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diff --git a/krita/core/kis_iterator.h b/krita/core/kis_iterator.h
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+/* This file is part of the KDE project
+ *   Copyright (c) 2004 Casper Boemann <cbr@boemann.dkt>
+ *
+ *  This program 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.
+ *
+ *  This program 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 this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+*/
+#ifndef KIS_ITERATOR_H_
+#define KIS_ITERATOR_H_
+
+#include <qglobal.h>
+#include <ksharedptr.h>
+
+class KisTiledRectIterator;
+typedef KSharedPtr<KisTiledRectIterator> KisTiledRectIteratorSP;
+
+class KisTiledVLineIterator;
+typedef KSharedPtr<KisTiledVLineIterator> KisTiledVLineIteratorSP;
+
+class KisTiledHLineIterator;
+typedef KSharedPtr<KisTiledHLineIterator> KisTiledHLineIteratorSP;
+
+class KisDataManager;
+
+/**
+ * The KisRectIterator iterators over a rectangular area in the most efficient order. That is,
+ * there is no guarantee that the iterator will work scanline by scanline.
+ */
+class KisRectIterator
+{
+
+
+public:
+    KisRectIterator ( KisDataManager *dm, Q_INT32  x, Q_INT32  y, Q_INT32  w, Q_INT32  h, bool writable);
+
+public:
+    virtual ~KisRectIterator();
+    KisRectIterator(const KisRectIterator& rhs);
+    KisRectIterator& operator=(const KisRectIterator& rhs);
+
+
+public:
+    /// returns a pointer to the pixel data. Do NOT interpret the data - leave that to a colorstrategy
+    Q_UINT8 * rawData() const;
+
+    /// Returns a pointer to the pixel data as it was at the moment of the last memento creation.
+    const Q_UINT8 * oldRawData() const;
+
+    /// Returns the number of consequtive pixels that we point at
+    /// This is useful for optimizing
+    Q_INT32 nConseqPixels() const;
+
+    /// Advances a number of pixels until it reaches the end of the rect
+    KisRectIterator & operator+=(int n);
+
+    /// Advances one pixel going to the beginning of the next line when it reaches the end of a line
+    KisRectIterator & operator++();
+
+    /// returns true when iterators has reached the end
+    bool isDone()  const;
+
+     // current x position
+     Q_INT32 x() const;
+
+     // current y position
+     Q_INT32 y() const;
+
+private:
+
+    KisTiledRectIteratorSP m_iter;
+};
+
+class KisHLineIterator
+{
+
+public:
+
+    KisHLineIterator ( KisDataManager *dm, Q_INT32  x, Q_INT32 y, Q_INT32 w, bool writable);
+
+public:
+
+    virtual ~KisHLineIterator();
+    KisHLineIterator(const KisHLineIterator& rhs);
+    KisHLineIterator& operator=(const KisHLineIterator& rhs);
+
+public:
+    /// Returns a pointer to the pixel data. Do NOT interpret the data - leave that to a colorstrategy
+    Q_UINT8 *rawData() const;
+
+    /// Returns a pointer to the pixel data as it was at the moment of the last memento creation.
+    const Q_UINT8 *oldRawData() const;
+
+    /// Advances one pixel until it reaches the end of the line
+    KisHLineIterator & operator++();
+
+    /// Returns the number of consequtive horizontal pixels that we point at
+    /// This is useful for optimizing
+    Q_INT32 nConseqHPixels() const;
+
+    /// Advances a number of pixels until it reaches the end of the line
+    KisHLineIterator & operator+=(int n);
+
+    /// Goes back one pixel until it reaches the beginning of the line
+    KisHLineIterator & operator--();
+
+    /// returns true when iterators has reached the end
+    bool isDone()  const;
+
+    /// current x position
+    Q_INT32 x() const;
+
+    /// current y position
+    Q_INT32 y() const;
+
+    /// increment to the next row and rewind to the begining
+    void nextRow();
+
+
+private:
+
+    KisTiledHLineIteratorSP m_iter;
+};
+
+class KisVLineIterator
+{
+
+public:
+    KisVLineIterator ( KisDataManager *dm, Q_INT32  x, Q_INT32 y, Q_INT32  h, bool writable);
+public:
+    ~KisVLineIterator();
+    KisVLineIterator(const KisVLineIterator& rhs);
+    KisVLineIterator& operator=(const KisVLineIterator& rhs);
+
+public:
+    /// returns a pointer to the pixel data. Do NOT interpret the data - leave that to a colorstrategy
+    Q_UINT8 *rawData() const;
+
+    /// Returns a pointer to the pixel data as it was at the moment of the last memento creation.
+    const Q_UINT8 * oldRawData() const;
+
+    /// Advances one pixel until it reaches the end of the line
+    KisVLineIterator & operator++();
+
+    /// returns true when iterators has reached the end
+    bool isDone() const;
+
+    /// current x position
+    Q_INT32 x() const;
+
+    /// current y position
+    Q_INT32 y() const;
+    
+    /// increment to the next column and rewind to the begining
+    void nextCol();
+
+private:
+
+    KisTiledVLineIteratorSP m_iter;
+
+};
+
+#endif