Package libpng

A library of functions for manipulating PNG image format files

http://www.libpng.org/pub/png/

The libpng package contains a library of functions for creating and
manipulating PNG (Portable Network Graphics) image format files. PNG
is a bit-mapped graphics format similar to the GIF format. PNG was
created to replace the GIF format, since GIF uses a patented data
compression algorithm.

Libpng should be installed if you need to manipulate PNG format image
files.

File Formats
File Description
png Portable Network Graphics (PNG) format