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https://issues.apache.org/jira/browse/PDFBOX-4951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18094530#comment-18094530
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Tilman Hausherr commented on PDFBOX-4951:
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So what we have now is that FOP is ok for the DIN 92379 topic, but not for
advanced scripts. Its only usage would be for people who need these extra DIN
92379 characters but want to avoid AWT. I'm surprised that FOP fails at
Bengali, because FOP has implemented all these advanced tables and we didn't.
[~msahyoun] [~lehmi] Shall I create another subproject for FOP?
> Sequences of DIN SPEC 91379 with combining letters are rendered incorrectly
> ---------------------------------------------------------------------------
>
> Key: PDFBOX-4951
> URL: https://issues.apache.org/jira/browse/PDFBOX-4951
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.21
> Reporter: Volker Kunert
> Priority: Major
> Attachments: Bildschirmfoto_2026-07-07_08-38-04.png,
> DIN_SPEC_91379_Sequences-aa.pdf, DIN_SPEC_91379_Sequences-ab.pdf,
> DIN_SPEC_91379_Sequences-ac.pdf, DIN_SPEC_91379_Sequences.txt,
> DefaultScriptProcessor.java, DejaVuSans.ttf, DoGlyphLayoutBidi.pdf,
> DoGlyphLayoutDinSpec91379.pdf, DoGlyphLayoutDinSpec91379Form.pdf,
> DoGlyphPositionBengali.pdf, ExamplePdfboxFopPos-By-Tilman.pdf,
> ExamplePdfboxFopPos.java, ExamplePdfboxFopPos.pdf,
> ExamplePdfboxFopPosForm.java, ExamplePdfboxFopPosForm.pdf,
> FiraCode-Regular.ttf, FontForge-Lohit-Bengali.png, TestPdfbox.java,
> TestPdfboxFop2.java, TestPdfboxFop2.pdf, TestPdfboxJava2D.java,
> TestPdfboxJava2D.pdf, bengali.fo, bengali.pdf, bidi-1.png, bidi-2.png,
> bidi.fo, bidi.pdf, bidi.png, config.xml, dejavu-sequences.png,
> example-PDFBOX-3147-NotoSansThaiLooped-Regular.png,
> image-2026-05-23-16-16-53-442.png, image-2026-05-23-16-17-28-172.png,
> image-2026-05-26-16-49-45-529.png, image-2026-07-04-21-37-03-606.png,
> image-2026-07-04-21-37-35-370.png, kerning.fo, kerning.pdf,
> ligatures-kerning.png, patch-2020-10-02.txt, pdfbox.patch, pdfbox.pdf,
> screenshot-1.png, screenshot-2.png, screenshot-3.png
>
>
> Accented Letters composed of Unicode base letter and combining accent are
> rendered wrong. E.g. with 0041 030B LATIN CAPITAL LETTER A WITH COMBINING
> DOUBLE ACUTE ACCENT the accent appears at the right hand side of the letter
> A, not above the letter A.
> The position is wrong for most of the sequences defined in the following spec:
> DIN SPEC 91379: Characters in Unicode for the electronic processing of names
> and data
> exchange in Europe; with digital attachment
> [https://www.xoev.de/downloads-2316#StringLatin]
> [https://www.din.de/de/wdc-beuth:din21:301228458]
>
> The correct rendering should look like the output of hb-view 2.6.8, see files
> DIN_SPEC_91379_Sequences*.pdf.
> The output of PDFBox is appended in pdfbox.pdf, which is created by running
> TestPdfbox.java. The sequences are read from file
> DIN_SPEC_91379_Sequences.txt.
>
> Font used for testing: NotoSansMono-Regular.ttf, see
> [https://www.google.com/get/noto/]
> download:
> [https://noto-website-2.storage.googleapis.com/pkgs/NotoSansMono-hinted.zip]
> See also FOP-2969
>
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