Added minimal fake size and respected the fake sizes in all fakeable functions.

lib/defaultSettings.js

@@ -4,6 +4,7 @@ var settings = {
 	whiteList: "",
 	blackList: "",
 	blockMode: "fakeReadout",
+	minFakeSize: 1,
 	maxFakeSize: 0,
 	rng: "nonPersistent",
 	persistentRndStorage: "",

lib/modifiedAPI.js

@@ -92,6 +92,18 @@
 		return imageData2;
 	}
 	
+	function canvasSizeShouldBeFaked(canvas, prefs){
+		if (canvas){
+			var size = canvas.height * canvas.width;
+			var maxSize = prefs("maxFakeSize") || Number.POSITIVE_INFINITY;
+			var minSize = prefs("minFakeSize") || 0;
+			return size > minSize & size <= maxSize;
+		}
+		else {
+			return true
+		}
+	}
+	
 	function hasType(status, type){
 		return status.type.indexOf(type) !== -1;
 	}
@@ -149,8 +161,13 @@
 			object: "HTMLCanvasElement",
 			fakeGenerator: function(prefs, notify, window, original){
 				return function toDataURL(){
-					notify.call(this, "fakedReadout");
-					return original.apply(getFakeCanvas(window, this), window.Array.from(arguments));
+					if (canvasSizeShouldBeFaked(this, prefs)){
+						notify.call(this, "fakedReadout");
+						return original.apply(getFakeCanvas(window, this), window.Array.from(arguments));
+					}
+					else {
+						return original.apply(this, window.Array.from(arguments));
+					}
 				};
 			}
 		},
@@ -170,8 +187,13 @@
 			object: "HTMLCanvasElement",
 			fakeGenerator: function(prefs, notify, window, original){
 				return function toBlob(callback){
-					notify.call(this, "fakedReadout");
-					return original.apply(getFakeCanvas(window, this), window.Array.from(arguments));
+					if (canvasSizeShouldBeFaked(this, prefs)){
+						notify.call(this, "fakedReadout");
+						return original.apply(getFakeCanvas(window, this), window.Array.from(arguments));
+					}
+					else {
+						return original.apply(this, window.Array.from(arguments));
+					}
 				};
 			},
 			exportOptions: {allowCallbacks: true}
@@ -192,8 +214,13 @@
 			object: "HTMLCanvasElement",
 			fakeGenerator: function(prefs, notify, window, original){
 				return function mozGetAsFile(callback){
-					notify.call(this, "fakedReadout");
-					return original.apply(getFakeCanvas(window, this), window.Array.from(arguments));
+					if (canvasSizeShouldBeFaked(this, prefs)){
+						notify.call(this, "fakedReadout");
+						return original.apply(getFakeCanvas(window, this), window.Array.from(arguments));
+					}
+					else {
+						return original.apply(this, window.Array.from(arguments));
+					}
 				};
 			}
 		},
@@ -212,12 +239,8 @@
 			},
 			object: "CanvasRenderingContext2D",
 			fakeGenerator: function(prefs, notify, window, original){
-				var maxSize = prefs("maxFakeSize") || Number.POSITIVE_INFINITY;
 				return function getImageData(sx, sy, sw, sh){
-					if (sw * sh > maxSize){
-						return original.apply(this, window.Array.from(arguments));
-					}
-					else {
+					if (!this || canvasSizeShouldBeFaked(this.canvas, prefs)){
 						notify.call(this, "fakedReadout");
 						var fakeCanvas;
 						var context = this;
@@ -232,6 +255,9 @@
 						}
 						return original.apply(context, window.Array.from(arguments));
 					}
+					else {
+						return original.apply(this, window.Array.from(arguments));
+					}
 				};
 			}
 		},
@@ -245,18 +271,23 @@
 			object: "CanvasRenderingContext2D",
 			fakeGenerator: function(prefs, notify, window, original){
 				return function fillText(str, x, y){
-					notify.call(this, "fakedInput");
-					var oldImageData;
-					try {
-						// "this" is not trustable - it may be not a context
-						oldImageData = getImageData(window, this).imageData;
+					if (!this || canvasSizeShouldBeFaked(this.canvas, prefs)){
