SenseNet.ContentRepository.ImageResizer.CreateCropedImageFile C# (CSharp) Метод

        public static Stream CreateCropedImageFile(Stream originalStream, double x, double y, double q, ImageFormat outputFormat, SmoothingMode smoothingMode, InterpolationMode interpolationMode, PixelOffsetMode pixelOffsetMode, double verticalDiff, double horizontalDiff)
        {


            if (originalStream == null)
                return new MemoryStream();

            Stream newMemoryStream;

            using (var originalImage = System.Drawing.Image.FromStream(originalStream))
            {
                using (var bmp = new Bitmap((int)x, (int)y))
                {
                    double verticalOffset = verticalDiff;
                    double horizontalOffset = horizontalDiff;
                    if(horizontalDiff == double.MaxValue)
                    {
                        horizontalOffset = originalImage.Width - x;
                    }else if(horizontalDiff < 0)
                    {
                        horizontalOffset = (originalImage.Width - x)/2;
                    }

                    if(horizontalOffset<0)
                        horizontalOffset = 0;

                    if (verticalDiff == double.MaxValue)
                    {
                        verticalOffset = originalImage.Height - y;
                    }else if(verticalDiff < 0)
                    {
                        verticalOffset = (originalImage.Height - y)/2;
                    }

                    if(verticalOffset<0)
                        verticalOffset = 0;

                    bmp.SetResolution(originalImage.HorizontalResolution, originalImage.VerticalResolution);
                    using (var graphic = Graphics.FromImage(bmp))
                    {
                        graphic.SmoothingMode = smoothingMode;
                        graphic.InterpolationMode = interpolationMode;
                        graphic.PixelOffsetMode = pixelOffsetMode;
                        graphic.DrawImage(originalImage, new Rectangle(0, 0, (int)x, (int)y), (int)horizontalOffset, (int)verticalOffset, (int)x, (int)y, GraphicsUnit.Pixel);
                        newMemoryStream = new MemoryStream();
                        bmp.Save(newMemoryStream, originalImage.RawFormat);
                        
                        if(bmp != null)
                            bmp.Dispose();
                    }
                }
            }
            newMemoryStream.Position = 0;
            return newMemoryStream;
        }