Fix imgui support + update README.md

src/frontend/App.cpp

@@ -9,7 +9,7 @@ void App::Run() {
   while (!done) {
     SDL_Event event;
     while (SDL_PollEvent(&event)) {
-      //ImGui_ImplSDL2_ProcessEvent(&event);
+      ImGui_ImplSDL2_ProcessEvent(&event);
       switch(event.type) {
         case SDL_QUIT: done = true; break;
         case SDL_WINDOWEVENT:

src/frontend/imgui/Window.cpp

@@ -4,10 +4,12 @@
 #include <Core.hpp>
 #include <utility>
 
+VkInstance instance{};
+
 Window::Window(n64::Core& core) {
   InitSDL();
   InitParallelRDP(core.mem.GetRDRAM(), window);
-  //InitImgui();
+  InitImgui();
   NFD::Init();
 }
 
@@ -61,6 +63,8 @@ void Window::InitImgui() {
   allocator = nullptr;
   minImageCount = 2;
 
+  ImGui_ImplVulkan_LoadFunctions([](const char* function_name, void*) { return vkGetInstanceProcAddr(instance, function_name); });
+
   {
     VkDescriptorPoolSize poolSizes[] = {
       { VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
@@ -168,9 +172,9 @@ void Window::InitImgui() {
 Window::~Window() {
   VkResult err = vkDeviceWaitIdle(device);
   check_vk_result(err);
-  //ImGui_ImplVulkan_Shutdown();
-  //ImGui_ImplSDL2_Shutdown();
-  //ImGui::DestroyContext();
+  ImGui_ImplVulkan_Shutdown();
+  ImGui_ImplSDL2_Shutdown();
+  ImGui::DestroyContext();
   vkDestroyDescriptorPool(device, descriptorPool, nullptr);
   vkDestroyDevice(device, nullptr);
   vkDestroyInstance(instance, nullptr);
@@ -180,13 +184,13 @@ Window::~Window() {
 }
 
 ImDrawData* Window::Present(n64::Core& core) {
-  //ImGui_ImplVulkan_NewFrame();
-  //ImGui_ImplSDL2_NewFrame(window);
-  //ImGui::NewFrame();
+  ImGui_ImplVulkan_NewFrame();
+  ImGui_ImplSDL2_NewFrame(window);
+  ImGui::NewFrame();
 //
   Render(core);
 
-  //ImGui::Render();
+  ImGui::Render();
   return ImGui::GetDrawData();
 }
 

src/frontend/imgui/Window.hpp

@@ -19,7 +19,6 @@ private:
   void InitImgui();
   void Render(n64::Core& core);
 
-  VkInstance instance{};
   VkPhysicalDevice physicalDevice{};
   VkDevice device{};
   uint32_t queueFamily{uint32_t(-1)};