iPalette.h

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/*
imagen - Simple object-oriented imaging library
Copyright (C) 2011-2012 Mark D. Procarione

imagen is free software: 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.

imagen 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 General Public License for more details.
*/

#ifndef __IPALETTE_H__
#define __IPALETTE_H__

#include "imagen.h"
#include "iColor.h"

namespace imagen
{
    class iPalette
    {
        public:
            iPalette();

            iPalette( const iPalette &pal );


            iPalette( iPalFormat tp, int num = 10 );


            iPalette( const Iubyte *d, iPalFormat fmt, int num );


            ~iPalette();

            void clear();

            bool isNull() const;


            void setData( const Iubyte *d, iPalFormat fmt, int num );

            const Iubyte *getData() const { return data; }

            int length() const { return len; }

            int getBpp() const { return bpp; }

            int depth() const { return bpp << 3; }

            int dataSize() const { return len*bpp; }

            iPalFormat getFormat() const { return format; }

            void addEntry( iColor entry );


            void delEntry();

            iColor getEntry( int index );


            void setAllocSize( int size ) { prealloclen = size; }


            void resize( int size );

            void swapRGB();


            void convertFormat( iPalFormat fmt, int alpha = 255 );

            iPalette &operator=( const iPalette &pal );

        private:
            void init();

            void reallocate( int num );

        private:
            Iubyte *data;       
            iPalFormat format;  
            int bpp;            

            int prealloclen;    
            int len;            
            int alloc;          
    };
}

#endif // __IPALETTE_H__