Method setupPhysicalDevice

examples/vulkan/Vulkan.cpp:538–664

Select a GPU to use and query its capabilities

    // Select a GPU to use and query its capabilities
    void setupPhysicalDevice()
    {
        // Last sanity check
        if (!vkEnumeratePhysicalDevices || !vkCreateDevice || !vkGetPhysicalDeviceProperties)
        {
            vulkanAvailable = false;
            return;
        }

        // Retrieve list of GPUs
        std::uint32_t objectCount = 0;

        std::vector<VkPhysicalDevice> devices;

        if (vkEnumeratePhysicalDevices(instance, &objectCount, nullptr) != VK_SUCCESS)
        {
            vulkanAvailable = false;
            return;
        }

        devices.resize(objectCount);

        if (vkEnumeratePhysicalDevices(instance, &objectCount, devices.data()) != VK_SUCCESS)
        {
            vulkanAvailable = false;
            return;
        }

        VkPhysicalDeviceType deviceType = VK_PHYSICAL_DEVICE_TYPE_OTHER;

        // Look for a GPU that supports swapchains
        for (VkPhysicalDevice dev : devices)
        {
            VkPhysicalDeviceProperties deviceProperties;
            vkGetPhysicalDeviceProperties(dev, &deviceProperties);

            std::vector<VkExtensionProperties> extensions;

            if (vkEnumerateDeviceExtensionProperties(dev, nullptr, &objectCount, nullptr) != VK_SUCCESS)
            {
                vulkanAvailable = false;
                return;
            }

            extensions.resize(objectCount);

            if (vkEnumerateDeviceExtensionProperties(dev, nullptr, &objectCount, extensions.data()) != VK_SUCCESS)
            {
                vulkanAvailable = false;
                return;
            }

            bool supportsSwapchain = false;

            for (VkExtensionProperties& extension : extensions)
            {
                if (std::string_view(extension.extensionName) == VK_KHR_SWAPCHAIN_EXTENSION_NAME)
                {