OpenGL not show result from secondary thread on iPhone

I created EAGLContext and use it in开发者_如何学编程 the secondary thread. But there is no output displayed. The same code works fine if run in main loop.

Do I need to notify somewhere on each render completion?

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EGL Context may be only active in one thread. You need to use eglMakeCurrent(). Also, you need to use eglSwapBuffers() once your rendering is done.