Thomas A. Alspaugh
The libjpeg License (for release 8c)
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Source: README file in 8c release (2011Mar01)
The libjpeg license has not been approved by OSI.

At this point it is not clear whether the libjpeg license has had more than one version. This is the version in the current release, 8c.

Words, repeated phrases.


In plain English:

  1. We don't promise that this software works. (But if you find any bugs, please let us know!)
  2. You can use this software for whatever you want. You don't have to pay us.
  3. You may not pretend that you wrote this software. If you use it in a program, you must acknowledge somewhere in your documentation that you've used the IJG code.

In legalese:

¶1¶1ṣ1The 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. ¶1ṣ2This software is provided AS IS, and you, its user, assume the entire risk as to its quality and accuracy.

¶2¶2ṣ1This software is copyright (C) 1991-2011, Thomas G. Lane, Guido Vollbeding. ¶2ṣ2All Rights Reserved except as specified below.

¶3¶3ṣ1Permission is hereby granted to use, copy, modify, and distribute this software (or portions thereof) for any purpose, without fee, subject to these conditions:

  1. (1) ¶3.1¶3.1ṣ1If 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; ṣ1.1and any additions, deletions, or changes to the original files must be clearly indicated in accompanying documentation.
  2. (2) ¶3.2¶3.2ṣ1If 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. (3) ¶3.3¶3.3ṣ1Permission for use of this software is granted only if the user accepts full responsibility for any undesirable consequences; ṣ1.1the authors accept NO LIABILITY for damages of any kind.

¶4¶4ṣ1These conditions apply to any software derived from or based on the IJG code, not just to the unmodified library. ¶4ṣ2If you use our work, you ought to acknowledge us.

¶5¶5ṣ1Permission 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. ¶5ṣ2This software may be referred to only as the Independent JPEG Group's software.

¶6¶6ṣ1We 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.

¶7¶7ṣ1ansi2knr.c is included in this distribution by permission of L. Peter Deutsch, sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, CA. ¶7ṣ2ansi2knr.c is NOT covered by the above copyright and conditions, but instead by the usual distribution terms of the Free Software Foundation; ṣ2.1principally, that you must include source code if you redistribute it. ¶7ṣ3(See the file ansi2knr.c for full details.) ¶7ṣ4However, since ansi2knr.c is not needed as part of any program generated from the IJG code, this does not limit you more than the foregoing paragraphs do.

¶8¶8ṣ1The Unix configuration script configure was produced with GNU Autoconf. ¶8ṣ2It is copyright by the Free Software Foundation but is freely distributable. ¶8ṣ3The same holds for its supporting scripts (config.guess, config.sub, ¶8ṣ4Another support script, install-sh, is copyright by X Consortium but is also freely distributable.

¶9¶9ṣ1The IJG distribution formerly included code to read and write GIF files. ¶9ṣ2To avoid entanglement with the Unisys LZW patent, GIF reading support has been removed altogether, and the GIF writer has been simplified to produce uncompressed GIFs. ¶9ṣ3This technique does not use the LZW algorithm; ṣ3.1the resulting GIF files are larger than usual, but are readable by all standard GIF decoders.

¶10¶10ṣ1We are required to state that

¶11¶11ṣ1The Graphics Interchange Format(c) is the Copyright property of CompuServe Incorporated. ¶11ṣ2GIF(sm) is a Service Mark property of CompuServe Incorporated.

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