extension UIImageOrientation {
    var tiffEquivalent: Int32 {
        switch (self) {
        case .up: return 1
        case .down: return 3
        case .left: return 8
        case .right: return 6
        case .upMirrored: return 2
        case .downMirrored: return 4
        case .leftMirrored: return 5
        case .rightMirrored: return 7
        }
    }
}