PNG(5) BSD Reference Manual PNG(5)
png - Portable Network Graphics format
The png library contains functions dealing with files in the PNG format.
PNG (Portable Network Graphics) is an extensible file format for the
lossless, portable, well-compressed storage of raster images. PNG pro-
vides a patent-free replacement for GIF and can also replace many common
uses of TIFF. Indexed-colour, grayscale, and truecolour images are sup-
ported, plus an optional alpha channel. Sample depths range from 1 to 16
bits.
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 op-
tion. PNG is robust, providing both full file integrity checking and
fast, simple detection of common transmission errors. Also, PNG can
storegamma and chromaticity data for improved colour matching on hetero-
geneous platforms.
/usr/include/png.h, /usr/lib/libpng.a
libpng(3), compress(3).
The PNG specification, second edition, November 2003
http://www.w3.org/TR/2003/REC-PNG-20031110/
The PNG 1.2 specification, July 1999
http://www.libpng.org/pub/png
The PNG 1.0 specification, October 1996
RFC 2083, ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt
A W3C draft is at http://www.w3.org/TR/REC-png.html
The png library became part of the base system with MirOS #8.
The current libpng maintainer is Glenn Randers-Pehrson
<glennrp@users.sourceforge.net>.
This manual page and the MirOS adaptions are courtesy of
Thorsten "mirabilos" Glaser <tg@mirbsd.de>.
For detailed authorship and copyright information, refer to
/usr/include/png.h.
MirOS BSD #10-current October 22, 2008 1
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These manual pages and other documentation are copyrighted by their respective writers;
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This product includes material
provided by Thorsten Glaser.
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