ad8675a4655e">More...</a><br /></td></tr>
<tr class="separator:ga7010a4402f54a45ba822ad8675a4655e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga39f57a6fb02d9cf32e7b6890099b5a71"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga39f57a6fb02d9cf32e7b6890099b5a71">TJ_NUMCS</a></td></tr>
<tr class="memdesc:ga39f57a6fb02d9cf32e7b6890099b5a71"><td class="mdescLeft"> </td><td class="mdescRight">The number of JPEG colorspaces. <a href="group___turbo_j_p_e_g.html#ga39f57a6fb02d9cf32e7b6890099b5a71">More...</a><br /></td></tr>
<tr class="separator:ga39f57a6fb02d9cf32e7b6890099b5a71"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga72ecf4ebe6eb702d3c6f5ca27455e1ec"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga72ecf4ebe6eb702d3c6f5ca27455e1ec">TJFLAG_BOTTOMUP</a></td></tr>
<tr class="memdesc:ga72ecf4ebe6eb702d3c6f5ca27455e1ec"><td class="mdescLeft"> </td><td class="mdescRight">The uncompressed source/destination image is stored in bottom-up (Windows, OpenGL) order, not top-down (X11) order. <a href="group___turbo_j_p_e_g.html#ga72ecf4ebe6eb702d3c6f5ca27455e1ec">More...</a><br /></td></tr>
<tr class="separator:ga72ecf4ebe6eb702d3c6f5ca27455e1ec"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga4ee4506c81177a06f77e2504a22efd2d"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga4ee4506c81177a06f77e2504a22efd2d">TJFLAG_FASTUPSAMPLE</a></td></tr>
<tr class="memdesc:ga4ee4506c81177a06f77e2504a22efd2d"><td class="mdescLeft"> </td><td class="mdescRight">When decompressing an image that was compressed using chrominance subsampling, use the fastest chrominance upsampling algorithm available in the underlying codec. <a href="group___turbo_j_p_e_g.html#ga4ee4506c81177a06f77e2504a22efd2d">More...</a><br /></td></tr>
<tr class="separator:ga4ee4506c81177a06f77e2504a22efd2d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga8808d403c68b62aaa58a4c1e58e98963"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga8808d403c68b62aaa58a4c1e58e98963">TJFLAG_NOREALLOC</a></td></tr>
<tr class="memdesc:ga8808d403c68b62aaa58a4c1e58e98963"><td class="mdescLeft"> </td><td class="mdescRight">Disable buffer (re)allocation. <a href="group___turbo_j_p_e_g.html#ga8808d403c68b62aaa58a4c1e58e98963">More...</a><br /></td></tr>
<tr class="separator:ga8808d403c68b62aaa58a4c1e58e98963"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaabce235db80d3f698b27f36cbd453da2"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gaabce235db80d3f698b27f36cbd453da2">TJFLAG_FASTDCT</a></td></tr>
<tr class="memdesc:gaabce235db80d3f698b27f36cbd453da2"><td class="mdescLeft"> </td><td class="mdescRight">Use the fastest DCT/IDCT algorithm available in the underlying codec. <a href="group___turbo_j_p_e_g.html#gaabce235db80d3f698b27f36cbd453da2">More...</a><br /></td></tr>
<tr class="separator:gaabce235db80d3f698b27f36cbd453da2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gacb233cfd722d66d1ccbf48a7de81f0e0"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gacb233cfd722d66d1ccbf48a7de81f0e0">TJFLAG_ACCURATEDCT</a></td></tr>
<tr class="memdesc:gacb233cfd722d66d1ccbf48a7de81f0e0"><td class="mdescLeft"> </td><td class="mdescRight">Use the most accurate DCT/IDCT algorithm available in the underlying codec. <a href="group___turbo_j_p_e_g.html#gacb233cfd722d66d1ccbf48a7de81f0e0">More...</a><br /></td></tr>
<tr class="separator:gacb233cfd722d66d1ccbf48a7de81f0e0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga519cfa4ef6c18d9e5b455fdf59306a3a"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga519cfa4ef6c18d9e5b455fdf59306a3a">TJFLAG_STOPONWARNING</a></td></tr>
<tr class="memdesc:ga519cfa4ef6c18d9e5b455fdf59306a3a"><td class="mdescLeft"> </td><td class="mdescRight">Immediately discontinue the current compression/decompression/transform operation if the underlying codec throws a warning (non-fatal error). <a href="group___turbo_j_p_e_g.html#ga519cfa4ef6c18d9e5b455fdf59306a3a">More...</a><br /></td></tr>
<tr class="separator:ga519cfa4ef6c18d9e5b455fdf59306a3a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga43b426750b46190a25d34a67ef76df1b"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga43b426750b46190a25d34a67ef76df1b">TJFLAG_PROGRESSIVE</a></td></tr>
<tr class="memdesc:ga43b426750b46190a25d34a67ef76df1b"><td class="mdescLeft"> </td><td class="mdescRight">Use progressive entropy coding in JPEG images generated by the compression and transform functions. <a href="group___turbo_j_p_e_g.html#ga43b426750b46190a25d34a67ef76df1b">More...</a><br /></td></tr>
<tr class="separator:ga43b426750b46190a25d34a67ef76df1b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga163e6482dc5096831feef9c79ff3f805"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga163e6482dc5096831feef9c79ff3f805">TJFLAG_LIMITSCANS</a></td></tr>
<tr class="memdesc:ga163e6482dc5096831feef9c79ff3f805"><td class="mdescLeft"> </td><td class="mdescRight">Limit the number of progressive JPEG scans that the decompression and transform functions will process. <a href="group___turbo_j_p_e_g.html#ga163e6482dc5096831feef9c79ff3f805">More...</a><br /></td></tr>
<tr class="separator:ga163e6482dc5096831feef9c79ff3f805"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga79bde1b4a3e2351e00887e47781b966e"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga79bde1b4a3e2351e00887e47781b966e">TJ_NUMERR</a></td></tr>
<tr class="memdesc:ga79bde1b4a3e2351e00887e47781b966e"><td class="mdescLeft"> </td><td class="mdescRight">The number of error codes. <a href="group___turbo_j_p_e_g.html#ga79bde1b4a3e2351e00887e47781b966e">More...</a><br /></td></tr>
<tr class="separator:ga79bde1b4a3e2351e00887e47781b966e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga0f6dbd18adf38b7d46ac547f0f4d562c"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga0f6dbd18adf38b7d46ac547f0f4d562c">TJ_NUMXOP</a></td></tr>
<tr class="memdesc:ga0f6dbd18adf38b7d46ac547f0f4d562c"><td class="mdescLeft"> </td><td class="mdescRight">The number of transform operations. <a href="group___turbo_j_p_e_g.html#ga0f6dbd18adf38b7d46ac547f0f4d562c">More...</a><br /></td></tr>
<tr class="separator:ga0f6dbd18adf38b7d46ac547f0f4d562c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga50e03cb5ed115330e212417429600b00"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00">TJXOPT_PERFECT</a></td></tr>
<tr class="memdesc:ga50e03cb5ed115330e212417429600b00"><td class="mdescLeft"> </td><td class="mdescRight">This option will cause <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> to return an error if the transform is not perfect. <a href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00">More...</a><br /></td></tr>
<tr class="separator:ga50e03cb5ed115330e212417429600b00"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga319826b7eb1583c0595bbe7b95428709"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga319826b7eb1583c0595bbe7b95428709">TJXOPT_TRIM</a></td></tr>
<tr class="memdesc:ga319826b7eb1583c0595bbe7b95428709"><td class="mdescLeft"> </td><td class="mdescRight">This option will cause <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> to discard any partial MCU blocks that cannot be transformed. <a href="group___turbo_j_p_e_g.html#ga319826b7eb1583c0595bbe7b95428709">More...</a><br /></td></tr>
<tr class="separator:ga319826b7eb1583c0595bbe7b95428709"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga9c771a757fc1294add611906b89ab2d2"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga9c771a757fc1294add611906b89ab2d2">TJXOPT_CROP</a></td></tr>
<tr class="memdesc:ga9c771a757fc1294add611906b89ab2d2"><td class="mdescLeft"> </td><td class="mdescRight">This option will enable lossless cropping. <a href="group___turbo_j_p_e_g.html#ga9c771a757fc1294add611906b89ab2d2">More...</a><br /></td></tr>
<tr class="separator:ga9c771a757fc1294add611906b89ab2d2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga3acee7b48ade1b99e5588736007c2589"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga3acee7b48ade1b99e5588736007c2589">TJXOPT_GRAY</a></td></tr>
<tr class="memdesc:ga3acee7b48ade1b99e5588736007c2589"><td class="mdescLeft"> </td><td class="mdescRight">This option will discard the color data in the input image and produce a grayscale output image. <a href="group___turbo_j_p_e_g.html#ga3acee7b48ade1b99e5588736007c2589">More...</a><br /></td></tr>
<tr class="separator:ga3acee7b48ade1b99e5588736007c2589"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gafbf992bbf6e006705886333703ffab31"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gafbf992bbf6e006705886333703ffab31">TJXOPT_NOOUTPUT</a></td></tr>
<tr class="memdesc:gafbf992bbf6e006705886333703ffab31"><td class="mdescLeft"> </td><td class="mdescRight">This option will prevent <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> from outputting a JPEG image for this particular transform (this can be used in conjunction with a custom filter to capture the transformed DCT coefficients without transcoding them.) <a href="group___turbo_j_p_e_g.html#gafbf992bbf6e006705886333703ffab31">More...</a><br /></td></tr>
<tr class="separator:gafbf992bbf6e006705886333703ffab31"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gad2371c80674584ecc1a7d75e564cf026"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gad2371c80674584ecc1a7d75e564cf026">TJXOPT_PROGRESSIVE</a></td></tr>
<tr class="memdesc:gad2371c80674584ecc1a7d75e564cf026"><td class="mdescLeft"> </td><td class="mdescRight">This option will enable progressive entropy coding in the output image generated by this particular transform. <a href="group___turbo_j_p_e_g.html#gad2371c80674584ecc1a7d75e564cf026">More...</a><br /></td></tr>
