XCB: follow pointer motion in the parent window

This ensures events are delivered when the mouse moves outside the
rendering area but within the embedding drawable. This is necessary to
autonatically unhide the cursor. As a side effect, we need to adjust
the pointer coordinates.

modules/video_output/xcb/common.c

@@ -126,7 +126,8 @@ vout_window_t *GetWindow (vout_display_t *vd,
         free (geo);
 
         /* Subscribe to parent window resize events */
-        uint32_t value = XCB_EVENT_MASK_STRUCTURE_NOTIFY;
+        uint32_t value = XCB_EVENT_MASK_POINTER_MOTION
+                       | XCB_EVENT_MASK_STRUCTURE_NOTIFY;
         xcb_change_window_attributes (conn, wnd->handle.xid,
                                       XCB_CW_EVENT_MASK, &value);
         /* Try to subscribe to click events */

modules/video_output/xcb/events.c

@@ -64,9 +64,9 @@ static void HandleMotionNotify (vout_display_t *vd,
         return;
 
     const int x = vd->source.i_x_offset +
-        (int64_t)(ev->event_x -0*place.x) * vd->source.i_visible_width / place.width;
+        (int64_t)(ev->event_x - place.x) * vd->source.i_visible_width / place.width;
     const int y = vd->source.i_y_offset +
-        (int64_t)(ev->event_y -0*place.y) * vd->source.i_visible_height/ place.height;
+        (int64_t)(ev->event_y - place.y) * vd->source.i_visible_height/ place.height;
 
     /* TODO show the cursor ? */
     if (x >= vd->source.i_x_offset && x < vd->source.i_x_offset + vd->source.i_visible_width &&
@@ -153,6 +153,3 @@ int ManageEvent (vout_display_t *vd, xcb_connection_t *conn, bool *visible)
 
     return VLC_SUCCESS;
 }
-
-
-

modules/video_output/xcb/x11.c

@@ -257,7 +257,7 @@ static int Open (vlc_object_t *obj)
         const uint32_t values[] = {
             /* XCB_CW_EVENT_MASK */
             XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
-            XCB_EVENT_MASK_POINTER_MOTION | XCB_EVENT_MASK_VISIBILITY_CHANGE,
+            XCB_EVENT_MASK_VISIBILITY_CHANGE,
             /* XCB_CW_COLORMAP */
             cmap,
         };

modules/video_output/xcb/xvideo.c

@@ -447,7 +447,7 @@ static int Open (vlc_object_t *obj)
         const uint32_t mask =
             /* XCB_CW_EVENT_MASK */
             XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
-            XCB_EVENT_MASK_POINTER_MOTION | XCB_EVENT_MASK_VISIBILITY_CHANGE;
+            XCB_EVENT_MASK_VISIBILITY_CHANGE;
         xcb_void_cookie_t c;
         xcb_window_t window = xcb_generate_id (conn);