1COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
2=========================================
3
4PNG Reference Library License version 2
5---------------------------------------
6
7 * Copyright (c) 1995-2019 The PNG Reference Library Authors.
8 * Copyright (c) 2018-2019 Cosmin Truta.
9 * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson.
10 * Copyright (c) 1996-1997 Andreas Dilger.
11 * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
12
13The software is supplied "as is", without warranty of any kind,
14express or implied, including, without limitation, the warranties
15of merchantability, fitness for a particular purpose, title, and
16non-infringement.  In no event shall the Copyright owners, or
17anyone distributing the software, be liable for any damages or
18other liability, whether in contract, tort or otherwise, arising
19from, out of, or in connection with the software, or the use or
20other dealings in the software, even if advised of the possibility
21of such damage.
22
23Permission is hereby granted to use, copy, modify, and distribute
24this software, or portions hereof, for any purpose, without fee,
25subject to the following restrictions:
26
27 1. The origin of this software must not be misrepresented; you
28    must not claim that you wrote the original software.  If you
29    use this software in a product, an acknowledgment in the product
30    documentation would be appreciated, but is not required.
31
32 2. Altered source versions must be plainly marked as such, and must
33    not be misrepresented as being the original software.
34
35 3. This Copyright notice may not be removed or altered from any
36    source or altered source distribution.
37
38
39PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35)
40-----------------------------------------------------------------------
41
42libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018 are
43Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are
44derived from libpng-1.0.6, and are distributed according to the same
45disclaimer and license as libpng-1.0.6 with the following individuals
46added to the list of Contributing Authors:
47
48    Simon-Pierre Cadieux
49    Eric S. Raymond
50    Mans Rullgard
51    Cosmin Truta
52    Gilles Vollant
53    James Yu
54    Mandar Sahastrabuddhe
55    Google Inc.
56    Vadim Barkov
57
58and with the following additions to the disclaimer:
59
60    There is no warranty against interference with your enjoyment of
61    the library or against infringement.  There is no warranty that our
62    efforts or the library will fulfill any of your particular purposes
63    or needs.  This library is provided with all faults, and the entire
64    risk of satisfactory quality, performance, accuracy, and effort is
65    with the user.
66
67Some files in the "contrib" directory and some configure-generated
68files that are distributed with libpng have other copyright owners, and
69are released under other open source licenses.
70
71libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
72Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
73libpng-0.96, and are distributed according to the same disclaimer and
74license as libpng-0.96, with the following individuals added to the
75list of Contributing Authors:
76
77    Tom Lane
78    Glenn Randers-Pehrson
79    Willem van Schaik
80
81libpng versions 0.89, June 1996, through 0.96, May 1997, are
82Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
83and are distributed according to the same disclaimer and license as
84libpng-0.88, with the following individuals added to the list of
85Contributing Authors:
86
87    John Bowler
88    Kevin Bracey
89    Sam Bushell
90    Magnus Holmgren
91    Greg Roelofs
92    Tom Tanner
93
94Some files in the "scripts" directory have other copyright owners,
95but are released under this license.
96
97libpng versions 0.5, May 1995, through 0.88, January 1996, are
98Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
99
100For the purposes of this copyright and license, "Contributing Authors"
101is defined as the following set of individuals:
102
103    Andreas Dilger
104    Dave Martindale
105    Guy Eric Schalnat
106    Paul Schmidt
107    Tim Wegner
108
109The PNG Reference Library is supplied "AS IS".  The Contributing
110Authors and Group 42, Inc. disclaim all warranties, expressed or
111implied, including, without limitation, the warranties of
112merchantability and of fitness for any purpose.  The Contributing
113Authors and Group 42, Inc. assume no liability for direct, indirect,
114incidental, special, exemplary, or consequential damages, which may
115result from the use of the PNG Reference Library, even if advised of
116the possibility of such damage.
117
118Permission is hereby granted to use, copy, modify, and distribute this
119source code, or portions hereof, for any purpose, without fee, subject
120to the following restrictions:
121
122 1. The origin of this source code must not be misrepresented.
123
124 2. Altered versions must be plainly marked as such and must not
125    be misrepresented as being the original source.
126
127 3. This Copyright notice may not be removed or altered from any
128    source or altered source distribution.
129
130The Contributing Authors and Group 42, Inc. specifically permit,
131without fee, and encourage the use of this source code as a component
132to supporting the PNG file format in commercial products.  If you use
133this source code in a product, acknowledgment is not required but would
134be appreciated.
135