Add QtContext WinIdChange workaround

Sine Striker

2023-12-18 d3d7430ec9afb94abaf78fa2c9edd9d9f946881c

 examples/mainwindow/main.cpp

@@ -1,13 +1,31 @@
#include <QApplication>
#include <QtWidgets/QApplication>
#include <QtGui/QFont>
#include <QtCore/QDebug>

#include "mainwindow.h"

int main(int argc, char *argv[]) {
    qputenv("QT_WIN_DEBUG_CONSOLE", "1");
    qputenv("QSG_INFO", "1");
    qputenv("QT_WIDGETS_HIGHDPI_DOWNSCALE", "1");
    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
#if 0
    qputenv("QT_WIDGETS_RHI", "1");
    qputenv("QSG_RHI_BACKEND", "d3d12");
    qputenv("QSG_RHI_HDR", "scrgb");
    qputenv("QT_QPA_DISABLE_REDIRECTION_SURFACE", "1");
#endif

    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
        Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
    QApplication a(argc, argv);

#ifdef Q_OS_WINDOWS
    a.setFont([]() {
        QFont f(QStringLiteral("Microsoft YaHei UI"));
        f.setPixelSize(15);
        return f;
    }());
#endif

    MainWindow w;
    w.show();
    return a.exec();