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| author | José Expósito <jose.exposito89@gmail.com> | 2022-02-25 17:30:27 +0100 |
|---|---|---|
| committer | José Expósito <jose.exposito89@gmail.com> | 2022-07-11 11:01:35 +0200 |
| commit | c84cc660f0309a4139010be3cea631c464c52c11 (patch) | |
| tree | 7eb24d393a6b885759170bcbc269688d95cbab84 | |
| parent | c8f8ac672caf10a6b2688ed47ddda53cd3af145c (diff) | |
build: check if libinput supports high-res scroll
Starting with Linux Kernel v5.0 two new axes are available for
mice that support high-resolution wheel scrolling: REL_WHEEL_HI_RES and
REL_HWHEEL_HI_RES.
Both axes send data in fractions of 120 where each multiple of 120
amounts to one logical scroll event. Fractions of 120 indicate a wheel
movement less than one detent.
Three new events are now available on libinput:
LIBINPUT_EVENT_POINTER_SCROLL_WHEEL,
LIBINPUT_EVENT_POINTER_SCROLL_FINGER, and
LIBINPUT_EVENT_POINTER_SCROLL_CONTINUOUS.
These events replace the LIBINPUT_EVENT_POINTER_AXIS event, so new
clients should simply ignore that event.
Also, two new APIs are available to access the high-resolution data:
libinput_event_pointer_get_scroll_value() and
libinput_event_pointer_get_scroll_value_v120().
Add a project argument (LIBINPUT_HAS_SCROLL_VALUE120) to allow
building against old versions of libinput or, where high-resolution
scroll is available, support it.
| -rw-r--r-- | backend/libinput/meson.build | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/backend/libinput/meson.build b/backend/libinput/meson.build index 38ba05f1..2f3ccab3 100644 --- a/backend/libinput/meson.build +++ b/backend/libinput/meson.build @@ -28,8 +28,8 @@ wlr_files += files( features += { 'libinput-backend': true } wlr_deps += libinput -# libinput hold gestures are available since 1.19.0 -add_project_arguments( +# libinput hold gestures and high resolution scroll are available since 1.19.0 +add_project_arguments([ '-DLIBINPUT_HAS_HOLD_GESTURES=@0@'.format(libinput.version().version_compare('>=1.19.0').to_int()), - language: 'c', -) + '-DLIBINPUT_HAS_SCROLL_VALUE120=@0@'.format(libinput.version().version_compare('>=1.19.0').to_int()), +], language: 'c') |