<tr class="separator:gad2371c80674584ecc1a7d75e564cf026"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga153b468cfb905d0de61706c838986fe8"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga153b468cfb905d0de61706c838986fe8">TJXOPT_COPYNONE</a></td></tr>
<tr class="memdesc:ga153b468cfb905d0de61706c838986fe8"><td class="mdescLeft"> </td><td class="mdescRight">This option will prevent <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> from copying any extra markers (including EXIF and ICC profile data) from the source image to the output image. <a href="group___turbo_j_p_e_g.html#ga153b468cfb905d0de61706c838986fe8">More...</a><br /></td></tr>
<tr class="separator:ga153b468cfb905d0de61706c838986fe8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga0aba955473315e405295d978f0c16511"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga0aba955473315e405295d978f0c16511">TJPAD</a>(width)</td></tr>
<tr class="memdesc:ga0aba955473315e405295d978f0c16511"><td class="mdescLeft"> </td><td class="mdescRight">Pad the given width to the nearest 32-bit boundary. <a href="group___turbo_j_p_e_g.html#ga0aba955473315e405295d978f0c16511">More...</a><br /></td></tr>
<tr class="separator:ga0aba955473315e405295d978f0c16511"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga84878bb65404204743aa18cac02781df"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga84878bb65404204743aa18cac02781df">TJSCALED</a>(dimension, scalingFactor)</td></tr>
<tr class="memdesc:ga84878bb65404204743aa18cac02781df"><td class="mdescLeft"> </td><td class="mdescRight">Compute the scaled value of <code>dimension</code> using the given scaling factor. <a href="group___turbo_j_p_e_g.html#ga84878bb65404204743aa18cac02781df">More...</a><br /></td></tr>
<tr class="separator:ga84878bb65404204743aa18cac02781df"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:ga504805ec0161f1b505397ca0118bf8fd"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="structtjtransform.html">tjtransform</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga504805ec0161f1b505397ca0118bf8fd">tjtransform</a></td></tr>
<tr class="memdesc:ga504805ec0161f1b505397ca0118bf8fd"><td class="mdescLeft"> </td><td class="mdescRight">Lossless transform. <a href="group___turbo_j_p_e_g.html#ga504805ec0161f1b505397ca0118bf8fd">More...</a><br /></td></tr>
<tr class="separator:ga504805ec0161f1b505397ca0118bf8fd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga758d2634ecb4949de7815cba621f5763"><td class="memItemLeft" align="right" valign="top">typedef void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a></td></tr>
<tr class="memdesc:ga758d2634ecb4949de7815cba621f5763"><td class="mdescLeft"> </td><td class="mdescRight">TurboJPEG instance handle. <a href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">More...</a><br /></td></tr>
<tr class="separator:ga758d2634ecb4949de7815cba621f5763"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr class="memitem:ga1d047060ea80bb9820d540bb928e9074"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga1d047060ea80bb9820d540bb928e9074">TJSAMP</a> { <br />
  <a class="el" href="group___turbo_j_p_e_g.html#gga1d047060ea80bb9820d540bb928e9074afb8da4f44197837bdec0a4f593dacae3">TJSAMP_444</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga1d047060ea80bb9820d540bb928e9074a136130902cc578f11f32429b59368404">TJSAMP_422</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga1d047060ea80bb9820d540bb928e9074a63085dbf683cfe39e513cdb6343e3737">TJSAMP_420</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga1d047060ea80bb9820d540bb928e9074a3f1c9504842ddc7a48d0f690754b6248">TJSAMP_GRAY</a>,
<br />
  <a class="el" href="group___turbo_j_p_e_g.html#gga1d047060ea80bb9820d540bb928e9074accf740e6f3aa6ba20ba922cad13cb974">TJSAMP_440</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga1d047060ea80bb9820d540bb928e9074a28ec62575e5ea295c3fde3001dc628e2">TJSAMP_411</a>
<br />
}</td></tr>
<tr class="memdesc:ga1d047060ea80bb9820d540bb928e9074"><td class="mdescLeft"> </td><td class="mdescRight">Chrominance subsampling options. <a href="group___turbo_j_p_e_g.html#ga1d047060ea80bb9820d540bb928e9074">More...</a><br /></td></tr>
<tr class="separator:ga1d047060ea80bb9820d540bb928e9074"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gac916144e26c3817ac514e64ae5d12e2a"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gac916144e26c3817ac514e64ae5d12e2a">TJPF</a> { <br />
  <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa7ce93230bff449518ce387c17e6ed37c">TJPF_RGB</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aab10624437fb8ef495a0b153e65749839">TJPF_BGR</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa83973bebb7e2dc6fa8bae89ff3f42e01">TJPF_RGBX</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa2a1fbf569ca79897eae886e3376ca4c8">TJPF_BGRX</a>,
<br />
  <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aaf6603b27147de47e212e75dac027b2af">TJPF_XBGR</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aadae996905efcfa3b42a0bb3bea7f9d84">TJPF_XRGB</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa5431b54b015337705f13118073711a1a">TJPF_GRAY</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa88d2e88fab67f6503cf972e14851cc12">TJPF_RGBA</a>,
<br />
  <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aac037ff1845cf9b74bb81a3659c2b9fb4">TJPF_BGRA</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa1ba1a7f1631dbeaa49a0a85fc4a40081">TJPF_ABGR</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aae8f846ed9d9de99b6e1dfe448848765c">TJPF_ARGB</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa7f5100ec44c91994e243f1cf55553f8b">TJPF_CMYK</a>,
<br />
  <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa84c1a6cead7952998e2fb895844a21ed">TJPF_UNKNOWN</a>
<br />
}</td></tr>
<tr class="memdesc:gac916144e26c3817ac514e64ae5d12e2a"><td class="mdescLeft"> </td><td class="mdescRight">Pixel formats. <a href="group___turbo_j_p_e_g.html#gac916144e26c3817ac514e64ae5d12e2a">More...</a><br /></td></tr>
<tr class="separator:gac916144e26c3817ac514e64ae5d12e2a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga4f83ad3368e0e29d1957be0efa7c3720"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga4f83ad3368e0e29d1957be0efa7c3720">TJCS</a> { <br />
  <a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720a677cb7ccb85c4038ac41964a2e09e555">TJCS_RGB</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720a7389b8f65bb387ffedce3efd0d78ec75">TJCS_YCbCr</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720ab3e7d6a87f695e45b81c1b5262b5a50a">TJCS_GRAY</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720a6c8b636152ac8195b869587db315ee53">TJCS_CMYK</a>,
<br />
  <a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720a53839e0fe867b76b58d16b0a1a7c598e">TJCS_YCCK</a>
<br />
}</td></tr>
<tr class="memdesc:ga4f83ad3368e0e29d1957be0efa7c3720"><td class="mdescLeft"> </td><td class="mdescRight">JPEG colorspaces. <a href="group___turbo_j_p_e_g.html#ga4f83ad3368e0e29d1957be0efa7c3720">More...</a><br /></td></tr>
<tr class="separator:ga4f83ad3368e0e29d1957be0efa7c3720"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gafbc17cfa57d0d5d11fea35ac025950fe"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gafbc17cfa57d0d5d11fea35ac025950fe">TJERR</a> { <a class="el" href="group___turbo_j_p_e_g.html#ggafbc17cfa57d0d5d11fea35ac025950fea342dd6e2aedb47bb257b4e7568329b59">TJERR_WARNING</a>,
<a class="el" href="group___turbo_j_p_e_g.html#ggafbc17cfa57d0d5d11fea35ac025950feafc9cceeada13122b09e4851e3788039a">TJERR_FATAL</a>
}</td></tr>
<tr class="memdesc:gafbc17cfa57d0d5d11fea35ac025950fe"><td class="mdescLeft"> </td><td class="mdescRight">Error codes. <a href="group___turbo_j_p_e_g.html#gafbc17cfa57d0d5d11fea35ac025950fe">More...</a><br /></td></tr>
<tr class="separator:gafbc17cfa57d0d5d11fea35ac025950fe"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga2de531af4e7e6c4f124908376b354866"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga2de531af4e7e6c4f124908376b354866">TJXOP</a> { <br />
  <a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866aad88c0366cd3f7d0eac9d7a3fa1c2c27">TJXOP_NONE</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866aa0df69776caa30f0fa28e26332d311ce">TJXOP_HFLIP</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866a324eddfbec53b7e691f61e56929d0d5d">TJXOP_VFLIP</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866a31060aed199f886afdd417f80499c32d">TJXOP_TRANSPOSE</a>,
<br />
  <a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866af3b14d488aea6ece9e5b3df73a74d6a4">TJXOP_TRANSVERSE</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866a43b2bbb23bc4bd548422d43fbe9af128">TJXOP_ROT90</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866a140952eb8dd0300accfcc22726d69692">TJXOP_ROT180</a>,
<a class="el" href="group___turbo_j_p_e_g.html#gga2de531af4e7e6c4f124908376b354866a3064ee5dfb7f032df332818587567a08">TJXOP_ROT270</a>
<br />
}</td></tr>
<tr class="memdesc:ga2de531af4e7e6c4f124908376b354866"><td class="mdescLeft"> </td><td class="mdescRight">Transform operations for <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> <a href="group___turbo_j_p_e_g.html#ga2de531af4e7e6c4f124908376b354866">More...</a><br /></td></tr>
