mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 21:33:55 +00:00
3813fb515c
Using this internal class is a bit tricky because it requires a pointer to a C array that is expected to contain portals. Both the C array and the portals must be defined for the expected device. This is already handled by the associated Storage. Assuming all of this holds, make sure the `ArrayPortalRecombineVec` is trivially copyable. This is a requirement for passing objects to the execution environment.
620 lines
23 KiB
C++
620 lines
23 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_cont_ArrayHandleRecombineVec_h
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#define vtk_m_cont_ArrayHandleRecombineVec_h
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#include <vtkm/cont/ArrayExtractComponent.h>
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#include <vtkm/cont/ArrayHandleMultiplexer.h>
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#include <vtkm/cont/ArrayHandleStride.h>
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#include <vtkm/cont/DeviceAdapterTag.h>
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#include <vtkm/VecVariable.h>
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#include <vtkm/internal/ArrayPortalValueReference.h>
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namespace vtkm
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{
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namespace internal
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{
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template <typename PortalType>
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class RecombineVec
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{
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vtkm::VecCConst<PortalType> Portals;
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vtkm::Id Index;
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public:
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using ComponentType = typename std::remove_const<typename PortalType::ValueType>::type;
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RecombineVec(const RecombineVec&) = default;
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VTKM_EXEC_CONT RecombineVec(const vtkm::VecCConst<PortalType>& portals, vtkm::Id index)
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: Portals(portals)
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, Index(index)
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{
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}
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VTKM_EXEC_CONT vtkm::IdComponent GetNumberOfComponents() const
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{
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return this->Portals.GetNumberOfComponents();
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}
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VTKM_EXEC_CONT
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vtkm::internal::ArrayPortalValueReference<PortalType> operator[](vtkm::IdComponent cIndex) const
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{
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return vtkm::internal::ArrayPortalValueReference<PortalType>(this->Portals[cIndex],
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this->Index);
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}
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template <typename T, vtkm::IdComponent DestSize>
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VTKM_EXEC_CONT void CopyInto(vtkm::Vec<T, DestSize>& dest) const
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{
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vtkm::IdComponent numComponents = vtkm::Min(DestSize, this->GetNumberOfComponents());
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for (vtkm::IdComponent cIndex = 0; cIndex < numComponents; ++cIndex)
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{
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dest[cIndex] = this->Portals[cIndex].Get(this->Index);
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}
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// Clear out any components not held by this dynamic Vec-like
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for (vtkm::IdComponent cIndex = numComponents; cIndex < DestSize; ++cIndex)
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{
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dest[cIndex] = vtkm::TypeTraits<T>::ZeroInitialization();
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}
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}
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VTKM_EXEC_CONT vtkm::Id GetIndex() const { return this->Index; }
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VTKM_EXEC_CONT RecombineVec& operator=(const RecombineVec& src)
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{
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this->DoCopy(src);
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator=(const T& src)
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{
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this->DoCopy(src);
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return *this;
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}
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VTKM_EXEC_CONT operator ComponentType() const { return this->Portals[0].Get(this->Index); }
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template <vtkm::IdComponent N>
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VTKM_EXEC_CONT operator vtkm::Vec<ComponentType, N>() const
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{
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vtkm::Vec<ComponentType, N> result;
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this->CopyInto(result);
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return result;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator+=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] += VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator-=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] -= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator*=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] *= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator/=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] /= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator%=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] %= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator&=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] &= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator|=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] |= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator^=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] ^= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator>>=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] >>= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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template <typename T, typename = typename std::enable_if<vtkm::HasVecTraits<T>::value>::type>
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VTKM_EXEC_CONT RecombineVec& operator<<=(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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VTKM_ASSERT(this->GetNumberOfComponents() == VTraits::GetNumberOfComponents(src));
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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(*this)[cIndex] <<= VTraits::GetComponent(src, cIndex);
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}
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return *this;
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}
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private:
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template <typename T>
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VTKM_EXEC_CONT void DoCopy(const T& src)
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{
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using VTraits = vtkm::VecTraits<T>;
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vtkm::IdComponent numComponents = VTraits::GetNumberOfComponents(src);
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if (numComponents > 1)
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{
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if (numComponents > this->GetNumberOfComponents())
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{
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numComponents = this->GetNumberOfComponents();
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}
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for (vtkm::IdComponent cIndex = 0; cIndex < numComponents; ++cIndex)
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{
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this->Portals[cIndex].Set(this->Index,
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static_cast<ComponentType>(VTraits::GetComponent(src, cIndex)));
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}
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}
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else
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{
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// Special case when copying from a scalar
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for (vtkm::IdComponent cIndex = 0; cIndex < this->GetNumberOfComponents(); ++cIndex)
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{
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this->Portals[cIndex].Set(this->Index,
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static_cast<ComponentType>(VTraits::GetComponent(src, 0)));
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}
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}
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}
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};
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} // namespace internal
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template <typename PortalType>
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struct TypeTraits<vtkm::internal::RecombineVec<PortalType>>
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{
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private:
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using VecType = vtkm::internal::RecombineVec<PortalType>;
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using ComponentType = typename VecType::ComponentType;
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public:
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using NumericTag = typename vtkm::TypeTraits<ComponentType>::NumericTag;
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using DimensionalityTag = vtkm::TypeTraitsVectorTag;
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VTKM_EXEC_CONT static vtkm::internal::RecombineVec<PortalType> ZeroInitialization()
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{
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// Return a vec-like of size 0.
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return vtkm::internal::RecombineVec<PortalType>{};
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}
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};
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template <typename PortalType>
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struct VecTraits<vtkm::internal::RecombineVec<PortalType>>
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{
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using VecType = vtkm::internal::RecombineVec<PortalType>;
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using ComponentType = typename VecType::ComponentType;
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using BaseComponentType = typename vtkm::VecTraits<ComponentType>::BaseComponentType;
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using HasMultipleComponents = vtkm::VecTraitsTagMultipleComponents;
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using IsSizeStatic = vtkm::VecTraitsTagSizeVariable;
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VTKM_EXEC_CONT static vtkm::IdComponent GetNumberOfComponents(const VecType& vector)
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{
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return vector.GetNumberOfComponents();
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}
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VTKM_EXEC_CONT
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static ComponentType GetComponent(const VecType& vector, vtkm::IdComponent componentIndex)
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{
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return vector[componentIndex];
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}
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VTKM_EXEC_CONT static void SetComponent(const VecType& vector,
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vtkm::IdComponent componentIndex,
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const ComponentType& component)
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{
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vector[componentIndex] = component;
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}
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template <vtkm::IdComponent destSize>
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VTKM_EXEC_CONT static void CopyInto(const VecType& src, vtkm::Vec<ComponentType, destSize>& dest)
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{
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src.CopyInto(dest);
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}
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};
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namespace internal
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{
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template <typename SourcePortalType>
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class ArrayPortalRecombineVec
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{
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// Note that this ArrayPortal has a pointer to a C array of other portals. We need to
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// make sure that the pointer is valid on the device we are using it on. See the
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// CreateReadPortal and CreateWritePortal in the Storage below to see how that is
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// managed.
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const SourcePortalType* Portals;
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vtkm::IdComponent NumberOfComponents;
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public:
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using ValueType = vtkm::internal::RecombineVec<SourcePortalType>;
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ArrayPortalRecombineVec() = default;
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ArrayPortalRecombineVec(const SourcePortalType* portals, vtkm::IdComponent numComponents)
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: Portals(portals)
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, NumberOfComponents(numComponents)
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{
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}
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VTKM_EXEC_CONT vtkm::Id GetNumberOfValues() const { return this->Portals[0].GetNumberOfValues(); }
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VTKM_EXEC_CONT ValueType Get(vtkm::Id index) const
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{
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return ValueType({ this->Portals, this->NumberOfComponents }, index);
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}
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VTKM_EXEC_CONT void Set(vtkm::Id index, const ValueType& value) const
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{
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// The ValueType is actually a reference back to the portals, and sets to it should
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// already be set in the portal. Thus, we don't really need to do anything.
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VTKM_ASSERT(value.GetIndex() == index);
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}
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template <typename T>
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VTKM_EXEC_CONT void Set(vtkm::Id index, const T& value) const
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{
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using Traits = vtkm::VecTraits<T>;
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VTKM_ASSERT(Traits::GetNumberOfComponents(value) == this->NumberOfComponents);
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for (vtkm::IdComponent cIndex = 0; cIndex < this->NumberOfComponents; ++cIndex)
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{
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this->Portals[cIndex].Set(index, Traits::GetComponent(value, cIndex));
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}
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}
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};
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}
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} // namespace vtkm::internal
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namespace vtkm
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{
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namespace cont
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{
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namespace internal
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{
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struct StorageTagRecombineVec
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{
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};
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namespace detail
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{
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// Note: Normally a decorating ArrayHandle holds the buffers of the arrays it is decorating
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// in its list of arrays. However, the numbers of buffers is expected to be compile-time static
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// and ArrayHandleRecombineVec needs to set the number of buffers at runtime. We cheat around
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// this by stuffing the decorated buffers in the metadata. To make sure deep copies work
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// right, a copy of the metadata results in a deep copy of the contained buffers. The
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// vtkm::cont::internal::Buffer holding the metadata is not supposed to copy the metadata
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// except for a deep copy (and when it is first set). If this behavior changes, there could
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// be a performance degredation.
