mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
111 lines
3.1 KiB
C++
111 lines
3.1 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_decode1_h
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#define vtk_m_worklet_zfp_decode1_h
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#include <vtkm/Types.h>
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#include <vtkm/internal/ExportMacros.h>
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/worklet/zfp/ZFPBlockWriter.h>
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#include <vtkm/worklet/zfp/ZFPDecode.h>
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#include <vtkm/worklet/zfp/ZFPFunctions.h>
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#include <vtkm/worklet/zfp/ZFPStructs.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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template <typename Scalar, typename PortalType>
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VTKM_EXEC inline void ScatterPartial1(const Scalar* q,
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PortalType& scalars,
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vtkm::Id offset,
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vtkm::Int32 nx)
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{
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vtkm::Id x;
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for (x = 0; x < nx; x++, offset++, q++)
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{
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scalars.Set(offset, *q);
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}
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}
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template <typename Scalar, typename PortalType>
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VTKM_EXEC inline void Scatter1(const Scalar* q, PortalType& scalars, vtkm::Id offset)
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{
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for (vtkm::Id x = 0; x < 4; x++, ++offset)
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{
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scalars.Set(offset, *q++);
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} // x
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}
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struct Decode1 : public vtkm::worklet::WorkletMapField
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{
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protected:
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vtkm::Id Dims; // field dims
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vtkm::Id PaddedDims; // dims padded to a multiple of zfp block size
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vtkm::Id ZFPDims; // zfp block dims
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vtkm::UInt32 MaxBits; // bits per zfp block
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public:
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Decode1(const vtkm::Id dims, const vtkm::Id paddedDims, const vtkm::UInt32 maxbits)
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: Dims(dims)
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, PaddedDims(paddedDims)
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, MaxBits(maxbits)
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{
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ZFPDims = PaddedDims / 4;
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}
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using ControlSignature = void(FieldIn, WholeArrayOut, WholeArrayIn bitstream);
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template <typename InputScalarPortal, typename BitstreamPortal>
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VTKM_EXEC void operator()(const vtkm::Id blockIdx,
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InputScalarPortal& scalars,
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BitstreamPortal& stream) const
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{
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using Scalar = typename InputScalarPortal::ValueType;
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constexpr vtkm::Int32 BlockSize = 4;
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Scalar fblock[BlockSize];
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// clear
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for (vtkm::Int32 i = 0; i < BlockSize; ++i)
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{
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fblock[i] = static_cast<Scalar>(0);
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}
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zfp::zfp_decode<BlockSize>(
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fblock, vtkm::Int32(MaxBits), static_cast<vtkm::UInt32>(blockIdx), stream);
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vtkm::Id zfpBlock;
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zfpBlock = blockIdx % ZFPDims;
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vtkm::Id logicalStart = zfpBlock * vtkm::Id(4);
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bool partial = false;
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if (logicalStart + 4 > Dims)
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partial = true;
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if (partial)
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{
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const vtkm::Int32 nx =
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logicalStart + 4 > Dims ? vtkm::Int32(Dims - logicalStart) : vtkm::Int32(4);
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ScatterPartial1(fblock, scalars, logicalStart, nx);
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}
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else
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{
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Scatter1(fblock, scalars, logicalStart);
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}
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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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