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https://issues.apache.org/jira/browse/PDFBOX-5384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17900838#comment-17900838
 ] 

Tilman Hausherr edited comment on PDFBOX-5384 at 11/25/24 12:46 PM:
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Same problem here:  [^PDFJS-15719_reduced.pdf]  [^PDFJS-15719.pdf] 

The change happened in [ https://svn.apache.org/r1841866 ], which is likely the 
same as mentioned above.

After looking at https://github.com/mozilla/pdf.js/issues/15719 and 
unsuccessfully working on it, the only thing that worked was to return null in 
{{loadUnicodeCmap()}} by adding this "too easy" solution before the log warning
{code:java}
                if (getName() != null && getName().startsWith("Tahoma"))
                {
                    return null;
                }     
{code}
Running my regression tests brought me back to this issue.

The PDF.js people use a predefined table for Tahoma and Verdana, very weird.


was (Author: tilman):
Same problem here:  [^PDFJS-15719_reduced.pdf]  [^PDFJS-15719.pdf] 

The change happened in r1841866, which is likely the same as mentioned above.

After looking at https://github.com/mozilla/pdf.js/issues/15719 and 
unsuccessfully working on it, the only thing that worked was to return null in 
{{loadUnicodeCmap()}} by adding this "too easy" solution before the log warning
{code:java}
                if (getName() != null && getName().startsWith("Tahoma"))
                {
                    return null;
                }     
{code}
Running my regression tests brought me back to this issue.

The PDF.js people use a predefined table for Tahoma and Verdana, very weird.

> Wrong glyphs used
> -----------------
>
>                 Key: PDFBOX-5384
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5384
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Rendering
>    Affects Versions: 2.0.25
>            Reporter: Oliver Schmidtmer
>            Priority: Major
>              Labels: regression
>         Attachments: DOR-EC E-N20_118345.pdf, PDFJS-15719.pdf, 
> PDFJS-15719_reduced.pdf, image-2022-03-02-23-41-15-844.png
>
>
> The attached PDF uses Tahoma fonts.
> It seems the correct font is used, but it uses the wrong glyphs.
> For example the "6" from the screenshot is definitely from Tahoma Glyph 25 / 
> CID 54, where it should be "S" Glyph 54 / CID 83.
> The "=" in screenshot is Glyph 32 CID 61 where "Z" Glyph 61 CID 90 should be 
> used.
>  !image-2022-03-02-23-41-15-844.png! 



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