Third Party Libraries Used by Ghostscript and GhostPDL

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.

Library Name	Version	Function	License	URL
CUPS (AGPL Release Only)	2.8.0	CUPS raster format output	GPL Version 3	http://www.cups.org/
eXpat	2.4.1	XML parsing for XPS interpreter	MIT/eXpat License	http://expat.sourceforge.net/
FreeType	2.12.1	Font scaling and rendering for Ghostscript	FreeType License (BSD-style license with a credit clause)	http://www.freetype.org/
jbig2dec	0.19	JBIG2 decoding for the PDF interpreter	Licensed with Ghostscript/GhostPDL (copyright owned by Artifex)	http://www.ghostscript.com/
libjpeg	9e with patches	JPEG/DCT decoding/encoding	“Free” Can be used in commercial applications without royalty, with acknowledgement.	http://www.ijg.org/
LittleCMS2 mt (lcms2mt - thread safe fork of lcms2)	2.10mt	ICC profile based color conversion and management	MIT LICENSE	http://www.ghostscript.com/
libpng	1.6.37	PNG image encoding/decoding	libpng license - classified as “a permissive free software license”	http://www.libpng.org/
OpenJPEG	2.4.0	JPEG2000 image decoding for the PDF interpreter	BSD-style	http://www.openjpeg.org/
zlib	1.2.12	(De)Flate compression	zlib license - classified as “a permissive free software license”	http://www.zlib.net/
libtiff	4.3.0	TIFF image encoding/decoding	BSD-style	http://www.remotesensing.org/libtiff

The following are optional.

Library Name

Version

Function

License

URL

tesseract

4.1.0 with patches

Optical Character Recognition (OCR) library

Apache License 2.0

https://github.com/tesseract-ocr/tesseract

leptonica

1.80.0 with patches

Image processing toolkit - support

library for tesseract OCR

Leptonica License

“a permissive free software license”

http://www.leptonica.org/

The following are no-cost, open source licensed, but not GPL compatible.

Library Name

Version

Function

License

URL

jpegxr (JPEG XR reference software)

1.8

HDPhoto/JPEG-XR image

decoding for the XPS interpreter

ITU/ISO/IEC “Free” License

Reference implementation

http://www.itu.int/rec/T-REC-T.835

The following is optional & relevant to Artifex Software commercial releases only.

Library Name

Version

Function

License

URL

Monotype UFST

5.x/6.x with patches

Access, scale and render

Monotype MicroType fonts

Commercial

https://www.monotype.com/

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 https://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.