2736619d73
Upcoming patches will need to retieve GC's XIDs on the upstream connection. Moving this out into separate .c file, in order to not creating more dependencies on Xlib headers, which we wanna get rid of. For now, looking at the Xlib GC structure, attached to our DDX GCs. When all users of the Xlib GC have gone (ie. moved all consumers to xcb), we'll create the GC via xcb directly, thus replacing the Xlib GC struct by XID - the interface of this helper will remain the same. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
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: https://en.wikipedia.org/wiki/X_server
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