code: func fixOrientation(img image.Image, o orientation) image.Image {
  	switch o {
  	case orientationNormal:
  	case orientationFlipH:
  		img = FlipH(img)
  	case orientationFlipV:
  		img = FlipV(img)
  	case orientationRotate90:
  		img = Rotate90(img)
  	case orientationRotate180:
  		img = Rotate180(img)
  	case orientationRotate270:
  		img = Rotate270(img)
  	case orientationTranspose:
  		img = Transpose(img)
  	case orientationTransverse:
  		img = Transverse(img)
  	}
  	return img
  }
docs: // fixOrientation applies a transform to img corresponding to the given orientation flag.