Example usage for com.lowagie.text.pdf PdfName RESOURCES

Introduction

In this page you can find the example usage for com.lowagie.text.pdf PdfName RESOURCES.

Prototype

PdfName RESOURCES

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Document

A name

Usage

From source file:de.offis.health.icardea.cied.pdf.extractor.PDFiText2Extractor.java

License:LGPL

public ArrayList<byte[]> getImages(int pageNumber) throws Exception {
    ArrayList<byte[]> arrayListPageImages = new ArrayList<byte[]>();

    if (pdfReader != null) {
        int numberOfPages = pdfReader.getNumberOfPages();

        if (pageNumber > 0 && pageNumber <= numberOfPages) {

            PdfDictionary pdfDictionary = pdfReader.getPageN(pageNumber);
            if (pdfDictionary != null) {
                //PdfDictionary pdfDictionaryResources = (PdfDictionary)pdfDictionary.get(PdfName.RESOURCES);
                PdfDictionary pdfDictionaryResources = (PdfDictionary) PdfReader
                        .getPdfObject(pdfDictionary.get(PdfName.RESOURCES));

                PdfDictionary pdfDictionaryXObjects = (PdfDictionary) pdfDictionaryResources
                        .get(PdfName.XOBJECT);
                if (pdfDictionaryXObjects != null) {
                    //Set myKeySet = ;
                    //pdfDictionaryXObjects.getKeys().
                    PdfName pdfObjectSubType = null;

                    for (Object pdfKeyObject : pdfDictionaryXObjects.getKeys()) {
                        PdfObject pdfObject = pdfDictionaryXObjects.get((PdfName) pdfKeyObject);

                        if (pdfObject.isIndirect()) {
                            // Eventually check if pdfObject.isDictionary()...we skipped that here
                            PdfDictionary innerPdfDictionary = (PdfDictionary) PdfReader
                                    .getPdfObject(pdfObject);
                            if (innerPdfDictionary.isStream()) {
                                extractImageFromPdfObjectExperimental(null, pageNumber, innerPdfDictionary);

                            } else {
                                //PdfName pdfObjectSubType = (PdfName)PdfReader.getPdfObject(innerPdfDictionary.get(PdfName.SUBTYPE));
                                pdfObjectSubType = (PdfName) PdfReader
                                        .getPdfObject(innerPdfDictionary.get(PdfName.SUBTYPE));

                                /* 
                                * Check if the sub-type is an "IMAGE" and
                                * then get the actual innerPdfObject for
                                * the image extraction code
                                */
                                if (PdfName.IMAGE.equals(pdfObjectSubType)) {
                                    PdfObject innerPdfObject = pdfReader
                                            .getPdfObject(pdfObject.getIndRef().getNumber());
                                    extractImageFromPdfObjectExperimental(null, pageNumber, innerPdfObject);
                                }// ww  w  .j a va 2  s  . c o  m
                            }
                        } // end if checking 'pdfObject' is indirect
                    } // end for
                } // end if checking 'XObject'
            } // end if checking 'PdfDictionary'
        } // end if checking page number 
    } else {
        // TODO: Add own exception.
        throw new Exception("There is no open PDF to work with.");
    } // end if..else

    return arrayListPageImages;
}

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From source file:questions.images.ResizeImage.java

public static void resizeImagesInPage(PdfReader reader, int page, float factor) throws IOException {
    PdfDictionary pageDictionary = reader.getPageN(page);
    PdfDictionary resources = (PdfDictionary) PdfReader.getPdfObject(pageDictionary.get(PdfName.RESOURCES));
    PdfDictionary xobjects = (PdfDictionary) PdfReader.getPdfObject(resources.get(PdfName.XOBJECT));
    if (xobjects != null) {
        for (Object xObjectKey : xobjects.getKeys()) {
            PdfName xobjectName = (PdfName) xObjectKey;
            PdfObject xobj = xobjects.get(xobjectName);
            PRStream imageStream = (PRStream) PdfReader.getPdfObject(xobj);
            PdfName subtype = (PdfName) PdfReader.getPdfObject(imageStream.get(PdfName.SUBTYPE));
            PdfName filter = (PdfName) PdfReader.getPdfObject(imageStream.get(PdfName.FILTER));
            if (PdfName.IMAGE.equals(subtype) && PdfName.DCTDECODE.equals(filter)) {
                BufferedImage src = ImageIO
                        .read(new ByteArrayInputStream(PdfReader.getStreamBytesRaw(imageStream)));
                int width = (int) (src.getWidth() * factor);
                int height = (int) (src.getHeight() * factor);
                BufferedImage dest = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                AffineTransform at = AffineTransform.getScaleInstance(factor, factor);
                Graphics2D g = dest.createGraphics();
                g.drawRenderedImage(src, at);
                ByteArrayOutputStream newImage = new ByteArrayOutputStream();
                ImageIO.write(dest, "JPG", newImage);
                imageStream.setData(newImage.toByteArray(), false, PRStream.NO_COMPRESSION);
                imageStream.put(PdfName.WIDTH, new PdfNumber(width));
                imageStream.put(PdfName.HEIGHT, new PdfNumber(height));
                imageStream.put(PdfName.FILTER, PdfName.DCTDECODE);
            }//from   ww w.  j a  va 2s  . c  om
        }
    }
}

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