I suppose window positions and sizes should be in points as well.
Code to draw in the icon window, which is created by Window Maker of a
fixed size - in pixels - will need to be adjusted so that it draws using
the new API in points but making sure the result fits into a icon window
of a certain fixed size - in pixels.
Last, it is quite possible/nearly certain that after we convert everything
to draw in points, it will not look right, because of the uneven scaling
so some lines might be too big, other too little ... We probably need to
implement some sort of anti-alias drawing of lines etc to work around
this.
To make it all work, quite big improvement of our backend code is needed -
might be an exciting improvement when we get there.