> - Should I render in an offline buffer using a special
> compositing mode and lookup afterward ?
The good-old hit-test function used since the '80s is to
allocate a 1-pixel bitmap to render into, and make sure
that that pixel is the point you're interested in
intersecting with (using 2D offset/changing the origin).
Clear it to white, render your thing in black, and then
see if the pixel changed color.
If you want a mathematical intersection, this won't
help, of course.
Cheers,
/ h+
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