To determine if `mirroring_state` is needed, we want to compare the
untransformed dimensions of the source output to the target outputs
mode. The fact the mode comparision previously compared refresh rate
(since it compared the whole `Mode`) seems unintended.
We also re-create the `MirroringState` when the source output
dimensions changes.
Apply inverse of output transform to mode to get render size, and apply
no transform during rendering. The transform of the output being
mirrored from shouldn't affect the final render.
Fixes issues when source output for mirroring has a transform, and also
fixes issues in https://github.com/pop-os/cosmic-comp/pull/1058
when this code is used for postprocessing, where this resulted in the
same transform being applied twice.
This is increasingly not just related to screencopy, so it's weird to
add there. I don't see any other module that fits, so add one called
"quirks" (like the Linux kernel uses for device-specific handling in
generic drives).
This allows `cosmic-workspaces` to rely on cosmic-comp for rendering the
background, and just have transparency. This should be a more reliable
and performant way of doing things, at least for now.
Instead of adding another opaque bool argument, this defines an
`ElementFilter` enum, which makes calls more readable.
Window surfaces are still included in screencopy, as needed for the
workspace previews.
