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https://issues.apache.org/jira/browse/PDFBOX-5599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17735553#comment-17735553
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Andreas Lehmkühler commented on PDFBOX-5599:
--------------------------------------------

According to [wikipedia|https://en.wikipedia.org/wiki/Ligature_(writing)] "ti" 
isn't a common ligature, sort of surprise but now it is obvious why it is 
missing in some fonts even if they support ligatures.

[Noto fonts|https://fonts.google.com/noto/fonts] might be a substitution for 
Liberation Sans. They support ligatures but the "ti" is missing as well.

> Support latin ligatures
> -----------------------
>
>                 Key: PDFBOX-5599
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5599
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: FontBox
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>            Priority: Major
>              Labels: gsub
>             Fix For: 3.0.0 PDFBox
>
>         Attachments: image-2023-05-11-20-40-51-942.png
>
>
> I was able to successfully create PDFs with latin ligatures using the Calibri 
> font (but not the Arial font, I think these aren't supported, although others 
> are). I'm using a stripped down version of the GSUB worker for Bengali. It 
> had one small flaw which I'll fix in a separate issue.



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