public void End()
{
ImGuiIOPtr io = ImGui.GetIO();
Application app = Application.Instance;
io.DisplaySize = new Vector2((float)app.Window.Width, (float)app.Window.Height);
// Rendering
ImGui.Render();
ImGuiController.ImGui_ImplOpenGL3_RenderDrawData(ImGui.GetDrawData());
if ((io.ConfigFlags & ImGuiConfigFlags.ViewportsEnable) > 0)
{
GLFW.Window backup_current_context = GLFW.Glfw.CurrentContext;
ImGui.UpdatePlatformWindows();
ImGui.RenderPlatformWindowsDefault();
GLFW.Glfw.MakeContextCurrent(backup_current_context);
}
}