simplify code

Yuhang Zhao

2023-12-11 438327d56e7c88dd3fbee3d83223d29e5de90653

 examples/mainwindow/main.cpp

@@ -6,6 +6,12 @@
    qputenv("QT_WIN_DEBUG_CONSOLE", "1");
    qputenv("QSG_INFO", "1");
    qputenv("QT_WIDGETS_HIGHDPI_DOWNSCALE", "1");
#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);
    MainWindow w;