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Incorrect text kerning on Windows

Text has incorrect kerning on Windows.

Steps to reproduce

  1. Install MSYS2 on Windows 11
  2. Install GTK dependencies with pacman -S mingw-w64-x86_64-gtk4 mingw-w64-x86_64-pkgconf mingw-w64-x86_64-gcc
  3. Add these entries to the system's PATH environment variable:
C:\msys64\mingw64\include
C:\msys64\mingw64\bin
C:\msys64\mingw64\lib
  1. Run gtk4-demo

Current behavior

This is the screenshot of the gt4-demo: Screenshot_2022-10-13_084439

And here's another screenshot of one of the gtk-rs demos where it's more apparent: Screenshot_2022-10-12_184109

Expected outcome

Correct text kerning

Version information

  • I'm on an up-to-date version of Windows 11. I haven't tested if this issue is present in Windows 10, but I imagine it is.
  • I'm using whatever gtk version is comes with the mingw-w64-x86_64-gtk4 package.
  • My GPU is an NVIDIA GT 710 with the latest driver that is available for it (version 473.81)

Additional information

The only output from the terminal I get while running the gtk4-demo is

** Message: 09:05:41.923: For syntax highlighting, install the "highlight" program