Method setupLogicalDevice

examples/vulkan/Vulkan.cpp:667–731

Setup logical device and device queue

    // Setup logical device and device queue
    void setupLogicalDevice()
    {
        // Select a queue family that supports graphics operations and surface presentation
        std::uint32_t objectCount = 0;

        std::vector<VkQueueFamilyProperties> queueFamilyProperties;

        vkGetPhysicalDeviceQueueFamilyProperties(gpu, &objectCount, nullptr);

        queueFamilyProperties.resize(objectCount);

        vkGetPhysicalDeviceQueueFamilyProperties(gpu, &objectCount, queueFamilyProperties.data());

        for (std::size_t i = 0; i < queueFamilyProperties.size(); ++i)
        {
            VkBool32 surfaceSupported = VK_FALSE;

            vkGetPhysicalDeviceSurfaceSupportKHR(gpu, static_cast<std::uint32_t>(i), surface, &surfaceSupported);

            if ((queueFamilyProperties[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) && (surfaceSupported == VK_TRUE))
            {
                queueFamilyIndex = static_cast<std::uint32_t>(i);
                break;
            }
        }

        if (!queueFamilyIndex.has_value())
        {
            vulkanAvailable = false;
            return;
        }

        const float queuePriority = 1.0f;

        VkDeviceQueueCreateInfo deviceQueueCreateInfo = VkDeviceQueueCreateInfo();
        deviceQueueCreateInfo.sType                   = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
        deviceQueueCreateInfo.queueCount              = 1;
        deviceQueueCreateInfo.queueFamilyIndex        = *queueFamilyIndex;
        deviceQueueCreateInfo.pQueuePriorities        = &queuePriority;

        // Enable the swapchain extension
        static constexpr std::array extensions = {VK_KHR_SWAPCHAIN_EXTENSION_NAME};

        // Enable anisotropic filtering
        VkPhysicalDeviceFeatures physicalDeviceFeatures = VkPhysicalDeviceFeatures();
        physicalDeviceFeatures.samplerAnisotropy        = VK_TRUE;

        VkDeviceCreateInfo deviceCreateInfo      = VkDeviceCreateInfo();
        deviceCreateInfo.sType                   = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
        deviceCreateInfo.enabledExtensionCount   = static_cast<std::uint32_t>(extensions.size());
        deviceCreateInfo.ppEnabledExtensionNames = extensions.data();
        deviceCreateInfo.queueCreateInfoCount    = 1;
        deviceCreateInfo.pQueueCreateInfos       = &deviceQueueCreateInfo;
        deviceCreateInfo.pEnabledFeatures        = &physicalDeviceFeatures;

        // Create our logical device
        if (vkCreateDevice(gpu, &deviceCreateInfo, nullptr, &device) != VK_SUCCESS)
        {