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List:       fop-dev
Subject:    [jira] [Created] (FOP-3087) PDFTranscoder fails to auto-detect system fonts by default
From:       Julian_Müller_(Jira) <jira () apache ! org>
Date:       2022-08-10 20:58:36
Message-ID: JIRA.13476245.1660165348000.148486.1660165380005 () Atlassian ! JIRA
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Julian Müller created FOP-3087:
----------------------------------

             Summary: PDFTranscoder fails to auto-detect system fonts by default
                 Key: FOP-3087
                 URL: https://issues.apache.org/jira/browse/FOP-3087
             Project: FOP
          Issue Type: Bug
    Affects Versions: 2.7, 2.6, 2.4, 2.5
            Reporter: Julian Müller


Contrary to the documentation, the PDFTranscoder fails to auto-detect system fonts by \
default, and also does not honor transcoding hint KEY_AUTO_FONTS = true.

This is because the implicitly built configuration is not set up correctly. Line 163
{code:java}
                       c.addChild(fonts); {code}
in AbstractFOPTranscoder needs to be moved after line 165, which is
{code:java}
                       fonts.addChild(autodetect); {code}
  
A simple workaround to this problem is to explicitly pass a correctly set up \
configuration to PDFTranscoder, however, it would be preferable if PDFTranscoder \
would just honor its contract.

I think this bug was introduced by FOP-2733, due to a subtle difference in Avalon's \
configuration package and its replacement. Avalon's configuration package allowed the \
addition of children in any order, but the new FOP configuration package adds copies \
instead of the original children, so the configuration tree needs to be built from \
the leaves to the root node. As of now, the code in AbstractFOPTranscoder does not \
follow this new requirement and instead builds the configuration tree from the root \
to the leaf.



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