Big changes

engine/src/device.hpp

@@ -3,6 +3,7 @@
 #include <imgui_impl_vulkan.h>
 
 #include <cassert>
+#include <memory>
 #include <optional>
 #include <sophia/types.hpp>
 #include <vector>
@@ -31,12 +32,13 @@ struct SwapchainSupportDetails {
 
 class Device {
  public:
+  class Builder;
+
   Device(const Device&) = delete;
   Device& operator=(const Device&) = delete;
   Device(Device&&) = delete;
   Device& operator=(Device&&) = delete;
 
-  Device(Window& window);
   ~Device();
 
   const vk::Device* get() const {
@@ -85,6 +87,8 @@ class Device {
   vk::PhysicalDeviceProperties properties;
 
  private:
+  Device(Window* window);
+
   void setupDebugMessenger();
 
   bool checkValidationLayerSupport();
@@ -104,7 +108,7 @@ class Device {
   vk::UniqueInstance instance;
   VkDebugUtilsMessengerEXT debugMessenger;
 
-  Window& window;
+  const bool headless;
   vk::SurfaceKHR surface;
 
   vk::PhysicalDevice physicalDevice = VK_NULL_HANDLE;
@@ -123,8 +127,22 @@ class Device {
   const std::vector<const char*> enabledLayers = {
       "VK_LAYER_KHRONOS_validation"};
 #endif
-  const std::vector<const char*> enabledExtensions = {
-      VK_KHR_SWAPCHAIN_EXTENSION_NAME};
+  const std::vector<const char*> enabledExtensions;
+};
+
+class Device::Builder {
+ public:
+  Builder() = default;
+
+  Builder& withWindow(Window& window);
+  Builder& headless();
+
+  std::unique_ptr<Device> build() const;
+
+ private:
+  Window* window = nullptr;
+  bool headlessRequested = false;
+  bool modeSet = false;
 };
 
 }  // namespace sophia