xwayland: Fix rendering

Since we get the ClientMessage after the surface is created, there's
no good way to synchronize the two streams. In this case, what we
need to do is delay the surface commit until after we get the
ClientMessage. Ideally, we'd be using a better surface system overall
where committing the surface didn't depend on what type it is, but
oh well, this is a good short-term hack for now.

src/wayland/meta-wayland-surface-private.h

@@ -0,0 +1,32 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2014 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Written by:
+ *     Jasper St. Pierre <jstpierre@mecheye.net>
+ */
+
+#ifndef META_WAYLAND_SURFACE_PRIVATE_H
+#define META_WAYLAND_SURFACE_PRIVATE_H
+
+#include "meta-wayland-types.h"
+
+void meta_wayland_surface_commit (MetaWaylandSurface *surface);
+
+#endif /* META_WAYLAND_SURFACE_PRIVATE_H */

src/wayland/meta-wayland-surface.c

@@ -48,6 +48,7 @@
 #include "meta-wayland-keyboard.h"
 #include "meta-wayland-pointer.h"
 #include "meta-wayland-data-device.h"
+#include "meta-wayland-surface-private.h"
 
 #include "meta-cursor-tracker-private.h"
 #include "display-private.h"
@@ -365,6 +366,14 @@ commit_double_buffered_state (MetaWaylandSurface             *surface,
     toplevel_surface_commit (surface, pending);
   else if (surface->subsurface.resource)
     subsurface_surface_commit (surface, pending);
+  else
+    {
+      /* Unknown surface type. In this case, it's most likely a XWayland
+       * surface that we haven't gotten the ClientMessage for yet. Make
+       * sure *not* to reset the double-buffered state or do anything too
+       * fancy. */
+      return;
+    }
 
   g_list_foreach (surface->subsurfaces,
                   parent_surface_committed,
@@ -383,7 +392,7 @@ commit_double_buffered_state (MetaWaylandSurface             *surface,
   double_buffered_state_reset (pending);
 }
 
-static void
+void
 meta_wayland_surface_commit (MetaWaylandSurface *surface)
 {
   commit_double_buffered_state (surface, &surface->pending);

src/wayland/meta-xwayland.c

@@ -26,6 +26,8 @@
 #include "meta-xwayland.h"
 #include "meta-xwayland-private.h"
 
+#include "meta-wayland-surface-private.h"
+
 #include <glib.h>
 #include <glib-unix.h>
 #include <unistd.h>
@@ -54,6 +56,12 @@ associate_window_with_surface (MetaWindow         *window,
   window->surface = surface;
 
   meta_compositor_window_surface_changed (display->compositor, window);
+
+  /* Since the association comes in the form of a ClientMessage,
+   * we have no way to know when the surface was set up. Since
+   * commit just breaks if we don't have a window associated with
+   * it, we need to do a commit *again* here. */
+  meta_wayland_surface_commit (surface);
 }
 
 static gboolean