mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-16 17:22:55 +00:00
87 lines
2.3 KiB
C++
87 lines
2.3 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_FastVec_h
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#define vtk_m_exec_internal_FastVec_h
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#include <vtkm/Types.h>
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#include <vtkm/VecVariable.h>
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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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/// Use this class to convert Vecs of any type to an efficient stack based Vec
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/// type. The template parameters are the input Vec type and the maximum
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/// number of components it may have. Specializations exist to optimize
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/// the copy and stack usage away for already efficient types.
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/// This class is useful when several accesses will be performed on
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/// potentially inefficient Vec types such as VecFromPortalPermute.
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///
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template <typename VecType, vtkm::IdComponent MaxSize>
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class FastVec
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{
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public:
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using Type = vtkm::VecVariable<typename VecType::ComponentType, MaxSize>;
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explicit VTKM_EXEC FastVec(const VecType& vec)
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: Vec(vec)
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{
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}
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VTKM_EXEC const Type& Get() const { return this->Vec; }
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private:
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Type Vec;
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};
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template <typename ComponentType, vtkm::IdComponent NumComponents, vtkm::IdComponent MaxSize>
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class FastVec<vtkm::Vec<ComponentType, NumComponents>, MaxSize>
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{
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public:
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using Type = vtkm::Vec<ComponentType, NumComponents>;
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explicit VTKM_EXEC FastVec(const Type& vec)
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: Vec(vec)
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{
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VTKM_ASSERT(vec.GetNumberOfComponents() <= MaxSize);
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}
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VTKM_EXEC const Type& Get() const { return this->Vec; }
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private:
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const Type& Vec;
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};
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template <typename ComponentType, vtkm::IdComponent MaxSize1, vtkm::IdComponent MaxSize2>
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class FastVec<vtkm::VecVariable<ComponentType, MaxSize1>, MaxSize2>
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{
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public:
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using Type = vtkm::VecVariable<ComponentType, MaxSize1>;
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explicit VTKM_EXEC FastVec(const Type& vec)
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: Vec(vec)
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{
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VTKM_ASSERT(vec.GetNumberOfComponents() <= MaxSize2);
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}
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VTKM_EXEC const Type& Get() const { return this->Vec; }
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private:
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const Type& Vec;
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};
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}
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}
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} // vtkm::exec::internal
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#endif // vtk_m_exec_internal_FastVec_h
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