Just FYI, on windows Qt uses the Microsoft GDI engine for rendering text. The GDI engine is ancient and does not support OTF fonts with CFF font data.
Unless Qt switches to using DirectWrite on windows, you will not be able to see OTF fonts with CFF font data in any Qt based application, such as calibre or sigil.
Last edited by kovidgoyal; 01-04-2015 at 08:44 AM.
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