[5/5] WineD3D: Implement buffer subrange mapping with GL_APPLE_flush_buffer_range

[Henri Verbeet]

2009/12/16 Stefan Dösinger <stefan at codeweavers.com>:
> Actually, since we're not going to Unmap-flush and PreLoad() the buffer(its either-or), I can use the same data structure for the stack and list(or well, dynamic array). I just have to watch out not to remove elements in any place in unlock that affects DOUBLEBUFFER buffers.
>
Sounds fragile, but I'm willing to wait and see what the final patch looks like.

> Here is what I have so far. Completely untested, and the flushing is not yet integrated.
>
Yeah, it has some issues :-)

For what it's worth, I think I prefer offset/size over start/len, but
I guess that's completely subjective.