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prototype.load = function () {
var _this = this,
options = this.options,
$this = this.$element,
crossOrigin = '',
buildEvent,
$clone,
url;
if ($this.is('img')) {
url = $this.prop('src');
} else if ($this.is('canvas') && support.canvas) {
url = $this[0].toDataURL();
}
if (!url) {
return;
}
buildEvent = $.Event(EVENT_BUILD);
$this.one(EVENT_BUILD, options.build).trigger(buildEvent); // Only trigger once
if (buildEvent.isDefaultPrevented()) {
return;
}
if (options.checkImageOrigin && isCrossOriginURL(url)) {
crossOrigin = ' crossOrigin'; // crossOrigin="anonymous"
if (!$this.prop('crossOrigin')) { // Only when there was not a "crossOrigin" property
url = addTimestamp(url); // Bust cache (#148)
}
}
this.$clone = ($clone = $('<img' + crossOrigin + ' src="' + url + '">'));
$clone.one('load', function () {
var naturalWidth = this.naturalWidth || $clone.width(),
naturalHeight = this.naturalHeight || $clone.height();
_this.image = {
naturalWidth: naturalWidth,
naturalHeight: naturalHeight,
aspectRatio: naturalWidth / naturalHeight,
rotate: 0
};
_this.url = url;
_this.ready = true;
_this.build();
});
// Hide and insert into the document
$clone.addClass(CLASS_HIDE).insertAfter($this);
};