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From "Glenn Adams (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FOP-2371) Kerning is applied only to certain combinations
Date Sun, 11 May 2014 04:54:14 GMT

    [ https://issues.apache.org/jira/browse/FOP-2371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13994425#comment-13994425
] 

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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