In ConTeXt LMTX this works just fine (try mtxrun --generate and context
--make first):

\definefontfeature[Emoji][default][sbix=yes]

\starttext

\definedfont[file:NotoColorEmoji.ttf*Emoji]\char"1F91D

\stoptext

However, when one tries to convert it with ImageMagick the following
happens:

   **** Error reading a content stream. The page may be incomplete.
               Output may be incorrect.
   **** Error: Ignoring spurious ET operator.
               Output may be incorrect.
   **** Error: File did not complete the page properly and may be damaged.
               Output may be incorrect.


Only SVG fonts don't trigger this error in LMTX.


I confirm ConTeXt MkIV is having issues with emoji fonts. It seems that
GraphicsMagick is not properly generating images as it complains about an
improper header.

Jairo

El jue, 13 de may. de 2021 a la(s) 18:26, Adam Reviczky (reviczky@gmail.com)
escribió:

> Hi,
>
> I am trying to use the 'handshake' character (
> https://www.fileformat.info/info/unicode/char/1f91d/fontsupport.htm) from
> the Noto Color Emoji font (
> https://github.com/googlefonts/noto-emoji/blob/main/fonts/NotoColorEmoji.ttf
> ).
>
> The following MWE gives an error:
>
> \starttext
>
> \definedfont[file:NotoColorEmoji.ttf] \char"1F91D
>
> \stoptext
>
> fonts           > otf loading > loading 'NotoColorEmoji.ttf', hash
> 'notocoloremoji'
> system          > lua > compiling
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tma'
> into
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tmc'
> system          > lua > dumping
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tma'
> into
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tmc'
> stripped
> fonts           > otf loading > loading done
> fonts           > otf loading > saving 'NotoColorEmoji.ttf' in cache
> system          > lua > compiling
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tma'
> into
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tmc'
> system          > lua > dumping
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tma'
> into
> '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tmc'
> stripped
> fonts           > otf loading > loading, optimizing, packing and caching
> time 2.557
> pages           > flushing realpage 1, userpage 1, subpage 1
> close source    > level 2, order 3, name '/tmp/MWE.tex'
> close source    > level 1, order 3, name
> '/usr/share/texmf/tex/context/base/mkiv/cont-yes.mkiv'
> ! error:  (file NotoColorEmoji.ttf) (ttf): loca table not foundmtx-context
>     | fatal error: return code: 256
>
> Any idea what is wrong?
>
> Adam
>
>
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