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  1. Qt
  2. QTBUG-100666

FreeType font backend fails to select font style when a single font file contains multiple font faces

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    • macOS
    • af875e88f4 (qt/qtbase/dev) 68c17c6fec (qt/qtbase/6.3) 714bb09d55 (qt/qtbase/6.2) 714bb09d55 (qt/tqtc-qtbase/6.2) 68c17c6fec (qt/tqtc-qtbase/6.3) af875e88f4 (qt/tqtc-qtbase/dev)

      When a single font file contains multiple font faces (e.g. Regular, Light, Medium, etc.), the FreeType font backend fails to select them on macOS.

      For example when requesting the “Light” variant of the macOS system font “Avenir” (/System/Library/Fonts/Avenir.ttc), Qt renders the “Book” variant instead of the “Light” variant.

      Reproduction (run with argument -platform cocoa:fontengine=freetype):

      #include <QGuiApplication>
#include <QFont>
#include <QFontInfo>
#include <QDebug>


int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QFont font("Avenir");
    font.setStyleName("Light");
    font.setPixelSize(12);

    QFontInfo info(font);
    qDebug() << info.family() << info.styleName();
}

      Actual output:

      qt.qpa.fonts: Populating font family aliases took 92 ms. Replace uses of missing font family "Avenir" with one that exists to avoid this cost. 
"Avenir" "Book"

      Expected output:

      "Avenir" "Light"

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            esabraha Eskil Abrahamsen Blomfeldt
            nikwen Niklas Wenzel
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              Created:
              Updated:
              Resolved:

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