Add an Image to a PDF Page as a Stamp Annotation

StampedImage.java

/*
 * Copyright Datalogics, Inc. 2015
 */

package pdfjt.cookbook.imaging;

import com.adobe.internal.io.ByteReader;
import com.adobe.internal.io.ByteWriter;
import com.adobe.internal.io.InputStreamByteReader;
import com.adobe.pdfjt.pdf.document.PDFDocument;
import com.adobe.pdfjt.pdf.document.PDFOpenOptions;
import com.adobe.pdfjt.pdf.document.PDFSaveFullOptions;
import com.adobe.pdfjt.pdf.graphics.xobject.PDFXObjectForm;
import com.adobe.pdfjt.pdf.interactive.annotation.PDFAnnotationStamp;
import com.adobe.pdfjt.pdf.interactive.annotation.PDFAppearance;
import com.adobe.pdfjt.pdf.page.PDFPage;
import com.adobe.pdfjt.services.imageconversion.ImageManager;
import com.adobe.pdfjt.services.xobjhandler.XObjectUseOptions;

import java.awt.image.BufferedImage;
import java.io.InputStream;
import java.net.URL;
import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;

import pdfjt.util.SampleFileServices;

/**
 * This sample reproduces the Acrobat (Windows-only) behavior where an image on
 * the clip board can be pasted on a PDF page resulting in a Stamp Annotation.
 * In this case, the image is read from a file.
 */
public class StampedImage {

    private static final String inputPDF = "http://dev.datalogics.com/cookbook/imaging/StampedImageInput.pdf";
    private static final String inputImage = "http://dev.datalogics.com/cookbook/imaging/PikePark.png";
    private static final String outputDir = "cookbook/Imaging/output/";

    static public void main(String[] args) throws Exception {
        SampleFileServices.createDir(outputDir);
        try {
            // First read in the PDF file and get the first page so we can add a
            // Stamp to it.
            InputStream fis = new URL(inputPDF).openStream();
            ByteReader byteReader = new InputStreamByteReader(fis);
            PDFDocument pdfDocument = PDFDocument.newInstance(byteReader, PDFOpenOptions.newInstance());
            PDFPage pdfPage = pdfDocument.requirePages().getPage(0);

            // Read in the image file as a BufferedImage.
            ImageReader reader = null;
            Iterator<ImageReader> imageReaders = ImageIO.getImageReadersByFormatName("PNG");
            if (imageReaders.hasNext()) {
                reader = imageReaders.next();
            } else {
                System.out.println("A PNG Reader isn't available");
                System.exit(0);

            }
            reader.setInput(ImageIO.createImageInputStream(new URL(inputImage).openStream()));
            BufferedImage bufferedImage = reader.read(0);
            /*
             * Use the ImageManager class to convert the BufferedImage into a
             * PDF XObject that can be used as the appearance of the Stamp.
             * Unlike Buttons, Stamps only have one appearance state so we only
             * need to set the "Normal" or default appearance.
             */
            PDFXObjectForm pdfXObjectForm = ImageManager.getXObjPDFImage(pdfDocument, bufferedImage, new XObjectUseOptions());
            // Create the Stamp Annotation Object.
            PDFAnnotationStamp pdfAnnotationStamp = PDFAnnotationStamp.newInstance(pdfDocument);
            PDFAppearance pdfAppearance = PDFAppearance.newInstance(pdfDocument);
            pdfAppearance.setNormalAppearance(pdfXObjectForm);
            pdfAnnotationStamp.setAppearance(pdfAppearance);
            
            /*
             * Add a Title and Content for the Stamp Pop-Up. These strings will
             * appear in the Acrobat Comments panel and when you roll over the
             * Stamp.
             */
            pdfAnnotationStamp.setTitle("Datalogics");
            pdfAnnotationStamp.setContents("Pike at the park");
            

            // Set the location of the Stamp to be centered on the page.
            double stampWidth = pdfXObjectForm.getBBox().width();
            double stampHeight = pdfXObjectForm.getBBox().height();
            double llx = (pdfPage.getCropBox().width() - stampWidth);
            double lly = (pdfPage.getCropBox().height() - stampHeight);
            pdfAnnotationStamp.setRect(llx, lly, stampWidth, stampHeight);


            // Add the Stamp Annotation to the page
            pdfPage.addAnnotation(pdfAnnotationStamp);

            // Save the file.
            ByteWriter outputFile = SampleFileServices.getRAFByteWriter(outputDir + "StampedImageOutput.pdf");
            pdfDocument.save(outputFile, PDFSaveFullOptions.newInstance());
            System.out.println("Done!");
        } finally {
            //
        }
    }

}