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

I'm not sure what was available when this question was originally posted but it appears iText 5.x has more to offer when converting TIFF to PDF. There is also a basic code sample in iText in Action 2nd Edition "part3.chapter10.PagedImages" and I haven't noticed any performance problems. However, the sample doesn't handle scaling well so I changed it like this:

public static void AddTiff(Document pdfDocument, Rectangle pdfPageSize, String tiffPath)
{
    RandomAccessFileOrArray ra = new RandomAccessFileOrArray(tiffPath);
    int pageCount = TiffImage.GetNumberOfPages(ra);

    for (int i = 1; i <= pageCount; i++) 
    {
        Image img = TiffImage.GetTiffImage(ra, i);

        if (img.ScaledWidth > pdfPageSize.Width || img.ScaledHeight > pdfPageSize.Height)
        {
            if (img.DpiX != 0 && img.DpiY != 0 && img.DpiX != img.DpiY)
            {
                img.ScalePercent(100f);
                float percentX = (pdfPageSize.Width * 100) / img.ScaledWidth;
                float percentY = (pdfPageSize.Height * 100) / img.ScaledHeight;

                img.ScalePercent(percentX, percentY);
                img.WidthPercentage = 0;
            }
            else
            {
                img.ScaleToFit(pdfPageSize.Width, pdfPageSize.Height);
            }
        }

        Rectangle pageRect = new Rectangle(0, 0, img.ScaledWidth, img.ScaledHeight);

        pdfDocument.SetPageSize(pageRect);
        pdfDocument.SetMargins(0, 0, 0, 0);
        pdfDocument.NewPage();
        pdfDocument.Add(img);
    }
}