Aspose.Words.Examples.CSharp.Programming_Documents.Working_with_Images.Resampler.Resample C# (CSharp) Method

        public static int Resample(Document doc, int desiredPpi, int jpegQuality)
        {
            int count = 0;

            // Convert VML shapes.
            foreach (Shape shape in doc.GetChildNodes(NodeType.Shape, true))
            {
                // It is important to use this method to correctly get the picture shape size in points even if the picture is inside a group shape.
                SizeF shapeSizeInPoints = shape.SizeInPoints;

                if (ResampleCore(shape.ImageData, shapeSizeInPoints, desiredPpi, jpegQuality))
                    count++;
            }

            return count;
        }

        public static void Run()
        {
            // The path to the documents directory.
            string dataDir     = RunExamples.GetDataDir_WorkingWithImages();
            string fileName    = "Test.docx";
            string srcFileName = dataDir + fileName;

            Console.WriteLine("Loading {0}. Size {1}.", srcFileName, GetFileSize(srcFileName));
            Document doc = new Document(srcFileName);

            // 220ppi Print - said to be excellent on most printers and screens.
            // 150ppi Screen - said to be good for web pages and projectors.
            // 96ppi Email - said to be good for minimal document size and sharing.
            const int desiredPpi = 150;

            // In .NET this seems to be a good compression / quality setting.
            const int jpegQuality = 90;

            // Resample images to desired ppi and save.
            int count = Resampler.Resample(doc, desiredPpi, jpegQuality);

            Console.WriteLine("Resampled {0} images.", count);

            if (count != 1)
            {
                Console.WriteLine("We expected to have only 1 image resampled in this test document!");
            }

            string dstFileName = dataDir + RunExamples.GetOutputFilePath(fileName);

            doc.Save(dstFileName);
            Console.WriteLine("Saving {0}. Size {1}.", dstFileName, GetFileSize(dstFileName));

            // Verify that the first image was compressed by checking the new Ppi.
            doc = new Document(dstFileName);
            Shape  shape    = (Shape)doc.GetChild(NodeType.Shape, 0, true);
            double imagePpi = shape.ImageData.ImageSize.WidthPixels / ConvertUtil.PointToInch(shape.SizeInPoints.Width);

            Debug.Assert(imagePpi < 150, "Image was not resampled successfully.");

            Console.WriteLine("\nCompressed images successfully.\nFile saved at " + dstFileName);
        }