slideshow/source/inc/rgbcolor.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_RGBCOLOR_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_RGBCOLOR_HXX
  22
  23 #include <cppcanvas/color.hxx>
  24
  25
  26 /* Definition of RGBColor class */
  27
  28 namespace slideshow
  29 {
  30     namespace internal
  31     {
  32         class HSLColor;
  33
  34         /** RGB color space class.
  35          */
  36         class RGBColor
  37         {
  38         public:
  39             RGBColor();
  40             explicit RGBColor( ::cppcanvas::Color::IntSRGBA nRGBColor );
  41             RGBColor( double nRed, double nGreen, double nBlue );
  42             explicit RGBColor( const HSLColor& rColor );
  43
  44             /** Get the RGB red value.
  45              */
  46             double getRed() const {  return maRGBTriple.mnRed; }
  47
  48             /** Get the RGB green value.
  49              */
  50             double getGreen() const {  return maRGBTriple.mnGreen; }
  51
  52             /** Get the RGB blue value.
  53              */
  54             double getBlue() const {  return maRGBTriple.mnBlue; }
  55
  56             /** Create an integer sRGBA color.
  57              */
  58             ::cppcanvas::Color::IntSRGBA getIntegerColor() const;
  59
  60             struct RGBTriple
  61             {
  62                 RGBTriple();
  63                 RGBTriple( double nRed, double nGreen, double nBlue );
  64
  65                 double mnRed;
  66                 double mnGreen;
  67                 double mnBlue;
  68             };
  69
  70         private:
  71             // default copy/assignment are okay
  72             // RGBColor(const RGBColor&);
  73             // RGBColor& operator=( const RGBColor& );
  74
  75             RGBTriple   maRGBTriple;
  76         };
  77
  78         bool operator==( const RGBColor& rLHS, const RGBColor& rRHS );
  79         bool operator!=( const RGBColor& rLHS, const RGBColor& rRHS );
  80         RGBColor operator+( const RGBColor& rLHS, const RGBColor& rRHS );
  81         RGBColor operator*( const RGBColor& rLHS, const RGBColor& rRHS );
  82         RGBColor operator*( double nFactor, const RGBColor& rRHS );
  83
  84
  85         /** RGB color linear interpolator.
  86
  87             @param t
  88             As usual, t must be in the [0,1] range
  89         */
  90         RGBColor interpolate( const RGBColor& rFrom, const RGBColor& rTo, double t );
  91     }
  92 }
  93
  94 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_RGBCOLOR_HXX
  95
  96 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */