code: func RenderbufferStorage(target uint32, internalformat uint32, width int32, height int32) {
  	syscall.Syscall6(gpRenderbufferStorage, 4, uintptr(target), uintptr(internalformat), uintptr(width), uintptr(height), 0, 0)
  }
docs: // establish data storage, format and dimensions of a     renderbuffer object's image