From 4465ff8435dca04c741ccf85aeaef86cf03351b5 Mon Sep 17 00:00:00 2001
From: kkapsner <github@mail.kkapsner.de>
Date: Thu, 21 Apr 2016 23:54:48 +0200
Subject: [PATCH] Disabled faking in getImageData for bigger areas.

---
 lib/modifiedAPI.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/modifiedAPI.js b/lib/modifiedAPI.js
index 455661a..bf19f28 100644
--- a/lib/modifiedAPI.js
+++ b/lib/modifiedAPI.js
@@ -85,7 +85,7 @@
 		mozGetAsFile: {
 			type: "readout",
 			object: "HTMLCanvasElement",
-			mozGetAsFile: function mozGetAsFile(callbak){
+			mozGetAsFile: function mozGetAsFile(callback){
 				var window = getWindow(this);
 				return window.HTMLCanvasElement.prototype.mozGetAsFile.apply(getFakeCanvas(window, this), arguments);
 			}
@@ -95,7 +95,12 @@
 			object: "CanvasRenderingContext2D",
 			fake: function getImageData(sx, sy, sw, sh){
 				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 imageData = new window.wrappedJSObject.ImageData(sw, sh);