인스턴스 생성 구조 완료

include/precomp.h

@@ -2,7 +2,10 @@
 #include <cmath>
 #include <cstdint>
 #include <cstdlib>
+#include <functional>
 #include <glm/glm.hpp>
 #include <gsl/gsl>
 #include <string>
 #include <string_view>
+
+#include "utilities.h"

include/utilities.h

@@ -0,0 +1,5 @@
+#pragma once
+
+namespace veng {
+bool streq(gsl::czstring left, gsl::czstring right);
+}

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_;

src/utilities.cpp

@@ -0,0 +1,9 @@
+#include "utilities.h"
+
+#include "precomp.h"
+
+namespace veng {
+bool streq(gsl::czstring left, gsl::czstring right) {
+  return std::strcmp(left, right) == 0;
+}
+}  // namespace veng

src/vulkan/graphics.cpp

@@ -18,6 +18,7 @@ void Graphics::InitializeVulkan() { CreateInstance(); }
 
 void Graphics::CreateInstance() {
   gsl::span<gsl::czstring> suggested_extentions = GetSuggestedExtentions();
+  if (!AreAllExtensionsSupported(suggested_extentions)) std::exit(EXIT_FAILURE);
 
   VkApplicationInfo app_info = {};
   app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
@@ -48,4 +49,36 @@ gsl::span<gsl::czstring> Graphics::GetSuggestedExtentions() {
   return {glfw_extentions, glfw_extention_count};
 }
 
+std::vector<VkExtensionProperties> Graphics::GetSupprotedInstanceExtensions() {
+  VkExtensionProperties buffer[32];
+  std::uint32_t count;
+  vkEnumerateInstanceExtensionProperties(nullptr, &count, nullptr);
+
+  if (count == 0) return {};
+
+  std::vector<VkExtensionProperties> properties(count);
+  vkEnumerateInstanceExtensionProperties(nullptr, &count, properties.data());
+  return properties;
+}
+
+bool ExtentionMatchesName(gsl::czstring name,
+                          const VkExtensionProperties& properties) {
+  return streq(properties.extensionName, name);
+}
+
+bool IsExtensionSupported(gsl::span<VkExtensionProperties> extensions,
+                          gsl::czstring name) {
+  return std::any_of(extensions.begin(), extensions.end(),
+                     std::bind_front(ExtentionMatchesName, name));
+}
+
+bool Graphics::AreAllExtensionsSupported(gsl::span<gsl::czstring> extensions) {
+  std::vector<VkExtensionProperties> supported_extensions =
+      GetSupprotedInstanceExtensions();
+
+  return std::all_of(
+      extensions.begin(), extensions.end(),
+      std::bind_front(IsExtensionSupported, supported_extensions));
+}
+
 }  // namespace veng