c_palette.h

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/*
 * $Id: c_palette.h 18148 2014-11-09 21:36:11Z predoehl $
 */

#ifndef PALETTE_H_PREDOEHL_UOFARIZONAVISION
#define PALETTE_H_PREDOEHL_UOFARIZONAVISION

#include <l_cpp/l_exception.h>
#include <i_cpp/i_pixel.h>
#include <m_cpp/m_vector.h>

#include <vector>


namespace kjb
{

class Palette
{
    std::vector< kjb::PixelRGBA > my_pal;   

public:
    Palette( size_t );

    Palette( const std::vector< kjb::PixelRGBA >& some_pal )
    :   my_pal( some_pal )
    {}

    const kjb::PixelRGBA& operator[]( size_t index ) const
    {
        return my_pal.at( index );
    }

    size_t size() const
    {
        return my_pal.size();
    }

    void swap( size_t iii, size_t jjj )
    {
        std::swap( my_pal.at( iii ), my_pal.at( jjj ) );
    }

    typedef kjb::PixelRGBA ( Palette::* PIXOP )( const kjb::Vector& ) const;


    kjb::PixelRGBA weighted_sum( const kjb::Vector& ) const;


    kjb::PixelRGBA pick_max( const kjb::Vector& weights ) const
    {
        int max_index;
        if (weights.get_length() != (int)size() ) KJB_THROW(Illegal_argument);
        weights.max( &max_index );
        return my_pal[ max_index ];
    }
};

} // namespace kjb

#endif