Revision control
++ // Copyright (C) 2018 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++ #include <QGuiApplication>
++ #include <QVulkanDeviceFunctions>
++ #include <QVulkanWindow>
++
++ namespace src_gui_vulkan_qvulkanwindow {
++ VkCommandBuffer commandBuffer;
++ const VkRenderPassBeginInfo *renderPassBegin = nullptr;
++ VkSubpassContents contents;
++ //! [0]
++ class VulkanRenderer : public QVulkanWindowRenderer
++ {
++ public:
++ VulkanRenderer(QVulkanWindow *w) : m_window(w), m_devFuncs(nullptr) { }
++
++ 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(commandBuffer, renderPassBegin, contents);
++ // ...
++ 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({ "VK_LAYER_KHRONOS_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 {
++ void startNextFrame();
++ // ...
++
++ VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT];
++ QVulkanWindow *m_window = nullptr;
++ };
++
++ void Renderer::startNextFrame()
++ {
++ VkDescriptorBufferInfo &uniformBufInfo(m_uniformBufInfo[m_window->currentFrame()]);
++ // ...
++ }
++ //! [1]
++
++ } // src_gui_vulkan_qvulkanwindow
++
++
++ namespace src_gui_vulkan_qvulkanwindow2 {
++
++ //! [2]
++ class Renderer {
++ void startNextFrame();
++ // ...
++
++ VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT];
++ QVulkanWindow *m_window = nullptr;
++ };
++
++ void Renderer::startNextFrame()
++ {
++ const int count = m_window->concurrentFrameCount();
++ // for (int i = 0; i < count; ++i)
++ // m_uniformBufInfo[i] = ...
++ // ...
++ }
++ //! [2]
++
++ } // src_gui_vulkan_qvulkanwindow2