bafbd99080
In WarpPointer calls, we get input in screen coordinates. They must be scaled to device coordinates, and then back to screen coordinates for screen crossing and root coordinates in events. The rounding errors introduced (and clipping in core/XI 1.x events) can lead to the actual position being different to the requested input coordinates. e.g. 200 scales to 199.9999, truncated to 199 in the event. Avoid this by simply overwriting the scaled screen coordinates with the input coordinates for the POINTER_SCREEN case. X.Org Bug 53037 <http://bugs.freedesktop.org/show_bug.cgi?id=53037> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Keith Packard <keithp@keithp.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.
For a comprehensive overview of X Server and X Window System, consult the
following article:
http://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
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http://cgit.freedesktop.org/xorg/xserver
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