2000-05-16 11:17:36 +00:00
|
|
|
.TH PNG 5 "May 16, 2000"
|
1998-02-07 16:20:57 +00:00
|
|
|
.SH NAME
|
|
|
|
|
png \- Portable Network Graphics (PNG) format
|
|
|
|
|
.SH DESCRIPTION
|
|
|
|
|
PNG (Portable Network Graphics) is an extensible file format for the
|
|
|
|
|
lossless, portable, well-compressed storage of raster images. PNG provides
|
|
|
|
|
a patent-free replacement for GIF and can also replace many
|
|
|
|
|
common uses of TIFF. Indexed-color, grayscale, and truecolor images are
|
|
|
|
|
supported, plus an optional alpha channel. Sample depths range from
|
1998-12-29 17:47:59 +00:00
|
|
|
1 to 16 bits.
|
1998-02-07 16:20:57 +00:00
|
|
|
.br
|
|
|
|
|
|
|
|
|
|
PNG is designed to work well in online viewing applications, such as the
|
|
|
|
|
World Wide Web, so it is fully streamable with a progressive display
|
|
|
|
|
option. PNG is robust, providing both full file integrity checking and
|
|
|
|
|
fast, simple detection of common transmission errors. Also, PNG can store
|
|
|
|
|
gamma and chromaticity data for improved color matching on heterogeneous
|
1998-12-29 17:47:59 +00:00
|
|
|
platforms.
|
1998-02-07 16:20:57 +00:00
|
|
|
|
|
|
|
|
.SH "SEE ALSO"
|
|
|
|
|
.IR libpng(3), zlib(3), deflate(5), and zlib(5)
|
|
|
|
|
.LP
|
2000-02-05 05:40:16 +00:00
|
|
|
PNG 1.2 specification, July 1999:
|
1999-09-17 17:27:26 +00:00
|
|
|
.IP
|
|
|
|
|
.br
|
2000-03-21 11:13:06 +00:00
|
|
|
http://www.cdrom.com/pub/png (moving to http://www.libpng.org)
|
|
|
|
|
.br
|
|
|
|
|
or ftp://ftp.uu.net/graphics/png/documents
|
1999-09-17 17:27:26 +00:00
|
|
|
.LP
|
|
|
|
|
PNG 1.0 specification, October 1996:
|
|
|
|
|
.IP
|
|
|
|
|
.br
|
1998-02-07 16:20:57 +00:00
|
|
|
RFC 2083
|
|
|
|
|
.IP
|
|
|
|
|
.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: Glenn Randers-Pehrson
|
|
|
|
|
.LP
|
1999-09-17 17:27:26 +00:00
|
|
|
Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
|
|
|
|
|
Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu).
|
|
|
|
|
.LP
|
1998-02-07 16:20:57 +00:00
|
|
|
Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
|
1999-09-17 17:27:26 +00:00
|
|
|
Thomas Boutell and others (png-list@ccrc.wustl.edu).
|
1998-02-07 16:20:57 +00:00
|
|
|
.LP
|
|
|
|
|
|
1999-09-17 17:27:26 +00:00
|
|
|
|
1998-02-07 16:20:57 +00:00
|
|
|
.SH COPYRIGHT NOTICE
|
1999-09-17 17:27:26 +00:00
|
|
|
The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
|
|
|
|
|
See the specification for conditions of use and distribution.
|
|
|
|
|
.LP
|
|
|
|
|
The PNG-1.0 specification is copyright (c) 1996 Massachussets Institute of
|
1998-02-07 16:20:57 +00:00
|
|
|
Technology. See the specification for conditions of use and distribution.
|
|
|
|
|
.LP
|
|
|
|
|
.\" end of man page
|
|
|
|
|
|
