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ea70ebe0ac
There are two cases which we may use a wrong texture size. 1. A pixmap is modified by the client side after it created it. Then the pixmap's width may mismatch the original fbo/tex's size. Thus we need to check this condition when preparing upload the pixmap. 2. We provide two API to download/upload sub region of a textured pixmap. The caller may pass in a larger width then the original pixmap's size, this may happen at putimage and setspans. We need to validate the width and height when do the downloading/uploading. 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
following article:
http://en.wikipedia.org/wiki/X_server
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