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Posted to dev@pdfbox.apache.org by "Constantine Dokolas (Jira)" <ji...@apache.org> on 2025/05/08 12:02:00 UTC
[jira] [Updated] (PDFBOX-6004) Support "SymbolSetEncoding" for fonts
[ https://issues.apache.org/jira/browse/PDFBOX-6004?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Constantine Dokolas updated PDFBOX-6004:
----------------------------------------
Description:
I've encountered a PDF with a font named "SymbolMT" which defines its encoding as {{{}SymbolSetEncoding{}}}. Using the debugger app, I get a warning ({{{}Warning [PDSimpleFont] Unknown encoding: SymbolSetEncoding{}}}) and multiple {{No Unicode mapping ...}} warnings.
I couldn't find official documentation for this encoding, but the {{pdf.js}} project has support for this encoding implemented [here |https://github.com/mozilla/pdf.js/blob/6f052312d625224173db36d3e661657a89cf1865/src/core/encodings.js#L207] and it looks correct at first glance.
Perhaps it's possible to support this encoding?
Notes
* I've not tested text extraction with PDFBox to see what codepoints are generated, but Adobe Acrobat converts those codes to the box char (the "unknown" char?)
* The pdfdebugger app font viewer says: "Encoding: BuiltInEncoding / built in (TTF)"
was:
I've encountered a PDF with a font named "SymbolMT" which defines its encoding as `SymbolSetEncoding`. Using the debugger app, I get a warning (`Warning [PDSimpleFont] Unknown encoding: SymbolSetEncoding`) and multiple `No Unicode mapping ...` warnings.
I couldn't find official documentation for this encoding, but the `pdf.js` project has support for this encoding implemented [here |https://github.com/mozilla/pdf.js/blob/6f052312d625224173db36d3e661657a89cf1865/src/core/encodings.js#L207] and it looks correct at first glance.
Perhaps it's possible to support this encoding?
Note: I've not tested text extraction with PDFBox to see what codepoints are generated, but Adobe Acrobat converts those codes to the box char (the "unknown" char?)
> Support "SymbolSetEncoding" for fonts
> -------------------------------------
>
> Key: PDFBOX-6004
> URL: https://issues.apache.org/jira/browse/PDFBOX-6004
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 2.0.33
> Reporter: Constantine Dokolas
> Priority: Minor
>
> I've encountered a PDF with a font named "SymbolMT" which defines its encoding as {{{}SymbolSetEncoding{}}}. Using the debugger app, I get a warning ({{{}Warning [PDSimpleFont] Unknown encoding: SymbolSetEncoding{}}}) and multiple {{No Unicode mapping ...}} warnings.
> I couldn't find official documentation for this encoding, but the {{pdf.js}} project has support for this encoding implemented [here |https://github.com/mozilla/pdf.js/blob/6f052312d625224173db36d3e661657a89cf1865/src/core/encodings.js#L207] and it looks correct at first glance.
> Perhaps it's possible to support this encoding?
> Notes
> * I've not tested text extraction with PDFBox to see what codepoints are generated, but Adobe Acrobat converts those codes to the box char (the "unknown" char?)
> * The pdfdebugger app font viewer says: "Encoding: BuiltInEncoding / built in (TTF)"
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