5:25 a.m.
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
Bug ID: 1545149
Summary: OTF/CFF conts no longer hinted horizontally
Product: Fedora
Version: 27
Component: freetype
Assignee: mkasik(a)redhat.com
Reporter: ossman(a)cendio.se
QA Contact: extras-qa(a)fedoraproject.org
CC: ajax(a)redhat.com, alexl(a)redhat.com,
fonts-bugs(a)lists.fedoraproject.org,
john.j5live(a)gmail.com, kevin(a)tigcc.ticalc.org,
mbarnes(a)fastmail.com, mclasen(a)redhat.com,
mkasik(a)redhat.com, rhughes(a)redhat.com,
rstrode(a)redhat.com, sandmann(a)redhat.com
I upgraded from Fedora 26 to Fedora 27 and all of a sudden OTF/CFF fonts such
as Cantarell are no longer hinted horizontally, making them appear blurry and
out of focus.
A similar change was done for TTF fonts previously, but that could be reverted
by setting "FREETYPE_PROPERTIES=truetype:interpreter-version=35".
Is there a similar setting hidden for this latest change? The normal font
hinting settings have no effect on this.
--
You are receiving this mail because:
You are on the CC list for the bug.
7:47 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
Nikolaus Waxweiler <madigens(a)gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |madigens(a)gmail.com
--- Comment #1 from Nikolaus Waxweiler <madigens(a)gmail.com> ---
OTFs weren't hinted horizontally before, what was turned off was stem
darkening. If you prefer a thicker look, try
FREETYPE_PROPERTIES="truetype:interpreter-version=35 cff:no-stem-darkening=0"
See
https://www.freetype.org/freetype2/docs/text-rendering-general.html#disab....
--
You are receiving this mail because:
You are on the CC list for the bug.
9:04 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #2 from Pierre Ossman <ossman(a)cendio.se> ---
Hmm... I don't think that was it.
Crap. I can't really reproduce any issue. I should have taken screen shots back
in February.
Perhaps there was something wrong with the auto-hinter that got fixed? Right
now Cantarell looks like shit with the standard hinting. But the autohinter
sorts that out, and it most definitely does some horizontal hinting, at least
for Cantarell.
--
You are receiving this mail because:
You are on the CC list for the bug.
9:16 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #3 from Pierre Ossman <ossman(a)cendio.se> ---
Scratch that, even with the auto hinter it still is pretty bad when you
actually start using it. And fortunately I found an old screen shot of how it
used to render. So please see the attachment for a comparison. In the old
version it used to hint horizontally very aggressively.
--
You are receiving this mail because:
You are on the CC list for the bug.
9:16 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #4 from Pierre Ossman <ossman(a)cendio.se> ---
Created attachment 1501958
--> https://bugzilla.redhat.com/attachment.cgi?id=1501958&action=edit
rendering comparison
--
You are receiving this mail because:
You are on the CC list for the bug.
4:30 p.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #5 from Nikolaus Waxweiler <madigens(a)gmail.com> ---
Interesting. I can't immediately find which FreeType F26 shipped with, your F26
image however looks like you had full hinting and autohinting active at the
same time. Try adding this to your fontconfig config:
<match target="font">
<test name="family">
<string>Cantarell</string>
</test>
<edit mode="assign" name="hinting">
<bool>true</bool>
</edit>
<edit mode="assign" name="autohint">
<bool>true</bool>
</edit>
<edit mode="assign" name="hintstyle">
<const>hintfull</const>
</edit>
</match>
(Not sure if you need to use 'match target="font"' or
'...="pattern"')
If that doesn't match what you had before, another possibility was that your FT
was using the previous CFF renderer before Adobe contributed the one in current
use. I don't think you can select the old one through fontconfig, it's a
compile time option iirc.
--
You are receiving this mail because:
You are on the CC list for the bug.
9:30 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #6 from Pierre Ossman <ossman(a)cendio.se> ---
(In reply to Nikolaus Waxweiler from comment #5)
Interesting. I can't immediately find which FreeType F26 shipped
with, your
F26 image however looks like you had full hinting and autohinting active at
the same time. Try adding this to your fontconfig config:
...
I already had such a file to force the autohinter. But the other additions had
no effect.
But I was already enabling full hinting through gnome tweak tool. Anything
other than full hinting gives blurry text almost by definition.
If that doesn't match what you had before, another possibility was that your
FT was using the previous CFF renderer before Adobe contributed the one in
current use. I don't think you can select the old one through fontconfig,
it's a compile time option iirc.
I doubt it. Fedora 26 uses 2.7 according to the Fedora repo. And the Adobe
engine was added in 2.5 if I understand things correctly.
--
You are receiving this mail because:
You are on the CC list for the bug.
9:36 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #7 from Pierre Ossman <ossman(a)cendio.se> ---
Aha! I think I found the missing detail to test this. You need to enable
subpixel hinting as well. Apparently I disabled that somewhere along the line
of finding a workaround for this issue.
So:
* Forced autohinter for Cantarell
* Full hinting
* Subpixel hinting
Then compare Fedora 28 and freetype-2.7.1-10.fc26. You'll see sharp stems with
the 2.7.1, and fuzzy ones with 2.8.
You can test this directly on your Fedora 28 machine. Just download the old RPM
here:
https://koji.fedoraproject.org/koji/buildinfo?buildID=1045246
Unpack it using rpm2cpio, and then point at it using LD_LIBRARY_PATH. Then you
can easily compare then new and old stuff.
--
You are receiving this mail because:
You are on the CC list for the bug.
3:07 p.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #8 from Nikolaus Waxweiler <madigens(a)gmail.com> ---
Do you mean subpixel rendering?
This is interesting. In ftview from that build, If I enable normal
anti-aliasing (A) and forced autohinting (f) and switch to subpixel rendering
(C) and forced autohinting, some glyphs seems to glitch by being a pixel or so
wider at 16px (e.g. i, j, doubles quotes). Aside from that, nothing changes
significantly?
In the newest ftview from git, I can't seem to enable full autohinting with
subpixel rendering.
--
You are receiving this mail because:
You are on the CC list for the bug.
3:07 p.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #9 from Nikolaus Waxweiler <madigens(a)gmail.com> ---
Created attachment 1503145
--> https://bugzilla.redhat.com/attachment.cgi?id=1503145&action=edit
Comparison shot
Upper left: ftview 2.7.1 with normal grayscale rendering plus forced
autohinting
Lower left: ftview 2.7.1 with RGB subpixel rendering plus forced autohinting
Upper right: ftview git master with normal grayscale rendering plus forced
autohinting
--
You are receiving this mail because:
You are on the CC list for the bug.
3:17 p.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #10 from Nikolaus Waxweiler <madigens(a)gmail.com> ---
Going on a limb here, have you tried enabling warping? Only available in slight
autohinting mode.
--
You are receiving this mail because:
You are on the CC list for the bug.
9:28 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #11 from Pierre Ossman <ossman(a)cendio.se> ---
instead. (In reply to Nikolaus Waxweiler from comment #8)
Do you mean subpixel rendering?
Right, sorry. ftview does its own thing, so I started simply comparing GTK
applications. The setting I was referring to here is "Antialiasing: Subpixel"
in GNOME Tweaks.
This is interesting. In ftview from that build, If I enable normal
anti-aliasing (A) and forced autohinting (f) and switch to subpixel
rendering (C) and forced autohinting, some glyphs seems to glitch by being a
pixel or so wider at 16px (e.g. i, j, doubles quotes). Aside from that,
nothing changes significantly?
ftview's rendering doesn't seem to be representative of what GTK does, so it
might not be the best test case. Your image does show a bit of the tendencies
though as there are a lot of single pixel wide stems in the lower left example.
(and the glitch is mentioned on bug 1035486 comment #36)
In the newest ftview from git, I can't seem to enable full
autohinting with
subpixel rendering.
Isn't that the problem though? Neither ftview nor GTK is able to get that mode
fully working.
(In reply to Nikolaus Waxweiler from comment #10)
Going on a limb here, have you tried enabling warping? Only available
in
slight autohinting mode.
It seems to have some effect, but it doesn't even compensate for the extra blur
caused by going from full hinting to slight.
--
You are receiving this mail because:
You are on the CC list for the bug.
7:34 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
--- Comment #12 from Ben Cotton <bcotton(a)redhat.com> ---
This message is a reminder that Fedora 27 is nearing its end of life.
On 2018-Nov-30 Fedora will stop maintaining and issuing updates for
Fedora 27. It is Fedora's policy to close all bug reports from releases
that are no longer maintained. At that time this bug will be closed as
EOL if it remains open with a Fedora 'version' of '27'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version.
Thank you for reporting this issue and we are sorry that we were not
able to fix it before Fedora 27 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.
Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.
--
You are receiving this mail because:
You are on the CC list for the bug.
9:10 a.m.
New subject: [Bug 1545149] OTF/CFF conts no longer hinted horizontally
https://bugzilla.redhat.com/show_bug.cgi?id=1545149
Pierre Ossman <ossman(a)cendio.se> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|27 |28
--
You are receiving this mail because:
You are on the CC list for the bug.
1970
days inactive
2256
days old
fonts-bugs@lists.fedoraproject.org
13 comments
1 participants
participants (1)
-
bugzilla＠redhat.com