Examples: SDL2 (all), SDL3 (all), Win32+OpenGL3: Rework examples main loop to handle minimization without burning CPU or GPU by running unthrottled code. (#7844)

examples/example_sdl2_opengl3/main.cpp

@@ -140,6 +140,11 @@ int main(int, char**)
             if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
                 done = true;
         }
+        if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)
+        {
+            SDL_Delay(10);
+            continue;
+        }
 
         // Start the Dear ImGui frame
         ImGui_ImplOpenGL3_NewFrame();