Selecting logical devices en queues

Hello_triangle/main.cpp

@@ -1,7 +1,6 @@
 /*
     Following the vulkan tutorial on :
-    https://vulkan-tutorial.com/en/Drawing_a_triangle/Setup/Instance
-
+    https://vulkan-tutorial.com/en/Drawing_a_triangle/Presentation/Window_surface
 */
 
 #define GLFW_INCLUDE_VULKAN
@@ -12,8 +11,7 @@
 #include <vector>
 #include <cstring>
 #include <optional>
-
-
+    
 const uint32_t WIDTH = 800;
 const uint32_t HEIGHT = 600;
 
@@ -45,6 +43,9 @@ class HelloTriangleApplication{
         VkInstance instance;
         VkDebugUtilsMessengerEXT debugMessenger;
         VkPhysicalDevice physicalDevice = VK_NULL_HANDLE;
+        VkDevice device;
+        VkQueue graphicsQueue;
+
 
         void initWindow(){
             glfwInit();
@@ -59,8 +60,49 @@ class HelloTriangleApplication{
             createInstance();
             setupDebugMessenger();
             pickPhysicalDevice();
+            createLogicalDevice();
+
         }
 
+
+        void createLogicalDevice(){
+            QueueFamilyIndices indices = findQueueFamilies(physicalDevice);
+
+            VkDeviceQueueCreateInfo queueCreateInfo {};
+            queueCreateInfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
+            queueCreateInfo.queueFamilyIndex = indices.graphicsFamily.value();
+            queueCreateInfo.queueCount = 1;
+
+            float queuePriority = 1.0f;
+            queueCreateInfo.pQueuePriorities = &queuePriority;
+
+            VkPhysicalDeviceFeatures deviceFeatures{};
+
+
+            VkDeviceCreateInfo createInfo{};
+            createInfo.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
+            createInfo.queueCreateInfoCount = 1;
+            createInfo.pEnabledFeatures = &deviceFeatures;
+
+            createInfo.enabledExtensionCount = 0;
+            if(enableValidationLayers){
+                createInfo.enabledLayerCount = static_cast<uint32_t>(validationLayers.size());
+                createInfo.ppEnabledLayerNames = validationLayers.data();
+            } else{
+                createInfo.enabledLayerCount = 0 ;
+            }
+
+            if (vkCreateDevice(physicalDevice, &createInfo, nullptr, &device) != VK_SUCCESS){
+                throw std::runtime_error("failed to create logical device");
+            }
+
+
+            vkGetDeviceQueue(device, indices.graphicsFamily.value(), 0 , &graphicsQueue);
+
+        }
+
+
+
         void pickPhysicalDevice(){
             uint32_t deviceCount = 0;
             vkEnumeratePhysicalDevices(instance, &deviceCount, nullptr);
@@ -255,6 +297,7 @@ class HelloTriangleApplication{
         }
 
         void cleanup(){
+            vkDestroyDevice(device, nullptr);
             if(enableValidationLayers){
                 DestroyDebugUtilsMessengerEXT(instance, debugMessenger, nullptr);
             }