[android-developers] 'share_context' parameter of eglCreateContext()

While creating a GLES context for off-screen rendering using
eglCreateContext(), if I set the third parameter ('share_context') to
the window context that's used for ordinary rendering to the screen to
avoid having to upload textures etc. to the new context I get
BAD_MATCH.

EGL spec says BAD_MATCH may be generated by eglCreateContext() if GLES
server context state for all sharing contexts does not exist in a
single address space. I don't know how to verify this - I believe the
contexts in my case (the window context created by GLSurfaceView and
the other by my code) should meet the requirement, however I'm still
getting BAD_MATCH.

Could someone help me out with this? Not having to upload everything
to the newly created off-screen context would be a performance boon...

Thanks!

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