[racket] get-slides-as-picts dimensions

At Mon, 31 Oct 2011 17:53:40 -0600, Jon Rafkind wrote:
> I hacked up this short program to fade between slides. It seems to
> work well (although it won't work for animations) but I'm wondering
> how to get rid of the hard coded size constraints (640, 480). I just
> want to generate slides that would be the normal size they would have
> looked like if I was running x.rkt.

A slide in Slideshow is always drawn as 1024 by 768 (and that size is
scaled to fit the actual screen size).