mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 10:35:42 +00:00
112 lines
3.1 KiB
C++
112 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_encode1_h
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#define vtk_m_worklet_zfp_encode1_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/ZFPEncode.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 GatherPartial1(Scalar* q,
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const PortalType& scalars,
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vtkm::Id offset,
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int nx,
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int sx)
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{
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vtkm::Id x;
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for (x = 0; x < nx; x++, offset += sx)
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q[x] = scalars.Get(offset);
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PadBlock(q, vtkm::UInt32(nx), 1);
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}
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template <typename Scalar, typename PortalType>
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VTKM_EXEC inline void Gather1(Scalar* fblock, const PortalType& scalars, vtkm::Id offset, int sx)
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{
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vtkm::Id counter = 0;
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for (vtkm::Id x = 0; x < 4; x++, offset += sx)
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{
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fblock[counter] = scalars.Get(offset);
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counter++;
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}
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}
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struct Encode1 : 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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Encode1(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, WholeArrayIn, AtomicArrayInOut bitstream);
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template <class InputScalarPortal, typename BitstreamPortal>
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VTKM_EXEC void operator()(const vtkm::Id blockIdx,
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const 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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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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constexpr vtkm::Int32 BlockSize = 4;
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Scalar fblock[BlockSize];
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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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GatherPartial1(fblock, scalars, logicalStart, nx, 1);
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}
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else
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{
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Gather1(fblock, scalars, logicalStart, 1);
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}
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zfp::ZFPBlockEncoder<BlockSize, Scalar, BitstreamPortal> encoder;
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encoder.encode(fblock, static_cast<vtkm::Int32>(MaxBits), vtkm::UInt32(blockIdx), stream);
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}
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};
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}
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}
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}
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#endif
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