starling 中使用的stats类

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/** * stats.as * https://github.com/mrdoob/Hi-ReS-Stats *  * Released under MIT license: * http://www.opensource.org/licenses/mit-license.php * * How to use: *  *addChild( new Stats() ); * **/package net.hires.debug {import flash.display.BitmapData;import flash.display.Sprite;import flash.events.Event;import flash.events.MouseEvent;import flash.geom.Matrix;import flash.geom.Rectangle;import flash.system.System;import flash.text.StyleSheet;import flash.text.TextField;import flash.utils.getTimer;public class Stats extends Sprite {protected const WIDTH : uint = 70;protected const HEIGHT : uint = 100;protected var xml : XML;protected var text : TextField;protected var style : StyleSheet;protected var timer : uint;protected var fps : uint;protected var ms : uint;protected var ms_prev : uint;protected var mem : Number;protected var mem_max : Number;protected var graph : BitmapData;protected var rectangle : Rectangle;protected var fps_graph : uint;protected var mem_graph : uint;protected var mem_max_graph : uint;protected var colors : Colors = new Colors();/** * <b>Stats</b> FPS, MS and MEM, all in one. */public function Stats() : void {mem_max = 0;xml = <xml><fps>FPS:</fps><ms>MS:</ms><mem>MEM:</mem><memMax>MAX:</memMax></xml>;style = new StyleSheet();style.setStyle('xml', {fontSize:'9px', fontFamily:'_sans', leading:'-2px'});style.setStyle('fps', {color: hex2css(colors.fps)});style.setStyle('ms', {color: hex2css(colors.ms)});style.setStyle('mem', {color: hex2css(colors.mem)});style.setStyle('memMax', {color: hex2css(colors.memmax)});text = new TextField();text.width = WIDTH;text.height = 50;text.styleSheet = style;text.condenseWhite = true;text.selectable = false;text.mouseEnabled = false;rectangle = new Rectangle(WIDTH - 1, 0, 1, HEIGHT - 50);addEventListener(Event.ADDED_TO_STAGE, init, false, 0, true);addEventListener(Event.REMOVED_FROM_STAGE, destroy, false, 0, true);}private function init(e : Event) : void {graphics.beginFill(colors.bg);graphics.drawRect(0, 0, WIDTH, HEIGHT);graphics.endFill();addChild(text);graph = new BitmapData(WIDTH, HEIGHT - 50, false, colors.bg);graphics.beginBitmapFill(graph, new Matrix(1, 0, 0, 1, 0, 50));graphics.drawRect(0, 50, WIDTH, HEIGHT - 50);addEventListener(MouseEvent.CLICK, onClick);addEventListener(Event.ENTER_FRAME, update);}private function destroy(e : Event) : void {graphics.clear();while(numChildren > 0)removeChildAt(0);graph.dispose();removeEventListener(MouseEvent.CLICK, onClick);removeEventListener(Event.ENTER_FRAME, update);}private function update(e : Event) : void {timer = getTimer();if( timer - 1000 > ms_prev ) {ms_prev = timer;mem = Number((System.totalMemory * 0.000000954).toFixed(3));mem_max = mem_max > mem ? mem_max : mem;fps_graph = Math.min(graph.height, ( fps / stage.frameRate ) * graph.height);mem_graph = Math.min(graph.height, Math.sqrt(Math.sqrt(mem * 5000))) - 2;mem_max_graph = Math.min(graph.height, Math.sqrt(Math.sqrt(mem_max * 5000))) - 2;graph.scroll(-1, 0);graph.fillRect(rectangle, colors.bg);graph.setPixel(graph.width - 1, graph.height - fps_graph, colors.fps);graph.setPixel(graph.width - 1, graph.height - ( ( timer - ms ) >> 1 ), colors.ms);graph.setPixel(graph.width - 1, graph.height - mem_graph, colors.mem);graph.setPixel(graph.width - 1, graph.height - mem_max_graph, colors.memmax);xml.fps = "FPS: " + fps + " / " + stage.frameRate; xml.mem = "MEM: " + mem;xml.memMax = "MAX: " + mem_max;fps = 0;}fps++;xml.ms = "MS: " + (timer - ms);ms = timer;text.htmlText = xml;}private function onClick(e : MouseEvent) : void {mouseY / height > .5 ? stage.frameRate-- : stage.frameRate++;xml.fps = "FPS: " + fps + " / " + stage.frameRate;  text.htmlText = xml;}// .. Utilsprivate function hex2css( color : int ) : String {return "#" + color.toString(16);}}}class Colors {public var bg : uint = 0x000033;public var fps : uint = 0xffff00;public var ms : uint = 0x00ff00;public var mem : uint = 0x00ffff;public var memmax : uint = 0xff0070;}