PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/3rdparty/openexr-1.7.0/ImfConvert.h
00001 
00002 //
00003 // Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
00004 // Digital Ltd. LLC
00005 // 
00006 // All rights reserved.
00007 // 
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are
00010 // met:
00011 // *       Redistributions of source code must retain the above copyright
00012 // notice, this list of conditions and the following disclaimer.
00013 // *       Redistributions in binary form must reproduce the above
00014 // copyright notice, this list of conditions and the following disclaimer
00015 // in the documentation and/or other materials provided with the
00016 // distribution.
00017 // *       Neither the name of Industrial Light & Magic nor the names of
00018 // its contributors may be used to endorse or promote products derived
00019 // from this software without specific prior written permission. 
00020 // 
00021 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00022 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00023 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00024 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
00025 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00027 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00028 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00029 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00030 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00031 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 //
00034 
00035 
00036 #ifndef INCLUDED_IMF_CONVERT_H
00037 #define INCLUDED_IMF_CONVERT_H
00038 
00039 //-----------------------------------------------------------------------------
00040 //
00041 //      Routines for converting between pixel data types,
00042 //      with well-defined behavior for exceptional cases,
00043 //      without depending on how hardware and operating
00044 //      system handle integer overflows and floating-point
00045 //      exceptions.
00046 //
00047 //-----------------------------------------------------------------------------
00048 
00049 #include "half.h"
00050 
00051 
00052 namespace Imf {
00053 
00054 //---------------------------------------------------------
00055 // Conversion from half or float to unsigned int:
00056 //
00057 //      input                   result
00058 //      ---------------------------------------------------
00059 //
00060 //      finite, >= 0            input, cast to unsigned int
00061 //                              (rounds towards zero)
00062 //
00063 //      finite, < 0             0
00064 //
00065 //      NaN                     0
00066 //
00067 //      +infinity               UINT_MAX
00068 //
00069 //      -infinity               0
00070 //
00071 //---------------------------------------------------------
00072 
00073 unsigned int    halfToUint (half h);
00074 unsigned int    floatToUint (float f);
00075 
00076 
00077 //---------------------------------------------------------
00078 // Conversion from unsigned int or float to half:
00079 //
00080 //      input                   result
00081 //      ---------------------------------------------------
00082 //
00083 //      finite,                 closest possible half
00084 //      magnitude <= HALF_MAX
00085 //
00086 //      finite, > HALF_MAX      +infinity
00087 //
00088 //      finite, < -HALF_MAX     -infinity
00089 //
00090 //      NaN                     NaN
00091 //
00092 //      +infinity               +infinity
00093 //
00094 //      -infinity               -infinity
00095 //
00096 //---------------------------------------------------------
00097 
00098 half            uintToHalf (unsigned int ui);
00099 half            floatToHalf (float f);
00100 
00101 
00102 } // namespace Imf
00103 
00104 #endif