LibJPEG-turbo, version 3.2.0

The Independent JPEG Group's JPEG software

Used in the qjpeg image plugin. Configure with -system-libjpeg or -no-libjpeg to avoid.

The sources can be found in qtbase/src/3rdparty/libjpeg.

Project Homepage, upstream version: 3.2.0

 Copyright (C) 2009-2026 D. R. Commander
 Copyright (C) 1991-1998 Thomas G. Lane
 Copyright (C) 2009 Pierre Ossman for Cendio AB
 Copyright (C) 1999-2006 MIYASAKA Masaru
 Copyright (C) 1999 Ken Murchison
 Copyright (C) 2015-2016, 2018, 2022 Matthieu Darbois
 Copyright (C) 2018 Matthias Räncker
 Copyright (C) 2019-2020 Arm Limited
 Copyright (C) 2022 Felix Hanau
 Copyright (C) 1997-1998 Thomas G. Lane, Todd Newman
 Copyright (C) 2021 Alex Richardson
 Copyright (C) 2015, 2020 Google, Inc.
 Copyright (C) 2013 Linaro Limited
 Copyright (C) 2014 Olle Liljenzin
 Copyright (C) 1991-2020 Thomas G. Lane, Guido Vollbeding

Independent JPEG Group License and BSD 3-Clause "New" or "Revised" License.

 libjpeg-turbo Licenses
 ======================

 libjpeg-turbo is covered by two compatible BSD-style open source licenses:

 - The IJG (Independent JPEG Group) License, which is listed in
   [README.ijg](README.ijg)

   This license applies to the libjpeg API library and associated programs,
   including any code inherited from libjpeg and any modifications to that
   code.

 - The Modified (3-clause) BSD License, which is listed below

   This license applies to the TurboJPEG API library and associated programs,
   [libspng](https://libspng.org) (which is used by cjpeg and djpeg), and the
   build/test system.

   * The TurboJPEG API library wraps the libjpeg API library, so in the context
     of the overall TurboJPEG API library, both the terms of the IJG License and
     the terms of the Modified (3-clause) BSD License apply.
   * cjpeg and djpeg use libspng, so in the context of those programs, both the
     terms of the IJG License and the terms of the Modified (3-clause) BSD
     License apply.


 Component Licenses
 ==================

 Some of libjpeg-turbo's modules and internal dependencies are covered by less
 restrictive licenses, but in the context of libjpeg-turbo as a whole, the terms
 of the less restrictive licenses are subsumed by either the IJG License or the
 Modified BSD License.  (In other words, the terms of the less restrictive
 licenses are satisfied if the terms of the IJG and Modified BSD Licenses are
 satisfied.)

 - The libjpeg-turbo SIMD source code and zlib are covered by the
   [zlib License](https://spdx.org/licenses/Zlib.html), which is subsumed by the
   IJG License in the context of the cjpeg and djpeg programs and the libjpeg
   API library.

 - Some of the libspng source code is covered by the
   [PNG Reference Library License v2](https://spdx.org/licenses/libpng-2.0.html),
   which is subsumed by the IJG License in the context of the cjpeg and djpeg
   programs and the TurboJPEG API library.

 - Most of the libspng source code is covered by the
   [Simplified (2-clause) BSD License](https://spdx.org/licenses/BSD-2-Clause.html),
   which is subsumed by the Modified BSD License in the context of the cjpeg and
   djpeg programs and the TurboJPEG API library.


 Complying with the libjpeg-turbo Licenses
 =========================================

 This section provides a roll-up of the libjpeg-turbo licensing terms, to the
 best of our understanding.  This is not a license in and of itself.  It is
 intended solely for clarification.

 1.  If you are distributing a modified version of the libjpeg-turbo source,
     then:

     1.  You cannot alter or remove any existing copyright or license notices
         from the source.

         **Origin**
         - Clause 1 of the IJG License
         - Clause 1 of the Modified BSD License

     2.  You must add your own copyright notice to the header of each source
         file you modified, so others can tell that you modified that file.  (If
         there is not an existing copyright header in that file, then you can
         simply add a notice stating that you modified the file.)

         **Origin**
         - Clause 1 of the IJG License

     3.  You must include the IJG README file, and you must not alter any of the
         copyright or license text in that file.

         **Origin**
         - Clause 1 of the IJG License

 2.  If you are distributing only libjpeg-turbo binaries without the source, or
     if you are distributing an application that statically links with
     libjpeg-turbo, then:

     1.  Your product documentation must include a message stating:

         This software is based in part on the work of the Independent JPEG
         Group.

         **Origin**
         - Clause 2 of the IJG license

     2.  If your binary distribution includes or uses the TurboJPEG API or
         associated programs, cjpeg, or djpeg, then your product documentation
         must include the text of the Modified BSD License (see below.)

         **Origin**
         - Clause 2 of the Modified BSD License

 3.  You cannot use the name of the IJG or The libjpeg-turbo Project or the
     contributors thereof in advertising, publicity, etc.

     **Origin**
     - IJG License
     - Clause 3 of the Modified BSD License

 4.  The authors and distributors do not warrant libjpeg-turbo to be free of
     defects, nor do we accept any liability for undesirable consequences
     resulting from your use of the software.

     **Origin**
     - IJG License
     - Modified BSD License


 The Modified (3-clause) BSD License
 ===================================

 Copyright (C) 2009-2026 D. R. Commander<br>
 Copyright (C) 2018-2023 Randy <randy408@protonmail.com>

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

 - Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
 - Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 - Neither the name of the libjpeg-turbo Project nor the names of its
   contributors may be used to endorse or promote products derived from this
   software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.

 The authors make NO WARRANTY or representation, either express or implied,
 with respect to this software, its quality, accuracy, merchantability, or
 fitness for a particular purpose.  This software is provided "AS IS", and you,
 its user, assume the entire risk as to its quality and accuracy.

 This software is copyright (C) 1991-2020, Thomas G. Lane, Guido Vollbeding.
 All Rights Reserved except as specified below.

 Permission is hereby granted to use, copy, modify, and distribute this
 software (or portions thereof) for any purpose, without fee, subject to these
 conditions:
 (1) If any part of the source code for this software is distributed, then this
 README file must be included, with this copyright and no-warranty notice
 unaltered; and any additions, deletions, or changes to the original files
 must be clearly indicated in accompanying documentation.
 (2) If only executable code is distributed, then the accompanying
 documentation must state that "this software is based in part on the work of
 the Independent JPEG Group".
 (3) Permission for use of this software is granted only if the user accepts
 full responsibility for any undesirable consequences; the authors accept
 NO LIABILITY for damages of any kind.

 These conditions apply to any software derived from or based on the IJG code,
 not just to the unmodified library.  If you use our work, you ought to
 acknowledge us.

 Permission is NOT granted for the use of any IJG author's name or company name
 in advertising or publicity relating to this software or products derived from
 it.  This software may be referred to only as "the Independent JPEG Group's
 software".

 We specifically permit and encourage the use of this software as the basis of
 commercial products, provided that all warranty or liability claims are
 assumed by the product vendor.

© 2025 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.
The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation.
Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.