# Changes in the most recent release of Ghostscript

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

> History of Ghostscript versions 9.n
> History of Ghostscript versions 8.n
> History of Ghostscript versions 7.n
> History of Ghostscript versions 6.n
> History of Ghostscript versions 5.n
> History of Ghostscript versions 4.n
> History of Ghostscript versions 3.n
> History of Ghostscript versions 2.n
> History of Ghostscript versions 1.n

For other information, see the Ghostscript overview.

## Version 9.16 (2015-03-30)

This is the twelfth full release in the stable 9.x series, and is primarily a maintenance release.

Highlights in this release include:

- "LockColorants" command line option for tiffsep and psdcmyk devices. Specifying -dLockColorants will restrict those devices to only the colorants list on the command line (thus: -c "<< /SeparationColorNames [ /Cyan /Magenta /Yellow /Black /Violet /Orange] /SeparationOrder [ /Cyan /Magenta /Yellow /Black /Violet /Orange]>> setpagedevice"), rather than allowing the devices to add new colorants as encountered in the input. This is, obviously, preferable for real printers, where only a certain of inks will be available.

- Improved high level devices handling of Forms. Whilst High level devices (eg pdfwrite) already checked Forms to see if they are duplicates, and if so use the initial definition. However, this does not improve performance, since the Form PaintProc still needs to be executed for each instance of the Form, and the matching algorithm could, in very odd circumstances, be defeated. The new implementation benefits both causes, meaning the second and subsequent invocation of the form need not re-run the PaintProc, and removes the heurisic aspect of the reuse detection.

- New URW+ fonts in which the families NimbusMono, NimbusRoman and NimbusSans have been augmented with production quality Greek and Cyrillic glyphs. These correspond to our substitutes for the PDF base 14 fonts.

- Plus the usual round of bug fixes, compatibility changes, and incremental improvements.

For a list of open issues, or to report problems, please visit bugs.ghostscript.com.

### Incompatible changes

No recorded incompatible changes.

### Changelog

See the history file for complete log of changes.

Copyright © 2005-2015 Artifex Software, Inc. All rights reserved.

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., 7 Mt. Lassen Drive - Suite A-134, San Rafael, CA 94903, U.S.A., +1(415)492-9861, for further information.

Ghostscript version 9.16, 30 March 2015