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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