projects / wxWidgets.git / blame
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1 | .TH PNG 5 "March 15, 1998" |
| 2 | .SH NAME | |
| 3 | png \- Portable Network Graphics (PNG) format | |
| 4 | .SH DESCRIPTION | |
| 5 | PNG (Portable Network Graphics) is an extensible file format for the | |
| 6 | lossless, portable, well-compressed storage of raster images. PNG provides | |
| 7 | a patent-free replacement for GIF and can also replace many | |
| 8 | common uses of TIFF. Indexed-color, grayscale, and truecolor images are | |
| 9 | supported, plus an optional alpha channel. Sample depths range from | |
| 10 | 1 to 16 bits. | |
| 11 | .br | |
| 12 | ||
| 13 | PNG is designed to work well in online viewing applications, such as the | |
| 14 | World Wide Web, so it is fully streamable with a progressive display | |
| 15 | option. PNG is robust, providing both full file integrity checking and | |
| 16 | fast, simple detection of common transmission errors. Also, PNG can store | |
| 17 | gamma and chromaticity data for improved color matching on heterogeneous | |
| 18 | platforms. | |
| 19 | ||
| 20 | .SH "SEE ALSO" | |
| 21 | .IR libpng(3), zlib(3), deflate(5), and zlib(5) | |
| 22 | .LP | |
| 23 | PNG specification: | |
| 24 | RFC 2083 | |
| 25 | .IP | |
| 26 | .br | |
| 27 | ftp://ds.internic.net/rfc/rfc2083.txt | |
| 28 | .br | |
| 29 | or (as a W3C Recommendation) at | |
| 30 | .br | |
| 31 | http://www.w3.org/TR/REC-png.html | |
| 32 | .SH AUTHORS | |
| 33 | This man page: Glenn Randers-Pehrson | |
| 34 | .LP | |
| 35 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): | |
| 36 | Thomas Boutell and others (png-list@dworkin.wustl.edu). | |
| 37 | .LP | |
| 38 | ||
| 39 | .SH COPYRIGHT NOTICE | |
| 40 | The PNG specification is copyright (c) 1996 Massachussets Institute of | |
| 41 | Technology. See the specification for conditions of use and distribution. | |
| 42 | .LP | |
| 43 | .\" end of man page | |
| 44 |