Class holding a valid drawing 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 sf.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.

Usage example:

void threadFunction()
{
   sf.Context context;
   // from now on, you have a valid context
 
   // you can make OpenGL calls
   glClear(GL_DEPTH_BUFFER_BIT);
}
// the context is automatically deactivated and destroyed
// by the sf.Context destructor