How to stamp image on existing PDF and create an anchor?

Tags: clickable imageimageslink annotationannotationsiText 7

I have an existing document, onto which I would like to stamp an image at an absolute position. I am able to do this, but I would also like to make this image clickable: when a user clicks on the image I would like the PDF to go to the last page of the document. Here is my code:

PdfReader readerOriginalDoc = new PdfReader("src/main/resources/test.pdf");            
PdfStamper stamper = new PdfStamper(
    readerOriginalDoc, new FileOutputStream("NewStamper.pdf"));
PdfContentByte content = stamper.getOverContent(1);
Image image = Image.getInstance("src/main/resources/images.jpg");
image.scaleAbsolute(50, 20);
image.setAbsolutePosition(100, 100);
image.setAnnotation(new Annotation(0, 0, 0, 0, 3));
content.addImage(image);
stamper.close();
Any idea how to do this?

Posted on StackOverflow on Nov 17, 2014 by BYJU SUKUMARAN

You are using a technique that only works when creating documents from scratch.

Please take a look at the AddImageLink example to find out how to add an image and a link to make that image clickable to an existing document:

protected void manipulatePdf(String dest) throws Exception {
    PdfDocument pdfDoc = new PdfDocument(new PdfReader(src), new PdfWriter(dest));
    ImageData img = ImageDataFactory.create(imgSrc);
    float x = 10;
    float y = 650;
    float w = img.getWidth();
    float h = img.getHeight();
    PdfPage page = pdfDoc.getFirstPage();
    new PdfCanvas(page.newContentStreamAfter(), pdfDoc.getFirstPage().getResources(), pdfDoc)
            .addImage(img, x, y, false);
    Rectangle linkLocation = new Rectangle(x, y, w, h);
    PdfAnnotation annotation = new PdfLinkAnnotation(linkLocation)
            .setHighlightMode(PdfAnnotation.HIGHLIGHT_INVERT)
            .setAction(PdfAction.createGoTo(PdfExplicitDestination.createFit(pdfDoc.getLastPage())))
            .setBorder(new PdfArray(new float[]{0, 0, 0}));
    page.addAnnotation(annotation);
    pdfDoc.close();
}

You already have the part about adding the image right. Note that I create parameters for the position of the image as well as its dimensions:

float x = 10;
float y = 650;
float w = img.getWidth();
float h = img.getHeight();

I use these values to create a Rectangle object:

Rectangle linkLocation = new Rectangle(x, y, x + w, y + h);

This is the location for the link annotation we are creating with the PdfAnnotation class. You need to add this annotation separately using the addAnnotation() method.

You can take a look at the resulting pdf: if you click on the i icon, you jump to the last page of the document.

Click this link if you want to see how to answer this question in iText 5.