forked from: forked from: Edgeとり。

Edgeとり。

自分自身のためのメモ。
できたから上げただけでチャレンジフェイズで殺されるレベル。

by haneimo 25 Feb 2012

• Forked from ug24k8's forked from: 2009-3-14 wonderfl に任意の画像を埋め込む
• Diff: 91
• Related works: 5

Tags

edge edge-detection edge_detection
Embed

package 
{
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.DisplayObjectContainer;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.geom.Rectangle;
    import flash.utils.ByteArray;
    import flash.display.Loader;
    
    [ SWF( width = "160" , height = "120" , backgroundColor = "0xFFFFFF" , frameRate = "60" ) ]
    public class Main extends Sprite 
    {
        
        // 画像データ
        private const data:String = "iVBORw0KGgoAAAANSUhEUgAAAKAAAAB4BAMAAACHjORcAAAAMFBMVEX/////zkL///////////////////////////////////////////////////////9OIM9nAAAA/0lEQVR4nO2YbQ6CMBBEuzdg739ZQ4KCQtudZQRt5v0isXmZ7gcJliKEEEIICuZ0oU9co89QjTYbqSnpGZ0d0dkRnW10ttEWIa+M9IjlWxF5QuvcGa5Gpy34clq7LYmWeSuiJSrcitiJD0d0TwlrbTFPCt+2xQ7iwcLtKL4ejSCcPjVnhQ1GE5YbhNjbLXDl0YR9X/J1c6kQunNECEW8R4jceRAhUsTApowmDPn+QAjMzbXC6fk7UbhMAUm4HjgnPDgQ9u3munIiLdxXHxT2dKeEldlICuuTBgnXEnbOgPHaqxAWRj8djC0s0V3Of9xcJdw0hfy/mhBCCCGEEL/IA9soYNoy7IFIAAAAAElFTkSuQmCC"
        private var bitmap:Bitmap;
        /**
         * コンストラクタ
         */
        public function Main():void 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }
        
        private function init(e:Event = null):void 
        {    
            removeEventListener(Event.ADDED_TO_STAGE, init);
            // entry point
            Base64ImageLoader.load(data, compfunc);

        }
    
        private function compfunc(loader:Loader):void {
            bitmap = new Bitmap(new BitmapData(
                loader.width,loader.height,true,0xFFFFFFFF));
            bitmap.bitmapData.draw(loader);
            edgeTrace(bitmap, 0xFFFFFFFF);
            addChild(bitmap);
        }
        
        private function getColor(byteArray:ByteArray, index:uint ):uint{
            var i:uint = (index * 4);
            var color:uint = byteArray[i] << 8*3
                           | byteArray[i + 1] << 8*2
                           | byteArray[i + 2] << 8
                           | byteArray[i + 3];
            return color;
        }
            
        private function edgeTrace(bitmap:Bitmap, innerColor:uint, edgeColor:uint = 0xFF000000):void {
            var width:uint = bitmap.bitmapData.width;
            var height:uint = bitmap.bitmapData.height;

            var byteArray:ByteArray = bitmap.bitmapData.getPixels( new Rectangle(0, 0, 160, 120) );
            var newByteArray:ByteArray = new ByteArray();
            var indexLength:uint = byteArray.length / 4;
            
            byteArray.position = 0;
            for (var i:int = 0; i < indexLength; i++) {
                newByteArray.writeUnsignedInt( byteArray.readUnsignedInt() ); //edgeColor & (0xFF000000) >> 3;
                if ( getColor(byteArray, i) == innerColor )continue;
                var flag:Boolean = false;
                 if ( i%width + 1 < width && getColor(byteArray,i +1) == innerColor )flag=true;
                if ( i%width - 1 > 0 && getColor(byteArray, i - 1) == innerColor )flag=true;
                if ( (i + width)/width < height && getColor( byteArray, i + width) == innerColor )flag=true;
                if ( (i - width)/width > 0 && getColor( byteArray, i - width) == innerColor )flag=true;
                if (!flag) continue;
                newByteArray[i*4]=0xFF; //edgeColor & (0xFF000000) >> 3;
                newByteArray[i*4+1]=0x00; //edgeColor & (0xFF000000) >> 3;
                newByteArray[i*4+2]=0x00; //edgeColor & (0xFF000000) >> 3;
                newByteArray[i*4+3]=0x00; //edgeColor & (0xFF000000) >> 3;
            }
            newByteArray.position = 0;
            bitmap.bitmapData.setPixels( new Rectangle(0, 0, 160, 120), newByteArray);
        }
    }
}

class Base64ImageLoader
{
    import flash.display.DisplayObjectContainer;
    import flash.display.Loader;
    import flash.utils.ByteArray;
    import mx.utils.Base64Decoder;
    
    import flash.events.Event;
    import flash.display.Bitmap;
     import flash.display.BitmapData;   

    static public function load(data:String,compfunc:Function):Loader
    {
        var byteArray:ByteArray;
        var base64Decoder:Base64Decoder;
        var loader:Loader;
        var bmp:Bitmap = new Bitmap();
        
        base64Decoder = new Base64Decoder();
        base64Decoder.decode(data);
        
        try {
            byteArray = base64Decoder.toByteArray();
            byteArray.position = 0;
        } catch (e:Error) {
            return null;
        }
        
        loader = new Loader();
        loader.loadBytes(byteArray);
        //読み込みが完了したらbitmapDataに書き込む。
        loader.contentLoaderInfo.addEventListener(
            Event.COMPLETE,
            function(e:Event):void{compfunc(loader);}
        );
        return loader;
    }
}