I removed my references to jempbox, and followed the migration guide. The 2.0.0-RC3 code creates the thumbnail and doesn't generate any extraneous error messages. Yay!
Thanks for your help. -Glen ________________________________________ From: Tilman Hausherr <[email protected]> Sent: Tuesday, March 15, 2016 3:08 PM To: [email protected] Subject: Re: NPE when calling TTFSubFont.addCharCode via PDPage.convertToImage Am 15.03.2016 um 22:53 schrieb Glen Hein: > I tried 2.0.0-RC3 > (http://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox/2.0.0-RC3), but I > got an maven error about a missing POM file on one of the dependencies. This > is the error I get from maven: > > Failed to collect dependencies at org.apache.pdfbox:jempbox:jar:2.0.0-RC3: > Failed to read artifact descriptor for > org.apache.pdfbox:jempbox:jar:2.0.0-RC3: Could not transfer artifact > org.apache.pdfbox:jempbox:pom:2.0.0-RC3 from/to > forgerock-snapshots-repository (http://maven.forgerock.org/repo/snapshots): > Failed to transfer file: > http://maven.forgerock.org/repo/snapshots/org/apache/pdfbox/jempbox/2.0.0-RC3/jempbox-2.0.0-RC3.pom. > Return code is: 409 , ReasonPhrase:Conflict. -> [Help 1] > > I can try to find the dependency manually and install it into my local repo. jempbox no longer exists. But if you want it, you can continue to use the 1.8 version. Tilman > > -Glen > > ________________________________________ > From: Tilman Hausherr <[email protected]> > Sent: Tuesday, March 15, 2016 2:45 PM > To: [email protected] > Subject: Re: NPE when calling TTFSubFont.addCharCode via PDPage.convertToImage > > If possible, try the 2.0 version. Read the migration guide re: > converting to images. > > Tilman > > Am 15.03.2016 um 22:39 schrieb Glen Hein: >> Hello, >> >> >> I'm trying to create a thumbail of a PDF and I'm getting a bunch of NPE >> stacktraces when I call PDPage.convertToImage. This only occurs with certain >> PDFs. The NPE is being thrown from TTFSubFont.addCharCode. The NPEs are >> being logged (99 separate but identical stacktraces), but not passed up to >> my calling code. The resulting image is blank (all white). This makes it >> difficult for the calling code to detect the error condition. Is this a >> known problem? Is there a work-around so the calling code can detect the >> error? >> >> >> Let me know if you want the actual PDF, and the preferred way to post it to >> the list. >> >> >> This is how I'm calling the code: >> >> >> private byte[] generatePdfThumbnail(PDDocument pdfDocument) throws >> IOException { >> PDPage page = (PDPage) pdfDocument.getDocumentCatalog() >> .getAllPages() >> .get(0); >> >> BufferedImage image = page.convertToImage(BufferedImage.TYPE_INT_RGB, >> RESOLUTION_DPI); >> int largestDimension = Math.max(image.getHeight(), image.getWidth()); >> float scalingFactor = IMAGE_HEIGHTWIDTH / largestDimension; >> int scaledHeight = (int) (image.getHeight() * scalingFactor); >> int scaledWidth = (int) (image.getWidth() * scalingFactor); >> >> BufferedImage scaledImage = new BufferedImage(scaledWidth, >> scaledHeight, >> BufferedImage.TYPE_INT_RGB); >> Graphics2D graphics = scaledImage.createGraphics(); >> graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, >> RenderingHints.VALUE_INTERPOLATION_BILINEAR); >> graphics.drawImage(image, 0, 0, scaledWidth, scaledHeight, null); >> graphics.dispose(); >> >> try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) >> { >> ImageIOUtil.writeImage(scaledImage, >> FORMAT_NAME, >> outputStream, >> RESOLUTION_DPI, >> IMAGE_QUALITY); >> return outputStream.toByteArray(); >> }http://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox/2.0.0-RC3 >> } >> >> Here is the stacktrace I'm seeing: >> >> >> Mar 15, 2016 1:48:12 PM org.apache.pdfbox.util.PDFStreamEngine >> processOperator >> WARNING: java.lang.NullPointerException >> java.lang.NullPointerException >> at >> org.apache.fontbox.ttf.TTFSubFont.addCharCode(TTFSubFont.java:106) >> at org.apache.fontbox.ttf.TTFSubFont.<init>(TTFSubFont.java:95) >> at >> org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.rebuildTTF(PDTrueTypeFont.java:550) >> at >> org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getawtFont(PDTrueTypeFont.java:478) >> at >> org.apache.pdfbox.pdmodel.font.PDSimpleFont.drawString(PDSimpleFont.java:110) >> at >> org.apache.pdfbox.pdfviewer.PageDrawer.processTextPosition(PageDrawer.java:260) >> at >> org.apache.pdfbox.util.PDFStreamEngine.processEncodedText(PDFStreamEngine.java:504) >> at >> org.apache.pdfbox.util.operator.ShowText.process(ShowText.java:56) >> at >> org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:562) >> at >> org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:269) >> at >> org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:236) >> at >> org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:216) >> at >> org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:139) >> at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:801) >> at >> ddf.catalog.transformer.input.pdf.PdfInputTransformer.generatePdfThumbnail(PdfInputTransformer.java:170) >> at >> ddf.catalog.transformer.input.pdf.PdfInputTransformer.generatePdfThumbnail(PdfInputTransformer.java:162) >> ... >> >> >> Thanks in advance, >> >> Glen >> >> >> >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
