Gets a pointer to a given GL or GL ES extension function.
This acts as a wrapper around glXGetProcAddress or whatever is the appropriate function for the current backend.
<note>This function should not be used to query core opengl API symbols since eglGetProcAddress for example doesn't allow this and and may return a junk pointer if you do.</note>
| name |
the name of the function. |
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a pointer to the requested function or null if the function is not available. |