cv/include/utilite/UColorTable.h

/*
*  utilite is a cross-platform library with
*  useful utilities for fast and small developing.
*  Copyright (C) 2010  Mathieu Labbe
*
*  utilite is free library: you can redistribute it and/or modify
*  it under the terms of the GNU Lesser General Public License as published by
*  the Free Software Foundation, either version 3 of the License, or
*  (at your option) any later version.
*
*  utilite is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU Lesser General Public License for more details.
*
*  You should have received a copy of the GNU Lesser General Public License
*  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef COLORTABLE_H
#define COLORTABLE_H

#include "utilite/UtiLiteCvExp.h" // DLL export/import defines

#include <vector>

//
class UTILITECV_EXP UColorTable
{
public:
        enum Size{kSize8 = 8,
                        kSize16 = 16,
                        kSize32 = 32,
                        kSize64 = 64,
                        kSize128 = 128,
                        kSize256 = 256,
                        kSize512 = 512,
                        kSize1024 = 1024,
                        kSize2048 = 2048,
                        kSize4096 = 4096,
                        kSize8192 = 8192,
                        kSize16384 = 16384,
                        kSize32768 = 32768,
                        kSize65536 = 65536,
                        kSize16777216 = 16777216};
public:
        UColorTable(int size);
        virtual ~UColorTable() {}

        static unsigned char INDEXED_TABLE_8[24];
        static unsigned char INDEXED_TABLE_16[48];
        static unsigned char INDEXED_TABLE_32[96];
        static unsigned char INDEXED_TABLE_64[192];
        static unsigned char INDEXED_TABLE_128[384];
        static unsigned char INDEXED_TABLE_256[768];
        static unsigned char INDEXED_TABLE_512[1536];
        static unsigned char INDEXED_TABLE_1024[3076];
        static unsigned char INDEXED_TABLE_2048[6144];
        static unsigned char INDEXED_TABLE_4096[12288];
        static unsigned char INDEXED_TABLE_8192[24576];
        static unsigned char INDEXED_TABLE_16384[49152];
        static unsigned char INDEXED_TABLE_32768[98304];
        static unsigned char INDEXED_TABLE_65536[196608];

        int size() const {return _size;}
        unsigned int getIndex(unsigned char r, unsigned char g, unsigned char b) const;
        void getRgb(unsigned int index, unsigned char & r, unsigned char & g, unsigned char & b) const;

private:
        int _size;
        std::vector<unsigned short> _rgb2indexed;
        unsigned char * _indexedTable;
};

#endif // COLORTABLE_H