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struct RecombineVecMetaData
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{
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mutable std::vector<vtkm::cont::internal::Buffer> PortalBuffers;
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std::vector<std::vector<vtkm::cont::internal::Buffer>> ArrayBuffers;
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RecombineVecMetaData() = default;
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RecombineVecMetaData(const RecombineVecMetaData& src) { *this = src; }
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RecombineVecMetaData& operator=(const RecombineVecMetaData& src)
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{
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this->ArrayBuffers.resize(src.ArrayBuffers.size());
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for (std::size_t arrayIndex = 0; arrayIndex < src.ArrayBuffers.size(); ++arrayIndex)
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{
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this->ArrayBuffers[arrayIndex].resize(src.ArrayBuffers[arrayIndex].size());
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for (std::size_t bufferIndex = 0; bufferIndex < src.ArrayBuffers[arrayIndex].size();
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++bufferIndex)
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{
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this->ArrayBuffers[arrayIndex][bufferIndex].DeepCopyFrom(
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src.ArrayBuffers[arrayIndex][bufferIndex]);
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}
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}
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this->PortalBuffers.clear();
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// Intentionally not copying portals. Portals will be recreated from proper array when requsted.
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return *this;
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}
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};
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template <typename T>
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using RecombinedPortalType = vtkm::internal::ArrayPortalMultiplexer<
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typename vtkm::cont::internal::Storage<T, vtkm::cont::StorageTagStride>::ReadPortalType,
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typename vtkm::cont::internal::Storage<T, vtkm::cont::StorageTagStride>::WritePortalType>;
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template <typename T>
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using RecombinedValueType = vtkm::internal::RecombineVec<RecombinedPortalType<T>>;
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} // namespace detail
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template <typename ReadWritePortal>
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class Storage<vtkm::internal::RecombineVec<ReadWritePortal>,
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vtkm::cont::internal::StorageTagRecombineVec>
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{
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using ComponentType = typename ReadWritePortal::ValueType;
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using SourceStorage = vtkm::cont::internal::Storage<ComponentType, vtkm::cont::StorageTagStride>;
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using ArrayType = vtkm::cont::ArrayHandle<ComponentType, vtkm::cont::StorageTagStride>;
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VTKM_STATIC_ASSERT(
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(std::is_same<ReadWritePortal, detail::RecombinedPortalType<ComponentType>>::value));
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template <typename Buff>
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VTKM_CONT static Buff* BuffersForComponent(Buff* buffers, vtkm::IdComponent componentIndex)
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{
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return buffers[0]
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.template GetMetaData<detail::RecombineVecMetaData>()
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.ArrayBuffers[componentIndex]
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.data();
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}
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public:
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VTKM_STORAGE_NO_RESIZE;
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using ReadPortalType = vtkm::internal::ArrayPortalRecombineVec<ReadWritePortal>;
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using WritePortalType = vtkm::internal::ArrayPortalRecombineVec<ReadWritePortal>;
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VTKM_CONT static vtkm::IdComponent NumberOfComponents(const vtkm::cont::internal::Buffer* buffers)
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{
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return static_cast<vtkm::IdComponent>(
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buffers[0].GetMetaData<detail::RecombineVecMetaData>().ArrayBuffers.size());
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}
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VTKM_CONT static vtkm::IdComponent GetNumberOfBuffers() { return 1; }
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VTKM_CONT static vtkm::Id GetNumberOfValues(const vtkm::cont::internal::Buffer* buffers)
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{
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return SourceStorage::GetNumberOfValues(BuffersForComponent(buffers, 0));
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}
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VTKM_CONT static ReadPortalType CreateReadPortal(const vtkm::cont::internal::Buffer* buffers,
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vtkm::cont::DeviceAdapterId device,
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vtkm::cont::Token& token)
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{
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vtkm::IdComponent numComponents = NumberOfComponents(buffers);
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// The array portal needs a runtime-allocated array of portals for each component.
