Added UI component, resource & system. Now renders on screen and live reloads

Nuake/src/Resource/UI.cpp

@@ -0,0 +1,72 @@
+#include "UI.h"
+#include "Engine.h"
+#include "src/FileSystem/FileSystem.h"
+#include "src/Rendering/Buffers/Framebuffer.h"
+#include "src/UI/NuakeUI.h"
+#include "src/UI/Parsers/CanvasParser.h"
+#include "src/UI/UIInputManager.h"
+
+
+using namespace Nuake;
+using namespace NuakeUI;
+
+MyInputManager* UIResource::inputManager = nullptr;
+
+UIResource::UIResource(const std::string& path) :
+	filePath(path)
+{
+	const Vector2 defaultSize = { 1280, 720 };
+	framebuffer = CreateRef<FrameBuffer>(true, defaultSize);
+	framebuffer->SetTexture(CreateRef<Texture>(defaultSize, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE));
+
+	if (!inputManager)
+	{
+		inputManager = new MyInputManager(*Engine::GetCurrentWindow());
+	}
+
+	CanvasParser parser;
+	canvas = parser.Parse(FileSystem::RelativeToAbsolute(path));
+	canvas->SetInputManager(inputManager);
+	canvas->ComputeLayout(defaultSize);
+}
+
+void UIResource::Draw()
+{
+	framebuffer->Bind();
+	{
+		RenderCommand::Clear();
+
+		if (canvas)
+		{
+			canvas->Draw();
+		}
+	}
+	framebuffer->Unbind();
+}
+
+void UIResource::Resize(const Vector2& size)
+{
+	framebuffer->QueueResize(size);
+	canvas->ComputeLayout(size);
+}
+
+void UIResource::Reload()
+{
+	if (!FileSystem::FileExists(filePath))
+	{
+		return;
+	}
+
+	CanvasParser parser;
+	canvas = parser.Parse(FileSystem::RelativeToAbsolute(filePath));
+	if (canvas)
+	{
+		canvas->SetInputManager(inputManager);
+		canvas->ComputeLayout(framebuffer->GetSize());
+	}
+}
+
+Ref<Texture> UIResource::GetOutputTexture() const
+{
+	return framebuffer->GetTexture();
+}