opengl32: make the old code before the "sync the dibsection to its pixmap" patch be selectable at runtime

[Stefan Dösinger]

Am Montag, 20. März 2006 23:26 schrieb Lionel Ulmer:
> Well, in OpenGL each thread can have its own context (and you can also bind
> a context to only one thread which explains why multi-threaded D3D
> applications are such a pain to support). So you can have multi-threaded GL
> applications with each thread having its own GL context.
What says that a gl context can be used by one thread only? In the 
glxDestroyContext man page it sounds like a context has a sort of reference 
count, and it can be used by multiple threads.

A little bit OT, but related to multi-threaded opengl is a bug in the dri 
radeon driver(https://bugs.freedesktop.org/show_bug.cgi?id=6240). I've 
reported it to the dri devs but didn't get any response so far.

Stefan
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