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
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