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gerrit-public.fairphone.software / platform / external / libpng / refs/heads/int/13/fp4 / . / png.5
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Cosmin Trutaa40189c2019-04-14 14:10:32 -0400[diff] [blame]1.TH PNG 5 "April 14, 2019"
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]2.SH NAME
3png \- Portable Network Graphics (PNG) format
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]4
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]5.SH DESCRIPTION
6PNG (Portable Network Graphics) is an extensible file format for the
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]7lossless, portable, well-compressed storage of raster images. PNG
8provides a patent-free replacement for GIF, and can also replace many
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]9common uses of TIFF. Indexed-color, grayscale, and truecolor images are
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]10supported, plus an optional alpha channel. Sample depths range from
Glenn Randers-Pehrson5c6aeb21998-12-29 11:47:59 -0600[diff] [blame]111 to 16 bits.
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]12.br
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]13PNG is designed to work well in online viewing applications, such
14as the World Wide Web, so it is fully streamable with a progressive
15display option. PNG is robust, providing both full file integrity
16checking and fast, simple detection of common transmission errors.
17Also, PNG can store gamma and chromaticity data for improved color
18matching on heterogeneous platforms.
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
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]23PNG Specification (Second Edition), November 2003:
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]24.IP
25.br
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]26https://www.w3.org/TR/2003/REC-PNG-20031110/
27.LP
28PNG 1.2 Specification, July 1999:
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]29.IP
30.br
Viktor Szakatsb3ffdc52017-03-31 23:25:57 +0000[diff] [blame]31https://png-mng.sourceforge.io/pub/png/spec/1.2/
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]32.LP
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]33PNG 1.0 Specification, October 1996:
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]34.IP
35.br
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]36RFC 2083
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]37.br
Viktor Szakatsb3ffdc52017-03-31 23:25:57 +0000[diff] [blame]38https://www.ietf.org/rfc/rfc2083.txt
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]39.IP
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]40.br
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]41or W3C Recommendation
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]42.br
Viktor Szakatsb3ffdc52017-03-31 23:25:57 +0000[diff] [blame]43https://www.w3.org/TR/REC-png-961001
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]44
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]45.SH AUTHORS
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]46This man page: Cosmin Truta, Glenn Randers-Pehrson
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]47.LP
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]48Portable Network Graphics (PNG) Specification (Second Edition)
49Information technology - Computer graphics and image processing -
50Portable Network Graphics (PNG): Functional specification.
51ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
52.LP
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]53Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
Glenn Randers-Pehrson250dfe12004-09-11 21:19:54 -0500[diff] [blame]54Glenn Randers-Pehrson and others (png-list).
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]55.LP
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]56Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
Glenn Randers-Pehrson250dfe12004-09-11 21:19:54 -0500[diff] [blame]57Thomas Boutell and others (png-list).
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]58
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]59.SH COPYRIGHT
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]60.LP
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]61This man page is
62.br
Cosmin Trutaa40189c2019-04-14 14:10:32 -0400[diff] [blame]63Copyright (c) 2018-2019 Cosmin Truta.
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]64.br
65Copyright (c) 1998-2006 Glenn Randers-Pehrson.
66.br
67See png.h for conditions of use and distribution.
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]68.LP
69The PNG Specification (Second Edition) is
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]70.br
Glenn Randers-Pehrsona4981d42004-08-25 22:00:45 -0500[diff] [blame]71Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
72.LP
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]73The PNG-1.2 Specification is
74.br
75Copyright (c) 1999 Glenn Randers-Pehrson.
76.br
Glenn Randers-Pehrson4393a9a1999-09-17 12:27:26 -0500[diff] [blame]77See the specification for conditions of use and distribution.
78.LP
Cosmin Truta84403262018-07-29 00:33:12 -0400[diff] [blame]79The PNG-1.0 Specification is
80.br
81Copyright (c) 1996 Massachusetts Institute of Technology.
82.br
83See the specification for conditions of use and distribution.
Glenn Randers-Pehrson0f881d61998-02-07 10:20:57 -0600[diff] [blame]84.\" end of man page