Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / libpng / 25d240dc6ea3f259eb29b169cba9d879a6d2ab9c / . / png.5
blob: 834b401ee5c5722822a1803e272a537343db67a1 [file] [log] [blame]
Glenn Randers-Pehrson25d240d2014-10-07 18:46:53 -0500[diff] [blame^]1.TH PNG 5 "October 7, 2014"
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]2.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 -0600[diff] [blame]101 to 16 bits.
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]11.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 -0600[diff] [blame]18platforms.
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]19
20.SH "SEE ALSO"
Glenn Randers-Pehrson4e763f12010-03-03 10:45:50 -0600[diff] [blame]21.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]22.LP
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]23PNG 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 -0600[diff] [blame]27PNG 1.2 specification, July 1999:
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]28.IP
29.br
Glenn Randers-Pehrson5e5c1e12000-11-10 12:26:19 -0600[diff] [blame]30http://www.libpng.org/pub/png
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]31.LP
32PNG 1.0 specification, October 1996:
33.IP
34.br
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]35RFC 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 -0500[diff] [blame]46Portable 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 -0500[diff] [blame]51Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
Glenn Randers-Pehrson250dfe12004-09-11 21:19:54 -0500[diff] [blame]52Glenn Randers-Pehrson and others (png-list).
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]53.LP
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]54Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
Glenn Randers-Pehrson250dfe12004-09-11 21:19:54 -0500[diff] [blame]55Thomas Boutell and others (png-list).
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]56.LP
57
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]58
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]59.SH COPYRIGHT NOTICE
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]60.LP
Glenn Randers-Pehrson7b34df32006-02-24 06:30:16 -0600[diff] [blame]61This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]62for 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 -0500[diff] [blame]67The 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 -0500[diff] [blame]70The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]71Technology. See the specification for conditions of use and distribution.
72.LP
73.\" end of man page
74