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+/*************************************************************************
+ *
+ *  OpenOffice.org - a multi-platform office productivity suite
+ *
+ *  $RCSfile: colormisc.hxx,v $
+ *
+ *  $Revision: 1.1 $
+ *
+ *  last change: $Author: thb $ $Date: 2006-06-30 13:36:14 $
+ *
+ *  The Contents of this file are made available subject to
+ *  the terms of GNU Lesser General Public License Version 2.1.
+ *
+ *
+ *    GNU Lesser General Public License Version 2.1
+ *    =============================================
+ *    Copyright 2005 by Sun Microsystems, Inc.
+ *    901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *    This library is free software; you can redistribute it and/or
+ *    modify it under the terms of the GNU Lesser General Public
+ *    License version 2.1, as published by the Free Software Foundation.
+ *
+ *    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., 59 Temple Place, Suite 330, Boston,
+ *    MA  02111-1307  USA
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_BASEBMP_COLORMISC_HXX
+#define INCLUDED_BASEBMP_COLORMISC_HXX
+
+#include <basebmp/color.hxx>
+#include <basebmp/accessoradapters.hxx>
+#include <vigra/mathutil.hxx>
+
+// Contents of this header moved out of color.hxx, as it is not useful
+// for the general public (drags in vigra and other template
+// functionality, that shouldn't be necessary for the ordinary client
+// of BitmapDevice etc.)
+
+namespace basebmp
+{
+
+struct ColorBitmaskOutputMaskFunctor
+{
+    Color operator()( Color v1, sal_uInt8 m, Color v2 ) const
+    {
+        return Color(v1.toInt32()*(sal_uInt8)(1-m) + v2.toInt32()*m);
+    }
+};
+
+/// Specialized output mask functor for Color value type
+template<> struct outputMaskFunctorSelector< Color, sal_uInt8, FastMask >
+{
+    typedef ColorBitmaskOutputMaskFunctor type;
+};
+
+struct ColorBlendFunctor
+{
+    Color operator()( sal_uInt8 alpha,
+                      Color     v1,
+                      Color     v2 ) const
+    {
+        const sal_uInt8 v1_red( v1.getRed() );
+        const sal_uInt8 v1_green( v1.getGreen() );
+        const sal_uInt8 v1_blue( v1.getBlue() );
+
+        // using '>> 8' instead of '/ 0x100' is ill-advised (shifted
+        // value might be negative). Better rely on decent optimizer
+        // here...
+        return Color(((((sal_Int32)v2.getRed() - v1_red)*alpha) / 0x100) + v1_red,
+                     ((((sal_Int32)v2.getGreen() - v1_green)*alpha) / 0x100) + v1_green,
+                     ((((sal_Int32)v2.getBlue() - v1_blue)*alpha) / 0x100) + v1_blue);
+    }
+};
+
+/// Specialized metafunction to select blend functor for Color value types
+template<> struct blendFunctorSelector<Color, sal_uInt8>
+{
+    typedef ColorBlendFunctor type;
+};
+
+} // namespace basebmp
+
+namespace vigra
+{
+
+template<>
+struct NumericTraits<basebmp::Color>
+{
+    typedef basebmp::Color Type;
+    typedef basebmp::Color Promote;
+    typedef basebmp::Color RealPromote;
+    typedef std::complex<basebmp::Color> ComplexPromote;
+    typedef sal_uInt8 ValueType;
+
+    typedef VigraTrueType  isIntegral;
+    typedef VigraFalseType isScalar;
+    typedef VigraTrueType  isSigned;
+    typedef VigraTrueType  isOrdered;
+    typedef VigraFalseType isComplex;
+
+    static Type zero() { return Type(); }
+    static Type one() { return Type(0x01010101); }
+    static Type nonZero() { return Type(0x01010101); }
+
+    static Promote toPromote(const Type& v) { return v; }
+    static RealPromote toRealPromote(const Type& v) { return v; }
+    static Type fromPromote(const Promote& v) { return v; }
+    static Type fromRealPromote(const RealPromote& v) { return v; }
+};
+
+} // namespace vigra
+
+#endif /* INCLUDED_BASEBMP_COLORMISC_HXX */