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cs440-acg/ext/openexr/OpenEXR/IlmImfUtil/ImfImageChannelRenaming.h

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+///////////////////////////////////////////////////////////////////////////
+//
+// 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
+// met:
+// *       Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// *       Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// *       Neither the name of Industrial Light & Magic nor the names of
+// its contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission. 
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////
+
+#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