[OLPC-Games] SDL improvements...

[Chih-Chung Chang]

Hi,

I think it may be a good idea to add an RGB overlay backend for SDL
(probably as an option in the X11 backend). The hardware has a scaler
so the games can render using smaller resolution but still have
full-screen display. Otherwise the 1200x900 resolution could be a
bottleneck for high-fps games.

Currently there seems to be some bug in the driver
(http://dev.laptop.org/ticket/1336), but I think it can be fixed.

Regards,
Chih-Chung Chang