I got some problems loading .otf fonts with fontspec in lualatex. What I don't get is the following: Let's suppose I have several .ttf font styles. Then I will just specify them succesively for my main font styles.

    Path = fonts/, 
    BoldFont = SourceSansPro-Regular, 
    ItalicFont = SourceSansPro-LightIt]

However, I have only one SourceSansPro-Regular.otf file containing the bold and the italic style as well. If I specify this file exclusively, the other styles don't get loaded. So how do I include the other styles? It's probably an easy task, but I don't really understand the documentation...

EDIT: SourceSansPro is supposed to be an example; it could be any other font.

  • Why dont you \usepackage[light]{sourcesanspro}? – Alain Merigot Sep 29 '19 at 22:23
  • because my actual font isn't sourcesanspro. It was supposed to be an example. – J.N. Sep 29 '19 at 22:27
  • @UltimateTrick The question can't really be answered without saying how the actual font is implemented. Normally a font file contains only one font, e.g. SourceSansPro-Regular.otf and SourceSansPro-It.otf are different files. So the only way I would know about how this would work would be a ttc file (basically a collection of multiple fonts, you just have to specify the index) or a Variable Font (these are mostly used for different widths and weights though and currently are not implmented in luaotfload) – Marcel Krüger Sep 29 '19 at 22:38
  • Hm okay. In this specific case my font ist Myriad Pro, stored only under MyriadPro-Regular.otf. And in MS Word I can switch to italics or bold. Perhaps, these are just MS Word generated?! – J.N. Sep 29 '19 at 22:43
  • 2
    @UltimateTrick Right, normally Myriad Pro also has separate font files for italic/bold fonts, but you might have to pay for them separatly. Otherwise Word probably uses fake bold/fake italic fonts. fontspec can do the same (look at AutoFakeBold AutoFakeSlant in the manual) but you get way better results with the real variants. – Marcel Krüger Sep 29 '19 at 22:52

As pointed out in the comments, I was just confused by MS Word's fake bold/fake italic: An .otf font file contains only one font.

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