User's Manual

247
Open Source Software Notice
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 󳝌tness 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. speci󳝌cally permit, without fee, and encourage
the use of this source code as a component to supporting the PNG 󳝌le format in commercial
products. If you use this source code in a product, acknowledgment is not required 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 󳝌les "pngbar.png" and "pngbar.
jpg (88x31) and "pngnow.png" (98x31).
Libpng is OSI Certi󳝌ed Open Source Software. OSI Certi󳝌ed Open Source is a certi󳝌cation mark
of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
December 9, 2010
MIT