Incomplete variable fonts export to PDF

Description:
I used to suffer from the fact that LibO didn't support correctly variable fonts. I just updated to 7.5.0.2, and now when I export a document made with a TTF font (for me, EB Garamond), some text isn't displayed at all on the PDF. I assume variable font still causes problems.

Steps to Reproduce:
1. Use a TTF font
2. Write text, put some in bold/italic
3. Export it to PDF

Actual Results:
Some of the text isn't exported on the PDF.

Expected Results:
All the text should appear, with proper settings.

Reproducible: Always

User Profile Reset: Yes

Additional Info:
Version: 7.5.0.2 (X86_64) / LibreOffice Community
Build ID: 50(Build:2)
CPU threads: 8; OS: Linux 5.15; UI render: default; VCL: gtk3
Locale: fr-FR (fr_FR.UTF-8); UI: fr-FR
Ubuntu package version: 1:7.5.0~rc2-0ubuntu0.22.04.1~lo1
Calc: threaded

Thank you for reporting the bug. Please attach a sample document, as this makes it easier for us to verify the bug.
I have set the bug's status to 'NEEDINFO'. Please change it back to 'UNCONFIRMED' once the requested document is provided.
(Please note that the attachment will be public, remove any sensitive information before attaching it.
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Created attachment 184687
test document to reproduce the bug

Sure, here you go.

no repro on android viewer [fdroid version]
Version: 7.6.0.0.alpha0+
Build ID: d6c54b3d4ee7

Created attachment 184693
pdf exported from .odt file

Created attachment 184695
bug repro on OP's computer

I believe your document doesn't use the same font than me. Here's what I get

Tested this one with OpenSUSE 15.3 64bit rpm Linux.
Installed ttf EB Garamound first, then started version LO 7.5.0.2.
No problem to export the test document to *.pdf.

Version: 7.5.0.2 (X86_64) / LibreOffice Community
Build ID: c0dd1bc3f1a385d110b88e26ece634da94921f58
CPU threads: 6; OS: Linux 5.3; UI render: default; VCL: kf5 (cairo+xcb)
Locale: de-DE (de_DE.UTF-8); UI: en-US
Calc: threaded

Please try it with "Help" → "Restart in safe mode"

Created attachment 184711
bug repro on OP's computer - safe mode on

Here's the result : more problems.

Created attachment 184727
PDF from 7.5.0.2 with EB Garamond

Are you using Ubuntu-supplied builds or LibreOffice one’s? This functionality requires HarfBuzz ≥ 4.0.0, but Ubuntu 22.04 seems to be still shipping HarfBuzz 2.7.4: https://launchpad.net/ubuntu/jammy/+source/harfbuzz

Here is PDF exported from:
Version: 7.5.0.2 (X86_64) / LibreOffice Community
Build ID: c0dd1bc3f1a385d110b88e26ece634da94921f58
CPU threads: 6; OS: Mac OS X 12.6.2; UI render: default; VCL: osx
Locale: en-EG (en_EG.UTF-8); UI: en-US
Calc: threaded

I'm on LibreOffice prereleases PPA.

(In reply to Kalytis from comment #9)
> I'm on LibreOffice prereleases PPA.

So you are using system HarfBuzz, can you confirm what version of libharfbuzz0b do you have?

2.7.4.1-ubuntu3.1

(In reply to Kalytis from comment #11)
> 2.7.4.1-ubuntu3.1

I’m afraid, variable fonts won’t work with this. You will have to either use TDF builds or wait until system HarfBuzz is updated.

Can you please provide me with a link to TDF's build ? I can't seem to find it anywhere

(In reply to Kalytis from comment #13)
> Can you please provide me with a link to TDF's build ? I can't seem to find
> it anywhere

https://www.libreoffice.org/download/download-libreoffice/

(In reply to Robert Großkopf from comment #14)
> (In reply to Kalytis from comment #13)
> > Can you please provide me with a link to TDF's build ? I can't seem to find
> > it anywhere
>
> https://www.libreoffice.org/download/download-libreoffice/

7.5 is not released yet, so not available on this page, but one can get the download link for the RC2 from its announcement https://qa.blog.documentfoundation.org/2023/01/17/libreoffice-7-5-rc2-is-available-for-testing/

I'm already using 7.5.0.1, see the version mentionned on my bug.

I was talking about a way to update libharfbuzzb0 to a newer version than 2.7.4.1-ubuntu3.1, as it seems to be the problem here.

(In reply to Kalytis from comment #16)
> I'm already using 7.5.0.1, see the version mentionned on my bug.
>
> I was talking about a way to update libharfbuzzb0 to a newer version than
> 2.7.4.1-ubuntu3.1, as it seems to be the problem here.

TDF builds use a bundled version of harfbuzz and don't use the system installed one.

Well, I guess the problem comes with LibreOffice, then.

(In reply to Kalytis from comment #18)
> Well, I guess the problem comes with LibreOffice, then.

Did you try the builds from https://www.libreoffice.org/download/download-libreoffice/?