--- B-Splines ---

Yes, I'm crazy.  I figured "why not?"  Let's see how difficult it is to do
this in Perl, and yet be speedy.

--- More Complex Shapes ---

Perhaps boxes with rounded corners would be a good start.

--- Hatched Fills ---

Not just solid fill patterns, but hatched (generated) patterns.  I already
have an idea how to do this.  I just have to put it in the code.
