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89 lines
2.9 KiB
Markdown
89 lines
2.9 KiB
Markdown
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libjpeg-turbo Licenses
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======================
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libjpeg-turbo is covered by three compatible BSD-style open source licenses:
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- The IJG (Independent JPEG Group) License, which is listed in
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[README.ijg](README.ijg)
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This license applies to the libjpeg API library and associated programs
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(any code inherited from libjpeg, and any modifications to that code.)
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- The Modified (3-clause) BSD License, which is listed in
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[turbojpeg.c](turbojpeg.c)
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This license covers the TurboJPEG API library and associated programs.
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- The zlib License, which is listed in [simd/jsimdext.inc](simd/jsimdext.inc)
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This license is a subset of the other two, and it covers the libjpeg-turbo
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SIMD extensions.
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Complying with the libjpeg-turbo Licenses
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=========================================
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This section provides a roll-up of the libjpeg-turbo licensing terms, to the
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best of our understanding.
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1. If you are distributing a modified version of the libjpeg-turbo source,
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then:
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1. You cannot alter or remove any existing copyright or license notices
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from the source.
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**Origin**
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- Clause 1 of the IJG License
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- Clause 1 of the Modified BSD License
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- Clauses 1 and 3 of the zlib License
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2. You must add your own copyright notice to the header of each source
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file you modified, so others can tell that you modified that file (if
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there is not an existing copyright header in that file, then you can
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simply add a notice stating that you modified the file.)
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**Origin**
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- Clause 1 of the IJG License
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- Clause 2 of the zlib License
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3. You must include the IJG README file, and you must not alter any of the
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copyright or license text in that file.
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**Origin**
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- Clause 1 of the IJG License
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2. If you are distributing only libjpeg-turbo binaries without the source, or
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if you are distributing an application that statically links with
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libjpeg-turbo, then:
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1. Your product documentation must include a message stating:
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This software is based in part on the work of the Independent JPEG
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Group.
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**Origin**
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- Clause 2 of the IJG license
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2. If your binary distribution includes or uses the TurboJPEG API, then
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your product documentation must include the text of the Modified BSD
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License.
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**Origin**
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- Clause 2 of the Modified BSD License
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3. You cannot use the name of the IJG or The libjpeg-turbo Project or the
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contributors thereof in advertising, publicity, etc.
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**Origin**
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- IJG License
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- Clause 3 of the Modified BSD License
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4. The IJG and The libjpeg-turbo Project do not warrant libjpeg-turbo to be
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free of defects, nor do we accept any liability for undesirable
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consequences resulting from your use of the software.
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**Origin**
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- IJG License
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- Modified BSD License
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- zlib License
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