forgejo/options/license/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 1.4.5, December 9, 2010, are
Copyright (c) 2004, 2006-2010 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 versions 1.0.7, July 1, 2000, through 1.2.5 - 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.  There is no warranty that our efforts or the library
will fulfill any of your 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 versions 0.97, 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 Digger
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
     Sam Bushell
     Magnus Holmgren
     Greg Roelofs
     Tom Tanner

libpng versions 0.5, May 1995, through 0.88, January 1996, are
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.

For the purposes of this copyright and license, "Contributing Authors" is
defined as the following set of individuals:

     Andreas Dilger
     Dave Martindale
     Guy Eric Schalnat
     Paul Schmidt
     Tim Wegner

The PNG Reference Library is supplied "AS IS".  The Contributing Authors and
Group 42, Inc. disclaim all warranties, expressed or implied, including, without
limitation, the warranties of merchantability and of fitness for any purpose.
The Contributing Authors and Group 42, Inc. assume no liability for direct,
indirect, incidental, special, exemplary, or consequential damages, which
may result from the use of the PNG Reference Library, even if advised of the
possibility of such damage.

Permission is hereby granted to use, copy, modify, and distribute this source
code, or portions hereof, for any purpose, without fee, subject to the following
restrictions:

1. The origin of this source code must not be misrepresented.

2. Altered versions must be plainly marked as such and must not be misrepresented
as being the original source.

3. This Copyright notice may not be removed or altered from any source or
altered source distribution.

The Contributing Authors and Group 42, Inc. specifically permit, without fee,
and encourage the use of this source code as a component to supporting the
PNG file format in commercial products.  If you use this source code in a
product, acknowledgment is not required but would be appreciated.


A "png_get_copyright" function is available, for convenient use in "about"
boxes and the like:

     printf("%s",png_get_copyright(NULL));

Also, the PNG logo (in PNG format, of course) is supplied in the files "pngbar.png"
and "pngbar.jpg (88x31) and "pngnow.png" (98x31).

Libpng is OSI Certified Open Source Software.  OSI Certified Open Source is
a certification mark of the Open Source Initiative.

Glenn Randers-Pehrson
glennrp at users.sourceforge.net
December 9, 2010