[mutter/gnome-3-36] backends/native: Translate coordinates of absolute motion events

[Carlos Garnacho <carlosg src gnome org>]

commit 83553e3f6ea06f0076d9d0b7bdf2a193ef2a0d43
Author: Jonas Troeger <jonas troeger-mail de>
Date:   Tue Mar 31 22:11:37 2020 +0200

    backends/native: Translate coordinates of absolute motion events
    
    The motion events of tablets for example need to be mapped on the
    selected screen area if the input device is configured to use only a
    part of the active logical monitor.
    To achieve this behavior each motion event is transformed using the
    transformation matrix set for the input device.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1118

 src/backends/native/meta-seat-native.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/backends/native/meta-seat-native.c b/src/backends/native/meta-seat-native.c
index 7e0feab44..9c25d4abf 100644
--- a/src/backends/native/meta-seat-native.c
+++ b/src/backends/native/meta-seat-native.c
@@ -424,6 +424,9 @@ new_absolute_motion_event (MetaSeatNative     *seat,
   meta_xkb_translate_state (event, seat->xkb, seat->button_state);
   event->motion.x = x;
   event->motion.y = y;
+  meta_input_device_native_translate_coordinates (input_device, stage,
+                                                  &event->motion.x,
+                                                  &event->motion.y);
   event->motion.axes = axes;
   clutter_event_set_device (event, seat->core_pointer);
   clutter_event_set_source_device (event, input_device);