新增scene.optimizeCost参数 用于优化cost过高情况

source/src/ECS/Scene.ts

@@ -1,4 +1,6 @@
 module es {
+    import Bitmap = egret.Bitmap;
+
     /** 场景 */
     export class Scene extends egret.DisplayObjectContainer {
         /**
@@ -33,7 +35,14 @@ module es {
         public _renderers: Renderer[] = [];
         public readonly _postProcessors: PostProcessor[] = [];
         public _didSceneBegin;
+        /**
+         * 动态合批
+         */
         public dynamicBatch: boolean = false;
+        /**
+         * 极致优化cost 会失去所有的事件（触摸、点击） 慎重开启
+         */
+        public optimizeCost: boolean = false;
 
         constructor() {
             super();
@@ -203,6 +212,7 @@ module es {
                     this.addChild(component.displayObject);
                     this.addChild(component.debugDisplayObject);
                     batching = false;
+                    if (this.optimizeCost && displayContainer) this.optimizeCombine(displayContainer);
                     displayContainer = null;
                 } else if (component instanceof RenderableComponent) {
                     // 静态
@@ -210,6 +220,8 @@ module es {
                         batching = true;
                         displayContainer = new egret.DisplayObjectContainer();
                         displayContainer.cacheAsBitmap = true;
+                        displayContainer.touchEnabled = false;
+                        displayContainer.touchChildren = false;
                         this.addChild(displayContainer);
                     }
 
@@ -217,6 +229,18 @@ module es {
                     displayContainer.addChild(component.debugDisplayObject);
                 }
             }
+
+            if (this.optimizeCost && displayContainer) this.optimizeCombine(displayContainer);
+        }
+
+        private optimizeCombine(container: egret.DisplayObjectContainer){
+            let renderTexture = new egret.RenderTexture();
+            renderTexture.drawToTexture(container, new Rectangle(0, 0, container.width, container.height));
+            let parent = container.parent;
+            let index = this.getChildIndex(container);
+            parent.addChildAt(new Bitmap(renderTexture), index);
+            parent.removeChild(container);
+            container.removeChildren();
         }
 
         /**