BitmapDataを綺麗にリサイズ

gistfile1.as

public function resizeLowQuality(src:BitmapData, width:Number, height:Number):BitmapData {
  var matrix:Matrix = new Matrix();
  matrix.scale(width / src.width, height / src.height);
  var dst:BitmapData = new BitmapData(width, height, true, 0);
  dst.draw(src, matrix, null, null, null, true);
  return dst;
}

public function resizeHighQuality(src:BitmapData, width:Number, height:Number):BitmapData {
  var bitmap:Bitmap = new Bitmap(src, 'auto', true);
  bitmap.width = width;
  bitmap.height = height;
  var tmp:Sprite = new Sprite();
  tmp.addChild(bitmap);
  var dst:BitmapData = new BitmapData(width, height, true, 0);
  dst.draw(tmp, null, null, null, null, true);
  return dst;
}