Libpng

libpng

Developer(s)	Guy Eric Schalnat, Andreas Dilger, Glenn Randers-Pehrson, et al.
Stable release	1.6.46[1]  / 23 January 2025; 14 days ago (23 January 2025)
Repository	sf.net/p/libpng/code/
Written in	C
Operating system	Cross-platform
Type	Image library
License	libpng License
Website	libpng.org/pub/png/libpng.html

libpng is the official Portable Network Graphics (PNG) reference library (originally called pnglib). It is a platform-independent library that contains C 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.[2] libpng is dependent on zlib for data compression and decompression routines.

libpng is released under the libpng license, a permissive free software licence, and is free software. It is frequently used in both free and proprietary software, either directly or through the use of a higher level image library.

As of 2017^[update] 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.[3] All vulnerability warnings and crash bugs are published on the main page.[2]

References

1. "LIBPNG: PNG reference library - Browse /libpng16/1.6.46 at SourceForge.net". Retrieved 25 January 2025.
2. Greg Roelofs (2025). "libpng". libpng.org.
3. "PNG Reference Library: libpng". libpng.org. 2017-09-29.

External links

• libpng on GitHub
• Libpng at Open Hub
• A howto on writing PNG images using libpng