code: public static RectangleLength2D_I32 boundBox( int srcWidth , int srcHeight ,
  												  int dstWidth , int dstHeight ,
  												  Point2D_F32 work,
  												  PixelTransform<Point2D_F32> transform )
  	{
  		RectangleLength2D_I32 ret = boundBox(srcWidth,srcHeight,work,transform);
  
  		int x0 = ret.x0;
  		int y0 = ret.y0;
  		int x1 = ret.x0 + ret.width;
  		int y1 = ret.y0 + ret.height;
  
  		if( x0 < 0 ) x0 = 0;
  		if( x1 > dstWidth) x1 = dstWidth;
  		if( y0 < 0 ) y0 = 0;
  		if( y1 > dstHeight) y1 = dstHeight;
  
  		return new RectangleLength2D_I32(x0,y0,x1-x0,y1-y0);
  	}
docs: Finds an axis-aligned bounding box which would contain a image after it has been transformed.
  A sanity check is done to made sure it is contained inside the destination image's bounds.
  If it is totally outside then a rectangle with negative width or height is returned.
  
  @param srcWidth Width of the source image
  @param srcHeight Height of the source image
  @param dstWidth Width of the destination image
  @param dstHeight Height of the destination image
  @param transform Transform being applied to the image
  @return Bounding box