class context :
If you need to make OpenGL calls without having an active window (like in a thread), you can use an instance of this class to get a valid context.
Having a valid context is necessary for *every* OpenGL call.
Note that a context is only active in its current thread, if you create a new thread it will have no valid context by default.
To use a context instance, just construct it and let it live as long as you need a valid context. No explicit activation is needed, all it has to do is to exist. Its destructor will take care of deactivating and freeing all the attached resources.
let thread_func () =
let context = new context in
(* from now on, you have a valid context *)
(* you can make OpenGL calls *)
(* Destruction is not automated *)
method destroy :
method set_active :
bool -> bool