[lltx] Missing glyphs in font

Khaled Hosny khaledhosny at eglug.org
Thu Oct 7 16:06:21 CEST 2010

On Thu, Oct 07, 2010 at 03:28:10PM +0200, Yves Scherrer wrote:
>  One more little thing:
> When I typeset a document with a glyph that is missing in the
> selected font, the XeLaTeX logfile contains a nice warning:
> Missing character: There is no ✓ in font Gentium
> Basic/ICU:script=latn;langua
> ge=DFLT;!
> When I do the same with LuaLaTeX, I get the rather cryptic message:
> luaotfload | otf process: missing cache for lookup cs_l_0_s of type
> gsub_contex
> t in font 21 (Gentium Basic)
> It would be nice to phrase this message in a way that is
> understandable for the common LaTeX user :)

The "Missing character:" warning is there, you didn't look hard enough
:) (it is an engine error AFAIK so it is present in all TeX engines).
The message you are citing is unrelated.

> (In addition, I ask myself if this shouldn't be written to the
> standard output, rather than just to the log file. After all,
> missing characters change the content of the file and are thus
> "worse" than mere layout problems like, say, overfull and underfull
> boxes.)
> What do you think?

That is something to be directed to LuaTeX team.

 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer

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