[AS3]AS3.0 统计与计算文件FPS信息代码的示例

package { 
        import flash.display.*; 
        import flash.events.*; 
        import flash.geom.*; 
        import flash.system.*; 
        import flash.text.*; 
        import flash.utils.*; 
 
        public class FPS extends Sprite { 
                private var currentY:int; 
                private var diagramTimer:int; 
                private var tfTimer:int; 
                private var diagram:BitmapData; 
                private var mem:TextField; 
                private var fps:TextField; 
                private var tfDelay:int = 0; 
                static private  const maxMemory:uint = 4.1943e+007; 
                static private  const diagramWidth:uint = 60; 
                static private  const tfDelayMax:int = 10; 
                static private  var instance:FPS; 
                static private  const diagramHeight:uint = 40; 
                public function FPS():void { 
                        this.addEventListener(Event.ADDED_TO_STAGE,run); 
                } 
 
                private function run(e:Event):void { 
                        if (instance == null) { 
                                instance=this; 
                                fps = new TextField(); 
                                mem = new TextField(); 
                                this.mouseEnabled = false; 
                                this.mouseChildren = false; 
                                fps.defaultTextFormat = new TextFormat("Tahoma", 10, 13421772); 
                                fps.autoSize = TextFieldAutoSize.LEFT; 
                                fps.text = "FPS: " + Number(stage.frameRate).toFixed(2); 
                                fps.selectable = false; 
                                fps.x = -diagramWidth - 2; 
                                addChild(fps); 
                                mem.defaultTextFormat = new TextFormat("Tahoma", 10, 13421568); 
                                mem.autoSize = TextFieldAutoSize.LEFT; 
                                mem.text = "MEM: " + bytesToString(System.totalMemory); 
                                mem.selectable = false; 
                                mem.x = -diagramWidth - 2; 
                                mem.y = 10; 
                                addChild(mem); 
                                currentY = 20; 
                                diagram = new BitmapData(diagramWidth, diagramHeight, true, 0x20ffff00); 
                                var _loc_2:Bitmap = new Bitmap(diagram); 
                                _loc_2.y = currentY + 4; 
                                _loc_2.x = -diagramWidth; 
                                addChildAt(_loc_2, 0); 
                                this.addEventListener(Event.ENTER_FRAME, onEnterFrame); 
                                this.stage.addEventListener(Event.RESIZE, onResize); 
                                onResize(); 
                                diagramTimer = getTimer(); 
                                tfTimer = getTimer(); 
                        } 
                } 
                private function bytesToString(memory:uint):String { 
                        var _str:String; 
                        if (memory < 1024) { 
                                _str = String(memory) + "b"; 
                        } else if (memory < 10240) { 
                                _str = Number(memory / 1024).toFixed(2) + "kb"; 
                        } else if (memory < 102400) { 
                                _str = Number(memory / 1024).toFixed(1) + "kb"; 
                        } else if (memory < 1048576) { 
                                _str =int(memory / 1024) + "kb"; 
                        } else if (memory < 10485760) { 
                                _str = Number(memory / 1048576).toFixed(2) + "mb"; 
                        } else if (memory < 104857600) { 
                                _str = Number(memory / 1048576).toFixed(1) + "mb"; 
                        } else { 
                                _str = int(memory / 1048576) + "mb"; 
                        } 
                        return _str; 
                } 
 
                private function onEnterFrame(e:Event):void { 
                        tfDelay++; 
                        if (tfDelay >= tfDelayMax) { 
                                tfDelay = 0; 
                                fps.text = "FPS: " + Number(1000 * tfDelayMax / (getTimer() - tfTimer)).toFixed(2); 
                                tfTimer = getTimer(); 
                        } 
                        var _loc_2:* = 1000 / (getTimer() - diagramTimer); 
                        var _loc_3:* = _loc_2 > stage.frameRate ? (1) : (_loc_2 / stage.frameRate); 
                        diagramTimer = getTimer(); 
                        diagram.scroll(1, 0); 
                        diagram.fillRect(new Rectangle(0, 0, 1, diagramHeight), 0x20ffff00); 
                        diagram.setPixel32(0, diagramHeight * (1 - _loc_3), 0xffcccccc); 
                        mem.text = "MEM: " + bytesToString(System.totalMemory); 
                        var _loc_5:Number = System.totalMemory / maxMemory; 
                        diagram.setPixel32(0, diagramHeight * (1 - _loc_5), 0xffff6600); 
                } 
                private function onResize(e:Event = null):void { 
                        var _point:Point = parent.globalToLocal(new Point(80, 90));//stage.stageWidth  
                        this.x = _point.x; 
                        this.y = _point.y; 
                } 
        } 
} 

[AS3]AS3.0 统计与计算文件FPS信息代码的示例