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Details

Type: Bug
Resolution: Done
Priority: P2: Important
Fix Version/s: 6.2.5, 6.3.1, 6.4.0 Beta1
Affects Version/s: 6.2.3, 6.4.0
Component/s: GUI: Font handling
Labels:
None
Environment:
macOS 12.2

Platform/s:

macOS
Commits:
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)

Description

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: