The current subpixel filtering in Xft is nearly useless, as black text tends to come out as a distracting mixture of red and blue: <http://www.kaseorg.com/~anders/subpixel-before.png> That's because the filter is currently limited to staying within pixel boundaries. I wrote this patch to fix it: <http://www.kaseorg.com/~anders/libXft-improved-filtering.patch> The result: <http://www.kaseorg.com/~anders/subpixel-after.png> This is a *huge* improvement--even without proper gamma correction, I see almost no color fringing at all. It works for RGB, BGR, VRGB, and VBGR. The only side effect I've noticed is that the underlines for access keys in some GTK menus become a tiny bit wider (which is probably GTK's fault, since the menus in Mozilla applications are fine). It currently uses a simple box filter, [1,1,1]/3, because that looked sharper to me than things like [1,3,4,3,1]/12, but the filter is trivial to change, and it can go outside the current pixel by arbitrary amounts. Anders
