Re: [NTG-context] NotoColorEmoji - loca table not found

13 May 2021


      El jue, 13 de may. de 2021 a la(s) 19:52, Adam Reviczky (reviczky@gmail.com)
escribió:
...
Thanks Jairo,
That indeed works, should've read that it is bitmap only.
I do get a white background though (MKIV), is that how the bitmap is
stored?
In LuaLaTeX with Harfbuzz shaper as well as ConTeXt LMTX, transparency is
properly handled, so I suppose ConTeXt MkIV is to blame in this case. In
case you understand how does ConTeXt handle with bitmap fonts, relevant
files are under
/home/coragyps/lmtx/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/
...
\definefontfeature[Emoji][default][sbix=yes]
\starttext
\framed[background=color,background=black]{\definedfont[file:NotoColorEmoji.ttf*Emoji]\char"1F91D}
\stoptext
In Hans' example for applecoloremoji there is no white background (page 5,
bachotex-2017-emoji.pdf).
I also do not get a white background with LibreOfiice.
I'd wait for Hans to fix it, as I don't really understand font management
in ConTeXt...

Jairo
...
Adam
On Fri, May 14, 2021 at 12:51 AM Jairo A. del Rio 
wrote:
...
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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