[SDL] OS X can't display offset YUV overlays?

[Gerry JJ]

Hi.  We've got a game that needs to be able to display YUV overlays for
playing movies at variable offsets within the SDL window.  This works
fine in Windows and Linux, but the OS X version of the game fails to
display YUV overlays in windowed mode if the offset is anything else
than (0, 0).  There's actually a test for this in SDL's OS X code which
returns failure in these cases, so it seems to be intentional.  Why is
this, and is there any chance it could get fixed?

- Gerry