a Cairo context with current point set to where the shape should be rendered
the %PANGO_ATTR_SHAPE to render
whether only the shape path should be appended to current path of cr and no filling/stroking done. This will be set to %TRUE when called from pango_cairo_layout_path() and pango_cairo_layout_line_path() rendering functions.
Function type for rendering attributes of type %PANGO_ATTR_SHAPE with Pango's Cairo renderer.