libinput: Expose unaccelerated motion deltas in motion event struct

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>

libweston/compositor.h

@@ -243,6 +243,7 @@ struct weston_output {
 enum weston_pointer_motion_mask {
 	WESTON_POINTER_MOTION_ABS = 1 << 0,
 	WESTON_POINTER_MOTION_REL = 1 << 1,
+	WESTON_POINTER_MOTION_REL_UNACCEL = 1 << 2,
 };
 
 struct weston_pointer_motion_event {
@@ -251,6 +252,8 @@ struct weston_pointer_motion_event {
 	double y;
 	double dx;
 	double dy;
+	double dx_unaccel;
+	double dy_unaccel;
 };
 
 struct weston_pointer_axis_event {

libweston/libinput-device.c

@@ -86,11 +86,18 @@ handle_pointer_motion(struct libinput_device *libinput_device,
 	struct evdev_device *device =
 		libinput_device_get_user_data(libinput_device);
 	struct weston_pointer_motion_event event = { 0 };
+	double dx_unaccel, dy_unaccel;
+
+	dx_unaccel = libinput_event_pointer_get_dx_unaccelerated(pointer_event);
+	dy_unaccel = libinput_event_pointer_get_dy_unaccelerated(pointer_event);
 
 	event = (struct weston_pointer_motion_event) {
-		.mask = WESTON_POINTER_MOTION_REL,
+		.mask = WESTON_POINTER_MOTION_REL |
+			WESTON_POINTER_MOTION_REL_UNACCEL,
 		.dx = libinput_event_pointer_get_dx(pointer_event),
 		.dy = libinput_event_pointer_get_dy(pointer_event),
+		.dx_unaccel = dx_unaccel,
+		.dy_unaccel = dy_unaccel,
 	};
 
 	notify_motion(device->seat,