X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2Fevdev-mt-touchpad.c;h=d831b836bab0c85ae6022a2278451ad35e965e2c;hb=3e93d913bef339311976a927091674fb7f1f4987;hp=67828bda7e0d069aed43f9da62809e69a266b151;hpb=125e98a1f8909cafbb968ea0c2bd9b21349490bb;p=platform%2Fupstream%2Flibinput.git

diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 67828bd..d831b83 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -406,6 +406,11 @@ tp_process_state(struct tp_dispatch *tp, uint64_t time)
 
 	for (i = 0; i < tp->ntouches; i++) {
 		t = tp_get_touch(tp, i);
+
+		/* semi-mt finger postions may "jump" when nfingers changes */
+		if (tp->semi_mt && tp->nfingers_down != tp->old_nfingers_down)
+			tp_motion_history_reset(t);
+
 		if (i >= tp->real_touches && t->state != TOUCH_NONE) {
 			t->x = first->x;
 			t->y = first->y;
@@ -454,6 +459,7 @@ tp_post_process_state(struct tp_dispatch *tp, uint64_t time)
 		t->dirty = false;
 	}
 
+	tp->old_nfingers_down = tp->nfingers_down;
 	tp->buttons.old_state = tp->buttons.state;
 
 	tp->queued = TOUCHPAD_EVENT_NONE;
@@ -668,6 +674,8 @@ tp_init_slots(struct tp_dispatch *tp,
 		tp->has_mt = false;
 	}
 
+	tp->semi_mt = libevdev_has_property(device->evdev, INPUT_PROP_SEMI_MT);
+
 	ARRAY_FOR_EACH(max_touches, m) {
 		if (libevdev_has_event_code(device->evdev,
 					    EV_KEY,
@@ -816,6 +824,8 @@ tp_init(struct tp_dispatch *tp,
 	if (tp_init_palmdetect(tp, device) != 0)
 		return -1;
 
+	device->seat_caps |= EVDEV_DEVICE_POINTER;
+
 	return 0;
 }