7e9d167c9c
This cleans up some of the mess this code was in. Functions we need to wrap can now have a standard implementation using WRAP_FUNCTION - that macro declares the __real and __wrap functions and a wrapped_$func global variable. Tests can set that variable to their desired functions and it will be then be called on demand.
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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https://lists.freedesktop.org/mailman/listinfo/xorg
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https://gitlab.freedesktop.org/xorg/xserver
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