|
@@ -481,7 +481,7 @@ if (typeof PDFJS === 'undefined') {
|
|
|
}
|
|
|
})();
|
|
|
|
|
|
-// Support: IE<11, Chrome<21
|
|
|
+// Support: IE<11, Chrome<21, Android<4.4
|
|
|
(function checkSetPresenceInImageData() {
|
|
|
// IE < 11 will use window.CanvasPixelArray which lacks set function.
|
|
|
if (window.CanvasPixelArray) {
|
|
@@ -493,24 +493,38 @@ if (typeof PDFJS === 'undefined') {
|
|
|
};
|
|
|
}
|
|
|
} else {
|
|
|
- // Chrome < 21 uses an inaccessible CanvasPixelArray prototype.
|
|
|
- // Because we cannot feature detect it, we rely on user agent.
|
|
|
+ // Old Chrome and Android use an inaccessible CanvasPixelArray prototype.
|
|
|
+ // Because we cannot feature detect it, we rely on user agent parsing.
|
|
|
+ var polyfill = false;
|
|
|
if (navigator.userAgent.indexOf('Chrom') >= 0) {
|
|
|
var versionMatch = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
|
|
|
if (versionMatch && parseInt(versionMatch[2]) < 21) {
|
|
|
- var contextPrototype = window.CanvasRenderingContext2D.prototype;
|
|
|
- contextPrototype._createImageData = contextPrototype.createImageData;
|
|
|
- contextPrototype.createImageData = function(w, h) {
|
|
|
- var imageData = this._createImageData(w, h);
|
|
|
- imageData.data.set = function(arr) {
|
|
|
- for (var i = 0, ii = this.length; i < ii; i++) {
|
|
|
- this[i] = arr[i];
|
|
|
- }
|
|
|
- };
|
|
|
- return imageData;
|
|
|
- };
|
|
|
+ // Chrome < 21 lacks the set function.
|
|
|
+ polyfill = true;
|
|
|
+ }
|
|
|
+ } else if (navigator.userAgent.indexOf('Android') >= 0) {
|
|
|
+ // Android < 4.4 lacks the set function.
|
|
|
+ // Android >= 4.4 will contain Chrome in the user agent,
|
|
|
+ // thus pass the Chrome check above and not reach this block.
|
|
|
+ var isOldAndroid = /Android\s[0-4][^\d]/g.test(navigator.userAgent);
|
|
|
+ if (isOldAndroid) {
|
|
|
+ polyfill = true;
|
|
|
}
|
|
|
}
|
|
|
+
|
|
|
+ if (polyfill) {
|
|
|
+ var contextPrototype = window.CanvasRenderingContext2D.prototype;
|
|
|
+ contextPrototype._createImageData = contextPrototype.createImageData;
|
|
|
+ contextPrototype.createImageData = function(w, h) {
|
|
|
+ var imageData = this._createImageData(w, h);
|
|
|
+ imageData.data.set = function(arr) {
|
|
|
+ for (var i = 0, ii = this.length; i < ii; i++) {
|
|
|
+ this[i] = arr[i];
|
|
|
+ }
|
|
|
+ };
|
|
|
+ return imageData;
|
|
|
+ };
|
|
|
+ }
|
|
|
}
|
|
|
})();
|
|
|
|