[Bug 1035486] New: Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Bug ID: 1035486
           Summary: Text renders fuzzy in Fedora 20
           Product: Fedora
           Version: 20
         Component: fontconfig
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail],
                    [e-mail], [e-mail],
                    [e-mail]

Description of problem:

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.
2.
3.

Actual results:

Expected results:

Additional info:

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #1 from [e-mail] ---
Here is my initial report against GNOME:
https://bugzilla.gnome.org/show_bug.cgi?id=707777

However, it's not a GNOME bug. Changing the default font hinting to slight is
one proposed solution. See the GNOME bug report for more information,
discussion and some rendered samples showing the difference from freetype-2.4
to freetype-2.5.

Thanks.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Akira TAGOH  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
          Component|fontconfig                  |abattis-cantarell-fonts
           Assignee|[e-mail]            |[e-mail]

--- Comment #2 from Akira TAGOH  ---
<match target="font">
  <test name="family" compare="eq">
    <string>Cantarell</string>
  </test>
  <edit name="hintstyle" mode="assign">
    <const>hintslight</const>
  </edit>
</match>

would works if you are expecting to change the default hint style to slight for
Cantarell only (according to the discussion the above URL)

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #3 from [e-mail] ---
That would be a good start at least. But is it possible to assign hintslight
per rasterizer instead of per font name? All OpenType fonts are fuzzy with the
current hinting in freetype 2.5 with Adobe's new rasterizer for OpenType
merged. However, as Cantarell is such a large part of the experience of Fedora
I would love to have that font fixed at least. Can this land in time for Fedora
20?

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #4 from Akira TAGOH  ---
For f20, no. final change deadline has been gone and GA is coming soon. plus,
that change may possibly affects a lot of fonts and it would be risky to do
from now.

You can try:

<match target="font">
  <test name="fontformat" compare="eq">
    <string>CFF</string>
  </test>
  <edit name="hintstyle" mode="assign">
    <const>hintslight</const>
  </edit>
</match>

instead. that may needs to be tested widely in f21 development timeframe and
get a feedback on it because how it looks like is subjective. that said having
this kinda recipe per fonts are our policy in Fedora and that would be safe to
make any changes. so if you are aware of any other issues, that would be good
to file a bug against that problematic font packages unless this kinda changes
is needed for a lot of packages.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Matthias Clasen  changed:

What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #5 from Matthias Clasen  ---
Can we get this into f21 now, then ? So it can get the wide testing it requires
?

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #6 from [e-mail] ---
OpenSUSE 13.1 (GNOME) renders sharp text even though they have freetype 2.5 so
obviously they have solved any issues they had.
> <match target="font">
>   <test name="fontformat" compare="eq">
>     <string>CFF</string>
>   </test>
>   <edit name="hintstyle" mode="assign">
>     <const>hintslight</const>
>   </edit>
> </match>

This seems like a good solution -> getting all CFF fonts covered instead of
having to enter rules for every single font. I don't know how to test this and
I'm still on Fedora 19 but it seems legit?

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #7 from Akira TAGOH  ---
(In reply to alexhultman from comment #6)
> This seems like a good solution -> getting all CFF fonts covered instead of
> having to enter rules for every single font. I don't know how to test this
> and I'm still on Fedora 19 but it seems legit?

Unfortunately no, you can't. matching on fontformat has been implemented in
2.11.0 (strictly speaking from the devel snapshot of 2.10.94) and not yet
planning to push an update for f19 or older. so you need to try it on f20 at
this moment.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #8 from [e-mail] ---
No no, I'm not talking about trying this on Fedora 19 (the whole point of this
bug report is that Fedora 19 already have perfectly sharp text). I was kind of
wondering if you had written "pseudo code" or actually legit config that works.

How do I test this? Where do I put that config, in what files and how?

