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ImfChannelListAttribute.cpp

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002, 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
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///////////////////////////////////////////////////////////////////////////



//-----------------------------------------------------------------------------
//
//    class ChannelListAttribute
//
//-----------------------------------------------------------------------------

#include <ImfChannelListAttribute.h>


namespace Imf {


template <>
const char *
ChannelListAttribute::staticTypeName ()
{
    return "chlist";
}


template <>
void
ChannelListAttribute::writeValueTo (OStream &os, int version) const
{
    for (ChannelList::ConstIterator i = _value.begin();
       i != _value.end();
       ++i)
    {
      //
      // Write name
      //

      Xdr::write <StreamIO> (os, i.name());

      //
      // Write Channel struct
      //

      Xdr::write <StreamIO> (os, int (i.channel().type));
      Xdr::write <StreamIO> (os, i.channel().pLinear);
      Xdr::pad   <StreamIO> (os, 3);
      Xdr::write <StreamIO> (os, i.channel().xSampling);
      Xdr::write <StreamIO> (os, i.channel().ySampling);
    }

    //
    // Write end of list marker
    //

    Xdr::write <StreamIO> (os, "");
}


template <>
void
ChannelListAttribute::readValueFrom (IStream &is, int size, int version)
{
    while (true)
    {
      //
      // Read name; zero length name means end of channel list
      //

      char name[Name::SIZE];
      Xdr::read <StreamIO> (is, sizeof (name), name);

      if (name[0] == 0)
          break;

      //
      // Read Channel struct
      //

      int type;
      bool pLinear;
      int xSampling;
      int ySampling;

      Xdr::read <StreamIO> (is, type);
      Xdr::read <StreamIO> (is, pLinear);
      Xdr::skip <StreamIO> (is, 3);
      Xdr::read <StreamIO> (is, xSampling);
      Xdr::read <StreamIO> (is, ySampling);

      _value.insert
          (name, Channel (PixelType (type), xSampling, ySampling, pLinear));
    }
}


} // namespace Imf

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