1 files changed, 132 insertions, 0 deletions
diff --git a/src/gui/doc/snippets/code/src_gui_vulkan_qvulkanwindow.cpp b/src/gui/doc/snippets/code/src_gui_vulkan_qvulkanwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+  class VulkanRenderer : public QVulkanWindowRenderer
+  {
+  public:
+      VulkanRenderer(QVulkanWindow *w) : m_window(w) { }
+
+      void initResources() override
+      {
+          m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device());
+          ...
+      }
+      void initSwapChainResources() override { ... }
+      void releaseSwapChainResources() override { ... }
+      void releaseResources() override { ... }
+
+      void startNextFrame() override
+      {
+          VkCommandBuffer cmdBuf = m_window->currentCommandBuffer();
+          ...
+          m_devFuncs->vkCmdBeginRenderPass(...);
+          ...
+          m_window->frameReady();
+      }
+
+  private:
+      QVulkanWindow *m_window;
+      QVulkanDeviceFunctions *m_devFuncs;
+  };
+
+  class VulkanWindow : public QVulkanWindow
+  {
+  public:
+      QVulkanWindowRenderer *createRenderer() override {
+          return new VulkanRenderer(this);
+      }
+  };
+
+  int main(int argc, char *argv[])
+  {
+      QGuiApplication app(argc, argv);
+
+      QVulkanInstance inst;
+      // enable the standard validation layers, when available
+      inst.setLayers(QByteArrayList() << "VK_LAYER_LUNARG_standard_validation");
+      if (!inst.create())
+          qFatal("Failed to create Vulkan instance: %d", inst.errorCode());
+
+      VulkanWindow w;
+      w.setVulkanInstance(&inst);
+      w.showMaximized();
+
+      return app.exec();
+  }
+//! [0]
+
+//! [1]
+    class Renderer {
+        ...
+        VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT];
+    };
+
+    void Renderer::startNextFrame()
+    {
+        VkDescriptorBufferInfo &uniformBufInfo(m_uniformBufInfo[m_window->currentFrame()]);
+        ...
+    }
+//! [1]
+
+//! [2]
+    class Renderer {
+        ...
+        VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT];
+    };
+
+    void Renderer::startNextFrame()
+    {
+        const int count = m_window->concurrentFrameCount();
+        for (int i = 0; i < count; ++i)
+            m_uniformBufInfo[i] = ...
+        ...
+    }
+//! [2]