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https://issues.apache.org/jira/browse/FOP-2371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13994425#comment-13994425
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Glenn Adams commented on FOP-2371:
----------------------------------
Firstly, you need to determine if complex script features are enabled in your
testing. If they are, then you need to look at the font's GPOS tables
associated with the 'kern' feature to determine if the font defines contextual
kerning. If the are not enabled, then you need to look at the font's 'kern'
table to determine if kerning entries for the pairs you are asking about are
present.
Basically, FOP uses what data is in the font to determine kerning. If no data
is there, there is no kerning. You need to ascertain it is there and enabled
before we can determine if there is a bug or not. If it is there and is
enabled, but is not being used, then there may be a bug.
> Kerning is applied only to certain combinations
> -----------------------------------------------
>
> Key: FOP-2371
> URL: https://issues.apache.org/jira/browse/FOP-2371
> Project: Fop
> Issue Type: Bug
> Components: fonts
> Affects Versions: 1.1
> Environment: Win 64-bit, JRE 1.7.0_40
> Reporter: Jan Tošovský
> Priority: Minor
> Labels: kerning
> Attachments: kern.fo, kern.pdf
>
>
> When VLTAVA is typed with Palatino Linotype font, the kerning is applied to
> AV combination only. The rest, i.e. LT, TA and VA, is typeset without kerning.
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