Glo Kobo fonts naming conventions and embedded fonts

[roger64]

Hi

This is a fork of a previous thread, which was about Kobo font naming conventions and side-loaded fonts. This new subject about embedded fonts maybe deserves its own thread because the problems encountered seem more complex.

I copy here a previous message of mine which will initiate this new thread.

Originally Posted by DNSB

Given that this is a restriction only when adding your own fonts to a Kobo ereader, it does not strike me as overly onerous.

I agree with you that the Kobo naming convention is not overly onerous when you add, once in a lifetime, a side-loaded font to your Kobo. Alas, it's not the only restriction. It also apply for embedded fonts.

Forgive me for this. I will give you an 'onerous' example. You'll understand then better why I am a little sensitive about this question...

After publishing on MR two months ago a batch of 45 EPUB (it was a v2 of my 2012 work) I realized later that if I wished them to be displayed as intended on Kobo ebook readers, I had better rename and/or tweak all of my embedded fonts...

As it's usual for embedded fonts, it was of course not complete fonts but small subsets of the main ones. In each book I embedded the same four fonts: a special font for dropcaps (Linux Libertine Display), another one for smallcaps, a Regular and Italic one.

While the ADE rendering engine copes well with all these fonts and manages to display them precisely, Kobo's chokes on them. The only way I found to display my books as intended on Kobo is using PDF (I also publish each book on 6 and 9,7 inches PDF).

Here is the link to these books (in French).

I still struggle with this and would appreciate any help.