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https://issues.apache.org/jira/browse/PDFBOX-3757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15973012#comment-15973012
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ASF subversion and git services commented on PDFBOX-3757:
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Commit 1791809 from [~tilman] in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1791809 ]
PDFBOX-3757: use LinkedHashMap instead of TreeMap to iterate in insertion order
> TTFSubsetter scrambles PostScript names and unicode codepoints when subset
> contains diaeresis
> ---------------------------------------------------------------------------------------------
>
> Key: PDFBOX-3757
> URL: https://issues.apache.org/jira/browse/PDFBOX-3757
> Project: PDFBox
> Issue Type: Bug
> Components: FontBox
> Affects Versions: 2.0.5
> Reporter: Tobias Fischer
> Assignee: Tilman Hausherr
> Attachments: fontbox-2.0.5-ttfsubsetter_dieresis-scrambled-names.png,
> fontbox-2.0.5-ttfsubsetter_scrambled-codepoints.png,
> Subset-DejaVuSans__dieresis-scrambled-names.ttf,
> Subset-DejaVuSans__scrambled-codepoints.ttf
>
>
> I tried to build a standalone FontSubsetter with the great fontbox tools. It
> works so far for OpenType/TrueType fonts, but when the glyph subset contains
> characters with diaeresis (like german umlauts äöü), the TTFSubsetter class
> scrambles PostScript names and unicode codepoints.
> When creating a subset from DejaVuSans.ttf for example, with only those two
> characters "Ö " (O umlaut and a hair space \u200A), the resulting font subset
> is recognized as a valid font, but the unicode codepoint 200A in the
> resulting font file has the postscript name "Dieresis" and the single
> dieresis are named "uni200A". See screenshot
> "fontbox-2.0.5-ttfsubsetter_dieresis-scrambled-names.png" and the subsetted
> Font "Subset-DejaVuSans__dieresis-scrambled-names.ttf".
> When there are more glyphs in the subset, more whitespace, special chars and
> umlauts, the scrambling goes even further and also scrambles unicode
> codepoints and not only postscript names:
> glyphs in subset: "RabenköigKrmloEyGfthsTjHdAu cvFüD. w,äUp:IzWVZSN-ßLC
> PB5M«»O2013Q©/;x978-()64XJ'!Ä?‹› ...ÜqY &Öé|_•{}[]>#*$^\\+"
> Resulting font: "Subset-DejaVuSans__scrambled-codepoints.ttf"
> Screenshot: "fontbox-2.0.5-ttfsubsetter_scrambled-codepoints.png"
> I considder this a bug, as it does not appear when there are no umlauts or
> diaeresis in the subset.
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