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If a touch ends and starts again in the same frame, our touch count gets out of whack. This later triggers an assertion when the tap touch count mismatches the real tap count. E: 0.105005 0003 0039 -001 # EV_ABS / ABS_MT_TRACKING_ID -1 E: 0.105005 0003 0035 8447 # EV_ABS / ABS_MT_POSITION_X 8447 E: 0.105005 0003 0036 4479 # EV_ABS / ABS_MT_POSITION_Y 4479 E: 0.105005 0001 014a 0000 # EV_KEY / BTN_TOUCH 0 E: 0.105005 0001 0145 0000 # EV_KEY / BTN_TOOL_FINGER 0 E: 0.105005 0003 0039 0074 # EV_ABS / ABS_MT_TRACKING_ID 74 E: 0.105005 0003 0035 8388 # EV_ABS / ABS_MT_POSITION_X 8388 E: 0.105005 0003 0036 4480 # EV_ABS / ABS_MT_POSITION_Y 4480 E: 0.105005 0001 014a 0001 # EV_KEY / BTN_TOUCH 1 E: 0.105005 0001 0145 0001 # EV_KEY / BTN_TOOL_FINGER 1 E: 0.105005 0003 0000 8388 # EV_ABS / ABS_X 8388 E: 0.105005 0003 0001 4480 # EV_ABS / ABS_Y 4480 E: 0.105005 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +19ms This is a kernel bug but let's paper over here because otherwise we crash and that's considered impolite. Fixes #161 Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> |
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libinput
libinput is a library that provides a full input stack for display servers and other applications that need to handle input devices provided by the kernel.
libinput provides device detection, event handling 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 relative pointer events from touchpads, pointer acceleration, etc.
User documentation
Documentation explaining features available in libinput is available here.
This includes the FAQ and the instructions on reporting bugs.
Source code
The source code of libinput can be found at: https://gitlab.freedesktop.org/libinput/libinput
For a list of current and past releases visit: https://www.freedesktop.org/wiki/Software/libinput/
Build instructions: https://wayland.freedesktop.org/libinput/doc/latest/building_libinput.html
Reporting Bugs
Bugs can be filed on freedesktop.org GitLab: https://gitlab.freedesktop.org/libinput/libinput/issues/
Where possible, please provide the libinput record output
of the input device and/or the event sequence in question.
See https://wayland.freedesktop.org/libinput/doc/latest/reporting-bugs.html for more info.
Documentation
- Developer API documentation: https://wayland.freedesktop.org/libinput/doc/latest/modules.html
- High-level documentation about libinput's features: https://wayland.freedesktop.org/libinput/doc/latest/pages.html
- Build instructions: https://wayland.freedesktop.org/libinput/doc/latest/building_libinput.html
- Documentation for previous versions of libinput: https://wayland.freedesktop.org/libinput/doc/
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://gitlab.freedesktop.org/libinput/libinput/tree/master/tools/libinput-debug-events.c
- A GTK application that draws cursor/touch/tablet positions: https://gitlab.freedesktop.org/libinput/libinput/tree/master/tools/libinput-debug-gui.c
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 file for the full license information.
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