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Open Source Computer Vision Library
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104 lines
3.2 KiB
104 lines
3.2 KiB
/////////////////////////////////////////////////////////////////////////// |
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// |
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// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas |
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// Digital Ltd. LLC |
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// |
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// All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Industrial Light & Magic nor the names of |
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// its contributors may be used to endorse or promote products derived |
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// from this software without specific prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// |
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/////////////////////////////////////////////////////////////////////////// |
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#ifndef INCLUDED_IMF_CONVERT_H |
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#define INCLUDED_IMF_CONVERT_H |
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//----------------------------------------------------------------------------- |
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// |
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// Routines for converting between pixel data types, |
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// with well-defined behavior for exceptional cases, |
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// without depending on how hardware and operating |
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// system handle integer overflows and floating-point |
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// exceptions. |
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// |
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//----------------------------------------------------------------------------- |
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#include "half.h" |
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namespace Imf { |
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//--------------------------------------------------------- |
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// Conversion from half or float to unsigned int: |
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// |
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// input result |
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// --------------------------------------------------- |
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// |
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// finite, >= 0 input, cast to unsigned int |
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// (rounds towards zero) |
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// |
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// finite, < 0 0 |
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// |
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// NaN 0 |
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// |
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// +infinity UINT_MAX |
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// |
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// -infinity 0 |
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// |
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//--------------------------------------------------------- |
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unsigned int halfToUint (half h); |
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unsigned int floatToUint (float f); |
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//--------------------------------------------------------- |
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// Conversion from unsigned int or float to half: |
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// |
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// input result |
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// --------------------------------------------------- |
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// |
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// finite, closest possible half |
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// magnitude <= HALF_MAX |
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// |
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// finite, > HALF_MAX +infinity |
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// |
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// finite, < -HALF_MAX -infinity |
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// |
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// NaN NaN |
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// |
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// +infinity +infinity |
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// |
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// -infinity -infinity |
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// |
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//--------------------------------------------------------- |
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half uintToHalf (unsigned int ui); |
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half floatToHalf (float f); |
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} // namespace Imf |
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#endif
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