code: func CopyTextureSubImage3D(texture uint32, level int32, xoffset int32, yoffset int32, zoffset int32, x int32, y int32, width int32, height int32) {
  	syscall.Syscall9(gpCopyTextureSubImage3D, 9, uintptr(texture), uintptr(level), uintptr(xoffset), uintptr(yoffset), uintptr(zoffset), uintptr(x), uintptr(y), uintptr(width), uintptr(height))
  }
docs: // copy a three-dimensional texture subimage