Color Average

どこぞかのサイト様を参考(というか丸写し)させていただききました。

by deform 19 Feb 2010

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/**
 * Copyright deform ( http://wonderfl.net/user/deform )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/ip6h
 */

// どこぞかのサイト様を参考(というか丸写し)させていただききました。

package {
    import flash.display.Sprite;
    import flash.display.BitmapData;
    import flash.geom.Matrix;
    import flash.display.DisplayObject;
    import flash.display.Loader;
    import flash.net.URLRequest;
    import flash.events.Event;
    import flash.text.TextField;
    import flash.system.LoaderContext;
    public class FlashTest extends Sprite {
    		
    		private var loader:Loader;
    		private var threshold:uint;
    		
        public function FlashTest() {
            // write as3 code here..
            loader = new Loader();
            var context:LoaderContext = new LoaderContext(true);
            loader.load(new URLRequest("http://lh4.ggpht.com/_eRXo-YR2fNw/S3a1YUcgkkI/AAAAAAAAAI0/uMIwMeyd-L8/s640/002.JPG"), context);
			loader.contentLoaderInfo.addEventListener(Event.COMPLETE, _onLoaded);
        }
        
        private function _onLoaded(e:Event):void
        {
            addChild(loader);
			e.target.removeEventListener(Event.COMPLETE, _onLoaded);
        		colorAverage(loader);
        		
        		var tf:TextField = new TextField();
        		var average:Number = colorAverage(loader);
        		var averageHex:uint = Number("0x"+average.toString(16));
        		if(averageHex < 0x888888) tf.text = "DARKEN : ";
        		else tf.text = "LIGHTEN : ";
        		
        		var spr:Sprite = new Sprite();
        		spr.graphics.beginFill(averageHex);
        		spr.graphics.drawRect(0,30,stage.stageWidth,30);
        		spr.graphics.endFill();
        		
        		tf.appendText(averageHex.toString());
        		addChild(tf);
        }
        
        public function colorAverage(target:DisplayObject):uint {
        		var bmd:BitmapData = new BitmapData(1, 1, false);
        		var mat:Matrix = new Matrix();
        		mat.scale(1/(target.width/target.scaleX), 1/(target.height/target.scaleY));
        		bmd.draw(target, mat);
        		
        		var aveColor:uint = bmd.getPixel(0,0);
        		
        		var spr:Sprite = new Sprite();
        		spr.graphics.beginFill(aveColor);
        		spr.graphics.drawRect(0,0,stage.stageWidth,30);
        		spr.graphics.endFill();
        		addChild(spr);
        		
        		return aveColor;
        }
    }
}