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diff --git a/src/libs/curves/imagecurves.h b/src/libs/curves/imagecurves.h
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2004-12-01
+ * Description : image curves manipulation methods.
+ *
+ * Copyright (c) 2004-2008 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ *
+ * 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, 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.
+ *
+ * ============================================================ */
+
+#ifndef IMAGECURVES_H
+#define IMAGECURVES_H
+
+#define ROUND(x) ((int) ((x) + 0.5))
+
+// TQt includes.
+
+#include <tqpoint.h>
+#include <tqpointarray.h>
+
+// KDE includes.
+
+#include <kurl.h>
+
+// Digikam includes.
+
+#include "digikam_export.h"
+
+namespace Digikam
+{
+
+class ImageCurvesPriv;
+
+class DIGIKAM_EXPORT ImageCurves
+{
+
+public:
+
+    enum CurveType
+    {
+        CURVE_SMOOTH = 0,            // Smooth curve type
+        CURVE_FREE                   // Freehand curve type.
+    };
+
+    typedef double CRMatrix[4][4];
+
+public:
+
+    ImageCurves(bool sixteenBit);
+    ~ImageCurves();
+
+    // Methods for to manipulate the curves data.
+
+    bool   isDirty();
+    bool   isSixteenBits();
+    void   curvesReset();
+    void   curvesChannelReset(int channel);
+    void   curvesCalculateCurve(int channel);
+    float  curvesLutFunc(int n_channels, int channel, float value);
+    void   curvesLutSetup(int nchannels);
+    void   curvesLutProcess(uchar *srcPR, uchar *destPR, int w, int h);
+
+    // Methods for to set manually the curves values.
+
+    void   setCurveValue(int channel, int bin, int val);
+    void   setCurvePointX(int channel, int point, int x);
+    void   setCurvePointY(int channel, int point, int y);
+    void   setCurveType(int channel, CurveType type);
+
+    void   setCurvePoint(int channel, int point, const TQPoint& val);
+    void   setCurvePoints(int channel, const TQPointArray& vals);
+
+    int    getCurveValue(int channel, int bin);
+    int    getCurvePointX(int channel, int point);
+    int    getCurvePointY(int channel, int point);
+    int    getCurveType(int channel);
+
+    TQPoint getCurvePoint(int channel, int point);
+    TQPointArray getCurvePoints(int channel);
+
+    // Methods for to save/load the curves values to/from a Gimp curves text file.        
+
+    bool   saveCurvesToGimpCurvesFile(const KURL& fileUrl);
+    bool   loadCurvesFromGimpCurvesFile(const KURL& fileUrl);
+
+private:
+
+    void curvesPlotCurve(int channel, int p1, int p2, int p3, int p4);
+    void curvesCRCompose(CRMatrix a, CRMatrix b, CRMatrix ab);
+
+private:
+
+    ImageCurvesPriv* d;
+};
+
+}  // NameSpace Digikam
+
+#endif /* IMAGECURVES_H */