Larry Lynn created PDFBOX-5191:
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Summary: isEmbeddingPermitted() is too restrictive on TTFs with
OS2 table versions 0-2
Key: PDFBOX-5191
URL: https://issues.apache.org/jira/browse/PDFBOX-5191
Project: PDFBox
Issue Type: Bug
Components: PDModel
Affects Versions: 2.0.21, 3.0.0 PDFBox
Reporter: Larry Lynn
PDFBOX-4882 fixed a bug that made isEmbeddingPermitted() too permissive. But
it introduced a bug that made isEmbeddingPermitted() too restrictive for TTFs
with OS2 table versions 0-2.
TTFs with OS2 table versions 0-2 can have multiple permission bits set.
According to the spec described in
[https://docs.microsoft.com/en-us/typography/opentype/spec/os2#fstype]
"in the event that more than one of bits 0 to 3 are set in a given font, then
the _least-restrictive permission indicated take precedence_."
Unfortunately, the current code essentially makes the most restrictive
permission take precedence. This causes pdfbox to throw an error:
"This font does not permit embedding"
when attempting to process fonts that worked fine in pdfbox v2.0.20 and lower
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