Add support for libmng (MNG images)
Name Category Description
advancecomp app-arch Recompress ZIP, PNG and MNG, considerably improving compression
devil media-libs DevIL image library
flinker dev-games GBA cart writing utility by Jeff Frohwein
freeimage media-libs Image library supporting many formats
freeimage media-libs Image library supporting many formats
gimageview media-gfx Powerful GTK+ based image & movie viewer
gimp media-gfx GNU Image Manipulation Program
magicpoint app-office An X11 based presentation tool
mplayer media-video Media Player for Linux
netsurf www-client a free, open source web browser
pari-data sci-mathematics Data sets for pari
qtgui dev-qt The GUI module and platform plugins for the Qt5 framework
qtimageformats dev-qt Additional format plugins for the Qt image I/O system
stratagus games-engines A realtime strategy game engine
xine-lib media-libs Core libraries for Xine movie player

Thank you!