2017-07-28 18:55:37 +00:00
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//=============================================================================
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//
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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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2017-09-20 21:33:44 +00:00
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// Copyright 2017 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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2017-07-28 18:55:37 +00:00
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// Copyright 2017 UT-Battelle, LLC.
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// Copyright 2017 Los Alamos National Security.
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//
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2017-09-20 21:33:44 +00:00
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// Under the terms of Contract DE-NA0003525 with NTESS,
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2017-07-28 18:55:37 +00:00
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// the U.S. Government retains certain rights in this software.
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//
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//=============================================================================
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#ifndef vtk_m_cont_ArrayHandleSwizzle_h
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#define vtk_m_cont_ArrayHandleSwizzle_h
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#include <vtkm/VecTraits.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <array>
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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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// If TestValue appears more than once in ComponentMap, IsUnique will be false,
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// but true if TestValue is unique.
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template <vtkm::IdComponent TestValue, vtkm::IdComponent... ComponentMap>
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struct ComponentIsUnique;
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// Terminal case:
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template <vtkm::IdComponent TestValue, vtkm::IdComponent Head>
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struct ComponentIsUnique<TestValue, Head>
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{
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static const bool IsUnique = TestValue != Head;
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};
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// Recursive case:
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template <vtkm::IdComponent TestValue, vtkm::IdComponent Head, vtkm::IdComponent... Tail>
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struct ComponentIsUnique<TestValue, Head, Tail...>
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{
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using Next = ComponentIsUnique<TestValue, Tail...>;
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static const bool IsUnique = TestValue != Head && Next::IsUnique;
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};
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// Validate the component map.
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// All elements must be (1) unique, (2) >= 0, and (3) < InputSize
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template <vtkm::IdComponent InputSize, vtkm::IdComponent... ComponentMap>
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struct ValidateComponentMap;
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// Terminal impl:
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template <vtkm::IdComponent InputSize, vtkm::IdComponent Head>
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struct ValidateComponentMap<InputSize, Head>
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{
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static constexpr bool Valid = Head >= 0 && Head < InputSize;
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};
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// Recursive impl:
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template <vtkm::IdComponent InputSize, vtkm::IdComponent Head, vtkm::IdComponent... Tail>
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struct ValidateComponentMap<InputSize, Head, Tail...>
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{
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using Next = ValidateComponentMap<InputSize, Tail...>;
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static constexpr bool IsUnique = ComponentIsUnique<Head, Tail...>::IsUnique;
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static constexpr bool Valid = Head >= 0 && Head < InputSize && IsUnique && Next::Valid;
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};
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} // end namespace internal
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/// This class collects metadata for an ArrayHandleSwizzle.
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template <typename InputValueType, vtkm::IdComponent... ComponentMap>
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struct ArrayHandleSwizzleTraits
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{
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/// The number of elements in the ComponentMap.
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static constexpr vtkm::IdComponent COUNT =
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static_cast<vtkm::IdComponent>(sizeof...(ComponentMap));
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VTKM_STATIC_ASSERT_MSG(COUNT > 0, "Invalid ComponentMap: Cannot swizzle zero components.");
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/// A std::array containing the ComponentMap for runtime querying.
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using RuntimeComponentMapType = std::array<vtkm::IdComponent, COUNT>;
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static constexpr RuntimeComponentMapType GenerateRuntimeComponentMap()
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{
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return RuntimeComponentMapType{ { ComponentMap... } };
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}
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/// The ValueType of the ArrayHandleSwizzle's internal ArrayHandle.
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using InputType = InputValueType;
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/// The VecTraits for InputType.
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using InputTraits = VecTraits<InputType>;
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using Validator = internal::ValidateComponentMap<InputTraits::NUM_COMPONENTS, ComponentMap...>;
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VTKM_STATIC_ASSERT_MSG(Validator::Valid,
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"Invalid ComponentMap: Ids in ComponentMap must be unique, positive, and "
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"less than the number of input components.");
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/// The ComponentType of the ArrayHandleSwizzle.
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using ComponentType = typename InputTraits::ComponentType;
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/// The ValueType of the ArrayHandleSwizzle.
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using OutputType = vtkm::Vec<ComponentType, COUNT>;
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// The VecTraits for OutputType.
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using OutputTraits = VecTraits<OutputType>;
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/// If true, we use all components in the input vector. If false, we'll need
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/// to make sure to preserve existing values on write.
