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Diffstat (limited to 'Source/OpenEXR/IlmImf/ImfConvert.h')
-rw-r--r-- | Source/OpenEXR/IlmImf/ImfConvert.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/Source/OpenEXR/IlmImf/ImfConvert.h b/Source/OpenEXR/IlmImf/ImfConvert.h new file mode 100644 index 0000000..fc2c037 --- /dev/null +++ b/Source/OpenEXR/IlmImf/ImfConvert.h @@ -0,0 +1,104 @@ +/////////////////////////////////////////////////////////////////////////// +// +// 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 |