Quoting Sebastian Breuers <[EMAIL PROTECTED]>:
i wondered if there is a possibility to check, if a point is in a given
selection by using an internal gimp function.
If it's not, could someone give me a hint, how to achieve this in creating an
own function?


I don't use Python-fu but the following Script-fu function should be easily ported (or perhaps you can find a better way):

(define (point-in-selection image x y)
  (let* (
      (saved (car (gimp-selection-save image)))
      (return-value)
      )
    (gimp-rect-select image x y 1 1 CHANNEL-OP-INTERSECT 0 0)
    (set! return-value (car (gimp-selection-is-empty image)))
    (gimp-selection-load saved)
    (if (= return-value 0)
      1
      0
      )
    )
  )

Note that the selection does not include the points at the rightmost and bottommost edges. For example, if the selection is from (0,0) to (10,10) then the point (10,10) is *not* "in" the selection but (9,9) is. You may need to adjust things to account for this.
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