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https://issues.apache.org/jira/browse/PDFBOX-6249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18110324#comment-18110324
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Tilman Hausherr commented on PDFBOX-6249:
-----------------------------------------
Commit 1937725 from Tilman Hausherr in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1937725 ]
PDFBOX-6249: substitute Adobe-Identity-0 CID-keyed fonts for non-embedded
legacy-ROS fonts + prefer a regular weight when the descriptor has no weight
information, by Tim Allison and 🤖
Commit 1937726 from Tilman Hausherr in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1937726 ]
PDFBOX-6249: add test file by Claude
Commit 1937727 from Tilman Hausherr in branch 'pdfbox/branches/3.0'
[ https://svn.apache.org/r1937727 ]
PDFBOX-6249: add test file by Claude
Commit 1937728 from Tilman Hausherr in branch 'pdfbox/branches/2.0'
[ https://svn.apache.org/r1937728 ]
PDFBOX-6249: add test file by Claude
> Non-embedded Adobe-GB1/CNS1/Japan1 fonts render as .notdef even when Noto CJK
> / Source Han fonts are installed
> --------------------------------------------------------------------------------------------------------------
>
> Key: PDFBOX-6249
> URL: https://issues.apache.org/jira/browse/PDFBOX-6249
> Project: PDFBox
> Issue Type: Task
> Components: Rendering
> Reporter: Tim Allison
> Priority: Minor
> Attachments: cjk-cid-repro.pdf, image-2026-08-31-18-22-38-997.png,
> image-2026-08-31-20-35-16-505.png
>
>
> I ran a rendering bake-off with pdftoppm vs PDFBox on the 1k pdfs in [digital
> corpora
> 0000.zip|https://digitalcorpora.s3.amazonaws.com/corpora/files/CC-MAIN-2021-31-PDF-UNTRUNCATED/zipfiles/0000-0999/0000.zip]
> Â
> There was a small handful of files where pdftoppm and pdfium were handling
> missing cjk fonts a bit better than PDFBox.
> Â
> Specifically:Â
> ||file||non-embedded CID font||collection||
> |0000000.pdf|MSungStd-Light-Acro|Adobe-CNS1|
> |0000063.pdf|STSongStd-Light-Acro|Adobe-GB1|
> |0000750.pdf|MSungStd-Light-Acro|Adobe-CNS1|
> |0000877.pdf|KozGoPro-Medium-Acro|Adobe-Japan1|
> |0000908.pdf|MSungStd-Light-Acro|Adobe-CNS1|
> Â
> I had Claude generate a small repro file (attached).
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