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The second parameter in the getInstance() method is null in this example. In section 10.3.1, you ll learn that you can pass a java.awt.Color object. This color will replace the transparent color when the com.itextpdf.text.Image is added to the document. One of the possible reasons why you d prefer using java.awt.Image is to reduce the quality of an image so that the resulting file size is significantly lower.

The different compression algorithms are listed in table 10.2, but it s important to realize that iText doesn t reduce the quality of an image. If you create an Image with a high-quality image, the image will be added to the PDF at the same quality. If you change the width and the height of the image, the resolution will change, but the number of pixels will remain the same.

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public class EnterpriseServletExample extends HttpServlet { public void service (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println( "Accepting data from a J2ME client. IP="+request.getRemoteAddr()); System.out.println("Request Method...:"+request.getMethod()); printParameterInfo(request); printHeaderInfo(request); printCookieInfo(request); processCounter(request); String data = processDataInput(request); String responseString = "Echo \"" + data + "\" sent via " + request.getMethod(); processResponse(response, responseString); } private void printParameterInfo(HttpServletRequest request){ System.out.println("Parameter Info:"); Enumeration e = request.getParameterNames(); while (e.hasMoreElements()){ String name = (String)e.nextElement(); System.out.println(" Parameter........:"+name+"="+request.getParameter(name)); } } Print HTTP parameters private void printHeaderInfo(HttpServletRequest request){ System.out.println("Header Info:"); Enumeration e = request.getHeaderNames(); while (e.hasMoreElements()){ String name = (String)e.nextElement(); System.out.println(" Header...........:"+name+"="+request.getHeader(name)); } Print HTTP header } private void printCookieInfo(HttpServletRequest request){ System.out.println("Cookies:"); Cookie[] cookies = request.getCookies(); for (int ccnt=0; ccnt < cookies.length; ccnt++){ System.out.println( Print cookie " cookie...........:"+cookies[ccnt]); information

You can try to reduce the size of an image that is flate-compressed by changing the compression level.

System.out.println( " cookie name......:"+cookies[ccnt].getName()); System.out.println( " cookie value.....:"+cookies[ccnt].getValue()); System.out.println( " cookie max age...:"+cookies[ccnt].getMaxAge()); } }

Image img = Image.getInstance(RESOURCE); img.setCompressionLevel(9); document.add(img);

Word s Bookmark feature is a handy way to mark specific parts of your document. It enables you to return quickly to a marked location, rather than scroll through pages and pages of your document. To insert a bookmark in your document, position the cursor at the location you would like to mark and click Insert Bookmark, or you may use the Ctrl+Shift+F5 keyboard shortcut. In the Bookmark dialog box, shown in Figure 10-1, type a name for the bookmark. Click Add.

private void processCounter(HttpServletRequest request){ HttpSession session = request.getSession(true); Integer sessionCounter = null; int tempCounter = 0; Object obj = session.getAttribute("hit_counter"); if (obj == null){ sessionCounter = new Integer(1); } else{ sessionCounter = (Integer)obj; Increment } the counter tempCounter = sessionCounter.intValue(); System.out.println("Hit Counter........:"+tempCounter); tempCounter++; sessionCounter = new Integer(tempCounter); session.setAttribute("hit_counter", sessionCounter); } private String processDataInput(HttpServletRequest request) throws IOException { int len = request.getContentLength()+2; String s = ""; System.out.println("Request Content Length = "+len); if (len > 2) { System.out.println("Reading data from request:"); BufferedReader reader = request.getReader(); char[] buffer = new char[len]; int i = reader.read(buffer, 0, buffer.length); s = new String(buffer); s = s.substring(0, s.length()-2); System.out.print(" Data.............:"); System.out.println(s); System.out.println(" Data Length .....:"+i); } Read the return s; input stream } private void processResponse(HttpServletResponse response, String data) throws IOException { System.out.println("Responding..."); response.setContentType("text/plain"); response.setContentLength(data.length()+2); PrintWriter writer = response.getWriter(); writer.println(data); System.out.println("Response Sent"); } Write the response }

Compression levels vary from 1 for best speed to 9 for best compression. If you set the compression to 0, the stream won t be compressed. iText uses default compression: -1. In some cases, a compression level of 9 will result in a smaller stream, but that s no guarantee. Usually, you won t save a lot of space by changing the compression level. The RESOURCE in the example is a BMP image with a size of 492 KB. Before changing the compression, the resulting PDF file is 13 KB; with compression level 9, it s reduced to 11 KB. (With compression 0, it would have been 370 KB.) Lossless compression won t result in dramatic file size reduction. However, if lossy compression is acceptable, you could use java.awt.Image to reduce the quality.

Figure 10.7 shows the same picture three times. The original hitchcock.png image is 16 KB. Due to the way the Image object is constructed, it s compressed using JPEG compression. The image in the first PDF in figure 10.7 is shown with a quality of 100 percent; the size of the file is 35 KB. The quality is reduced to 20 percent in the second PDF, resulting in a file size of 6 KB. At 10 percent quality, the size is 5 KB. This is how you convert the image from PNG to JPEG.

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