-extern VkSwapchainKHR vkswapchain;
-extern VkImage *vkswapchain_images;
-extern VkSurfaceKHR vksurface;
-extern VkInstance vkinst;
-extern VkPhysicalDevice vkpdev;
-extern VkDevice vkdev;
-extern VkQueue vkq;
-extern VkCommandPool vkcmdpool;
-extern VkCommandBuffer vkcmdbuf; /* primary command buffer */
-extern int vkqfamily;
-extern int vknext_swapchain_image;
+extern VkPhysicalDevice vk_physical;
+extern VkDevice vk_device;
+extern VkCommandPool vk_pool;
+extern VkQueue vk_queue;
+extern VkSwapchainKHR vk_swapchain;
+extern VkSurfaceKHR vk_surface;
+extern VkInstance vk_instance;
+extern int vk_qfamily;
+extern VkDescriptorPool vk_dpool;