Route render capture hooks through platform services

src/platform_windows/windows_platform_services.cpp

@@ -13,6 +13,8 @@ void destroy_window();
 void async_lock();
 void async_unlock();
 void win32_async_swap();
+void win32_renderdoc_frame_start();
+void win32_renderdoc_frame_end();
 void win32_update_fps(int frames);
 void win32_update_stylus(float dt);
 
@@ -201,6 +203,16 @@ public:
         win32_async_swap();
     }
 
+    void begin_render_capture_frame() override
+    {
+        win32_renderdoc_frame_start();
+    }
+
+    void end_render_capture_frame() override
+    {
+        win32_renderdoc_frame_end();
+    }
+
     void update_platform_frame(float delta_time_seconds) override
     {
         win32_update_stylus(delta_time_seconds);