How to read binary data in IE9?

Question

I'm working on some Javascript code that creates an alpha mask of a image using paths embedded by Photoshop. The onload handler of a IMG tag would call a clip(this). The function load the image's source file and scans through it. Here's the setup:

function clip(img) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', img.src, true);
    xhr.responseType = 'arraybuffer';
    xhr.target = img;

    xhr.onload = function(e) {
        var bytes = new Uint8Array(this.response);
        var p = findPhotoshopSegment(bytes);
        if(p) {
            var paths = parse8BIMData(bytes, p);

            /* ... replaces IMG with SVG tag ... */
        }
    };
    xhr.send();
}

You can see the code in action at http://flaczki.net46.net/JPEG/SVG.html

Currently, it only works in Firefox, Chrome, and Safari. It doesn't work in IE9. The browser supports SVG but not Uint8Array. Is there some kind of workaround?

How to read binary data in IE9?

2 Answers