These ebuilds come from http://gitorious.org/lcd-filtering.
If you have some problems, go to the official site first.
cairo : A vector graphics library with cross-device output support ( http://cairographics.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a lcd-filtering
For Paludis use this rsync : rsync://gentoo.zugaina.org/lcd-filtering-portage
If you have a problem : ycarus(-at-)zugaina.org