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diff --git a/graphics/epix/tile.h b/graphics/epix/tile.h
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+/* 
+ * tile.h -- ePiX::screen object base class (tile)
+ *
+ * This file is part of ePiX, a C++ library for creating high-quality 
+ * figures in LaTeX 
+ *
+ * Version 1.0.23
+ * Last Change: January 14, 2007
+ *
+ * 
+ * Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ * Andrew D. Hwang <rot 13 nujnat at zngupf dot ubylpebff dot rqh>
+ * Department of Mathematics and Computer Science
+ * College of the Holy Cross
+ * Worcester, MA, 01610-2395, USA
+ *
+ *
+ * ePiX is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * ePiX 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 General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ePiX; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef EPIX_TILE
+#define EPIX_TILE
+
+#include <string>
+
+namespace ePiX {
+
+  class format;
+  class length;
+  class affine;
+  class screen;
+  class screen_mask;
+
+  class tile {
+  public:
+    virtual ~tile();
+
+    virtual tile* clone() const = 0;
+    virtual tile& map_by(const affine&) = 0;
+    virtual tile& crop_to(const screen_mask&) = 0;
+
+    virtual bool is_empty() const = 0;
+
+    // pass length for (e.g.) dash length, marker size
+    virtual std::string print_to(const format&, const std::string&) const = 0;
+    virtual void add_to_pallet() const = 0;
+  }; // end of class tile
+
+} // end of namespace
+
+#endif /* EPIX_TILE */