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Peter Hutterer 1dec6f98b0 plugins: add a plugin to emulate high-resolution wheel events 
Fixes a regression causing missing scroll events on devices where the
kernel only sets REL_WHEEL/REL_HWHEEL but not the corresponding
hires events. On those devices we would get the legacy axis events but
no longer the new ones.

The mouse wheel plugin will correctly emulate missing hires events
but it doesn't attach to devices where the hires bit is never set.

This plugin can be very simple - since we know we enabled the code on
this device we don't need to keep any extra state around. If our frame
handler is called for this device we want to add the hi-res events.

Theoretically this breaks if the device has only one hi-res axis enabled
but not the other one (i.e. REL_WHEEL_HI_RES but only REL_HWHEEL) but
that's too theoretical to worry about.

Closes #1156

Fixes: 31854a829a ("plugin: only register the wheel plugin on devices that have a wheel")
Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1268>
2025-07-14 11:14:15 +10:00
.gitlab/issue_templates gitlab: make the bug template the default template 2023-11-23 09:53:09 +10:00
.gitlab-ci CI: drop the separate python-format job 2025-07-09 00:13:00 +00:00
completion/zsh zsh: add shell completion for the eraser button 2025-06-20 10:01:20 +10:00
doc doc/user: update architecture docs with the plugin pipeline 2025-06-27 04:11:40 +00:00
include Remove trailing whitespaces in the tree 2022-11-25 10:08:20 +10:00
quirks plugins: restore the wheel plugin specifically for the MX Master 3 2025-07-10 01:33:24 +00:00
src plugins: add a plugin to emulate high-resolution wheel events 2025-07-14 11:14:15 +10:00
test test: fix a race condition during a switch test 2025-07-10 00:36:23 +00:00
tools tools/libinput-replay: Warn if writing to local-overrides fails 2025-07-09 21:34:54 +00:00
udev Run clang-format over the code 2025-07-01 16:42:44 +10:00
.clang-format Add a clang-format file for consistent code formatting 2025-07-01 16:42:44 +10:00
.clang-format-ignore Add a clang-format file for consistent code formatting 2025-07-01 16:42:44 +10:00
.clang-tidy util: add various helper functions to use __attribute__(cleanup) 2025-04-16 17:04:58 +10:00
.clang-tidy-ignore Add a clang-tidy file 2025-04-07 08:43:36 +00:00
.dir-locals.el indentation: add .dir-locals.el for emacs 2018-02-26 18:44:00 +10:00
.editorconfig editorconfig: add settings for sym files 2024-11-04 10:31:30 +00:00
.git-blame-ignore-revs git: add git-blame-ignore-revs to ignore the clang-format commits 2025-07-02 12:43:13 +10:00
.gitignore gitignore: ignore gnuplot files 2018-05-10 16:25:40 +10:00
.gitlab-ci.yml CI: drop the separate python-format job 2025-07-09 00:13:00 +00:00
.pre-commit-config.yaml pre-commit: bump to latest ruff-format 2025-07-09 00:13:00 +00:00
.triage-policies.yml triage-policies: update to handle a few more things in MRs as well 2025-02-03 09:16:02 +10:00
.vimdir Add .vimdir for libinput-specific settings 2015-05-25 09:17:29 +10:00
CODING_STYLE.md Drop the Signed-off-by requirement 2023-07-21 09:08:46 +10:00
CONTRIBUTING.md CONTRIBUTING: Add CONTRIBUTING.md 2024-02-28 17:07:45 +01:00
COPYING Change various references to the master branch to main 2021-04-29 01:31:03 +00:00
meson.build plugins: add a plugin to emulate high-resolution wheel events 2025-07-14 11:14:15 +10:00
meson_options.txt Move mtdev into a plugin 2025-07-02 06:53:05 +00:00
README.md Change various references to the master branch to main 2021-04-29 01:31:03 +00:00

README.md

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 to minimize the amount of custom input code the user of libinput needs 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.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

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.

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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