Bad performance convert tif to pdf using ITextSharp

Question

Summary: How can I reduce the amount of time it takes to convert tifs to pdfs using itextsharp?

Background: I\'m convertin

Answer 1

Based on your samples, i made a function that does both based on a simple Enum, you define the working mode, here it is:

private static void CombineAndConvertTif(FileInfo inputFile, FileInfo outputFile)
    {
        Encoder myEncoder = Encoder.Quality;
        EncoderParameters myEncoderParameters = new EncoderParameters(1);
        EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 50L);
        myEncoderParameters.Param[0] = myEncoderParameter;
        ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);

        Console.Write("Converting {0} to {1}... ", inputFile.Name, outputFile.Name);
        Stopwatch sw = Stopwatch.StartNew();

        using (
            FileStream fs = new FileStream(
                outputFile.FullName, FileMode.Create, FileAccess.ReadWrite, FileShare.None))
        {
            Document document = new Document(PageSize.A4, 50, 50, 50, 50);

            PdfWriter writer = PdfWriter.GetInstance(document, fs);

            writer.CompressionLevel = 100;
            writer.SetFullCompression();

            document.Open();
            PdfContentByte cb = writer.DirectContent;

            using (Bitmap bm = new Bitmap(inputFile.FullName))
            {
                int pages = bm.GetFrameCount(FrameDimension.Page);

                for (int currentPage = 0; currentPage < pages; ++currentPage)
                {
                    bm.SelectActiveFrame(FrameDimension.Page, currentPage);
                    bm.SetResolution(96, 96);

                    Image img;
                    if (QualityMode == QualityMode.Slow)
                    {
                        #region Low speed, smaller files
                        img = iTextSharp.text.Image.GetInstance(bm, null, true);
                        #endregion
                    }
                    else
                    {
                        #region Fast speed, bigger files
                        using (MemoryStream mem = new MemoryStream())
                        {
                            bm.Save(mem, jgpEncoder, myEncoderParameters);
                            img = Image.GetInstance(mem.ToArray());
                        }
                        #endregion
                    }

                    img.ScalePercent(72f / 200f * 100);
                    img.SetAbsolutePosition(0, 0);

                    cb.AddImage(img);
                    document.NewPage();
                }
            }

            document.Close();
            writer.Close();
        }

        sw.Stop();
        Console.WriteLine(" time: {0}", sw.Elapsed);
    }

And the enum is:

    internal enum QualityMode
{
    /// 

    /// Process images quickly but
    /// produces bigger PDFs
    /// 
    Fast,
    /// 

    /// Process images slower but
    /// produces smaller PDFs
    /// 
    Slow
}