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

//

// Copyright (c) 2007, 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,

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//

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

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

//

//	Combine multiple single-view images

//	into one multi-view image.

//

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

#include "makeMultiView.h"

#include "Image.h"

#include <ImfInputFile.h>

#include <ImfOutputFile.h>

#include <ImfChannelList.h>

#include <ImfFrameBuffer.h>

#include <ImfStandardAttributes.h>

#include <ImfMultiView.h>

#include "Iex.h"

#include <map>

#include <algorithm>

#include <iostream>

#include "namespaceAlias.h"

using namespace IMF;

using namespace IMATH_NAMESPACE;

using namespace std;

void

makeMultiView (const vector <string> &viewNames,

	       const vector <const char *> &inFileNames,

	       const char *outFileName,

	       Compression compression,

	       bool verbose)

{

    Header header;

    Image image;

    FrameBuffer outFb;

    //

    // Find the size of the dataWindow, check files

    //

    Box2i d;

    for (size_t i = 0; i < viewNames.size(); ++i)

    {

	InputFile in (inFileNames[i]);

	if (verbose)

	{

	    cout << "reading file " << inFileNames[i] << " "

		    "for " << viewNames[i] << " view" << endl;

	}

	if (hasMultiView (in.header()))

	{

	    THROW (IEX_NAMESPACE::NoImplExc,

		   "The image in file " << inFileNames[i] << " is already a "

		   "multi-view image.  Cannot combine multiple multi-view "

		   "images.");

	}

        header = in.header();

	if (i == 0)

        {

             d=header.dataWindow();

	}else{

             d.extendBy(header.dataWindow());

        }

    }

    image.resize (d);

    header.dataWindow()=d;

    // blow away channels; we'll rebuild them

    header.channels()=ChannelList();

    //

    // Read the input image files

    //

    for (size_t i = 0; i < viewNames.size(); ++i)

    {

	InputFile in (inFileNames[i]);

	if (verbose)

	{

	    cout << "reading file " << inFileNames[i] << " "

		    "for " << viewNames[i] << " view" << endl;

	}

	FrameBuffer inFb;

	for (ChannelList::ConstIterator j = in.header().channels().begin();

	     j != in.header().channels().end();

	     ++j)

	{

	    const Channel &inChannel = j.channel();

	    string inChanName = j.name();

	    string outChanName = insertViewName (inChanName, viewNames, i);

	    image.addChannel (outChanName, inChannel);

            image.channel(outChanName).black();

	    header.channels().insert (outChanName, inChannel);

	    inFb.insert  (inChanName,  image.channel(outChanName).slice());

	    outFb.insert (outChanName, image.channel(outChanName).slice());

	}

	in.setFrameBuffer (inFb);

	in.readPixels (in.header().dataWindow().min.y, in.header().dataWindow().max.y);

    }

    //

    // Write the output image file

    //

    {

	header.compression() = compression;

	addMultiView (header, viewNames);

	OutputFile out (outFileName, header);

	if (verbose)

	    cout << "writing file " << outFileName << endl;

	out.setFrameBuffer (outFb);

	out.writePixels

	    (header.dataWindow().max.y - header.dataWindow().min.y + 1);

    }

}