[libreoffice-users] Re: font replacement rules

... be aware that font/glyph replacement rules are different in Linux/Unix
than they are in Windows. I don't use Macs so can't comment on that OS.

Take a look at:
https://wiki.documentfoundation.org/LibreOffice_Localization_Guide/Advanced_Source_Code_Modifications.

e.g.: "Under unix, where fontconfig is used for font fallback, then if the
first entry in the list is not available, fontconfig is consulted for the
best replacement font to use based off that fontname and the desired locale.
Under other platforms LibreOffice loops through the list until one is
found."

Also under the "Font Fallback" and "Glyph Fallback", the same thing is
stated, although both sections are marked as "This section needs updating!"

It is also clear that LibreOffice has quite a few easily reproducible bugs
relating to font replacement. If, for instance, you are using a particular
font that contains glyphs for multiple different writing systems (e.g. one
that uses non-Latin Unicode characters) to type two languages in the same
document (e.g. English and Hebrew or French and Thai), Writer will sometimes
happily substitute a completely different font for the "foreign" characters
instead of using your chosen font for both languages. This CAN BE mitigated
somewhat by using the CTL (Complex Text Layout) settings, but that is spotty
and inconsistent at best.

To be fair, this behavior has been around since the birth of the code in
Star Office days. I guess my point is that even having a wide variety of
fonts doesn't necessarily guarantee a good layout. You need to experiment to
figure out what works best with the particular documents you tend to work
with - there will always be some quirks.



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