main: minor refactor

1 files changed, 44 insertions, 29 deletions

diff --git a/src/main.cpp b/src/main.cpp
index bdd5a18..16dce53 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -18,7 +18,7 @@
 
 
 Game::GameType
-do_menu()
+DrawGameMenu()
 {
     Game::GameType type = Game::NO_GAME;
 
@@ -47,14 +47,28 @@ do_menu()
 }
 
 
-int
-main(int argc, char **argv)
+void
+DrawPerformanceInfo()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    ImGuiWindowFlags flags = ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove;
+
+    ImGui::SetNextWindowPos(ImVec2(io.DisplaySize.x - 200, 0));
+    ImGui::Begin("Performance", nullptr, flags);
+    ImGui::Text("%.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
+    ImGui::End();
+}
+
+
+SDL_Window*
+CreateWindow()
 {
     if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD)) {
         std::cerr << "Failed to init SDL3: " << SDL_GetError() << '\n';
-        return EXIT_FAILURE;
+        return nullptr;
     }
 
+
     const char* glsl_version = "#version 130";
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
@@ -65,25 +79,31 @@ main(int argc, char **argv)
     SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
 
+
     SDL_Window *window = SDL_CreateWindow("fsarcade", 1024, 768, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN | SDL_WINDOW_HIGH_PIXEL_DENSITY);
     if (!window) {
         std::cerr << "Failed to create SDL_window: " << SDL_GetError() << '\n';
-        return EXIT_FAILURE;
+        return nullptr;
     }
 
     SDL_GLContext sdl_gl_context = SDL_GL_CreateContext(window);
     if (!sdl_gl_context) {
         std::cerr << "Failed to create SDL_GLContext: " << SDL_GetError() << '\n';
         SDL_DestroyWindow(window);
-        return EXIT_FAILURE;
+        return nullptr;
     }
 
+
     GLenum glew_error = glewInit();
     if (glew_error != GLEW_OK)
     {
-        fprintf(stderr, "Error: %s\n", glewGetErrorString(glew_error));
+        SDL_GL_DestroyContext(sdl_gl_context);
+        SDL_DestroyWindow(window);
+        std::cerr << "Failed to init glew: " << glewGetErrorString(glew_error) << '\n';
+        return nullptr;
     }
 
+
     SDL_GL_MakeCurrent(window, sdl_gl_context);
     SDL_GL_SetSwapInterval(1); // enable vsync
     SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
@@ -102,16 +122,27 @@ main(int argc, char **argv)
     ImGui_ImplSDL3_InitForOpenGL(window, sdl_gl_context);
     ImGui_ImplOpenGL3_Init(glsl_version);
 
+    return window;
+}
+
 
-    g_renderer.Init(window);
+int
+main(int argc, char **argv)
+{
+    SDL_Window* window = CreateWindow();
+    if (!window) {
+        return 0;
+    }
 
 
+    g_renderer.Init(window);
     std::unique_ptr<Game> game = nullptr;
 
 
     std::vector<SDL_Event> game_events;
     game_events.reserve(32);
 
+
     for (;;) {
         ImGui_ImplOpenGL3_NewFrame();
         ImGui_ImplSDL3_NewFrame();
@@ -132,11 +163,11 @@ main(int argc, char **argv)
             ImGui_ImplSDL3_ProcessEvent(&event);
 
             if (event.type == SDL_EVENT_QUIT)
-                goto QUIT;
+                return 0;
             if (event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED && event.window.windowID == SDL_GetWindowID(window))
-                goto QUIT;
+                return 0;
             if (event.type == SDL_EVENT_WINDOW_DESTROYED && event.window.windowID == SDL_GetWindowID(window)) {
-                goto QUIT;
+                return 0;
             }
         }
 
@@ -153,7 +184,7 @@ main(int argc, char **argv)
             }
         }
         else {
-            Game::GameType type = do_menu();
+            Game::GameType type = DrawGameMenu();
             if (type != Game::NO_GAME) {
                 game = Game::Select(type);
             }
@@ -161,30 +192,14 @@ main(int argc, char **argv)
         game_events.clear();
 
 
-
-        ImGuiWindowFlags flags = ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove;
-
-        ImGui::SetNextWindowPos(ImVec2(io.DisplaySize.x - 200, 0));
-        ImGui::Begin("Performance", nullptr, flags);
-        ImGui::Text("%.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
-        ImGui::End();
-
-
         g_renderer.Draw();
         ImGui::Render();
         ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
         SDL_GL_SwapWindow(window);
         g_renderer.Reset();
     }
 
-QUIT:
-    ImGui_ImplOpenGL3_Shutdown();
-    ImGui_ImplSDL3_Shutdown();
-    ImGui::DestroyContext();
-
-    SDL_GL_DestroyContext(sdl_gl_context);
-    SDL_DestroyWindow(window);
-    SDL_Quit();
     return 0;
 }