gtk-bar-990524-0.patch
patch for Gtk 1.2.3

This patch allows to specify an operation code (like in XShapeCombineMask)
when applying shapes to containers.

A new enum type is provided in gdk/gdktypes.h 

	typedef enum {
		GDK_SHAPE_SET,			/* ShapeSet */
		GDK_SHAPE_UNION,		/* ShapeUnion */
		GDK_SHAPE_INTERSECT,	/* ShapeIntersect */
		GDK_SHAPE_SUBTRACT,		/* ShapeSubtract */
		GDK_SHAPE_INVERT		/* ShapeInvert */
	} GdkShapeOp;
	
A new function is included in gdk/gdkwindow.c

	void gdk_window_shape_combine_mask_with_op(
		GdkWindow	*window,
		GdkBitmap	*mask,
		gint		x,
		gint		y,
		GdkShapeOp	shape_op)

And another new function in gtk/gtkwidget.c

	void gtk_widget_shape_combine_mask_with_op(
		GtkWidget	*widget,
		GdkBitmap	*shape_mask,
		gint	 	offset_x,
		gint	 	offset_y,
		GdkShapeOp	shape_op)

Whith these functions, we can , i.e to put two pixmaps in a fixed widget and then apply the union
of their masks to the fixed widget.