[Bug 11681] Add support for video overlay

http://bugs.winehq.org/show_bug.cgi?id=11681

--- Comment #6 from Roderick Colenbrander   2008-04-04 02:50:25 ---
To give an idea all multimedia players use overlays when available it results
in better performance as an overlay engine of the gpu (or a shader engine) can
do the scaling and yuv conversion. I wouldn't be surprised if plugins like
flash wouldn't use it either.

I think the code from the picasa branch can for a large part be reused. The
main thing that is wrong with it is that it uses ExtEscape to access
winex11.drv. I think it would be fine by AJ if we routed it in a similar way as
opengl32 through gdi32.dll.