code: func GetCompressedTextureSubImage(texture uint32, level int32, xoffset int32, yoffset int32, zoffset int32, width int32, height int32, depth int32, bufSize int32, pixels unsafe.Pointer) {
  	syscall.Syscall12(gpGetCompressedTextureSubImage, 10, uintptr(texture), uintptr(level), uintptr(xoffset), uintptr(yoffset), uintptr(zoffset), uintptr(width), uintptr(height), uintptr(depth), uintptr(bufSize), uintptr(pixels), 0, 0)
  }
docs: // retrieve a sub-region of a compressed texture image from a     compressed texture object