Graphics: Rework RenderTargets

- RenderTarget have been moved to the Graphics module and are now lightweight objects between the target of rendering (swapchain or texture)
- RenderTexture no longer require a blit between the framegraph texture and the target texture (the target texture is now directly rendered onto using a new feature of the framegraph)
- ForwardFramePipeline viewers are now properly ordered by render order

include/Nazara/Graphics/RenderWindow.hpp

@@ -0,0 +1,50 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_GRAPHICS_RENDERWINDOW_HPP
+#define NAZARA_GRAPHICS_RENDERWINDOW_HPP
+
+#include <NazaraUtils/Prerequisites.hpp>
+#include <Nazara/Graphics/Config.hpp>
+#include <Nazara/Graphics/RenderTarget.hpp>
+#include <Nazara/Renderer/WindowSwapchain.hpp>
+
+namespace Nz
+{
+	class FrameGraph;
+
+	class NAZARA_GRAPHICS_API RenderWindow : public RenderTarget
+	{
+		public:
+			inline RenderWindow(Swapchain& swapchain);
+			RenderWindow(WindowSwapchain& windowSwapchain);
+			RenderWindow(const RenderWindow&) = delete;
+			RenderWindow(RenderWindow&&) = delete;
+			~RenderWindow() = default;
+
+			void OnBuildGraph(FrameGraph& graph, std::size_t attachmentIndex) const override;
+			void OnRenderEnd(RenderFrame& renderFrame, const BakedFrameGraph& frameGraph, std::size_t attachmentId) const override;
+
+			const Vector2ui& GetSize() const override;
+
+			RenderWindow& operator=(const RenderWindow&) = delete;
+			RenderWindow& operator=(RenderWindow&&) = delete;
+
+		private:
+			void SetSwapchain(Swapchain* swapchain);
+
+			NazaraSlot(Swapchain, OnSwapchainResize, m_onSwapchainResize);
+			NazaraSlot(WindowSwapchain, OnSwapchainCreated, m_onSwapchainCreated);
+			NazaraSlot(WindowSwapchain, OnSwapchainDestroy, m_onSwapchainDestroy);
+
+			Swapchain* m_swapchain;
+			WindowSwapchain* m_windowSwapchain;
+	};
+}
+
+#include <Nazara/Graphics/RenderWindow.inl>
+
+#endif // NAZARA_GRAPHICS_RENDERWINDOW_HPP