Draw Image with Background color using PDF BOX library

Question

Using below code I am able to create a pdf doc with an image but I would like to place the image on top of an background colour, I tried bit on my side but not able to achieve it can any one help me in achieving this:

public class SimpleTable {

    public static void main(String args[]) throws Exception {
          //Loading an existing document

          PDDocument doc = new PDDocument();  

          PDPage my_page = new PDPage();
          //Retrieving the page
     doc.addPage(my_page);

          //Creating PDImageXObject object
          PDImageXObject pdImage = PDImageXObject.createFromFile("D:\\QRCode.png",doc);

          //creating the PDPageContentStream object
          PDPageContentStream contents = new PDPageContentStream(doc, my_page);
          PDImageXObject
          //Drawing the image in the PDF document
          contents.drawImage(pdImage, 70, 250);
          contents.setNotStrokingColoar(Color.RED);

          System.out.println("Image inserted");

          //Closing the PDPageContentStream object
          contents.close();     

          //Saving the document
          doc.save("D:\\QRCode.pdf");

          //Closing the document
          doc.close();

       }



}

Note: the background-colour occupancy will be same as image size

Answer 1

Put this before drawing your image and remove the fill that is in your current code:

contents.setNotStrokingColoar(Color.RED);
contents.addRect(70, 250, pdImage.getWidth(), pdImage.getHeight());
contents.fill();

Be aware that a background color will make it more difficult to scan the QR code because there'll be less contrast.