monitor-manager: Let backend implementations handle inital config

How the initial configuration is done depends on the backend, so let
them do it themself.

https://bugzilla.gnome.org/show_bug.cgi?id=777732

src/backends/meta-monitor-manager-dummy.c

@@ -169,6 +169,14 @@ meta_monitor_manager_dummy_read_current (MetaMonitorManager *manager)
     }
 }
 
+static void
+meta_monitor_manager_dummy_ensure_initial_config (MetaMonitorManager *manager)
+{
+  meta_monitor_manager_ensure_configured (manager);
+
+  meta_monitor_manager_update_logical_state_derived (manager);
+}
+
 static void
 meta_monitor_manager_dummy_apply_config (MetaMonitorManager *manager,
                                          MetaCrtcInfo       **crtcs,
@@ -289,6 +297,7 @@ meta_monitor_manager_dummy_class_init (MetaMonitorManagerDummyClass *klass)
   MetaMonitorManagerClass *manager_class = META_MONITOR_MANAGER_CLASS (klass);
 
   manager_class->read_current = meta_monitor_manager_dummy_read_current;
+  manager_class->ensure_initial_config = meta_monitor_manager_dummy_ensure_initial_config;
   manager_class->apply_configuration = meta_monitor_manager_dummy_apply_config;
 }
 

src/backends/meta-monitor-manager-private.h

@@ -298,6 +298,8 @@ struct _MetaMonitorManagerClass
   GBytes* (*read_edid) (MetaMonitorManager *,
                         MetaOutput         *);
 
+  void (*ensure_initial_config) (MetaMonitorManager *);
+
   void (*apply_configuration) (MetaMonitorManager  *,
                                MetaCrtcInfo       **,
                                unsigned int         ,
@@ -411,6 +413,10 @@ void               meta_monitor_manager_tiled_monitor_added (MetaMonitorManager
 void               meta_monitor_manager_tiled_monitor_removed (MetaMonitorManager *manager,
                                                                MetaMonitor        *monitor);
 
+void               meta_monitor_manager_ensure_configured (MetaMonitorManager *manager);
+
+void               meta_monitor_manager_update_logical_state_derived (MetaMonitorManager *manager);
+
 void meta_monitor_manager_clear_output (MetaOutput *output);
 void meta_monitor_manager_clear_mode (MetaCrtcMode *mode);
 void meta_monitor_manager_clear_crtc (MetaCrtc *crtc);

src/backends/meta-monitor-manager.c

@@ -120,7 +120,7 @@ derive_monitor_position (MetaMonitor *monitor,
 }
 
 static void
-make_logical_config (MetaMonitorManager *manager)
+meta_monitor_manager_rebuild_logical_monitors_derived (MetaMonitorManager *manager)
 {
   GList *logical_monitors = NULL;
   GList *l;
@@ -200,6 +200,12 @@ power_save_mode_changed (MetaMonitorManager *manager,
   manager->power_save_mode = mode;
 }
 
+static void
+meta_monitor_manager_ensure_initial_config (MetaMonitorManager *manager)
+{
+  META_MONITOR_MANAGER_GET_CLASS (manager)->ensure_initial_config (manager);
+}
+
 gboolean
 meta_monitor_manager_has_hotplug_mode_update (MetaMonitorManager *manager)
 {
@@ -223,6 +229,12 @@ legacy_ensure_configured (MetaMonitorManager *manager)
     meta_monitor_config_make_default (manager->legacy_config, manager);
 }
 
+void
+meta_monitor_manager_ensure_configured (MetaMonitorManager *manager)
+{
+  legacy_ensure_configured (manager);
+}
+
 static void
 meta_monitor_manager_constructed (GObject *object)
 {
@@ -237,19 +249,8 @@ meta_monitor_manager_constructed (GObject *object)
 
   meta_monitor_manager_read_current_state (manager);
 
-  legacy_ensure_configured (manager);
+  meta_monitor_manager_ensure_initial_config (manager);
 
-  /* Under XRandR, we don't rebuild our data structures until we see
-     the RRScreenNotify event, but at least at startup we want to have
-     the right configuration immediately.
-
-     The other backends keep the data structures always updated,
-     so this is not needed.
-  */
-  if (META_IS_MONITOR_MANAGER_XRANDR (manager))
-    meta_monitor_manager_read_current_state (manager);
-
-  make_logical_config (manager);
   initialize_dbus_interface (manager);
 
   manager->in_init = FALSE;
@@ -1533,6 +1534,15 @@ meta_monitor_manager_read_current_state (MetaMonitorManager *manager)
   meta_monitor_manager_free_crtc_array (old_crtcs, n_old_crtcs);
 }
 
+static void
+meta_monitor_manager_notify_monitors_changed (MetaMonitorManager *manager)
+{
+  MetaBackend *backend = meta_get_backend ();
+
+  meta_backend_monitors_changed (backend);
+  g_signal_emit_by_name (manager, "monitors-changed");
+}
+
 static void
 meta_monitor_manager_update_monitor_modes_derived (MetaMonitorManager *manager)
 {
@@ -1546,10 +1556,16 @@ meta_monitor_manager_update_monitor_modes_derived (MetaMonitorManager *manager)
     }
 }
 
