ink rectangle to assign to each character
logical rectangle to assign to each character
user data pointer
function to copy data when the attribute is copied. If NULL, data is simply copied as a pointer.
function to free data when the attribute is freed, or NULL
the newly allocated PangoAttribute, which should be freed with pango_attribute_destroy().
Like pango_attr_shape_new(), but a user data pointer is also provided; this pointer can be accessed when later rendering the glyph. Since 1.8