[mutter] main: Clean up the initialization sequence

[Jasper St. Pierre <jstpierre src gnome org>]

commit a7b1b1da80cfd2b8b01ff751fa218f525ac0d5e5
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Aug 18 16:54:15 2014 -0400

    main: Clean up the initialization sequence
    
    The initialization sequence before was quite icky, initializing Clutter
    in a few different places depending on what was going on.
    
    Put that all back into main.c

 src/core/main.c            |   26 +++++++++++++-------------
 src/wayland/meta-wayland.c |   32 +++++++++++++++++++++-----------
 src/wayland/meta-wayland.h |    1 +
 3 files changed, 35 insertions(+), 24 deletions(-)
---
diff --git a/src/core/main.c b/src/core/main.c
index 1e60b44..1397217 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -348,15 +348,22 @@ meta_init (void)
 
 #ifdef HAVE_WAYLAND
   if (meta_is_wayland_compositor ())
-    {
-      /* NB: When running as a hybrid wayland compositor we run our own headless X
-       * server so the user can't control the X display to connect too. */
-      meta_wayland_init ();
-    }
-  else
+    meta_wayland_pre_clutter_init ();
 #endif
+
+  /* NB: When running as a hybrid wayland compositor we run our own headless X
+   * server so the user can't control the X display to connect too. */
+  if (!meta_is_wayland_compositor ())
     meta_select_display (opt_display_name);
 
+  meta_clutter_init ();
+
+#ifdef HAVE_WAYLAND
+  /* Bring up Wayland. This also launches Xwayland and sets DISPLAY as well... */
+  if (meta_is_wayland_compositor ())
+    meta_wayland_init ();
+#endif
+
   meta_set_syncing (opt_sync || (g_getenv ("MUTTER_SYNC") != NULL));
 
   if (opt_replace_wm)
@@ -367,13 +374,6 @@ meta_init (void)
 
   meta_main_loop = g_main_loop_new (NULL, FALSE);
 
-  /* If we are running with wayland then we don't wait until we have
-   * an X connection before initializing clutter we instead initialize
-   * it earlier since we need to initialize the GL driver so the driver
-   * can register any needed wayland extensions. */
-  if (!meta_is_wayland_compositor ())
-    meta_clutter_init ();
-
   meta_ui_init ();
 
   meta_restart_init ();
diff --git a/src/wayland/meta-wayland.c b/src/wayland/meta-wayland.c
index 7ab82fb..5b58a18 100644
--- a/src/wayland/meta-wayland.c
+++ b/src/wayland/meta-wayland.c
@@ -371,28 +371,41 @@ meta_wayland_log_func (const char *fmt,
   g_free (str);
 }
 
+static void
+meta_wayland_compositor_init (MetaWaylandCompositor *compositor)
+{
+  memset (compositor, 0, sizeof (MetaWaylandCompositor));
+  wl_list_init (&compositor->frame_callbacks);
+}
+
 void
-meta_wayland_init (void)
+meta_wayland_pre_clutter_init (void)
 {
   MetaWaylandCompositor *compositor = &_meta_wayland_compositor;
-  GSource *wayland_event_source;
 
-  memset (compositor, 0, sizeof (MetaWaylandCompositor));
+  meta_wayland_compositor_init (compositor);
+
+  /* Set up our logging. */
+  wl_log_set_handler_server (meta_wayland_log_func);
 
   compositor->wayland_display = wl_display_create ();
   if (compositor->wayland_display == NULL)
-    g_error ("failed to create wayland display");
+    g_error ("Failed to create the global wl_display");
 
-  wl_display_init_shm (compositor->wayland_display);
-  wl_log_set_handler_server (meta_wayland_log_func);
+  clutter_wayland_set_compositor_display (compositor->wayland_display);
+}
 
-  wl_list_init (&compositor->frame_callbacks);
+void
+meta_wayland_init (void)
+{
+  MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
+  GSource *wayland_event_source;
 
   if (!wl_global_create (compositor->wayland_display,
                         &wl_compositor_interface,
                         META_WL_COMPOSITOR_VERSION,
                         compositor, compositor_bind))
-    g_error ("Failed to register wayland compositor object");
+    g_error ("Failed to register the global wl_compositor");
 
   wayland_event_source = wayland_event_source_new (compositor->wayland_display);
 
@@ -407,9 +420,6 @@ meta_wayland_init (void)
    * synchronizing the two command streams. */
   g_source_set_priority (wayland_event_source, GDK_PRIORITY_EVENTS + 1);
   g_source_attach (wayland_event_source, NULL);
-  clutter_wayland_set_compositor_display (compositor->wayland_display);
-
-  meta_clutter_init ();
 
   meta_wayland_outputs_init (compositor);
   meta_wayland_data_device_manager_init (compositor);
diff --git a/src/wayland/meta-wayland.h b/src/wayland/meta-wayland.h
index 6feed48..860395d 100644
--- a/src/wayland/meta-wayland.h
+++ b/src/wayland/meta-wayland.h
@@ -25,6 +25,7 @@
 
 #include "meta-wayland-types.h"
 
+void                    meta_wayland_pre_clutter_init           (void);
 void                    meta_wayland_init                       (void);
 void                    meta_wayland_finalize                   (void);