diff --git a/src/game-lib-a-2-utils.js b/src/game-lib-a-2-utils.js
index 2d6b6e9..3af61c7 100644
--- a/src/game-lib-a-2-utils.js
+++ b/src/game-lib-a-2-utils.js
@@ -131,6 +131,21 @@ GameLib.Utils.ObjectPropertiesAsBoolean = function(object) {
     );
 };
 
+GameLib.Utils.GetRuntime = function() {
+
+    var result = null;
+
+    GameLib.Event.Emit(
+        GameLib.Event.GET_RUNTIME,
+        null,
+        function(runtime) {
+            result = runtime;
+        }
+    );
+
+    return result;
+};
+
 /**
  * Returns the window size or null
  * @returns {*}
diff --git a/src/game-lib-image.js b/src/game-lib-image.js
index 24234c3..615492e 100644
--- a/src/game-lib-image.js
+++ b/src/game-lib-image.js
@@ -149,6 +149,21 @@ GameLib.Image.prototype.updateFromInstance = function() {
     this.height         = this.instance.height || 0;
 };
 
+GameLib.Image.prototype.getPixelData = function() {
+
+    var canvas = document.createElement( 'canvas' );
+    canvas.width    = this.width;
+    canvas.height   = this.height;
+    var context = canvas.getContext( '2d' );
+
+    context.drawImage(this.instance, 0, 0, canvas.width, canvas.height);
+
+    var imageData   = context.getImageData(0, 0, this.width, this.height);
+    var pixels      = imageData.data;
+
+    return pixels;
+};
+
 /**
  * Returns an array of Height Data for this image
  * @returns {Float32Array | null}
@@ -160,15 +175,7 @@ GameLib.Image.prototype.getHeightData = function() {
         return null;
     }
 
-    var canvas = document.createElement( 'canvas' );
-    canvas.width    = this.width;
-    canvas.height   = this.height;
-    var context = canvas.getContext( '2d' );
-
-    context.drawImage(this.instance, 0, 0, canvas.width, canvas.height);
-
-    var imageData   = context.getImageData(0, 0, this.width, this.height);
-    var pixels      = imageData.data;
+    var pixels = this.getPixelData();
 
     var data = new Float32Array( this.width * this.height );
 
diff --git a/src/game-lib-renderer-a.js b/src/game-lib-renderer-a.js
index 1466100..20e487f 100644
--- a/src/game-lib-renderer-a.js
+++ b/src/game-lib-renderer-a.js
@@ -150,3 +150,7 @@ GameLib.Renderer.prototype.toApiObject = function() {
 
     return apiRenderer;
 };
+
+GameLib.Renderer.prototype.setSize = function(width, height) {
+    console.warn('please implement me in child class');
+};
diff --git a/src/game-lib-renderer-d2.js b/src/game-lib-renderer-d2.js
index 79b7533..955b3fe 100644
--- a/src/game-lib-renderer-d2.js
+++ b/src/game-lib-renderer-d2.js
@@ -85,3 +85,10 @@ GameLib.Renderer.D2.prototype.toApiObject = function() {
 
     return apiRendererD2;
 };
+
+/**
+ * set size
+ */
+GameLib.Renderer.D2.prototype.setSize = function(width, height) {
+    GameLib.Renderer.prototype.setSize.call(this);
+};