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# Authors

Xfig was originally written by Supoj Sutanthavibul at the University of Texas at Austin in 1985 for SunView. Later, Ken Yap, at Rochester, did the first port of xfig to X11. At some point in 1989, Brian V. Smith picked it up and added features such as multiple fonts, line thickness, area fill etc. Around 1991, Paul King at the University of Queensland, Austrailia added many features and overhauled the look and feel of xfig for version 2.0, to produce essentially what you see today. In 1992, Brian Boyter added the ability to import EPS files, and later it was expanded to import several other bitmap formats as well. T. Sato added the Japanese text support for xfig in 1997.

Brian V. Smith is the main contact for xfig and its incorporation of new features written either by himself or others.

There have been dozens of people who have contributed to the success (and code)of xfig, and they are too numerous to mention here. The man pages list some of those people. See below for the major copyrights.

## Copyright/Permission Notices

### This Documentation

Copyright (c) 1998 by T.Sato and Brian V. Smith

This documentation was first written in Japanese by T.Sato, based on the manual pages distributed with xfig. It was then translated into English with the help of some kind people. Later, it was updated to conform to xfig 3.2 patchlevel 1 by Brian Smith.

Permission to use, copy, and distribute this documentation for any purpose and without fee is hereby granted. However, you may not modify any part of this documentation without explicit permission of T.Sato or Brian V. Smith.

You may also put these documentation files on your `public' WWW server. In such case, please send its URL to Brian V. Smith or T.Sato so that we can hold the list of such WWW servers.

### Xfig

- Original Copyright (c) 1985 by Supoj Sutanthavibul
  Parts Copyright (c) 1989-1998 by Brian V. Smith
  Parts Copyright (c) 1991 by Paul King
  Other Copyrights may be found in various files

  Main Xfig copyright notice:

  Any party obtaining a copy of these files is granted, free of charge, a full and unrestricted irrevocable, world-wide, paid up, royalty-free, nonexclusive right and license to deal in this software and documentation files (the "Software"), including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons who receive copies from any such party to do so, with the only requirement being that this copyright notice remain intact.

  No representations are made about the suitability of this software for any purpose. It is provided ``as is'' without express or implied warranty.

  Restriction: The GIF encoding routine "GIFencode" in f_wrgif.c may NOT be included if xfig is to be sold, due to the patent held by Unisys Corp. on the LZW compression algorithm.

- Parts Copyright (C) 1993 by Alan Richardson (mppa3@uk.ac.sussex.syma)
  The text rotation code in w_rottext.c was written by Alan Richardson. The above copyright notice holds for this work as well.

- Parts Copyright (c) 1994 by Anthony Dekker
  The Kohonen neural network code for color optimization was written by Anthony Dekker.

- Parts Copyright (c) 1995 by C. Blanc and C. Schlick
  The X-Spline code was written Carole Blanc (blanc@labri.u-bordeaux.fr) and Christophe Schlick (schlick@labri.u-bordeaux.fr) starting from an initial implementation done by C. Feuille, S. Grosbois, L. Maziere and L. Minihot as a student practice (Universite Bordeaux, France). For additional information about X-splines, see:
  ``X-Splines: A Spline Model Designed for the End User'' by C. Blanc and C. Schlick, Proceedings of SIGGRAPH'95 http://dept-info.labri.u-bordeaux.fr/~schlick/DOC/sig1.html

#### About GIF Support

Because Unisys has stated that they will not charge royalties for the use of the LZW compression algorithm in FREE programs, xfig will continue to support importing and exporting of GIF images. However, be aware that if you sell xfig, for example as part of a CD-ROM package with freeware, you may be liable for paying royalties to Unisys. It is recommended that you comment out the "`#define USEGIF`" line in the Imakefile before compiling and selling xfig.

*** The authors of xfig and the Lawrence Berkeley Laboratory cannot be held responsible in any case. ***

## Contact

Please send any questions, bug fixes, contributions, and any comments to following destinations.

About this manual or xfig and TransFig themselves (except Japanese support facility)
  --- xfig-bugs@epb1.lbl.gov (Brian V. Smith)

About Japanese support facility
  --- VEF00200@niftyserve.or.jp (T.Sato)

Japanese users can also send questions about xfig or TransFig to VEF00200@niftyserve.or.jp.

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