| Glenn Randers-Pehrson | f8b008c | 1999-09-18 10:54:36 -0500 | [diff] [blame^] | 1 | .TH PNG 5 "September 18, 1999" |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 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 |
| Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 10 | 1 to 16 bits. |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 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 |
| Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 18 | platforms. |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 19 | |
| 20 | .SH "SEE ALSO" |
| 21 | .IR libpng(3), zlib(3), deflate(5), and zlib(5) |
| 22 | .LP |
| Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 23 | PNG 1.1 specification, January 1999: |
| 24 | .IP |
| 25 | .br |
| 26 | http://www.cdrom.com/pub/png |
| 27 | .LP |
| 28 | PNG 1.0 specification, October 1996: |
| 29 | .IP |
| 30 | .br |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 31 | RFC 2083 |
| 32 | .IP |
| 33 | .br |
| 34 | ftp://ds.internic.net/rfc/rfc2083.txt |
| 35 | .br |
| 36 | or (as a W3C Recommendation) at |
| 37 | .br |
| 38 | http://www.w3.org/TR/REC-png.html |
| 39 | .SH AUTHORS |
| 40 | This man page: Glenn Randers-Pehrson |
| 41 | .LP |
| Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 42 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): |
| 43 | Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu). |
| 44 | .LP |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 45 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): |
| Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 46 | Thomas Boutell and others (png-list@ccrc.wustl.edu). |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 47 | .LP |
| 48 | |
| Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 49 | |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 50 | .SH COPYRIGHT NOTICE |
| Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 51 | The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. |
| 52 | See the specification for conditions of use and distribution. |
| 53 | .LP |
| 54 | The PNG-1.0 specification is copyright (c) 1996 Massachussets Institute of |
| Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 55 | Technology. See the specification for conditions of use and distribution. |
| 56 | .LP |
| 57 | .\" end of man page |
| 58 | |