Function requiresCanvasOrientation

js/load-image-orientation.js:113–125

* Determines if the orientation requires a canvas element. * * @param {object} [options] Options object * @param {boolean} [withMetaData] Is metadata required for orientation * @returns {boolean} Returns true if orientation requires canvas/meta

(options, withMetaData)

   * @returns {boolean} Returns true if orientation requires canvas/meta
   */
  function requiresCanvasOrientation(options, withMetaData) {
    var orientation = options && options.orientation
    return (
      // Exif orientation for browsers without automatic image orientation:
      (orientation === true && !loadImage.orientation) ||
      // Orientation reset for browsers with automatic image orientation:
      (orientation === 1 && loadImage.orientation) ||
      // Orientation to defined value, requires meta for orientation reset only:
      ((!withMetaData || loadImage.orientation) &&
        orientation > 1 &&
        orientation < 9)
    )
  }

  /**
   * Determines if the image requires an orientation change.