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ghostscript-doc-9.27-1.2.mga7.noarch.rpm

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<p>
This document is news about the most recent Ghostscript release.  For
earlier versions, see the history documents:

<blockquote>
<a href="History9.htm">History of Ghostscript versions 9.n</a><br>
<a href="History8.htm">History of Ghostscript versions 8.n</a><br>
<a href="History7.htm">History of Ghostscript versions 7.n</a><br>
<a href="History6.htm">History of Ghostscript versions 6.n</a><br>
<a href="History5.htm">History of Ghostscript versions 5.n</a><br>
<a href="History4.htm">History of Ghostscript versions 4.n</a><br>
<a href="History3.htm">History of Ghostscript versions 3.n</a><br>
<a href="History2.htm">History of Ghostscript versions 2.n</a><br>
<a href="History1.htm">History of Ghostscript versions 1.n</a>
</blockquote>

<p>For other information, see the <a href="Readme.htm">Ghostscript
overview</a>.

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<h2><a name="Version9.27"></a>Version 9.27 (2019-04-04)</h2>
<p><strong>IMPORTANT:</strong> It is our intention, within the next 12 months (ideally sooner,
in time for the next release) to make SAFER the default mode of operation. For many users
this will have no effect, since they use SAFER explicitly, but some niche uses which rely
on SAFER being disabled may need to start explicitly adding the &quot;-dNOSAFER&quot; option.
<p> Highlights in this release include:
<ul>
<li>
<p>We have extensively cleaned up the Postscript name space: removing access to internal
and/or undocumented Postscript operators, procedures and data. This has benefits for security
and maintainability.
</li>
<li>
<p>We have added a new &quot;product&quot;: &quot;gpdl&quot;. This is a rethink/redesign of the old
&quot;language_switch&quot; product (pspcl6), and includes all the interpreters we
develop based on the Ghostscript graphics library: Postscript, PDF, PCL6, PXL and XPS.
This is experimental, and should be considered of beta testing quality, and thus is not
built by default: it can be built by using the &quot;experimental&quot; target.
<p><code>gpdl</code> uses a heuristic to judge the file type being passed to it. In general,
it supports most of the widely used command line options for each interpreter, but
compatibility is not complete (the practicalities of swapping interpreters means it is
unlikely that full parity of command line options will be possible).
</li>
<li>
<p>Fontmap can now reference invidual fonts in a TrueType Collection for font subsitution.
Previously, a Fontmap entry could only reference a TrueType collection and use the default
(first) font. Now, the Fontmap syntax allows for specifying a specific index in a TTC.
See the comments at the top of (the default) Fontmap.GS for details.
</li>
<li>
<p>IMPORTANT: We are in the process of forking LittleCMS. LCMS2 is not thread safe, and
cannot be made thread safe without breaking the ABI. Our fork will be thread safe, and include
performance enhancements (these changes have all be been offered and rejected upstream). We
will maintain compatibility between Ghostscript and LCMS2 for a time, but not in perpetuity.
Our fork will be available as its own package separately from Ghostscript (and MuPDF).
</li>
<li>
<p>The usual round of bug fixes, compatibility changes, and incremental improvements.
</li>
</ul>
<p>For a list of open issues, or to report problems,
please visit <a href="http://bugs.ghostscript.com/">bugs.ghostscript.com</a>.
<h3><a name="9.27_Incompatible_changes"></a>Incompatible changes</h3>
<ul>
<li>
<p>The process of &quot;tidying&quot; the Postscript name space should have removed
only non-standard and undocumented operators. Nevertheless, it is possible that
any integrations or utilities that rely on those non-standard and undocumented
operators may stop working, or may change behaviour.
<p>If you encounter such a case, please contact us (either the #ghostscript IRC channel,
or the gs-devel mailing list would be best), and we'll work with you to either find an
alternative solution.
<p>One case we know this has occurred is GSView 5 (and earlier). GSView 5 support for PDF
files relied upon internal use only features which are no longer available. GSView 5 will
still work as previously for Postscript files. For PDF files, users are encouraged to look
at <a href="https://www.mupdf.com">MuPDF</a>.
</li>
</ul>
<h3><a name="9.27_changelog"></a>Changelog</h3>

<p>See the <a href="History9.htm">history file</a> for complete log
of changes.

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<p>
<small>Copyright &copy; 2005-2019 Artifex Software, Inc.
All rights reserved.</small>

<p>
This software is provided AS-IS with no warranty, either express or
implied.

This software is distributed under license and may not be copied, modified
or distributed except as expressly authorized under the terms of that
license.  Refer to licensing information at http://www.artifex.com/
or contact Artifex Software, Inc.,  1305 Grant Avenue - Suite 200,
Novato, CA 94945, U.S.A., +1(415)492-9861, for further information.

<p>
<small>Ghostscript version 9.27, 4 April 2019

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