png - Portable Network Graphics (PNG) format
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, and 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, and is fully streamable with a progressive display option. PNG is robust, and provides both full file integrity checking, and fast simple detection of common transmission errors. PNG can store gamma and chromaticity data for improved color matching on heterogeneous platforms.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE ATTRIBUTE VALUE Availability SUNWpng Interface stability Volatile
PNG 1.2 specification, July 1999: http://www.libpng.org/pub/png or ftp://ftp.uu.net/graphics/png/documents
PNG 1.0 specification, October 1996: RFC 2083 ftp://ds.internic.net/rfc/rfc2083.txt or as a W3C Recommendation at http://www.w3.org/TR/REC-png.html
This man page was originally written by Glenn Randers-Pehrson. Updated by Breda McColgan, Sun Microsystems Inc., 2004.
|SunOS 5.11||png.4 (4)||26 Mar 2004|