centralize header with grid_renderer base type

include/mapnik/grid/grid_renderer_base.hpp

@@ -0,0 +1,36 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2012 Artem Pavlenko
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *****************************************************************************/
+
+#ifndef MAPNIK_GRID_RENDERER_BASE_HPP
+#define MAPNIK_GRID_RENDERER_BASE_HPP
+
+#include "agg_renderer_base.h"
+#include <mapnik/grid/grid_pixfmt.hpp>
+#include <mapnik/grid/grid_pixel.hpp>
+
+namespace mapnik {
+
+typedef agg::renderer_base<mapnik::pixfmt_gray64> grid_renderer_base_type;
+
+}
+
+#endif //MAPNIK_AGG_RASTERIZER_HPP