=begin
  ■ Viewport変更 ver 0.0.0.1
                             by 半生
  http://www.tktkgame.com
  http://www11.atpages.jp/namahanka/

 ■ 概要
   XPでも Sprite・WindowクラスのViewportを生成後に変更できるようにします。

ver 0.0.0.1（2010/09/25）
　公開
=end
class Sprite
  # Viewport を設定
  def viewport=(new_vp)
    # nil でも Viewport でもない場合は何もしない。
    return new_vp unless new_vp.is_a?(Viewport) or new_vp.nil?
    # viewportが変わってなければ何もしない
    if self.viewport.object_id == new_vp.object_id
      return new_vp
    end
    # 本処理
    # 必要パラメータを退避
    _bitmap = self.bitmap
    _src_rect = self.src_rect
    _visible = self.visible
    _x = self.x
    _y = self.y
    _z = self.z
    _ox = self.ox
    _oy = self.oy
    _zoom_x = self.zoom_x
    _zoom_y = self.zoom_y
    _angle = self.angle
    _mirror = self.mirror
    _bush_depth = self.bush_depth
    _opacity = self.opacity
    _blend_type = self.blend_type
    _color = self.color
    _tone = self.tone
    # 初期化
    self.bitmap = nil
    Sprite.instance_method(:dispose).bind(self).call()
    Sprite.instance_method(:initialize).bind(self).call(new_vp)

    # 退避していたものを復帰
    self.bitmap = _bitmap
    self.src_rect = _src_rect
    self.visible = _visible
    self.x = _x
    self.y = _y
    self.z = _z
    self.ox = _ox
    self.oy = _oy
    self.zoom_x = _zoom_x
    self.zoom_y = _zoom_y
    self.angle = _angle
    self.mirror = _mirror
    self.bush_depth = _bush_depth
    self.opacity = _opacity
    self.blend_type = _blend_type
    self.color = _color
    self.tone = _tone
  end
end

class Window
  # Viewport を設定
  def viewport=(new_vp)
    # nil でも Viewport でもない場合は何もしない。
    return new_vp unless new_vp.is_a?(Viewport) or new_vp.nil?
    # viewportが変わってなければ何もしない
    if self.viewport.object_id == new_vp.object_id
      return new_vp
    end
    # 本処理
    # 必要パラメータを退避
    _windowskin = self.windowskin
    _contents = self.contents.dup
    _stretch = self.stretch
    _cursor_rect = self.cursor_rect
    _active = self.active
    _visible = self.visible
    _pause = self.pause
    _x = self.x
    _y = self.y
    _width = self.width
    _height = self.height
    _z = self.z
    _ox = self.ox
    _oy = self.oy
    _opacity = self.opacity
    _back_opacity = self.back_opacity
    _contents_opacity = self.contents_opacity

    # 初期化
    self.windowskin = nil
    Window.instance_method(:dispose).bind(self).call()
    Window.instance_method(:initialize).bind(self).call(new_vp)
    self.contents.dispose

    # 退避していたものを復帰
    self.windowskin = _windowskin
    self.contents = _contents
    self.stretch = _stretch
    self.cursor_rect = _cursor_rect
    self.active = _active
    self.visible = _visible
    self.pause = _pause
    self.x = _x
    self.y = _y
    self.width = _width
    self.height = _height
    self.z = _z
    self.ox = _ox
    self.oy = _oy
    self.opacity = _opacity
    self.back_opacity = _back_opacity
    self.contents_opacity = _contents_opacity
  end
end