Move GdkVisual parallel-implementable

It turned out no vfuncs were necessary. I've decided to move
the screen member up to GdkVisual, since it is the same in all
backends. The X11 backend subclasses now, to add the X members
that it needs to keep track of. GdkVisual and GdkVisualClass
are hidden now.

1 files changed, 38 insertions, 1 deletions

diff --git a/gdk/gdkvisual.c b/gdk/gdkvisual.c
index 15f681d3c6..b0201b2599 100644
--- a/gdk/gdkvisual.c
+++ b/gdk/gdkvisual.c
@@ -25,7 +25,6 @@
 
 #include "gdkinternals.h"
 #include "gdkvisual.h"
-
 #include "gdkscreen.h"
 
 
@@ -55,6 +54,26 @@
  * then %GDK_VISUAL_STATIC_GRAY.
  */
 
+G_DEFINE_TYPE (GdkVisual, gdk_visual, G_TYPE_OBJECT)
+
+static void
+gdk_visual_init (GdkVisual *visual)
+{
+}
+
+static void
+gdk_visual_finalize (GObject *object)
+{
+  G_OBJECT_CLASS (gdk_visual_parent_class)->finalize (object);
+}
+
+static void
+gdk_visual_class_init (GdkVisualClass *visual_class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (visual_class);
+
+  object_class->finalize = gdk_visual_finalize;
+}
 
 /**
  * gdk_list_visuals:
@@ -428,3 +447,21 @@ gdk_visual_get_blue_pixel_details (GdkVisual *visual,
   if (precision)
     *precision = visual->blue_prec;
 }
+
+/**
+ * gdk_visual_get_screen:
+ * @visual: a #GdkVisual
+ *
+ * Gets the screen to which this visual belongs
+ *
+ * Return value: (transfer none): the screen to which this visual belongs.
+ *
+ * Since: 2.2
+ */
+GdkScreen *
+gdk_visual_get_screen (GdkVisual *visual)
+{
+  g_return_val_if_fail (GDK_IS_VISUAL (visual), NULL);
+
+  return visual->screen;
+}