Update to 2.0.0 tree from current Fremantle build

[opencv] / 3rdparty / include / OpenEXR / ImfConvert.h

diff --git a/3rdparty/include/OpenEXR/ImfConvert.h b/3rdparty/include/OpenEXR/ImfConvert.h
new file mode 100644 (file)
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+++ b/3rdparty/include/OpenEXR/ImfConvert.h
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+///////////////////////////////////////////////////////////////////////////
+//
+// 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