1<HTML> 2<HEAD> 3<TITLE> 4Acknowledgments and Other Issues 5</TITLE> 6</HEAD> 7 8<H1> 9<IMG SRC=images/ring.gif WIDTH=124 HEIGHT=124 ALIGN=left BORDER=1 HSPACE=6> 10Acknowledgments and Other Issues 11</H1> 12 13<P> 14Silicon Graphics has seen fit to allow me to give this work away. It 15is free. There is no support or guarantee of any sort as to its 16operations, correctness, or whatever. If you do anything useful with 17all or parts of it you need to honor the copyright notices. I would 18also be interested in knowing about it and, hopefully, be acknowledged. 19 20<BR CLEAR=left> 21 22 23<H2>Acknowledgements</H2> 24 25The LZW algorithm is derived from the compress program (the proper 26attribution is included in the source code). The Group 3 fax stuff 27originated as code from Jef Poskanzer, but has since been rewritten 28several times. The latest version uses an algorithm from Frank 29Cringle -- consult <TT>libtiff/mkg3states.c</TT> and 30<TT>libtiff/tif_fax3.h</TT> for further information. 31The JPEG support was written by Tom Lane and is dependent on the 32excellent work of Tom Lane and the Independent JPEG Group (IJG) 33who distribute their work under friendly licensing similar to this 34software. 35Many other people have by now helped with bug fixes and code; a 36few of the more persistent contributors have been: 37 38<PRE> 39 Bjorn P. Brox Dan McCoy 40 J.T. Conklin Richard Minner 41 Frank D. Cringle Richard Mlynarik 42 Soren Pingel Dalsgaard Niles Ritter 43 Steve Johnson Karsten Spang 44 Tom Lane 45</PRE> 46 47(my apology to anyone that was inadvertently not listed.) 48 49<H2>Warning</H2> 50 51It appears that Unisys is actively pursuing copyright control on the 52LZW compression algorithm. In particular, users of the LZW compression 53within the TIFF framework. For this reason the TIFF 6.0 spec states 54that LZW compression is not recommended. It is unclear at this time 55what compression algorithm will be used in place of it. I have no idea 56what this means to you or to this library. I make no warranty or 57guarantees with regard to the LZW support in this library. 58 59 60<H2>Use and Copyright</H2> 61 62<P><H5><PRE> 63Copyright (c) 1988-1997 Sam Leffler 64Copyright (c) 1991-1997 Silicon Graphics, Inc. 65 66Permission to use, copy, modify, distribute, and sell this software and 67its documentation for any purpose is hereby granted without fee, provided 68that (i) the above copyright notices and this permission notice appear in 69all copies of the software and related documentation, and (ii) the names of 70Sam Leffler and Silicon Graphics may not be used in any advertising or 71publicity relating to the software without the specific, prior written 72permission of Sam Leffler and Silicon Graphics. 73 74THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 75EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 76WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 77 78IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR 79ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, 80OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 81WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 82LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 83OF THIS SOFTWARE. 84</PRE></H5> 85 86<P> 87<HR> 88 89<ADDRESS> 90<A HREF="sam.html">Sam Leffler</A> / <A HREF="mailto:[email protected]">[email protected]</A>. 91Last updated: $Date: 1999-08-09 20:21:21 $ 92</ADDRESS> 93 94</BODY> 95<FONT FACE="Arial, Helvetica, Sans"> 96</HTML> 97
