VRegion8.h

// VIPS region wrapper


 

/*


 

    This file is part of VIPS.


 

    VIPS 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 2 of the License, or


    (at your option) any later version.


 

    This program 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, write to the Free Software


    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA


    02110-1301  USA


 

 */


 

/*


 

    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk


 

 */


 

#ifndef VIPS_VREGION_H


#define VIPS_VREGION_H


 

#include <vips/vips.h>


 

VIPS_NAMESPACE_START

 

class VRegion : public VObject {

public:

    explicit VRegion(VipsRegion *region, VSteal steal = STEAL)

        : VObject((VipsObject *) region, steal)

    {

    }

 

    static VRegion


    new_from_image(VImage image);

 

    VipsRegion *

    get_region() const


    {

        return (VipsRegion *) VObject::get_object();

    }

 

    void


    prepare(const VipsRect *rect) const


    {

        if (vips_region_prepare(get_region(), rect))

            throw VError();

    }

 

    void


    prepare(int left, int top, int width, int height) const


    {

        VipsRect rect = { left, top, width, height };

 

        prepare(&rect);

    }

 

    VipsRect

    valid() const


    {

        return get_region()->valid;

    }

 

    VipsPel *

    addr() const


    {

        return addr(0);

    }

 

    VipsPel *

    addr(size_t i) const


    {

        return &VIPS_REGION_ADDR_TOPLEFT(get_region())[i];

    }

 

    VipsPel *

    addr(int x, int y) const


    {

        return VIPS_REGION_ADDR(get_region(), x, y);

    }

 

    size_t


    stride() const


    {

        return VIPS_REGION_LSKIP(get_region());

    }

 

    VipsPel

    operator[](size_t i) const


    {

        return *addr(i);

    }

 

    VipsPel

    operator()(int x, int y) const


    {

        return *addr(x, y);

    }

};

 

VIPS_NAMESPACE_END

 

#endif /*VIPS_VREGION_H*/