minor tweaks

Zhao Yuhang

2025-05-30 a4d0b98d40d0f740742e393db774ee53302ec64c

 examples/mainwindow/main.cpp

@@ -1,24 +1,34 @@
// Copyright (C) 2023-2024 Stdware Collections (https://www.github.com/stdware)
// Copyright (C) 2021-2023 wangwenx190 (Yuhang Zhao)
// SPDX-License-Identifier: Apache-2.0

#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("QT_WIN_DEBUG_CONSOLE", "attach");
    qputenv("QSG_INFO", "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
    //qputenv("QT_WIDGETS_HIGHDPI_DOWNSCALE", "1");
    //qputenv("QT_WIDGETS_RHI", "1");
    //qputenv("QSG_RHI_BACKEND", "d3d12");
    //qputenv("QSG_RHI_HDR", "scrgb");
    //qputenv("QT_QPA_DISABLE_REDIRECTION_SURFACE", "1");

#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
        Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
#endif
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
#endif

    QCoreApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
    QApplication a(argc, argv);

    MainWindow w;
    w.show();

    return a.exec();
}
}