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https://issues.apache.org/jira/browse/PDFBOX-5648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr resolved PDFBOX-5648.
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Resolution: Fixed
This is a breaking change, so it's changed only in the trunk. Luckily this
feature is mostly useless 😂 (I spent more time finding a test case than making
the change)
> Support GSUB LookupType 2 (Multiple Substitution Format 1), part 2
> ------------------------------------------------------------------
>
> Key: PDFBOX-5648
> URL: https://issues.apache.org/jira/browse/PDFBOX-5648
> Project: PDFBox
> Issue Type: New Feature
> Components: FontBox
> Affects Versions: 3.0.0 PDFBox
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Minor
> Labels: gsub
> Fix For: 4.0.0
>
>
> This table is the reverse of ligatures, i.e. replace one glyph with several
> glyphs. I don't know if this is useful at all for us, except understanding
> the current implementation.
> This will be implemented in two steps. The first step has been done in
> PDFBOX-5603 which is reading these tables. This is the second step, actually
> doing anything with it.
> MapBackedGsubData has a Map<List<Integer>, Integer> which is not useful here.
> Either we'd have to introduce a second map, or extend the map so that the
> value is also a list.
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