Arc not working on Windows about libui HOT 2 CLOSED

require 'libui'

UI = LibUI

UI.init

handler = UI::FFI::AreaHandler.malloc
handler.to_ptr.free = Fiddle::RUBY_FREE
area    = UI.new_area(handler)
brush   = UI::FFI::DrawBrush.malloc
brush.to_ptr.free = Fiddle::RUBY_FREE

handler_draw_event = Fiddle::Closure::BlockCaller.new(0, [1, 1, 1]) do |_, _, area_draw_params|
  area_draw_params = UI::FFI::AreaDrawParams.new(area_draw_params)
  100.times do |i|
    path = UI.draw_new_path(0)
    UI.draw_path_new_figure(path, 200, 200 - i) # Here
    UI.draw_path_arc_to(path, 200, 200 - i, 100 - i, Math::PI / 6, Math::PI / 4, 1)
    UI.draw_path_end(path)
    brush.Type = 0
    brush.R = rand(10) / 10.0
    brush.G = rand(10) / 10.0
    brush.B = rand(10) / 10.0
    brush.A = rand(10) / 10.0
    UI.draw_fill(area_draw_params.Context, path, brush.to_ptr)
    UI.draw_free_path(path)
  end
end

handler.Draw         = handler_draw_event
# 
do_nothing           = Fiddle::Closure::BlockCaller.new(0, [0]) {}
handler.MouseEvent   = do_nothing
handler.MouseCrossed = do_nothing
handler.DragBroken   = do_nothing
handler.KeyEvent     = do_nothing

box = UI.new_vertical_box
UI.box_set_padded(box, 1)
UI.box_append(box, area, 1)

main_window = UI.new_window('Basic Area', 400, 400, 1)
UI.window_set_margined(main_window, 1)
UI.window_set_child(main_window, box)

UI.window_on_closing(main_window) do
  UI.control_destroy(main_window)
  UI.quit
  0
end
UI.control_show(main_window)

UI.main
UI.quit