Antialiasing filter question

[Psychophanta]

Does someone know how to activate antialias filter by hardware?

There are 2 useful algorithms made by software:
1. 2xSaI Advanced Scale and Interpolation engine
(C) Derek Liauw Kie Fa aka Kreed (http://elektron.its.tudelft.nl/~dalikifa/)
2. hq2x Magnification Filter
(C) Maxim Stepin (http://www.hiend3d.com/hq2x.html)

But there are a hardware implementation in newest VGAs to perform an antialiasing filter rendering.
And i don't know if there are other hardware filters like scanlines, etc.

So if someone here have some trail...

[KarLKoX]

A simple shader example :

http://www.shadertech.com/shaders/Checker.fx

But this one is by far better (and the site and the author kickass the world !) :

http://www.humus.ca/index.php?page=3D&ID=59

I ve just remember about the scale2x shader from Pete Bernert