Font naming problem

[Kornel Benko]

Am Mon, 31 Jan 2022 15:04:24 -0500
schrieb Scott Kostyshak <skostysh at lyx.org>:

> On Sun, Jan 30, 2022 at 12:51:26PM +0100, Kornel Benko wrote:
> > This is for lyx2.4 _and_ lyx2.3
> > 
> > 1. open new file in lyx
> > 2. write some text
> > 3. Document->Settings->Fonts
> >    3a. check: Use non-TeX fonts
> >    3b. Select roman font: "David CLM"
> >    3c. Formats->Default output format: PDF(LuaTeX)
> > 4. Try a preview ==> Package fontspec Error: The font "DavidCLM" cannot be found.
> > 5. save the file
> > 
> > 6. Now check that there _is_ a font matching "David"
> >  $ fc-list -f "%{fullname}\n" |grep David
> > 	David CLM Medium
> > 	David CLM Medium Italic
> > 	David CLM Bold Italic
> > 	David CLM Bold
> > 7. OK, now edit the saved file with an editor and change
> > 	\font_roman "default" "David CLM [bitstream]"
> >    to
> > 	\font_roman "default" "David CLM Medium [bitstream]"
> > 8. open again with lyx
> > 9. check the preview now works
> > 10. Look into Document->Settings->Fonts->Roman  
> > 	==> David CLM Medium [bitstream] (not installed)  
> >   
> 
> I can reproduce, although I do not have "[bitstream]" and I'm not sure what refers to
> above.
> 
> > This does not feel OK.  
> 
> Agreed. I do not know if it is a LyX issue or a luaotfload issue. It is
> strange that XeTeX seems to work fine for the same example.
> 
> I don't understand much, but perhaps the following is related?
> 
>   https://github.com/latex3/luaotfload/issues/78
> 
> $ luaotfload-tool  --find 'David CLM'
> luaotfload | db : Reload initiated (formats: otf,ttf,ttc); reason: Font "David CLM" not
> found. luaotfload | resolve : sequence of 3 lookups yielded nothing appropriate.
> luaotfload | resolve : Cannot find "David CLM" in index.
> luaotfload | resolve : Hint: use the --fuzzy option to display suggestions.
> $ luaotfload-tool  --find 'David CLM Medium'
> luaotfload | resolve : Font "David CLM Medium" found!
> luaotfload | resolve : Resolved file name
> "/usr/share/fonts/truetype/culmus/DavidCLM-Medium.otf" $ 
> 
> Interestingly --fuzzy does not find what I thought it would.
> 
> $ luaotfload-tool --fuzzy --find 'David CLM'
> luaotfload | db : Reload initiated (formats: otf,ttf,ttc); reason: Font "David CLM" not
> found. luaotfload | resolve : sequence of 3 lookups yielded nothing appropriate.
> luaotfload | resolve : Cannot find "David CLM" in index.
> luaotfload | resolve : Looking for close matches, this may take a while ...
> luaotfload | query : Distance from "davidclm": 4
>     David CLM Bold
>     Navilu

Same here BTW.

> 
> Scott

I would blame luaotfload-tool, alas, there is a third player involved here: QT.
Lyx is getting the list of families from QT at
	src/frontends/qt/GuiDocument.cpp:2686
so we have no chance to select anything else.
It would be handy here to enter/modify custom font name IMO.

	Kornel
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