Actually I don't think we have a good solution for this yet.
When it was last discussed (Den Haag?) and some times before I suggested
we should just do shadow updates when the input area changes (or some
other client-initiated call). What we shouldn't do is try to generate a
new shaped shadow on every frame, unless there's reason to believe the
shape has changed.
** Summary changed:
- Too much shadow for shaped surfaces
+ Incorrect shadows for non-rectangular windows
** Changed in: mir
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1662433
Title:
Incorrect shadows for non-rectangular windows
Status in Canonical System Image:
New
Status in Mir:
Triaged
Status in unity8 package in Ubuntu:
New
Bug description:
There is too much (inappropriate) shadow rendered for non-rectangular
surfaces.
Test case:
$ mir_demo_client_egltriangle -b0 -- --desktop_file_hint=unity8
Expected:
Either a shaped shadow or none at all.
Observed:
In Unity8 there is a constant shadow over the background.
In mir_proving_server there is a line of shadow around the invisible border.
Both are wrong.
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