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8169280464
Previous implementation set the whole fbo's width and height as the viewpoint. This may increase the numerical error as we may only has a partial region as the valid pixmap. So add a new marco pixmap_priv_get_dest_scale to get proper scale factor for the destination pixmap. For the source/mask pixmap, we still need to consider the whole fbo's size. Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.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
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http://en.wikipedia.org/wiki/X_server
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