void ClearTextSurface()
{
if (_townsScreen != null)
_townsScreen.FillLayerRect(1, new Point(), _textSurface.Width, _textSurface.Height, 0);
Gdi.Fill(_textSurface.Pixels, _textSurface.Pitch, (byte)(Game.Platform == Platform.FMTowns ? 0 : CharsetMaskTransparency), _textSurface.Width, _textSurface.Height);
}