[iText-questions] iText images to 72 dpi

[Eric Stephens]

Title: Message

First let me just say: "What an amazing piece of work!"

 

Can you recommend the best way to use iText to create a PDF from an HTML file?

 

I have been using iText to segment PDFs so that I can stream only certain pages to a browser.    Because many of the PDFs started as scanned TIFFs they are quite large (20+ Meg).  Even a page can be 500k. 

Is it possible to detect large bitmaps and down sample them to 72 dpi using iText?

Here's the code.

    

 

    PdfReader reader = new PdfReader(PDFfile);
    // we retrieve the total number of pages
    int n = reader.getNumberOfPages();
    System.out.print(PDFfile + " has " + n + " pages. Start at page " + page0);
 

    // step 1: creation of a document-object
    Document document1 = new Document(reader.getPageSizeWithRotation(1));
    // step 2: we create a writer that listens to the document
    PdfWriter writer1 = PdfWriter.getInstance(document1, new FileOutputStream("/tmp/temp" + page0 + ".pdf"));
    // step 3: we open the document
    document1.open();
    PdfContentByte cb1 = writer1.getDirectContent();
    PdfImportedPage apage;
    int rotation;
    int i = page0-1;
    // step 4: we add content
    while (i < (page0+pages-1)) {
     i++;
     document1.setPageSize(reader.getPageSizeWithRotation(i));
     document1.newPage();
     apage = writer1.getImportedPage(reader, i);
     rotation = reader.getPageRotation(i);
     if (rotation == 90 || rotation == 270) {
      cb1.addTemplate(apage, 0, -1f, 1f, 0, 0, reader.getPageSizeWithRotation(i).height());
     }
     else {
      cb1.addTemplate(apage, 1f, 0, 0, 1f, 0, 0);
     }
    }

    // step 5: we close the document
    document1.close();

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Eric R. Stephens, Ph.D. [EMAIL PROTECTED] What the team needs to know now!

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