mirror of
https://github.com/opencv/opencv.git
synced 2024-11-30 06:10:02 +08:00
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
|
///////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// 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"
|
||
|
|
|
||
|
|
|
||
|
|
namespace Imf {
|
||
|
|
|
||
|
|
//---------------------------------------------------------
|
||
|
|
// 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
|
||
|
|
//
|
||
|
|
//---------------------------------------------------------
|
||
|
|
|
||
|
|
unsigned int halfToUint (half h);
|
||
|
|
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
|
||
|
|
//
|
||
|
|
//---------------------------------------------------------
|
||
|
|
|
||
|
|
half uintToHalf (unsigned int ui);
|
||
|
|
half floatToHalf (float f);
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace Imf
|
||
|
|
|
||
|
|
#endif
|