First of, thanks for the quick answers!

> Why do you think it would speed scrolling, though? Scrolling is =
> generally buffered on most platforms anyway, so adding an additional =
> indirection might not make any differences and might even feasibly be =
> slower, so...

How does scrolling work if not by copying a buffer onto itself? Is there a 
special function for that? Unless, of course, you just rendered the whole area, 
which might be feasible in GUI rendering(though in text editors that'd still be 
a bit odd), but in my case I'm using FLTK to render a game world, so I can't 
really have everything rendered at once. :P
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