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https://gitlab.kitware.com/vtk/vtk-m
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d77c5812c3
The `vtkm::worklet::Keys` object held a `SortedValuesMap` array, an `Offsets` array, a `Counts` array, and (optionally) a `UniqueKeys` array. Of these, the `Counts` array is redundant because the counts are trivially computed by subtracting adjacent entries in the offsets array. This pattern shows up a lot in VTK-m, and most places we have moved to removing the counts and just using the offsets. This change removes the `Count` array from the `Keys` object. Where the count is needed internally, adjacent offsets are subtracted. The deprecated `GetCounts` method is implemented by copying values into a new array.
82 lines
2.4 KiB
C++
82 lines
2.4 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_exec_internal_ReduceByKeyLookup_h
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#define vtk_m_exec_internal_ReduceByKeyLookup_h
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#include <vtkm/cont/ExecutionObjectBase.h>
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#include <vtkm/StaticAssert.h>
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#include <vtkm/Types.h>
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#include <type_traits>
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namespace vtkm
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{
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namespace exec
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{
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namespace internal
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{
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/// A superclass of `ReduceBykeyLookup` that can be used when no key values are provided.
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///
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template <typename IdPortalType, typename IdComponentPortalType>
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struct ReduceByKeyLookupBase
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{
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VTKM_STATIC_ASSERT((std::is_same<typename IdPortalType::ValueType, vtkm::Id>::value));
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VTKM_STATIC_ASSERT(
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(std::is_same<typename IdComponentPortalType::ValueType, vtkm::IdComponent>::value));
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IdPortalType SortedValuesMap;
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IdPortalType Offsets;
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VTKM_EXEC_CONT
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ReduceByKeyLookupBase(const IdPortalType& sortedValuesMap, const IdPortalType& offsets)
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: SortedValuesMap(sortedValuesMap)
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, Offsets(offsets)
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{
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}
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VTKM_SUPPRESS_EXEC_WARNINGS
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VTKM_EXEC_CONT
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ReduceByKeyLookupBase() {}
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};
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/// \brief Execution object holding lookup info for reduce by key.
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///
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/// A WorkletReduceByKey needs several arrays to map the current output object
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/// to the respective key and group of values. This execution object holds that
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/// state.
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///
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template <typename KeyPortalType, typename IdPortalType, typename IdComponentPortalType>
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struct ReduceByKeyLookup : ReduceByKeyLookupBase<IdPortalType, IdComponentPortalType>
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{
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using KeyType = typename KeyPortalType::ValueType;
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KeyPortalType UniqueKeys;
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VTKM_EXEC_CONT
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ReduceByKeyLookup(const KeyPortalType& uniqueKeys,
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const IdPortalType& sortedValuesMap,
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const IdPortalType& offsets)
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: ReduceByKeyLookupBase<IdPortalType, IdComponentPortalType>(sortedValuesMap, offsets)
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, UniqueKeys(uniqueKeys)
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{
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}
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VTKM_SUPPRESS_EXEC_WARNINGS
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VTKM_EXEC_CONT
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ReduceByKeyLookup() {}
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};
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}
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}
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} // namespace vtkm::exec::internal
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#endif //vtk_m_exec_internal_ReduceByKeyLookup_h
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