Example usage for com.itextpdf.text.pdf PdfName JBIG2GLOBALS

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfName JBIG2GLOBALS.

Prototype

PdfName JBIG2GLOBALS

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Document

A name

Usage

From source file:org.gmdev.pdftrick.utils.CustomExtraImgReader.java

License:Open Source License

/**
 * Tead a JBIG2 image and give a BufferedImage
 * @param image//from  w  w w. java2s.c o m
 * @return The BufferedImage obj
 */
public static BufferedImage readJBIG2(PdfImageObject image) {
    BufferedImage buffImg = null;

    PdfDictionary dic = image.getDictionary();
    PdfDictionary decodedic = dic.getAsDict(PdfName.DECODEPARMS);
    PdfStream globalStream = decodedic.getAsStream(PdfName.JBIG2GLOBALS);

    try {
        byte[] byteArrayGlobal = PdfReader.getStreamBytes((PRStream) globalStream);

        InputStream in = new ByteArrayInputStream(image.getImageAsBytes());
        ImageInputStream stream = ImageIO.createImageInputStream(in);

        InputStream inG = new ByteArrayInputStream(byteArrayGlobal);
        ImageInputStream streamG = ImageIO.createImageInputStream(inG);

        JBIG2ImageReader reader = new JBIG2ImageReader(new JBIG2ImageReaderSpi());
        reader.setInput(stream);
        JBIG2Globals globals = reader.processGlobals(streamG);
        reader.setGlobals(globals);
        ImageReadParam param = reader.getDefaultReadParam();
        buffImg = reader.read(0, param);

        in.close();
        inG.close();

    } catch (Exception e) {
        logger.error("Exception", e);
        PdfTrickMessages.append("ERROR", Consts.SENDLOG_MSG);
    }
    return buffImg;
}

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