From d1437651c9e00ae843b7b281e992b75e34aaaf83 Mon Sep 17 00:00:00 2001
From: mumuy <zhenghaole1990@126.com>
Date: Tue, 10 May 2016 00:40:06 +0800
Subject: [PATCH] =?UTF-8?q?updated=20=E5=9C=B0=E5=9B=BE=E9=9D=99=E6=80=81?=
 =?UTF-8?q?=E6=97=B6=E4=B8=8D=E5=8F=8D=E5=A4=8D=E8=BF=9B=E8=A1=8C=E7=BB=98?=
 =?UTF-8?q?=E5=88=B6=E8=AE=A1=E7=AE=97=EF=BC=8C=E8=80=8C=E6=98=AF=E7=BC=93?=
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Content-Transfer-Encoding: 8bit

---
 game.js  | 15 ++++++++++++++-
 index.js |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/game.js b/game.js
index 4a2747a..65a5387 100644
--- a/game.js
+++ b/game.js
@@ -110,6 +110,7 @@ function Game(id,params){
 			y_length:0,					//二维数组y轴长度
       frames:1,				//速度等级,内部计算器times多少帧变化一次
 			times:0,				//刷新画布计数(用于循环动画状态判断)
+      cache:false,    //是否静态（如静态则设置缓存）
 			update:function(){},		//更新地图数据
 			draw:function(){},			//绘制地图
 		};
@@ -311,6 +312,7 @@ function Game(id,params){
 		map.stage = this;
 		map.y_length = map.data.length;
 		map.x_length = map.data[0].length;
+    map.imageData = null;
 		this.maps.push(map);
 		return map;
 	};
@@ -345,7 +347,18 @@ function Game(id,params){
 							map.times = f/map.frames;		//计数器
 						}
 						map.update();
-						map.draw(_context);
+            if(map.cache){
+              if(!map.imageData){
+                _context.save();
+                map.draw(_context);
+                map.imageData = _context.getImageData(0,0,_.width,_.height);
+                _context.restore();
+              }else{
+                _context.putImageData(map.imageData,0,0);
+              }
+            }else{
+              map.draw(_context);
+            }
 					});
 				}
 				if(stage.items.length){
diff --git a/index.js b/index.js
index 1eee44f..206f90c 100644
--- a/index.js
+++ b/index.js
@@ -143,6 +143,7 @@
 			x:60,
 			y:10,
 			data:_DATA,
+			cache:true,
 			draw:function(context){
 				for(var j=0; j<this.y_length; j++){
 					for(var i=0; i<this.x_length; i++){