qt5base-lts/examples/vulkan/hellovulkantriangle/main.cpp

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#include <QGuiApplication>
#include <QVulkanInstance>
#include <QLoggingCategory>
#include "../shared/trianglerenderer.h"

Q_LOGGING_CATEGORY(lcVk, "qt.vulkan")

class VulkanWindow : public QVulkanWindow
{
public:
    QVulkanWindowRenderer *createRenderer() override;
};

QVulkanWindowRenderer *VulkanWindow::createRenderer()
{
    return new TriangleRenderer(this, true); // try MSAA, when available
}

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

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

    QVulkanInstance inst;
    inst.setLayers({ "VK_LAYER_KHRONOS_validation" });

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

    VulkanWindow w;
    w.setVulkanInstance(&inst);

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

    return app.exec();
}