[Bug 10400] New: Horible performance with OffscreenRenderingMode= fbo in Counter Strike source "Video stess test"

http://bugs.winehq.org/show_bug.cgi?id=10400

Summary: Horible performance with OffscreenRenderingMode=fbo in
                    Counter Strike source "Video stess test"
           Product: Wine
           Version: 0.9.49.
          Platform: PC
               URL: http://appdb.winehq.org/objectManager.php?sClass=version
                    &iId=3731
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: wine-directx-d3d
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

With OffscreenRenderingMode set to "fbo" I'm getting less then 1 fps in Counter
Strike Source Video stress test. Disabling monitors with "cl_drawmonitors 0"
makes it much faster (30+ FPS).

Major because it affects lots of other games. Also since development goes
towards making FBO a default instead of back buffer.