PangoLayout onto a GDK drawablegdkDrawLayout(object, gc, x, y, layout)objectgcxylayoutPangoContext has a transformation matrix set, then
x and y specify the position of the top left corner of the
bounding box (in device space) of the transformed layout.
If you're using GTK+, the usual way to obtain a PangoLayout
is gtkWidgetCreatePangoLayout.