code: func GetImgSize(imgPath string) (int, int) {
  	bitmap := OpenBitmap(imgPath)
  	gbit := ToBitmap(bitmap)
  
  	w := gbit.Width / 2
  	h := gbit.Height / 2
  	FreeBitmap(bitmap)
  
  	return w, h
  }
docs: // GetImgSize get the image size