ImageAtlas.as

package com.illuzor.tools {
	
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.Shape;
	import flash.display.Sprite;
	import flash.geom.Point;
	import flash.geom.Rectangle;
	import flash.system.System;
	import flash.utils.Dictionary;
	
	/**
	 * @author illuzor
	 */
	
	public class ImageAtlas {
		
		private var rectangles:Dictionary = new Dictionary();
		private var bitmapDatas:Dictionary = new Dictionary();
		private var imageData:BitmapData;
		
		public function ImageAtlas(imageData:BitmapData, xmlData:XML) {
			this.imageData = imageData;
			for each (var subTexture:XML in xmlData.SubTexture) {
				var name:String = subTexture.attribute("name");
				var x:Number = parseFloat(subTexture.attribute("x"));
				var y:Number = parseFloat(subTexture.attribute("y"));
				var width:Number = parseFloat(subTexture.attribute("width"));
				var height:Number = parseFloat(subTexture.attribute("height"));
				rectangles[name] = new Rectangle(x, y, width, height);
			}
			System.disposeXML(xmlData);
		}
		
		public function getBitmapData(name:String):BitmapData {
			if (!bitmapDatas.hasOwnProperty(name)) {
				var rect:Rectangle = rectangles[name];
				var bitmapData:BitmapData = new BitmapData(rect.width, rect.height);
				bitmapData.copyPixels(imageData, rect, new Point());
				bitmapDatas[name] = bitmapData;
			}
			return bitmapDatas[name];
		}
		
		public function getBitmap(name:String):Bitmap {
			var bitmap:Bitmap = new Bitmap(getBitmapData(name));
			bitmap.smoothing = true;
			return bitmap;
		}
		
		public function getSprite(name:String):Sprite {
			var sprite:Sprite = new Sprite();
			sprite.addChild(getBitmap(name));
			return sprite;
		}
		
		public function getShape(name:String):Shape {
			var bdata:BitmapData = getBitmapData(name);
			var shape:Shape = new Shape();
			shape.graphics.beginBitmapFill(bdata);
			shape.graphics.drawRect(0, 0, bdata.width, bdata.height);
			shape.graphics.endFill();
			return shape;
		}
		
		public function dispose():void {
			for each (var bitmapData:BitmapData in bitmapDatas) {
				bitmapData.dispose();
			}
			imageData.dispose();
		}
	}
}