Is it possible to invert the colors of a Athens Canvas?
After some digging I found paintMode and paintTransform; however the former
doesn't support such method (maybe some combination of xor and over?); and
the former is only for some specific colors.
I also tried changing
Color>>asAthensPaintOn:
^ (Color white - self) alpha: (self alpha) "invert the color"
and while this works nicely for most cases, it is overriding a library and
_doesn't_ work for bitmaps (for obvious reasons).
So is there some way how to invert it? Effectively a mask over the canvas.
(Doing it at Morphic level should also be a viable option, provided it is
possible there).
Thanks,
Peter
