1 (Copied from the README.) 2 3 -------------------------------------------------------------------------------- 4 5 The authors make NO WARRANTY or representation, either express or implied, 6 with respect to this software, its quality, accuracy, merchantability, or 7 fitness for a particular purpose. This software is provided "AS IS", and you, 8 its user, assume the entire risk as to its quality and accuracy. 9 10 This software is copyright (C) 1991-1998, Thomas G. Lane. 11 All Rights Reserved except as specified below. 12 13 Permission is hereby granted to use, copy, modify, and distribute this 14 software (or portions thereof) for any purpose, without fee, subject to these 15 conditions: 16 (1) If any part of the source code for this software is distributed, then this 17 README file must be included, with this copyright and no-warranty notice 18 unaltered; and any additions, deletions, or changes to the original files 19 must be clearly indicated in accompanying documentation. 20 (2) If only executable code is distributed, then the accompanying 21 documentation must state that "this software is based in part on the work of 22 the Independent JPEG Group". 23 (3) Permission for use of this software is granted only if the user accepts 24 full responsibility for any undesirable consequences; the authors accept 25 NO LIABILITY for damages of any kind. 26 27 These conditions apply to any software derived from or based on the IJG code, 28 not just to the unmodified library. If you use our work, you ought to 29 acknowledge us. 30 31 Permission is NOT granted for the use of any IJG author's name or company name 32 in advertising or publicity relating to this software or products derived from 33 it. This software may be referred to only as "the Independent JPEG Group's 34 software". 35 36 We specifically permit and encourage the use of this software as the basis of 37 commercial products, provided that all warranty or liability claims are 38 assumed by the product vendor. 39 40 41 ansi2knr.c is included in this distribution by permission of L. Peter Deutsch, 42 sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, CA. 43 ansi2knr.c is NOT covered by the above copyright and conditions, but instead 44 by the usual distribution terms of the Free Software Foundation; principally, 45 that you must include source code if you redistribute it. (See the file 46 ansi2knr.c for full details.) However, since ansi2knr.c is not needed as part 47 of any program generated from the IJG code, this does not limit you more than 48 the foregoing paragraphs do. 49 50 The Unix configuration script "configure" was produced with GNU Autoconf. 51 It is copyright by the Free Software Foundation but is freely distributable. 52 The same holds for its supporting scripts (config.guess, config.sub, 53 ltconfig, ltmain.sh). Another support script, install-sh, is copyright 54 by M.I.T. but is also freely distributable. 55 56 It appears that the arithmetic coding option of the JPEG spec is covered by 57 patents owned by IBM, AT&T, and Mitsubishi. Hence arithmetic coding cannot 58 legally be used without obtaining one or more licenses. For this reason, 59 support for arithmetic coding has been removed from the free JPEG software. 60 (Since arithmetic coding provides only a marginal gain over the unpatented 61 Huffman mode, it is unlikely that very many implementations will support it.) 62 So far as we are aware, there are no patent restrictions on the remaining 63 code. 64 65 The IJG distribution formerly included code to read and write GIF files. 66 To avoid entanglement with the Unisys LZW patent, GIF reading support has 67 been removed altogether, and the GIF writer has been simplified to produce 68 "uncompressed GIFs". This technique does not use the LZW algorithm; the 69 resulting GIF files are larger than usual, but are readable by all standard 70 GIF decoders. 71 72 We are required to state that 73 "The Graphics Interchange Format(c) is the Copyright property of 74 CompuServe Incorporated. GIF(sm) is a Service Mark property of 75 CompuServe Incorporated." 76
