Introduced maxFakeSize.

data/frame.js

@@ -34,17 +34,18 @@
 					token
 				)[0];
 			},
-			prefs: function(name){
-				return sendSyncMessage(
-					"canvasBlocker-pref-get",
-					name
-				)[0];
-			}
+			prefs
 		});
 	}
 	function notify(data){
 		sendAsyncMessage("canvasBlocker-notify", data);
 	}
+	function prefs(name){
+		return sendSyncMessage(
+			"canvasBlocker-pref-get",
+			name
+		)[0];
+	}
 	
 	function interceptWrapper(ev){
 		if (enabled){
@@ -55,7 +56,7 @@
 			var window = ev.target.defaultView;
 			intercept(
 				{subject: window},
-				{check, ask: askWrapper, notify}
+				{check, ask: askWrapper, notify, prefs}
 			);
 		}
 	}

lib/intercept.js

@@ -9,7 +9,7 @@
 	var apiNames = Object.keys(changedFunctions);
 	var undef;
 	
-	exports.intercept = function intercept({subject: window}, {check, ask, notify}){
+	exports.intercept = function intercept({subject: window}, {check, ask, notify, prefs}){
 		apiNames.forEach(function(name){
 			var changedFunction = changedFunctions[name];
 			var original = window.wrappedJSObject[changedFunction.object].prototype[name];
@@ -35,7 +35,7 @@
 									return original;
 								case "fake":
 									notify({url: window.location.href, errorStack: error.stack}, window);
-									return changedFunction.fake || undef;
+									return changedFunction.fake || changedFunction.fakeGenerator(prefs) || undef;
 								//case "block":
 								default:
 									return undef;

lib/modifiedAPI.js

@@ -93,21 +93,24 @@
 		getImageData: {
 			type: "readout",
 			object: "CanvasRenderingContext2D",
-			fake: function getImageData(sx, sy, sw, sh){
-				var window = getWindow(this.canvas);
-				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);
-				for (var i = 0, l = data.length; i < l; i += 1){
-					imageData.data[i] = data[i];
+			fakeGenerator: function(prefs){
+				var maxSize = prefs("maxFakeSize") || Number.POSITIVE_INFINITY;
+				return function getImageData(sx, sy, sw, sh){
+					var window = getWindow(this.canvas);
+					var context = (sw * sh > maxSize)?
+						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);
+					for (var i = 0, l = data.length; i < l; i += 1){
+						imageData.data[i] = data[i];
+					}
+					return imageData;
 				}
-				return imageData;
 			}
 		},
 		readPixels: {

locale/de-DE.json

@@ -21,6 +21,8 @@
  "blockMode_options.block readout API": "Auslese-API blockieren", 
  "blockMode_options.fake readout API": "Auslese-API vortäuschen", 
  "blockMode_title": "Blockiermodus", 
+ "maxFakeSize_description": "Maximale Vortäuschgröße", 
+ "maxFakeSize_": "Canvas, die eine größe Fläche als die hier angegeben Zahl haben, werden nicht vorgetäuscht. (Null eingeben, um es zu deaktivieren.)", 
  "disableNotifications": "Benachrichtigungen deaktivieren", 
  "displayCallingStack": "Aufrufestack anzeigen", 
  "displayFullURL": "URL anzeigen", 

locale/en-US.json

@@ -21,6 +21,8 @@
  "blockMode_options.block readout API": "block readout API", 
  "blockMode_options.fake readout API": "fake readout API", 
  "blockMode_title": "Block mode", 
+ "maxFakeSize_description": "Maximal fake size", 
+ "maxFakeSize_": "Canvas with a bigger area than this number will not be faked. (Enter zero to disable.)", 
  "disableNotifications": "disable notifications", 
  "displayCallingStack": "display calling stack", 
  "displayFullURL": "display full URL", 

package.json

@@ -62,6 +62,12 @@
 				}
 			]
 		},
+		{
+			"name": "maxFakeSize",
+			"title": "Maximal fake size",
+			"type": "integer",
+			"value": 0
+		},
 		{
 			"name": "askOnlyOnce",
 			"title": "Ask only once",