Fix issues with de/re-initialisation

openVulkanoCpp/AR/Provider/Playback/ArFramePlayback.cpp

@@ -30,6 +30,7 @@ namespace openVulkanoCpp::AR::Playback
 		colorImage.intrinsic = frameMetadata.intrinsic.GetForResolution({ colorImgData.cols, colorImgData.rows });
 		colorImage.format = ArImagePlanar::Format::RGB;
 		colorImage.luminescenceOrColor = { colorImgData.data, { colorImgData.cols, colorImgData.rows }};
+		SetSaved();
 	}
 
 	ArImagePlanar ArFramePlayback::GetCameraImage()

openVulkanoCpp/Host/GraphicsAppManager.cpp

@@ -142,7 +142,7 @@ namespace openVulkanoCpp
 		renderer->Close();
 		window->Close();
 		app->Close();
-		platform->Close();
+		if (platform) platform->Close();
 		windowTitleFormat = "";
 		Logger::MANAGER->info("Shutdown complete");
 	}

openVulkanoCpp/Host/ImGuiImplOpenVulkano.cpp

@@ -60,8 +60,10 @@ namespace openVulkanoCpp
 	{
 		ImGuiIO& io = ImGui::GetIO();
 
+#ifndef __APPLE__
 		ImGui::DestroyPlatformWindows();
-
+#endif
+		
 		io.BackendPlatformName = nullptr;
 		io.BackendPlatformUserData = nullptr;
 		io.BackendFlags = ImGuiBackendFlags_None;

openVulkanoCpp/Scene/Drawable.cpp

@@ -35,7 +35,7 @@ namespace openVulkanoCpp::Scene
 	void Drawable::RemoveNode(Node* node)
 	{
 		Utils::Remove(m_nodes, node);
-		if (m_nodes.empty())
+		if (m_nodes.empty() && m_scene)
 		{
 			m_scene->RemoveDrawable(this);
 			m_scene = nullptr;

openVulkanoCpp/Vulkan/Renderer.cpp

@@ -84,6 +84,7 @@ namespace openVulkanoCpp::Vulkan
 
 	void Renderer::Resize(const uint32_t newWidth, const uint32_t newHeight)
 	{
+		if (!context.device) return;
 		context.Resize(newWidth, newHeight);
 		resourceManager.Resize();
 	}