[jira] [Created] (PDFBOX-2923) CFFParser parser treats CIDFont's charset data as SID

["Petras (JIRA)" <ji...@apache.org>]

Petras created PDFBOX-2923:
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             Summary: CFFParser parser treats CIDFont's charset data as SID
                 Key: PDFBOX-2923
                 URL: https://issues.apache.org/jira/browse/PDFBOX-2923
             Project: PDFBox
          Issue Type: Bug
          Components: FontBox
            Reporter: Petras


As stated in Compact Font File specification:
{quote}
The charset data, although in the same format as non-CIDFonts, will represent CIDs rather than SIDs, i.e. charstrings are “named” by CIDs in a CIDFont.
{quote}
Unfortunately, {{CFFParser}} does not consider this specific and always treat charset data as SID: is looking for SID referenced text in _String INDEX_ structure. Since such SID-indexed string does not exist there, it sets the name of the glyph to "{{.ndef}}".

Consequently, {{CFFParser}} fails to register correct charstrings, as it associates glyph names to them using a map. As there can be several charstrings, only the last charstring entry is retained.

Then also {{CFFFont.getWidth()}} method fails to return correct width of the given CID as correct link between CID and charstring is lost.



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