security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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Code Releases Activity

Disabled faking in getImageData for bigger areas.

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This commit is contained in:
kkapsner 2016-04-21 23:54:48 +02:00
parent 535a72ab62
commit 4465ff8435
1 changed files with 7 additions and 2 deletions
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9
lib/modifiedAPI.js
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@ -85,7 +85,7 @@
mozGetAsFile: { mozGetAsFile: {
type: "readout", type: "readout",
object: "HTMLCanvasElement", object: "HTMLCanvasElement",
mozGetAsFile: function mozGetAsFile(callbak){ mozGetAsFile: function mozGetAsFile(callback){
var window = getWindow(this); var window = getWindow(this);
return window.HTMLCanvasElement.prototype.mozGetAsFile.apply(getFakeCanvas(window, this), arguments); return window.HTMLCanvasElement.prototype.mozGetAsFile.apply(getFakeCanvas(window, this), arguments);
} }
@ -95,7 +95,12 @@
object: "CanvasRenderingContext2D", object: "CanvasRenderingContext2D",
fake: function getImageData(sx, sy, sw, sh){ fake: function getImageData(sx, sy, sw, sh){
var window = getWindow(this.canvas); var window = getWindow(this.canvas);
var context = window.HTMLCanvasElement.prototype.getContext.call(getFakeCanvas(window, this.canvas), "2d"); var context = (sw * sh > 300 * 400)?
this:
window.HTMLCanvasElement.prototype.getContext.call(
getFakeCanvas(window, this.canvas),
"2d"
);
var data = window.CanvasRenderingContext2D.prototype.getImageData.apply(context, arguments).data; var data = window.CanvasRenderingContext2D.prototype.getImageData.apply(context, arguments).data;
var imageData = new window.wrappedJSObject.ImageData(sw, sh); var imageData = new window.wrappedJSObject.ImageData(sw, sh);