#include <QApplication>

#include <QDebug>
#include <QFontDatabase>
#include <QLabel>
#include <QPainter>
#include <QPixmap>

#include <stdio.h>

int main(int argc, char *argv[])
{
    qputenv("QT_QPA_PLATFORM", "windows:fontengine=freetype");

    QApplication a(argc, argv);

    QFontDatabase database;

    QPixmap pixmap(100, 100);
    QPainter painter(&pixmap);

    for (QString fontFamily : database.families())
    {
        QFont font(fontFamily);

        painter.setFont(font);

        painter.drawText(0, 0, QString("test"));
    }

    FILE *file = fopen(a.applicationFilePath().toLatin1().constData(), "rb");

    QLabel label(file ? "file opened" : "FILE OPEN FAILED");

    if (file)
    {
        fclose(file);
    }

    label.show();

    return a.exec();
}