Java PDFPage.getImage方法代码示例

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
@Override
public void run() {
	Dimension size = null;
	Rectangle2D clip = null;

	if (fspp != null) {
		fspp.waitForCurrentPage();
		size = fspp.getCurSize();
		clip = fspp.getCurClip();
	} else if (page != null) {
		page.waitForCurrentPage();
		size = page.getCurSize();
		clip = page.getCurClip();
	}
	if (waitforPage == curpage) {
		PDFPage pdfPage = curFile.getPage(prepPage + 1, true);
		if (pdfPage != null && waitforPage == curpage) {
			pdfPage.getImage(size.width, size.height, clip, null, true, true);
		}
	}
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public static Image readPDF(File f) {
	try {
		RandomAccessFile raf = new RandomAccessFile(f, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdf = new PDFFile(buf);
		PDFPage page = pdf.getPage(0);
		Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(), (int) page.getBBox().getHeight());
		Image image = page.getImage(rect.width, rect.height, rect, null, true, true);
		raf.close();
		return image;
	} catch (Exception e) {
		e.printStackTrace();
		return null;
	}
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
private void showCurrentPage() {
    this.posLabel.setText(this.currentPage + " / " + this.pdfFile.getNumPages());

    final PDFPage page = this.pdfFile.getPage(this.currentPage);

    final Rectangle2D r2d = page.getBBox();
    double width = r2d.getWidth();
    double height = r2d.getHeight();
    width /= 72.0;
    height /= 72.0;
    final int res = Toolkit.getDefaultToolkit().getScreenResolution();
    width *= res;
    height *= res;

    final Image image = page.getImage((int) width, (int) height, r2d, null, true, true);
    final ImageIcon icon = new ImageIcon(image);
    this.contentLabel.setIcon(icon);
    this.validate();

    this.contentLabel.scrollRectToVisible(
            new Rectangle(icon.getIconWidth() / 4, icon.getIconHeight() / 4, 1, 1));
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
/**
 * create the image to load
 **/
private Image getPageFromDisk(int pageNum) {
	PDFPage page = pdfFile.getPage(pageNum + 1);
	Rectangle2D r2d = page.getBBox();
	imageWidth = r2d.getWidth();
	imageHeight = r2d.getHeight();
	imageWidth /= PAGE_DIMENSION_RATIO;
	imageHeight /= PAGE_DIMENSION_RATIO;
	int res = Toolkit.getDefaultToolkit().getScreenResolution();
	imageWidth *= res;
	imageHeight *= res;
	return page.getImage((int) imageWidth, (int) imageHeight, r2d, null,
			true, true);
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
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;
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public File createCacheVersion(Document d) throws Exception {

		String docdownload = oscar.OscarProperties.getInstance().getProperty("DOCUMENT_DIR");
		File documentDir = new File(docdownload);
		File documentCacheDir = getDocumentCacheDir(docdownload);
		log.debug("Document Dir is a dir" + documentDir.isDirectory());

		File file = new File(documentDir, d.getDocfilename());

		RandomAccessFile raf = new RandomAccessFile(file, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdffile = new PDFFile(buf);
		if(raf != null) raf.close();
		if(channel != null) channel.close();
		// long readfile = System.currentTimeMillis() - start;
		// draw the first page to an image
		PDFPage ppage = pdffile.getPage(0);

		log.debug("WIDTH " + (int) ppage.getBBox().getWidth() + " height " + (int) ppage.getBBox().getHeight());

		// get the width and height for the doc at the default zoom
		Rectangle rect = new Rectangle(0, 0, (int) ppage.getBBox().getWidth(), (int) ppage.getBBox().getHeight());

		log.debug("generate the image");
		Image img = ppage.getImage(rect.width, rect.height, // width & height
		        rect, // clip rect
		        null, // null for the ImageObserver
		        true, // fill background with white
		        true // block until drawing is done
		        );

		log.debug("about to Print to stream");
		File outfile = new File(documentCacheDir, d.getDocfilename() + ".png");

		OutputStream outs = null;
		try {
			outs = new FileOutputStream(outfile);

			RenderedImage rendImage = (RenderedImage) img;
			ImageIO.write(rendImage, "png", outs);
			outs.flush();
		} finally {
			if (outs != null) outs.close();
		}

		return outfile;

	}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public ActionForward view2(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

		if(!securityInfoManager.hasPrivilege(LoggedInInfo.getLoggedInInfoFromSession(request), "_edoc", "r", null)) {
        	throw new SecurityException("missing required security object (_edoc)");
        }
		
		String doc_no = request.getParameter("doc_no");
		log.debug("Document No :" + doc_no);

