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<title>Third Party Libraries Used by Ghostscript and GhostPDL</title>
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<div class="col-12">Third Party Libraries Used by Ghostscript and GhostPDL</div>
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<p>
The table below details the third party libraries that Ghostscript and/or
GhostPDL include, the versions QA tested and shipped with our releases,
the relevant license, and the "upstream" URL.
<p>
<table>
<tr height="60">
<th align="center">Library Name</th>
<th align="center">Version</th>
<th align="center">Function</th>
<th align="center">License</th>
<th align="center">URL</th>
</tr>
<tr height="60">
<td align="center">CUPS<br>
<font size="1">(AGPL Release Only)</font></td>
<td align="center">2.8.0</td>
<td align="center">CUPS raster format output</td>
<td align="center">GPL Version 3</td>
<td align="center"><a href="http://www.cups.org">http://www.cups.org/</a></td>
</tr>
<tr height="60">
<td align="center">eXpat</td>
<td align="center">2.2.9</td>
<td align="center">XML parsing for XPS interpreter</td>
<td align="center">MIT/eXpat License</td>
<td align="center"><a href="http://expat.sourceforge.net/">http://expat.sourceforge.net/</a></td>
</tr>
<tr height="60">
<td align="center">FreeType</td>
<td align="center">2.10.1</td>
<td align="center">Font scaling and rendering for Ghostscript</td>
<td align="center">FreeType License<br>
<font size="1">(BSD-style license with a credit clause)</font></td>
<td align="center"><a href="http://www.freetype.org/">http://www.freetype.org/</a></td>
</tr>
<tr height="60">
<td align="center">jbig2dec</td>
<td align="center">0.17</td>
<td align="center">JBIG2 decoding for the PDF interpreter</td>
<td align="center">Licensed with Ghostscript/GhostPDL<br>
<font size="1">(copyright owned by Artifex)</font></td>
<td align="center"><a href="http://www.ghostscript.com/">http://www.ghostscript.com/</a></td>
</tr>
<tr height="60">
<td align="center">libjpeg</td>
<td align="center">9c<br>
<font size="1">with patches</font></td>
<td align="center">JPEG/DCT decoding/encoding</td>
<td align="center">"Free"<br>
<font size="1">Can be used in commercial applications without royalty, with acknowledgement.</font></td>
<td align="center"><a href="http://www.ijg.org/">http://www.ijg.org/</a></td>
</tr>
<tr height="60">
<td align="center">LittleCMS 2 mt<br>
<font size="1">(lcms2mt – thread save fork of lcms2)</font></td>
<td align="center">2.9mt</td>
<td align="center">ICC profile based color conversion and management</td>
<td align="center">MIT LICENSE</td>
<td align="center"><a href="http://www.ghostscript.com/">http://www.ghostscript.com/</a></td>
</tr>
<tr height="60">
<td align="center">libpng</td>
<td align="center">1.6.37</td>
<td align="center">PNG image encoding/decoding.</td>
<td align="center">libpng license<br>
<font size="1">classified as "a permissive free software license"</font></td>
<td align="center"><a href="http://www.libpng.org/">http://www.libpng.org/</a></td>
</tr>
<tr height="60">
<td align="center">OpenJPEG</td>
<td align="center">2.3.1</td>
<td align="center">JPEG2000 image decoding for the PDF interpreter</td>
<td align="center">BSD-style</td>
<td align="center"><a href="http://www.openjpeg.org/">http://www.openjpeg.org/</a></td>
</tr>
<tr height="60">
<td align="center">libtiff</td>
<td align="center">4.1.0</td>
<td align="center">TIFF image encoding/decoding</td>
<td align="center">BSD-style</td>
<td align="center"><a href="http://www.remotesensing.org/libtiff/">http://www.remotesensing.org/libtiff/</a></td>
</tr>
<tr height="60">
<td align="center">zlib</td>
<td align="center">1.2.11</td>
<td align="center">(De)Flate compression</td>
<td align="center">zlib License<br>
<font size="1">classified as "a permissive free software license"</font></td>
<td align="center"><a href="http://www.zlib.net/">http://www.zlib.net/</a></td>
</tr>
<tr>
<td colspan="5" align="left"><hr>The following are no-cost, open source licensed, but not GPL compatible.<hr></td>
</tr>
<tr height="60">
<td align="center">jpegxr<br>
<font size="1">(JPEG XR reference software)</font></td>
<td align="center">1.8</td>
<td align="center">HDPhoto/JPEG-XR image decoding for the XPS interpreter</td>
<td align="center">ITU/ISO/IEC "Free" License<br>
<font size="1">Reference implementation</font></td>
<td align="center"><a href="http://www.itu.int/rec/T-REC-T.835">http://www.itu.int/rec/T-REC-T.835</a></td>
</tr>
<tr>
<td colspan="5" align="left"><hr>The following are relevant to Artifex Software commercial releases only.<hr></td>
</tr>
<tr height="60">
<td align="center">AGFA UFST<br>
<font size="1">Optional</font></td>
<td align="center">5.x/6.x<br>
<font size="1">with patches</font></td>
<td align="center">Access, scale and render AGFA MicroType fonts</td>
<td align="center">Commercial</td>
<td align="center"><a href="http://www.monotypeimaging.com/">http://www.monotypeimaging.com/</a></td>
</tr>
<tr height="60">
<td align="center">Luratech LuraDocument JBIG2 C-SDK <br>
<font size="1">Included in commercial release</font></td>
<td align="center">1.08<br>
<font size="1">with patches</font></td>
<td align="center">Replacement JBIG2 image decoder for the PDF interpreter</td>
<td align="center">Commercial</td>
<td align="center"><a href="http://www.luratech.com/">http://www.luratech.com/</a></td>
</tr>
<tr height="60">
<td align="center">Luratech LuraWave JP2 C-SDK<br>
<font size="1">Included in commercial release</font></td>
<td align="center">2.10<br>
<font size="1">with patches</font></td>
<td align="center">Replacement JPEG2000 image decoder for the PDF interpreter</td>
<td align="center">Commercial</td>
<td align="center"><a href="http://www.luratech.com/">http://www.luratech.com/</a></td>
</tr>
<tr height="60">
<td align="center">LittleCMS<br>
<font size="1">(lcms2)</font></td>
<td align="center">1.1.8<br>
<font size="1">with patches</font></td>
<td align="center">ICC profile base color conversion and management</td>
<td align="center">MIT LICENSE</td>
<td align="center"><a href="http://www.littlecms.com/">http://www.littlecms.com/</a></td>
</tr>
</table>
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<small>Ghostscript version 9.52.1, 29 July 2020
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