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9d147305b4
Add support for 'check_flip2' so that the present core can know why it is impossible to flip in that scenario. The core can then let know the client that the buffer format/modifier is suboptimal. v2: No longer need to implement 'check_flip' Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Acked-by: Keith Packard <keithp@keithp.com> Reviewed-by: Adam Jackson <ajax@redhat.com>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
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