gnome_canvas_aa bug ???

["Florent. Devin" <Florent Devin lifl fr>]

Hi,
I am trying to draw figure on canvas.
I first use an antialiased :
	
	gtk_widget_push_visual (gdk_rgb_get_visual ());
	gtk_widget_push_colormap (gdk_rgb_get_cmap ());
	canvas = gnome_canvas_new ();
	gtk_widget_pop_colormap ();
	gtk_widget_pop_visual ();
	gnome_canvas_set_scroll_region (GNOME_CANVAS (canvas), -10, -10, 300,
300);
	gtk_widget_show (canvas);
	Draw_in_canvas (GNOME_CANVAS (canvas));
And in Draw_in_canvas I use :
	item = gnome_canvas_item_new (group,
		gnome_canvas_polygon_get_type (),
		"points", points,
		"fill_color_rgba", 0X23F5A6FF,
		"outline_color_rgba", 0X000000FF,
		"width_pixels", 1,
		NULL);
This draw a polygon without filling it.
If I use a Gdk canvas :
	gtk_widget_push_visual (gdk_imlib_get_visual ());
	gtk_widget_push_colormap (gdk_imlib_get_colormap ());
	canvas = gnome_canvas_new ();
	gtk_widget_pop_colormap ();
	gtk_widget_pop_visual ();
	gnome_canvas_set_scroll_region (GNOME_CANVAS (canvas), -10, -10, 300,
300);
	gtk_widget_show (canvas);
	Draw_in_canvas (GNOME_CANVAS (canvas));

My figure is filled.
So is it a bug in antialiased canvas ?
Is this feature not supported in aa ?
Am I missing something ?
-- 
Florent DEVIN