Retrieves any font rendering options previously set with
pango_cairo_context_set_font_options(). This function does not report options
that are derived from the target surface by pango_cairo_update_context()
the font options previously set on the
context, or %NULL if no options have been set. This value is
owned by the context and must not be modified or freed.
Retrieves any font rendering options previously set with pango_cairo_context_set_font_options(). This function does not report options that are derived from the target surface by pango_cairo_update_context()