Hi all,

Gdkdrawable-directfb drawing function's gdk_directfb_update_region is removed 
since gtk+-2.12.x.

I know this feature has some advantages on performance and buffering outside of 
expose.

But in the viewpoint of unique interface between X11 and Directfb, it would 
give some confusion to application developers.

Although we have same interfaces, gdk_window_begin_paint_xxx and 
gdk_window_end_paint, to reflect on screen, we don't still have gdk_flush in 
Directfb. And this makes different drawing model from X11.

Implementing gdk_flush and supporting same behavior in Directfb is right policy?
I'm really wondering that there is any plan to make this in opensource side.
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