[
https://issues.apache.org/jira/browse/PDFBOX-4793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17053280#comment-17053280
]
Christian Appl edited comment on PDFBOX-4793 at 3/6/20, 10:49 AM:
------------------------------------------------------------------
I have got doubts about that.
"Malgun Gothic" is the only Malgun font installed on my system and it did
previously cause the issue (for me) and it does no longer (post Commit 1874846)
!screenshot-10.png!
I will check this for for Malgun Gothic Semilight too and edit this comment
then. But I am still not convinced, that "codePageRange" is working as expected.
*EDIT:*
!image-2020-03-06-11-48-56-813.png!
!image-2020-03-06-11-49-25-187.png!
Ok - now I am totally confused. O.o
was (Author: capsvd):
I have got doubts about that.
"Malgun Gothic" is the only Malgun font installed on my system and it did
previously cause the issue (for me) and it does no longer (post Commit 1874846)
!screenshot-10.png!
I will check this for for Malgun Gothic Semilight too and edit this comment
then. But I am still not convinced, that "codePageRange" is working as expected.
> Questionable fallback font for some embedded chinese fonts
> ----------------------------------------------------------
>
> Key: PDFBOX-4793
> URL: https://issues.apache.org/jira/browse/PDFBOX-4793
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.18, 2.0.19
> Reporter: Christian Appl
> Assignee: Tilman Hausherr
> Priority: Major
> Fix For: 2.0.20, 3.0.0 PDFBox
>
> Attachments: PDFJS-10699.pdf, image-2020-03-04-09-49-42-323.png,
> image-2020-03-04-09-58-01-055.png, image-2020-03-04-10-09-25-343.png,
> image-2020-03-04-10-31-03-065.png, image-2020-03-06-11-35-53-580.png,
> image-2020-03-06-11-48-56-813.png, image-2020-03-06-11-49-25-187.png,
> pdf_font-zhcn.pdf, screenshot-10.png, screenshot-11.png, screenshot-2.png,
> screenshot-3.png, screenshot-4.png, screenshot-5.png, screenshot-6.png,
> screenshot-7.png, screenshot-8.png, screenshot-9.png
>
>
> *Issue:*
> I tried to render PDFs, that contain embedded chinese fonts. Neither the PDF
> Debugger, nor printouts of the document (PDFPrintable), nor the PDFRenderer
> can display/render the chinese glyphs correctly and will render placeholders
> instead.
> *Assumptions:*
> I assume, that said embedded fonts are incomplete and don't contain all
> glyphs, that would be required to render the text properly and therefore
> PDFbox attempts to use the previously determined fallback font. (!?)
> !image-2020-03-04-09-49-42-323.png!
> !image-2020-03-04-09-58-01-055.png!
> And fails to find the glyphs in said fallback font.
> Which is not surprising, as the Fallback font "MalgunGothic-Semilight"
> (Windows standard font) does not contain chinese characters.
> !image-2020-03-04-10-09-25-343.png!
> *Debugging:*
> I tried to understand how the fallback font is determined and what could be
> done to solve this problem on my end. But I was unable to find a satisfying
> solution.
> My best guess so far is, that the CIDFontMapping (FontMapperImpl) is to blame
> for determining an unfit fallback font.
> Although it seems to check, whether required codepages are contained in a
> fallback font, it still does rank the Malgun font as the topscorer and best
> substitute font, even though it does clearly not contain all required
> codepages.
> *My opinion:*
> This is troubling, as better fit fonts exist and could have been selected.
> (ie.: Adobe Stong Std) And are indeed included in the CIDFontMapping, but
> seemingly are scoring lower for some reason.
> *Further information:*
> I can not disclose the document in question, however I found a document
> (pdf_font-zhcn.pdf) in another issue (PDFBOX-3132), that can be used to
> reproduce the issue (ie.: by dropping it into the PDF Debugger)
> !image-2020-03-04-10-31-03-065.png!
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
