private boolean isNonStraightAngleRotated() {
    return mBoundsPoints[0] != mBoundsPoints[6] && mBoundsPoints[1] != mBoundsPoints[7];
  }
Is the cropping image has been rotated by NOT 0,90,180 or 270 degrees.
core/src/main/java/com/theartofdev/edmodo/cropper/CropOverlayView.java