[PDFBOX-3511] NullPointerException - missing glyph description

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.0, 2.0.1, 2.0.2, 2.0.3
• Fix Version/s: 2.0.4, 3.0.0 PDFBox
• Component/s: FontBox
• Assignee: Tilman Hausherr
• Reporter: Daniel Persson
• Created: 23/Sep/16 05:56
• Updated: 25/Mar/17 18:12
• Resolved: 28/Nov/16 19:35

Description

Hi Team.

We process many PDF documents every day and today we ran into a file that we couldn't create an image to. For some reason it has glyphs that didn't have any glyph description.

In GlyfCompositeDescript there is atleast two functions (Line 258, 271) that fetch an GlyphDescription from a map like this:
GlyphDescription gd = descriptions.get(c.getGlyphIndex());

Then the functions use the description without a null check which results in an NullPointer exception.

Exception in thread "main" java.lang.NullPointerException
        at org.apache.fontbox.ttf.GlyfCompositeDescript.getCompositeCompEndPt(GlyfCompositeDescript.java:272)
        at org.apache.fontbox.ttf.GlyfCompositeDescript.getEndPtOfContours(GlyfCompositeDescript.java:126)
        at org.apache.fontbox.ttf.GlyphRenderer.describe(GlyphRenderer.java:72)
        at org.apache.fontbox.ttf.GlyphRenderer.getPath(GlyphRenderer.java:56)
        at org.apache.fontbox.ttf.GlyphData.getPath(GlyphData.java:116)
        at org.apache.pdfbox.pdmodel.font.PDCIDFontType2.getPath(PDCIDFontType2.java:446)
        at org.apache.pdfbox.pdmodel.font.PDType0Font.getPath(PDType0Font.java:506)
        at org.apache.pdfbox.rendering.TTFGlyph2D.getPathForGID(TTFGlyph2D.java:137)
        at org.apache.pdfbox.rendering.TTFGlyph2D.getPathForCharacterCode(TTFGlyph2D.java:93)
        at org.apache.pdfbox.rendering.PageDrawer.drawGlyph2D(PageDrawer.java:353)
        at org.apache.pdfbox.rendering.PageDrawer.showFontGlyph(PageDrawer.java:334)
        at org.apache.pdfbox.contentstream.PDFStreamEngine.showGlyph(PDFStreamEngine.java:744)
        at org.apache.pdfbox.contentstream.PDFStreamEngine.showText(PDFStreamEngine.java:701)
        at org.apache.pdfbox.contentstream.PDFStreamEngine.showTextString(PDFStreamEngine.java:564)
        at org.apache.pdfbox.contentstream.operator.text.ShowText.process(ShowText.java:55)
        at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:815)
        at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:472)
        at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:446)
        at org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:149)
        at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:189)
        at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:145)
        at org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:94)
        at org.apache.pdfbox.tools.PDFToImage.main(PDFToImage.java:236)
        at org.apache.pdfbox.tools.PDFBox.main(PDFBox.java:94)

So far we have only seen one file with this issue in our processing. I've tried to run the PDFToImage with all versions of PDFBox 2 and they fail.

PDFBox 1.8.12 gives some error output but generates an working image.

Sep 23, 2016 7:36:53 AM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: BDC
Sep 23, 2016 7:36:53 AM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: EMC
Sep 23, 2016 7:36:55 AM org.apache.pdfbox.pdmodel.font.PDSimpleFont drawString
WARNING: Changing font on <•> from <null> to the default font
Sep 23, 2016 7:36:55 AM org.apache.pdfbox.pdmodel.font.PDSimpleFont drawString
WARNING: Changing font on <•> from <null> to the default font
Sep 23, 2016 7:36:55 AM org.apache.pdfbox.pdmodel.font.PDSimpleFont drawString
WARNING: Changing font on <•> from <null> to the default font
Sep 23, 2016 7:36:55 AM org.apache.pdfbox.pdmodel.font.PDSimpleFont drawString
WARNING: Changing font on <•> from <null> to the default font
Sep 23, 2016 7:36:55 AM org.apache.pdfbox.pdmodel.font.PDSimpleFont drawString
WARNING: Changing font on <•> from <null> to the default font
Sep 23, 2016 7:36:55 AM org.apache.pdfbox.util.PDFImageWriter writeImage
INFO: Writing: [Removed Identifer]_01_07_201609231.jpg

At the time of writing the bug report the file is to fresh to disclose. Might be able to add it in a week or so depending on the customer, and if it's required for the resolution of this issue.

Thanks for your time.