<tr class="separator:ga2de531af4e7e6c4f124908376b354866"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga9d63a05fc6d813f4aae06107041a37e8"><td class="memItemLeft" align="right" valign="top">DLLEXPORT <a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga9d63a05fc6d813f4aae06107041a37e8">tjInitCompress</a> (void)</td></tr>
<tr class="memdesc:ga9d63a05fc6d813f4aae06107041a37e8"><td class="mdescLeft"> </td><td class="mdescRight">Create a TurboJPEG compressor instance. <a href="group___turbo_j_p_e_g.html#ga9d63a05fc6d813f4aae06107041a37e8">More...</a><br /></td></tr>
<tr class="separator:ga9d63a05fc6d813f4aae06107041a37e8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gafbdce0112fd78fd38efae841443a9bcf"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gafbdce0112fd78fd38efae841443a9bcf">tjCompress2</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *srcBuf, int width, int pitch, int height, int pixelFormat, unsigned char **jpegBuf, unsigned long *jpegSize, int jpegSubsamp, int jpegQual, int flags)</td></tr>
<tr class="memdesc:gafbdce0112fd78fd38efae841443a9bcf"><td class="mdescLeft"> </td><td class="mdescRight">Compress an RGB, grayscale, or CMYK image into a JPEG image. <a href="group___turbo_j_p_e_g.html#gafbdce0112fd78fd38efae841443a9bcf">More...</a><br /></td></tr>
<tr class="separator:gafbdce0112fd78fd38efae841443a9bcf"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga7622a459b79aa1007e005b58783f875b"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga7622a459b79aa1007e005b58783f875b">tjCompressFromYUV</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *srcBuf, int width, int pad, int height, int subsamp, unsigned char **jpegBuf, unsigned long *jpegSize, int jpegQual, int flags)</td></tr>
<tr class="memdesc:ga7622a459b79aa1007e005b58783f875b"><td class="mdescLeft"> </td><td class="mdescRight">Compress a YUV planar image into a JPEG image. <a href="group___turbo_j_p_e_g.html#ga7622a459b79aa1007e005b58783f875b">More...</a><br /></td></tr>
<tr class="separator:ga7622a459b79aa1007e005b58783f875b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga29ec5dfbd2d84b8724e951d6fa0d5d9e"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga29ec5dfbd2d84b8724e951d6fa0d5d9e">tjCompressFromYUVPlanes</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char **srcPlanes, int width, const int *strides, int height, int subsamp, unsigned char **jpegBuf, unsigned long *jpegSize, int jpegQual, int flags)</td></tr>
<tr class="memdesc:ga29ec5dfbd2d84b8724e951d6fa0d5d9e"><td class="mdescLeft"> </td><td class="mdescRight">Compress a set of Y, U (Cb), and V (Cr) image planes into a JPEG image. <a href="group___turbo_j_p_e_g.html#ga29ec5dfbd2d84b8724e951d6fa0d5d9e">More...</a><br /></td></tr>
<tr class="separator:ga29ec5dfbd2d84b8724e951d6fa0d5d9e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga67ac12fee79073242cb216e07c9f1f90"><td class="memItemLeft" align="right" valign="top">DLLEXPORT unsigned long </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga67ac12fee79073242cb216e07c9f1f90">tjBufSize</a> (int width, int height, int jpegSubsamp)</td></tr>
<tr class="memdesc:ga67ac12fee79073242cb216e07c9f1f90"><td class="mdescLeft"> </td><td class="mdescRight">The maximum size of the buffer (in bytes) required to hold a JPEG image with the given parameters. <a href="group___turbo_j_p_e_g.html#ga67ac12fee79073242cb216e07c9f1f90">More...</a><br /></td></tr>
<tr class="separator:ga67ac12fee79073242cb216e07c9f1f90"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga2be2b9969d4df9ecce9b05deed273194"><td class="memItemLeft" align="right" valign="top">DLLEXPORT unsigned long </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga2be2b9969d4df9ecce9b05deed273194">tjBufSizeYUV2</a> (int width, int pad, int height, int subsamp)</td></tr>
<tr class="memdesc:ga2be2b9969d4df9ecce9b05deed273194"><td class="mdescLeft"> </td><td class="mdescRight">The size of the buffer (in bytes) required to hold a YUV planar image with the given parameters. <a href="group___turbo_j_p_e_g.html#ga2be2b9969d4df9ecce9b05deed273194">More...</a><br /></td></tr>
<tr class="separator:ga2be2b9969d4df9ecce9b05deed273194"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gab4ab7b24f6e797d79abaaa670373961d"><td class="memItemLeft" align="right" valign="top">DLLEXPORT unsigned long </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gab4ab7b24f6e797d79abaaa670373961d">tjPlaneSizeYUV</a> (int componentID, int width, int stride, int height, int subsamp)</td></tr>
<tr class="memdesc:gab4ab7b24f6e797d79abaaa670373961d"><td class="mdescLeft"> </td><td class="mdescRight">The size of the buffer (in bytes) required to hold a YUV image plane with the given parameters. <a href="group___turbo_j_p_e_g.html#gab4ab7b24f6e797d79abaaa670373961d">More...</a><br /></td></tr>
<tr class="separator:gab4ab7b24f6e797d79abaaa670373961d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga63fb66bb1e36c74008c4634360becbb1"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga63fb66bb1e36c74008c4634360becbb1">tjPlaneWidth</a> (int componentID, int width, int subsamp)</td></tr>
<tr class="memdesc:ga63fb66bb1e36c74008c4634360becbb1"><td class="mdescLeft"> </td><td class="mdescRight">The plane width of a YUV image plane with the given parameters. <a href="group___turbo_j_p_e_g.html#ga63fb66bb1e36c74008c4634360becbb1">More...</a><br /></td></tr>
<tr class="separator:ga63fb66bb1e36c74008c4634360becbb1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga1a209696c6a80748f20e134b3c64789f"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga1a209696c6a80748f20e134b3c64789f">tjPlaneHeight</a> (int componentID, int height, int subsamp)</td></tr>
<tr class="memdesc:ga1a209696c6a80748f20e134b3c64789f"><td class="mdescLeft"> </td><td class="mdescRight">The plane height of a YUV image plane with the given parameters. <a href="group___turbo_j_p_e_g.html#ga1a209696c6a80748f20e134b3c64789f">More...</a><br /></td></tr>
<tr class="separator:ga1a209696c6a80748f20e134b3c64789f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gac519b922cdf446e97d0cdcba513636bf"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gac519b922cdf446e97d0cdcba513636bf">tjEncodeYUV3</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *srcBuf, int width, int pitch, int height, int pixelFormat, unsigned char *dstBuf, int pad, int subsamp, int flags)</td></tr>
<tr class="memdesc:gac519b922cdf446e97d0cdcba513636bf"><td class="mdescLeft"> </td><td class="mdescRight">Encode an RGB or grayscale image into a YUV planar image. <a href="group___turbo_j_p_e_g.html#gac519b922cdf446e97d0cdcba513636bf">More...</a><br /></td></tr>
<tr class="separator:gac519b922cdf446e97d0cdcba513636bf"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gae2d04c72457fe7f4d60cf78ab1b1feb1"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gae2d04c72457fe7f4d60cf78ab1b1feb1">tjEncodeYUVPlanes</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *srcBuf, int width, int pitch, int height, int pixelFormat, unsigned char **dstPlanes, int *strides, int subsamp, int flags)</td></tr>
<tr class="memdesc:gae2d04c72457fe7f4d60cf78ab1b1feb1"><td class="mdescLeft"> </td><td class="mdescRight">Encode an RGB or grayscale image into separate Y, U (Cb), and V (Cr) image planes. <a href="group___turbo_j_p_e_g.html#gae2d04c72457fe7f4d60cf78ab1b1feb1">More...</a><br /></td></tr>
<tr class="separator:gae2d04c72457fe7f4d60cf78ab1b1feb1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga52300eac3f3d9ef4bab303bc244f62d3"><td class="memItemLeft" align="right" valign="top">DLLEXPORT <a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga52300eac3f3d9ef4bab303bc244f62d3">tjInitDecompress</a> (void)</td></tr>
<tr class="memdesc:ga52300eac3f3d9ef4bab303bc244f62d3"><td class="mdescLeft"> </td><td class="mdescRight">Create a TurboJPEG decompressor instance. <a href="group___turbo_j_p_e_g.html#ga52300eac3f3d9ef4bab303bc244f62d3">More...</a><br /></td></tr>
<tr class="separator:ga52300eac3f3d9ef4bab303bc244f62d3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga0595681096bba7199cc6f3533cb25f77"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga0595681096bba7199cc6f3533cb25f77">tjDecompressHeader3</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *jpegBuf, unsigned long jpegSize, int *width, int *height, int *jpegSubsamp, int *jpegColorspace)</td></tr>
<tr class="memdesc:ga0595681096bba7199cc6f3533cb25f77"><td class="mdescLeft"> </td><td class="mdescRight">Retrieve information about a JPEG image without decompressing it. <a href="group___turbo_j_p_e_g.html#ga0595681096bba7199cc6f3533cb25f77">More...</a><br /></td></tr>
<tr class="separator:ga0595681096bba7199cc6f3533cb25f77"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gac3854476006b10787bd128f7ede48057"><td class="memItemLeft" align="right" valign="top">DLLEXPORT <a class="el" href="structtjscalingfactor.html">tjscalingfactor</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gac3854476006b10787bd128f7ede48057">tjGetScalingFactors</a> (int *numscalingfactors)</td></tr>
<tr class="memdesc:gac3854476006b10787bd128f7ede48057"><td class="mdescLeft"> </td><td class="mdescRight">Returns a list of fractional scaling factors that the JPEG decompressor in this implementation of TurboJPEG supports. <a href="group___turbo_j_p_e_g.html#gac3854476006b10787bd128f7ede48057">More...</a><br /></td></tr>
<tr class="separator:gac3854476006b10787bd128f7ede48057"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gae9eccef8b682a48f43a9117c231ed013"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gae9eccef8b682a48f43a9117c231ed013">tjDecompress2</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *jpegBuf, unsigned long jpegSize, unsigned char *dstBuf, int width, int pitch, int height, int pixelFormat, int flags)</td></tr>
