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

//

// Copyright (c) 2004, 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.

//

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

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

//

//	Utility routines to test quickly if a given

//	file is an OpenEXR file, and whether the

//	file is scanline-based or tiled.

//

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

#include <ImfTestFile.h>

#include <ImfStdIO.h>

#include <ImfXdr.h>

#include <ImfVersion.h>

#include "ImfNamespace.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER

bool

isOpenExrFile

    (const char fileName[],

     bool &tiled,

     bool &deep,

     bool &multiPart)

{

    try

    {

	StdIFStream is (fileName);

	int magic, version;

	Xdr::read <StreamIO> (is, magic);

	Xdr::read <StreamIO> (is, version);

	tiled = isTiled (version);

        deep = isNonImage (version);

        multiPart = isMultiPart (version);

	return magic == MAGIC;

    }

    catch (...)

    {

	tiled = false;

	return false;

    }

}

bool

isOpenExrFile (const char fileName[], bool &tiled, bool &deep)

{

    bool multiPart;

    return isOpenExrFile (fileName, tiled, deep, multiPart);

}

bool

isOpenExrFile (const char fileName[], bool &tiled)

{

    bool deep, multiPart;

    return isOpenExrFile (fileName, tiled, deep, multiPart);

}

bool

isOpenExrFile (const char fileName[])

{

    bool tiled, deep, multiPart;

    return isOpenExrFile (fileName, tiled, deep, multiPart);

}

bool

isTiledOpenExrFile (const char fileName[])

{

    bool exr, tiled, deep, multiPart;

    exr = isOpenExrFile (fileName, tiled, deep, multiPart);

    return exr && tiled;

}

bool

isDeepOpenExrFile (const char fileName[])

{

    bool exr, tiled, deep, multiPart;

    exr = isOpenExrFile (fileName, tiled, deep, multiPart);

    return exr && deep;

}

bool

isMultiPartOpenExrFile (const char fileName[])

{

    bool exr, tiled, deep, multiPart;

    exr = isOpenExrFile (fileName, tiled, deep, multiPart);

    return exr && multiPart;

}

bool

isOpenExrFile

    (IStream &is,

     bool &tiled,

     bool &deep,

     bool &multiPart)

{

    try

    {

	Int64 pos = is.tellg();

	if (pos != 0)

	    is.seekg (0);

	int magic, version;

	Xdr::read <StreamIO> (is, magic);

	Xdr::read <StreamIO> (is, version);

	is.seekg (pos);

	tiled = isTiled (version);

	deep = isNonImage (version);

	multiPart = isMultiPart (version);

	return magic == MAGIC;

    }

    catch (...)

    {

	is.clear();

	tiled = false;

	return false;

    }

}

bool

isOpenExrFile (IStream &is, bool &tiled, bool &deep)

{

    bool multiPart;

    return isOpenExrFile (is, tiled, deep, multiPart);

}

bool

isOpenExrFile (IStream &is, bool &tiled)

{

    bool deep, multiPart;

    return isOpenExrFile (is, tiled, deep, multiPart);

}

bool

isOpenExrFile (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is)

{

    bool tiled, deep, multiPart;

    return isOpenExrFile (is, tiled, deep, multiPart);

}

bool

isTiledOpenExrFile (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is)

{

    bool exr, tiled, deep, multiPart;

    exr = isOpenExrFile (is, tiled, deep, multiPart);

    return exr && tiled;

}

bool

isDeepOpenExrFile (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is)

{

    bool exr, tiled, deep, multiPart;

    exr = isOpenExrFile (is, tiled, deep, multiPart);

    return exr && deep;

}

bool

isMultiPartOpenExrFile (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is)

{

    bool exr, tiled, deep, multiPart;

    exr = isOpenExrFile (is, tiled, deep, multiPart);

    return exr && multiPart;

}

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT