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https://issues.apache.org/jira/browse/PDFBOX-2950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14979992#comment-14979992
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John Hewson commented on PDFBOX-2950:
-------------------------------------
Ok, I have the problem with "SimSun-ExtB" mostly figured out, it's related to
how we implemented the more complex cases of toUnicode for CIDFonts. Fix coming
soon.
I've isolated the problem with "ArialUnicodeMS" to fontbox's cmap table parsing
(as suspected). CmapSubtable#processSubtype4() is parsing only 96 code -> glyph
entries, however there are 38917 in the font.
> Chinese font substitution issue
> -------------------------------
>
> Key: PDFBOX-2950
> URL: https://issues.apache.org/jira/browse/PDFBOX-2950
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 1.8.10, 2.0.0
> Environment: Windows 8, JDK 1.7
> Reporter: WuYu
> Assignee: John Hewson
> Fix For: 2.1.0
>
> Attachments: 20150829A01-18.jpg, 20150829A01-20.jpg,
> 20150829A01_pdf.pdf, PDFBOX-2950-reduced.pdf, acrobat_mac.png,
> pdfbox20_mac.png
>
>
> java -jar pdfbox-app-1.8.10.jar PDFToImage 20150829A01_pdf.pdf
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