mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-16 17:22:55 +00:00
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_worklet_zfp_structs_h
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#define vtk_m_worklet_zfp_structs_h
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#define ZFP_MIN_BITS 0 /* minimum number of bits per block */
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#define ZFP_MAX_BITS 4171 /* maximum number of bits per block */
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#define ZFP_MAX_PREC 64 /* maximum precision supported */
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#define ZFP_MIN_EXP -1074 /* minimum floating-point base-2 exponent */
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#include <vtkm/worklet/zfp/ZFPFunctions.h>
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#include <vtkm/worklet/zfp/ZFPTypeInfo.h>
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namespace vtkm
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{
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namespace worklet
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{
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namespace zfp
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{
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struct ZFPStream
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{
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vtkm::UInt32 minbits;
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vtkm::UInt32 maxbits;
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vtkm::UInt32 maxprec;
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vtkm::Int32 minexp;
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template <typename T>
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vtkm::Float64 SetRate(const vtkm::Float64 rate, const vtkm::Int32 dims, T vtkmNotUsed(valueType))
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{
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vtkm::UInt32 n = 1u << (2 * dims);
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vtkm::UInt32 bits = (unsigned int)floor(n * rate + 0.5);
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bits = zfp::MinBits<T>(bits);
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//if (wra) {
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// /* for write random access, round up to next multiple of stream word size */
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// bits += (uint)stream_word_bits - 1;
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// bits &= ~(stream_word_bits - 1);
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//}
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minbits = bits;
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maxbits = bits;
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maxprec = ZFP_MAX_PREC;
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minexp = ZFP_MIN_EXP;
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return (double)bits / n;
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}
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};
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}
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}
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} // namespace vtkm::worklet::zfp
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#endif
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