인스턴스 생성 구조 완료

include/vulkan/graphics.h

@@ -1,5 +1,6 @@
 #pragma once
 #include <vulkan/vulkan.h>
+
 #include "glfw/glfw_window.h"
 
 namespace veng {
@@ -12,7 +13,9 @@ class Graphics final {
   void InitializeVulkan();
   void CreateInstance();
 
-  gsl::span<gsl::czstring> GetSuggestedExtentions();
+  static gsl::span<gsl::czstring> GetSuggestedExtentions();
+  static std::vector<VkExtensionProperties> GetSupprotedInstanceExtensions();
+  static bool AreAllExtensionsSupported(gsl::span<gsl::czstring> extensions);
 
   VkInstance instance_ = nullptr;
   gsl::not_null<Window *> window_;