3a02f56b43
For details on the protocol itself see the Wayland merge request: https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/72 The v120 event has a value base of 120, so one wheel detent is 120, half a wheel is 60, etc. This is the API Windows has been using since Vista but it requires HW support from the device. Logitech mice and many Microsoft mice of the last decade or so have support and it's enabled in the kernel since v5.0. The new events replace wl_pointer.axis_discrete events, once you bind to wl_pointer >= 8 you only get the v120 events. So backwards compatibility is simple, we just multiply the discrete events if we get them and treat everything as 120 event internally. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.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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