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# Third Party Libraries Used by MuPDF

These are the third party libraries used by MuPDF.

Library | Version | Function | License
--- | --- | --- | ---
Required |  |  |
freetype | 2.13.0 | Font scaling and rendering | BSD-style
harfbuzz | 6.0.0 | Text shaping | MIT-style
libjpeg | 9.0f with patches | JPEG decoding | BSD-style
Incompatible fork of lcms2 | 2.14 with patches | Color management | MIT-style
openjpeg | 2.5.0 | JPEG 2000 decoding | BSD-style
zlib | 1.2.13 | Deflate compression | zlib License
gumbo-parser | 0.10.1 | HTML5 parser | Apache 2.0
Optional |  |  |
FreeGLUT | 3.0.0 with patches | OpenGL API for UI | MIT-style
curl | 7.66.0 with patches | HTTP data transfer | MIT-style
JPEG-XR reference | 1.32 with patches | JPEG-XR decoding | special
Tesseract | 5.3.4 with patches | OCR | Apache 2.0
Leptonica | 1.84.1 with patches | Tesseract dependency | BSD-style

Note

jbig2dec and MuJS are included in “thirdparty” but are copyright Artifex Software Inc.

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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 artifex.com or contact Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco, CA 94129, USA, for further information.