PangoRenderer for a screen. This default renderer
is shared by all users of the display, so properties such as the color
or transformation matrix set for the renderer may be overwritten
by functions such as gdkDrawLayout.gdkPangoRendererGetDefault(screen)PangoRenderer] the default PangoRenderer for screen.gdkPangoRendererSetDrawable
and gdkPangoRendererSetGc to set the drawable and graphics context
to use for drawing. Since 2.6