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//
// Copyright (c) 2014, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
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#ifndef INCLUDED_IMF_IMAGE_LEVEL_H
#define INCLUDED_IMF_IMAGE_LEVEL_H

//----------------------------------------------------------------------------
//
//      class ImageLevel
//
//      For an explanation of images, levels and channels,
//      see the comments in header file Image.h.
//
//----------------------------------------------------------------------------

#include <ImfImageChannel.h>
#include <ImfImageChannelRenaming.h>
#include <ImathBox.h>
#include <string>
#include "ImfExport.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

class Image;


class ImageLevel
{
  public:

    //
    // Access to the image to which the level belongs.
    //

    Image &                     image ()                {return _image;}
    const Image &               image () const          {return _image;}


    //
    // Access to the level number and the data window of this level.
    //

    int                         xLevelNumber () const   {return _xLevelNumber;}
    int                         yLevelNumber () const   {return _yLevelNumber;}

    const IMATH_NAMESPACE::Box2i & dataWindow () const  {return _dataWindow;}


  protected:
    
    friend class Image;

    ImageLevel (Image& image,
                int xLevelNumber,
                int yLevelNumber);

    virtual ~ImageLevel ();

    virtual void    resize (const IMATH_NAMESPACE::Box2i& dataWindow);

    virtual void    shiftPixels (int dx, int dy);

    virtual void    insertChannel (const std::string& name,
                                   PixelType type,
                                   int xSampling,
                                   int ySampling,
                                   bool pLinear) = 0;

    virtual void    eraseChannel (const std::string& name) = 0;

    virtual void    clearChannels () = 0;

    virtual void    renameChannel (const std::string &oldName,
                                   const std::string &newName) = 0;

    virtual void    renameChannels (const RenamingMap &oldToNewNames) = 0;

	IMF_EXPORT void            throwChannelExists(const std::string& name) const;
	IMF_EXPORT void            throwBadChannelName(const std::string& name) const;
    IMF_EXPORT void            throwBadChannelNameOrType (const std::string& name) const;

  private:

    ImageLevel (const ImageLevel &);                // not implemented
    ImageLevel & operator = (const ImageLevel &);   // not implemented

    Image &                 _image;
    int                     _xLevelNumber;
    int                     _yLevelNumber;
    IMATH_NAMESPACE::Box2i  _dataWindow;
};


OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif