bold font rendeing in Java is broken in Cosmic with OpenJDK 11

Bug #1799014 reported by Václav Haisman on 2018-10-21
24
This bug affects 3 people
Affects Status Importance Assigned to Milestone
openjdk-11 (Debian)
Fix Released
Unknown
openjdk-lts (Ubuntu)
Medium
Tiago Stürmer Daitx
Bionic
Medium
Unassigned
Cosmic
Medium
Unassigned

Bug Description

Since update to Cosmic, I see that bold fonts in Java have broken rendering. See attached 400% scaled PNG for illustration. The 'r' in bold rendering of "Hello World" shows basically a vertical line from the end of the hook end. I am not entirely sure this is freetype issue but some sources (https://github.com/adobe/brackets/issues/14290) suggest there is a bug in the 2.8.1 version that Cosmic seems to install (libfreetype6/cosmic,now 2.8.1-2ubuntu2 amd64 [installed]).

Václav Haisman (vzeman79) wrote :
tags: added: cosmic
affects: openjdk-lts (Ubuntu) → openjdk
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in freetype (Ubuntu):
status: New → Confirmed
Václav Haisman (vzeman79) wrote :

Here is a small test application that shows the issue.

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

affects: openjdk → openjdk-lts (Ubuntu)
Changed in openjdk-lts (Ubuntu):
status: New → Confirmed
Thorsten Glaser (mirabilos) wrote :

The testcase needs the “package test;” in the first line removed / commented-out, then it works.

This works in 11.0.1+13-2 on Debian sid, as a new data point.

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in openjdk-lts (Ubuntu):
status: New → Confirmed

The bug has been fixed in Debian just by removing a patch:

 openjdk-11 (11~28-3) unstable; urgency=medium
 .
   * Drop the jdk-freetypeScaler-crash patch. Closes: #905718.

Changed in openjdk-11 (Debian):
status: Unknown → Fix Released
Sebastien Bacher (seb128) wrote :

@Laurent, that changes is supposed to be in the cosmic version of the package though
https://launchpad.net/ubuntu/+source/openjdk-lts/11~28-3ubuntu1

"openjdk-lts (11~28-3ubuntu1) cosmic; urgency=medium

  * Sync packages with 11~28-3."

The debian bug also states that updating openjdk didn't fix the issue but updating other gtk pacakges did (without specific on which one could have fixed the issue)

> updating other gtk pacakges did [fix the issue]

Indeed.

I confirm that on my Debian sid+experimental system, fonts look OK in openjdk-11.

I tried to investigate the problem in Ubuntu cosmic by first trying to determine which fonts are used by the JRE. I used this command:

  cat /proc/$(pidof java)/maps | grep font

and only found files from /var/cache/fontconfig/ and no actual font files.
Other applications have files from /usr/share/fonts/, but not the JRE.
Without this I do not know where to look further :<...

md_5 (md-5) wrote :

Yeah its still an issue with 11.0.1+13-2ubuntu1, and also the upstream release https://jdk.java.net/11/

freetype has been causing such issues in the last year or so....

md_5 (md-5) wrote :

Stealing libfreetype6 2.9.1-3 from Debian and installing it make the rendering passable again.
Not subjectively 100% as good as Java 8, but fine enough to get used to.

Matthias Bläsing (mblaesing) wrote :

I still see font distortions on ubuntu cosmic:

openjdk version "11.0.1" 2018-10-16
OpenJDK Runtime Environment (build 11.0.1+13-Ubuntu-2ubuntu1)
OpenJDK 64-Bit Server VM (build 11.0.1+13-Ubuntu-2ubuntu1, mixed mode, sharing)

There is a matching upstream issue for this:

http://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8214284

In the comments for that issue, a second (fixed) issue is referenced:

https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8214002

The fix for that issue was merged to the jdk 12 and jdk branches:

http://hg.openjdk.java.net/jdk/jdk12/rev/7ed5edf6ba0c
http://hg.openjdk.java.net/jdk/jdk/rev/7ed5edf6ba0c

I build the jdk branch and found the issue fixed. I also rebuild the ubuntu package with the above mentioned patch included (only the change in freetypeScaler.c, not the new test) and also found, that this fixes my problem.

I don't know the plans for java in ubuntu regarding LTS releases and patch backports, but it would be great if you could include the patch. For the record: I did not write that patch, it is the referenced changeset above, modified to be applied while building the ubuntu package.

The attachment "font-fix.diff" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

tags: added: patch
tags: added: rls-cc-incoming
Changed in openjdk-lts (Ubuntu):
assignee: nobody → Tiago Stürmer Daitx (tdaitx)
Matthias Klose (doko) wrote :

fixed in 11.0.2 in disco.

Changed in openjdk-lts (Ubuntu):
status: Confirmed → Fix Released
Sebastien Bacher (seb128) wrote :

> fixed in 11.0.2 in disco.

no, it's not

openjdk-lts-11.0.2+9$ grep 'int renderFlags =' * -r
src/java.desktop/share/native/libfontmanager/freetypeScaler.c: int renderFlags = FT_LOAD_RENDER, target;

see http://hg.openjdk.java.net/jdk/jdk12/rev/7ed5edf6ba0c if the fix was included it should be FT_LOAD_DEFAULT

Changed in openjdk-lts (Ubuntu):
status: Fix Released → New
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package openjdk-lts - 11.0.2+9-3ubuntu1

---------------
openjdk-lts (11.0.2+9-3ubuntu1) disco; urgency=medium

  * Sync packages with 11.0.2+9-3:
    - Fix Zero on sparc64 (Adrian Glaubitz). Closes: #920315.
    - Link zero on alpha with --no-relax (Michael Cree). Addresses: #920161.
    - Don't run the tests on alpha, causing build failure.
    - jhsdb isn't built on alpha.
    - Backport the fix for 8214002 (cannot use italic font style if the font
      has embedded bitmap). LP: #1799014.
  * Sync packages with 11.0.2+9-2:
    - Fix file permissions for autopkg tests.

 -- Matthias Klose <email address hidden> Thu, 24 Jan 2019 15:14:20 +0100

Changed in openjdk-lts (Ubuntu):
status: New → Fix Released
Changed in freetype (Ubuntu):
status: Confirmed → Invalid
Changed in freetype (Ubuntu Bionic):
status: New → Invalid
Changed in freetype (Ubuntu Cosmic):
status: New → Invalid
no longer affects: freetype (Ubuntu)
no longer affects: freetype (Ubuntu Bionic)
no longer affects: freetype (Ubuntu Cosmic)
Changed in openjdk-lts (Ubuntu):
importance: Undecided → Medium
Changed in openjdk-lts (Ubuntu Bionic):
importance: Undecided → Medium
Changed in openjdk-lts (Ubuntu Cosmic):
importance: Undecided → Medium
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