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cnq3/code/libjpeg-turbo/LICENSE.md
arQon fc9465caab switch from jpeg6 to jpeg-turbo 
aside from the speed improvements, this also makes for nicer code
in the renderer interaction with libjpeg, thanks to mem_dest support etc
2017-01-03 00:34:59 -08:00

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libjpeg-turbo Licenses

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

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

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

  • The Modified (3-clause) BSD License, which is listed in turbojpeg.c

    This license covers the TurboJPEG API library and associated programs.

  • The zlib License, which is listed in simd/jsimdext.inc

    This license is a subset of the other two, and it covers the libjpeg-turbo SIMD extensions.

Complying with the libjpeg-turbo Licenses

This section provides a roll-up of the libjpeg-turbo licensing terms, to the best of our understanding.

  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
      • Clauses 1 and 3 of the zlib 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
      • Clause 2 of the zlib 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, then your product documentation must include the text of the Modified BSD License.

      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 IJG and The libjpeg-turbo Project 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
    • zlib License