[Bug 18227] New: HL2 Ep2 / Portal: Massive slowdown in some areas

http://bugs.winehq.org/show_bug.cgi?id=18227

Summary: HL2 Ep2 / Portal: Massive slowdown in some areas
           Product: Wine
           Version: 1.1.20
          Platform: PC-x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: directx-d3d
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Entering certain areas in Portal or HL2 Ep2 lets the game slow down big time.

The slowdown is accompanied with these FIXMEs:
fixme:d3d_surface:surface_load_ds_location (0x1587a8) Not supported with fixed
up depth stencil
fixme:d3d:fixed_get_input Unsupported input stream
[usage=WINED3DDECLUSAGE_POSITION, usage_idx=1]
fixme:d3d:fixed_get_input Unsupported input stream
[usage=WINED3DDECLUSAGE_NORMAL, usage_idx=1]

I suspect this is triggering by the game trying to use vertex tweening.