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/Renderer/Swapchain.hpp

@@ -12,16 +12,17 @@
 #include <Nazara/Renderer/Config.hpp>
 #include <Nazara/Renderer/RenderFrame.hpp>
 #include <Nazara/Renderer/RenderPass.hpp>
-#include <Nazara/Renderer/RenderTarget.hpp>
+#include <NazaraUtils/Signal.hpp>
 #include <vector>
 
 namespace Nz
 {
 	class CommandPool;
+	class Framebuffer;
 	class RenderDevice;
 	class TransientResources;
 
-	class NAZARA_RENDERER_API Swapchain : public RenderTarget
+	class NAZARA_RENDERER_API Swapchain
 	{
 		public:
 			Swapchain() = default;
@@ -29,14 +30,13 @@ namespace Nz
 
 			virtual RenderFrame AcquireFrame() = 0;
 
-			void BlitTexture(RenderFrame& renderFrame, CommandBufferBuilder& builder, const Texture& texture) const override;
-
 			virtual std::shared_ptr<CommandPool> CreateCommandPool(QueueType queueType) = 0;
 
 			virtual const Framebuffer& GetFramebuffer(std::size_t i) const = 0;
 			virtual std::size_t GetFramebufferCount() const = 0;
 			virtual PresentMode GetPresentMode() const = 0;
 			virtual const RenderPass& GetRenderPass() const = 0;
+			virtual const Vector2ui& GetSize() const = 0;
 			virtual PresentModeFlags GetSupportedPresentModes() const = 0;
 
 			virtual void NotifyResize(const Vector2ui& newSize) = 0;
@@ -45,6 +45,8 @@ namespace Nz
 
 			virtual TransientResources& Transient() = 0;
 
+			NazaraSignal(OnSwapchainResize, Swapchain* /*swapchain*/, const Vector2ui& /*newSize*/);
+
 		protected:
 			static void BuildRenderPass(PixelFormat colorFormat, PixelFormat depthFormat, std::vector<RenderPass::Attachment>& attachments, std::vector<RenderPass::SubpassDescription>& subpassDescriptions, std::vector<RenderPass::SubpassDependency>& subpassDependencies);
 	};