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// We use the vtkm::cont::internal::Buffer object to allow us to allocate memory on the
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// device and copy data there.
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vtkm::cont::internal::Buffer portalBuffer;
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portalBuffer.SetNumberOfBytes(static_cast<vtkm::BufferSizeType>(sizeof(ReadWritePortal)) *
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numComponents,
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vtkm::CopyFlag::Off,
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token);
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// Save a reference of the portal in our metadata.
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// Note that the buffer we create is going to hang around until the ArrayHandle gets
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// destroyed. The buffers are small and should not be a problem unless you create a
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// lot of portals.
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buffers[0].GetMetaData<detail::RecombineVecMetaData>().PortalBuffers.push_back(portalBuffer);
|
|
|
|
// Get the control-side memory and fill it with the execution-side portals
|
|
ReadWritePortal* portals =
|
|
reinterpret_cast<ReadWritePortal*>(portalBuffer.WritePointerHost(token));
|
|
for (vtkm::IdComponent cIndex = 0; cIndex < numComponents; ++cIndex)
|
|
{
|
|
portals[cIndex] = ReadWritePortal(
|
|
SourceStorage::CreateReadPortal(BuffersForComponent(buffers, cIndex), device, token));
|
|
}
|
|
|
|
// Now get the execution-side memory (portals will be copied as necessary) and create
|
|
// the portal for the appropriate device
|
|
return ReadPortalType(
|
|
reinterpret_cast<const ReadWritePortal*>(portalBuffer.ReadPointerDevice(device, token)),
|
|
numComponents);
|
|
}
|
|
|
|
VTKM_CONT static WritePortalType CreateWritePortal(vtkm::cont::internal::Buffer* buffers,
|
|
vtkm::cont::DeviceAdapterId device,
|
|
vtkm::cont::Token& token)
|
|
{
|
|
vtkm::IdComponent numComponents = NumberOfComponents(buffers);
|
|
|
|
// The array portal needs a runtime-allocated array of portals for each component.
|
|
// We use the vtkm::cont::internal::Buffer object to allow us to allocate memory on the
|
|
// device and copy data there.
|
|
vtkm::cont::internal::Buffer portalBuffer;
|
|
portalBuffer.SetNumberOfBytes(static_cast<vtkm::BufferSizeType>(sizeof(ReadWritePortal)) *
|
|
numComponents,
|
|
vtkm::CopyFlag::Off,
|
|
token);
|
|
|
|
// Save a reference of the portal in our metadata.
|
|
// Note that the buffer we create is going to hang around until the ArrayHandle gets
|
|
// destroyed. The buffers are small and should not be a problem unless you create a
|
|
// lot of portals.
|
|
buffers[0].GetMetaData<detail::RecombineVecMetaData>().PortalBuffers.push_back(portalBuffer);
|
|
|
|
// Get the control-side memory and fill it with the execution-side portals
|
|
ReadWritePortal* portals =
|
|
reinterpret_cast<ReadWritePortal*>(portalBuffer.WritePointerHost(token));
|
|
for (vtkm::IdComponent cIndex = 0; cIndex < numComponents; ++cIndex)
|
|
{
|
|
portals[cIndex] = ReadWritePortal(
|
|
SourceStorage::CreateWritePortal(BuffersForComponent(buffers, cIndex), device, token));
|
|
}
|
|
|
|
// Now get the execution-side memory (portals will be copied as necessary) and create
|
|
// the portal for the appropriate device
|
|
return WritePortalType(
|
|
reinterpret_cast<const ReadWritePortal*>(portalBuffer.ReadPointerDevice(device, token)),
|
|
numComponents);
|
|
}
|
|
|
|
VTKM_CONT static ArrayType ArrayForComponent(const vtkm::cont::internal::Buffer* buffers,
|
|
vtkm::IdComponent componentIndex)
|
|
{
|
|
return ArrayType(BuffersForComponent(buffers, componentIndex));
|
|
}
|
|
|
|
VTKM_CONT static void AppendComponent(vtkm::cont::internal::Buffer* buffers,
|
|
const ArrayType& array)
|
|
{
|
|
std::vector<vtkm::cont::internal::Buffer> arrayBuffers(
|
|
array.GetBuffers(), array.GetBuffers() + SourceStorage::GetNumberOfBuffers());
|
|
buffers[0].GetMetaData<detail::RecombineVecMetaData>().ArrayBuffers.push_back(
|
|
std::move(arrayBuffers));
|
|
}
|
|
};
|
|
|
|
} // namespace internal
|
|
|
|
/// \brief A grouping of `ArrayHandleStride`s into an `ArrayHandle` of `Vec`s.