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static constexpr bool ALL_COMPS_USED = InputTraits::NUM_COMPONENTS == COUNT;
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private:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent... Map>
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struct GetImpl;
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// Terminal case:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent Head>
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struct GetImpl<OutputIndex, Head>
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{
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constexpr vtkm::IdComponent operator()() const { return OutputIndex == 0 ? Head : -1; }
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};
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// Recursive case:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent Head, vtkm::IdComponent... Tail>
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struct GetImpl<OutputIndex, Head, Tail...>
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{
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using Next = GetImpl<OutputIndex - 1, Tail...>;
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constexpr vtkm::IdComponent operator()() const { return OutputIndex == 0 ? Head : Next()(); }
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};
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public:
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/// Get the component from ComponentMap at the specified index as a
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/// compile-time constant:
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template <vtkm::IdComponent OutputIndex>
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static constexpr vtkm::IdComponent Get()
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{
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return GetImpl<OutputIndex, ComponentMap...>()();
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}
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private:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent... Map>
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struct SwizzleImpl;
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// Terminal case:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent Head>
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struct SwizzleImpl<OutputIndex, Head>
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{
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static constexpr vtkm::IdComponent InputIndex = Head;
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void operator()(const InputType& in, OutputType& out) const
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{
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OutputTraits::SetComponent(out, OutputIndex, InputTraits::GetComponent(in, InputIndex));
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}
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};
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// Recursive case:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent Head, vtkm::IdComponent... Tail>
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struct SwizzleImpl<OutputIndex, Head, Tail...>
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{
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using Next = SwizzleImpl<OutputIndex + 1, Tail...>;
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static constexpr vtkm::IdComponent InputIndex = Head;
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void operator()(const InputType& in, OutputType& out) const
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{
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OutputTraits::SetComponent(out, OutputIndex, InputTraits::GetComponent(in, InputIndex));
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Next()(in, out);
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}
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};
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public:
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/// Swizzle the input type into the output type.
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static void Swizzle(const InputType& in, OutputType& out)
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{
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SwizzleImpl<0, ComponentMap...>()(in, out);
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}
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// UnSwizzle output type --> input type
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private:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent... Map>
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struct UnSwizzleImpl;
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// Terminal case:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent Head>
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struct UnSwizzleImpl<OutputIndex, Head>
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{
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static constexpr vtkm::IdComponent InputIndex = Head;
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void operator()(const OutputType& out, InputType& in) const
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{
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InputTraits::SetComponent(in, InputIndex, OutputTraits::GetComponent(out, OutputIndex));
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}
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};
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// Recursive case:
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template <vtkm::IdComponent OutputIndex, vtkm::IdComponent Head, vtkm::IdComponent... Tail>
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struct UnSwizzleImpl<OutputIndex, Head, Tail...>
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{
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using Next = UnSwizzleImpl<OutputIndex + 1, Tail...>;
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static constexpr vtkm::IdComponent InputIndex = Head;
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void operator()(const OutputType& out, InputType& in) const
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{
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InputTraits::SetComponent(in, InputIndex, OutputTraits::GetComponent(out, OutputIndex));
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Next()(out, in);
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}
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};
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// Entry point:
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public:
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/// Unswizzle the output type back into the input type.
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/// @warning If the entire vector is not used, there may be uninitialized
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/// data in the resulting InputType vector. See ALL_COMPS_USED flag.
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static void UnSwizzle(const OutputType& out, InputType& in)
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{
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UnSwizzleImpl<0, ComponentMap...>()(out, in);
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}
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};
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namespace internal
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{
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template <typename PortalType, vtkm::IdComponent... ComponentMap>
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class VTKM_ALWAYS_EXPORT ArrayPortalSwizzle
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{
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using Traits = ArrayHandleSwizzleTraits<typename PortalType::ValueType, ComponentMap...>;
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public:
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using ValueType = typename Traits::OutputType;
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VTKM_EXEC_CONT
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ArrayPortalSwizzle()
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: Portal()
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{
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}
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VTKM_EXEC_CONT
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ArrayPortalSwizzle(const PortalType& portal)
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: Portal(portal)
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{
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}
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// Copy constructor
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VTKM_EXEC_CONT ArrayPortalSwizzle(const ArrayPortalSwizzle<PortalType, ComponentMap...>& src)
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: Portal(src.GetPortal())
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{
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}
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VTKM_EXEC_CONT
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vtkm::Id GetNumberOfValues() const { return this->Portal.GetNumberOfValues(); }
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VTKM_EXEC_CONT
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ValueType Get(vtkm::Id index) const
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{
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typename Traits::OutputType result;
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Traits::Swizzle(this->Portal.Get(index), result);
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return result;
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}
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VTKM_EXEC_CONT
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void Set(vtkm::Id index, const ValueType& value) const
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{
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SetImpl<!Traits::ALL_COMPS_USED>(this->Portal)(index, value);
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}
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private:
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// If NeedsRead is true, we need to initialize the InputType vector we write
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// with the current values at @a index to avoid overwriting unused components.