<tr class="memdesc:gae9eccef8b682a48f43a9117c231ed013"><td class="mdescLeft"> </td><td class="mdescRight">Decompress a JPEG image to an RGB, grayscale, or CMYK image. <a href="group___turbo_j_p_e_g.html#gae9eccef8b682a48f43a9117c231ed013">More...</a><br /></td></tr>
<tr class="separator:gae9eccef8b682a48f43a9117c231ed013"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga04d1e839ff9a0860dd1475cff78d3364"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga04d1e839ff9a0860dd1475cff78d3364">tjDecompressToYUV2</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *jpegBuf, unsigned long jpegSize, unsigned char *dstBuf, int width, int pad, int height, int flags)</td></tr>
<tr class="memdesc:ga04d1e839ff9a0860dd1475cff78d3364"><td class="mdescLeft"> </td><td class="mdescRight">Decompress a JPEG image to a YUV planar image. <a href="group___turbo_j_p_e_g.html#ga04d1e839ff9a0860dd1475cff78d3364">More...</a><br /></td></tr>
<tr class="separator:ga04d1e839ff9a0860dd1475cff78d3364"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa59f901a5258ada5bd0185ad59368540"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gaa59f901a5258ada5bd0185ad59368540">tjDecompressToYUVPlanes</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *jpegBuf, unsigned long jpegSize, unsigned char **dstPlanes, int width, int *strides, int height, int flags)</td></tr>
<tr class="memdesc:gaa59f901a5258ada5bd0185ad59368540"><td class="mdescLeft"> </td><td class="mdescRight">Decompress a JPEG image into separate Y, U (Cb), and V (Cr) image planes. <a href="group___turbo_j_p_e_g.html#gaa59f901a5258ada5bd0185ad59368540">More...</a><br /></td></tr>
<tr class="separator:gaa59f901a5258ada5bd0185ad59368540"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga70abbf38f77a26fd6da8813bef96f695"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga70abbf38f77a26fd6da8813bef96f695">tjDecodeYUV</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *srcBuf, int pad, int subsamp, unsigned char *dstBuf, int width, int pitch, int height, int pixelFormat, int flags)</td></tr>
<tr class="memdesc:ga70abbf38f77a26fd6da8813bef96f695"><td class="mdescLeft"> </td><td class="mdescRight">Decode a YUV planar image into an RGB or grayscale image. <a href="group___turbo_j_p_e_g.html#ga70abbf38f77a26fd6da8813bef96f695">More...</a><br /></td></tr>
<tr class="separator:ga70abbf38f77a26fd6da8813bef96f695"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga10e837c07fa9d25770565b237d3898d9"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga10e837c07fa9d25770565b237d3898d9">tjDecodeYUVPlanes</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char **srcPlanes, const int *strides, int subsamp, unsigned char *dstBuf, int width, int pitch, int height, int pixelFormat, int flags)</td></tr>
<tr class="memdesc:ga10e837c07fa9d25770565b237d3898d9"><td class="mdescLeft"> </td><td class="mdescRight">Decode a set of Y, U (Cb), and V (Cr) image planes into an RGB or grayscale image. <a href="group___turbo_j_p_e_g.html#ga10e837c07fa9d25770565b237d3898d9">More...</a><br /></td></tr>
<tr class="separator:ga10e837c07fa9d25770565b237d3898d9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga928beff6ac248ceadf01089fc6b41957"><td class="memItemLeft" align="right" valign="top">DLLEXPORT <a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga928beff6ac248ceadf01089fc6b41957">tjInitTransform</a> (void)</td></tr>
<tr class="memdesc:ga928beff6ac248ceadf01089fc6b41957"><td class="mdescLeft"> </td><td class="mdescRight">Create a new TurboJPEG transformer instance. <a href="group___turbo_j_p_e_g.html#ga928beff6ac248ceadf01089fc6b41957">More...</a><br /></td></tr>
<tr class="separator:ga928beff6ac248ceadf01089fc6b41957"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga9cb8abf4cc91881e04a0329b2270be25"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25">tjTransform</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle, const unsigned char *jpegBuf, unsigned long jpegSize, int n, unsigned char **dstBufs, unsigned long *dstSizes, <a class="el" href="structtjtransform.html">tjtransform</a> *transforms, int flags)</td></tr>
<tr class="memdesc:ga9cb8abf4cc91881e04a0329b2270be25"><td class="mdescLeft"> </td><td class="mdescRight">Losslessly transform a JPEG image into another JPEG image. <a href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25">More...</a><br /></td></tr>
<tr class="separator:ga9cb8abf4cc91881e04a0329b2270be25"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga75f355fa27225ba1a4ee392c852394d2"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga75f355fa27225ba1a4ee392c852394d2">tjDestroy</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle)</td></tr>
<tr class="memdesc:ga75f355fa27225ba1a4ee392c852394d2"><td class="mdescLeft"> </td><td class="mdescRight">Destroy a TurboJPEG compressor, decompressor, or transformer instance. <a href="group___turbo_j_p_e_g.html#ga75f355fa27225ba1a4ee392c852394d2">More...</a><br /></td></tr>
<tr class="separator:ga75f355fa27225ba1a4ee392c852394d2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaec627dd4c5f30b7a775a7aea3bec5d83"><td class="memItemLeft" align="right" valign="top">DLLEXPORT unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gaec627dd4c5f30b7a775a7aea3bec5d83">tjAlloc</a> (int bytes)</td></tr>
<tr class="memdesc:gaec627dd4c5f30b7a775a7aea3bec5d83"><td class="mdescLeft"> </td><td class="mdescRight">Allocate an image buffer for use with TurboJPEG. <a href="group___turbo_j_p_e_g.html#gaec627dd4c5f30b7a775a7aea3bec5d83">More...</a><br /></td></tr>
<tr class="separator:gaec627dd4c5f30b7a775a7aea3bec5d83"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaffbd83c375e79f5db4b5c5d8ad4466e7"><td class="memItemLeft" align="right" valign="top">DLLEXPORT unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gaffbd83c375e79f5db4b5c5d8ad4466e7">tjLoadImage</a> (const char *filename, int *width, int align, int *height, int *pixelFormat, int flags)</td></tr>
<tr class="memdesc:gaffbd83c375e79f5db4b5c5d8ad4466e7"><td class="mdescLeft"> </td><td class="mdescRight">Load an uncompressed image from disk into memory. <a href="group___turbo_j_p_e_g.html#gaffbd83c375e79f5db4b5c5d8ad4466e7">More...</a><br /></td></tr>
<tr class="separator:gaffbd83c375e79f5db4b5c5d8ad4466e7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga6f445b22d8933ae4815b3370a538d879"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga6f445b22d8933ae4815b3370a538d879">tjSaveImage</a> (const char *filename, unsigned char *buffer, int width, int pitch, int height, int pixelFormat, int flags)</td></tr>
<tr class="memdesc:ga6f445b22d8933ae4815b3370a538d879"><td class="mdescLeft"> </td><td class="mdescRight">Save an uncompressed image from memory to disk. <a href="group___turbo_j_p_e_g.html#ga6f445b22d8933ae4815b3370a538d879">More...</a><br /></td></tr>
<tr class="separator:ga6f445b22d8933ae4815b3370a538d879"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaea863d2da0cdb609563aabdf9196514b"><td class="memItemLeft" align="right" valign="top">DLLEXPORT void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gaea863d2da0cdb609563aabdf9196514b">tjFree</a> (unsigned char *buffer)</td></tr>
<tr class="memdesc:gaea863d2da0cdb609563aabdf9196514b"><td class="mdescLeft"> </td><td class="mdescRight">Free an image buffer previously allocated by TurboJPEG. <a href="group___turbo_j_p_e_g.html#gaea863d2da0cdb609563aabdf9196514b">More...</a><br /></td></tr>
<tr class="separator:gaea863d2da0cdb609563aabdf9196514b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga1ead8574f9f39fbafc6b497124e7aafa"><td class="memItemLeft" align="right" valign="top">DLLEXPORT char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga1ead8574f9f39fbafc6b497124e7aafa">tjGetErrorStr2</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle)</td></tr>
<tr class="memdesc:ga1ead8574f9f39fbafc6b497124e7aafa"><td class="mdescLeft"> </td><td class="mdescRight">Returns a descriptive error message explaining why the last command failed. <a href="group___turbo_j_p_e_g.html#ga1ead8574f9f39fbafc6b497124e7aafa">More...</a><br /></td></tr>
<tr class="separator:ga1ead8574f9f39fbafc6b497124e7aafa"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga414feeffbf860ebd31c745df203de410"><td class="memItemLeft" align="right" valign="top">DLLEXPORT int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga414feeffbf860ebd31c745df203de410">tjGetErrorCode</a> (<a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a> handle)</td></tr>
<tr class="memdesc:ga414feeffbf860ebd31c745df203de410"><td class="mdescLeft"> </td><td class="mdescRight">Returns a code indicating the severity of the last error. <a href="group___turbo_j_p_e_g.html#ga414feeffbf860ebd31c745df203de410">More...</a><br /></td></tr>
<tr class="separator:ga414feeffbf860ebd31c745df203de410"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="var-members"></a>
Variables</h2></td></tr>
<tr class="memitem:ga9e61e7cd47a15a173283ba94e781308c"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga9e61e7cd47a15a173283ba94e781308c">tjMCUWidth</a> [<a class="el" href="group___turbo_j_p_e_g.html#ga5ef3d169162ce77ce348e292a0b7477c">TJ_NUMSAMP</a>]</td></tr>
