main.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, you may use this file under the terms of the BSD license
 ** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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();
 }