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #9 from Akira TAGOH  ---
Created attachment 836286
  --> https://bugzilla.redhat.com/attachment.cgi?id=836286&action=edit
full recipe to test

just try to put the attached recipe under $HOME/.config/fontconfig/conf.d/

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Andy Wang  changed:

What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #10 from Andy Wang  ---
I tried that recipe and no go.  fonts are still fuzzy.  I'm not familiar enough
with fontconfig to diagnose it though.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Akira TAGOH  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |needinfo?(dopey@moonteeth.c
                   |                            |om)

--- Comment #11 from Akira TAGOH  ---
(In reply to Andy Wang from comment #10)
> I tried that recipe and no go.  fonts are still fuzzy.  I'm not familiar
> enough with fontconfig to diagnose it though.

How did you test it? are you sure the font you saw is really Cantarell or any
CFF fonts?

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Christoph Höger  changed:

What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #12 from Christoph Höger  ---
I can confirm the issue. Please note that "Monospace" is unaffected and looking
crisp with hinting=full.

However, I dropped your attachment into fontconfig/conf.d/ and also got no
result. I also tried ~/.fonts.conf.d/ ...

Is there anything I can help to sort that out?

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Andy Wang  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|needinfo?(dopey@moonteeth.c |
                   |om)                         |

--- Comment #13 from Andy Wang  ---
I did with Cristoph did.  Dropped the recipe into .config/fontconfig/conf.d

Tried to do it globally in /etc/fonts/conf.d as well.

According to gnome tweak tool, my Window Titles and Interface fonts are
Cantarell Bold and just Cantarell.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

AGS  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #14 from AGS  ---
Have you tried installing the 'freetype-freeworld' font rendering package from
RPMFusion?  I currently have it installed on all of my Fedora systems and I'm
not experiencing the issues you describe when I use hint-slight.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Brian Marshall  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #15 from Brian Marshall  ---
(In reply to Akira TAGOH from comment #4)
> <match target="font">
>   <test name="fontformat" compare="eq">
>     <string>CFF</string>
>   </test>
>   <edit name="hintstyle" mode="assign">
>     <const>hintslight</const>
>   </edit>
> </match>

I could be wrong, but I think assigning hintstyle in fontconfig is overrided by
gnome-settings-daemon/XSETTINGS. See
https://bugs.freedesktop.org/show_bug.cgi?id=11838

I'm coming at this from the opposite direction (like fuzzy fonts, want
hintmedium for CFF and hintslight for everything else). It seems like the crux
of the issue is that with the new CFF rasterizer, CFF fonts are fuzzy at medium
hinting and sharp at slight hinting, which is the opposite of all the other
fonts.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Sam Thursfield  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #16 from Sam Thursfield  ---
Adding the conf.d snippet does fix Thunderbird, but doesn't fix window title
bars or interface text in Gtk+ apps. That does suggest it's being overridden by
XSETTINGS for Gtk+.

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Daniel L.  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #17 from Daniel L.  ---
I've just upgraded two machines to F20 and now see this on both of them :( Most
fonts are looking applicable with slight hinting. Changing the hinting with
gnome-tweak-tool to medium or full reduces sharpness!

Please, can anyone change the urgency to high as this is an embarrassing issue
for a distro like Fedora?

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

--- Comment #18 from Akira TAGOH  ---
just FYI, aside from XSETTINGS issue, abattiscantarell-fonts has a trick in
31-cantarell.conf to fallback to other fonts due to the glyph coverage in
Cantarell font maybe with replacing the family name as the weak binding. for
this reason, it may depends on the language how it works:

$ LANG=en_US.UTF-8 fc-match Cantarell
Cantarell-Regular.otf: "Cantarell" "Regular"
$ LANG=ja_JP.UTF-8 fc-match Cantarell
VL-PGothic-Regular.ttf: "VL Pゴシック" "regular"

[Bug 1035486] Text renders fuzzy in Fedora 20

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1035486

Andrew Davis  changed:

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                   |ect.org                     |
                 CC|                            |[e-mail]