resizeimage.h

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#pragma once

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        K. Tingdahl
 Date:          August 2010
________________________________________________________________________

-*/

#include "paralleltask.h"

namespace OD { class RGBImage; };


mClass(Algo) ImageResizer : public ParallelTask
{
public:
                ImageResizer( const OD::RGBImage&, OD::RGBImage& );
                ~ImageResizer();

    void        setLanczosSize(int);    //default is 2;

protected:

    od_int64                    nrIterations() const;
    bool                        doPrepare(int);
    bool                        doWork(od_int64,od_int64,int);
    bool                        doFinish(bool);

    int                         lanczossize_;

    const OD::RGBImage&         input_;
    const unsigned char*        inputimage_;
    bool                        inputowner_;
    int                         inputsize_[2];

    OD::RGBImage&               output_;
    unsigned char*              outputimage_;
    bool                        outputowner_;
    int                         outputsize_[2];

    double                      support0_;
    double                      support1_;
    double                      scale0_;
    double                      scale1_;
    double                      factor0_;
    double                      factor1_;
    char                        nrcomponents_;

};