		LogAction.addLog((String) request.getSession().getAttribute("user"), LogConst.READ, LogConst.CON_DOCUMENT, doc_no, request.getRemoteAddr());

		String docdownload = oscar.OscarProperties.getInstance().getProperty("DOCUMENT_DIR");
		File documentDir = new File(docdownload);
		log.debug("Document Dir is a dir" + documentDir.isDirectory());

		Document d = documentDao.getDocument(doc_no);
		log.debug("Document Name :" + d.getDocfilename());

		// TODO: Right now this assumes it's a pdf which it shouldn't

		response.setContentType("image/png");
		// response.setHeader("Content-Disposition", "attachment;filename=\"" + filename+ "\"");
		// read the file name.
		File file = new File(documentDir, d.getDocfilename());

		RandomAccessFile raf = new RandomAccessFile(file, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdffile = new PDFFile(buf);
		// long readfile = System.currentTimeMillis() - start;
		// draw the first page to an image
		PDFPage ppage = pdffile.getPage(0);

		log.debug("WIDTH " + (int) ppage.getBBox().getWidth() + " height " + (int) ppage.getBBox().getHeight());

		// get the width and height for the doc at the default zoom
		Rectangle rect = new Rectangle(0, 0, (int) ppage.getBBox().getWidth(), (int) ppage.getBBox().getHeight());

		log.debug("generate the image");
		Image img = ppage.getImage(rect.width, rect.height, // width & height
		        rect, // clip rect
		        null, // null for the ImageObserver
		        true, // fill background with white
		        true // block until drawing is done
		        );

		log.debug("about to Print to stream");
		ServletOutputStream outs = response.getOutputStream();

		RenderedImage rendImage = (RenderedImage) img;
		ImageIO.write(rendImage, "png", outs);
		outs.flush();
		outs.close();
		return null;
	}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
/**
 * Generate images.
 *
 * @param file
 *            the file
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
private void generateImages(File file) throws IOException
{

	contentFactory = stage.getContentFactory();

	// load a pdf from a byte buffer
	RandomAccessFile raf = new RandomAccessFile(file, "r");
	FileChannel channel = raf.getChannel();
	ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
	PDFFile pdffile = new PDFFile(buf);

	int numPgs = pdffile.getNumPages();

	ArrayList<IImage> images = new ArrayList<IImage>();

	for (int i = 0; i < numPgs; i++)
	{

		String pdfName = file.getName();
		String imageName = pdfName + i;

		if (convertedPages.containsKey(imageName))
		{
			images.add(generateImage(imageName, convertedPages.get(imageName), (int) pdfSizes.get(pdfName).getX(), (int) pdfSizes.get(pdfName).getY()));
			pdfDimensions = pdfSizes.get(pdfName);
		}
		else
		{

			// draw the page to an image
			PDFPage page = pdffile.getPage(i);

			// get the width and height for the doc at the default zoom
			Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(), (int) page.getBBox().getHeight());

			double pw = page.getWidth() * 2;
			double ph = page.getHeight() * 2;

			// generate the image
			Image img = page.getImage((int) pw, (int) ph, rect, null, true, true);

			if (!pdfSizes.containsKey(pdfName))
			{
				Vector2f dimensions = new Vector2f((int) pw, (int) ph);
				pdfDimensions = dimensions;
				pdfSizes.put(pdfName, dimensions);
			}

			// save it as a file
			BufferedImage bImg = toBufferedImage(img, (int) pw, (int) ph);

			File imageFile = File.createTempFile(imageName, ".png");
			imageFile.deleteOnExit();
			ImageIO.write(bImg, "png", imageFile);

			images.add(generateImage(imageName, imageFile, (int) pw, (int) ph));
		}
	}
	raf.close();
	generatePDFViewer(file.getName(), images);

}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public static void convertToIMG(String pathpdf,String output,int s) {

File file = new File(pathpdf);
RandomAccessFile raf;
try {
	raf = new RandomAccessFile(file, "r");

	FileChannel channel = raf.getChannel();
	ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
	PDFFile pdffile = new PDFFile(buf);
	// draw the first page to an image
	int num=pdffile.getNumPages();
	for(int i=0;i<num;i++)
	{
		PDFPage page = pdffile.getPage(i);
		
		//get the width and height for the doc at the default zoom				
		int width=(int)page.getBBox().getWidth();
		int height=(int)page.getBBox().getHeight();				
		
		Rectangle rect = new Rectangle(0,0,width,height);
		int rotation=page.getRotation();
		Rectangle rect1=rect;
		if(rotation==90 || rotation==270)
			rect1=new Rectangle(0,0,rect.height,rect.width);
		
