[PDFBOX-5587] NullPointerException in PDTrueTypeFont.java getPath( )

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.25
• Fix Version/s: 2.0.29, 3.0.0 PDFBox
• Component/s: Parsing
• Environment: Linux server
• Assignee: Tilman Hausherr
• Reporter: Lonzak
• Created: 13/Apr/23 17:18
• Updated: 01/Jul/23 17:22
• Resolved: 13/Apr/23 18:23

Description

Since April we get the following NPE in our software.

PDFBox is used to convert PDFs to images.

 

java.lang.NullPointerException: null
    at org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getPath(PDTrueTypeFont.java:470) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.TTFGlyph2D.getPathForGID(TTFGlyph2D.java:144) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.TTFGlyph2D.getPathForCharacterCode(TTFGlyph2D.java:93) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.PageDrawer.drawGlyph2D(PageDrawer.java:514) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.PageDrawer.showFontGlyph(PageDrawer.java:495) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.showGlyph(PDFStreamEngine.java:793) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.showGlyph(PDFStreamEngine.java:811) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.showText(PDFStreamEngine.java:749) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.showTextString(PDFStreamEngine.java:608) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.operator.text.ShowText.process(ShowText.java:56) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:939) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:514) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:492) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:155) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:282) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:355) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:272) ~[pdfbox-2.0.25.jar:2.0.25]
    at org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:258) ~[pdfbox-2.0.25.jar:2.0.25]

This is a bit strange, since I thought that this bug was fixed with PDFBOX-3488

PdfBox is running on a linux server but when I tried to access the PDFs I failed to find the right one (over 1 million docs on that server).

On the other hand the fix linked in the ticket points to the following implementation:

 

 @Override
 public GeneralPath getPath(int code) throws IOException{
   if (ttf.getGlyph() == null){
     throw new IOException("glyf table is missing in font " + getName());
   } 

which does not exist anymore in 2.0.3 or higher:

 

@Override
    public GeneralPath getPath(int code) throws IOException{
        int gid = codeToGID(code);
        GlyphData glyph = ttf.getGlyph().getGlyph(gid); 

Any idea why an NPE might occur?

`ttf` might be null or `getGlyph` returns null?