Border around Images when making PDF in PDFBox

Question

I have been using PDFBox to generate pdf files and was wondering if it is possible to add a border around images. If not, is there some algorithm that allows you to efficiently draw lines precisely around the image? I have the following code that allows myself to add an image to a pdf page:

//image for page 2
public File processPDF()
{
    //creating pdf
    PDDocument document = new PDDocument();
    File file = new File("NWProofReference.pdf");

    //adding first page to pdf, blank
    PDPage page = new PDPage();
    PDPageContentStream contentStream;

    try {
            BufferedImage awtImage = ImageIO.read(new File(PDFProcessing.image));
            PDXObjectImage ximage = new PDPixelMap(document, awtImage);
            float scale = 1.0f; // alter this value to set the image size
            contentStream.drawXObject(ximage,100,400, 
            (ximage.getWidth()*scale,ximage.getHeight()*scale);
            contentStream.close();

            document.save(file);
            document.close();
        } catch (Exception e)
        {
            e.printStackTrace();
        }

    return file;
}

Using this or any code, is there any way to actually add a border around the image itself that is made available through the PDFBox API?

Answer 1

Here's some code that adds a red border:

        BufferedImage awtImage = ImageIO.read(new File(PDFProcessing.image));
        PDXObjectImage ximage = new PDPixelMap(document, awtImage);
        float scale = 1.0f; // alter this value to set the image size
        contentStream.drawXObject(ximage,100,400,ximage.getWidth()*scale,ximage.getHeight()*scale);
        // these three lines are new
        contentStream.setStrokingColor(Color.red);
        contentStream.addRect(100-3, 400-3, ximage.getWidth()*scale+6, ximage.getHeight()*scale+6);
        contentStream.closeAndStroke();

        contentStream.close();

good luck! You can of course change the "3" to a smaller number.