1 '\" te |
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2 .TH png\&.4 4 "26 Mar 2004" "SunOS 5.11" "File Formats" |
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3 .SH "NAME" |
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4 png \- Portable Network |
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5 Graphics (PNG) format |
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6 .SH "DESCRIPTION" |
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7 .PP |
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8 PNG (Portable Network Graphics) is an extensible file format for the |
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9 lossless, portable, well-compressed storage of raster images\&. PNG provides |
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10 a patent-free replacement for GIF and can also replace many common uses of |
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11 TIFF\&. Indexed-color, grayscale, and truecolor images are supported, and an |
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12 optional alpha channel\&. Sample depths range from 1 to 16 bits\&. |
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13 .PP |
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14 PNG is designed to work well in online viewing applications, such as |
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15 the World Wide Web, and is fully streamable with a progressive display option\&. |
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16 PNG is robust, and provides both full file integrity checking, and fast simple |
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17 detection of common transmission errors\&. PNG can store gamma and chromaticity |
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18 data for improved color matching on heterogeneous platforms\&. |
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19 .SH "SEE ALSO" |
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20 .PP |
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21 \fBlibpng\fR(3), \fBzlib\fR(3) |
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22 .PP |
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23 PNG 1\&.2 specification, July 1999: \fBhttp://www\&.libpng\&.org/pub/png\fR |
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24 or \fBftp://ftp\&.uu\&.net/graphics/png/documents\fR |
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25 .PP |
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26 PNG 1\&.0 specification, October 1996: RFC 2083 |
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27 \fBftp://ds\&.internic\&.net/rfc/rfc2083\&.txt\fR |
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28 or as a W3C Recommendation at |
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29 \fBhttp://www\&.w3\&.org/TR/REC-png\&.html\fR |
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30 .SH "NOTES" |
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31 .PP |
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32 This man page was originally written by Glenn Randers-Pehrson\&. Updated by Breda McColgan, Sun Microsystems Inc\&., 2004\&. |
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