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| 1 .TH PNG 5 "May 14, 2016" |
| 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 .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 <http://www.w3.org/TR/2003/REC-PNG-20031110/ |
| 27 PNG 1.2 specification, July 1999: |
| 28 .IP |
| 29 .br |
| 30 http://png-mng.sourceforge.net/pub/png/spec/1.2/ |
| 31 .LP |
| 32 PNG 1.0 specification, October 1996: |
| 33 .IP |
| 34 .br |
| 35 RFC 2083 |
| 36 .IP |
| 37 .br |
| 38 ftp://ds.internic.net/rfc/rfc2083.txt |
| 39 .br |
| 40 or (as a W3C Recommendation) at |
| 41 .br |
| 42 http://www.w3.org/TR/REC-png-961001 |
| 43 .SH AUTHORS |
| 44 This man page: Glenn Randers-Pehrson |
| 45 .LP |
| 46 Portable Network Graphics (PNG) Specification (Second Edition) |
| 47 Information technology - Computer graphics and image processing - |
| 48 Portable Network Graphics (PNG): Functional specification. |
| 49 ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others. |
| 50 .LP |
| 51 Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): |
| 52 Glenn Randers-Pehrson and others (png-list). |
| 53 .LP |
| 54 Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): |
| 55 Thomas Boutell and others (png-list). |
| 56 .LP |
| 57 |
| 58 |
| 59 .SH COPYRIGHT NOTICE |
| 60 .LP |
| 61 This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h |
| 62 for conditions of use and distribution. |
| 63 .LP |
| 64 The PNG Specification (Second Edition) is |
| 65 Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved. |
| 66 .LP |
| 67 The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson. |
| 68 See the specification for conditions of use and distribution. |
| 69 .LP |
| 70 The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of |
| 71 Technology. See the specification for conditions of use and distribution. |
| 72 .LP |
| 73 .\" end of man page |
| 74 |
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Chromium Code Reviews
Issue 2033063003:
Check libpng directly into third_party/ (Closed)
Base URL: https://skia.googlesource.com/skia.git@master