https://www.khronos.org/registry/gles/extensions/OES/OES_mapbuffer.txt
This extension adds to the vertex buffer object functionality supported
by OpenGL ES 1.1 or ES 2.0 by allowing the entire data storage of a
buffer object to be mapped into the client's address space.
So this only a
it did not work.
off screen rendering might be a walkaround, but would it work for pixel buffer
surface?
thanks.
hilbert___
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