present: Only send PresentCompleteNotify events to the presenting client

We were sending the events to all clients listening for them on the
window. But clients can get confused by events from another client, and
I can't imagine any case where receiving events from other clients would
be required.

v2:
* Also restrict events sent to additional windows to the presenting
  client
* Don't shorten line lengths

Reviewed-by: Keith Packard <keithp@keithp.com>

present/present.c

@@ -206,13 +206,13 @@ present_vblank_notify(present_vblank_ptr vblank, CARD8 kind, CARD8 mode, uint64_
     int         n;
 
     if (vblank->window)
-        present_send_complete_notify(vblank->window, kind, mode, vblank->serial, ust, crtc_msc - vblank->msc_offset);
+        present_send_complete_notify(vblank->window, kind, mode, vblank->serial, ust, crtc_msc - vblank->msc_offset, vblank->client);
     for (n = 0; n < vblank->num_notifies; n++) {
         WindowPtr   window = vblank->notifies[n].window;
         CARD32      serial = vblank->notifies[n].serial;
 
         if (window)
-            present_send_complete_notify(window, kind, mode, serial, ust, crtc_msc - vblank->msc_offset);
+            present_send_complete_notify(window, kind, mode, serial, ust, crtc_msc - vblank->msc_offset, vblank->client);
     }
 }
 
@@ -772,6 +772,7 @@ present_execute(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc)
 int
 present_pixmap(WindowPtr window,
                PixmapPtr pixmap,
+               ClientPtr client,
                CARD32 serial,
                RegionPtr valid,
                RegionPtr update,
@@ -882,6 +883,7 @@ present_pixmap(WindowPtr window,
     xorg_list_append(&vblank->window_list, &window_priv->vblank);
     xorg_list_init(&vblank->event_queue);
 
+    vblank->client = client;
     vblank->screen = screen;
     vblank->window = window;
     vblank->pixmap = pixmap;
@@ -1001,6 +1003,7 @@ present_abort_vblank(ScreenPtr screen, RRCrtcPtr crtc, uint64_t event_id, uint64
 
 int
 present_notify_msc(WindowPtr window,
+                   ClientPtr client,
                    CARD32 serial,
                    uint64_t target_msc,
                    uint64_t divisor,
@@ -1008,6 +1011,7 @@ present_notify_msc(WindowPtr window,
 {
     return present_pixmap(window,
                           NULL,
+                          client,
                           serial,
                           NULL, NULL,
                           0, 0,

present/present_event.c

@@ -146,7 +146,7 @@ present_register_complete_notify(present_complete_notify_proc proc)
 }
 
 void
-present_send_complete_notify(WindowPtr window, CARD8 kind, CARD8 mode, CARD32 serial, uint64_t ust, uint64_t msc)
+present_send_complete_notify(WindowPtr window, CARD8 kind, CARD8 mode, CARD32 serial, uint64_t ust, uint64_t msc, ClientPtr client)
 {
     present_window_priv_ptr window_priv = present_window_priv(window);
 
@@ -167,7 +167,8 @@ present_send_complete_notify(WindowPtr window, CARD8 kind, CARD8 mode, CARD32 se
         present_event_ptr event;
 
         for (event = window_priv->events; event; event = event->next) {
-            if (event->mask & PresentCompleteNotifyMask) {
+            if (event->mask & PresentCompleteNotifyMask &&
+                client == event->client) {
                 cn.eid = event->id;
                 WriteEventsToClient(event->client, 1, (xEvent *) &cn);
             }

present/present_priv.h

@@ -52,6 +52,7 @@ struct present_notify {
 struct present_vblank {
     struct xorg_list    window_list;
     struct xorg_list    event_queue;
+    ClientPtr           client;
     ScreenPtr           screen;
     WindowPtr           window;
     PixmapPtr           pixmap;
@@ -155,6 +156,7 @@ present_get_window_priv(WindowPtr window, Bool create);
 int
 present_pixmap(WindowPtr window,
                PixmapPtr pixmap,
+               ClientPtr client,
                CARD32 serial,
                RegionPtr valid,
                RegionPtr update,
@@ -172,6 +174,7 @@ present_pixmap(WindowPtr window,
 
 int
 present_notify_msc(WindowPtr window,
+                   ClientPtr client,
                    CARD32 serial,
                    uint64_t target_msc,
                    uint64_t divisor,
@@ -215,7 +218,7 @@ void
 present_send_config_notify(WindowPtr window, int x, int y, int w, int h, int bw, WindowPtr sibling);
 
 void
-present_send_complete_notify(WindowPtr window, CARD8 kind, CARD8 mode, CARD32 serial, uint64_t ust, uint64_t msc);
+present_send_complete_notify(WindowPtr window, CARD8 kind, CARD8 mode, CARD32 serial, uint64_t ust, uint64_t msc, ClientPtr client);
 
 void
 present_send_idle_notify(WindowPtr window, CARD32 serial, PixmapPtr pixmap, present_fence_ptr idle_fence);

present/present_request.c

@@ -135,7 +135,7 @@ proc_present_pixmap(ClientPtr client)
             return ret;
     }
 
-    ret = present_pixmap(window, pixmap, stuff->serial, valid, update,
+    ret = present_pixmap(window, pixmap, client, stuff->serial, valid, update,
                          stuff->x_off, stuff->y_off, target_crtc,
                          wait_fence, idle_fence, stuff->options,
                          stuff->target_msc, stuff->divisor, stuff->remainder, notifies, nnotifies);
@@ -171,7 +171,7 @@ proc_present_notify_msc(ClientPtr client)
         }
     }
 
-    return present_notify_msc(window, stuff->serial,
+    return present_notify_msc(window, client, stuff->serial,
                               stuff->target_msc, stuff->divisor, stuff->remainder);
 }