Painting Negative

Hi,

I've got a JLayeredPane, on which I put an "ImagePanel" (which simply
shows an image, nothing special) on layer 0.

Then I want to add another component on layer 1, so that the whole
ImagePanel will be covered by, let's say a black rectangle. Still easy.

But then I want to be able to define Polygons and this polygons should
NOT be drawn on the layer 1 component, so that in this polygons the
ImagePanel below is visible...

So the big question is: How can I fill everything EXCEPT the polygons?

Flo
.

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