[mono-android] Can't detach AndroidGraphicsContext from current thead and attach to another

[chris@Terrago]

I am attempting to separate the OpenTK rendering for my view onto a separate
thread. After doing some research into this I found that there are two
methods for this recommended on the OpenTK site

1. Create a separate graphics context for each thread
2. Share a single graphics context between threads by using MakeCurrent to
detach and attach it

I have tried both methods and continuously get InvalidOperation exceptions
on EGLMakeCurrent when trying to attach the AndroidGraphicsContext to the
new thread. It also appears that when I attempt method #2 above and use
GraphicsContext.MakeCurrent(null) to detach from the current thread the
IsCurrent property on AndroidGraphicsContext remains true, further on the
next call to AndroidGameView.MakeCurrent I get an InvalidOperation exception
since, it appears, the graphics context was never released.

Should it be possible to share AndroidGraphicsContext between threads as you
can an OpenTK GraphicsContext object? Is this possibly something that is
getting addressed in the upcoming 4.0.5 release? Or, am I just missing
something?

Thanks,
Chris

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