These methods ask an itexticlass object to render its intuitext structure,
which it gets from the imageclass ia_data attribute.  an itexticlass
object renders its IntuiText relative to the ia_left and ia_top attributes
it inherits from imageclass.  This method uses the JAM1 drawing mode and
the ia_fgpen to render the text.  see the imageclass description of
im_draw/im_drawframe for more details.