mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-12 12:51:25 +01:00
86 lines
4.1 KiB
Text
86 lines
4.1 KiB
Text
Independent JPEG Group License LEGAL ISSUES
|
|
|
|
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:
|
|
|
|
The 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. This software is provided "AS IS", and you,
|
|
its user, assume the entire risk as to its quality and accuracy.
|
|
|
|
This software is copyright (C) 1991-1998, Thomas G. Lane. All Rights Reserved
|
|
except as specified below.
|
|
|
|
Permission is hereby granted to use, copy, modify, and distribute this software
|
|
(or portions thereof) for any purpose, without fee, subject to these conditions:
|
|
|
|
(1) If 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; and any additions, deletions, or changes to the original files
|
|
must be clearly indicated in accompanying documentation.
|
|
|
|
(2) If 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) Permission for use of this software is granted only if the user accepts
|
|
full responsibility for any undesirable consequences; the authors accept NO
|
|
LIABILITY for damages of any kind.
|
|
|
|
These conditions apply to any software derived from or based on the IJG code,
|
|
not just to the unmodified library. If you use our work, you ought to acknowledge
|
|
us.
|
|
|
|
Permission 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. This software may be referred to only as "the Independent JPEG Group's
|
|
software".
|
|
|
|
We 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.
|
|
|
|
ansi2knr.c is included in this distribution by permission of L. Peter Deutsch,
|
|
sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park,
|
|
CA. ansi2knr.c is NOT covered by the above copyright and conditions, but instead
|
|
by the usual distribution terms of the Free Software Foundation; principally,
|
|
that you must include source code if you redistribute it. (See the file ansi2knr.c
|
|
for full details.) However, 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.
|
|
|
|
The Unix configuration script "configure" was produced with GNU Autoconf.
|
|
It is copyright by the Free Software Foundation but is freely distributable.
|
|
The same holds for its supporting scripts (config.guess, config.sub, ltconfig,
|
|
ltmain.sh). Another support script, install-sh, is copyright by M.I.T. but
|
|
is also freely distributable.
|
|
|
|
It appears that the arithmetic coding option of the JPEG spec is covered by
|
|
patents owned by IBM, AT&T, and Mitsubishi. Hence arithmetic coding cannot
|
|
legally be used without obtaining one or more licenses. For this reason, support
|
|
for arithmetic coding has been removed from the free JPEG software. (Since
|
|
arithmetic coding provides only a marginal gain over the unpatented Huffman
|
|
mode, it is unlikely that very many implementations will support it.) So far
|
|
as we are aware, there are no patent restrictions on the remaining code.
|
|
|
|
The IJG distribution formerly included code to read and write GIF files. To
|
|
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". This technique does not use the LZW algorithm; the resulting GIF files
|
|
are larger than usual, but are readable by all standard GIF decoders.
|
|
|
|
We are required to state that
|
|
|
|
"The Graphics Interchange Format(c) is the Copyright property of CompuServe
|
|
Incorporated. GIF(sm) is a Service Mark property of CompuServe Incorporated."
|