Somewhat shocking how much simpler this is, isn't it? We no longer need
to wrap the screen or GC or Picture, because damage does it for us,
which is doubly great since the old shadowfb code didn't wrap _enough_
things (border updates and Render glyphs, at least). The only real
difference now between this and shadow is a) shadow will let you track
arbitrary pixmaps, and b) shadow's update hook runs off the BlockHandler
whereas shadowfb is immediate.
Tested on nouveau.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
2dcb167262