[Bug 39421] Majesty Gold HD runs very slowly

https://bugs.winehq.org/show_bug.cgi?id=39421

--- Comment #11 from Jonas Maebe  ---
I looked a bit through the wined3d code this weekend, and it seems it already
partly works the way I described above. The main difference is that it does get
and convert the contents of the current VRAM frontbuffer into a texture before
compositing it with the new blitted data, rather than keeping the result of the
previous rendering into a texture.

Since the location of a surface is a bitmask,  it seems that in theory it
should be possible to simultaneously keep the frontbuffer's contents both in
system memory (for use by the ddraw application in case it locks it manually)
and in a texture (for use during the next rendering).