LCOV - code coverage report
Current view: top level - include/basebmp - colormisc.hxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 0 25 0.0 %
Date: 2014-04-14 Functions: 0 6 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef INCLUDED_BASEBMP_COLORMISC_HXX
      21             : #define INCLUDED_BASEBMP_COLORMISC_HXX
      22             : 
      23             : #include <osl/diagnose.h>
      24             : #include <basebmp/color.hxx>
      25             : #include <basebmp/colortraits.hxx>
      26             : #include <basebmp/accessortraits.hxx>
      27             : #include <vigra/mathutil.hxx>
      28             : 
      29             : // Contents of this header moved out of color.hxx, as it is not useful
      30             : // for the general public (drags in vigra and other template
      31             : // functionality, that shouldn't be necessary for the ordinary client
      32             : // of BitmapDevice etc.)
      33             : 
      34             : namespace basebmp
      35             : {
      36             : 
      37             : template< bool polarity > struct ColorBitmaskOutputMaskFunctor;
      38             : template<> struct ColorBitmaskOutputMaskFunctor<true> : MaskFunctorBase<Color,sal_uInt8>
      39             : {
      40             :     Color operator()( Color v1, sal_uInt8 m, Color v2 ) const
      41             :     {
      42             :         OSL_ASSERT(m<=1);
      43             : 
      44             :         return Color(v1.toInt32()*(sal_uInt8)(1-m) + v2.toInt32()*m);
      45             :     }
      46             : };
      47             : template<> struct ColorBitmaskOutputMaskFunctor<false> : MaskFunctorBase<Color,sal_uInt8>
      48             : {
      49           0 :     Color operator()( Color v1, sal_uInt8 m, Color v2 ) const
      50             :     {
      51             :         OSL_ASSERT(m<=1);
      52             : 
      53           0 :         return Color(v1.toInt32()*m + v2.toInt32()*(sal_uInt8)(1-m));
      54             :     }
      55             : };
      56             : 
      57             : /// Specialized output mask functor for Color value type
      58             : template<bool polarity> struct outputMaskFunctorSelector< Color, sal_uInt8, polarity, FastMask >
      59             : {
      60             :     typedef ColorBitmaskOutputMaskFunctor<polarity> type;
      61             : };
      62             : 
      63             : template< bool polarity > struct ColorBlendFunctor8
      64             :   : public TernaryFunctorBase<sal_uInt8,Color,Color,Color>
      65             : {
      66           0 :     Color operator()( sal_uInt8 alpha,
      67             :                       Color     v1,
      68             :                       Color     v2 ) const
      69             :     {
      70           0 :         alpha = polarity ? alpha : 255 - alpha;
      71             : 
      72           0 :         const sal_uInt8 v1_red( v1.getRed() );
      73           0 :         const sal_uInt8 v1_green( v1.getGreen() );
      74           0 :         const sal_uInt8 v1_blue( v1.getBlue() );
      75             : 
      76             :         // using '>> 8' instead of '/ 0x100' is ill-advised (shifted
      77             :         // value might be negative). Better rely on decent optimizer
      78             :         // here...
      79           0 :         return Color(((((sal_Int32)v2.getRed() - v1_red)*alpha) / 0x100) + v1_red,
      80           0 :                      ((((sal_Int32)v2.getGreen() - v1_green)*alpha) / 0x100) + v1_green,
      81           0 :                      ((((sal_Int32)v2.getBlue() - v1_blue)*alpha) / 0x100) + v1_blue);
      82             :     }
      83             : };
      84             : 
      85             : template< bool polarity > struct ColorBlendFunctor32
      86             :   : public TernaryFunctorBase<Color,Color,Color,Color>
      87             : {
      88           0 :     Color operator()( Color input,
      89             :                       Color v1,
      90             :                       Color v2 ) const
      91             :     {
      92           0 :         sal_uInt8 alpha = input.getGreyscale();
      93           0 :         alpha = polarity ? alpha : 255 - alpha;
      94             : 
      95           0 :         const sal_uInt8 v1_red( v1.getRed() );
      96           0 :         const sal_uInt8 v1_green( v1.getGreen() );
      97           0 :         const sal_uInt8 v1_blue( v1.getBlue() );
      98             : 
      99             :         // using '>> 8' instead of '/ 0x100' is ill-advised (shifted
     100             :         // value might be negative). Better rely on decent optimizer
     101             :         // here...
