🚀 go-pugleaf

Excerpts from netnews.rec.games.programmer: 15-Dec-92 Re: Xlib Clipping
Revisited Michael Duffy@aludra.usc (1997)

> Now what I haven't figured out is how to clip a compiled bitmap say top and
> left or top and right........  Hmmmmm...... this one's probably not possible,
> or would slow the code down so much that you'd lose the advantages of 
> compiling it.

Actually, I am just realizing how silly this whole thing is.  Why clip? 
Just do a trivial accept/reject from the bitmap to the clipping
rectangle.  If it's accepted, jump to the compiled routine.  If not, use
a slower clipped version (you could also have a horizontally-clipped
compiled version which I think should still be really fast).  Most
game's don't clip *that* much, and the overhead of intersecting
rectangles is miniscule..

-court