[PATCH 0/7] MR8210: win32u: Use a pbuffer instead of OSmesa for memory DCs GL.

[Rémi Bernon (＠rbernon)]

OSmesa is deprecated and has been removed from latest mesa releases, this replaces it with pbuffer rendering and flushing of the surface onto the bitmap at some specific sync points. The tests show that this is roughly how Windows seem to behave anyway, instead of rendering directly to the memory as OSmesa does.