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The IJG distribution formerly included code to read and write GIF files. To avoid entanglement
with the Unisys LZW patent, GIF reading support has been removed altogether, and the GIF
writer has been simplifiedto produce uncompressed GIFs. Thistechnique does not use theLZW
algorithm; the resulting GIF files are larger than usual, but are readable by all standard GIF
decoders.
We are required to state that "The Graphics Interchange Format(c) is the Copyright property of
CompuServe Incorporated. GIF(sm) is a Service Mark property of CompuServe Incorporated."
libpng
This copy of the libpng notices is provided for your convenience. In case of any discrepancy
between this copy and the notices in the file png.h that is included in the libpng distribution, the
latter shall prevail.
COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
If you modify libpng you may insert additional notices immediately following this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.5.7, December 15, 2011, are Copyright (c)
2004, 2006-2011 Glenn Randers-Pehrson, and are distributed according to the same disclaimer
and license as libpng-1.2.5 with the following individual added to the list of Contributing
Authors
Cosmin Truta
libpng versions1.0.7, July1, 2000, through1.2.5 -October 3,2002, are Copyright(c) 2000-2002
Glenn Randers-Pehrson, and are distributed according to the same disclaimer and license as
libpng-1.0.6 with the following individuals added to the list of Contributing Authors
Simon-Pierre Cadieux
Eric S. Raymond
Gilles Vollant
and with the following additions to the disclaimer:
There is no warranty against interference with your enjoyment of the library or against
infringement. Thereis no warrantythat ourefforts or thelibrary will fulfillany ofyour particular
purposes or needs. This library is provided with all faults, and the entire risk of satisfactory
quality, performance, accuracy, and effort is with the user.
libpng versions0.97, January 1998,through 1.0.6,March 20, 2000,are Copyright(c) 1998, 1999
Glenn Randers-Pehrson, and are distributed according to the same disclaimer and license as
libpng-0.96, with the following individuals added to the list of Contributing Authors:
Tom Lane
Glenn Randers-Pehrson
Willem van Schaik
libpng versions 0.89, June 1996, through 0.96, May 1997, are Copyright (c) 1996,
1997 Andreas Dilger Distributed according to the same disclaimer and license as
libpng-0.88, with the following individuals added to the list of Contributing Authors:
John Bowler
Kevin Bracey