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/ |
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.