Re: Corrupt font display on iOS when using PDF-Images with merge-fonts=true

Hello, to validate the hypothesis you could modify by hand the PDF by
changing the name of the fonts in the tags /FontName and /BaseFont to a
pattern used for embedded subset like AAAAA+xx (the value of xx is not
important) without adding nor removing any byte from the PDF. If this
solves the issue maybe a patch to font name generation is needed for
embedded subsets.

Best regards.

Il giorno mar 16 ago 2022 alle ore 20:45 <[email protected]> ha
scritto:

> Hi,
>
>
>
> If I am able to source a iOS/mac device at work, I will look into this.
>
>
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> Thanks
>
>
>
> *From:* Mark Gibson <[email protected]>
> *Sent:* 16 August 2022 16:56
> *To:* [email protected]
> *Subject:* RE: Corrupt font display on iOS when using PDF-Images with
> merge-fonts=true
>
>
>
> Hi Luca
>
>
>
> We have no control over the source PDF being embedded.  They are often
> (but not always) exported as PDF from Excel.  And done by our clients, not
> us.
>
>
>
> Do we have any other options?  Either via fixups to FOP or bug
> notifications to iOS browsers (I’m gonna guess chromium).
>
>
>
> Thanks
>
> Mark
>
>
>
> *From:* Luca Bellonda <[email protected]>
> *Sent:* 16 August 2022 14:47
> *To:* [email protected]
> *Subject:* Re: Corrupt font display on iOS when using PDF-Images with
> merge-fonts=true
>
>
>
> [EXTERNAL]
>
>
>
> Hello the PDF is visible on Linux viewers and browsers, but the fonts are
> embedded as subset in both the source PDFs and as fully embedded in the
> final PDF with the fonts merged.
>
> The name of the font in the source pdf for example is BCDEEE+Calibri-Bold,
> compatible with embedded subsets (6 chars and a plus sign).
>
> The name of the font in the merged file is Calibri-Bold, which should
> identify it as fully embedded.
>
> I guess the wrong viewer is not able to deal with the character decoding,
> thinking to use a fully embedded font.
>
> Please, try generating the source PDFs embedding the whole fonts and not a
> subset.
>
>
>
>
>
> lb
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> Il giorno mar 16 ago 2022 alle ore 13:13 Mark Gibson <
> [email protected]> ha scritto:
>
>
>
> https://issues.apache.org/jira/browse/FOP-3089
>
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> Viewing in Windows browsers is fine
>
> Viewing in iOS browsers is corrupt
>
> Viewing in Adobe app on iOS and windows is fine
>
> Apologies, no access to Linux devices to test viewing
>
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>
> Same issue occurs when running FOP 2.7 on Linux (CentOS) and Windows (10)
>
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