> for it in selection
> 	Pixel color = red;
> 	if (it.y() % 10 == 0 ||
> 	    it.x() % 20 == 0)
> 		color = black;
>
> 	*it = color;
>
except that % is a very slow operation (I know it for trying to use it a lot 
in iterators).

-- 
--- Cyrille Berger ---
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