Add debug messenger and validation layers support

CMakeLists.txt

@@ -8,6 +8,8 @@ set(CMAKE_CXX_STANDARD 14)
 find_package(SDL2 REQUIRED)
 find_package(Vulkan REQUIRED)
 
+add_definitions(-DDEBUG)
+
 add_executable(Graph 
     src/main.cpp
     src/renderer.cpp)

include/renderer.h

@@ -9,10 +9,21 @@ public:
     
 private:
     void createInstance();
+#ifdef DEBUG
+    void createDebugMessenger();
+#endif
     void createLogicalDevice();
     
     VkInstance instance_ = nullptr;
     
+#ifdef DEBUG
+    bool enableDebug = false;
+    
+    PFN_vkCreateDebugUtilsMessengerEXT createMessenger_ = nullptr;
+    
+    VkDebugUtilsMessengerEXT messenger_ = nullptr;
+#endif
+    
     VkDevice device_ = nullptr;
     VkQueue graphicsQueue_ = nullptr;
 };

src/renderer.cpp

@@ -2,9 +2,14 @@
 
 #include <set>
 #include <vector>
+#include <iostream>
 
 Renderer::Renderer() {
     createInstance();
+#ifdef DEBUG
+    if(enableDebug)
+        createDebugMessenger();
+#endif
     createLogicalDevice();
 }
 
@@ -13,12 +18,64 @@ Renderer::~Renderer() {
 }
 
 void Renderer::createInstance() {
+    uint32_t layerCount = 0;
+    vkEnumerateInstanceLayerProperties(&layerCount, nullptr);
+    
+    VkLayerProperties* availableLayers = new VkLayerProperties[layerCount];
+    vkEnumerateInstanceLayerProperties(&layerCount, availableLayers);
+    
+    std::vector<const char*> enabledLayers;
+#ifdef DEBUG
+    for(uint32_t i = 0; i < layerCount; i++) {
+        if(!strcmp(availableLayers[i].layerName, "VK_LAYER_LUNARG_standard_validation"))
+            enabledLayers.push_back("VK_LAYER_LUNARG_standard_validation");
+    }
+#endif
+    
+    uint32_t extensionCount = 0;
+    vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, nullptr);
+    
+    VkExtensionProperties* availableExtensions = new VkExtensionProperties[extensionCount];
+    vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, availableExtensions);
+
+    std::vector<const char*> enabledExtensions;
+#ifdef DEBUG
+    for(uint32_t i = 0; i < extensionCount; i++) {
+        if(!strcmp(availableExtensions[i].extensionName, "VK_EXT_debug_utils")) {
+            enabledExtensions.push_back("VK_EXT_debug_utils");
+            enableDebug = true;
+        }
+    }
+#endif
+    
     VkInstanceCreateInfo instanceCreateInfo = {};
     instanceCreateInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
+    instanceCreateInfo.enabledLayerCount = enabledLayers.size();
+    instanceCreateInfo.ppEnabledLayerNames = enabledLayers.data();
+    instanceCreateInfo.enabledExtensionCount = enabledExtensions.size();
+    instanceCreateInfo.ppEnabledExtensionNames = enabledExtensions.data();
     
     vkCreateInstance(&instanceCreateInfo, nullptr, &instance_);
 }
 
+#ifdef DEBUG
+void Renderer::createDebugMessenger() {
+    createMessenger_ = (PFN_vkCreateDebugUtilsMessengerEXT)vkGetInstanceProcAddr(instance_, "vkCreateDebugUtilsMessengerEXT");
+    
+    VkDebugUtilsMessengerCreateInfoEXT messengerCreateInfo = {};
+    messengerCreateInfo.sType = VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT;
+    messengerCreateInfo.messageSeverity = VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT;
+    messengerCreateInfo.messageType = VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_PERFORMANCE_BIT_EXT;
+    messengerCreateInfo.pfnUserCallback = [](VkDebugUtilsMessageSeverityFlagBitsEXT, unsigned int, const VkDebugUtilsMessengerCallbackDataEXT* callback, void*) -> unsigned int {
+        std::cout << callback->pMessage << std::endl;
+        
+        return VK_SUCCESS;
+    };
+    
+    createMessenger_(instance_, &messengerCreateInfo, nullptr, &messenger_);
+}
+#endif
+
 void Renderer::createLogicalDevice() {
     uint32_t physicalDeviceCount = 0;
     vkEnumeratePhysicalDevices(instance_, &physicalDeviceCount, nullptr);