/*!
{
  "name": "EXIF Orientation",
  "property": "exiforientation",
  "tags": ["image"],
  "builderAliases": ["exif_orientation"],
  "async": true,
  "authors": ["Paul Sayre"],
  "notes": [{
    "name": "Article by Dave Perrett",
    "href": "https://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/"
  }, {
    "name": "Article by Calvin Hass",
    "href": "https://www.impulseadventure.com/photo/exif-orientation.html"
  }]
}
!*/
/* DOC
Detects support for EXIF Orientation in JPEG images.

iOS looks at the EXIF Orientation flag in JPEGs and rotates the image accordingly. Most desktop browsers just ignore this data.
*/
define(['Modernizr', 'addTest'], function(Modernizr, addTest) {
  // Bug trackers:
  //    bugzil.la/298619 (unimplemented)
  //    crbug.com/56845 (looks incomplete)
  //    webk.it/19688 (available upstream but its up all ports to turn on individually)
  Modernizr.addAsyncTest(function() {
    var img = new Image();

    img.onerror = function() {
      addTest('exiforientation', false, {aliases: ['exif-orientation']});
    };

    img.onload = function() {
      addTest('exiforientation', img.width !== 2, {aliases: ['exif-orientation']});
    };

    // There may be a way to shrink this more, it's a 1x2 white jpg with the orientation flag set to 6
    img.src = 'data:image/jpeg;base64,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';
  });
});
