FFS - Change Fullscreen

class << Graphics
public
  def fullscreen_mode
    return if vx_fullscreen?
    initialize_fullscreen_rects
    show_back
    hide_borders
    @fullscreen = true
    self.ratio += 0 # refresh window size
  end
  def toggle_fullscreen
    if fullscreen?
      windowed_mode
    else
      fullscreen_mode
      Window_Resize.f
    end
  end
  def update
    toggle_fullscreen if Input.alt_enter_trigger?
    toggle_fullscreen if Input.trigger?(Input::F5)
    toggle_ratio      if Input.trigger?(Input::F6)
    zeus_fullscreen_update
  end
  def ratio=(r)
    return if vx_fullscreen?
    initialize_fullscreen_rects
    r = 0 if r < 0
    if @fullscreen
      @fullscreen_ratio = r
      w_max, h_max = @fullscreen_rect.width, @fullscreen_rect.height
    else
      @windowed_ratio = r
      w_max = @workarea_rect.width  - @borders_size.width
      h_max = @workarea_rect.height - @borders_size.height
    end
    if r == 0
      w, h = w_max, w_max * height / width
      h, w = h_max, h_max * width / height if h > h_max
    else
      w, h = width * r, height * r
      return self.ratio = 0 if w > w_max or h > h_max
    end
    index = Mewgles_SystemOptionsEdit::resolution_index
    w = Mewgles_SystemOptionsEdit::RESOLUTIONS[index][1]
    h = Mewgles_SystemOptionsEdit::RESOLUTIONS[index][2]
    resize_window(w, h)
    save_fullscreen_settings
  end
end

module Input
  VK_LALT = 0xA4
  VK_RETURN = 0x0D

  GetAsyncKeyState = Win32API.new('user32', 'GetAsyncKeyState', 'i', 'i')

  def self.alt_enter_trigger?
    (GetAsyncKeyState.call(VK_LALT) & 0x8001) != 0 && (GetAsyncKeyState.call(VK_RETURN) & 0x0001) != 0
  end

  def self.alt_trigger?
    (GetAsyncKeyState.call(VK_LALT) & 0x8001) != 0
  end

  def self.enter_trigger?
    (GetAsyncKeyState.call(VK_RETURN) & 0x0001) != 0
  end
end