<tr class="memdesc:ga9e61e7cd47a15a173283ba94e781308c"><td class="mdescLeft"> </td><td class="mdescRight">MCU block width (in pixels) for a given level of chrominance subsampling. <a href="group___turbo_j_p_e_g.html#ga9e61e7cd47a15a173283ba94e781308c">More...</a><br /></td></tr>
<tr class="separator:ga9e61e7cd47a15a173283ba94e781308c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gabd247bb9fecb393eca57366feb8327bf"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gabd247bb9fecb393eca57366feb8327bf">tjMCUHeight</a> [<a class="el" href="group___turbo_j_p_e_g.html#ga5ef3d169162ce77ce348e292a0b7477c">TJ_NUMSAMP</a>]</td></tr>
<tr class="memdesc:gabd247bb9fecb393eca57366feb8327bf"><td class="mdescLeft"> </td><td class="mdescRight">MCU block height (in pixels) for a given level of chrominance subsampling. <a href="group___turbo_j_p_e_g.html#gabd247bb9fecb393eca57366feb8327bf">More...</a><br /></td></tr>
<tr class="separator:gabd247bb9fecb393eca57366feb8327bf"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gadd9b446742ac8a3923f7992c7988fea8"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gadd9b446742ac8a3923f7992c7988fea8">tjRedOffset</a> [<a class="el" href="group___turbo_j_p_e_g.html#ga7010a4402f54a45ba822ad8675a4655e">TJ_NUMPF</a>]</td></tr>
<tr class="memdesc:gadd9b446742ac8a3923f7992c7988fea8"><td class="mdescLeft"> </td><td class="mdescRight">Red offset (in bytes) for a given pixel format. <a href="group___turbo_j_p_e_g.html#gadd9b446742ac8a3923f7992c7988fea8">More...</a><br /></td></tr>
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<tr class="memitem:ga82d6e35da441112a411da41923c0ba2f"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga82d6e35da441112a411da41923c0ba2f">tjGreenOffset</a> [<a class="el" href="group___turbo_j_p_e_g.html#ga7010a4402f54a45ba822ad8675a4655e">TJ_NUMPF</a>]</td></tr>
<tr class="memdesc:ga82d6e35da441112a411da41923c0ba2f"><td class="mdescLeft"> </td><td class="mdescRight">Green offset (in bytes) for a given pixel format. <a href="group___turbo_j_p_e_g.html#ga82d6e35da441112a411da41923c0ba2f">More...</a><br /></td></tr>
<tr class="separator:ga82d6e35da441112a411da41923c0ba2f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga84e2e35d3f08025f976ec1ec53693dea"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga84e2e35d3f08025f976ec1ec53693dea">tjBlueOffset</a> [<a class="el" href="group___turbo_j_p_e_g.html#ga7010a4402f54a45ba822ad8675a4655e">TJ_NUMPF</a>]</td></tr>
<tr class="memdesc:ga84e2e35d3f08025f976ec1ec53693dea"><td class="mdescLeft"> </td><td class="mdescRight">Blue offset (in bytes) for a given pixel format. <a href="group___turbo_j_p_e_g.html#ga84e2e35d3f08025f976ec1ec53693dea">More...</a><br /></td></tr>
<tr class="separator:ga84e2e35d3f08025f976ec1ec53693dea"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga5af0ab065feefd526debf1e20c43e837"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga5af0ab065feefd526debf1e20c43e837">tjAlphaOffset</a> [<a class="el" href="group___turbo_j_p_e_g.html#ga7010a4402f54a45ba822ad8675a4655e">TJ_NUMPF</a>]</td></tr>
<tr class="memdesc:ga5af0ab065feefd526debf1e20c43e837"><td class="mdescLeft"> </td><td class="mdescRight">Alpha offset (in bytes) for a given pixel format. <a href="group___turbo_j_p_e_g.html#ga5af0ab065feefd526debf1e20c43e837">More...</a><br /></td></tr>
<tr class="separator:ga5af0ab065feefd526debf1e20c43e837"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gad77cf8fe5b2bfd3cb3f53098146abb4c"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#gad77cf8fe5b2bfd3cb3f53098146abb4c">tjPixelSize</a> [<a class="el" href="group___turbo_j_p_e_g.html#ga7010a4402f54a45ba822ad8675a4655e">TJ_NUMPF</a>]</td></tr>
<tr class="memdesc:gad77cf8fe5b2bfd3cb3f53098146abb4c"><td class="mdescLeft"> </td><td class="mdescRight">Pixel size (in bytes) for a given pixel format. <a href="group___turbo_j_p_e_g.html#gad77cf8fe5b2bfd3cb3f53098146abb4c">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>TurboJPEG API. </p>
<p>This API provides an interface for generating, decoding, and transforming planar YUV and JPEG images in memory.</p>
<p><a class="anchor" id="YUVnotes"></a></p>
<h2><a class="anchor" id="autotoc_md0"></a>
YUV Image Format Notes</h2>
<p>Technically, the JPEG format uses the YCbCr colorspace (which is technically not a colorspace but a color transform), but per the convention of the digital video community, the TurboJPEG API uses "YUV" to refer to an image format consisting of Y, Cb, and Cr image planes.</p>
<p>Each plane is simply a 2D array of bytes, each byte representing the value of one of the components (Y, Cb, or Cr) at a particular location in the image. The width and height of each plane are determined by the image width, height, and level of chrominance subsampling. The luminance plane width is the image width padded to the nearest multiple of the horizontal subsampling factor (2 in the case of 4:2:0 and 4:2:2, 4 in the case of 4:1:1, 1 in the case of 4:4:4 or grayscale.) Similarly, the luminance plane height is the image height padded to the nearest multiple of the vertical subsampling factor (2 in the case of 4:2:0 or 4:4:0, 1 in the case of 4:4:4 or grayscale.) This is irrespective of any additional padding that may be specified as an argument to the various YUV functions. The chrominance plane width is equal to the luminance plane width divided by the horizontal subsampling factor, and the chrominance plane height is equal to the luminance plane height divided by the vertical subsampling factor.</p>
<p>For example, if the source image is 35 x 35 pixels and 4:2:2 subsampling is used, then the luminance plane would be 36 x 35 bytes, and each of the chrominance planes would be 18 x 35 bytes. If you specify a line padding of 4 bytes on top of this, then the luminance plane would be 36 x 35 bytes, and each of the chrominance planes would be 20 x 35 bytes. </p>
<h2 class="groupheader">Macro Definition Documentation</h2>
<a id="ga39f57a6fb02d9cf32e7b6890099b5a71"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga39f57a6fb02d9cf32e7b6890099b5a71">◆ </a></span>TJ_NUMCS</h2>
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<p>The number of JPEG colorspaces. </p>
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<a id="ga79bde1b4a3e2351e00887e47781b966e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga79bde1b4a3e2351e00887e47781b966e">◆ </a></span>TJ_NUMERR</h2>
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<td class="memname">#define TJ_NUMERR</td>
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<p>The number of error codes. </p>
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<a id="ga7010a4402f54a45ba822ad8675a4655e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga7010a4402f54a45ba822ad8675a4655e">◆ </a></span>TJ_NUMPF</h2>
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<td class="memname">#define TJ_NUMPF</td>
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<p>The number of pixel formats. </p>
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<a id="ga5ef3d169162ce77ce348e292a0b7477c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga5ef3d169162ce77ce348e292a0b7477c">◆ </a></span>TJ_NUMSAMP</h2>
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<td class="memname">#define TJ_NUMSAMP</td>
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<p>The number of chrominance subsampling options. </p>
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<a id="ga0f6dbd18adf38b7d46ac547f0f4d562c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga0f6dbd18adf38b7d46ac547f0f4d562c">◆ </a></span>TJ_NUMXOP</h2>
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<td class="memname">#define TJ_NUMXOP</td>
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<p>The number of transform operations. </p>
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<a id="gacb233cfd722d66d1ccbf48a7de81f0e0"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gacb233cfd722d66d1ccbf48a7de81f0e0">◆ </a></span>TJFLAG_ACCURATEDCT</h2>
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<td class="memname">#define TJFLAG_ACCURATEDCT</td>
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<p>Use the most accurate DCT/IDCT algorithm available in the underlying codec. </p>
<p>The default if this flag is not specified is implementation-specific. For example, the implementation of TurboJPEG for libjpeg[-turbo] uses the fast algorithm by default when compressing, because this has been shown to have only a very slight effect on accuracy, but it uses the accurate algorithm when decompressing, because this has been shown to have a larger effect. </p>
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<a id="ga72ecf4ebe6eb702d3c6f5ca27455e1ec"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga72ecf4ebe6eb702d3c6f5ca27455e1ec">◆ </a></span>TJFLAG_BOTTOMUP</h2>
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<td class="memname">#define TJFLAG_BOTTOMUP</td>
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<p>The uncompressed source/destination image is stored in bottom-up (Windows, OpenGL) order, not top-down (X11) order. </p>
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<a id="gaabce235db80d3f698b27f36cbd453da2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaabce235db80d3f698b27f36cbd453da2">◆ </a></span>TJFLAG_FASTDCT</h2>
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<td class="memname">#define TJFLAG_FASTDCT</td>
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<p>Use the fastest DCT/IDCT algorithm available in the underlying codec. </p>
