[Bug 21204] New: Warcraft 3 disproportionately slow in d3d mode unless RenderTargetLockMode=disabled

http://bugs.winehq.org/show_bug.cgi?id=21204

Summary: Warcraft 3 disproportionately slow in d3d mode unless
                    RenderTargetLockMode=disabled
           Product: Wine
           Version: 1.1.33
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: directx-d3d
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Under default settings, Warcraft 3 runs very slowly on my system, whose
hardware is more than capable of of running it without framerate issues. When
run in OpenGL mode, the game runs smoothly without exception (60fps), but there
are probems with the rendering. In Direct3D mode, it renders correctly, but the
framerate is very low, under 15 fps. In the search for a playable
configuration, I discovered that setting
HKEY_CURRENT_USER\Software\Wine\Direct3D:RenderTargetLockMode to disabled
results in much better framerates, around 30 fps. This isn't as good as the
OpenGL mode, but is still playable, and I didn't notice any rendering problems.

I tried some of the other possibilities (textex, readtex, texread, I think),
and the performance was just as slow.

I also discovered just now that Warcraft 3 has a registry setting,
HKEY_CURRENT_USER\Software\Blizzard Entertainment\Warcraft III\Video:lockfb,
which acts similarly (defaults to on, and when set to 0, performance becomes
acceptable). If neither of those two values are disabled, then performance is
disproportionately slow on this hardware.

I can grab debug output on request.