ImageProcessor.Processors.Rotate.RotateImage C# (CSharp) Méthode

        private Bitmap RotateImage(Image image, float rotateAtX, float rotateAtY, float angle)
        {
            Rectangle newSize = ImageMaths.GetBoundingRotatedRectangle(image.Width, image.Height, angle);

            int x = (newSize.Width - image.Width) / 2;
            int y = (newSize.Height - image.Height) / 2;

            // Create a new empty bitmap to hold rotated image
            Bitmap newImage = new Bitmap(newSize.Width, newSize.Height, PixelFormat.Format32bppPArgb);
            newImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);

            // Make a graphics object from the empty bitmap
            using (Graphics graphics = Graphics.FromImage(newImage))
            {
                // Reduce the jagged edge.
                GraphicsHelper.SetGraphicsOptions(graphics);

                // Put the rotation point in the "center" of the image
                graphics.TranslateTransform(rotateAtX + x, rotateAtY + y);

                // Rotate the image
                graphics.RotateTransform(angle);

                // Move the image back
                graphics.TranslateTransform(-rotateAtX - x, -rotateAtY - y);

                // Draw passed in image onto graphics object
                graphics.DrawImage(image, new PointF(x, y));
            }

            image.Dispose();
            return newImage;
        }