Document VR ownership and GLFW platform hooks

src/main.cpp

@@ -30,6 +30,7 @@
 #include <iomanip>
 #include <ctime>
 #include <sstream>
+#include <memory>
 #include <stop_token>
 
 #define WM_USER_CLOSE (WM_USER + 1)
@@ -519,18 +520,17 @@ void init_vk_map()
 
 std::mutex hmd_render_mutex;
 std::condition_variable hmd_render_cv;
-Vive* vive = nullptr;
+std::unique_ptr<Vive> vive;
 bool win32_vr_start()
 {
     if (sandboxed)
         return false;
 
-    vive = new Vive;
+    vive = std::make_unique<Vive>();
     vive->on_draw = [](const glm::mat4& proj, const glm::mat4& view, const glm::mat4& pose) { App::I->vr_draw(proj, view, pose); };
     if (!vive->Initialize())
     {
-        delete vive;
-        vive = nullptr;
+        vive.reset();
         LOG("VR: failed to initialize vive");
         return false;
     }
@@ -615,8 +615,7 @@ void win32_vr_stop()
             hmd_renderer.join();
         }
         vive->Terminate();
-        delete vive;
-        vive = nullptr;
+        vive.reset();
     }
 }