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

//

// 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

// 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_CONVERT_H

#define INCLUDED_IMF_CONVERT_H

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

//

//	Routines for converting between pixel data types,

//	with well-defined behavior for exceptional cases,

//	without depending on how hardware and operating

//	system handle integer overflows and floating-point

//	exceptions.

//

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

#include "half.h"

#include "ImfExport.h"

#include "ImfNamespace.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

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

// Conversion from half or float to unsigned int:

//

//	input			result

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

//

//	finite, >= 0		input, cast to unsigned int

//				(rounds towards zero)

//

//	finite, < 0		0

//

//	NaN			0

//

//	+infinity		UINT_MAX

//

//	-infinity		0

//

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

IMF_EXPORT unsigned int	halfToUint (half h);

IMF_EXPORT unsigned int	floatToUint (float f);

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

// Conversion from unsigned int or float to half:

//

// 	input			result

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

//

// 	finite,			closest possible half

// 	magnitude <= HALF_MAX

//

// 	finite, > HALF_MAX	+infinity

//

// 	finite, < -HALF_MAX	-infinity

//

// 	NaN			NaN

//

// 	+infinity		+infinity

//

// 	-infinity		-infinity

//

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

IMF_EXPORT half		uintToHalf (unsigned int ui);

IMF_EXPORT half		floatToHalf (float f);

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif