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6e26493272
We currently rely on an extra millisecond being added by the filter code to get a velocity that are small enough to not hit the max acceleration limit. If this arbitrary millisecond is changed (for example by changing the internal time measurment to microseconds and adding just a microsecond instead), the velocity may change so that the maximum or minimum acceleration is always hit. Adding a delay to the test won't work either since it would not only rely on ending up within the acceleration limits but there would also be an non-deterministic actual delay causing the velocity of the movement after the direction change to be potentially larger than the movement in the original direction due to the actual time delta in libinput will not always be 1ms. To fix the test to not rely on any artificial delays in the filter code nor any non-deterministic delays in the test, lets just test that the direction change of the hardware events resulted in a direction change of the libinput motion events. Signed-off-by: Jonas Ådahl <jadahl@gmail.com> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> |
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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/ 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. 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 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. */