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POConverting Printable to PDF
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copied!<p>I am working on a user story that asks to be able to print all the existing print out as PDFs too. To do this I am rendering the <code>java.awt.Printable</code> to a <code>BufferedImage</code> and putting this image into a PDF using Apache's PDFBox but I am having a couple of issues using this method:</p> <ul> <li>If I use <code>PDJPeg</code> the image becomes blurry.</li> <li>If I use <code>PDPixelMap</code> the resulting PDF is completely black.</li> </ul> <p>The only other way I can think of is to make a interface, i.e. <code>Printer</code>, and then making two subclasses i.e. <code>PhysicalPrinter</code> and <code>PDFPrinter</code> but this would require that I reimplement all existing <code>java.awt.Printable</code>s to use this new interface.</p> <p>Here is a SSCCE of my current print to PDF method:</p> <pre><code>import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import java.awt.print.PageFormat; import java.awt.print.Printable; import java.awt.print.PrinterException; import java.io.File; import java.util.Random; import javax.imageio.ImageIO; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.edit.PDPageContentStream; import org.apache.pdfbox.pdmodel.graphics.xobject.PDJpeg; public class Printer { private Printer() {} public static boolean printToPDF(String file, Printable printable) { try { PageFormat pageFormat = new PageFormat(); PDDocument doc = new PDDocument(); int width = (int)(pageFormat.getWidth()); int height = (int)(pageFormat.getHeight()); int currentPage = 0; while(true) { BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g2d = image.createGraphics(); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setColor(Color.WHITE); g2d.fillRect(0, 0, width, height); g2d.setColor(Color.BLACK); g2d.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, 12)); if(printable.print(g2d, pageFormat, currentPage) == Printable.NO_SUCH_PAGE) { break; } ImageIO.write(image, "png", new File("test.png")); PDPage page = new PDPage(); doc.addPage(page); PDJpeg img = new PDJpeg(doc, image); //Blurry //PDPixelMap img = new PDPixelMap(doc, image); //Black PDPageContentStream content = new PDPageContentStream(doc, page); content.drawImage(img, 0, 0); content.close(); ++currentPage; } doc.save(file); doc.close(); } catch(Exception e) { e.printStackTrace(); } return true; } public static void main(String[] args) { Printable printable = new Printable() { @Override public int print(Graphics g, PageFormat pf, int index) throws PrinterException { if(index > 0) { return NO_SUCH_PAGE; } Graphics2D g2d = (Graphics2D)g; g2d.translate(pf.getImageableX(), pf.getImageableY()); Random rand = new Random(); for(int i = 0; i < 30; ++i) { int x = rand.nextInt((int)pf.getImageableWidth()); int y = rand.nextInt((int)pf.getImageableHeight()); g2d.drawString("Test", x, y); } return PAGE_EXISTS; } }; printToPDF("Test.pdf", printable); } } </code></pre> <hr> <p><strong>Edit</strong></p> <p>I managed to solved the black <code>PDPixelMap</code>, it was down to the <code>BUfferedImage</code> using the wrong image type. I changed it from <code>BufferedImage.TYPE_INT_RGB</code> to <code>BufferedImage.TYPE_4BYTE_ABGR</code>. Unfortunately the resultant PDF is still blurry.</p>

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