mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 21:33:55 +00:00
4c524de625
Also fix condition where a `UnknownArrayHandle` destination does not have an underlying `ArrayHandle` set yet.
134 lines
4.0 KiB
C++
134 lines
4.0 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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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/DeviceAdapterList.h>
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#include <vtkm/cont/Invoker.h>
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#include <vtkm/worklet/WorkletMapField.h>
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namespace
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{
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// Use a worklet because device adapter copies often have an issue with casting the values from the
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// `ArrayHandleRecomineVec` that comes from `UnknownArrayHandle::CastAndCallWithExtractedArray`.
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struct CopyWorklet : vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn, FieldOut);
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using ExecutionSignature = void(_1, _2);
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using InputDomain = _1;
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template <typename InType, typename OutType>
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VTKM_EXEC void operator()(const InType& in, OutType& out) const
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{
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out = in;
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}
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};
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struct UnknownCopyOnDevice
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{
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bool Called = false;
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template <typename InArrayType, typename OutArrayType>
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void operator()(vtkm::cont::DeviceAdapterId device,
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const InArrayType& in,
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const OutArrayType& out)
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{
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if (!this->Called && ((device == vtkm::cont::DeviceAdapterTagAny{}) || (in.IsOnDevice(device))))
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{
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vtkm::cont::Invoker invoke(device);
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invoke(CopyWorklet{}, in, out);
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this->Called = true;
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}
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}
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};
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struct UnknownCopyFunctor2
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{
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template <typename OutArrayType, typename InArrayType>
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void operator()(const OutArrayType& out, const InArrayType& in) const
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{
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UnknownCopyOnDevice doCopy;
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// Try to copy on a device that the data are already on.
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vtkm::ListForEach(doCopy, VTKM_DEFAULT_DEVICE_ADAPTER_LIST{}, in, out);
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// If it was not on any device, call one more time with any adapter to copy wherever.
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doCopy(vtkm::cont::DeviceAdapterTagAny{}, in, out);
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}
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};
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struct UnknownCopyFunctor1
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{
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template <typename InArrayType>
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void operator()(const InArrayType& in, vtkm::cont::UnknownArrayHandle& out) const
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{
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out.Allocate(in.GetNumberOfValues());
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this->DoIt(in,
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out,
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typename std::is_same<vtkm::FloatDefault,
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typename InArrayType::ValueType::ComponentType>::type{});
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}
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template <typename InArrayType>
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void DoIt(const InArrayType& in, vtkm::cont::UnknownArrayHandle& out, std::false_type) const
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{
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// Source is not float.
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using BaseComponentType = typename InArrayType::ValueType::ComponentType;
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if (out.IsBaseComponentType<BaseComponentType>())
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{
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// Arrays have the same base component type. Copy directly.
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UnknownCopyFunctor2{}(out.ExtractArrayFromComponents<BaseComponentType>(), in);
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}
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else if (out.IsBaseComponentType<vtkm::FloatDefault>())
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{
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// Can copy anything to default float.
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UnknownCopyFunctor2{}(out.ExtractArrayFromComponents<vtkm::FloatDefault>(), in);
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}
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else
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{
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// Arrays have different base types. To reduce the number of template paths from nxn to 3n,
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// copy first to a temp array of default float.
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vtkm::cont::UnknownArrayHandle temp = out.NewInstanceFloatBasic();
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(*this)(in, temp);
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vtkm::cont::ArrayCopy(temp, out);
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}
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}
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template <typename InArrayType>
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void DoIt(const InArrayType& in, vtkm::cont::UnknownArrayHandle& out, std::true_type) const
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{
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// Source array is FloatDefault. That should be copiable to anything.
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out.CastAndCallWithExtractedArray(UnknownCopyFunctor2{}, in);
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}
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};
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} // anonymous namespace
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namespace vtkm
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{
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namespace cont
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{
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void ArrayCopy(const vtkm::cont::UnknownArrayHandle& source,
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vtkm::cont::UnknownArrayHandle& destination)
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{
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if (!destination.IsValid())
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{
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destination = source.NewInstanceBasic();
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}
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source.CastAndCallWithExtractedArray(UnknownCopyFunctor1{}, destination);
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}
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}
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} // namespace vtkm::cont
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