<p>The default if this flag is not specified is implementation-specific. For example, the implementation of TurboJPEG for libjpeg[-turbo] uses the fast algorithm by default when compressing, because this has been shown to have only a very slight effect on accuracy, but it uses the accurate algorithm when decompressing, because this has been shown to have a larger effect. </p>
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<a id="ga4ee4506c81177a06f77e2504a22efd2d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga4ee4506c81177a06f77e2504a22efd2d">◆ </a></span>TJFLAG_FASTUPSAMPLE</h2>
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<td class="memname">#define TJFLAG_FASTUPSAMPLE</td>
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<p>When decompressing an image that was compressed using chrominance subsampling, use the fastest chrominance upsampling algorithm available in the underlying codec. </p>
<p>The default is to use smooth upsampling, which creates a smooth transition between neighboring chrominance components in order to reduce upsampling artifacts in the decompressed image. </p>
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<a id="ga163e6482dc5096831feef9c79ff3f805"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga163e6482dc5096831feef9c79ff3f805">◆ </a></span>TJFLAG_LIMITSCANS</h2>
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<td class="memname">#define TJFLAG_LIMITSCANS</td>
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<p>Limit the number of progressive JPEG scans that the decompression and transform functions will process. </p>
<p>If a progressive JPEG image contains an unreasonably large number of scans, then this flag will cause the decompression and transform functions to return an error. The primary purpose of this is to allow security-critical applications to guard against an exploit of the progressive JPEG format described in <a href="https://libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf" target="_blank">this report</a>. </p>
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<a id="ga8808d403c68b62aaa58a4c1e58e98963"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga8808d403c68b62aaa58a4c1e58e98963">◆ </a></span>TJFLAG_NOREALLOC</h2>
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<td class="memname">#define TJFLAG_NOREALLOC</td>
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<p>Disable buffer (re)allocation. </p>
<p>If passed to one of the JPEG compression or transform functions, this flag will cause those functions to generate an error if the JPEG image buffer is invalid or too small rather than attempting to allocate or reallocate that buffer. This reproduces the behavior of earlier versions of TurboJPEG. </p>
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<a id="ga43b426750b46190a25d34a67ef76df1b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga43b426750b46190a25d34a67ef76df1b">◆ </a></span>TJFLAG_PROGRESSIVE</h2>
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<td class="memname">#define TJFLAG_PROGRESSIVE</td>
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<p>Use progressive entropy coding in JPEG images generated by the compression and transform functions. </p>
<p>Progressive entropy coding will generally improve compression relative to baseline entropy coding (the default), but it will reduce compression and decompression performance considerably. </p>
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<a id="ga519cfa4ef6c18d9e5b455fdf59306a3a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga519cfa4ef6c18d9e5b455fdf59306a3a">◆ </a></span>TJFLAG_STOPONWARNING</h2>
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<td class="memname">#define TJFLAG_STOPONWARNING</td>
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<p>Immediately discontinue the current compression/decompression/transform operation if the underlying codec throws a warning (non-fatal error). </p>
<p>The default behavior is to allow the operation to complete unless a fatal error is encountered. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga0aba955473315e405295d978f0c16511">◆ </a></span>TJPAD</h2>
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<td class="memname">#define TJPAD</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">width</td><td>)</td>
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<p>Pad the given width to the nearest 32-bit boundary. </p>
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<a id="ga84878bb65404204743aa18cac02781df"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga84878bb65404204743aa18cac02781df">◆ </a></span>TJSCALED</h2>
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<td class="memname">#define TJSCALED</td>
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<td class="paramtype"> </td>
<td class="paramname">dimension, </td>
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<td class="paramtype"> </td>
<td class="paramname">scalingFactor </td>
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<td>)</td>
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<p>Compute the scaled value of <code>dimension</code> using the given scaling factor. </p>
<p>This macro performs the integer equivalent of <code>ceil(dimension * scalingFactor)</code>. </p>
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<a id="ga153b468cfb905d0de61706c838986fe8"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga153b468cfb905d0de61706c838986fe8">◆ </a></span>TJXOPT_COPYNONE</h2>
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<td class="memname">#define TJXOPT_COPYNONE</td>
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<p>This option will prevent <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> from copying any extra markers (including EXIF and ICC profile data) from the source image to the output image. </p>
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<p>This option will enable lossless cropping. </p>
<p>See <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> for more information. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga3acee7b48ade1b99e5588736007c2589">◆ </a></span>TJXOPT_GRAY</h2>
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<p>This option will discard the color data in the input image and produce a grayscale output image. </p>
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<p>This option will prevent <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> from outputting a JPEG image for this particular transform (this can be used in conjunction with a custom filter to capture the transformed DCT coefficients without transcoding them.) </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga50e03cb5ed115330e212417429600b00">◆ </a></span>TJXOPT_PERFECT</h2>
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<p>This option will cause <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> to return an error if the transform is not perfect. </p>
<p>Lossless transforms operate on MCU blocks, whose size depends on the level of chrominance subsampling used (see <a class="el" href="group___turbo_j_p_e_g.html#ga9e61e7cd47a15a173283ba94e781308c" title="MCU block width (in pixels) for a given level of chrominance subsampling.">tjMCUWidth</a> and <a class="el" href="group___turbo_j_p_e_g.html#gabd247bb9fecb393eca57366feb8327bf" title="MCU block height (in pixels) for a given level of chrominance subsampling.">tjMCUHeight</a>.) If the image's width or height is not evenly divisible by the MCU block size, then there will be partial MCU blocks on the right and/or bottom edges. It is not possible to move these partial MCU blocks to the top or left of the image, so any transform that would require that is "imperfect." If this option is not specified, then any partial MCU blocks that cannot be transformed will be left in place, which will create odd-looking strips on the right or bottom edge of the image. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gad2371c80674584ecc1a7d75e564cf026">◆ </a></span>TJXOPT_PROGRESSIVE</h2>
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<p>This option will enable progressive entropy coding in the output image generated by this particular transform. </p>
<p>Progressive entropy coding will generally improve compression relative to baseline entropy coding (the default), but it will reduce compression and decompression performance considerably. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga319826b7eb1583c0595bbe7b95428709">◆ </a></span>TJXOPT_TRIM</h2>
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<p>This option will cause <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> to discard any partial MCU blocks that cannot be transformed. </p>
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<h2 class="groupheader">Typedef Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga758d2634ecb4949de7815cba621f5763">◆ </a></span>tjhandle</h2>
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<td class="memname">typedef void* <a class="el" href="group___turbo_j_p_e_g.html#ga758d2634ecb4949de7815cba621f5763">tjhandle</a></td>
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<p>TurboJPEG instance handle. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga504805ec0161f1b505397ca0118bf8fd">◆ </a></span>tjtransform</h2>
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<td class="memname">typedef struct <a class="el" href="structtjtransform.html">tjtransform</a> <a class="el" href="structtjtransform.html">tjtransform</a></td>
