# Copyright Notices

## XmHTML Widget Set

Copyright © 1996-1997 Ripley Software Development

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details.

You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

See the GNU Library General Public License for the full distribution license.

Portions Copyright © 1990 - 1994, David Koblas. Used by permission.
Portions Copyright © 1994 by John Bradley. Used by permission.

## Other Applicable Copyright Notices

The following copyrights also apply to certain portions of the XmHTML source code.

JPEG image decoding
  Provided by use of libjpeg version 6.
  libjpeg is copyright © 1991, 1992, 1993, 1994, 1995, Thomas G. Lane, The Independent JPEG Group.

PNG image decoding
  Provided by use of libpng version 0.90 and zlib version 1.0.4.
  libpng is Copyright © 1995, 1996, 1997 Guy Eric Schalnat, Group 42, Inc.
  zlib is Copyright © 1995-1996 Jean-loup Gailly and Mark Adler.

GIF87a and GIF89a image decoding
  Based on gifread.c, of which the copyright notice is as follows:

  Copyright © 1990 - 1994, David Koblas. (koblas@netcom.com)
  Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty.

GIF87a and GIF89a LZW Compressed Raster Data Decoding
  The idea for decoding the LZW compressed raster data of gif images using uncompresscomes from Derek B. Noonburg <derekn@ece.cmu.edu>, the author of the excellent xpdf PDF viewing package.

Image Quantization
  Based on ppmquant.c as found in the pbmplus package, of which the copyright notice is as follows:

  Copyright © 1989, 1991 by Jef Poskanzer.

  Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty.

  It also contains the following note to the above:

  Many people get confused by this legalese, especially the part about "without fee". Does this mean you can't charge for any product that uses PBMPLUS? No. All it means is that you don't have to pay me. You can do what you want with this software. Build it into your package, steal code from it, whatever. Just be sure to let people know where it came from.

XImage Creation
  Based on portions of xvimage.c as found in xv 3.10, an excellent image viewing program by John Bradley. Used by permission.

  XV is Copyright © 1989, 1994 by John Bradley.

©Copyright 1996-1997 by Ripley Software Development
Last update: September 19, 1997 by Koen