Blame IlmImfUtil/ImfImageChannelRenaming.h

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///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2014, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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// 
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// All rights reserved.
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// 
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// *       Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// *       Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// *       Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission. 
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// 
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDED_IMF_IMAGE_CHANNEL_RENAMING_H
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#define INCLUDED_IMF_IMAGE_CHANNEL_RENAMING_H
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//----------------------------------------------------------------------------
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//
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//      typedef RenamingMap,
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//      helper functions for image channel renaming.
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//
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//----------------------------------------------------------------------------
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#include <ImfNamespace.h>
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#include <string>
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#include <map>
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OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
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//
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// Given a map from old channel names to new channel names,
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// rename the channels in an image or image level.
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// This function assumes that the channel old-to-new-names
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// map has already been checked for collisions.
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//
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typedef std::map <std::string, std::string> RenamingMap;
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template <class ChannelMap>
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void
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renameChannelsInMap (const RenamingMap oldToNewNames, ChannelMap &channels);
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//-----------------------------------------------------------------------------
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// Implementation
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//-----------------------------------------------------------------------------
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template <class ChannelMap>
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void
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renameChannelsInMap (const RenamingMap oldToNewNames, ChannelMap &channels)
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{
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    ChannelMap renamedChannels;
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    for (typename ChannelMap::const_iterator i = channels.begin();
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         i != channels.end();
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         ++i)
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    {
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        RenamingMap::const_iterator j = oldToNewNames.find (i->first);
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        std::string newName = (j == oldToNewNames.end())? i->first: j->second;
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        renamedChannels[newName] = i->second;
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    }
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    channels = renamedChannels;
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}
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OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
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#endif