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<p>Lossless transform. </p>
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<h2 class="groupheader">Enumeration Type Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga4f83ad3368e0e29d1957be0efa7c3720">◆ </a></span>TJCS</h2>
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<td class="memname">enum <a class="el" href="group___turbo_j_p_e_g.html#ga4f83ad3368e0e29d1957be0efa7c3720">TJCS</a></td>
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<p>JPEG colorspaces. </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="gga4f83ad3368e0e29d1957be0efa7c3720a677cb7ccb85c4038ac41964a2e09e555"></a>TJCS_RGB </td><td class="fielddoc"><p>RGB colorspace. </p>
<p>When compressing the JPEG image, the R, G, and B components in the source image are reordered into image planes, but no colorspace conversion or subsampling is performed. RGB JPEG images can be decompressed to any of the extended RGB pixel formats or grayscale, but they cannot be decompressed to YUV images. </p>
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<tr><td class="fieldname"><a id="gga4f83ad3368e0e29d1957be0efa7c3720a7389b8f65bb387ffedce3efd0d78ec75"></a>TJCS_YCbCr </td><td class="fielddoc"><p>YCbCr colorspace. </p>
<p>YCbCr is not an absolute colorspace but rather a mathematical transformation of RGB designed solely for storage and transmission. YCbCr images must be converted to RGB before they can actually be displayed. In the YCbCr colorspace, the Y (luminance) component represents the black & white portion of the original image, and the Cb and Cr (chrominance) components represent the color portion of the original image. Originally, the analog equivalent of this transformation allowed the same signal to drive both black & white and color televisions, but JPEG images use YCbCr primarily because it allows the color data to be optionally subsampled for the purposes of reducing bandwidth or disk space. YCbCr is the most common JPEG colorspace, and YCbCr JPEG images can be compressed from and decompressed to any of the extended RGB pixel formats or grayscale, or they can be decompressed to YUV planar images. </p>
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<tr><td class="fieldname"><a id="gga4f83ad3368e0e29d1957be0efa7c3720ab3e7d6a87f695e45b81c1b5262b5a50a"></a>TJCS_GRAY </td><td class="fielddoc"><p>Grayscale colorspace. </p>
<p>The JPEG image retains only the luminance data (Y component), and any color data from the source image is discarded. Grayscale JPEG images can be compressed from and decompressed to any of the extended RGB pixel formats or grayscale, or they can be decompressed to YUV planar images. </p>
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<tr><td class="fieldname"><a id="gga4f83ad3368e0e29d1957be0efa7c3720a6c8b636152ac8195b869587db315ee53"></a>TJCS_CMYK </td><td class="fielddoc"><p>CMYK colorspace. </p>
<p>When compressing the JPEG image, the C, M, Y, and K components in the source image are reordered into image planes, but no colorspace conversion or subsampling is performed. CMYK JPEG images can only be decompressed to CMYK pixels. </p>
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<tr><td class="fieldname"><a id="gga4f83ad3368e0e29d1957be0efa7c3720a53839e0fe867b76b58d16b0a1a7c598e"></a>TJCS_YCCK </td><td class="fielddoc"><p>YCCK colorspace. </p>
<p>YCCK (AKA "YCbCrK") is not an absolute colorspace but rather a mathematical transformation of CMYK designed solely for storage and transmission. It is to CMYK as YCbCr is to RGB. CMYK pixels can be reversibly transformed into YCCK, and as with YCbCr, the chrominance components in the YCCK pixels can be subsampled without incurring major perceptual loss. YCCK JPEG images can only be compressed from and decompressed to CMYK pixels. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gafbc17cfa57d0d5d11fea35ac025950fe">◆ </a></span>TJERR</h2>
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<p>Error codes. </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="ggafbc17cfa57d0d5d11fea35ac025950fea342dd6e2aedb47bb257b4e7568329b59"></a>TJERR_WARNING </td><td class="fielddoc"><p>The error was non-fatal and recoverable, but the image may still be corrupt. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gac916144e26c3817ac514e64ae5d12e2a">◆ </a></span>TJPF</h2>
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<p>Pixel formats. </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa7ce93230bff449518ce387c17e6ed37c"></a>TJPF_RGB </td><td class="fielddoc"><p>RGB pixel format. </p>
<p>The red, green, and blue components in the image are stored in 3-byte pixels in the order R, G, B from lowest to highest byte address within each pixel. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aab10624437fb8ef495a0b153e65749839"></a>TJPF_BGR </td><td class="fielddoc"><p>BGR pixel format. </p>
<p>The red, green, and blue components in the image are stored in 3-byte pixels in the order B, G, R from lowest to highest byte address within each pixel. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa83973bebb7e2dc6fa8bae89ff3f42e01"></a>TJPF_RGBX </td><td class="fielddoc"><p>RGBX pixel format. </p>
<p>The red, green, and blue components in the image are stored in 4-byte pixels in the order R, G, B from lowest to highest byte address within each pixel. The X component is ignored when compressing and undefined when decompressing. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa2a1fbf569ca79897eae886e3376ca4c8"></a>TJPF_BGRX </td><td class="fielddoc"><p>BGRX pixel format. </p>
<p>The red, green, and blue components in the image are stored in 4-byte pixels in the order B, G, R from lowest to highest byte address within each pixel. The X component is ignored when compressing and undefined when decompressing. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aaf6603b27147de47e212e75dac027b2af"></a>TJPF_XBGR </td><td class="fielddoc"><p>XBGR pixel format. </p>
<p>The red, green, and blue components in the image are stored in 4-byte pixels in the order R, G, B from highest to lowest byte address within each pixel. The X component is ignored when compressing and undefined when decompressing. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aadae996905efcfa3b42a0bb3bea7f9d84"></a>TJPF_XRGB </td><td class="fielddoc"><p>XRGB pixel format. </p>
<p>The red, green, and blue components in the image are stored in 4-byte pixels in the order B, G, R from highest to lowest byte address within each pixel. The X component is ignored when compressing and undefined when decompressing. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa5431b54b015337705f13118073711a1a"></a>TJPF_GRAY </td><td class="fielddoc"><p>Grayscale pixel format. </p>
<p>Each 1-byte pixel represents a luminance (brightness) level from 0 to 255. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa88d2e88fab67f6503cf972e14851cc12"></a>TJPF_RGBA </td><td class="fielddoc"><p>RGBA pixel format. </p>
<p>This is the same as <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa83973bebb7e2dc6fa8bae89ff3f42e01">TJPF_RGBX</a>, except that when decompressing, the X component is guaranteed to be 0xFF, which can be interpreted as an opaque alpha channel. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aac037ff1845cf9b74bb81a3659c2b9fb4"></a>TJPF_BGRA </td><td class="fielddoc"><p>BGRA pixel format. </p>
<p>This is the same as <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aa2a1fbf569ca79897eae886e3376ca4c8">TJPF_BGRX</a>, except that when decompressing, the X component is guaranteed to be 0xFF, which can be interpreted as an opaque alpha channel. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa1ba1a7f1631dbeaa49a0a85fc4a40081"></a>TJPF_ABGR </td><td class="fielddoc"><p>ABGR pixel format. </p>
<p>This is the same as <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aaf6603b27147de47e212e75dac027b2af">TJPF_XBGR</a>, except that when decompressing, the X component is guaranteed to be 0xFF, which can be interpreted as an opaque alpha channel. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aae8f846ed9d9de99b6e1dfe448848765c"></a>TJPF_ARGB </td><td class="fielddoc"><p>ARGB pixel format. </p>
<p>This is the same as <a class="el" href="group___turbo_j_p_e_g.html#ggac916144e26c3817ac514e64ae5d12e2aadae996905efcfa3b42a0bb3bea7f9d84">TJPF_XRGB</a>, except that when decompressing, the X component is guaranteed to be 0xFF, which can be interpreted as an opaque alpha channel. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa7f5100ec44c91994e243f1cf55553f8b"></a>TJPF_CMYK </td><td class="fielddoc"><p>CMYK pixel format. </p>
<p>Unlike RGB, which is an additive color model used primarily for display, CMYK (Cyan/Magenta/Yellow/Key) is a subtractive color model used primarily for printing. In the CMYK color model, the value of each color component typically corresponds to an amount of cyan, magenta, yellow, or black ink that is applied to a white background. In order to convert between CMYK and RGB, it is necessary to use a color management system (CMS.) A CMS will attempt to map colors within the printer's gamut to perceptually similar colors in the display's gamut and vice versa, but the mapping is typically not 1:1 or reversible, nor can it be defined with a simple formula. Thus, such a conversion is out of scope for a codec library. However, the TurboJPEG API allows for compressing CMYK pixels into a YCCK JPEG image (see <a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720a53839e0fe867b76b58d16b0a1a7c598e" title="YCCK colorspace.">TJCS_YCCK</a>) and decompressing YCCK JPEG images into CMYK pixels. </p>
