BitmapData移動也可以平滑

//##bg就是要使用的MOVIECLIP或物件 什麼鬼loder之類的
var bitmap:BitmapData=new BitmapData(bg.width, bg.height);
bm = new Bitmap(bitmap);
bm.pixelSnapping = 'auto';
bm.smoothing = true;

//設定matrix來縮放原圖大小
//var matrix:Matrix = new Matrix();
//等比縮放
//var scale:Number = p_width / _ldr.content.width;
//matrix.scale(scale, scale);
//強致縮放
//var scaleX:Number = p_width / _ldr.content.width;
//var scaleY:Number = 44 / _ldr.content.height;
//matrix.scale(scaleX, scaleY);


//畫出來
//bitmap.draw(_ldr,matrix);
bitmap.draw(bg);
addChild(bm);