chore: baseline usable version

libs/qwindowkit/examples/mainwindow/main.cpp

@@ -0,0 +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 "mainwindow.h"
+
+int main(int argc, char *argv[]) {
+    qputenv("QT_WIN_DEBUG_CONSOLE", "attach");
+    qputenv("QSG_INFO", "1");
+    //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();
+}