		//generate the image
		BufferedImage img = (BufferedImage)page.getImage(
					rect.width, rect.height, //width & height
					rect1, // clip rect
					null, // null for the ImageObserver
					true, // fill background with white
					true  // block until drawing is done
			);
                             
		ImageIO.write(img, "png", new File(output+(i+1)+".png"));
                              s=2;
	}
} 
catch (FileNotFoundException e1) {
	System.err.println(e1.getLocalizedMessage());
} catch (IOException e) {
	System.err.println(e.getLocalizedMessage());
}
              if(s==1||s==2){
                  JOptionPane.showMessageDialog(null,"Converted Successfully");
       //JOptionPane.showMessageDialog(null, "Finished\nFile save in :\n"+output.substring(0,output.lastIndexOf("\\")));
              }
              //if(s==2){
       //JOptionPane.showMessageDialog(null, "Finished\nFile save in :\n"+output.substring(0,output.lastIndexOf("\\")));
              //}
  }
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public  void convertToIMG(String pathpdf,String output,int s) {

File file = new File(pathpdf);
RandomAccessFile raf;
try {
	raf = new RandomAccessFile(file, "r");

	FileChannel channel = raf.getChannel();
	ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
	PDFFile pdffile = new PDFFile(buf);
	// draw the first page to an image
	int num=pdffile.getNumPages();
	for(int i=0;i<num;i++)
	{
		PDFPage page = pdffile.getPage(i);
		
		//get the width and height for the doc at the default zoom				
		int width=(int)page.getBBox().getWidth();
		int height=(int)page.getBBox().getHeight();				
		
		Rectangle rect = new Rectangle(0,0,width,height);
		int rotation=page.getRotation();
		Rectangle rect1=rect;
		if(rotation==90 || rotation==270)
			rect1=new Rectangle(0,0,rect.height,rect.width);
		
		//generate the image
		BufferedImage img = (BufferedImage)page.getImage(
					rect.width, rect.height, //width & height
					rect1, // clip rect
					null, // null for the ImageObserver
					true, // fill background with white
					true  // block until drawing is done
			);
                             
		ImageIO.write(img, "png", new File(output+(i+1)+".png"));
	}
} 
catch (FileNotFoundException e1) {
	System.err.println(e1.getLocalizedMessage());
} catch (IOException e) {
	System.err.println(e.getLocalizedMessage());
}
  }
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public void PdfToIMG(String pathpdf,String output) {

File file = new File(pathpdf);
RandomAccessFile raf;
try {
	raf = new RandomAccessFile(file, "r");

	FileChannel channel = raf.getChannel();
	ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
	PDFFile pdffile = new PDFFile(buf);
	// draw the first page to an image
	int num=pdffile.getNumPages();
	for(int i=0;i<num;i++)
	{
		PDFPage page = pdffile.getPage(i);
		
		//get the width and height for the doc at the default zoom				
		int width=(int)page.getBBox().getWidth();
		int height=(int)page.getBBox().getHeight();				
		
		Rectangle rect = new Rectangle(0,0,width,height);
		int rotation=page.getRotation();
		Rectangle rect1=rect;
		if(rotation==90 || rotation==270)
			rect1=new Rectangle(0,0,rect.height,rect.width);
		
		//generate the image
		BufferedImage img = (BufferedImage)page.getImage(
					rect.width, rect.height, //width & height
					rect1, // clip rect
					null, // null for the ImageObserver
					true, // fill background with white
					true  // block until drawing is done
			);
                             
		ImageIO.write(img, "png", new File(output+(i+1)+".png"));
	}
} 
catch (FileNotFoundException e1) {
	System.err.println(e1.getLocalizedMessage());
} catch (IOException e) {
	System.err.println(e.getLocalizedMessage());
}
  }
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public byte[] extract() throws IOException {
    this.extracted = false;
    this.preview = null;
    
    File file = new File(this.filename);
    RandomAccessFile raf = new RandomAccessFile(file, "r");
    FileChannel channel = raf.getChannel();
    ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
    PDFFile pdffile = new PDFFile(buf);

    // getPage is zero-based
    PDFPage page = pdffile.getPage(this.page - 1);

    // Get get the width and height for the doc at the default zoom 
    Rectangle r = new Rectangle(0, 0,
            (int) page.getBBox().getWidth(),
            (int) page.getBBox().getHeight());
    
    this.width = r.width;
    this.height = r.height;

    // Generate the preview (using the original size)
    Image img = page.getImage(this.width, this.height, r, null, true, true);
    
