///////////////////////////////////////////////////////////////////////////

//

// Copyright (c) 2014, Industrial Light & Magic, a division of Lucas

// Digital Ltd. LLC

// 

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

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// in the documentation and/or other materials provided with the

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///////////////////////////////////////////////////////////////////////////

#ifndef INCLUDED_IMF_IMAGE_CHANNEL_RENAMING_H

#define INCLUDED_IMF_IMAGE_CHANNEL_RENAMING_H

//----------------------------------------------------------------------------

//

//      typedef RenamingMap,

//      helper functions for image channel renaming.

//

//----------------------------------------------------------------------------

#include <ImfNamespace.h>

#include <string>

#include <map>

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

//

// Given a map from old channel names to new channel names,

// rename the channels in an image or image level.

// This function assumes that the channel old-to-new-names

// map has already been checked for collisions.

//

typedef std::map <std::string, std::string> RenamingMap;

template <class ChannelMap>

void

renameChannelsInMap (const RenamingMap oldToNewNames, ChannelMap &channels);

//-----------------------------------------------------------------------------

// Implementation

//-----------------------------------------------------------------------------

template <class ChannelMap>

void

renameChannelsInMap (const RenamingMap oldToNewNames, ChannelMap &channels)

{

    ChannelMap renamedChannels;

    for (typename ChannelMap::const_iterator i = channels.begin();

         i != channels.end();

         ++i)

    {

        RenamingMap::const_iterator j = oldToNewNames.find (i->first);

        std::string newName = (j == oldToNewNames.end())? i->first: j->second;

        renamedChannels[newName] = i->second;

    }

    channels = renamedChannels;

}

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif