// ==== Fonction permettant de scroller un Bitmap ==== //

private function DecalBmp(Bmp:Bitmap, diffX:int, diffY:int):void



{

    var ba:ByteArray = Bmp.bitmapData.getPixels(new Rectangle(



               (diffX > 0 ? diffX : 0), 

               (diffY > 0 ? diffY : 0), 

               Bmp.bitmapData.width - Math.abs(diffX), 

               Bmp.bitmapData.height - Math.abs(diffY)));

    ba.position = 0;

    Bmp.bitmapData.fillRect(new Rectangle(0, 0, Bmp.bitmapData.width, Bmp.bitmapData.height), 

               0xFFFFFF);

    Bmp.bitmapData.setPixels(new Rectangle(



              (diffX > 0 ? 0 : -(diffX)), 

              (diffY > 0 ? 0 : -(diffY)), 

              Bmp.bitmapData.width - Math.abs(diffX), 

              Bmp.bitmapData.height - Math.abs(diffY)), ba);



}