1 files changed, 78 insertions, 0 deletions
diff --git a/examples/gui/rhiwindow/rhiwindow.h b/examples/gui/rhiwindow/rhiwindow.h
new file mode 100644
index 0000000000..520c3e8c0a
--- /dev/null
+++ b/examples/gui/rhiwindow/rhiwindow.h
@@ -0,0 +1,78 @@
+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <QWindow>
+#include <QOffscreenSurface>
+#include <rhi/qrhi.h>
+
+class RhiWindow : public QWindow
+{
+public:
+    RhiWindow(QRhi::Implementation graphicsApi);
+    QString graphicsApiName() const;
+    void releaseSwapChain();
+
+protected:
+    virtual void customInit() = 0;
+    virtual void customRender() = 0;
+
+    // destruction order matters to a certain degree: the fallbackSurface must
+    // outlive the rhi, the rhi must outlive all other resources.  The resources
+    // need no special order when destroying.
+#if QT_CONFIG(opengl)
+    std::unique_ptr<QOffscreenSurface> m_fallbackSurface;
+#endif
+    std::unique_ptr<QRhi> m_rhi;
+//! [swapchain-data]
+    std::unique_ptr<QRhiSwapChain> m_sc;
+    std::unique_ptr<QRhiRenderBuffer> m_ds;
+    std::unique_ptr<QRhiRenderPassDescriptor> m_rp;
+//! [swapchain-data]
+    bool m_hasSwapChain = false;
+    QMatrix4x4 m_viewProjection;
+
+private:
+    void init();
+    void resizeSwapChain();
+    void render();
+
+    void exposeEvent(QExposeEvent *) override;
+    bool event(QEvent *) override;
+
+    QRhi::Implementation m_graphicsApi;
+    bool m_initialized = false;
+    bool m_notExposed = false;
+    bool m_newlyExposed = false;
+};
+
+class HelloWindow : public RhiWindow
+{
+public:
+    HelloWindow(QRhi::Implementation graphicsApi);
+
+    void customInit() override;
+    void customRender() override;
+
+private:
+    void ensureFullscreenTexture(const QSize &pixelSize, QRhiResourceUpdateBatch *u);
+
+    std::unique_ptr<QRhiBuffer> m_vbuf;
+    std::unique_ptr<QRhiBuffer> m_ubuf;
+    std::unique_ptr<QRhiTexture> m_texture;
+    std::unique_ptr<QRhiSampler> m_sampler;
+    std::unique_ptr<QRhiShaderResourceBindings> m_colorTriSrb;
+    std::unique_ptr<QRhiGraphicsPipeline> m_colorPipeline;
+    std::unique_ptr<QRhiShaderResourceBindings> m_fullscreenQuadSrb;
+    std::unique_ptr<QRhiGraphicsPipeline> m_fullscreenQuadPipeline;
+
+    QRhiResourceUpdateBatch *m_initialUpdates = nullptr;
+
+    float m_rotation = 0;
+    float m_opacity = 1;
+    int m_opacityDir = -1;
+};
+
+#endif