BaconographyWP8.View.ScalingGifView.ResizeImage C# (CSharp) Method

        void ResizeImage(bool center)
        {
            if (_coercedScale != 0)
            {
                double newWidth;
                double newHeight;
                if (_interop != null)
                {
                    newWidth = image.Width = Math.Round(_interop.Width * _coercedScale);
                    newHeight = image.Height = Math.Round(_interop.Height * _coercedScale);
                }
                else return;

                viewport.Bounds = new Rect(0, 0, newWidth, newHeight);

                if (center)
                {
                    viewport.SetViewportOrigin(
                        new Point(
                            Math.Round(newWidth / 2),
                            Math.Round(newHeight / 2)
                            ));
                }
                else
                {
                    Point newImgMid = new Point(newWidth * _relativeMidpoint.X, newHeight * _relativeMidpoint.Y);
                    Point origin = new Point(newImgMid.X - _screenMidpoint.X, newImgMid.Y - _screenMidpoint.Y);
                    viewport.SetViewportOrigin(origin);
                }
            }
        }