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  1. Qt
  2. QTBUG-131574

Qt 6.8 displays some font families in DemiBold much thicker than with Qt6.7

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Details

    • Windows

    Description

      In Windows, Qt 6.8.0 displays some font families, e.g. Noto Sans, much thicker when setWeight(QFont::DemiBold) applied to them.  (See the attached screenshot)

      In some cases it prevents Qt application from displaying the same result as in Figma.

      • This issue is not observed with Qt 6.7.3.
      • This issue is not observed in Linux. (Ubuntu 24.04)
      • This issue is not observed with some font families, such as Times New Roman.

       

      The reproducer is attached.

      Attachments

        1. comparison_qt67_qt68_win_linux.png
          277 kB
          Hitoshi Ito
        2. Freetype_vs_GDI.png
          398 kB
          Hitoshi Ito
        3. main.cpp
          3 kB
          Hitoshi Ito

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-130861 QFont::DemiBold can behave differently with GDI compared to DirectWrite

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
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              esabraha Eskil Abrahamsen Blomfeldt
              hitoshiito Hitoshi Ito
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              Dates

                Created:
                Updated:
                Resolved:

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