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<tr><td class="fieldname"><a id="ggac916144e26c3817ac514e64ae5d12e2aa84c1a6cead7952998e2fb895844a21ed"></a>TJPF_UNKNOWN </td><td class="fielddoc"><p>Unknown pixel format. </p>
<p>Currently this is only used by <a class="el" href="group___turbo_j_p_e_g.html#gaffbd83c375e79f5db4b5c5d8ad4466e7" title="Load an uncompressed image from disk into memory.">tjLoadImage()</a>. </p>
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<p>Chrominance subsampling options. </p>
<p>When pixels are converted from RGB to YCbCr (see <a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720a7389b8f65bb387ffedce3efd0d78ec75" title="YCbCr colorspace.">TJCS_YCbCr</a>) or from CMYK to YCCK (see <a class="el" href="group___turbo_j_p_e_g.html#gga4f83ad3368e0e29d1957be0efa7c3720a53839e0fe867b76b58d16b0a1a7c598e" title="YCCK colorspace.">TJCS_YCCK</a>) as part of the JPEG compression process, some of the Cb and Cr (chrominance) components can be discarded or averaged together to produce a smaller image with little perceptible loss of image clarity (the human eye is more sensitive to small changes in brightness than to small changes in color.) This is called "chrominance subsampling". </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="gga1d047060ea80bb9820d540bb928e9074afb8da4f44197837bdec0a4f593dacae3"></a>TJSAMP_444 </td><td class="fielddoc"><p>4:4:4 chrominance subsampling (no chrominance subsampling). </p>
<p>The JPEG or YUV image will contain one chrominance component for every pixel in the source image. </p>
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<tr><td class="fieldname"><a id="gga1d047060ea80bb9820d540bb928e9074a136130902cc578f11f32429b59368404"></a>TJSAMP_422 </td><td class="fielddoc"><p>4:2:2 chrominance subsampling. </p>
<p>The JPEG or YUV image will contain one chrominance component for every 2x1 block of pixels in the source image. </p>
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<tr><td class="fieldname"><a id="gga1d047060ea80bb9820d540bb928e9074a63085dbf683cfe39e513cdb6343e3737"></a>TJSAMP_420 </td><td class="fielddoc"><p>4:2:0 chrominance subsampling. </p>
<p>The JPEG or YUV image will contain one chrominance component for every 2x2 block of pixels in the source image. </p>
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<tr><td class="fieldname"><a id="gga1d047060ea80bb9820d540bb928e9074a3f1c9504842ddc7a48d0f690754b6248"></a>TJSAMP_GRAY </td><td class="fielddoc"><p>Grayscale. </p>
<p>The JPEG or YUV image will contain no chrominance components. </p>
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<tr><td class="fieldname"><a id="gga1d047060ea80bb9820d540bb928e9074accf740e6f3aa6ba20ba922cad13cb974"></a>TJSAMP_440 </td><td class="fielddoc"><p>4:4:0 chrominance subsampling. </p>
<p>The JPEG or YUV image will contain one chrominance component for every 1x2 block of pixels in the source image.</p>
<dl class="section note"><dt>Note</dt><dd>4:4:0 subsampling is not fully accelerated in libjpeg-turbo. </dd></dl>
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<tr><td class="fieldname"><a id="gga1d047060ea80bb9820d540bb928e9074a28ec62575e5ea295c3fde3001dc628e2"></a>TJSAMP_411 </td><td class="fielddoc"><p>4:1:1 chrominance subsampling. </p>
<p>The JPEG or YUV image will contain one chrominance component for every 4x1 block of pixels in the source image. JPEG images compressed with 4:1:1 subsampling will be almost exactly the same size as those compressed with 4:2:0 subsampling, and in the aggregate, both subsampling methods produce approximately the same perceptual quality. However, 4:1:1 is better able to reproduce sharp horizontal features.</p>
<dl class="section note"><dt>Note</dt><dd>4:1:1 subsampling is not fully accelerated in libjpeg-turbo. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ga2de531af4e7e6c4f124908376b354866">◆ </a></span>TJXOP</h2>
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<td class="memname">enum <a class="el" href="group___turbo_j_p_e_g.html#ga2de531af4e7e6c4f124908376b354866">TJXOP</a></td>
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<p>Transform operations for <a class="el" href="group___turbo_j_p_e_g.html#ga9cb8abf4cc91881e04a0329b2270be25" title="Losslessly transform a JPEG image into another JPEG image.">tjTransform()</a> </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866aad88c0366cd3f7d0eac9d7a3fa1c2c27"></a>TJXOP_NONE </td><td class="fielddoc"><p>Do not transform the position of the image pixels. </p>
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<tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866aa0df69776caa30f0fa28e26332d311ce"></a>TJXOP_HFLIP </td><td class="fielddoc"><p>Flip (mirror) image horizontally. </p>
<p>This transform is imperfect if there are any partial MCU blocks on the right edge (see <a class="el" href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00" title="This option will cause tjTransform() to return an error if the transform is not perfect.">TJXOPT_PERFECT</a>.) </p>
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<tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866a324eddfbec53b7e691f61e56929d0d5d"></a>TJXOP_VFLIP </td><td class="fielddoc"><p>Flip (mirror) image vertically. </p>
<p>This transform is imperfect if there are any partial MCU blocks on the bottom edge (see <a class="el" href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00" title="This option will cause tjTransform() to return an error if the transform is not perfect.">TJXOPT_PERFECT</a>.) </p>
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<tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866a31060aed199f886afdd417f80499c32d"></a>TJXOP_TRANSPOSE </td><td class="fielddoc"><p>Transpose image (flip/mirror along upper left to lower right axis.) This transform is always perfect. </p>
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<tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866af3b14d488aea6ece9e5b3df73a74d6a4"></a>TJXOP_TRANSVERSE </td><td class="fielddoc"><p>Transverse transpose image (flip/mirror along upper right to lower left axis.) This transform is imperfect if there are any partial MCU blocks in the image (see <a class="el" href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00" title="This option will cause tjTransform() to return an error if the transform is not perfect.">TJXOPT_PERFECT</a>.) </p>
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<tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866a43b2bbb23bc4bd548422d43fbe9af128"></a>TJXOP_ROT90 </td><td class="fielddoc"><p>Rotate image clockwise by 90 degrees. </p>
<p>This transform is imperfect if there are any partial MCU blocks on the bottom edge (see <a class="el" href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00" title="This option will cause tjTransform() to return an error if the transform is not perfect.">TJXOPT_PERFECT</a>.) </p>
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<tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866a140952eb8dd0300accfcc22726d69692"></a>TJXOP_ROT180 </td><td class="fielddoc"><p>Rotate image 180 degrees. </p>
<p>This transform is imperfect if there are any partial MCU blocks in the image (see <a class="el" href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00" title="This option will cause tjTransform() to return an error if the transform is not perfect.">TJXOPT_PERFECT</a>.) </p>
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<tr><td class="fieldname"><a id="gga2de531af4e7e6c4f124908376b354866a3064ee5dfb7f032df332818587567a08"></a>TJXOP_ROT270 </td><td class="fielddoc"><p>Rotate image counter-clockwise by 90 degrees. </p>
<p>This transform is imperfect if there are any partial MCU blocks on the right edge (see <a class="el" href="group___turbo_j_p_e_g.html#ga50e03cb5ed115330e212417429600b00" title="This option will cause tjTransform() to return an error if the transform is not perfect.">TJXOPT_PERFECT</a>.) </p>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#gaec627dd4c5f30b7a775a7aea3bec5d83">◆ </a></span>tjAlloc()</h2>
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<td class="memname">DLLEXPORT unsigned char* tjAlloc </td>
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<p>Allocate an image buffer for use with TurboJPEG. </p>
<p>You should always use this function to allocate the JPEG destination buffer(s) for the compression and transform functions unless you are disabling automatic buffer (re)allocation (by setting <a class="el" href="group___turbo_j_p_e_g.html#ga8808d403c68b62aaa58a4c1e58e98963" title="Disable buffer (re)allocation.">TJFLAG_NOREALLOC</a>.)</p>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to a newly-allocated buffer with the specified number of bytes.</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group___turbo_j_p_e_g.html#gaea863d2da0cdb609563aabdf9196514b" title="Free an image buffer previously allocated by TurboJPEG.">tjFree()</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ga67ac12fee79073242cb216e07c9f1f90">◆ </a></span>tjBufSize()</h2>
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<td class="memname">DLLEXPORT unsigned long tjBufSize </td>