Re: noto-emoji-ttf not working correctly

[Thomas Klausner <wiz%NetBSD.org@localhost>]

On Thu, Apr 07, 2022 at 10:16:39PM +0000, RVP wrote:
> On Thu, 7 Apr 2022, Thomas Klausner wrote:
> 
> > M-x describe char says:
> > 
> >    ftcrhb:-GOOG-Noto Color Emoji-normal-normal-normal-*-13-*-*-*-m-0-iso10646-1 (#x373)
> > 
> 
> That looks like a bitmap font specifier. Does:
> 
> 	xterm -fd 'Noto Color Emoji:style=Regular'
> 
> followed by:
> 
> 	echo $'\U1F3A4 \U1F352'
> 
> produce the microphone and cherry glyph (in B&W)?

No.

> If it does, then the
> font is OK. For a colour test, put the hex into an .html file and open in
> firefox.

In firefox, it does, but I don't know which font it is using for that
- I have efont-unicode installed which supports many emoji symbols as
well.


I've found https://github.com/googlefonts/noto-emoji/issues/36 in the
meantime which talks about bugs in cairo and fontconfig in 2015, but I
guess those are all fixed. It also contains fonts.conf suggestions
like this one:

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
    <match target="scan">
        <test name="family">
            <string>Noto Color Emoji</string>
        </test>
        <edit name="scalable" mode="assign">
            <bool>true</bool>
        </edit>
    </match>

    <match>
        <test name="family"><string>sans-serif</string></test>
        <edit name="family" mode="prepend" binding="weak">
            <string>Noto Color Emoji</string>
        </edit>
    </match>

    <match>
        <test name="family"><string>serif</string></test>
        <edit name="family" mode="prepend" binding="weak">
            <string>Noto Color Emoji</string>
        </edit>
    </match>

    <match>
        <test name="family"><string>Apple Color Emoji</string></test>
        <edit name="family" mode="prepend" binding="strong">
            <string>Noto Color Emoji</string>
        </edit>
    </match>

</fontconfig>

and I can see with 'FC_DEBUG=1024 pango-view --annotate=1 --font="Noto
Color Emoji" emoji-test.txt' that the files are read, but this doesn't
fix anything, I see an empty glyph.

I tried twemoji-color-font-ttf as well. I get black'n'white emojis
with that font, but nothing in color, despite the name.
 Thomas