From 5de8190e37f2560de38776063b1cc946eea95656 Mon Sep 17 00:00:00 2001
From: BlackMATov <blackmatov@gmail.com>
Date: Tue, 22 Oct 2019 02:59:52 +0700
Subject: [PATCH] add new frame_finalize stage to game loop

---
 headers/enduro2d/core/engine.hpp           |  1 +
 headers/enduro2d/high/systems/_systems.hpp |  2 ++
 sources/enduro2d/core/engine.cpp           |  4 ++++
 sources/enduro2d/high/starter.cpp          | 13 ++++++++++---
 4 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/headers/enduro2d/core/engine.hpp b/headers/enduro2d/core/engine.hpp
index d2f695e7..dcc070db 100644
--- a/headers/enduro2d/core/engine.hpp
+++ b/headers/enduro2d/core/engine.hpp
@@ -53,6 +53,7 @@ namespace e2d
         virtual void shutdown() noexcept;
         virtual bool frame_tick();
         virtual void frame_render();
+        virtual void frame_finalize();
     };
 
     //
diff --git a/headers/enduro2d/high/systems/_systems.hpp b/headers/enduro2d/high/systems/_systems.hpp
index 4be97855..bb4966bd 100644
--- a/headers/enduro2d/high/systems/_systems.hpp
+++ b/headers/enduro2d/high/systems/_systems.hpp
@@ -29,6 +29,8 @@ namespace e2d::systems
     struct pre_render_event {};
     struct post_render_event {};
 
+    struct frame_finalize_event {};
+
     using update_system = ecs::system<update_event>;
     using post_update_system = ecs::system<post_update_event>;
 
diff --git a/sources/enduro2d/core/engine.cpp b/sources/enduro2d/core/engine.cpp
index 97caef25..9efef894 100644
--- a/sources/enduro2d/core/engine.cpp
+++ b/sources/enduro2d/core/engine.cpp
@@ -60,6 +60,9 @@ namespace e2d
     void engine::application::frame_render() {
     }
 
+    void engine::application::frame_finalize() {
+    }
+
     //
     // engine::debug_parameters
     //
@@ -501,6 +504,7 @@ namespace e2d
                     the<window>().swap_buffers();
                 }
 
+                app->frame_finalize();
                 state_->calculate_end_frame_timers();
             } catch ( ... ) {
                 app->shutdown();
diff --git a/sources/enduro2d/high/starter.cpp b/sources/enduro2d/high/starter.cpp
index 9347c2b9..31b70f2f 100644
--- a/sources/enduro2d/high/starter.cpp
+++ b/sources/enduro2d/high/starter.cpp
@@ -51,10 +51,10 @@ namespace
                     .add_system<flipbook_system>())
                 .feature<struct label_feature>(ecs::feature()
                     .add_system<label_system>())
-                .feature<struct spine_feature>(ecs::feature()
-                    .add_system<spine_system>())
                 .feature<struct render_feature>(ecs::feature()
-                    .add_system<render_system>());
+                    .add_system<render_system>())
+                .feature<struct spine_feature>(ecs::feature()
+                    .add_system<spine_system>());
             return !application_ || application_->initialize();
         }
 
@@ -84,6 +84,13 @@ namespace
             registry.process_event(systems::render_event{});
             registry.process_event(systems::post_render_event{});
         }
+
+        void frame_finalize() final {
+            world& w = the<world>();
+            ecs::registry& registry = w.registry();
+            registry.process_event(systems::frame_finalize_event{});
+            w.finalize_instances();
+        }
     private:
         starter::application_uptr application_;
     };