Example usage for com.itextpdf.text.pdf PdfStream get

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfStream get.

Prototype

public PdfObject get(final PdfName key)

Source Link

Document

Returns the PdfObject associated to the specified key.

Usage

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

License:Apache License

/**
 * Extracts JBIG2Images from Input stream even if they are stored together with global dictionary in separate PDF object
 * doesn't work yet, its in development stage
 * @param is/*from   w  ww.  ja  v a2  s  .  c  o m*/
 * @throws PdfRecompressionException 
 * @deprecated 
 */
public void extractJbig2Images(InputStream is) throws PdfRecompressionException {
    if (is == null) {
        throw new IllegalArgumentException("InputStream not given");
    }

    PdfReader pdfReader = null;
    try {
        pdfReader = new PdfReader(is);

        for (int i = 0; i <= pdfReader.getNumberOfPages(); i++) {
            PdfDictionary d = pdfReader.getPageN(i);
            PdfIndirectReference ir = d.getAsIndirectObject(PdfName.CONTENTS);
            PdfObject o = pdfReader.getPdfObject(ir.getNumber());
            PdfStream stream = (PdfStream) o;
            PdfObject pdfsubtype = stream.get(PdfName.SUBTYPE);
            if (pdfsubtype != null && pdfsubtype.toString().equals(PdfName.IMAGE.toString())) {
                byte[] img = PdfReader.getStreamBytesRaw((PRStream) stream);
                OutputStream out = new FileOutputStream(
                        new File("pdfRecompressor", String.format("%1$05d", i) + ".jpg"));
                out.write(img);
                out.flush();
                out.close();
            }

        }

    } catch (IOException ex) {
        log.error("IOException caught while trying to extract jbig2 images from PDF", ex);
        throw new PdfRecompressionException("IOException caught while trying to extract jbig2 images from PDF",
                ex);
    } finally {
        if (pdfReader != null) {
            pdfReader.close();
        }
    }

}

From source file:org.gmdev.pdftrick.engine.CheckFiles.java

License:Open Source License

/**
 * Check the number of images contained in the file's selection, if == 0 return false.
 * @param filesVett//from  w ww. j  a va2  s.c  om
 * @param messages
 * @return TRUE if the there is at least one image in the PDF files selection.
 */
private boolean checkNumberImages(ArrayList<File> filesVett, Properties messages) {
    boolean checkNumImg = false;
    Iterator<File> ite = filesVett.iterator();
    while (ite.hasNext()) {
        File item = ite.next();
        PdfReader reader = null;
        try {
            if (namePwd.containsKey(item.getName())) {
                reader = new PdfReader(item.getPath(), namePwd.get(item.getName()).getBytes());
            } else {
                reader = new PdfReader(item.getPath());
            }
            for (int i = 0; i < reader.getXrefSize(); i++) {
                PdfObject pdfobj = reader.getPdfObject(i);
                if (pdfobj == null || !pdfobj.isStream()) {
                    continue;
                }
                PdfStream stream = (PdfStream) pdfobj;
                PdfObject pdfsubtype = stream.get(PdfName.SUBTYPE);
                if (pdfsubtype != null && pdfsubtype.toString().equals(PdfName.IMAGE.toString())) {
                    checkNumImg = true;
                    break;
                }
            }
            if (checkNumImg) {
                break;
            }
        } catch (IOException e) {
            logger.error("Exception", e);
            PdfTrickMessages.append("ERROR", Consts.SENDLOG_MSG);
        }
    }
    if (!checkNumImg) {
        PdfTrickMessages.append("WARNING", messages.getProperty("tmsg_21"));
    }
    return checkNumImg;
}

From source file:pdfextract.ExtractInfo.java

public void extractImagesInfo() {
    try {/*from  w w  w .  j  av a  2  s  .  c  o m*/
        PdfReader chartReader = new PdfReader("vv.pdf");
        for (int i = 0; i < chartReader.getXrefSize(); i++) {
            PdfObject pdfobj = chartReader.getPdfObject(i);
            if (pdfobj != null && pdfobj.isStream()) {
                PdfStream stream = (PdfStream) pdfobj;
                PdfObject pdfsubtype = stream.get(PdfName.SUBTYPE);
                //System.out.println("Stream subType: " + pdfsubtype); 
                if (pdfsubtype != null && pdfsubtype.toString().equals(PdfName.IMAGE.toString())) {
                    byte[] image = PdfReader.getStreamBytesRaw((PRStream) stream);
                    Image imageObject = Image.getInstance(image);
                    System.out.println("Resolution" + imageObject.getDpiX());
                    System.out.println("Height" + imageObject.getHeight());
                    System.out.println("Width" + imageObject.getWidth());

                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

}

From source file:pdfextract.ExtractInfo.java

public void imageNew() throws IOException {
    PdfReader reader;/*from w  ww .  j a v  a2 s . c  o  m*/

    File file = new File("vv.pdf");
    reader = new PdfReader(file.getAbsolutePath());
    for (int i = 0; i < reader.getXrefSize(); i++) {
        PdfObject pdfobj = reader.getPdfObject(i);
        if (pdfobj == null || !pdfobj.isStream()) {
            continue;
        }
        PdfStream stream = (PdfStream) pdfobj;
        PdfObject pdfsubtype = stream.get(PdfName.SUBTYPE);
        if (pdfsubtype != null && pdfsubtype.toString().equals(PdfName.IMAGE.toString())) {
            byte[] img = PdfReader.getStreamBytesRaw((PRStream) stream);
            FileOutputStream out = new FileOutputStream(
                    new File(file.getParentFile(), String.format("%1$05d", i) + ".jpg"));
            out.write(img);
            out.flush();
            out.close();
        }
    }
}