1 files changed, 110 insertions, 0 deletions
diff --git a/examples/gui/rhiwindow/main.cpp b/examples/gui/rhiwindow/main.cpp
new file mode 100644
index 0000000000..37977e3a34
--- /dev/null
+++ b/examples/gui/rhiwindow/main.cpp
@@ -0,0 +1,110 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QGuiApplication>
+#include <QCommandLineParser>
+#include "rhiwindow.h"
+
+int main(int argc, char **argv)
+{
+    QGuiApplication app(argc, argv);
+
+    QRhi::Implementation graphicsApi;
+
+    // Use platform-specific defaults when no command-line arguments given.
+#if defined(Q_OS_WIN)
+    graphicsApi = QRhi::D3D11;
+#elif QT_CONFIG(metal)
+    graphicsApi = QRhi::Metal;
+#elif QT_CONFIG(vulkan)
+    graphicsApi = QRhi::Vulkan;
+#else
+    graphicsApi = QRhi::OpenGLES2;
+#endif
+
+    QCommandLineParser cmdLineParser;
+    cmdLineParser.addHelpOption();
+    QCommandLineOption nullOption({ "n", "null" }, QLatin1String("Null"));
+    cmdLineParser.addOption(nullOption);
+    QCommandLineOption glOption({ "g", "opengl" }, QLatin1String("OpenGL"));
+    cmdLineParser.addOption(glOption);
+    QCommandLineOption vkOption({ "v", "vulkan" }, QLatin1String("Vulkan"));
+    cmdLineParser.addOption(vkOption);
+    QCommandLineOption d3d11Option({ "d", "d3d11" }, QLatin1String("Direct3D 11"));
+    cmdLineParser.addOption(d3d11Option);
+    QCommandLineOption d3d12Option({ "D", "d3d12" }, QLatin1String("Direct3D 12"));
+    cmdLineParser.addOption(d3d12Option);
+    QCommandLineOption mtlOption({ "m", "metal" }, QLatin1String("Metal"));
+    cmdLineParser.addOption(mtlOption);
+
+    cmdLineParser.process(app);
+    if (cmdLineParser.isSet(nullOption))
+        graphicsApi = QRhi::Null;
+    if (cmdLineParser.isSet(glOption))
+        graphicsApi = QRhi::OpenGLES2;
+    if (cmdLineParser.isSet(vkOption))
+        graphicsApi = QRhi::Vulkan;
+    if (cmdLineParser.isSet(d3d11Option))
+        graphicsApi = QRhi::D3D11;
+    if (cmdLineParser.isSet(d3d12Option))
+        graphicsApi = QRhi::D3D12;
+    if (cmdLineParser.isSet(mtlOption))
+        graphicsApi = QRhi::Metal;
+
+ //! [api-setup]
+    // For OpenGL, to ensure there is a depth/stencil buffer for the window.
+    // With other APIs this is under the application's control (QRhiRenderBuffer etc.)
+    // and so no special setup is needed for those.
+    QSurfaceFormat fmt;
+    fmt.setDepthBufferSize(24);
+    fmt.setStencilBufferSize(8);
+    // Special case macOS to allow using OpenGL there.
+    // (the default Metal is the recommended approach, though)
+    // gl_VertexID is a GLSL 130 feature, and so the default OpenGL 2.1 context
+    // we get on macOS is not sufficient.
+#ifdef Q_OS_MACOS
+    fmt.setVersion(4, 1);
+    fmt.setProfile(QSurfaceFormat::CoreProfile);
+#endif
+    QSurfaceFormat::setDefaultFormat(fmt);
+
+    // For Vulkan.
+#if QT_CONFIG(vulkan)
+    QVulkanInstance inst;
+    if (graphicsApi == QRhi::Vulkan) {
+        // Request validation, if available. This is completely optional
+        // and has a performance impact, and should be avoided in production use.
+        inst.setLayers({ "VK_LAYER_KHRONOS_validation" });
+        // Play nice with QRhi.
+        inst.setExtensions(QRhiVulkanInitParams::preferredInstanceExtensions());
+        if (!inst.create()) {
+            qWarning("Failed to create Vulkan instance, switching to OpenGL");
+            graphicsApi = QRhi::OpenGLES2;
+        }
+    }
+#endif
+//! [api-setup]
+
+    HelloWindow window(graphicsApi);
+
+#if QT_CONFIG(vulkan)
+    if (graphicsApi == QRhi::Vulkan)
+        window.setVulkanInstance(&inst);
+#endif
+    window.resize(1280, 720);
+    window.setTitle(QCoreApplication::applicationName() + QLatin1String(" - ") + window.graphicsApiName());
+    window.show();
+
+    int ret = app.exec();
+
+    // RhiWindow::event() will not get invoked when the
+    // PlatformSurfaceAboutToBeDestroyed event is sent during the QWindow
+    // destruction. That happens only when exiting via app::quit() instead of
+    // the more common QWindow::close(). Take care of it: if the QPlatformWindow
+    // is still around (there was no close() yet), get rid of the swapchain
+    // while it's not too late.
+    if (window.handle())
+        window.releaseSwapChain();
+
+    return ret;
+}