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b8ce483f58
Added comments to glamor_pixmap_create. To be refined in the future.
We need to identify whether a pixmap is a CPU memory pixmap or a
GPU pixmap. Current implementation is not correct. There are three
cases:
1. Too large pixmap, we direct it to CPU memory pixmap.
2. w ==0 || h == 0 pixmap, this case has two possibilities:
2.1 It will become a screen pixmap latter, then it should be
GPU type.
2.2 It's a scratch pixmap or created from a share memory, then
it should belong to CPU memory.
XXX, need to be refined latter.
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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