[m-rev.] Xlib interface for extras

[Ralph Becket]

Julien Fischer, Thursday, 23 September 2004:
> 
> >     % One must open a display in order to create a window.
> >     %
> > :- type display == xlib.display_ptr.
> >
> Couldn't this type and several of the others in the interface
> of this module be abstract?

It could.  Do you think it would be better to make display etc. abstract
and, if there is later any call for it, provide a predicate to expose
the xlib level representations of these things?

> Also, there doesn't seem to be any (easy) way of drawing a single
> pixel at a particular location - I suggest you add a draw_pixel
> predicate.

Hmm.  The abstract coordinate system doesn't really work in terms of
pixels (although you can give line widths in pixels).  It would be
easy to add, I suppose.  I'll do that to keep you happy.

-- Ralph
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