Robert Meyer created PDFBOX-1604:
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Summary: FontBox is not storing all subroutines for CID-Keyed OTF
CFF fonts possibly leading to rendering / width issues
Key: PDFBOX-1604
URL: https://issues.apache.org/jira/browse/PDFBOX-1604
Project: PDFBox
Issue Type: Bug
Components: FontBox
Affects Versions: 1.8.1
Reporter: Robert Meyer
When Fontbox reads a CID-Keyed OTF CFF font, it loops through each FDFont
correctly and stores information to an array of private dictionaries which is
correct. Where it goes wrong though is that the local subroutine indexes for
each of these FDFonts is not stored separately and when a FDFont is read, it
overwrites the previous local subroutine index. This leads to problems as if
the last local subroutine index is small in size, it may request a subroutine
which exceeds the size of the index. This then may cause an error further down
the line when it comes to parsing that information by a renderer (such as the
CharStringRenderer). This may also affect the calculation of character widths
etc.
The issue can be seen in the CFFParser.java at line 501 where a single set to
the font is used as opposed to storing it in any array structure.
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