implemented new layer function imguirender

SakuraCore/src/Application.cpp

@@ -6,7 +6,6 @@
 #include "SDL3/SDL_render.h"
 #include "imgui.h"
 #include "imgui_impl_sdl3.h"
-#include "imgui_impl_sdlrenderer3.h"
 
 #define SDL_MAIN_HANDLED 1
 
@@ -82,10 +81,13 @@ void Application::Run() {
 
         float time = 0;
 
+        // Update functions before rendereing
         for (auto layer : m_LayerStack) {
             layer->OnFrame(time);
         }
 
+        // Events
+        // can i connect my events to sdl events and use their dispatcher?
         SDL_Event event;
 
         while (SDL_PollEvent(&event)) {
@@ -108,11 +110,21 @@ void Application::Run() {
         }
         //
         // Rendering
-        ImGui::Render();
+
+        m_ImGuiLayer->Begin();
+
         SDL_SetRenderScale(m_Renderer, io.DisplayFramebufferScale.x, io.DisplayFramebufferScale.y);
-        SDL_SetRenderDrawColor(m_Renderer, (Uint8)255, (Uint8)255, (Uint8)255, (Uint8)255);
+        SDL_SetRenderDrawColor(m_Renderer, (Uint8)111, (Uint8)232, (Uint8)168, (Uint8)0);
         SDL_RenderClear(m_Renderer);
-        ImGui_ImplSDLRenderer3_RenderDrawData(ImGui::GetDrawData(), m_Renderer);
+        // the above 3 lines go before implsdl3 render
+        // or not?
+
+        for (auto layer : m_LayerStack) {
+            layer->OnImGuiRender();
+        }
+
+        m_ImGuiLayer->End();
+
         SDL_RenderPresent(m_Renderer);
     }
 }

SakuraCore/src/Layer.h

@@ -8,12 +8,11 @@ public:
     Layer(const std::string &name = "Layer");
     virtual ~Layer() = default;
 
-    virtual void OnStart() {}
     virtual void OnFrame(float timestamp) {}
-    virtual void OnEnd() {}
     virtual void OnEvent() {}
     virtual void OnAttach() {}
     virtual void OnDetach() {}
+    virtual void OnImGuiRender() {}
 
     const std::string &GetName() const { return m_LayerName; }
 

SakuraCore/src/imguilayer.cpp

@@ -42,5 +42,22 @@ void ImGuiLayer::End() {
 
     Application &app = Application::Get();
     io.DisplaySize = ImVec2((float)app.GetWindowData().width, (float)app.GetWindowData().height);
+
+    ImGui::Render();
+    ImGui_ImplSDLRenderer3_RenderDrawData(ImGui::GetDrawData(), Application::Get().GetSDLRenderer());
+    ImGui::EndFrame();
+}
+
+void ImGuiLayer::OnImGuiRender() {
+    ImGuiIO &io = ImGui::GetIO();
+    bool demoWindow = true;
+    ImGui::Begin("Test window");
+    ImGui::ShowDemoWindow(&demoWindow);
+    ImGui::Text("Application avg %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
+
+    if (ImGui::Button("Quit")) {
+        Application::Get().SetRunningState(false);
+    }
+    ImGui::End();
 }
 } // namespace SakuraVNE

SakuraCore/src/imguilayer.h

@@ -8,11 +8,10 @@ public:
     ImGuiLayer();
     ~ImGuiLayer() = default;
 
-    // virtual void OnStart() override;
     // virtual void OnFrame(float timestamp) override;
-    // virtual void OnEnd() override;
     virtual void OnAttach() override;
     virtual void OnDetach() override;
+    virtual void OnImGuiRender() override;
     // virtual void OnEvent() override;
 
     void Begin();