gistfile1.txt

PdfReader reader = new PdfReader(path);
Document document = new Document();
*PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));*
PdfImportedPage page = writer.getImportedPage(reader, i); 
*PdfImage img = Image.getInstance(page);*
reader.close();

https://kb.itextpdf.com/home/it5kb/faq/how-to-reuse-a-page-from-one-pdf-document-into-another-pdf-document
http://what-when-how.com/itext-5/making-images-transparent-itext-5/
http://javadox.com/com.itextpdf/itextpdf/5.5.8/com/itextpdf/text/pdf/PdfStamper.html
https://javadoc.io/doc/com.itextpdf/itextpdf/5.5.9/com/itextpdf/text/pdf/PdfStamper.html
https://www.programcreek.com/java-api-examples/?api=com.itextpdf.text.Image
https://stackoverflow.com/questions/29951821/itext-image-set-absolute-position
https://www.tutorialspoint.com/itext/itext_setting_font.htm
https://riptutorial.com/itext/example/20395/helloworldtable-java--itext-5-

gistfile2.txt

        /* ks = KeyStore.getInstance(KeyStore.getDefaultType());
        DataFolderDto dataFolder = dataFolderService.selectDataFolder(ServiceCenterConstants.NVRAM);
        String filePath = dataFolder.getDataFolderMountedPath();
        File dir = new File(filePath);
        String fileName = "ks.jks";
        File file = new File(filePath + File.separator + fileName);
        char[] pwdArray = "password".toCharArray();
        if (file.exists()) {
            ks.load(new FileInputStream(file), pwdArray);
        } else {
            ks.load(null, pwdArray);
        }
        PrivateKey key = (PrivateKey) ks.getKey("password", "password".toCharArray());
        Certificate[] chain = ks.getCertificateChain("password");*/
        // Creating the reader and the stamper
//        PdfReader reader = new PdfReader(src);
//
//        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest), '\0', true);
//
//        String fileName = rmaRecordForm.getRmaNumber() + "_" + DateUtility.formatDateForFileName(new Date()) + ".jpg";
//        String filePath = GaneshaConstants.EMPTY_STRING;
        RMACustomerSignature rmaSignature = rmaInformationLogic.findRMACustomerSignature(rmaRecordForm.getRmaNumber());
//        if (rmaSignature != null) {
//            logger.info("SIG " + rmaSignature.getFileLocation());
//            logger.info("FILENAME " + fileName);
//            Image image = Image.getInstance(rmaSignature.getFileLocation());
//            PdfImage stream = new PdfImage(image, "", null);
//            stream.put(new PdfName("ITXT_SpecialId"), new PdfName("123456789"));
//            PdfIndirectObject ref = stamper.getWriter().addToBody(stream);
//            image.setDirectReference(ref.getIndirectReference());
//            image.setAbsolutePosition(36, 400);
//            PdfContentByte over = stamper.getOverContent(1);
//            over.addImage(image);
//            stamper.close();
//            reader.close();
//        }
        //Path path = Paths.get(ClassLoader.getSystemResource("Java_logo.png").toURI());
//        PdfDocument pdfDoc =
//
//                new PdfDocument(new PdfReader(src), new PdfWriter(new Document(), new FileOutputStream(dest)));
        //Document document = new Document();
        //PdfWriter.getInstance(document, new FileOutputStream(dest));
        //document.open();
//        Image img = Image.getInstance(rmaSignature.getFileLocation());
//        img.setAbsolutePosition(80, 800);
//        pdfDoc.add(img);
//
//        pdfDoc.close();

        /*PdfStamper stamper = PdfStamper.createSignature(reader, os, '\0');
        PdfFormField field = PdfFormField.createSignature(stamper.getWriter());
        field.setFieldName(GaneshaConstants.SIGNATORY_NAME);
        // set the widget properties
        field.setWidget(new Rectangle(72, 732, 144, 780), PdfAnnotation.HIGHLIGHT_OUTLINE);
        field.setFlags(PdfAnnotation.FLAGS_PRINT);
        // add the annotation
        stamper.addAnnotation(field, 1);
        // close the stamper
        PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
        // Creating the appearance
        appearance.setVisibleSignature(GaneshaConstants.SIGNATORY_NAME);
        appearance.setReason("");
        appearance.setLocation("");


