[Bug 39998] New: WINED3DFMT_B5G5R5X1_UNORM to WINED3DFMT_B5G5R5A1_UNORM

https://bugs.winehq.org/show_bug.cgi?id=39998

Bug ID: 39998
           Summary: WINED3DFMT_B5G5R5X1_UNORM to WINED3DFMT_B5G5R5A1_UNORM
           Product: Wine
           Version: 1.9.1
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: directx-d3d
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 53441
  --> https://bugs.winehq.org/attachment.cgi?id=53441
WINED3DFMT_B5G5R5X1_UNORM to WINED3DFMT_B5G5R5A1_UNORM

All multimedia works in Medieval: Total War (AppDB Id=4109) with the exception
of the Strategy Mode's territory surface map -- it renders black.  There seems
to be ongoing development (julliard?) in this space, happy to test!  :)

In-game scrolling repeats the surface_convert_format conversion function
artifact, as recorded in the attachment.