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template <bool NeedsRead>
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struct SetImpl
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{
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const PortalType& Portal;
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SetImpl(const PortalType& portal)
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: Portal(portal)
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{
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}
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void operator()(const vtkm::Id& index, const ValueType& value)
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{
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typename Traits::InputType in;
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if (NeedsRead)
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{
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in = this->Portal.Get(index);
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}
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Traits::UnSwizzle(value, in);
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this->Portal.Set(index, in);
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}
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};
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public:
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VTKM_EXEC_CONT
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const PortalType& GetPortal() const { return this->Portal; }
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private:
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PortalType Portal;
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}; // class ArrayPortalSwizzle
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} // namespace internal
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template <typename ArrayHandleType, vtkm::IdComponent... ComponentMap>
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class StorageTagSwizzle
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{
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};
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namespace internal
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{
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template <typename ArrayHandleType, vtkm::IdComponent... ComponentMap>
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class Storage<typename ArrayHandleSwizzleTraits<typename ArrayHandleType::ValueType,
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ComponentMap...>::OutputType,
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StorageTagSwizzle<ArrayHandleType, ComponentMap...>>
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{
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public:
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using PortalType = ArrayPortalSwizzle<typename ArrayHandleType::PortalControl, ComponentMap...>;
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using PortalConstType =
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ArrayPortalSwizzle<typename ArrayHandleType::PortalConstControl, ComponentMap...>;
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using ValueType = typename PortalType::ValueType;
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VTKM_CONT
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Storage()
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: Valid(false)
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{
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}
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VTKM_CONT
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Storage(const ArrayHandleType& array)
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: Array(array)
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, Valid(true)
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{
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}
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VTKM_CONT
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PortalConstType GetPortalConst() const
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{
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VTKM_ASSERT(this->Valid);
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return PortalConstType(this->Array.GetPortalConstControl());
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}
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VTKM_CONT
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PortalType GetPortal()
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{
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VTKM_ASSERT(this->Valid);
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return PortalType(this->Array.GetPortalControl());
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}
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VTKM_CONT
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vtkm::Id GetNumberOfValues() const
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{
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VTKM_ASSERT(this->Valid);
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return this->Array.GetNumberOfValues();
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}
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VTKM_CONT
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void Allocate(vtkm::Id numberOfValues)
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|
{
|
|
|
|
VTKM_ASSERT(this->Valid);
|
|
|
|
this->Array.Allocate(numberOfValues);
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
void Shrink(vtkm::Id numberOfValues)
|
|
|
|
{
|
|
|
|
VTKM_ASSERT(this->Valid);
|
|
|
|
this->Array.Shrink(numberOfValues);
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
void ReleaseResources()
|
|
|
|
{
|
|
|
|
VTKM_ASSERT(this->Valid);
|
|
|
|
this->Array.ReleaseResources();
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
const ArrayHandleType& GetArray() const
|
|
|
|
{
|
|
|
|
VTKM_ASSERT(this->Valid);
|
|
|
|
return this->Array;
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
ArrayHandleType Array;
|
|
|
|
bool Valid;
|
|
|
|
}; // class Storage
|
|
|
|
|
|
|
|
template <typename ArrayHandleType, vtkm::IdComponent... ComponentMap, typename Device>
|
|
|
|
class ArrayTransfer<typename ArrayHandleSwizzleTraits<typename ArrayHandleType::ValueType,
|
|
|
|
ComponentMap...>::OutputType,
|
|
|
|
StorageTagSwizzle<ArrayHandleType, ComponentMap...>,
|
|
|
|
Device>
|
|
|
|
{
|
|
|
|
using ArrayExecutionTypes = typename ArrayHandleType::template ExecutionTypes<Device>;
|
|
|
|
using StorageTag = StorageTagSwizzle<ArrayHandleType, ComponentMap...>;
|
|
|
|
|
|
|
|
public:
|
|
|
|
using SwizzleTraits =
|
|
|
|
ArrayHandleSwizzleTraits<typename ArrayHandleType::ValueType, ComponentMap...>;
|
|
|
|
using ValueType = typename SwizzleTraits::OutputType;
|
|
|
|
|
|
|
|
private:
|
|
|
|
using StorageType = vtkm::cont::internal::Storage<ValueType, StorageTag>;
|
|
|
|
|
|
|
|
public:
|
|
|
|
using PortalControl = typename StorageType::PortalType;
|
|
|
|
using PortalConstControl = typename StorageType::PortalConstType;
|
|
|
|
|
|
|
|
using PortalExecution = ArrayPortalSwizzle<typename ArrayExecutionTypes::Portal, ComponentMap...>;
|
|
|
|
using PortalConstExecution =
|
|
|
|
ArrayPortalSwizzle<typename ArrayExecutionTypes::PortalConst, ComponentMap...>;
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
ArrayTransfer(StorageType* storage)
|
|
|
|
: Array(storage->GetArray())
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
vtkm::Id GetNumberOfValues() const { return this->Array.GetNumberOfValues(); }
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
PortalConstExecution PrepareForInput(bool vtkmNotUsed(updateData))
|
|
|
|
{
|
|
|
|
return PortalConstExecution(this->Array.PrepareForInput(Device()));
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
PortalExecution PrepareForInPlace(bool vtkmNotUsed(updateData))
|
|
|
|
{
|
|
|
|
return PortalExecution(this->Array.PrepareForInPlace(Device()));
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
PortalExecution PrepareForOutput(vtkm::Id numberOfValues)
|
|
|
|
{
|
|
|
|
return PortalExecution(this->Array.PrepareForOutput(numberOfValues, Device()));
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
void RetrieveOutputData(StorageType* vtkmNotUsed(storage)) const
|
|
|
|
{
|
|
|
|
// Implementation of this method should be unnecessary. The internal
|
|
|
|
// array handle should automatically retrieve the output data as
|
|
|
|
// necessary.
