1## libpng v1.6.40
2
3### libpng License
4<pre>
5
6COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
7=========================================
8
9PNG Reference Library License version 2
10---------------------------------------
11
12Copyright (c) 1995-2023 The PNG Reference Library Authors.
13Copyright (c) 2018-2023 Cosmin Truta
14Copyright (c) 1998-2018 Glenn Randers-Pehrson
15Copyright (c) 1996-1997 Andreas Dilger
16Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
17
18The software is supplied "as is", without warranty of any kind,
19express or implied, including, without limitation, the warranties
20of merchantability, fitness for a particular purpose, title, and
21non-infringement.  In no event shall the Copyright owners, or
22anyone distributing the software, be liable for any damages or
23other liability, whether in contract, tort or otherwise, arising
24from, out of, or in connection with the software, or the use or
25other dealings in the software, even if advised of the possibility
26of such damage.
27
28Permission is hereby granted to use, copy, modify, and distribute
29this software, or portions hereof, for any purpose, without fee,
30subject to the following restrictions:
31
32 1. The origin of this software must not be misrepresented; you
33    must not claim that you wrote the original software.  If you
34    use this software in a product, an acknowledgment in the product
35    documentation would be appreciated, but is not required.
36
37 2. Altered source versions must be plainly marked as such, and must
38    not be misrepresented as being the original software.
39
40 3. This Copyright notice may not be removed or altered from any
41    source or altered source distribution.
42
43
44PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35)
45-----------------------------------------------------------------------
46
47libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018 are
48Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are
49derived from libpng-1.0.6, and are distributed according to the same
50disclaimer and license as libpng-1.0.6 with the following individuals
51added to the list of Contributing Authors:
52
53    Simon-Pierre Cadieux
54    Eric S. Raymond
55    Mans Rullgard
56    Cosmin Truta
57    Gilles Vollant
58    James Yu
59    Mandar Sahastrabuddhe
60    Google Inc.
61    Vadim Barkov
62
63and with the following additions to the disclaimer:
64
65    There is no warranty against interference with your enjoyment of
66    the library or against infringement.  There is no warranty that our
67    efforts or the library will fulfill any of your particular purposes
68    or needs.  This library is provided with all faults, and the entire
69    risk of satisfactory quality, performance, accuracy, and effort is
70    with the user.
71
72Some files in the "contrib" directory and some configure-generated
73files that are distributed with libpng have other copyright owners, and
74are released under other open source licenses.
75
76libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
77Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
78libpng-0.96, and are distributed according to the same disclaimer and
79license as libpng-0.96, with the following individuals added to the
80list of Contributing Authors:
81
82    Tom Lane
83    Glenn Randers-Pehrson
84    Willem van Schaik
85
86libpng versions 0.89, June 1996, through 0.96, May 1997, are
87Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
88and are distributed according to the same disclaimer and license as
89libpng-0.88, with the following individuals added to the list of
90Contributing Authors:
91
92    John Bowler
93    Kevin Bracey
94    Sam Bushell
95    Magnus Holmgren
96    Greg Roelofs
97    Tom Tanner
98
99Some files in the "scripts" directory have other copyright owners,
100but are released under this license.
101
102libpng versions 0.5, May 1995, through 0.88, January 1996, are
103Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
104
105For the purposes of this copyright and license, "Contributing Authors"
106is defined as the following set of individuals:
107
108    Andreas Dilger
109    Dave Martindale
110    Guy Eric Schalnat
111    Paul Schmidt
112    Tim Wegner
113
114The PNG Reference Library is supplied "AS IS".  The Contributing
115Authors and Group 42, Inc. disclaim all warranties, expressed or
116implied, including, without limitation, the warranties of
117merchantability and of fitness for any purpose.  The Contributing
118Authors and Group 42, Inc. assume no liability for direct, indirect,
119incidental, special, exemplary, or consequential damages, which may
120result from the use of the PNG Reference Library, even if advised of
121the possibility of such damage.
122
123Permission is hereby granted to use, copy, modify, and distribute this
124source code, or portions hereof, for any purpose, without fee, subject
125to the following restrictions:
126
127 1. The origin of this source code must not be misrepresented.
128
129 2. Altered versions must be plainly marked as such and must not
130    be misrepresented as being the original source.
131
132 3. This Copyright notice may not be removed or altered from any
133    source or altered source distribution.
134
135The Contributing Authors and Group 42, Inc. specifically permit,
136without fee, and encourage the use of this source code as a component
137to supporting the PNG file format in commercial products.  If you use
138this source code in a product, acknowledgment is not required but would
139be appreciated.
140
141TRADEMARK
142=========
143
144The name "libpng" has not been registered by the Copyright owners
145as a trademark in any jurisdiction.  However, because libpng has
146been distributed and maintained world-wide, continually since 1995,
147the Copyright owners claim "common-law trademark protection" in any
148jurisdiction where common-law trademark is recognized.
149
150</pre>
151
152### AUTHORS File Information
153```
154PNG REFERENCE LIBRARY AUTHORS
155=============================
156
157This is the list of PNG Reference Library ("libpng") Contributing
158Authors, for copyright and licensing purposes.
159
160 * Andreas Dilger
161 * Cosmin Truta
162 * Dave Martindale
163 * Eric S. Raymond
164 * Gilles Vollant
165 * Glenn Randers-Pehrson
166 * Greg Roelofs
167 * Guy Eric Schalnat
168 * James Yu
169 * John Bowler
170 * Kevin Bracey
171 * Magnus Holmgren
172 * Mandar Sahastrabuddhe
173 * Mans Rullgard
174 * Matt Sarett
175 * Mike Klein
176 * Pascal Massimino
177 * Paul Schmidt
178 * Philippe Antoine
179 * Qiang Zhou
180 * Sam Bushell
181 * Samuel Williams
182 * Simon-Pierre Cadieux
183 * Tim Wegner
184 * Tom Lane
185 * Tom Tanner
186 * Vadim Barkov
187 * Willem van Schaik
188 * Zhijie Liang
189 * Arm Holdings
190   - Richard Townsend
191 * Google Inc.
192   - Dan Field
193   - Leon Scroggins III
194   - Matt Sarett
195   - Mike Klein
196   - Sami Boukortt
197   - Wan-Teh Chang
198
199The build projects, the build scripts, the test scripts, and other
200files in the "ci", "projects", "scripts" and "tests" directories, have
201other copyright owners, but are released under the libpng license.
202
203Some files in the "contrib" directory, and some tools-generated files
204that are distributed with libpng, have other copyright owners, and are
205released under other open source licenses.
206```
207