src/core/fractals/accumulator.h

/*Copyright (c) 2010 Maxime Petitjean

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.*/

#ifndef _ACCUMULATOR_H_
#define _ACCUMULATOR_H_

#include "sequence.h"
#include "../fractalparameters.h"
#include "../palette.h"

#include <QtCore/QFile>
#include <QtGui/QImage>

class Accumulator
{
protected:
        FractalParameters const * m_fractal_parameters;
        QVarLengthArray<unsigned int> m_buffer;

        qreal m_inv_x_step;
        qreal m_inv_y_step;
        unsigned int m_buffer_size;

public:
        Accumulator( const FractalParameters * _fractal_parameters );

        QImage toImage( const Palette& _palette ) const;

        virtual void accumulate( const Point& _init_point, const PointsSequence& _sequence ) = 0;
        virtual void accumulate( const Accumulator& _accumulator );
        virtual void accumulateAt( const unsigned int _position, const Accumulator& _accumulator );

        virtual int load( QFile& _file );
        virtual int save( QFile& _file ) const;

protected:
        unsigned int bufferPosition( const Point& _point );

};

#endif //_ACCUMULATOR_H_

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