basegfx/source/color/bcolormodifier.cxx

   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 #include <basegfx/color/bcolormodifier.hxx>
  21
  22 //////////////////////////////////////////////////////////////////////////////
  23
  24 namespace basegfx
  25 {
  26     ::basegfx::BColor BColorModifier::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
  27     {
  28         switch(meMode)
  29         {
  30             case BCOLORMODIFYMODE_INTERPOLATE :
  31             {
  32                 return interpolate(maBColor, aSourceColor, mfValue);
  33             }
  34             case BCOLORMODIFYMODE_GRAY :
  35             {
  36                 const double fLuminance(aSourceColor.luminance());
  37                 return ::basegfx::BColor(fLuminance, fLuminance, fLuminance);
  38             }
  39             case BCOLORMODIFYMODE_BLACKANDWHITE :
  40             {
  41                 const double fLuminance(aSourceColor.luminance());
  42
  43                 if(fLuminance < mfValue)
  44                 {
  45                     return ::basegfx::BColor::getEmptyBColor();
  46                 }
  47                 else
  48                 {
  49                     return ::basegfx::BColor(1.0, 1.0, 1.0);
  50                 }
  51             }
  52             case BCOLORMODIFYMODE_INVERT :
  53             {
  54                 return ::basegfx::BColor(1.0 - aSourceColor.getRed(), 1.0 - aSourceColor.getGreen(), 1.0 - aSourceColor.getBlue());
  55             }
  56             case BCOLORMODIFYMODE_LUMINANCE_TO_ALPHA:
  57             {
  58                 const double fAlpha(1.0 - ((aSourceColor.getRed() * 0.2125) + (aSourceColor.getGreen() * 0.7154) + (aSourceColor.getBlue() * 0.0721)));
  59                 return ::basegfx::BColor(fAlpha, fAlpha, fAlpha);
  60             }
  61             default : // BCOLORMODIFYMODE_REPLACE
  62             {
  63                 return maBColor;
  64             }
  65         }
  66     }
  67 } // end of namespace basegfx
  68
  69 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */