From c47f54992fa237259d07ead44097ad24128b1090 Mon Sep 17 00:00:00 2001
From: redstrate <54911369+redstrate@users.noreply.github.com>
Date: Sun, 18 Apr 2021 21:38:57 -0400
Subject: [PATCH] Add flag for apps like an editor who doesn't render any scene
 in the main window.

---
 engine/core/include/app.hpp           | 2 ++
 engine/core/src/engine.cpp            | 2 +-
 tools/common/include/commoneditor.hpp | 2 ++
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/engine/core/include/app.hpp b/engine/core/include/app.hpp
index 670dc1a..9e78a26 100755
--- a/engine/core/include/app.hpp
+++ b/engine/core/include/app.hpp
@@ -26,6 +26,8 @@ public:
     virtual void update([[maybe_unused]] const float delta_time) {}
 
     virtual void render([[maybe_unused]] GFXCommandBuffer* command_buffer) {}
+
+    virtual bool wants_no_scene_rendering() { return false; }
 };
 
 /// This is an app's equivalent main(). You can check command line arguments through Engine::comand_line_arguments.
diff --git a/engine/core/src/engine.cpp b/engine/core/src/engine.cpp
index c4a46bf..457f87e 100755
--- a/engine/core/src/engine.cpp
+++ b/engine/core/src/engine.cpp
@@ -769,7 +769,7 @@ void Engine::render(const int index) {
     }
 
     if(_renderer != nullptr)
-        _renderer->render(commandbuffer, _current_scene, *window->render_target, index);
+        _renderer->render(commandbuffer, _app->wants_no_scene_rendering() ? nullptr : _current_scene, *window->render_target, index);
 
     _gfx->submit(commandbuffer, index);
 }
diff --git a/tools/common/include/commoneditor.hpp b/tools/common/include/commoneditor.hpp
index 3f2dbcb..5365653 100755
--- a/tools/common/include/commoneditor.hpp
+++ b/tools/common/include/commoneditor.hpp
@@ -128,6 +128,8 @@ public:
     virtual void object_selected([[maybe_unused]] Object object) {}
     virtual void asset_selected([[maybe_unused]] std::filesystem::path path, [[maybe_unused]] AssetType type) {}
 
+    bool wants_no_scene_rendering() override { return true; }
+
     void createDockArea();
     void drawViewport(Scene* scene);
     void drawAssets();