New Render queues (#161)

* Add new render queues proof of concept + scissoring support (WIP)

* Graphics: Adapt basic sprites rendering to new render queue system

* Graphics: Fix layers when rendering sprites

* Graphics/RenderQueue: Fix sprite default overlay

* Graphics: Enable scissor test by default

* SDK/Widgets: Enable scissoring on widgets

* Graphics: Handle almost everything with the new renderqueues system

Todo:
- Billboard rendering
- Proper model rendering

* Graphics/RenderQueue: Billboard drawing now works (WIP)

At 1/4 of previous code performances due to individually process of billboards

* Add new render queues proof of concept + scissoring support (WIP)

* Graphics: Adapt basic sprites rendering to new render queue system

* Graphics: Fix layers when rendering sprites

* Graphics/RenderQueue: Fix sprite default overlay

* Graphics: Enable scissor test by default

* SDK/Widgets: Enable scissoring on widgets

* Graphics: Handle almost everything with the new renderqueues system

Todo:
- Billboard rendering
- Proper model rendering

* Graphics/RenderQueue: Billboard drawing now works (WIP)

At 1/4 of previous code performances due to individually process of billboards

* Graphics/RenderQueues: Add full support for billboards

* Graphics/RenderQueue: Cleanup and improve billboard rendering

* Graphics/RenderQueue: Fix model drawing

* Examples/Particles: Fix lighting on space station

* Graphics: Cleanup forward render queue/technique

* Fix compilation under Linux

* Graphics/ForwardRenderTechnique: Fix case when scissoring is enabled on material but disabled on element

* Add support for Deferred Shading

* SDK/Widgets: Fix widget rendering

* Graphics: Remove legacy code from render queues

* Graphics: Fix some objects sometimes not showing up due to broken scissor box

* Fix compilation error

* Sdk/GraphicsGraphics: Fix bounding volume

* SDK/World: Fix self-assignation

* Update changelog for render queues

SDK/include/NDK/BaseWidget.hpp

@@ -83,9 +83,10 @@ namespace Ndk
 			};
 
 		protected:
-			const EntityHandle& CreateEntity();
+			const EntityHandle& CreateEntity(bool isContentEntity);
 			void DestroyEntity(Entity* entity);
 			virtual void Layout();
+
 			void InvalidateNode() override;
 
 			virtual bool IsFocusable() const;
@@ -111,11 +112,18 @@ namespace Ndk
 			void RegisterToCanvas();
 			inline void UpdateCanvasIndex(std::size_t index);
 			void UnregisterFromCanvas();
+			void UpdatePositionAndSize();
+
+			struct WidgetEntity
+			{
+				EntityOwner handle;
+				bool isContent;
+			};
 
 			static constexpr std::size_t InvalidCanvasIndex = std::numeric_limits<std::size_t>::max();
 
 			std::size_t m_canvasIndex;
-			std::vector<EntityOwner> m_entities;
+			std::vector<WidgetEntity> m_entities;
 			std::vector<std::unique_ptr<BaseWidget>> m_children;
 			Canvas* m_canvas;
 			EntityOwner m_backgroundEntity;