libpng (JollaPhone)

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.

sha256sum filename:
194501fca86b03bc3cfa38544a5ae0aa9526801b3beea4fa9057c51de05564f4 libpng-1.6.37-3.armv7hl.rpm
be573d3f0bd44da6a0333696ccdfcf7573531bedd144377511d026d6fb904093 libpng-devel-1.6.37-3.armv7hl.rpm