bug#40390: Rendering problems when using fonts from Guix on foreign distro

bug#40390: Rendering problems when using fonts from Guix on foreign distro

[Evan Straw]

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Hello all,

I have Guix installed on a foreign distro (Ubuntu 19.10) as a package
manager, and I am attempting to use fonts installed through Guix for
applications installed from Guix, such as Emacs and keepassxc. I have
installed fontconfig and a few font packages. However, I am noticing
that these fonts seem to be interfering with fonts installed via the
system's package manager (APT) and are causing rendering problems in
non-Guix applications such as evince.

The font packages I have installed from Guix are as follows:

--8<---------------cut here---------------start------------->8---
evan@virtualplaza:~$ guix package --list-installed | grep font
font-ubuntu	0.83	out	/gnu/store/6ydn8a96n2zmmrhjckqklfmg83frwl9w-font-ubuntu-0.83
font-gnu-freefont-ttf	20120503	out	/gnu/store/bp0hagiy6j8r0x11r4arsyv7k61lyqfk-font-gnu-freefont-ttf-20120503
font-dejavu	2.37	out	/gnu/store/yr42nyxrqkh89fanvii82br6qil4zcbx-font-dejavu-2.37
gs-fonts	8.11	out	/gnu/store/8ppj83wc1mmrdydh9cy7vqvg0bym8l0q-gs-fonts-8.11
font-adobe-source-han-sans	1.004	jp	/gnu/store/z9mgamhzwnh73w3y7q9flg54gmzr9kx7-font-adobe-source-han-sans-1.004-jp
fontconfig	2.13.1	out	/gnu/store/rkq6ipys8hf5hw66jkzzw4nfr6ncq96a-fontconfig-2.13.1
font-abattis-cantarell	0.111	out	/gnu/store/l0h8n4jn0xhj942gdh28i3rvbbywi613-font-abattis-cantarell-0.111
--8<---------------cut here---------------end--------------->8---

However, when I open a document in evince, the terminal spits out the
following errors about "cairo scaled fonts":

--8<---------------cut here---------------start------------->8---
(evince:19449): Pango-WARNING **: 10:28:58.135: failed to create cairo scaled font, expect ugly output. the offending font is 'Ubuntu 11'

(evince:19449): Pango-WARNING **: 10:28:58.135: font_face status is: <unknown error status>

(evince:19449): Pango-WARNING **: 10:28:58.135: scaled_font status is: out of memory

(evince:19449): Pango-WARNING **: 10:28:58.135: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='Ubuntu 11', text='●'

(evince:19449): Pango-WARNING **: 10:28:58.142: failed to create cairo scaled font, expect ugly output. the offending font is 'Ubuntu 10.5595703125'

(evince:19449): Pango-WARNING **: 10:28:58.142: font_face status is: <unknown error status>

(evince:19449): Pango-WARNING **: 10:28:58.142: scaled_font status is: out of memory

(evince:19449): Pango-WARNING **: 10:28:58.142: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='Ubuntu 10.5595703125', text='The quick brown fox jumps over the lazy dog.'

(evince:19449): Pango-WARNING **: 10:28:58.408: failed to create cairo scaled font, expect ugly output. the offending font is 'Ubuntu Italic 11'

(evince:19449): Pango-WARNING **: 10:28:58.408: font_face status is: <unknown error status>

(evince:19449): Pango-WARNING **: 10:28:58.408: scaled_font status is: out of memory

(evince:19449): Pango-WARNING **: 10:28:58.408: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='Ubuntu Italic 11', text='3'

(evince:19449): Pango-WARNING **: 10:28:58.414: failed to create cairo scaled font, expect ugly output. the offending font is 'Ubuntu Italic 13.1982421875'

(evince:19449): Pango-WARNING **: 10:28:58.414: font_face status is: <unknown error status>

(evince:19449): Pango-WARNING **: 10:28:58.414: scaled_font status is: out of memory

(evince:19449): Pango-WARNING **: 10:28:58.414: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='Ubuntu Italic 13.1982421875', text='Document contains no annotations'
--8<---------------cut here---------------end--------------->8---

When viewing the application window, all text is replaced by empty white
boxes, as shown in the attached screenshot.

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Is this a bug, or am I simply doing something wrong here? Is there any
additional configuration I need to do to get fonts from the system and
Guix to cooperate with each other?

Any help would be appreciated. Please also let me know if there's any
needed but missing information and I'll be happy to provide it.

Thanks,
-- Evan <evan.straw99@gmail.com>

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bug#40390: Rendering problems when using fonts from Guix on foreign distro

[Ludovic Courtès]

Hi Evan,

Evan Straw <evan.straw99@gmail.com> skribis:

> I have Guix installed on a foreign distro (Ubuntu 19.10) as a package
> manager, and I am attempting to use fonts installed through Guix for
> applications installed from Guix, such as Emacs and keepassxc. I have
> installed fontconfig and a few font packages. However, I am noticing
> that these fonts seem to be interfering with fonts installed via the
> system's package manager (APT) and are causing rendering problems in
> non-Guix applications such as evince.
>
> The font packages I have installed from Guix are as follows:
>
> evan@virtualplaza:~$ guix package --list-installed | grep font
> font-ubuntu	0.83	out	/gnu/store/6ydn8a96n2zmmrhjckqklfmg83frwl9w-font-ubuntu-0.83
> font-gnu-freefont-ttf	20120503	out	/gnu/store/bp0hagiy6j8r0x11r4arsyv7k61lyqfk-font-gnu-freefont-ttf-20120503
> font-dejavu	2.37	out	/gnu/store/yr42nyxrqkh89fanvii82br6qil4zcbx-font-dejavu-2.37
> gs-fonts	8.11	out	/gnu/store/8ppj83wc1mmrdydh9cy7vqvg0bym8l0q-gs-fonts-8.11
> font-adobe-source-han-sans	1.004	jp	/gnu/store/z9mgamhzwnh73w3y7q9flg54gmzr9kx7-font-adobe-source-han-sans-1.004-jp
> fontconfig	2.13.1	out	/gnu/store/rkq6ipys8hf5hw66jkzzw4nfr6ncq96a-fontconfig-2.13.1
> font-abattis-cantarell	0.111	out	/gnu/store/l0h8n4jn0xhj942gdh28i3rvbbywi613-font-abattis-cantarell-0.111
>
>
> However, when I open a document in evince, the terminal spits out the
> following errors about "cairo scaled fonts":
>
> (evince:19449): Pango-WARNING **: 10:28:58.135: failed to create cairo scaled font, expect ugly output. the offending font is 'Ubuntu 11'

You may need to update the Fontconfig font cache by running:

  fc-cache -fv

(See
<https://guix.gnu.org/manual/en/html_node/Application-Setup.html#X11-Fonts>.)

Does that help?

Thanks,
Ludo’.

bug#40390: Rendering problems when using fonts from Guix on foreign distro

[Evan Straw]

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Ludovic Courtès <ludo@gnu.org> writes:

> Hi Evan,
>
> Evan Straw <evan.straw99@gmail.com> skribis:
>
>> I have Guix installed on a foreign distro (Ubuntu 19.10) as a package
>> manager, and I am attempting to use fonts installed through Guix for
>> applications installed from Guix, such as Emacs and keepassxc. I have
>> installed fontconfig and a few font packages. However, I am noticing
>> that these fonts seem to be interfering with fonts installed via the
>> system's package manager (APT) and are causing rendering problems in
>> non-Guix applications such as evince.
>>
>> The font packages I have installed from Guix are as follows:
>>
>> evan@virtualplaza:~$ guix package --list-installed | grep font
>> font-ubuntu	0.83	out	/gnu/store/6ydn8a96n2zmmrhjckqklfmg83frwl9w-font-ubuntu-0.83
>> font-gnu-freefont-ttf	20120503	out	/gnu/store/bp0hagiy6j8r0x11r4arsyv7k61lyqfk-font-gnu-freefont-ttf-20120503
>> font-dejavu	2.37	out	/gnu/store/yr42nyxrqkh89fanvii82br6qil4zcbx-font-dejavu-2.37
>> gs-fonts	8.11	out	/gnu/store/8ppj83wc1mmrdydh9cy7vqvg0bym8l0q-gs-fonts-8.11
>> font-adobe-source-han-sans	1.004	jp	/gnu/store/z9mgamhzwnh73w3y7q9flg54gmzr9kx7-font-adobe-source-han-sans-1.004-jp
>> fontconfig	2.13.1	out	/gnu/store/rkq6ipys8hf5hw66jkzzw4nfr6ncq96a-fontconfig-2.13.1
>> font-abattis-cantarell	0.111	out	/gnu/store/l0h8n4jn0xhj942gdh28i3rvbbywi613-font-abattis-cantarell-0.111
>>
>>
>> However, when I open a document in evince, the terminal spits out the
>> following errors about "cairo scaled fonts":
>>
>> (evince:19449): Pango-WARNING **: 10:28:58.135: failed to create cairo scaled font, expect ugly output. the offending font is 'Ubuntu 11'
>
> You may need to update the Fontconfig font cache by running:
>
>   fc-cache -fv
>
> (See
> <https://guix.gnu.org/manual/en/html_node/Application-Setup.html#X11-Fonts>.)
>
> Does that help?
>
> Thanks,
> Ludo’.

Hello! My apologies for leaving this hanging for so long.

It appears I had a fontconfig configuration file left over from a long
time ago that was intended to manually add the path for Guix fonts to
the fontconfig paths, so that I could use Ubuntu's fontconfig rather
than use fontconfig from Guix. I had forgotten it was even
there. Getting rid of it and re-caching the fonts like you said has
fixed the issue.

Not sure why I thought that was a good idea...

Thank you for your help!
-- Evan <evan.straw99@gmail.com>

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bug#40390: Rendering problems when using fonts from Guix on foreign distro

[Leo Famulari]

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On Wed, Apr 22, 2020 at 12:29:50PM -0700, Evan Straw wrote:
> Hello! My apologies for leaving this hanging for so long.
> 
> It appears I had a fontconfig configuration file left over from a long
> time ago that was intended to manually add the path for Guix fonts to
> the fontconfig paths, so that I could use Ubuntu's fontconfig rather
> than use fontconfig from Guix. I had forgotten it was even
> there. Getting rid of it and re-caching the fonts like you said has
> fixed the issue.

I'm glad to hear it! Closing the bug...

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bug#40390: Rendering problems when using fonts from Guix on foreign distro

[Ludovic Courtès]

Hi,

Evan Straw <evan.straw99@gmail.com> skribis:

> It appears I had a fontconfig configuration file left over from a long
> time ago that was intended to manually add the path for Guix fonts to
> the fontconfig paths, so that I could use Ubuntu's fontconfig rather
> than use fontconfig from Guix. I had forgotten it was even
> there. Getting rid of it and re-caching the fonts like you said has
> fixed the issue.

Good that you found out, closing!

Ludo’.