Sets callback function for context to use for rendering attributes of type pango_attr_shape.
See `PangoCairoShapeRendererFunc` for details.
Retrieves callback function and associated user data for rendering attributes of type pango_attr_shape as set by [[email protected]_set_shape_renderer], if any.
context |
a `PangoContext`, from a pangocairo font map |
data |
Pointer to `gpointer` to return user data |
the shape rendering callback previously set on the context, or null if no shape rendering callback have been set. |