Example usage for com.itextpdf.text.pdf PdfObject isStream

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfObject isStream.

Prototype

public boolean isStream() 

Source Link

Document

Checks if this PdfObject is of the type PdfStream.

Usage

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   ww w  . ja  v  a2s .  co m*/
 * @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;
}

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

/**
 *  pdf ? pdf/*  ww  w  .ja  v a 2s . c o m*/
 *
 * @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();
}

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From source file:pdfextract.ExtractInfo.java

public void extractImagesInfo() {
    try {//from  w ww . java2 s .  co  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();
    }

}

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From source file:pdfextract.ExtractInfo.java

public void imageNew() throws IOException {
    PdfReader reader;// w  w w. j  av  a 2s  .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();
        }
    }
}

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