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