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[Bug 1310017] Re: freetype 2.5.x broke rendering of the default Korean font

 

I have an issue with this patch (fix-incorrect-korean-fonts-
rendering.patch). It claims to apply

http://git.savannah.gnu.org/cgit/freetype/freetype2.git/patch/?id=98e510ee94e552e9e9f80891aa87b2b472d0f276

but it does not. It applies the above patch, but also runs

src/autofit$ perl ../tools/afblue.pl afblue.dat < afblue.hin > afblue.h

to regenerate the afblue.h. However, it does not also re-generate
afblue.c. The re-generation is itself suspect, as this appears to have
been run without FreeType commits

991cbcce97527e74ca3751dd04b89e393420549c
c46fa86bd585639bf4311809ba561675267e99af
741f736662476403cbcac3b9bf0756134f53ce1b
6dce136937ab8c436413ce617ffb5ddb329f3ecc
181fd071ee58b4b59257a2a162ea0a928057aa8d

which would bring afblue.pl up to date with this change. It would be
nice if afblue.c and afblue.h were generated as part of the build to
avoid these sorts of issues, but the initial check-in
(8b8be78385a2e564ebd62983512b81e541dff622) indicates this was not done
to avoid a perl build dependency.

I would like to request that this patch be re-built to match the
FreeType commit. Particularly that after the re-built patch is applied
the src/autofit/afblue.h file look as much like
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/plain/src/autofit/afblue.h?id=98e510ee94e552e9e9f80891aa87b2b472d0f276
as possible. Equivalently the output of

git diff trusty:src/autofit/afblue.h
98e510ee94e552e9e9f80891aa87b2b472d0f276:src/autofit/afblue.h

should have no material differences.

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https://bugs.launchpad.net/bugs/1310017

Title:
  freetype 2.5.x broke rendering of the default Korean font

Status in FreeType: High Quality Font Rendering:
  Unknown
Status in “freetype” package in Ubuntu:
  Fix Released
Status in “freetype” source package in Trusty:
  Fix Released

Bug description:
  * Impact:
  The rendering of Ubuntu's default Korean font(NanumGothic) is incorrect.
  The most seen sympton is character's upmost part is not shown and it can make impossible to read or confused with different character(ex: 줄 & 출).

  * Test case:
  Copy and paste '를' to gedit.
  Open gucharmap, find 를 (U+B97C), and see character in [Character Details] tab.
  Compare it. Upmost horizontal line should apear properly in gedit like as gucharmap's detailed view.

  Change account name to '를' and logout.
  See account name show properly in greeter.

  * Regression potential:
  check that text rendering is fine in the greeter and session, using different fonts and locales

  -------

  ubuntu-settings overrides org.gnome.settings-
  daemon.plugins.xsettings.hinting to "slight" , while GNOME default was
  "medium". This broke rendering of NanumGothic, the default font for
  Korean language, in default installation.

  I have no idea on what ground this value has been overridden, but it
  critically broke Korean language desktop.

  screenshots from #1303572

  14.04 https://launchpadlibrarian.net/172899667/1404_font.jpg

  12.04
  https://bugs.launchpad.net/ubuntu/+bug/1303572/+attachment/4084748/+files/1204_font.jpg

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