Added pick device support

main.cpp

@@ -5,7 +5,7 @@
 
 namespace PB::Renderer
 {
-    void CleanupAllAndExit()
+    void CleanupAllAndExit(int code)
     {
         if (!GLFWManager::Cleanup())
             std::exit(EXIT_FAILURE);
@@ -13,7 +13,7 @@ namespace PB::Renderer
         if (VulkanManager::Cleanup())
             std::exit(EXIT_FAILURE);
 
-        std::exit(EXIT_SUCCESS);
+        std::exit(code);
     }
 }
 
@@ -29,17 +29,20 @@ int main()
     if (!window)
         return -1;
 
-    /* Creates the Vulkan instance and surface */
-    if (std::optional<VkInstance> instance = VulkanManager::Init(); !instance)
+    /* Runs Vulkan initialisation functions */
+    if (const std::optional<VkInstance> instance = VulkanManager::Init(); !instance)
     {
         GLFWManager::Cleanup();
-        return -1;
     }
 
-    if (std::optional<VkSurfaceKHR> surface = VulkanManager::CreateSurface(window); !surface)
+    if (const std::optional<VkSurfaceKHR> surface = VulkanManager::CreateSurface(window); !surface)
     {
-        CleanupAllAndExit();
-        return -1;
+        CleanupAllAndExit(EXIT_FAILURE);
+    }
+
+    if (!VulkanManager::PickPhysicalDevice())
+    {
+        CleanupAllAndExit(EXIT_FAILURE);
     }
 
     /* Polls window events whilst it is still open */
@@ -49,5 +52,5 @@ int main()
     }
 
     /* Cleans up GLFW and Vulkan */
-    CleanupAllAndExit();
+    CleanupAllAndExit(EXIT_SUCCESS);
 }

src/VulkanRenderer.h

@@ -12,3 +12,4 @@
 #include <iostream>
 #include <optional>
 #include <vector>
+#include <set>

src/managers/VulkanManager.cpp

@@ -5,6 +5,9 @@ namespace PB::Renderer
     std::optional<VkInstance> VulkanManager::s_Instance = std::nullopt;
     std::optional<VkSurfaceKHR> VulkanManager::s_Surface = std::nullopt;
 
+    VkPhysicalDevice VulkanManager::s_PhysicalDevice = VK_NULL_HANDLE;
+    QueueFamilyIndices VulkanManager::s_QueueIndices;
+
     std::optional<VkInstance> VulkanManager::Init()
     {
         /* Stops multi initialisation */
@@ -47,6 +50,12 @@ namespace PB::Renderer
 
     std::optional<VkSurfaceKHR> VulkanManager::CreateSurface(GLFWwindow* window)
     {
+        if (s_Instance == std::nullopt)
+        {
+            std::cout << "PB::Renderer::VulkanManager::CreateSurface(): No Vulkan instance" << std::endl;
+            return std::nullopt;
+        }
+
         VkSurfaceKHR surface;
         if (glfwCreateWindowSurface(s_Instance.value(), window, nullptr, &surface) != VK_SUCCESS)
         {
@@ -54,9 +63,130 @@ namespace PB::Renderer
             return std::nullopt;
         }
 
