I have a pthread which is rendering a small set of quads with a small
set of textures.
I want to create another context which shares the same resources and
then upload new textures using the 2nd context in the main application
thread without stopping the rendering thread.
Since I am using 2 separate contexts, will this work? I don't plan to
delete any textures in the main application thread, just add new ones.
Then I will create my new rendering array data in the main application
thread and lock the mutex I use to stall the rendering thread, swap the
rendering data, and unlock the mutex to let the rendering continue.
I know I can't do this with a single context because I'd have to access
it from two threads at the same time.
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