1
  2This copy of the libpng notices is provided for your convenience.  In case of
  3any discrepancy between this copy and the notices in the file png.h that is
  4included in the libpng distribution, the latter shall prevail.
  5
  6COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
  7
  8If you modify libpng you may insert additional notices immediately following
  9this sentence.
 10
 11This code is released under the libpng license.
 12
 13libpng versions 1.0.7, July 1, 2000 through 1.6.34, September 29, 2017 are
 14Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 15derived from libpng-1.0.6, and are distributed according to the same
 16disclaimer and license as libpng-1.0.6 with the following individuals
 17added to the list of Contributing Authors:
 18
 19   Simon-Pierre Cadieux
 20   Eric S. Raymond
 21   Mans Rullgard
 22   Cosmin Truta
 23   Gilles Vollant
 24   James Yu
 25   Mandar Sahastrabuddhe
 26   Google Inc.
 27   Vadim Barkov
 28
 29and with the following additions to the disclaimer:
 30
 31   There is no warranty against interference with your enjoyment of the
 32   library or against infringement.  There is no warranty that our
 33   efforts or the library will fulfill any of your particular purposes
 34   or needs.  This library is provided with all faults, and the entire
 35   risk of satisfactory quality, performance, accuracy, and effort is with
 36   the user.
 37
 38Some files in the "contrib" directory and some configure-generated
 39files that are distributed with libpng have other copyright owners and
 40are released under other open source licenses.
 41
 42libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
 43Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
 44libpng-0.96, and are distributed according to the same disclaimer and
 45license as libpng-0.96, with the following individuals added to the list
 46of Contributing Authors:
 47
 48   Tom Lane
 49   Glenn Randers-Pehrson
 50   Willem van Schaik
 51
 52libpng versions 0.89, June 1996, through 0.96, May 1997, are
 53Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
 54and are distributed according to the same disclaimer and license as
 55libpng-0.88, with the following individuals added to the list of
 56Contributing Authors:
 57
 58   John Bowler
 59   Kevin Bracey
 60   Sam Bushell
 61   Magnus Holmgren
 62   Greg Roelofs
 63   Tom Tanner
 64
 65Some files in the "scripts" directory have other copyright owners
 66but are released under this license.
 67
 68libpng versions 0.5, May 1995, through 0.88, January 1996, are
 69Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
 70
 71For the purposes of this copyright and license, "Contributing Authors"
 72is defined as the following set of individuals:
 73
 74   Andreas Dilger
 75   Dave Martindale
 76   Guy Eric Schalnat
 77   Paul Schmidt
 78   Tim Wegner
 79
 80The PNG Reference Library is supplied "AS IS".  The Contributing Authors
 81and Group 42, Inc. disclaim all warranties, expressed or implied,
 82including, without limitation, the warranties of merchantability and of
 83fitness for any purpose.  The Contributing Authors and Group 42, Inc.
 84assume no liability for direct, indirect, incidental, special, exemplary,
 85or consequential damages, which may result from the use of the PNG
 86Reference Library, even if advised of the possibility of such damage.
 87
 88Permission is hereby granted to use, copy, modify, and distribute this
 89source code, or portions hereof, for any purpose, without fee, subject
 90to the following restrictions:
 91
 92  1. The origin of this source code must not be misrepresented.
 93
 94  2. Altered versions must be plainly marked as such and must not
 95     be misrepresented as being the original source.
 96
 97  3. This Copyright notice may not be removed or altered from any
 98     source or altered source distribution.
 99
100The Contributing Authors and Group 42, Inc. specifically permit, without
101fee, and encourage the use of this source code as a component to
102supporting the PNG file format in commercial products.  If you use this
103source code in a product, acknowledgment is not required but would be
104appreciated.
105
106END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
107
108TRADEMARK:
109
110The name "libpng" has not been registered by the Copyright owner
111as a trademark in any jurisdiction.  However, because libpng has
112been distributed and maintained world-wide, continually since 1995,
113the Copyright owner claims "common-law trademark protection" in any
114jurisdiction where common-law trademark is recognized.
115
116OSI CERTIFICATION:
117
118Libpng is OSI Certified Open Source Software.  OSI Certified Open Source is
119a certification mark of the Open Source Initiative. OSI has not addressed
120the additional disclaimers inserted at version 1.0.7.
121
122EXPORT CONTROL:
123
124The Copyright owner believes that the Export Control Classification
125Number (ECCN) for libpng is EAR99, which means not subject to export
126controls or International Traffic in Arms Regulations (ITAR) because
127it is open source, publicly available software, that does not contain
128any encryption software.  See the EAR, paragraphs 734.3(b)(3) and
129734.7(b).
130
131Glenn Randers-Pehrson
132glennrp at users.sourceforge.net
133September 29, 2017