master f4db260e94 2/2: Minor improvements to frame synchronization

[Po Lu]

branch: master
commit f4db260e94e399ed9fb5c2872c02810626262be9
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Minor improvements to frame synchronization
    
    * src/xterm.c (x_sync_wait_for_frame_drawn_event): Update
    compositor bypass property if frame synchronization is being
    disabled.
---
 src/xterm.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/xterm.c b/src/xterm.c
index 278a8dda10..44b53b229a 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -6991,6 +6991,7 @@ static void
 x_sync_wait_for_frame_drawn_event (struct frame *f)
 {
   XEvent event;
+  struct x_display_info *dpyinfo;
 
   if (!FRAME_X_WAITING_FOR_DRAW (f)
       /* The compositing manager can't draw a frame if it is
@@ -6998,6 +6999,8 @@ x_sync_wait_for_frame_drawn_event (struct frame *f)
       || !FRAME_VISIBLE_P (f))
     return;
 
+  dpyinfo = FRAME_DISPLAY_INFO (f);
+
   /* Wait for the frame drawn message to arrive.  */
   if (x_if_event (FRAME_X_DISPLAY (f), &event,
                  x_sync_is_frame_drawn_event, (XPointer) f,
@@ -7013,6 +7016,11 @@ x_sync_wait_for_frame_drawn_event (struct frame *f)
                   "been disabled\n");
          FRAME_X_OUTPUT (f)->use_vsync_p = false;
 
+         /* Remove the compositor bypass property from the outer
+            window.  */
+         XDeleteProperty (dpyinfo->display, FRAME_OUTER_WINDOW (f),
+                          dpyinfo->Xatom_net_wm_bypass_compositor);
+
          /* Also change the frame parameter to reflect the new
             state.  */
          store_frame_param (f, Quse_frame_synchronization, Qnil);
@@ -7026,7 +7034,7 @@ x_sync_wait_for_frame_drawn_event (struct frame *f)
        }
     }
   else
-    x_sync_note_frame_times (FRAME_DISPLAY_INFO (f), f, &event);
+    x_sync_note_frame_times (dpyinfo, f, &event);
 
   FRAME_X_WAITING_FOR_DRAW (f) = false;
 }