2XPM -- Yet Another Filter
But this one is the filter to rule them all.
HQ2X is one of the better filters out there, but it has one serious limitation: it doesn't handle "jaggies" very well when there's a lot of colours in the picture. Basically, it works great in EGA games but not so great in VGA games.
This is where Pablo Medina's 2XPM comes to the front. Overall, it looks very much like HQ2X, except that it can smooth out manually-antialiased curves without blurring the whole picture and no higher CPU overhead than HQ2X. Look out the screnshoots at the this website for comparison (particularly the "Fido Slido" text).
Ticket imported from: #1315759. Ticket imported from: feature-requests/263.