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

        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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