main.cpp Example File | Qt GUI 5.12.8

- Qt 5.12
- Qt GUI
- Hello Vulkan Widget Example
- main.cpp Example File
- Qt 5.12.8 Reference Documentation

# main.cpp Example File

hellovulkanwidget/main.cpp

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     #include <QApplication>
     #include <QPlainTextEdit>
     #include <QVulkanInstance>
     #include <QLibraryInfo>
     #include <QLoggingCategory>
     #include <QPointer>
     #include "hellovulkanwidget.h"

     Q_LOGGING_CATEGORY(lcVk, "qt.vulkan")

     static QPointer<QPlainTextEdit> messageLogWidget;
     static QtMessageHandler oldMessageHandler = nullptr;

     static void messageHandler(QtMsgType msgType, const QMessageLogContext &logContext, const QString &text)
     {
         if (!messageLogWidget.isNull())
             messageLogWidget->appendPlainText(text);
         if (oldMessageHandler)
             oldMessageHandler(msgType, logContext, text);
     }

     int main(int argc, char *argv[])
     {
         QApplication app(argc, argv);

         messageLogWidget = new QPlainTextEdit(QLatin1String(QLibraryInfo::build()) + QLatin1Char('\n'));
         messageLogWidget->setReadOnly(true);

         oldMessageHandler = qInstallMessageHandler(messageHandler);

         QLoggingCategory::setFilterRules(QStringLiteral("qt.vulkan=true"));

         QVulkanInstance inst;

     #ifndef Q_OS_ANDROID
         inst.setLayers(QByteArrayList() << "VK_LAYER_LUNARG_standard_validation");
     #else
         inst.setLayers(QByteArrayList()
                        << "VK_LAYER_GOOGLE_threading"
                        << "VK_LAYER_LUNARG_parameter_validation"
                        << "VK_LAYER_LUNARG_object_tracker"
                        << "VK_LAYER_LUNARG_core_validation"
                        << "VK_LAYER_LUNARG_image"
                        << "VK_LAYER_LUNARG_swapchain"
                        << "VK_LAYER_GOOGLE_unique_objects");
     #endif

         if (!inst.create())
             qFatal("Failed to create Vulkan instance: %d", inst.errorCode());

         VulkanWindow *vulkanWindow = new VulkanWindow;
         vulkanWindow->setVulkanInstance(&inst);

         MainWindow mainWindow(vulkanWindow, messageLogWidget.data());
         QObject::connect(vulkanWindow, &VulkanWindow::vulkanInfoReceived, &mainWindow, &MainWindow::onVulkanInfoReceived);
         QObject::connect(vulkanWindow, &VulkanWindow::frameQueued, &mainWindow, &MainWindow::onFrameQueued);

         mainWindow.resize(1024, 768);
         mainWindow.show();

         return app.exec();
     }