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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___________________________________________________________________________________

Hi Hans, Yes, sorry about the error :). Thanks for the explanation, will use lmtx for that, though probably best just using another font (some mentioned on the list https://www.mail-archive.com/ntg-context@ntg.nl/msg92800.html and https://mailman.ntg.nl/pipermail/ntg-context/2020/098136.html) or svg or metapost as I do not need it in colour. I thought it would be easier via fonts but backtracking on the idea now and maybe using something like this instead: https://thenounproject.com/term/handshake/153516/. Thank you, Adam On Fri, May 14, 2021 at 4:33 PM Hans Hagen wrote:

On 5/14/2021 3:21 AM, Jairo A. del Rio wrote:

...

El jue, 13 de may. de 2021 a la(s) 19:52, Adam Reviczky (reviczky@gmail.com mailto: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}

took me quite a while to realize that there is an error in that line

...

\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...

in lmtx we use a different method

in mkiv we can actually switch to a variant that was on hold till texlive release (i.e. luatex 1.13, i forgot about that)

even then, because we cache the problem in mkiv is more with the conversion tools that drop masks ..

Hans

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net

___________________________________________________________________________________

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. my experiences with graphicmagick and such conversions are bad, one can also get pdf with missing objects and so ... when you have a version

On 5/14/2021 1:49 AM, Jairo A. del Rio wrote: that works, best stick to that before updating (or keep it around) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------