1 files changed, 35 insertions, 0 deletions
diff --git a/third_party/webkit/PerformanceTests/MotionMark/tests/simple/resources/simple-canvas.js b/third_party/webkit/PerformanceTests/MotionMark/tests/simple/resources/simple-canvas.js
new file mode 100644
index 0000000000..483d535d75
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/MotionMark/tests/simple/resources/simple-canvas.js
@@ -0,0 +1,35 @@
+Utilities.extendObject(SimpleCanvasStage.prototype, {
+    tune: function(count)
+    {
+        if (count == 0)
+            return;
+
+        if (count < 0) {
+            this.offsetIndex = Math.max(this.offsetIndex + count, 0);
+            return;
+        }
+
+        this.offsetIndex = this.offsetIndex + count;
+        if (this.offsetIndex > this.objects.length) {
+            // For some tests, it may be easier to see how well the test is going
+            // by limiting the range of coordinates in which new objects can reside
+            var coordinateMaximumFactor = Math.min(this.objects.length, Math.min(this.size.x, this.size.y)) / Math.min(this.size.x, this.size.y);
+            var newIndex = this.offsetIndex - this.objects.length;
+            for (var i = 0; i < newIndex; ++i)
+                this.objects.push(new this._canvasObject(this, coordinateMaximumFactor));
+        }
+    },
+
+    animate: function()
+    {
+        var context = this.context;
+        context.clearRect(0, 0, this.size.x, this.size.y);
+        for (var i = 0, length = this.offsetIndex; i < length; ++i)
+            this.objects[i].draw(context);
+    },
+
+    complexity: function()
+    {
+        return this.offsetIndex;
+    }
+});