Added Vulkan game window too

src/engine/gameengine.cpp

@@ -0,0 +1,40 @@
+#include "gameengine.h"
+
+#include <QVulkanInstance>
+#include <QEventLoop>
+
+#include "closeeventfilter.h"
+
+GameEngine::GameEngine(const ProjectContainer &project, QObject *parent) :
+    QObject{parent},
+    m_project{project},
+    m_glGameWindow{m_project},
+    m_vulkanGameWindow{m_project}
+{
+    m_vulkanInstance.setLayers(QByteArrayList { "VK_LAYER_LUNARG_standard_validation" });
+
+    if (!m_vulkanInstance.create())
+        qFatal("Failed to create Vulkan instance: %d", m_vulkanInstance.errorCode());
+
+    m_vulkanGameWindow.setVulkanInstance(&m_vulkanInstance);
+}
+
+void GameEngine::run()
+{
+    m_glGameWindow.setTitle(tr("Game Window - OpenGL"));
+    m_vulkanGameWindow.setTitle(tr("Game Window - Vulkan"));
+
+    CloseEventFilter closeEventFilter;
+
+    m_glGameWindow.installEventFilter(&closeEventFilter);
+    m_vulkanGameWindow.installEventFilter(&closeEventFilter);
+
+    QEventLoop eventLoop;
+    connect(&closeEventFilter, &CloseEventFilter::closeEventReceived,
+            &eventLoop, &QEventLoop::quit);
+
+    m_glGameWindow.show();
+    m_vulkanGameWindow.show();
+
+    eventLoop.exec();
+}