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       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_COLOR_HXX
      21             : #define INCLUDED_BASEBMP_COLOR_HXX
      22             : 
      23             : #include <sal/types.h>
      24             : #include <rtl/math.hxx>
      25             : 
      26             : namespace basebmp
      27             : {
      28             : 
      29             : class Color
      30             : {
      31             : private:
      32             :     sal_uInt32          mnColor;
      33             : 
      34             : public:
      35             :     typedef sal_uInt32  value_type;
      36             :     typedef sal_uInt8   component_type;
      37             : 
      38           0 :     Color() : mnColor(0) {}
      39           0 :     explicit Color( sal_uInt32 nVal ) : mnColor(nVal) {}
      40           0 :     Color( sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue ) :
      41           0 :         mnColor( ((sal_uInt32)nRed << 16) | ((sal_uInt32)nGreen << 8) | nBlue )
      42           0 :     {}
      43             : 
      44             :     void setRed( sal_uInt8 nRed ) { mnColor &= ~0x00FF0000UL; mnColor |= (sal_uInt32)nRed << 16; }
      45             :     void setGreen( sal_uInt8 nGreen ) { mnColor &= ~0x0000FF00UL; mnColor |= (sal_uInt32)nGreen << 8; }
      46             :     void setBlue( sal_uInt8 nBlue ) { mnColor &= ~0x000000FFUL; mnColor |= nBlue; }
      47             : 
      48             :     void setGrey( sal_uInt8 nGreyVal ) { mnColor = (sal_uInt32)nGreyVal << 16 | (sal_uInt32)nGreyVal << 8 | nGreyVal; }
      49             : 
      50           0 :     sal_uInt8 getRed() const   { return 0xFF & (sal_uInt8)(mnColor >> 16); }
      51           0 :     sal_uInt8 getGreen() const { return 0xFF & (sal_uInt8)(mnColor >> 8); }
      52           0 :     sal_uInt8 getBlue() const  { return 0xFF & (sal_uInt8)mnColor; }
      53             : 
      54           0 :     sal_uInt8 getGreyscale() const { return (sal_uInt8)((getBlue()*28UL +
      55           0 :                                                          getGreen()*151 +
      56           0 :                                                          getRed()*77) / 256); }
      57             : 
      58           0 :     sal_uInt32 toInt32() const { return mnColor; }
      59             : 
      60           0 :     bool  operator!() const { return mnColor == 0; }
      61             :     Color operator&( sal_uInt32 nMask ) const { return Color(mnColor & nMask); }
      62             :     Color operator^( Color col ) const { return Color(col.getRed()^getRed(),
      63             :                                                       col.getGreen()^getGreen(),
      64             :                                                       col.getBlue()^getBlue()); }
      65           0 :     Color operator-( Color col ) const { return Color((sal_uInt8)abs((int)getRed()-col.getRed()),
      66           0 :                                                       (sal_uInt8)abs((int)getGreen()-col.getGreen()),
      67           0 :                                                       (sal_uInt8)abs((int)getBlue()-col.getBlue())); }
      68             :     Color operator+( Color col ) const { return Color(getRed()+col.getRed(),
      69             :                                                       getGreen()+col.getGreen(),
      70             :                                                       getBlue()+col.getBlue()); }
      71             :     Color operator*( Color col ) const { return Color((sal_uInt8)((sal_uInt32)col.getRed()*getRed()/SAL_MAX_UINT8),
      72             :                                                       (sal_uInt8)((sal_uInt32)col.getGreen()*getGreen()/SAL_MAX_UINT8),
      73             :                                                       (sal_uInt8)((sal_uInt32)col.getBlue()*getBlue()/SAL_MAX_UINT8)); }
      74             :     Color operator*( sal_uInt8 n ) const { return Color((sal_uInt8)((sal_uInt32)n*getRed()/SAL_MAX_UINT8),
      75             :                                                         (sal_uInt8)((sal_uInt32)n*getGreen()/SAL_MAX_UINT8),
      76             :                                                         (sal_uInt8)((sal_uInt32)n*getBlue()/SAL_MAX_UINT8)); }
      77             :     Color operator*( double n ) const { return Color((sal_uInt8)(n*getRed()+.5),
      78             :                                                      (sal_uInt8)(n*getGreen()+.5),
      79             :                                                      (sal_uInt8)(n*getBlue()+.5)); }
      80           0 :     bool operator==( const Color& rhs ) const { return (getRed()==rhs.getRed() &&
      81           0 :                                                         getGreen()==rhs.getGreen() &&
      82           0 :                                                         getBlue()==rhs.getBlue()); }
      83             :     bool operator!=( const Color& rhs ) const { return !(*this==rhs); }
      84           0 :     double magnitude() const { return sqrt((double)getRed()*getRed()
      85           0 :                                            + getGreen()*getGreen()
      86           0 :                                            + getBlue()*getBlue()); }
      87             : };
      88             : 
      89             : } // namespace basebmp
      90             : 
      91             : #endif /* INCLUDED_BASEBMP_COLOR_HXX */
      92             : 
      93             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */