[Bug 1823461] Re: Font hinting lost on chrome like browser

[Gunnar Hjalmarsson]

Thanks for confirming! I have uploaded the fix to disco and bionic.

** Description changed:

+ [Impact]
+ 
+ The file for configuring Japanese rendering with Noto fonts does not
+ refer to the font family with sufficient precision, so it may affect
+ rendering with other fonts unintentionally. The proposed upload fixes
+ the issue.
+ 
+ [Test Case]
+ 
+ The real tests have been reported in comment #6 and #7 of this bug
+ report.
+ 
+ To verify that the modified file is properly installed:
+ 
+ 1. Install language-selector-common and language-selector-gnome from
+    bionic-proposed
+ 
+ 2. Run this command:
+ 
+ cat /etc/fonts/conf.avail/69-language-selector-ja.conf | grep 'Noto Sans
+ CJK JP'
+ 
+ (should output the line "<string>Noto Sans CJK JP</string>")
+ 
+ [Regression Potential]
+ 
+ That config file was added specifically for rendering Japanese with Noto
+ fonts, and the modified file has been confirmed by the original author.
+ Hence the regression risk should be low.
+ 
+ [Original description]
+ 
  Since Ubuntu 18.04 (maybe from 17.10, I don't remember now), Chrome
  browsers are horrible to use. Font hintings are not working as expected.
  There were always some hairy things above the fonts which caused me to
  abandon Ubuntu. Unfortunately, this bug affected all other Ubuntu
  derivatives as well. I was forced to use Debian and Manjaro, because
  nowhere in the Internet I found a solution.
  
  I've tested Ubuntu 19.04 again. I removed all of the *.conf file in
  `/etc/fonts/conf.d` dir and copied Manjaro's configs. The fonts are
  okay. Further investigating revealed that the culprit was symlink to
  this file `/etc/fonts/conf.avail/69-language-selector-ja.conf`
  
  I opened it and found that on Line no 8, it has this
  
  <test qual="all" name="family" compare="contains">
  
  which should instead be
  
  <test qual="all" name="lang" compare="contains">
  
  since `JP` is language identifier, not family.
  
  I manually fixed the file and all is well!
  
  I'm attaching two screenshot of chrome browser. Inspect the "Autofill"
  and "Appearance" word of the chrome setting page screenshot.

** Also affects: language-selector (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Changed in: language-selector (Ubuntu)
       Status: Confirmed => Fix Committed

** Changed in: language-selector (Ubuntu)
     Assignee: (unassigned) => Gunnar Hjalmarsson (gunnarhj)

** Changed in: language-selector (Ubuntu Bionic)
   Importance: Undecided => Medium

** Changed in: language-selector (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: language-selector (Ubuntu Bionic)
     Assignee: (unassigned) => Gunnar Hjalmarsson (gunnarhj)

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https://bugs.launchpad.net/bugs/1823461

Title:
  Font hinting lost on chrome like browser

Status in language-selector package in Ubuntu:
  Fix Committed
Status in language-selector source package in Bionic:
  In Progress

Bug description:
  [Impact]

  The file for configuring Japanese rendering with Noto fonts does not
  refer to the font family with sufficient precision, so it may affect
  rendering with other fonts unintentionally. The proposed upload fixes
  the issue.

  [Test Case]

  The real tests have been reported in comment #6 and #7 of this bug
  report.

  To verify that the modified file is properly installed:

  1. Install language-selector-common and language-selector-gnome from
     bionic-proposed

  2. Run this command:

  cat /etc/fonts/conf.avail/69-language-selector-ja.conf | grep 'Noto
  Sans CJK JP'

  (should output the line "<string>Noto Sans CJK JP</string>")

  [Regression Potential]

  That config file was added specifically for rendering Japanese with
  Noto fonts, and the modified file has been confirmed by the original
  author. Hence the regression risk should be low.

  [Original description]

  Since Ubuntu 18.04 (maybe from 17.10, I don't remember now), Chrome
  browsers are horrible to use. Font hintings are not working as
  expected. There were always some hairy things above the fonts which
  caused me to abandon Ubuntu. Unfortunately, this bug affected all
  other Ubuntu derivatives as well. I was forced to use Debian and
  Manjaro, because nowhere in the Internet I found a solution.

  I've tested Ubuntu 19.04 again. I removed all of the *.conf file in
  `/etc/fonts/conf.d` dir and copied Manjaro's configs. The fonts are
  okay. Further investigating revealed that the culprit was symlink to
  this file `/etc/fonts/conf.avail/69-language-selector-ja.conf`

  I opened it and found that on Line no 8, it has this

  <test qual="all" name="family" compare="contains">

  which should instead be

  <test qual="all" name="lang" compare="contains">

  since `JP` is language identifier, not family.

  I manually fixed the file and all is well!

  I'm attaching two screenshot of chrome browser. Inspect the "Autofill"
  and "Appearance" word of the chrome setting page screenshot.

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