[Xorg-driver-geode] Glyph rendering

[Huang, FrankR]

Jonathan,

	Our driver is in low performance in glyph rendering.
	Based on the debug and discussion with Michel, There are three
operation:
	1)Op:PictOpAdd, Src:PICT_a8r8g8b8 Mask:0 Dest:PICT_a8
	2)Op:PictOpAdd, Src:PICT_a8 Mask:0 Dest:PICT_a8r8g8b8
	3)Op:PictOpOver, Src:PICT_a8r8g8b8 Mask:PICT_a8r8g8b8
Dst:PICT_r5g6b5
	Right now, the geode driver fallback all. If we want to
accelerate, How do handle these conditions?


Thanks,
Frank