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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_BASEBMP_COLORMISC_HXX
+#define INCLUDED_BASEBMP_COLORMISC_HXX
+
+#include <osl/diagnose.h>
+#include <basebmp/color.hxx>
+#include <basebmp/colortraits.hxx>
+#include <basebmp/accessortraits.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
+{
+
+template< bool polarity > struct ColorBitmaskOutputMaskFunctor;
+template<> struct ColorBitmaskOutputMaskFunctor<true> : MaskFunctorBase<Color,sal_uInt8>
+{
+ Color operator()( Color v1, sal_uInt8 m, Color v2 ) const
+ {
+ OSL_ASSERT(m<=1);
+
+ return Color(v1.toInt32()*(sal_uInt8)(1-m) + v2.toInt32()*m);
+ }
+};
+template<> struct ColorBitmaskOutputMaskFunctor<false> : MaskFunctorBase<Color,sal_uInt8>
+{
+ Color operator()( Color v1, sal_uInt8 m, Color v2 ) const
+ {
+ OSL_ASSERT(m<=1);
+
+ return Color(v1.toInt32()*m + v2.toInt32()*(sal_uInt8)(1-m));
+ }
+};
+
+/// Specialized output mask functor for Color value type
+template<bool polarity> struct outputMaskFunctorSelector< Color, sal_uInt8, polarity, FastMask >
+{
+ typedef ColorBitmaskOutputMaskFunctor<polarity> type;
+};
+
+template< bool polarity > struct ColorBlendFunctor8
+ : public TernaryFunctorBase<sal_uInt8,Color,Color,Color>
+{
+ Color operator()( sal_uInt8 alpha,
+ Color v1,
+ Color v2 ) const
+ {
+ alpha = polarity ? alpha : 255 - alpha;
+
+ 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);
+ }
+};
+
+template< bool polarity > struct ColorBlendFunctor32
+ : public TernaryFunctorBase<Color,Color,Color,Color>
+{
+ Color operator()( Color input,
+ Color v1,
+ Color v2 ) const
+ {
+ sal_uInt8 alpha = input.getGreyscale();
+ alpha = polarity ? alpha : 255 - alpha;
+
+ 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);
+ }
+};
+
+//-----------------------------------------------------------------------------
+
+template<> struct ColorTraits< Color >
+{
+ /// @return number of color channels
+ static int numChannels() { return 3; }
+
+ /// Type of a color component (i.e. the type of an individual channel)
+ typedef sal_uInt8 component_type;
+
+ /// Metafunction to select blend functor from color and alpha type
+ template< typename AlphaType, bool polarity > struct blend_functor;
+
+ /// Calculate normalized distance between color c1 and c2
+ static inline double distance( const Color& c1,
+ const Color& c2 )
+ {
+ return (c1 - c2).magnitude();
+ }
+
+ static inline component_type toGreyscale( const Color& c )
+ {
+ return c.getGreyscale();
+ }
+
+ static inline Color fromGreyscale( component_type c )
+ {
+ return Color(c,c,c);
+ }
+};
+
+/// The version for plain 8 bit alpha
+template<bool polarity> struct ColorTraits< Color >::blend_functor< sal_uInt8, polarity >
+{
+ typedef ColorBlendFunctor8<polarity> type;
+};
+
+/// The version taking grey value of a Color
+template<bool polarity> struct ColorTraits< Color >::blend_functor< Color, polarity >
+{
+ typedef ColorBlendFunctor32<polarity> 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 */