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License Information
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 thepurposes ofthis copyrightand license,"ContributingAuthors" isdefined asthe 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 fordirect, indirect, incidental, special, exemplary,or consequential damages,
which mayresult fromthe useof thePNG ReferenceLibrary, even ifadvised ofthe possibilityof
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 Authorsand 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 usethis source code ina product, acknowledgment is notrequired 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 15, 2011
libxml(MIT License)
Open Source Initiative OSI - The MIT License (MIT):Licensing
The MIT License (MIT)