Reference Manual glGetPointerv Subroutine Purpose Returns the address of the specified pointer. The glGetPointerv subroutine returns pointer information. The pname parameter is a symbolic constant indicating the pointer to be returned, and params is a pointer to a location in which to place the returned data.
Parameters pname Specifies the array or buffer pointer to be returned.
The glGetPointerv subroutine is available only if the GL version is 1.1 or greater. The pointers are all client side state. The initial value for each pointer is 0.