openimageio : A library for reading and writing images ( https://sites.google.com/site/openimageio/ https://github.com/OpenImageIO )
wxsvg : C++ library to create, manipulate and render SVG files ( http://wxsvg.sourceforge.net/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a ssnb
For Paludis use this rsync : rsync://gentoo.zugaina.org/ssnb-portage
If you have a problem : ycarus(-at-)zugaina.org