        RmaLoadHelper rmaLoad = new RmaLoadHelper();

        // Creating the appearance for layer 0
        PdfTemplate n0 = appearance.getLayer(0);
        float x = n0.getBoundingBox().getLeft();
        float y = n0.getBoundingBox().getBottom();
        float width = n0.getBoundingBox().getWidth();
        float height = n0.getBoundingBox().getHeight();
        n0.setColorFill(BaseColor.LIGHT_GRAY);
        n0.rectangle(x, y, width, height);
        n0.fill();
        // Creating the appearance for layer 2
        PdfTemplate n2 = appearance.getLayer(2);
        ColumnText ct = new ColumnText(n2);
        ct.setSimpleColumn(750,36,780,559);
        Paragraph p = new Paragraph(rmaForm.getCustomerSignatoryNameCRTD());
        ct.addElement(p);
        ct.go();

        appearance.setCrypto(privateKey, certificateChain, null,
                PdfSignatureAppearance.WINCER_SIGNED);
        appearance.setImage(Image.getInstance(rmaLoad.getSignatureImage(this, rmaForm)));
        appearance.setImageScale(-1);
        stamper.close();
          */

gistfile3.txt

https://api.itextpdf.com/iText5/java/5.5.9/com/itextpdf/text/pdf/

gistfile4.txt

 https://pastebin.com/hN6CTCRP
 String src = "input.pdf";
        String dest = "output.pdf";
 
        PdfReader reader = new PdfReader(src);
        int n = reader.getXrefSize();
        PdfObject object;
        PRStream stream;
        // Look for image and manipulate image stream
        for (int i = 0; i < n; i++) {
            object = reader.getPdfObject(i);
            if (object == null || !object.isStream())
                continue;
            stream = (PRStream) object;
            if (!PdfName.IMAGE.equals(stream.getAsName(PdfName.SUBTYPE)))
                continue;
            if (!PdfName.DCTDECODE.equals(stream.getAsName(PdfName.FILTER)))
                continue;
 
            PdfImageObject image = new PdfImageObject(stream);
            BufferedImage bi = image.getBufferedImage();
            
            double factor = .5;
 
            if (bi == null)
                continue;
            int width = (int) (bi.getWidth() * factor);
            int height = (int) (bi.getHeight() * factor);
            if (width <= 0 || height <= 0)
                continue;
            BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            AffineTransform at = AffineTransform.getScaleInstance(factor, factor);
            Graphics2D g = img.createGraphics();
            g.drawRenderedImage(bi, at);
 
            System.out.println(image.getFileType());
            ByteArrayOutputStream imgBytes = new ByteArrayOutputStream();
            ImageIO.write(img, image.getFileType(), imgBytes);
            stream.clear();
            stream.setData(imgBytes.toByteArray(), false, PRStream.NO_COMPRESSION);
            stream.put(PdfName.TYPE, PdfName.XOBJECT);
            stream.put(PdfName.SUBTYPE, PdfName.IMAGE);
            stream.put(PdfName.FILTER, PdfName.DCTDECODE);
            stream.put(PdfName.WIDTH, new PdfNumber(width));
            stream.put(PdfName.HEIGHT, new PdfNumber(height));
            stream.put(PdfName.BITSPERCOMPONENT, new PdfNumber(8));
            stream.put(PdfName.COLORSPACE, PdfName.DEVICERGB);
        }
        reader.removeUnusedObjects();
        // Save altered PDF
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
        stamper.setFullCompression();
        stamper.close();
        reader.close();
    }

gistfile5.txt

https://www.baeldung.com/java-pdf-creation

Path path = Paths.get(ClassLoader.getSystemResource("Java_logo.png").toURI());

Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream("iTextImageExample.pdf"));
document.open();
Image img = Image.getInstance(path.toAbsolutePath().toString());
document.add(img);

document.close();