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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