     102           0 :         return Color(((((sal_Int32)v2.getRed() - v1_red)*alpha) / 0x100) + v1_red,
     103           0 :                      ((((sal_Int32)v2.getGreen() - v1_green)*alpha) / 0x100) + v1_green,
     104           0 :                      ((((sal_Int32)v2.getBlue() - v1_blue)*alpha) / 0x100) + v1_blue);
     105             :     }
     106             : };
     107             : 
     108             : 
     109             : 
     110             : template<> struct ColorTraits< Color >
     111             : {
     112             :     /// @return number of color channels
     113             :     static int numChannels() { return 3; }
     114             : 
     115             :     /// Type of a color component (i.e. the type of an individual channel)
     116             :     typedef sal_uInt8 component_type;
     117             : 
     118             :     /// Metafunction to select blend functor from color and alpha type
     119             :     template< typename AlphaType, bool polarity > struct blend_functor;
     120             : 
     121             :     /// Calculate normalized distance between color c1 and c2
     122           0 :     static inline double distance( const Color& c1,
     123             :                                    const Color& c2 )
     124             :     {
     125           0 :         return (c1 - c2).magnitude();
     126             :     }
     127             : 
     128           0 :     static inline component_type toGreyscale( const Color& c )
     129             :     {
     130           0 :         return c.getGreyscale();
     131             :     }
     132             : 
     133           0 :     static inline Color fromGreyscale( component_type c )
     134             :     {
     135           0 :         return Color(c,c,c);
     136             :     }
     137             : };
     138             : 
     139             : /// The version for plain 8 bit alpha
     140             : template<bool polarity> struct ColorTraits< Color >::blend_functor< sal_uInt8, polarity >
     141             : {
     142             :     typedef ColorBlendFunctor8<polarity> type;
     143             : };
     144             : 
     145             : /// The version taking grey value of a Color
     146             : template<bool polarity> struct ColorTraits< Color >::blend_functor< Color, polarity >
     147             : {
     148             :     typedef ColorBlendFunctor32<polarity> type;
     149             : };
     150             : 
     151             : } // namespace basebmp
     152             : 
     153             : namespace vigra
     154             : {
     155             : 
     156             : template<>
     157             : struct NumericTraits<basebmp::Color>
     158             : {
     159             :     typedef basebmp::Color Type;
     160             :     typedef basebmp::Color Promote;
     161             :     typedef basebmp::Color RealPromote;
     162             :     typedef std::complex<basebmp::Color> ComplexPromote;
     163             :     typedef sal_uInt8 ValueType;
     164             : 
     165             :     typedef VigraTrueType  isIntegral;
     166             :     typedef VigraFalseType isScalar;
     167             :     typedef VigraTrueType  isSigned;
     168             :     typedef VigraTrueType  isOrdered;
     169             :     typedef VigraFalseType isComplex;
     170             : 
     171             :     static Type zero() { return Type(); }
     172             :     static Type one() { return Type(0x01010101); }
     173             :     static Type nonZero() { return Type(0x01010101); }
     174             : 
     175             :     static Promote toPromote(const Type& v) { return v; }
     176             :     static RealPromote toRealPromote(const Type& v) { return v; }
     177             :     static Type fromPromote(const Promote& v) { return v; }
     178             :     static Type fromRealPromote(const RealPromote& v) { return v; }
     179             : };
     180             : 
     181             : } // namespace vigra
     182             : 
     183             : #endif /* INCLUDED_BASEBMP_COLORMISC_HXX */
     184             : 
     185             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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