2D antialiasing?

[Clemens Eisserer]

>  From the plain X Server POV, antialiasing is always going to be hard,
> because to do it you need to know the background color or pixmap, and the
> Xserver does not keep track of how you had earlier set it, so it is up to
> individual toolkits to keep track, and not all of them do.
Well, using XRender nobody needs to keep track of anything, its just
composition with a mask (which is generated by the CPU in the case of
trapezoids).

- Clemens