Sakurai/pdf.js
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Remove the ImageData.set polyfill

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This is only relevant for browsers that we don't intend to support with PDF.js version `2.0`.
This commit is contained in:
Jonas Jenwald 2017-12-19 14:57:08 +01:00
parent 363e517acf
commit cf88b7b212
1 changed files with 0 additions and 54 deletions
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54
src/shared/compatibility.js
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@ -25,8 +25,6 @@ var globalScope = require('./global_scope');
var userAgent = (typeof navigator !== 'undefined' && navigator.userAgent) || '';
var isAndroid = /Android/.test(userAgent);
var isAndroidPre5 = /Android\s[0-4][^\d]/.test(userAgent);
var isChrome = userAgent.indexOf('Chrom') >= 0;
var isIOSChrome = userAgent.indexOf('CriOS') >= 0;
var isIE = userAgent.indexOf('Trident') >= 0;
var isIOS = /\b(iPad|iPhone|iPod)(?=;)/.test(userAgent);
@ -75,58 +73,6 @@ PDFJS.compatibilityChecked = true;
}
})();
// Support: IE<11, Chrome<21, Android<4.4, Safari<6
(function checkSetPresenceInImageData() {
if (!hasDOM) {
return;
}
// IE < 11 will use window.CanvasPixelArray which lacks set function.
if (window.CanvasPixelArray) {
if (typeof window.CanvasPixelArray.prototype.set !== 'function') {
window.CanvasPixelArray.prototype.set = function(arr) {
for (var i = 0, ii = this.length; i < ii; i++) {
this[i] = arr[i];
}
};
}
} else {
// Old Chrome and Android use an inaccessible CanvasPixelArray prototype.
// Because we cannot feature detect it, we rely on user agent parsing.
var polyfill = false, versionMatch;
if (isChrome) {
versionMatch = userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
// Chrome < 21 lacks the set function.
polyfill = versionMatch && parseInt(versionMatch[2]) < 21;
} else if (isAndroid) {
// 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.
polyfill = isAndroidPre5;
} else if (isSafari) {
versionMatch = userAgent.
match(/Version\/([0-9]+)\.([0-9]+)\.([0-9]+) Safari\//);
// Safari < 6 lacks the set function.
polyfill = versionMatch && parseInt(versionMatch[1]) < 6;
}
if (polyfill) {
var contextPrototype = window.CanvasRenderingContext2D.prototype;
var createImageData = contextPrototype.createImageData;
contextPrototype.createImageData = function(w, h) {
var imageData = createImageData.call(this, w, h);
imageData.data.set = function(arr) {
for (var i = 0, ii = this.length; i < ii; i++) {
this[i] = arr[i];
}
};
return imageData;
};
// this closure will be kept referenced, so clear its vars
contextPrototype = null;
}
}
})();
// Support: Android, iOS
(function checkCanvasSizeLimitation() {
if (isIOS || isAndroid) {