Whether a number is one of the eight orientations.
Files do carry values outside the range, and a reader that trusts one shows the picture turned some way nobody chose, so anything unknown is better treated as the default.
the number read from a file
Whether a number is one of the eight orientations.
Files do carry values outside the range, and a reader that trusts one shows the picture turned some way nobody chose, so anything unknown is better treated as the default.