﻿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 1.0.7, July 1, 2000 through 1.6.32, August 24, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are derived from
libpng-1.0.6, 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
   Mans Rullgard
   Cosmin Truta
   Gilles Vollant
   James Yu
   Mandar Sahastrabuddhe
   Google Inc.
   Vadim Barkov

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.

Some files in the "contrib" directory and some configure-generated files that
are distributed with libpng have other copyright owners and are released under
other open source licenses.

libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are Copyright
(c) 1998-2000 Glenn Randers-Pehrson, are derived from libpng-0.96, 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, are derived from libpng-0.88, and are 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

Some files in the "scripts" directory have other copyright owners but are
released under this license.

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.

END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.

TRADEMARK:

The name "libpng" has not been registered by the Copyright owner as a trademark
in any jurisdiction.  However, because libpng has been distributed and
maintained world-wide, continually since 1995, the Copyright owner claims
"common-law trademark protection" in any jurisdiction where common-law trademark
is recognized.

OSI CERTIFICATION:

Libpng is OSI Certified Open Source Software.  OSI Certified Open Source is a
certification mark of the Open Source Initiative. OSI has not addressed the
additional disclaimers inserted at version 1.0.7.

EXPORT CONTROL:

The Copyright owner believes that the Export Control Classification Number
(ECCN) for libpng is EAR99, which means not subject to export controls or
International Traffic in Arms Regulations (ITAR) because it is open source,
publicly available software, that does not contain any encryption software.  See
the EAR, paragraphs 734.3(b)(3) and 734.7(b).

Glenn Randers-Pehrson
glennrp at users.sourceforge.net
April 1, 2017
