.TH PNG 5 "February 7, 1998"
.SH NAME
libpng \- Portable Network Graphics (PNG) format
.SH SYNOPSIS
[see
.I png.h
for full description]
.SH DESCRIPTION
The
.I libpng
library supports encoding, decoding, and various manipulations of
the Portable Network Graphics (PNG) format image files.  It uses the
.IR zlib(3)
compression library.
.SH "SEE ALSO"
.IR libpng :
.IP
ftp://ftp.uu.net/graphics/png
http://www.cdrom.com/pub/png
.LP
.IR zlib :
.IP
(generally) at the same location as
.I libpng
or at
.br
ftp://ftp.uu.net/pub/archiving/zip/zlib
.br
http://www.cdrom.com/pub/infozip/zlib
.LP
PNG specification:
RFC 2083
.IP
(generally) at the same location as
.I libpng
or at
.br
ftp://ds.internic.net/rfc/rfc2083.txt
.br
or (as a W3C Recommendation) at
.br
http://www.w3.org/TR/REC-png.html
.SH AUTHORS
This man page: R. P. C. Rodgers and Glenn Randers-Pehrson
.LP
Libpng version 0.99c (February 7, 1998):
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (randeg@alumni.rpi.edu).
.LP
Supported by the PNG development group
.br
(png-implement@dworkin.wustl.edu).
.LP

.SH COPYRIGHT NOTICE
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
.br
Copyright (c) 1996, 1997 Andreas Dilger
.br
Copyright (c) 1998 Glenn Randers-Pehrson
.br

.LP
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 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.
.LP
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:
.br

1. The origin of this source code must not be misrepresented.
.br

2. Altered versions must be plainly marked as such and must not be
misrepresented as being the original source.
.br

3. This Copyright notice may not be removed or altered from any source or
altered source distribution.
.br

.LP
The Contributing Authors and 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 use this
source code in a product, acknowledgment is not required but would be
appreciated.

.LP
The
.IR zlib (3)
library, version 1.0.8,
is copyright (C) 1995-1998 by Jean-loup Gailly and Mark Adler.
.LP
.\" end of man page