0a315e45dd
Make it type-safe and a bit more obvious what it really does, also adding some inline documentation. Since it's just some bit shifting magic, it's qualified for inlining. The CLIENT_ID() macro isn't used by any external modules, so the new function doesn't need to be in a public header. 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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