PColorMap.h

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/***************************************
        Auteur : Pierre Aubert
        Mail : pierre.aubert@lapp.in2p3.fr
        Licence : CeCILL-C
****************************************/
 
#ifndef __PCOLORMAP_H__
#define __PCOLORMAP_H__
 
#include <map>
#include "PString.h"

typedef unsigned char color_t;

struct PColorValue{
        float value;
        color_t r;
        color_t g;
        color_t b;
        color_t a;
};

typedef std::map<float, PColorValue> PMapColorValue;
 
PColorValue createColorValue(float value, const PString & color);
PColorValue createColorValue(float value, color_t red, color_t green, color_t blue, color_t alpha = 255);
void getColorValue(color_t & red, color_t & green, color_t & blue, color_t & alpha, const PColorValue & color);

class PColorMap{
        public:
                PColorMap();
                PColorMap(const PColorMap & other);
                virtual ~PColorMap();
                PColorMap & operator = (const PColorMap & other);
                
                void addColor(float value, const PString & color);
                void addColor(float value, color_t red, color_t green, color_t blue, color_t alpha = 255);
                
                void interpolate(color_t & red, color_t & green, color_t & blue, float value) const;
                void interpolate(color_t & red, color_t & green, color_t & blue, color_t & alpha, float value) const;
                void interpolate(PColorValue & output, float value) const;
                
        protected:
                void copyPColorMap(const PColorMap & other);
                
        private:
                void initialisationPColorMap();
                PMapColorValue p_mapColor;
};
 
void phoenix_interpolateColor(PColorValue & output, const PColorValue & colorMin, const PColorValue & colorMax, float value);
PColorValue phoenix_interpolateColor(const PColorValue & colorMin, const PColorValue & colorMax, float value);
 
#endif