Recent changes to 2397: Bad kerning with pngcairo and gnuplot 5.4.1

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Vatsal Garg — Tue, 05 Apr 2022 09:57:24 -0000

Thanks @tmacchant3. It worked.
What I did earlier was to change the environmental variable after installing gnuplot. But now I changed the environmental variable before installing and there are no font issues as such (atleast for now XD)

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Tatsuro MATSUOKA — Tue, 05 Apr 2022 08:12:17 -0000

Hmm
Control Panel → System → Advanced → Environmental Variables and created a global variable PANGOCAIRO_BACKEND and set its value to fc
The above is correct.

Can you confirm that PANGOCAIRO_BACKEND is "fc" on cmd.exe or power shell?

echo %PANGOCAIRO_BACKEND%

From some reason I did not use global Environmental Variables setteing.

Tempral setting of Environmental Variable can be carried out by set commad.

Script

# test2.
set term pngcairo
set output 'test.png'
pl sin(x)
set output

From cmd promt

set PANGOCAIRO_BACKEND=win32
c:\Programs\gp543\bin\gnuplot test2.gp
copy test.png test_win32.png
set PANGOCAIRO_BACKEND=fc
c:\Programs\gp543\bin\gnuplot test2.gp
copy test.png test_fc.png

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Vatsal Garg — Tue, 05 Apr 2022 07:20:22 -0000

@tmacchant3 How do I go about setting the environmental variable? I have tried going to Control Panel → System → Advanced → Environmental Variables and created a global variable PANGOCAIRO_BACKEND and set its value to fc

However, the kerning issue still persisted. I didn't face a similar issue in version 5.2.8. Do you think that I should revert to that version before this issue is fixed?

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Tatsuro MATSUOKA — Mon, 21 Mar 2022 15:53:06 -0000

If I set PANGOCAIRO_BACKEND=fc , it seems be better.

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Ethan Merritt — Fri, 11 Jun 2021 20:43:37 -0000

status: open --> open-upstream-bug

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Bastian Märkisch — Sat, 16 Jan 2021 21:21:31 -0000

It's getting worse. After updating MSYS2, pango is now at version 1.48.2. Results attached.

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Bastian Märkisch — Sat, 16 Jan 2021 21:19:24 -0000

labels: Windows, pango --> Windows, pango, cairo

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Bastian Märkisch — Sat, 16 Jan 2021 17:55:20 -0000

As far as I can tell, the pango version in the binary Windows release should be 1.46.1.

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Bastian Märkisch — Sat, 16 Jan 2021 17:53:02 -0000

labels: --> Windows, pango
Group: -->
Priority: -->

#2397 Bad kerning with pngcairo and gnuplot 5.4.1

Gabriel Dupras — Fri, 15 Jan 2021 03:29:35 -0000

Thank you for your reply and the links. In one of those links, I've found the following comment:

As of Aug. 24, 2020, the version of Pango on homebrew is 1.46.1 and this bug seems to have been fixed. Doing a clean installation of Gnuplot and Pango via homebrew should solve this problem.

https://stackoverflow.com/a/63564204/12424992

Would it be possible to incorporate this newer version of pango into gnuplot? That is, if it actually solves the problem. I don't know how to test this myself.