osx: Clean up the backend implementation

Instead of implementing create_stage() and a constructor for
ClutterStageOSX, we can use the default implementations in
ClutterBackend, and spare us some code duplication.

clutter/osx/clutter-backend-osx.c

@@ -71,27 +71,8 @@ clutter_backend_osx_post_parse (ClutterBackend  *backend,
 static ClutterFeatureFlags
 clutter_backend_osx_get_features (ClutterBackend *backend)
 {
-  return CLUTTER_FEATURE_STAGE_MULTIPLE|CLUTTER_FEATURE_STAGE_USER_RESIZE;
-}
-
-static ClutterStageWindow*
-clutter_backend_osx_create_stage (ClutterBackend  *backend,
-                                  ClutterStage    *wrapper,
-                                  GError         **error)
-{
-  ClutterStageWindow *impl;
-
-  CLUTTER_OSX_POOL_ALLOC();
-
-  impl = _clutter_stage_osx_new (backend, wrapper);
-
-  CLUTTER_NOTE (BACKEND, "create_stage: wrapper=%p - impl=%p",
-                wrapper,
-                impl);
-
-  CLUTTER_OSX_POOL_RELEASE();
-
-  return impl;
+  return CLUTTER_FEATURE_STAGE_MULTIPLE
+       | CLUTTER_FEATURE_STAGE_USER_RESIZE;
 }
 
 void
@@ -127,7 +108,7 @@ clutter_backend_osx_create_context (ClutterBackend  *backend,
        */
       NSOpenGLPixelFormatAttribute attrs[] = {
         NSOpenGLPFADoubleBuffer,
-        NSOpenGLPFADepthSize, 24,
+        NSOpenGLPFADepthSize, 32,
         NSOpenGLPFAStencilSize, 8,
         0
       };
@@ -174,6 +155,7 @@ clutter_backend_osx_ensure_context (ClutterBackend *backend,
       g_assert (CLUTTER_IS_STAGE_OSX (impl));
       stage_osx = CLUTTER_STAGE_OSX (impl);
 
+      [backend_osx->context clearDrawable];
       [backend_osx->context setView:stage_osx->view];
       [backend_osx->context makeCurrentContext];
     }
@@ -235,7 +217,6 @@ clutter_backend_osx_class_init (ClutterBackendOSXClass *klass)
 
   backend_class->post_parse         = clutter_backend_osx_post_parse;
   backend_class->get_features       = clutter_backend_osx_get_features;
-  backend_class->create_stage       = clutter_backend_osx_create_stage;
   backend_class->create_context     = clutter_backend_osx_create_context;
   backend_class->ensure_context     = clutter_backend_osx_ensure_context;
 }

clutter/osx/clutter-stage-osx.c

@@ -128,7 +128,7 @@ clutter_stage_osx_get_wrapper (ClutterStageWindow *stage_window);
 
 - (NSSize) windowWillResize:(NSWindow *) sender toSize:(NSSize) frameSize
 {
-  if ( clutter_stage_get_user_resizable (self->stage_osx->wrapper) )
+  if (clutter_stage_get_user_resizable (self->stage_osx->wrapper))
     {
       guint min_width, min_height;
       clutter_stage_get_minimum_size (self->stage_osx->wrapper,
@@ -143,7 +143,7 @@ clutter_stage_osx_get_wrapper (ClutterStageWindow *stage_window);
 
 - (void)windowDidChangeScreen:(NSNotification *)notification
 {
-  clutter_stage_ensure_redraw (CLUTTER_STAGE(self->stage_osx->wrapper));
+  clutter_stage_ensure_redraw (CLUTTER_STAGE (self->stage_osx->wrapper));
 }
 @end
 
@@ -203,8 +203,8 @@ clutter_stage_osx_get_wrapper (ClutterStageWindow *stage_window);
   stage_osx->requisition_width = [self bounds].size.width;
   stage_osx->requisition_height = [self bounds].size.height;
   clutter_actor_set_size (CLUTTER_ACTOR (self->stage_osx->wrapper),
-                          (int)[self bounds].size.width,
-                          (int)[self bounds].size.height);
+                          stage_osx->requisition_width,
+                          stage_osx->requisition_height);
 
   [self removeTrackingRect:tracking_rect];
   tracking_rect = [self addTrackingRect:[self bounds]
@@ -609,26 +609,6 @@ clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
   iface->redraw             = clutter_stage_osx_redraw;
 }
 
-/*************************************************************************/
-ClutterStageWindow *
-_clutter_stage_osx_new (ClutterBackend *backend,
-                        ClutterStage   *wrapper)
-{
-  ClutterStageOSX *self;
-
-  self = g_object_new (CLUTTER_TYPE_STAGE_OSX,
-                       "backend", backend,
-                       "wrapper", wrapper,
-                       NULL);
-
-  self->isHiding = false;
-  self->haveRealized = false;
-  self->view = NULL;
-  self->window = NULL;
-
-  return CLUTTER_STAGE_WINDOW (self);
-}
-
 /*************************************************************************/
 static void
 clutter_stage_osx_init (ClutterStageOSX *self)
@@ -636,6 +616,11 @@ clutter_stage_osx_init (ClutterStageOSX *self)
   self->requisition_width  = 640;
   self->requisition_height = 480;
   self->acceptFocus = TRUE;
+
+  self->isHiding = false;
+  self->haveRealized = false;
+  self->view = NULL;
+  self->window = NULL;
 }
 
 static void

clutter/osx/clutter-stage-osx.h

@@ -82,9 +82,6 @@ struct _ClutterStageOSXClass
 
 GType _clutter_stage_osx_get_type (void) G_GNUC_CONST;
 
-ClutterStageWindow *    _clutter_stage_osx_new  (ClutterBackend *backend,
-                                                 ClutterStage   *wrapper);
-
 G_END_DECLS
 
 #endif /* __CLUTTER_STAGE_OSX_H__ */