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

//

// 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,

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

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

//

//      Function dataWindowForFile()

//

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

#include "ImfImageDataWindow.h"

#include "ImfImage.h"

#include <ImfHeader.h>

#include <Iex.h>

#include <algorithm>

#include <cassert>

using namespace IMATH_NAMESPACE;

using namespace IEX_NAMESPACE;

using namespace std;

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER

Box2i

dataWindowForFile (const Header &hdr, const Image &img, DataWindowSource dws)

{

    switch (dws)

    {

      case USE_IMAGE_DATA_WINDOW:

        return img.dataWindow();

      case USE_HEADER_DATA_WINDOW:

        {

            if (img.levelMode() != ONE_LEVEL)

                throw ArgExc ("Cannot crop multi-resolution images.");

            const Box2i &hdw = hdr.dataWindow();

            const Box2i &idw = img.dataWindow();

            return Box2i (V2i (max (hdw.min.x, idw.min.x),

                               max (hdw.min.y, idw.min.y)),

                          V2i (min (hdw.max.x, idw.max.x),

                               min (hdw.max.y, idw.max.y)));

        }

      default:

        assert (false);

    }

}

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT