| xf.li | 6c8fc1e | 2023-08-12 00:11:09 -0700 | [diff] [blame^] | 1 | .TH PNG 5 "April 14, 2019" |
| 2 | .SH NAME |
| 3 | png \- Portable Network Graphics (PNG) format |
| 4 | |
| 5 | .SH DESCRIPTION |
| 6 | PNG (Portable Network Graphics) is an extensible file format for the |
| 7 | lossless, portable, well-compressed storage of raster images. PNG |
| 8 | provides a patent-free replacement for GIF, and can also replace many |
| 9 | common uses of TIFF. Indexed-color, grayscale, and truecolor images are |
| 10 | supported, plus an optional alpha channel. Sample depths range from |
| 11 | 1 to 16 bits. |
| 12 | .br |
| 13 | PNG is designed to work well in online viewing applications, such |
| 14 | as the World Wide Web, so it is fully streamable with a progressive |
| 15 | display option. PNG is robust, providing both full file integrity |
| 16 | checking and fast, simple detection of common transmission errors. |
| 17 | Also, PNG can store gamma and chromaticity data for improved color |
| 18 | matching on heterogeneous platforms. |
| 19 | |
| 20 | .SH "SEE ALSO" |
| 21 | .BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) |
| 22 | .LP |
| 23 | PNG Specification (Second Edition), November 2003: |
| 24 | .IP |
| 25 | .br |
| 26 | https://www.w3.org/TR/2003/REC-PNG-20031110/ |
| 27 | .LP |
| 28 | PNG 1.2 Specification, July 1999: |
| 29 | .IP |
| 30 | .br |
| 31 | https://png-mng.sourceforge.io/pub/png/spec/1.2/ |
| 32 | .LP |
| 33 | PNG 1.0 Specification, October 1996: |
| 34 | .IP |
| 35 | .br |
| 36 | RFC 2083 |
| 37 | .br |
| 38 | https://www.ietf.org/rfc/rfc2083.txt |
| 39 | .IP |
| 40 | .br |
| 41 | or W3C Recommendation |
| 42 | .br |
| 43 | https://www.w3.org/TR/REC-png-961001 |
| 44 | |
| 45 | .SH AUTHORS |
| 46 | This man page: Cosmin Truta, Glenn Randers-Pehrson |
| 47 | .LP |
| 48 | Portable Network Graphics (PNG) Specification (Second Edition) |
| 49 | Information technology - Computer graphics and image processing - |
| 50 | Portable Network Graphics (PNG): Functional specification. |
| 51 | ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others. |
| 52 | .LP |
| 53 | Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): |
| 54 | Glenn Randers-Pehrson and others (png-list). |
| 55 | .LP |
| 56 | Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): |
| 57 | Thomas Boutell and others (png-list). |
| 58 | |
| 59 | .SH COPYRIGHT |
| 60 | .LP |
| 61 | This man page is |
| 62 | .br |
| 63 | Copyright (c) 2018-2019 Cosmin Truta. |
| 64 | .br |
| 65 | Copyright (c) 1998-2006 Glenn Randers-Pehrson. |
| 66 | .br |
| 67 | See png.h for conditions of use and distribution. |
| 68 | .LP |
| 69 | The PNG Specification (Second Edition) is |
| 70 | .br |
| 71 | Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved. |
| 72 | .LP |
| 73 | The PNG-1.2 Specification is |
| 74 | .br |
| 75 | Copyright (c) 1999 Glenn Randers-Pehrson. |
| 76 | .br |
| 77 | See the specification for conditions of use and distribution. |
| 78 | .LP |
| 79 | The PNG-1.0 Specification is |
| 80 | .br |
| 81 | Copyright (c) 1996 Massachusetts Institute of Technology. |
| 82 | .br |
| 83 | See the specification for conditions of use and distribution. |
| 84 | .\" end of man page |