class GfxClippingArea : public Backup<DrawPixelInfo>
{
public:
  GfxClippingArea(const char * const file, const int line) : Backup<DrawPixelInfo>(_cur_dpi, file, line) {}

  bool Clip(int left, int top, int width, int height)
  {
    if (!FillDrawPixelInfo(&this->new_dpi, left, top, width, height)) return false;
    this->Change(&this->new_dpi);
    return true;
  }

private:
  DrawPixelInfo new_dpi;
};