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.. title:: Third Party Libraries Used by Ghostscript and GhostPDL
.. meta::
:description: The Ghostscript documentation
:keywords: Ghostscript, documentation, ghostpdl
.. _thirdparty.htm:
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.
.. list-table::
:header-rows: 1
:widths: 20 10 25 25 20
* - 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.
.. list-table::
:header-rows: 1
:widths: 20 10 25 25 20
* - 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.
.. list-table::
:header-rows: 1
:widths: 20 10 25 25 20
* - 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.
.. list-table::
:header-rows: 1
:widths: 20 10 25 25 20
* - 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/
.. include:: footer.rst
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