YUV or YUYV instead of RGB in GGI

[Paolo Scaffardi]

I am writing a driver for the video controller of my MPC823FADS PowerPC
board.
Its pixel format is not RGB but YUYV.

Then:

1) Can GGI be set to access the framebuffer in YUYV format?
2) If not, how can overlap GGI direct-to-framebuffer primitives with my
new-one based on this format?

Thanx guys!
Bye,
Paolo Scaffardi.