132 lines
4.1 KiB
C++
132 lines
4.1 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_encode2_h
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#define vtk_m_worklet_zfp_encode2_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 GatherPartial2(Scalar* q,
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const PortalType& scalars,
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vtkm::Id offset,
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vtkm::Int32 nx,
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vtkm::Int32 ny,
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vtkm::Int32 sx,
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vtkm::Int32 sy)
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{
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vtkm::Id x, y;
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for (y = 0; y < ny; y++, offset += sy - nx * sx)
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{
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for (x = 0; x < nx; x++, offset += 1)
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q[4 * y + x] = scalars.Get(offset);
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PadBlock(q + 4 * y, vtkm::UInt32(nx), 1);
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}
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for (x = 0; x < 4; x++)
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PadBlock(q + x, vtkm::UInt32(ny), 4);
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}
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template <typename Scalar, typename PortalType>
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VTKM_EXEC inline void Gather2(Scalar* fblock,
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const PortalType& scalars,
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vtkm::Id offset,
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int sx,
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int sy)
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{
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vtkm::Id counter = 0;
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for (vtkm::Id y = 0; y < 4; y++, offset += sy - 4 * sx)
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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 Encode2 : public vtkm::worklet::WorkletMapField
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{
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protected:
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vtkm::Id2 Dims; // field dims
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vtkm::Id2 PaddedDims; // dims padded to a multiple of zfp block size
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vtkm::Id2 ZFPDims; // zfp block dims
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vtkm::UInt32 MaxBits; // bits per zfp block
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public:
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Encode2(const vtkm::Id2 dims, const vtkm::Id2 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[0] = PaddedDims[0] / 4;
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ZFPDims[1] = PaddedDims[1] / 4;
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}
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using ControlSignature = void(FieldIn, WholeArrayIn, AtomicArrayInOut bitstream);
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using ExecutionSignature = void(_1, _2, _3);
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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::Id2 zfpBlock;
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zfpBlock[0] = blockIdx % ZFPDims[0];
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zfpBlock[1] = (blockIdx / ZFPDims[0]) % ZFPDims[1];
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vtkm::Id2 logicalStart = zfpBlock * vtkm::Id(4);
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vtkm::Id offset = logicalStart[1] * Dims[0] + logicalStart[0];
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constexpr vtkm::Int32 BlockSize = 16;
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Scalar fblock[BlockSize];
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bool partial = false;
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if (logicalStart[0] + 4 > Dims[0])
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partial = true;
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if (logicalStart[1] + 4 > Dims[1])
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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[0] + 4 > Dims[0] ? vtkm::Int32(Dims[0] - logicalStart[0]) : vtkm::Int32(4);
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const vtkm::Int32 ny =
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logicalStart[1] + 4 > Dims[1] ? vtkm::Int32(Dims[1] - logicalStart[1]) : vtkm::Int32(4);
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GatherPartial2(fblock, scalars, offset, nx, ny, 1, static_cast<vtkm::Int32>(Dims[0]));
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}
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else
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{
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Gather2(fblock, scalars, offset, 1, static_cast<vtkm::Int32>(Dims[0]));
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}
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zfp::ZFPBlockEncoder<BlockSize, Scalar, BitstreamPortal> encoder;
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encoder.encode(fblock, 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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