I'm ready to add invalidated bounds testing to our
testsuite, but it seems I can't handle to understand the
mechanism of it.
What I would expect is that:
0) get_invalidated_bounds is misnamed, should be
expand_to_invalidated_bounds() as it actually
expands the given rect to enclose the invalidated bounds.
1) Before *any* ::advance() is called, the
get_invalidated_bounds() should add NOTHING
to the provided bounds.
2) After *first* call to advance(), the get_invalidated_bounds()
should turn the bounds into the WORLD bounds (everything changed)
3) From *second* call on, the get_invalidated_bounds() should
only add the boundaries of things that actually changed
since when ? Last call to ::display ? Last call to
get_invalidated_bounds () ??
--strk;
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