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ff31427e80
The previous code had three main issues: * acceleration kicked in too early, so even slow movements were accelerated * acceleration kicked in too quickly, there was only a very narrow window where we would have less than the max acceleration factor * the max accel factor was too low for fast movements, so they still fell short of expectations This patch revamps most of the acceleration though it keeps the basic shape of the acceleration curve. * The threshold is increased significantly so that faster movement still map to the finger movement. Acceleration doesn't kick in until we get to something that's really fast like a flick. * The incline is dropped, so acceleration kicks in slower than before, i.e. the difference between the first speed that is accelerated and the speed that reaches the maximum is higher than before. * The maximum acceleration is increased so ever faster movements get ever faster. The max is effectively out of reach now, if you move fast enough to hit this speed, your cursor will end up on the moon anyway. A couple of other changes apply now too, specifically: * The incline remains the same regardless of the speed * The max accel factor remains the same regardless of the speed The caculated factor changes with the speed set so that the base speed changes with the desired speed. 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. */