flash on 2010-10-4

by uwi 04 Oct 2010

Embed

/**
 * Copyright uwi ( http://wonderfl.net/user/uwi )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/iBO8
 */

package {
    import flash.text.*;
    import flash.display.*;
    import flash.geom.*;
    import flash.events.*;
    import flash.filters.*;

    public class Test extends Sprite {
        private var _tf : TextField;
        private var _W : uint;
        private var _H : uint;
        private var _original : BitmapData;
        private var _mask : BitmapData;
        private var _canvas : BitmapData;

        public function Test() {
            _tf = new TextField();
            _tf.width = 465;
            _tf.height = 465;
            addChild(_tf);

            _original = textToBitmapData("追浜", new TextFormat("arial", 100));
            _W = _original.width;
            _H = _original.height;
            _mask = new BitmapData(_W, _H, true, 0);
            _mask.threshold(_original, _original.rect, new Point(), "==", 0xffffff, 0xff000000, 0xffffff);
//            addChild(new Bitmap(_mask));
            
            _canvas = new BitmapData(_W, _H, false, 0);
            
            dot();
            
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
            addChild(new Bitmap(_canvas));
            
            var mat : Array = [];
            for(var r : uint = 0;r < 5;r++){
                for(var c : uint = 0;c < 5;c++){
//                    mat.push(Math.min(1, 1 / ((r - 2) * (r - 2) + (c - 2) * (c - 2) + 1)));
                    mat.push(r == 2 && c == 2 ? 0.5 : 0.1);
                }
            }
            _cf = new ConvolutionFilter(5, 5, mat);
        }
        
        private var _cf : ConvolutionFilter;

        private var _step : uint = 0;
        
        private function dot() : void
        {
                for(var x : uint = 0;x < _W;x++){
            for(var y : uint = 0;y < _H;y++){
                    if(_original.getPixel(x, y) == 0 && _canvas.getPixel(x, y) == 0){
                        _canvas.setPixel(x, y, 0x223377);
                        return;
                    }
                }
            }
        }
        
        private function onEnterFrame(e : Event) : void
        {
            if(_step % 1 == 0){
                _canvas.lock();
                _canvas.applyFilter(_canvas, _canvas.rect, new Point(), _cf);
                _canvas.copyPixels(_mask, _mask.rect, new Point());
                _canvas.unlock();
            }

            if(_step % 10 == 0){
                dot();
            }

            _step++;
        }
       
        private function textToBitmapData(src : String, tfmt : TextFormat) : BitmapData
        {
            var tf : TextField = new TextField();
            tf.autoSize = "left";
            tf.defaultTextFormat = tfmt;
            tf.text = src;
            var bmd : BitmapData = new BitmapData(tf.width, tf.height, false, 0xffffff);
            bmd.draw(tf);
            return bmd;   
        }

        private function tr(...o : Array) : void
        {
            _tf.appendText(o + "\n");
        }
    }
}