Glenn Randers-Pehrson | fbbb5ec | 2001-01-15 22:01:20 -0600 | [diff] [blame^] | 1 | .TH PNG 5 "January 16, 2001" |
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 | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 23 | PNG 1.2 specification, July 1999: |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 24 | .IP |
| 25 | .br |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 26 | http://www.libpng.org/pub/png |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 27 | .br |
| 28 | or ftp://ftp.uu.net/graphics/png/documents |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 29 | .LP |
| 30 | PNG 1.0 specification, October 1996: |
| 31 | .IP |
| 32 | .br |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 33 | RFC 2083 |
| 34 | .IP |
| 35 | .br |
| 36 | ftp://ds.internic.net/rfc/rfc2083.txt |
| 37 | .br |
| 38 | or (as a W3C Recommendation) at |
| 39 | .br |
| 40 | http://www.w3.org/TR/REC-png.html |
| 41 | .SH AUTHORS |
| 42 | This man page: Glenn Randers-Pehrson |
| 43 | .LP |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 44 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): |
| 45 | Glenn Randers-Pehrson and others (png-list@ccrc.wustl.edu). |
| 46 | .LP |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 47 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 48 | Thomas Boutell and others (png-list@ccrc.wustl.edu). |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 49 | .LP |
| 50 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 51 | |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 52 | .SH COPYRIGHT NOTICE |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 53 | The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. |
| 54 | See the specification for conditions of use and distribution. |
| 55 | .LP |
| 56 | 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] | 57 | Technology. See the specification for conditions of use and distribution. |
| 58 | .LP |
| 59 | .\" end of man page |
| 60 | |