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.
Windowed mode presentation is changed to use a series of blits clipped to
each top level window to work around performance issues when a clipper uses
a clip list instead of a window. Otherwise DirectDraw uses StretchBlt rather
than the driver Present call even if the clip list is a single rectangle
matching the window client area.
Fixes a performance issue reported in issue #24.
Changed primary surface caps to report video memory in case the surface
was only forced into system memory by DDrawCompat.
Fixes startup issues in C&C 95 and Red Alert, reported in issue #3.
Added proper installation of hooks when DirectDraw interfaces are instantiated
through the COM API (e.g. with CoCreateInstance).
Fixes a crash in Warhammer 40,000: Chaos Gate mentioned in issue #15.
When the primary surface chain is requested to be created in system memory,
flip should be emulated (copy from back buffer to front buffer) to be
consistent with legacy DirectDraw behavior.
Fixes flashing graphical artifacts in Carmageddon (Win95 version) menus
when exiting from a race, mentioned in issue #3.
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.
DirectDraw does not properly update the clip lists of IDirectDrawClipper
objects that are using window handles. (Probably it only tracks child window
changes and not other overlapping windows when composition is enabled).
Clip lists are now manually calculated and updated on window position
changes instead.
Fixes "invisible" GDI windows in O2Jam (issue #9).
When the display mode changes in full screen mode, DirectDraw resets
the main window to topmost after a short delay, generating a
WM_WINDOWPOSCHANGED message. This could cause an unnecessary repainting
of the window, erasing the background even if nothing needed to be updated.
Now only the regions that change during window repositioning are redrawn.
Fixes the black flashing in Rogue Spear's menus after display mode changes,
mentioned in issue #2.
