[Bug 38875] DirectDraw: blitting from Offscreen Plain surface to Primary Surface displays black instead

https://bugs.winehq.org/show_bug.cgi?id=38875

--- Comment #5 from Dan Weiss  ---
I believe that the blit that fails is the one from the offscreen surface to the
primary surface.  This is the DirectDraw blit itself, not the DC blit.  I had
tried locking the offscreen surface and checking whether it was solid black or
not, and it wasn't.