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@@ -481,9 +481,9 @@ if (typeof PDFJS === 'undefined') {
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}
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})();
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-// TODO CanvasPixelArray is deprecated; use Uint8ClampedArray
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-// once it's supported.
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+// Support: IE<11, Chrome<21
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(function checkSetPresenceInImageData() {
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+ // IE < 11 will use window.CanvasPixelArray which lacks set function.
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if (window.CanvasPixelArray) {
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if (typeof window.CanvasPixelArray.prototype.set !== 'function') {
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window.CanvasPixelArray.prototype.set = function(arr) {
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@@ -492,6 +492,25 @@ if (typeof PDFJS === 'undefined') {
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}
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};
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}
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+ } else {
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+ // Chrome < 21 uses an inaccessible CanvasPixelArray prototype.
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+ // Because we cannot feature detect it, we rely on user agent.
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+ if (navigator.userAgent.indexOf('Chrom') >= 0) {
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+ var versionMatch = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
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+ if (versionMatch && parseInt(versionMatch[2]) < 21) {
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+ var contextPrototype = window.CanvasRenderingContext2D.prototype;
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+ contextPrototype._createImageData = contextPrototype.createImageData;
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+ contextPrototype.createImageData = function(w, h) {
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+ var imageData = this._createImageData(w, h);
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+ imageData.data.set = function(arr) {
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+ for (var i = 0, ii = this.length; i < ii; i++) {
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+ this[i] = arr[i];
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+ }
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+ };
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+ return imageData;
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+ };
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+ }
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+ }
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}
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})();
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