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Type: Bug
Resolution: Unresolved
Priority: P2: Important
Fix Version/s: None
Affects Version/s: 6.2.3, 6.3.0 Beta2, 6.4.0
Component/s: GUI: Font handling
Labels:
None
Environment:
Windows 10, MinGW Qt build

Platform/s:

Windows

Font selection via QFont::setStyleName() is broken on Windows.

QFontDatabase::styles("Arial") includes "Bold" as a valid style name. Yet, when requesting font family "Arial" with styleName "Bold", Qt renders "Arial" in the "Regular" style (= font weight 400).

Reproduction

import QtQuick
import QtQuick.Window

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Font Style Selection Broken")

    Text {
        text: "Arial Bold"
        anchors.centerIn: parent

        font {
            pixelSize: 72
            family: "Arial"
            styleName: "Bold"
        }
    }
}

More extensive example with more debug output attached (QML and plain C++).