[WIP] Oit weighted - generalization #2230
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I'm starting this PR on the main repo in order to get feedback. This is a continuation on #2039, attempting to implement a generalization where each
Visual
provides anis_transparent
flag.The new code is not clean (a lot of ugly
isinstance
andhasattr
), but should work and provides a proof of concept.Unfortunately, I tried to add markers to the example and things fail; specifically, it's due to a couple of line (which @asnt already identified as problematic) where
_prepare_draw
needs to be called with no view (which causes all sort of error if the view is needed).