LibretroAdmin cec7ea5aae udev: fix touchscreen pointer press, release and slot handling ...

The touchscreen pointer is pressed while any contact is down and
released when the last one lifts, and the pointer device answers X, Y
and pressed. A multi-touch panel is read by its MT slots only: the
kernel's single-touch emulation (ABS_X/ABS_Y/BTN_TOUCH) repeats the
oldest contact and is ignored there. A single-touch panel keeps its
contact in slot 0, the slot index starts at the kernel's unannounced
slot 0, a slot resync recounts the held contacts, and panel positions
are taken from the axis minimum.

Regression lane: samples/input/udev_touch drives the real driver with
an in-memory multi-touch and single-touch panel.

Closes #20060

2026-11-11 23:23:27 +01:00

..

Makefile

udev: fix touchscreen pointer press, release and slot handling

2026-11-11 23:23:27 +01:00

udev_touch_test.c

udev: fix touchscreen pointer press, release and slot handling

2026-11-11 23:23:27 +01:00