|
|
|
|
}
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
void Shrink(vtkm::Id numberOfValues) { this->Array.Shrink(numberOfValues); }
|
|
|
|
|
|
|
|
VTKM_CONT
|
|
|
|
void ReleaseResources() { this->Array.ReleaseResourcesExecution(); }
|
|
|
|
|
|
|
|
private:
|
|
|
|
ArrayHandleType Array;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} // namespace vtkm::cont::internal
|
|
|
|
|
|
|
|
namespace vtkm
|
|
|
|
{
|
|
|
|
namespace cont
|
|
|
|
{
|
|
|
|
|
|
|
|
/// \brief A fancy ArrayHandle that rearranges and/or removes components of an
|
|
|
|
/// ArrayHandle with a vtkm::Vec ValueType.
|
|
|
|
///
|
|
|
|
/// ArrayHandleSwizzle is a specialization of ArrayHandle. It takes an
|
|
|
|
/// input ArrayHandle with a vtkm::Vec ValueType and a compile-time component
|
|
|
|
/// map and uses this information to create a new array consisting of the
|
|
|
|
/// specified components of the input ArrayHandle in the specified order. So for
|
|
|
|
/// a given index i, ArrayHandleSwizzle looks up the i-th vtkm::Vec in
|
|
|
|
/// the index array and reads or writes to the specified components, leaving all
|
|
|
|
/// other components unmodified. This is done on the fly rather than creating a
|
|
|
|
/// copy of the array.
|
|
|
|
template <typename ArrayHandleType, vtkm::IdComponent... ComponentMap>
|
|
|
|
class ArrayHandleSwizzle : public vtkm::cont::ArrayHandle<
|
|
|
|
typename ArrayHandleSwizzleTraits<typename ArrayHandleType::ValueType,
|
|
|
|
ComponentMap...>::OutputType,
|
|
|
|
StorageTagSwizzle<ArrayHandleType, ComponentMap...>>
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
VTKM_ARRAY_HANDLE_SUBCLASS(
|
|
|
|
ArrayHandleSwizzle,
|
|
|
|
(ArrayHandleSwizzle<ArrayHandleType, ComponentMap...>),
|
|
|
|
(vtkm::cont::ArrayHandle<typename ArrayHandleSwizzleTraits<typename ArrayHandleType::ValueType,
|
|
|
|
ComponentMap...>::OutputType,
|
|
|
|
StorageTagSwizzle<ArrayHandleType, ComponentMap...>>));
|
|
|
|
|
|
|
|
using SwizzleTraits =
|
|
|
|
ArrayHandleSwizzleTraits<typename ArrayHandleType::ValueType, ComponentMap...>;
|
|
|
|
|
|
|
|
protected:
|
|
|
|
using StorageType = vtkm::cont::internal::Storage<ValueType, StorageTag>;
|
|
|
|
|
|
|
|
public:
|
|
|
|
VTKM_CONT
|
|
|
|
ArrayHandleSwizzle(const ArrayHandleType& array)
|
|
|
|
: Superclass(StorageType(array))
|
|
|
|
{
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
/// make_ArrayHandleSwizzle is convenience function to generate an
|
|
|
|
/// ArrayHandleSwizzle.
|
|
|
|
template <vtkm::IdComponent... ComponentMap, typename ArrayHandleType>
|
|
|
|
VTKM_CONT ArrayHandleSwizzle<ArrayHandleType, ComponentMap...> make_ArrayHandleSwizzle(
|
|
|
|
const ArrayHandleType& array)
|
|
|
|
{
|
|
|
|
return ArrayHandleSwizzle<ArrayHandleType, ComponentMap...>(array);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} // namespace vtkm::cont
|
|
|
|
|
|
|
|
#endif // vtk_m_cont_ArrayHandleSwizzle_h
|