[plt-scheme] bitmaps as bytes or ports

At Fri, 15 May 2009 14:55:20 -0400, David Van Horn wrote:
> Using load-file and save-file it is possible to create and save bitmap%s 
>   from file.  Is it possible to do the same with a port or byte string?

No. This is annoying, but it's difficult to fix with the current
implementation --- and it's yet another thing that should be better if
we manage to re-implement MrEd.

Meanwhile, you have to use a temporary file (see `make-temporary-file').