1<HTML> 2<HEAD> 3<TITLE> 4Acknowledgments and Other Issues 5</TITLE> 6</HEAD> 7<BODY BGCOLOR=white> 8<FONT FACE="Arial, Helvetica, Sans"> 9<H1> 10<IMG SRC=images/ring.gif WIDTH=124 HEIGHT=124 ALIGN=left BORDER=1 HSPACE=6> 11Acknowledgments and Other Issues 12</H1> 13 14<P> 15Silicon Graphics has seen fit to allow me to give this work away. It 16is free. There is no support or guarantee of any sort as to its 17operations, correctness, or whatever. If you do anything useful with 18all or parts of it you need to honor the copyright notices. I would 19also be interested in knowing about it and, hopefully, be acknowledged. 20 21<BR CLEAR=left> 22 23 24<H2>Acknowledgements</H2> 25 26The LZW algorithm is derived from the compress program (the proper 27attribution is included in the source code). The Group 3 fax stuff 28originated as code from Jef Poskanzer, but has since been rewritten 29several times. The latest version uses an algorithm from Frank 30Cringle -- consult <TT>libtiff/mkg3states.c</TT> and 31<TT>libtiff/tif_fax3.h</TT> for further information. 32The JPEG support was written by Tom Lane and is dependent on the 33excellent work of Tom Lane and the Independent JPEG Group (IJG) 34who distribute their work under friendly licensing similar to this 35software. 36Many other people have by now helped with bug fixes and code; a 37few of the more persistent contributors have been: 38 39<PRE> 40 Bjorn P. Brox Dan McCoy 41 J.T. Conklin Richard Minner 42 Frank D. Cringle Richard Mlynarik 43 Soren Pingel Dalsgaard Niles Ritter 44 Steve Johnson Karsten Spang 45 Tom Lane 46</PRE> 47 48(my apology to anyone that was inadvertently not listed.) 49 50<H2>Warning</H2> 51 52It appears that Unisys is actively pursuing copyright control on the 53LZW compression algorithm. In particular, users of the LZW compression 54within the TIFF framework. For this reason the TIFF 6.0 spec states 55that LZW compression is not recommended. It is unclear at this time 56what compression algorithm will be used in place of it. I have no idea 57what this means to you or to this library. I make no warranty or 58guarantees with regard to the LZW support in this library. 59 60 61<H2>Use and Copyright</H2> 62 63<P><H5><PRE> 64Copyright (c) 1988-1997 Sam Leffler 65Copyright (c) 1991-1997 Silicon Graphics, Inc. 66 67Permission to use, copy, modify, distribute, and sell this software and 68its documentation for any purpose is hereby granted without fee, provided 69that (i) the above copyright notices and this permission notice appear in 70all copies of the software and related documentation, and (ii) the names of 71Sam Leffler and Silicon Graphics may not be used in any advertising or 72publicity relating to the software without the specific, prior written 73permission of Sam Leffler and Silicon Graphics. 74 75THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 76EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 77WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 78 79IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR 80ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, 81OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 82WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 83LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 84OF THIS SOFTWARE. 85</PRE></H5> 86 87<P> 88<HR> 89 90 91Last updated: $Date: 1999-08-13 19:30:57 $ 92</BODY> 93</HTML> 94
