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33 lines
1.7 KiB
33 lines
1.7 KiB
7 years ago
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// EXIF Orientation test
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// iOS looks at the EXIF Orientation flag in jpgs and rotates the image
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// accordingly. Looks like most desktop browsers just ignore this data.
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// description: www.impulseadventure.com/photo/exif-orientation.html
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// Bug trackers:
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// bugzil.la/298619 (unimplemented)
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// crbug.com/56845 (looks incomplete)
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// webk.it/19688 (available upstream but its up all ports to turn on individually)
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//
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// detect by Paul Sayre
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(function(){
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var img = new Image();
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img.onerror = function() {
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Modernizr.addTest('exif-orientation', function () { return false; });
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};
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img.onload = function() {
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Modernizr.addTest('exif-orientation', function () { return img.width !== 2; });
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};
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// There may be a way to shrink this more, it's a 1x2 white jpg with the orientation flag set to 6
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img.src = "data:image/jpeg;base64,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";
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})();
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