View source for Libpng

{{Lowercase|title=libpng}}
{{Infobox software
| name                   = libpng
| developer              = [[Guy Eric Schalnat]],<br/>[[Andreas Dilger]],<br/>[[Glenn Randers-Pehrson]], et al.
| latest release version = {{wikidata|property|preferred|references|edit|P348|P548=Q2804309}}                                             | latest release date    = {{Start date and age|{{wikidata|qualifier|preferred|single|P348|P548=Q2804309|P577}}|df=yes}}
| programming language   = [[C (programming language)|C]]
| operating system       = [[Cross-platform]]
| genre                  = [[Library (computing)|Image library]]
| license                = [[libpng License]]
}}
'''libpng''' is the official [[Portable Network Graphics]] (PNG) [[reference implementation|reference]] [[Library (computer science)|library]] (originally called '''pnglib'''). It is a platform-independent library that contains [[C (programming language)|C]] [[Function (computer science)|functions]] for handling PNG images. It supports almost all of PNG's features, is extensible, and has been widely used and tested for over 28 years.<ref name="libpng" /> libpng is dependent on [[zlib]] for data compression and decompression routines.

libpng is released under the [[Libpng License|libpng license]], a [[permissive free software licence]], and is [[free software]]. It is frequently used in both [[Free software|free]] and [[Proprietary software|proprietary]] software, either directly or through the use of a [[High- and low-level|higher level]] image library.

{{As of|2017}} the latest versions in the 1.6.x and 1.5.x branches were considered as release versions, while 1.4.x, 1.2.x, and 1.0.x were considered as legacy versions getting only security fixes.<ref>{{cite web |url=https://libpng.sourceforge.io/index.html |title=PNG Reference Library: libpng |date=2017-09-29 |publisher=libpng.org}}</ref> All vulnerability warnings and crash bugs are published on the main page.<ref name="libpng">{{cite web |url=http://www.libpng.org/pub/png/libpng.html |title=libpng |author=Greg Roelofs |publisher=libpng.org |date={{CURRENTYEAR}}}}</ref>

==References==
{{Reflist}}

==External links==
{{Portal|Free Software}}
* {{github|pnggroup/libpng}}
* {{openhub|libpng}}
* A [http://www.labbookpages.co.uk/software/imgProc/libPNG.html howto] on writing PNG images using libpng

[[Category:C (programming language) libraries]]
[[Category:Free software programmed in C]]
[[Category:Graphics libraries]]

{{Graphics-software-stub}}