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  1. Qt
  2. QTBUG-104895

Text rendering letter-spacing error

    XMLWordPrintable

Details

    • Windows
    • 6b1044cc3 (dev), 97ca6c2a5 (tqtc/lts-6.2), 2cb26f7b6 (tqtc/lts-5.15)

    Description

      Simple text "base" renders incorrect using label:

      #include <QApplication>
#include <QLabel>

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    QLabel label("base");
    label.show();
    return a.exec();
}

       result is:

      Letter space between "ba" is too small, letter space between "as" is too large.

      Tested on Windows 10, both MinGW and MSVC. I checked default UI font using 

      QApplication::font().family()

      And result is "Microsoft YaHei UI".

      All UI text on QWidget have that problem, QtCreator also has the same problem. But QPlainTextEdit renders without problem.

      Attachments

        1. image-2022-07-12-15-06-01-804.png
          image-2022-07-12-15-06-01-804.png
          1 kB
        2. image-2022-11-20-06-35-25-748.png
          image-2022-11-20-06-35-25-748.png
          59 kB
        3. image-2022-11-20-06-40-12-360.png
          image-2022-11-20-06-40-12-360.png
          1 kB
        4. image-2022-11-20-06-40-59-004.png
          image-2022-11-20-06-40-59-004.png
          1 kB
        5. msyh.ttc
          18.74 MB
        6. msyhbd.ttc
          16.05 MB
        7. msyhl.ttc
          11.58 MB

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-120554 Text spacing changes between 5.15.10 and 5.15.16 versions

          • 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.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-108260 Qt6 Font Render Error on Some Font

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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          Activity

            People

              esabraha Eskil Abrahamsen Blomfeldt
              songziming Song Ziming
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              Dates

                Created:
                Updated:
                Resolved:

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