Example usage for com.itextpdf.text.pdf PdfName FILTER

List of usage examples for com.itextpdf.text.pdf PdfName FILTER

  1. HOME
  2. Java
  3. com.itextpdf
  4. com.itextpdf.text.pdf.*
  5. PdfName
  6. FILTER

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfName FILTER.

Prototype

PdfName FILTER

To view the source code for com.itextpdf.text.pdf PdfName FILTER.

Click Source Link

Document

A name

Usage

From source file:cz.muni.pdfjbim.PdfImageExtractor.java

License:Apache License

private List<Image> getImagesFromPdfDict(PdfDictionary dict, PdfReader doc) throws IOException {
    List<Image> images = new ArrayList<Image>();
    PdfDictionary res = (PdfDictionary) (PdfReader.getPdfObject(dict.get(PdfName.RESOURCES)));
    PdfDictionary xobj = (PdfDictionary) (PdfReader.getPdfObject(res.get(PdfName.XOBJECT)));

    if (xobj != null) {
        for (PdfName name : xobj.getKeys()) {
            PdfObject obj = xobj.get(name);
            if (obj.isIndirect()) {
                PdfDictionary tg = (PdfDictionary) (PdfReader.getPdfObject(obj));
                PdfName subtype = (PdfName) (PdfReader.getPdfObject(tg.get(PdfName.SUBTYPE)));
                if (PdfName.IMAGE.equals(subtype)) {
                    int xrefIdx = ((PRIndirectReference) obj).getNumber();
                    PdfObject pdfObj = doc.getPdfObject(xrefIdx);
                    PdfStream str = (PdfStream) (pdfObj);
                    byte[] bytes = PdfReader.getStreamBytesRaw((PRStream) str);

                    String filter = tg.get(PdfName.FILTER).toString();
                    String width = tg.get(PdfName.WIDTH).toString();
                    String height = tg.get(PdfName.HEIGHT).toString();
                    String bpp = tg.get(PdfName.BITSPERCOMPONENT).toString();

                    if ("/FlateDecode".equals(filter)) {
                        bytes = PdfReader.FlateDecode(bytes, true);
                        try {
                            images.add(Image.getInstance(bytes));
                        } catch (BadElementException ex) {
                            log.warn("problem to process FlatDecoded Image", ex);
                        }/*  ww  w .java 2s  .  com*/
                    } else if (PdfName.FORM.equals(subtype) || PdfName.GROUP.equals(subtype)) {
                        images.addAll(getImagesFromPdfDict(tg, doc));
                    }
                }
            }
        }
    }
    return images;
}

From source file:org.h819.commons.file.MyPDFUtils.java

/**
 *  pdf ? pdf/*from  w w  w .j a v a2s .  com*/
 *
 * @param srcPdf      the original PDF
 * @param destPdf     the resulting PDF
 * @param imageFactor The multiplication factor for the image (?  imageFacto =0.5f)
 * @throws IOException
 * @throws DocumentException
 */
public static void compressPdf(File srcPdf, File destPdf, float imageFactor)
        throws IOException, DocumentException {

    PdfReader reader = new PdfReader(srcPdf.getAbsolutePath());
    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();
        if (bi == null)
            continue;
        int width = (int) (bi.getWidth() * imageFactor);
        int height = (int) (bi.getHeight() * imageFactor);
        if (width <= 0 || height <= 0)
            continue;
        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        AffineTransform at = AffineTransform.getScaleInstance(imageFactor, imageFactor);
        Graphics2D g = img.createGraphics();
        g.drawRenderedImage(bi, at);
        ByteArrayOutputStream imgBytes = new ByteArrayOutputStream();
        ImageIO.write(img, "JPG", 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(destPdf.getAbsolutePath()));
    stamper.setFullCompression();
    stamper.close();
    reader.close();
}

From source file:org.roda.common.certification.PDFSignatureUtils.java

private static StringBuilder getExtractionInformation(AcroFields fields, ArrayList<?> names,
        Path outputContents, String filename) throws IOException {

    StringBuilder sb = new StringBuilder();

    for (int i = 0; i < names.size(); i++) {
        String name = (String) names.get(i);
        Item item = fields.getFieldItem(name);

        PdfDictionary widget = item.getWidget(0);
        PdfDictionary infoDictionary = widget.getAsDict(PdfName.V);
        sb.append("<signature>\n");

        try {//from   ww  w .  j  a  va2  s.c om
            PdfPKCS7 pk = fields.verifySignature(name);
            sb = addElementToExtractionResult(sb, "name", name);
            sb = addElementToExtractionResult(sb, "sign-name", pk.getSignName());
            sb = addElementToExtractionResult(sb, "version", Integer.toString(pk.getVersion()));
            sb = addElementToExtractionResult(sb, "reason", pk.getReason());
            sb = addElementToExtractionResult(sb, "location", pk.getLocation());

            SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy");

            if (pk.getTimeStampDate() != null) {
                String timestamp = formatter.format(pk.getTimeStampDate().getTime());
                sb = addElementToExtractionResult(sb, "timestamp-time", timestamp);
            }

            if (pk.getSignDate() != null) {
                String sign = formatter.format(pk.getSignDate().getTime());
                sb = addElementToExtractionResult(sb, "sign-time", sign);
            }

            sb = addElementToExtractionResult(sb, "digest-algorithm", pk.getDigestAlgorithm());
            sb = addElementToExtractionResult(sb, "hash-algorithm", pk.getHashAlgorithm());
            sb = addElementToExtractionResult(sb, "covers-whole-document",
                    Boolean.toString(fields.signatureCoversWholeDocument(name)));
            sb = addElementToExtractionResult(sb, "ft", widget.get(PdfName.FT).toString());

            if (infoDictionary.contains(PdfName.CONTACTINFO))
                sb = addElementToExtractionResult(sb, "contact-info",
                        infoDictionary.getAsString(PdfName.CONTACTINFO).toString());

            if (infoDictionary.contains(PdfName.FILTER))
                sb = addElementToExtractionResult(sb, "filter", infoDictionary.get(PdfName.FILTER).toString());

            if (infoDictionary.contains(PdfName.SUBFILTER))
                sb = addElementToExtractionResult(sb, "subfilter",
                        infoDictionary.get(PdfName.SUBFILTER).toString());

            if (infoDictionary.contains(PdfName.LOCK))
                sb = addElementToExtractionResult(sb, "lock", "true");

            if (infoDictionary.contains(PdfName.CONTENTS)) {
                PdfString elementName = infoDictionary.getAsString(PdfName.CONTENTS);
                Files.write(outputContents, elementName.toUnicodeString().getBytes());
                sb = addElementToExtractionResult(sb, "contents", filename + ".pkcs7");
            }

        } catch (NoSuchFieldError e) {
            LOGGER.warn("DS information extraction did not execute properly");
        }

        sb.append("</signature>");
    }

    return sb;
}

From source file:org.roda.core.plugins.plugins.characterization.PDFSignatureUtils.java

private static StringBuilder getExtractionInformation(AcroFields fields, ArrayList<?> names,
        Path outputContents, String filename) throws IOException {
    StringBuilder sb = new StringBuilder();

    for (int i = 0; i < names.size(); i++) {
        String name = (String) names.get(i);
        Item item = fields.getFieldItem(name);

        PdfDictionary widget = item.getWidget(0);
        PdfDictionary infoDictionary = widget.getAsDict(PdfName.V);
        sb.append("<signature>\n");

        try {//from  w  w  w . j a va  2s .c o m
            PdfPKCS7 pk = fields.verifySignature(name);
            sb = addElementToExtractionResult(sb, "name", name);
            sb = addElementToExtractionResult(sb, "sign-name", pk.getSignName());
            sb = addElementToExtractionResult(sb, "version", Integer.toString(pk.getVersion()));
            sb = addElementToExtractionResult(sb, "reason", pk.getReason());
            sb = addElementToExtractionResult(sb, "location", pk.getLocation());

            SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy");

            if (pk.getTimeStampDate() != null) {
                String timestamp = formatter.format(pk.getTimeStampDate().getTime());
                sb = addElementToExtractionResult(sb, "timestamp-time", timestamp);
            }

            if (pk.getSignDate() != null) {
                String sign = formatter.format(pk.getSignDate().getTime());
                sb = addElementToExtractionResult(sb, "sign-time", sign);
            }

            sb = addElementToExtractionResult(sb, "digest-algorithm", pk.getDigestAlgorithm());
            sb = addElementToExtractionResult(sb, "hash-algorithm", pk.getHashAlgorithm());
            sb = addElementToExtractionResult(sb, "covers-whole-document",
                    Boolean.toString(fields.signatureCoversWholeDocument(name)));
            sb = addElementToExtractionResult(sb, "ft", widget.get(PdfName.FT).toString());

            if (infoDictionary.contains(PdfName.CONTACTINFO))
                sb = addElementToExtractionResult(sb, "contact-info",
                        infoDictionary.getAsString(PdfName.CONTACTINFO).toString());

            if (infoDictionary.contains(PdfName.FILTER))
                sb = addElementToExtractionResult(sb, "filter", infoDictionary.get(PdfName.FILTER).toString());

            if (infoDictionary.contains(PdfName.SUBFILTER))
                sb = addElementToExtractionResult(sb, "subfilter",
                        infoDictionary.get(PdfName.SUBFILTER).toString());

            if (infoDictionary.contains(PdfName.LOCK))
                sb = addElementToExtractionResult(sb, "lock", "true");

            if (infoDictionary.contains(PdfName.CONTENTS)) {
                PdfString elementName = infoDictionary.getAsString(PdfName.CONTENTS);
                Files.write(outputContents, elementName.toUnicodeString().getBytes());
                sb = addElementToExtractionResult(sb, "contents", filename + ".pkcs7");
            }

        } catch (NoSuchFieldError e) {
            LOGGER.warn("DS information extraction did not execute properly");
        }

        sb.append("</signature>");
    }

    return sb;
}