scaleBitmapData

private function scaleBitmapData(_bmd:BitmapData, 
											 targetContainerWidth:Number, targetContainerHeight:Number=0):Bitmap { 
				//set matrix sx & sy 
				var sx:Number = targetContainerWidth / _bmd.width; 
				var sy:Number = 0;
 
				if(targetContainerHeight==0){
					sy = sx;			
					targetContainerHeight = _bmd.height * sy;
 
				}else{
					sy = targetContainerHeight / _bmd.height; 				
				}
 
				//instantiate new matrix, and set scaling 
				var m:Matrix = new Matrix(); 
				m.scale(sx, sy); 
 
				//create new bitmapdata	
				var newBmd:BitmapData = new BitmapData(targetContainerWidth, targetContainerHeight); 
				//draw new bitmapdata with matrix	
				newBmd.draw(_bmd, m); 
				//create final bitmap with new bitmapdata 
				var newBmp:Bitmap = new Bitmap(newBmd); 
				//set smooting to true 
				newBmp.smoothing = true; 
 
				return newBmp; 
			}
 
	private function scalePhotoToTargetWidth(image:Bitmap,targetContainerWidth:int):Bitmap{
 
				var scaleFactor:Number = targetContainerWidth / image.width; 
				var targetContainerHeight:Number = scaleFactor * image.height;
 
				var scaleParams:Matrix = new Matrix(); 
				scaleParams.scale(scaleFactor,scaleFactor); 
 
				var newBmd:BitmapData = new BitmapData(targetContainerWidth, targetContainerHeight); 
				//draw new bitmapdata with matrix	
				newBmd.draw(image.bitmapData, scaleParams); 
				//create final bitmap with new bitmapdata 
				var newBmp:Bitmap = new Bitmap(newBmd); 
				//set smooting to true 
				newBmp.smoothing = true; 
 
				return newBmp; 
			}
 
			private function scalePhotoToTargetHeight(image:Bitmap, targetContainerHeight:int):Bitmap
			{
				var scaleFactor:Number = targetContainerHeight / image.height;
				var targetContainerWidth:Number = scaleFactor * image.width;
 
				var scaleParams:Matrix = new Matrix(); 
				scaleParams.scale(scaleFactor,scaleFactor); 
 
				var newBmd:BitmapData = new BitmapData(targetContainerWidth, targetContainerHeight); 
				//draw new bitmapdata with matrix	
				newBmd.draw(image.bitmapData, scaleParams); 
				//create final bitmap with new bitmapdata 
				var newBmp:Bitmap = new Bitmap(newBmd); 
				//set smooting to true 
				newBmp.smoothing = true; 
 
				return newBmp; 
			}