[cairo] recursive quad-tree, or bounding box of changed area during drawing?

[Leon Woestenberg]

Hello all,
>
> I am not yet in the stadium where I can do on-target profiling, but I 
> do want to find out if cheap paths are available to calculate dirty 
> regions.
> Any insights are welcome while I dumbly spit through the code :-)
I think I wanted to respectfully say "spade through the code" here, but 
wrote down the dutch translation instead, which might be very offensive 
for you guys. ;-)

Leon /hides away