> What I'd like to see is that the black pixels of the watermark image are
> treated as "clear" so that shapes drawn there are not obscured at all.

You need to give them 0 alpha somehow.  If the watermark was something
you drew yourself then you can start with a blank INT_ARGB image and just
not fill in the background.  An INT_ARGB image is clear upon construction.

If the watermark was an image you loaded from a file then you will need
to use an image format that has alpha or filter it yourself to turn all
of the black colors clear (there is no  built-in filter that does that
as far as I know).  1.3 supports PNG which supports a full alpha channel
so the solution might be as simple as converting the watermark image to
PNG and making the background transparent...

                                ...jim

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