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      1 libjpeg-turbo Licenses
      2 ======================
      3 
      4 libjpeg-turbo is covered by three compatible BSD-style open source licenses:
      5 
      6 - The IJG (Independent JPEG Group) License, which is listed in
      7   [README.ijg](README.ijg)
      8 
      9   This license applies to the libjpeg API library and associated programs
     10   (any code inherited from libjpeg, and any modifications to that code.)
     11 
     12 - The Modified (3-clause) BSD License, which is listed in
     13   [turbojpeg.c](turbojpeg.c)
     14 
     15   This license covers the TurboJPEG API library and associated programs.
     16 
     17 - The zlib License, which is listed in [simd/jsimdext.inc](simd/jsimdext.inc)
     18 
     19   This license is a subset of the other two, and it covers the libjpeg-turbo
     20   SIMD extensions.
     21 
     22 
     23 Complying with the libjpeg-turbo Licenses
     24 =========================================
     25 
     26 This section provides a roll-up of the libjpeg-turbo licensing terms, to the
     27 best of our understanding.
     28 
     29 1.  If you are distributing a modified version of the libjpeg-turbo source,
     30     then:
     31 
     32     1.  You cannot alter or remove any existing copyright or license notices
     33         from the source.
     34 
     35         **Origin**
     36         - Clause 1 of the IJG License
     37         - Clause 1 of the Modified BSD License
     38         - Clauses 1 and 3 of the zlib License
     39 
     40     2.  You must add your own copyright notice to the header of each source
     41         file you modified, so others can tell that you modified that file (if
     42         there is not an existing copyright header in that file, then you can
     43         simply add a notice stating that you modified the file.)
     44 
     45         **Origin**
     46         - Clause 1 of the IJG License
     47         - Clause 2 of the zlib License
     48 
     49     3.  You must include the IJG README file, and you must not alter any of the
     50         copyright or license text in that file.
     51 
     52         **Origin**
     53         - Clause 1 of the IJG License
     54 
     55 2.  If you are distributing only libjpeg-turbo binaries without the source, or
     56     if you are distributing an application that statically links with
     57     libjpeg-turbo, then:
     58 
     59     1.  Your product documentation must include a message stating:
     60 
     61         This software is based in part on the work of the Independent JPEG
     62         Group.
     63 
     64         **Origin**
     65         - Clause 2 of the IJG license
     66 
     67     2.  If your binary distribution includes or uses the TurboJPEG API, then
     68         your product documentation must include the text of the Modified BSD
     69         License.
     70 
     71         **Origin**
     72         - Clause 2 of the Modified BSD License
     73 
     74 3.  You cannot use the name of the IJG or The libjpeg-turbo Project or the
     75     contributors thereof in advertising, publicity, etc.
     76 
     77     **Origin**
     78     - IJG License
     79     - Clause 3 of the Modified BSD License
     80 
     81 4.  The IJG and The libjpeg-turbo Project do not warrant libjpeg-turbo to be
     82     free of defects, nor do we accept any liability for undesirable
     83     consequences resulting from your use of the software.
     84 
     85     **Origin**
     86     - IJG License
     87     - Modified BSD License
     88     - zlib License
     89