+        s_Surface = surface;
         return surface;
     }
 
+    bool VulkanManager::PickPhysicalDevice()
+    {
+        if (s_Instance == std::nullopt || s_Surface == std::nullopt)
+        {
+            std::cout << "PB::Renderer::VulkanManager::PickPhysicalDevice(): No Vulkan instance or surface" << std::endl;
+            return false;
+        }
+
+        const VkInstance& instance = s_Instance.value();
+        const VkSurfaceKHR& surface = s_Surface.value();
+
+        uint32_t deviceCount = 0;
+        vkEnumeratePhysicalDevices(instance, &deviceCount, nullptr);
+        if (deviceCount == 0)
+        {
+            std::cout << "PB::Renderer::VulkanManager::PickPhysicalDevice(): No GPU with Vulkan support" << std::endl;
+            return false;
+        }
+
+        std::vector<VkPhysicalDevice> devices(deviceCount);
+        vkEnumeratePhysicalDevices(instance, &deviceCount, devices.data());
+
+        for (const auto& device : devices)
+        {
+            if (IsDeviceSuitable(device, surface))
+            {
+                s_PhysicalDevice = device;
+                s_QueueIndices = FindQueueFamilies(device, surface);
+
+                VkPhysicalDeviceProperties deviceProperties;
+                vkGetPhysicalDeviceProperties(device, &deviceProperties);
+
+                std::cout << "Selected GPU: "<< deviceProperties.deviceName << std::endl;
+
+                return true;
+            }
+        }
+
+        std::cout << "Failed to find a suitable GPU" << std::endl;
+        return false;
+    }
+
+    bool VulkanManager::IsDeviceSuitable(VkPhysicalDevice device, VkSurfaceKHR surface)
+    {
+        const QueueFamilyIndices indices = FindQueueFamilies(device, surface);
+
+        if (const bool extensionsSupported = CheckDeviceExtensionSupport(device); !extensionsSupported)
+            return false;
+
+        VkSurfaceCapabilitiesKHR capabilities;
+        uint32_t formatCount, presentCount;
+
+        vkGetPhysicalDeviceSurfaceCapabilitiesKHR(device, surface, &capabilities);
+        vkGetPhysicalDeviceSurfaceFormatsKHR(device, surface, &formatCount, nullptr);
+        vkGetPhysicalDeviceSurfacePresentModesKHR(device, surface, &presentCount, nullptr);
+        const bool swapChainAdequate = formatCount > 0 && presentCount > 0;
+
+        VkPhysicalDeviceProperties deviceProperties;
+        vkGetPhysicalDeviceProperties(device, &deviceProperties);
+
+        const bool discreteGPU = deviceProperties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU;
+        return indices.Complete() && swapChainAdequate && discreteGPU;
+    }
+
+    QueueFamilyIndices VulkanManager::FindQueueFamilies(VkPhysicalDevice device, VkSurfaceKHR surface)
+    {
+        QueueFamilyIndices indices;
+
+        uint32_t queueFamilyCount;
+        vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, nullptr);
+        std::vector<VkQueueFamilyProperties> queueFamilies(queueFamilyCount);
+        vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, queueFamilies.data());
+
+        int index = -1;
+        for (const auto& family : queueFamilies)
+        {
+            if (family.queueFlags & VK_QUEUE_GRAPHICS_BIT)
+            {
+                indices.graphicsFamily = index;
+            }
+
+            VkBool32 presentSupport = false;
+            vkGetPhysicalDeviceSurfaceSupportKHR(device, index, surface, &presentSupport);
+            if (presentSupport)
+            {
+                indices.presentFamily = index;
+            }
+
+            if (indices.Complete())
+            {
+                break;
+            }
+
+            index++;
+        }
+
+        return indices;
+    }
+
+    bool VulkanManager::CheckDeviceExtensionSupport(VkPhysicalDevice device)
+    {
+        const std::vector<const char*> REQUIRED_EXTENSIONS = {
+            VK_KHR_SWAPCHAIN_EXTENSION_NAME,
+        };
+
+        uint32_t extensionCount;
+        vkEnumerateDeviceExtensionProperties(device, nullptr, &extensionCount, nullptr);
+        std::vector<VkExtensionProperties> availableExtensions(extensionCount);
+        vkEnumerateDeviceExtensionProperties(device, nullptr, &extensionCount, availableExtensions.data());
+
+        std::set<std::string> required(REQUIRED_EXTENSIONS.begin(), REQUIRED_EXTENSIONS.end());
+        for (const auto& [extensionName, specVersion] : availableExtensions)
+        {
+            required.erase(extensionName);
+        }
+
+        return required.empty();
+
+    }
+
     bool VulkanManager::Cleanup()
     {
         if (s_Surface != std::nullopt)

src/managers/VulkanManager.h

@@ -4,16 +4,35 @@
 
 namespace PB::Renderer
 {
+    struct QueueFamilyIndices
+    {
+        std::optional<uint32_t> graphicsFamily = std::nullopt;
+        std::optional<uint32_t> presentFamily = std::nullopt;
+
+        [[nodiscard]] bool Complete() const
+        {
+            return graphicsFamily && presentFamily;
+        }
+    };
+
     class VulkanManager
     {
-        private:
-            static std::optional<VkInstance> s_Instance;
-            static std::optional<VkSurfaceKHR> s_Surface;
-
         public:
             static std::optional<VkInstance> Init();
             static bool Cleanup();
 
             static std::optional<VkSurfaceKHR> CreateSurface(GLFWwindow* window);
+            static bool PickPhysicalDevice();
+
+        private:
+            static bool IsDeviceSuitable(VkPhysicalDevice device, VkSurfaceKHR surface);
+            static QueueFamilyIndices FindQueueFamilies(VkPhysicalDevice device, VkSurfaceKHR surface);
+            static bool CheckDeviceExtensionSupport(VkPhysicalDevice device);
+
+            static std::optional<VkInstance> s_Instance;
+            static std::optional<VkSurfaceKHR> s_Surface;
+
+            static VkPhysicalDevice s_PhysicalDevice;
+            static QueueFamilyIndices s_QueueIndices;
     };
 }