+						notify.call(this, "fakedInput");
+						var oldImageData;
+						try {
+							// "this" is not trustable - it may be not a context
+							oldImageData = getImageData(window, this).imageData;
+						}
+						catch (e){}
+						// if "this" is not a correct context the next line will throw an error
+						var ret = original.apply(this, window.Array.from(arguments));
+						var newImageData = getImageData(window, this).imageData;
+						this.putImageData(randomMixImageData(window, oldImageData, newImageData), 0, 0);
+						return ret;
+					}
+					else {
+						return original.apply(this, window.Array.from(arguments));
 					}
-					catch (e){}
-					// if "this" is not a correct context the next line will throw an error
-					var ret = original.apply(this, window.Array.from(arguments));
-					var newImageData = getImageData(window, this).imageData;
-					this.putImageData(randomMixImageData(window, oldImageData, newImageData), 0, 0);
-					return ret;
 				};
 			}
 		},
@@ -270,18 +301,23 @@
 			object: "CanvasRenderingContext2D",
 			fakeGenerator: function(prefs, notify, window, original){
 				return function strokeText(str, x, y){
-					notify.call(this, "fakedInput");
-					var oldImageData;
-					try {
-						// "this" is not trustable - it may be not a context
-						oldImageData = getImageData(window, this).imageData;
+					if (!this || canvasSizeShouldBeFaked(this.canvas, prefs)){
+						notify.call(this, "fakedInput");
+						var oldImageData;
+						try {
+							// "this" is not trustable - it may be not a context
+							oldImageData = getImageData(window, this).imageData;
+						}
+						catch (e){}
+						// if "this" is not a correct context the next line will throw an error
+						var ret = original.apply(this, window.Array.from(arguments));
+						var newImageData = getImageData(window, this).imageData;
+						this.putImageData(randomMixImageData(window, oldImageData, newImageData), 0, 0);
+						return ret;
+					}
+					else {
+						return original.apply(this, window.Array.from(arguments));
 					}
-					catch (e){}
-					// if "this" is not a correct context the next line will throw an error
-					var ret = original.apply(this, window.Array.from(arguments));
-					var newImageData = getImageData(window, this).imageData;
-					this.putImageData(randomMixImageData(window, oldImageData, newImageData), 0, 0);
-					return ret;
 				};
 			}
 		},
@@ -295,18 +331,23 @@
 			object: ["WebGLRenderingContext", "WebGL2RenderingContext"],
 			fakeGenerator: function(prefs, notify, window, original){
 				return function readPixels(x, y, width, height, format, type, pixels){
-					// not able to use the getFakeCanvas function because the context type is wrong...
-					notify.call(this, "fakedReadout");
-					var xPixels = pixels;
-					var ret = original.apply(this, window.Array.from(arguments));
-					var l = xPixels.length;
-					var rng = randomSupply.getRng(l, window);
-					
-					for (var i = 0; i < l; i += 1){
-						xPixels[i] = rng(xPixels[i], i);
+					if (!this || canvasSizeShouldBeFaked(this.canvas, prefs)){
+						// not able to use the getFakeCanvas function because the context type is wrong...
+						notify.call(this, "fakedReadout");
+						var xPixels = pixels;
+						var ret = original.apply(this, window.Array.from(arguments));
+						var l = xPixels.length;
+						var rng = randomSupply.getRng(l, window);
+						
+						for (var i = 0; i < l; i += 1){
+							xPixels[i] = rng(xPixels[i], i);
+						}
+						
+						return ret;
+					}
+					else {
+						return original.apply(this, window.Array.from(arguments));
 					}
-					
-					return ret;
 				};
 			}
 		}