    // Output generate preview to byte array
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    IOException throwEx = null;
    try {
        ImageIO.write((RenderedImage)img, "png", baos);
        baos.flush();
        this.preview = baos.toByteArray();
        this.extracted = true;
    } catch (IOException ex) {
        this.preview = null;
        this.extracted = false;
        throwEx = ex;
    } finally {
        baos.close();
        if (throwEx != null) {
            throw throwEx;
        }
    }
    
    return this.preview;
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
/**
 * Renders each of the pages in the PDFFile into a thumbnail. Preferentially
 * works on the needdrawn thumbnail, otherwise, go in order.
 */
@Override
public void run() {
	int workingon = 0; // the thumbnail we'll be rendering next.

	while (anim == Thread.currentThread()) {

		if (needdrawn >= 0) {
			workingon = needdrawn;
			needdrawn = -1;
		}

		// find an unfinished page
		int loop;
		for (loop = images.length; loop > 0; loop--) {
			if (images[workingon] == null) {
				break;
			}
			workingon++;
			if (workingon >= images.length) {
				workingon = 0;
			}
		}
		if (loop == 0) {
			// done all pages.
			break;
		}

		// build the page
		try {
			int pagetoread = workingon + 1;
			PDFPage p = file.getPage(pagetoread, true);
			int wid = (int) Math.ceil((lineheight - border) * p.getAspectRatio());
			int pagetowrite = workingon;

			Image i = p.getImage(wid, lineheight - border, null, this, true, true);
			images[pagetowrite] = i;

			if (defaultNotSet) {
				defaultNotSet = false;
				setDefaultWidth(wid);
			}
			repaint();
		} catch (Exception e) {
			logger.log(Level.ERROR, e);

			int size = lineheight - border;
			images[workingon] = new BufferedImage(size, size, BufferedImage.TYPE_BYTE_BINARY);
		}
	}
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
/**
 * Stop the generation of any previous page, and draw the new one.
 *
 * @param page
 *            the PDFPage to draw.
 */
public synchronized void showPage(PDFPage page) {
	// stop drawing the previous page
	if (currentPage != null && prevSize != null) {
		currentPage.stop(prevSize.width, prevSize.height, prevClip);
	}

	// set up the new page
	currentPage = page;

	if (page == null) {
		// no page
		currentImage = null;
		clip = null;
		currentXform = null;
		repaint();
	} else {
		// start drawing -- clear the flag to indicate we're in progress.
		flag.clear();

		Dimension sz = getSize();
		if (sz.width + sz.height == 0) {
			// no image to draw.
			return;
		}

		// calculate the clipping rectangle in page space from the
		// desired clip in screen space.
		Rectangle2D useClip = clip;
		if (clip != null && currentXform != null) {
			useClip = currentXform.createTransformedShape(clip).getBounds2D();
		}

		Dimension pageSize = page.getUnstretchedSize(sz.width, sz.height, useClip);

		// get the new image
		currentImage = page.getImage(pageSize.width, pageSize.height, useClip, this);

		// calculate the transform from screen to page space
		currentXform = page.getInitialTransform(pageSize.width, pageSize.height, useClip);
		try {
			currentXform = currentXform.createInverse();
		} catch (NoninvertibleTransformException nte) {
			logger.log(Level.ERROR, nte);
		}

		prevClip = useClip;
		prevSize = pageSize;

		repaint();
	}
}
 

import com.sun.pdfview.PDFPage; //导入方法依赖的package包/类
public File createCacheVersion(Document d, int pageNum) throws Exception{

		File documentCacheDir = new File(EDocUtil.getCacheDirectory());
		File file =  new File(EDocUtil.getDocumentPath(d.getDocfilename()));

		RandomAccessFile raf = new RandomAccessFile(file, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdffile = new PDFFile(buf);
		if(raf != null) raf.close();
		if(channel != null) channel.close();
		// draw the first page to an image
		PDFPage ppage = pdffile.getPage(pageNum);

		log.debug("WIDTH " + (int) ppage.getBBox().getWidth() + " height " + (int) ppage.getBBox().getHeight());

		// get the width and height for the doc at the default zoom
		Rectangle rect = new Rectangle(0, 0, (int) ppage.getBBox().getWidth(), (int) ppage.getBBox().getHeight());

		log.debug("generate the image");
		Image img = ppage.getImage(rect.width, rect.height, // width & height
		        rect, // clip rect
		        null, // null for the ImageObserver
		        true, // fill background with white
		        true // block until drawing is done
		        );
		
		log.debug("about to Print to stream");
		File outfile = new File(documentCacheDir, d.getDocfilename() + "_" + pageNum + ".png");

		OutputStream outs = null;
		try {
			outs = new FileOutputStream(outfile);

			RenderedImage rendImage = (RenderedImage) img;
			ImageIO.write(rendImage, "png", outs);
			outs.flush();
		} finally {
			if (outs != null) outs.close();
		}
		return outfile;

	}