|
|
///
|
|
/// The main intention of `ArrayHandleStride` is to pull out a component of an
|
|
/// `ArrayHandle` without knowing there `ArrayHandle`'s storage or `Vec` shape.
|
|
/// However, usually you want to do an operation on all the components together.
|
|
/// `ArrayHandleRecombineVec` implements the functionality to easily take a
|
|
/// group of extracted components and treat them as a single `ArrayHandle` of
|
|
/// `Vec` values.
|
|
///
|
|
/// Note that caution should be used with `ArrayHandleRecombineVec` because the
|
|
/// size of the `Vec` values is not known at compile time. Thus, the value
|
|
/// type of this array is forced to a `VecVariable`, which can cause surprises
|
|
/// if treated as a `Vec`. In particular, the static `NUM_COMPONENTS` expression
|
|
/// does not exist.
|
|
///
|
|
template <typename ComponentType>
|
|
class ArrayHandleRecombineVec
|
|
: public vtkm::cont::ArrayHandle<internal::detail::RecombinedValueType<ComponentType>,
|
|
vtkm::cont::internal::StorageTagRecombineVec>
|
|
{
|
|
public:
|
|
VTKM_ARRAY_HANDLE_SUBCLASS(
|
|
ArrayHandleRecombineVec,
|
|
(ArrayHandleRecombineVec<ComponentType>),
|
|
(vtkm::cont::ArrayHandle<internal::detail::RecombinedValueType<ComponentType>,
|
|
vtkm::cont::internal::StorageTagRecombineVec>));
|
|
|
|
private:
|
|
using StorageType = vtkm::cont::internal::Storage<ValueType, StorageTag>;
|
|
|
|
public:
|
|
vtkm::IdComponent GetNumberOfComponents() const
|
|
{
|
|
return StorageType::NumberOfComponents(this->GetBuffers());
|
|
}
|
|
|
|
vtkm::cont::ArrayHandleStride<ComponentType> GetComponentArray(
|
|
vtkm::IdComponent componentIndex) const
|
|
{
|
|
return StorageType::ArrayForComponent(this->GetBuffers(), componentIndex);
|
|
}
|
|
|
|
void AppendComponentArray(
|
|
const vtkm::cont::ArrayHandle<ComponentType, vtkm::cont::StorageTagStride>& array)
|
|
{
|
|
StorageType::AppendComponent(this->GetBuffers(), array);
|
|
}
|
|
};
|
|
|
|
namespace internal
|
|
{
|
|
|
|
template <>
|
|
struct ArrayExtractComponentImpl<vtkm::cont::internal::StorageTagRecombineVec>
|
|
{
|
|
template <typename RecombineVec>
|
|
vtkm::cont::ArrayHandleStride<
|
|
typename vtkm::VecFlat<typename RecombineVec::ComponentType>::ComponentType>
|
|
operator()(
|
|
const vtkm::cont::ArrayHandle<RecombineVec, vtkm::cont::internal::StorageTagRecombineVec>& src,
|
|
vtkm::IdComponent componentIndex,
|
|
vtkm::CopyFlag allowCopy) const
|
|
{
|
|
using ComponentType = typename RecombineVec::ComponentType;
|
|
vtkm::cont::ArrayHandleRecombineVec<ComponentType> array(src);
|
|
constexpr vtkm::IdComponent subComponents = vtkm::VecFlat<ComponentType>::NUM_COMPONENTS;
|
|
return vtkm::cont::ArrayExtractComponent(
|
|
array.GetComponentArray(componentIndex / subComponents),
|
|
componentIndex % subComponents,
|
|
allowCopy);
|
|
}
|
|
};
|
|
|
|
} // namespace internal
|
|
|
|
}
|
|
} // namespace vtkm::cont
|
|
|
|
//=============================================================================
|
|
// Specializations of worklet arguments using ArrayHandleGropuVecVariable
|
|
#include <vtkm/exec/arg/FetchTagArrayDirectOutArrayHandleRecombineVec.h>
|
|
|
|
#endif //vtk_m_cont_ArrayHandleRecombineVec_h
|