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https://issues.apache.org/jira/browse/PDFBOX-3098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15000853#comment-15000853
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John Hewson edited comment on PDFBOX-3098 at 11/11/15 6:30 PM:
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TTF fonts embedded in PDF don't have the same set of required tables as
standalone fonts. In fact, it's possible for the PDF file to specify an
encoding for the font which maps the same Unicode character to different
glyphs, which isn't something that's possible with a cmap table. So in the
general case, creating a default cmap table doesn't work.
There's also the issue of other missing tables such as OS/2, unless the PDF
file embeds ascender and descender information, we can't recreate those
accurately.
was (Author: jahewson):
That's correct. You're expecting an OTF font, which is a CFF font with an SFNT
wrapper. However, PDF supports "bare" CFF fonts, which is just the CFF data
without an SFNT wrapper. The file extension for these is .cff and they can be
opened with FontForge, but few other tools.
> getFontFile2() doesn't extract a valid font file for CID Type 2 fonts
> ---------------------------------------------------------------------
>
> Key: PDFBOX-3098
> URL: https://issues.apache.org/jira/browse/PDFBOX-3098
> Project: PDFBox
> Issue Type: Improvement
> Components: FontBox
> Affects Versions: 2.0.0
> Environment: Windows 10
> Reporter: Ch. Schlatter
>
> I tried to extract an CID Type 2 font (proceed as described in the
> ExtractTTFFonts.java example). It seems that the extracted font isn't valid
> due the missing cmap table. Maybe it's possible to add an default table?
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