blob: 6cc8805aa41dea41efe8ff4bf8dd0bae5aae683b [file] [log] [blame]
Glenn Randers-Pehrson71a3c1f2008-11-26 12:00:38 -06001.TH PNG 5 "November 26, 2008"
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -06002.SH NAME
3png \- Portable Network Graphics (PNG) format
4.SH DESCRIPTION
5PNG (Portable Network Graphics) is an extensible file format for the
6lossless, portable, well-compressed storage of raster images. PNG provides
7a patent-free replacement for GIF and can also replace many
8common uses of TIFF. Indexed-color, grayscale, and truecolor images are
9supported, plus an optional alpha channel. Sample depths range from
Glenn Randers-Pehrson5c6aeb21998-12-29 11:47:59 -0600101 to 16 bits.
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -060011.br
12
13PNG is designed to work well in online viewing applications, such as the
14World Wide Web, so it is fully streamable with a progressive display
15option. PNG is robust, providing both full file integrity checking and
16fast, simple detection of common transmission errors. Also, PNG can store
17gamma and chromaticity data for improved color matching on heterogeneous
Glenn Randers-Pehrson5c6aeb21998-12-29 11:47:59 -060018platforms.
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -060019
20.SH "SEE ALSO"
21.IR libpng(3), zlib(3), deflate(5), and zlib(5)
22.LP
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -050023PNG specification (second edition), November 2003:
24.IP
25.br
26 <http://www.w3.org/TR/2003/REC-PNG-20031110/
Glenn Randers-Pehrson61c32d92000-02-04 23:40:16 -060027PNG 1.2 specification, July 1999:
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -050028.IP
29.br
Glenn Randers-Pehrson5e5c1e12000-11-10 12:26:19 -060030http://www.libpng.org/pub/png
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -050031.LP
32PNG 1.0 specification, October 1996:
33.IP
34.br
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -060035RFC 2083
36.IP
37.br
38ftp://ds.internic.net/rfc/rfc2083.txt
39.br
40or (as a W3C Recommendation) at
41.br
42http://www.w3.org/TR/REC-png.html
43.SH AUTHORS
44This man page: Glenn Randers-Pehrson
45.LP
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -050046Portable Network Graphics (PNG) Specification (Second Edition)
47Information technology - Computer graphics and image processing -
48Portable Network Graphics (PNG): Functional specification.
49ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
50.LP
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -050051Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
Glenn Randers-Pehrson250dfe12004-09-11 21:19:54 -050052Glenn Randers-Pehrson and others (png-list).
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -050053.LP
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -060054Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
Glenn Randers-Pehrson250dfe12004-09-11 21:19:54 -050055Thomas Boutell and others (png-list).
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -060056.LP
57
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -050058
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -060059.SH COPYRIGHT NOTICE
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -050060.LP
Glenn Randers-Pehrson7b34df32006-02-24 06:30:16 -060061This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -050062for conditions of use and distribution.
63.LP
64The PNG Specification (Second Edition) is
65Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
66.LP
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -050067The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
68See the specification for conditions of use and distribution.
69.LP
Glenn Randers-Pehrson07748d12002-05-25 11:12:10 -050070The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -060071Technology. See the specification for conditions of use and distribution.
72.LP
73.\" end of man page
74