Jonas Jenwald 459d26edec Improve handling of mismatching /BaseFont and /FontName entries for non-embedded fonts (issue 7454) ...

This patch is the result of me going through some old issues regarding non-embedded Wingdings support.

There's a few different things wrong in the referenced PDF document:
 - The /BaseFont and /FontName entries don't agree on the name of the fonts, with one font using `/BaseFont /Wingdings-Regular` and `/FontName /wg09np` which obviously makes no sense.
   To address this we'll compare the font-names against our lists of known ones and ignore /FontName entries that don't make sense iff the /BaseFont entry is a known font-name.
 - The non-embedded Wingdings font also set an incorrect /Encoding, in this case /MacRomanEncoding, which should have been fixed by PR 16465. However this doesn't work since the font has *bogus* font-flags, that fail to categorize the font as Symbolic.
   To address this we'll also compare the font-name against the list of known symbol fonts.

2023-06-02 17:10:25 +02:00

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