Releasing the last reference to a surface interface has a significant
performance impact. Mitigating the issue by eliminating some frequent
but unnecessary QueryInterface calls.
Fixes most of the performance drop reported in issue #24.
8/16 bit display mode emulation is now implemented internally instead of
relying on the builtin Windows shims, as those are sometimes unreliable
(not triggering for some games on some systems when they should).
External DirectDraw hooks (such as the DWM8And16BitMitigation shim)
are disabled to avoid interference.
Fixes issues reported in #8, #9, #15.
This change assigns a different DirectDraw repository object for each original
DirectDraw object that requires temporary surfaces, ensuring that video memory
surfaces are created on the appropriate device on a multi-GPU system.
