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4c4b5de641
That's something human brains can map to because mapping a touchpad to equivalent units of a 1000dpi mouse requires a lot of mental acrobatics. And I'm getting older and my physio told me acrobatics is more something for the youngens, possibly those on my lawn listening to terrible music, etc. The various numbers are converted either times 25.4/1000 or times 1000/25.4, depending on the usage. Somewhere I made a mistake or a rounding error or something, so the acceleration curve is not exactly the same, but it's close enough that it shouldn't matter. The difference shows up in a gnuplot of the curve but it may not even perceivable anyway. And these values will be overhauled soon anyway, so meh. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Hans de Goede <hdegoede@redhat.com> |
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/*!@mainpage libinput ======== libinput is a library that handles input devices for display servers and other applications that need to directly deal with input devices. It provides device detection, device handling, input device event processing and abstraction so minimize the amount of custom input code the user of libinput need to provide the common set of functionality that users expect. Input event processing includes scaling touch coordinates, generating pointer events from touchpads, pointer acceleration, etc. libinput originates from [weston](http://cgit.freedesktop.org/wayland/weston/), the Wayland reference compositor. Architecture ------------ libinput is not used directly by applications, rather it is used by the xf86-input-libinput X.Org driver or wayland compositors. The typical software stack for a system running Wayland is: @dotfile libinput-stack-wayland.gv Where the Wayland compositor may be Weston, mutter, KWin, etc. Note that Wayland encourages the use of toolkits, so the Wayland client (your application) does not usually talk directly to the compositor but rather employs a toolkit (e.g. GTK) to do so. The simplified software stack for a system running X.Org is: @dotfile libinput-stack-xorg.gv Again, on a modern system the application does not usually talk directly to the X server using Xlib but rather employs a toolkit to do so. Source code ----------- The source code of libinput can be found at: http://cgit.freedesktop.org/wayland/libinput For a list of current and past releases visit: http://www.freedesktop.org/wiki/Software/libinput/ Build instructions: http://wayland.freedesktop.org/libinput/doc/latest/building_libinput.html Reporting Bugs -------------- Bugs can be filed in the libinput component of Wayland: https://bugs.freedesktop.org/enter_bug.cgi?product=Wayland&component=libinput Where possible, please provide an [evemu](http://www.freedesktop.org/wiki/Evemu/) recording of the input device and/or the event sequence in question. See @ref reporting_bugs for more info. Documentation ------------- Developer API documentation: http://wayland.freedesktop.org/libinput/doc/latest/modules.html High-level documentation about libinput's features: http://wayland.freedesktop.org/libinput/doc/latest/pages.html Examples of how to use libinput are the debugging tools in the libinput repository. Developers are encouraged to look at those tools for a real-world (yet simple) example on how to use libinput. - A commandline debugging tool: https://cgit.freedesktop.org/wayland/libinput/tree/tools/event-debug.c - A GTK application that draws cursor/touch/tablet positions: https://cgit.freedesktop.org/wayland/libinput/tree/tools/event-gui.c Build instructions: http://wayland.freedesktop.org/libinput/doc/latest/building_libinput.html License ------- libinput is licensed under the MIT license. > Permission is hereby granted, free of charge, to any person obtaining a > copy of this software and associated documentation files (the "Software"), > to deal in the Software without restriction, including without limitation > the rights to use, copy, modify, merge, publish, distribute, sublicense, > and/or sell copies of the Software, and to permit persons to whom the > Software is furnished to do so, subject to the following conditions: [...] See the [COPYING](http://cgit.freedesktop.org/wayland/libinput/tree/COPYING) file for the full license information. */