public static List<BufferedImage> readPdfAsImages(File pdfFile) {
	try {
		RandomAccessFile raf = new RandomAccessFile(pdfFile, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdf = new PDFFile(buf);

		List<BufferedImage> images = new ArrayList<BufferedImage>();
		for (int pageNumber = 1; pageNumber <= pdf.getNumPages(); ++pageNumber) {
			images.add(readPage(pdf, pageNumber));
		}

		raf.close();
		return images;
	}
	catch (IOException e) {
		throw new RuntimeException(e);
	}
}
 

/**
 * 
 * @param pdfFile
 *          Path to the pdf file.
 * @param pageNumber
 *          One-based page number to read
 * @return
 */
public static BufferedImage readPdfPageAsImage(File pdfFile, int pageNumber) {
	if (pageNumber < 1)
		throw new RuntimeException("page numbering starts with 1; '" + pageNumber + "' given");
	try {
		RandomAccessFile raf = new RandomAccessFile(pdfFile, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdf = new PDFFile(buf);
		BufferedImage image = readPage(pdf, pageNumber);
		raf.close();
		return image;
	}
	catch (IOException e) {
		throw new RuntimeException(e);
	}
}
 

public static int numPagesInPdf(File pdfFile) {
	try {
		RandomAccessFile raf = new RandomAccessFile(pdfFile, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdf = new PDFFile(buf);
		int numPages = pdf.getNumPages();
		raf.close();
		return numPages;
	}
	catch (IOException e) {
		throw new RuntimeException(e);
	}
}
 

private static BufferedImage readPage(PDFFile pdf, int pageNumber) {
	double scale = 2.5; // because otherwise the image comes out really tiny
	PDFPage page = pdf.getPage(pageNumber);
	Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(), (int) page.getBBox().getHeight());
	BufferedImage bufferedImage = new BufferedImage((int)(rect.width * scale), (int)(rect.height * scale), BufferedImage.TYPE_INT_RGB);
	Image image = page.getImage((int)(rect.width * scale), (int)(rect.height * scale), rect, null, true, true);
	Graphics2D bufImageGraphics = bufferedImage.createGraphics();
	bufImageGraphics.drawImage(image, 0, 0, null);
	return bufferedImage;
}
 

private void initialize() throws FileNotFoundException, IOException, MalformedURLException, URISyntaxException, Exception {
    
    pdfPanel.addMouseListener(actionListener);
    pdfPanel.addMouseMotionListener(actionListener);
    pdfPanel.addKeyListener(actionListener);
    pdfPanel.setComponentPopupMenu(menu);
    
    byte[] pdfBytes = null;
    if(DataURL.isDataURL(source)) {
        pdfBytes = new DataURL(source).getData();
    }
    else {
        URL sourceURL = new URL(source);
        if("file".equalsIgnoreCase(sourceURL.getProtocol())) {
            pdfBytes = Files.getByteArray(new File(sourceURL.toURI()));
        }
        else {
            pdfBytes = IObox.fetchUrl(sourceURL);
        }
    }
    
    if(pdfBytes != null) {
        pdfFile = new PDFFile(ByteBuffer.wrap(pdfBytes));
        if(pdfFile != null) {
            pageCount = pdfFile.getNumPages();
            if(pageCount > 0) {
                setPageText.invoke(1, pageCount);
                pdfPanel.changePage(pdfFile.getPage(0));
            }
            else {
                throw new Exception("PDF has no pages at all. Can't view.");
            }          
        }
    }
    else {
        throw new Exception("Can't read data out of locator resource.");
    }
}