El jue, 13 de may. de 2021 a la(s) 19= :52, Adam Reviczky (reviczky@gmail.co= m) escribi=C3=B3:

Thanks Jairo,

That ind= eed works, should've read that it is bitmap only.

<= div>I do get a white background though (MKIV), is that how the bitmap is st= ored?

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/c= oragyps/lmtx/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1= 556f32e/fonts/

=C2=A0

\definefontfeature[Emoji][default][sbix=3Dye= s]

\starttext

\framed[backgr= ound=3Dcolor,background=3Dblack]{\definedfont[file:NotoColorEmoji.ttf*Emoji= ]\char"1F91D}

\stoptext
<= p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">
In Hans' example = for applecoloremoji there is no white background (page 5, bachotex-2017-emo= ji.pdf).
I = also do not get a white background with LibreOfiice.

I'd wait for Hans to fix it, as I don't rea= lly understand font management in ConTeXt...

Jairo
=C2=A0
Adam

On Fri, May 14, 2021 at 12:51 AM Jairo A. d= el Rio <jai= roadelrio6@gmail.com> wrote:
In ConTeXt LMTX this works just fine (= try mtxrun --generate and context --make first):

\definefontfea= ture[Emoji][default][sbix=3Dyes]

\starttext

\definedfont[f= ile:NotoColorEmoji.ttf*Emoji]\char"1F91D

\stoptext
<= br>
However= , when one tries to convert it with ImageMagick the following happens:
<= br>=C2=A0 =C2=A0**** Error reading a content stream. The page may be incomp= lete.
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Output may = be incorrect.
=C2=A0 =C2=A0**** Error: Ignoring spurious ET operator.=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Output may be incor= rect.
=C2=A0 =C2=A0**** Error: File did not complete the page properly a= nd may be damaged.
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0Output 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 pro= perly generating images as it complains about an improper header.

<= /p>
Jairo

El jue, 13 de may. de 2021 a la(s) 18:26, Adam Reviczky (reviczky@gmail.com) escribi=C3= =B3:
Hi,

I am trying to use the 'handsha= ke' 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[f= ile:NotoColorEmoji.ttf] \char"1F91D

\stoptext
<= /div>

fonts =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > otf = loading > loading 'NotoColorEmoji.ttf', hash 'notocoloremoji= '
system =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0> lua > compiling &= #39;/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6= c86268d0595268c442/fonts/png/notocoloremoji.tma' into '/home/ubuntu= /.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c4= 42/fonts/png/notocoloremoji.tmc'
system =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0> lua > dumping '/home/ubuntu/.texlive2020/texmf-var/luatex= -cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tm= a' into '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/context/b= 47c3d3cee7cb6c86268d0595268c442/fonts/png/notocoloremoji.tmc' stripped<= br>fonts =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > otf loading > loading d= one
fonts =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > otf loading > savin= g 'NotoColorEmoji.ttf' in cache
system =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0> lua > compiling '/home/ubuntu/.texlive2020/texmf-var/= luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocolorem= oji.tma' into '/home/ubuntu/.texlive2020/texmf-var/luatex-cache/con= text/b47c3d3cee7cb6c86268d0595268c442/fonts/otl/notocoloremoji.tmc'
= system =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0> lua > dumping '/home/u= buntu/.texlive2020/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595= 268c442/fonts/otl/notocoloremoji.tma' into '/home/ubuntu/.texlive20= 20/texmf-var/luatex-cache/context/b47c3d3cee7cb6c86268d0595268c442/fonts/ot= l/notocoloremoji.tmc' stripped
fonts =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 > otf loading > loading, optimizing, packing and caching time 2.5= 57
pages =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 > flushing realpage 1, us= erpage 1, subpage 1
close source =C2=A0 =C2=A0> level 2, order= 3, name '/tmp/MWE.tex'
close source =C2=A0 =C2=A0> level 1, = order 3, name '/usr/share/texmf/tex/context/base/mkiv/cont-yes.mkiv'= ;
! error: =C2=A0(file NotoColorEmoji.ttf) (ttf): loca table not foundmt= x-context =C2=A0 =C2=A0 | fatal error: return code: 256

<= /div>
Any idea what is wrong?

Adam

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