+void
+meta_monitor_manager_update_logical_state_derived (MetaMonitorManager *manager)
+{
+  meta_monitor_manager_rebuild_logical_monitors_derived (manager);
+  meta_monitor_manager_update_monitor_modes_derived (manager);
+}
+
 void
 meta_monitor_manager_rebuild_derived (MetaMonitorManager *manager)
 {
-  MetaBackend *backend = meta_get_backend ();
   GList *old_logical_monitors;
 
   if (manager->in_init)
@@ -1557,16 +1573,9 @@ meta_monitor_manager_rebuild_derived (MetaMonitorManager *manager)
 
   old_logical_monitors = manager->logical_monitors;
 
-  make_logical_config (manager);
-  meta_monitor_manager_update_monitor_modes_derived (manager);
+  meta_monitor_manager_update_logical_state_derived (manager);
 
-  /* Tell the backend about that the monitors changed before emitting the
-   * signal, so that the backend can prepare itself before all the signal
-   * consumers.
-   */
-  meta_backend_monitors_changed (backend);
-
-  g_signal_emit_by_name (manager, "monitors-changed");
+  meta_monitor_manager_notify_monitors_changed (manager);
 
   g_list_free_full (old_logical_monitors, g_object_unref);
 }

src/backends/native/meta-monitor-manager-kms.c

@@ -1337,6 +1337,14 @@ set_underscan (MetaMonitorManagerKms *manager_kms,
     }
 }
 
+static void
+meta_monitor_manager_kms_ensure_initial_config (MetaMonitorManager *manager)
+{
+  meta_monitor_manager_ensure_configured (manager);
+
+  meta_monitor_manager_update_logical_state_derived (manager);
+}
+
 static void
 meta_monitor_manager_kms_apply_configuration (MetaMonitorManager *manager,
                                               MetaCrtcInfo       **crtcs,
@@ -1922,6 +1930,7 @@ meta_monitor_manager_kms_class_init (MetaMonitorManagerKmsClass *klass)
 
   manager_class->read_current = meta_monitor_manager_kms_read_current;
   manager_class->read_edid = meta_monitor_manager_kms_read_edid;
+  manager_class->ensure_initial_config = meta_monitor_manager_kms_ensure_initial_config;
   manager_class->apply_configuration = meta_monitor_manager_kms_apply_configuration;
   manager_class->set_power_save_mode = meta_monitor_manager_kms_set_power_save_mode;
   manager_class->get_crtc_gamma = meta_monitor_manager_kms_get_crtc_gamma;

src/backends/x11/meta-monitor-manager-xrandr.c

@@ -1279,6 +1279,21 @@ meta_monitor_manager_xrandr_apply_configuration (MetaMonitorManager *manager,
   XFlush (manager_xrandr->xdisplay);
 }
 
+static void
+meta_monitor_manager_xrandr_ensure_initial_config (MetaMonitorManager *manager)
+{
+  meta_monitor_manager_ensure_configured (manager);
+
+  /*
+   * Normally we don't rebuild our data structures until we see the
+   * RRScreenNotify event, but at least at startup we want to have the right
+   * configuration immediately.
+   */
+  meta_monitor_manager_read_current_state (manager);
+
+  meta_monitor_manager_update_logical_state_derived (manager);
+}
+
 static void
 meta_monitor_manager_xrandr_change_backlight (MetaMonitorManager *manager,
 					      MetaOutput         *output,
@@ -1571,6 +1586,7 @@ meta_monitor_manager_xrandr_class_init (MetaMonitorManagerXrandrClass *klass)
 
   manager_class->read_current = meta_monitor_manager_xrandr_read_current;
   manager_class->read_edid = meta_monitor_manager_xrandr_read_edid;
+  manager_class->ensure_initial_config = meta_monitor_manager_xrandr_ensure_initial_config;
   manager_class->apply_configuration = meta_monitor_manager_xrandr_apply_configuration;
   manager_class->set_power_save_mode = meta_monitor_manager_xrandr_set_power_save_mode;
   manager_class->change_backlight = meta_monitor_manager_xrandr_change_backlight;

src/tests/meta-monitor-manager-test.c

@@ -83,6 +83,14 @@ meta_monitor_manager_test_read_current (MetaMonitorManager *manager)
   manager->n_outputs = manager_test->test_setup->n_outputs;
 }
 
+static void
+meta_monitor_manager_test_ensure_initial_config (MetaMonitorManager *manager)
+{
+  meta_monitor_manager_ensure_configured (manager);
+
+  meta_monitor_manager_update_logical_state_derived (manager);
+}
+
 static void
 meta_monitor_manager_test_apply_configuration (MetaMonitorManager *manager,
                                                MetaCrtcInfo      **crtcs,
@@ -240,6 +248,7 @@ meta_monitor_manager_test_class_init (MetaMonitorManagerTestClass *klass)
   object_class->dispose = meta_monitor_manager_test_dispose;
 
   manager_class->read_current = meta_monitor_manager_test_read_current;
+  manager_class->ensure_initial_config = meta_monitor_manager_test_ensure_initial_config;
   manager_class->apply_configuration = meta_monitor_manager_test_apply_configuration;
   manager_class->tiled_monitor_added = meta_monitor_manager_test_tiled_monitor_added;
   manager_class->tiled_monitor_removed = meta_monitor_manager_test_tiled_monitor_removed;