code: func CopyNamedBufferSubData(readBuffer uint32, writeBuffer uint32, readOffset int, writeOffset int, size int) {
  	syscall.Syscall6(gpCopyNamedBufferSubData, 5, uintptr(readBuffer), uintptr(writeBuffer), uintptr(readOffset), uintptr(writeOffset), uintptr(size), 0)
  }
docs: // copy all or part of the data store of a buffer object to the data store of another buffer object