vtkSOADataArrayTemplate.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkSOADataArrayTemplate_h
#define vtkSOADataArrayTemplate_h
 
#include "vtkBuffer.h"
#include "vtkCommonCoreModule.h" // For export macro
#include "vtkCompiler.h"         // for VTK_USE_EXTERN_TEMPLATE
#include "vtkGenericDataArray.h"
 
// The export macro below makes no sense, but is necessary for older compilers
// when we export instantiations of this class from vtkCommonCore.
VTK_ABI_NAMESPACE_BEGIN
template <class ValueTypeT>
class VTKCOMMONCORE_EXPORT vtkSOADataArrayTemplate
  : public vtkGenericDataArray<vtkSOADataArrayTemplate<ValueTypeT>, ValueTypeT>
{
  typedef vtkGenericDataArray<vtkSOADataArrayTemplate<ValueTypeT>, ValueTypeT> GenericDataArrayType;
 
public:
  typedef vtkSOADataArrayTemplate<ValueTypeT> SelfType;
  vtkTemplateTypeMacro(SelfType, GenericDataArrayType);
  typedef typename Superclass::ValueType ValueType;
 
  enum DeleteMethod
  {
    VTK_DATA_ARRAY_FREE = vtkAbstractArray::VTK_DATA_ARRAY_FREE,
    VTK_DATA_ARRAY_DELETE = vtkAbstractArray::VTK_DATA_ARRAY_DELETE,
    VTK_DATA_ARRAY_ALIGNED_FREE = vtkAbstractArray::VTK_DATA_ARRAY_ALIGNED_FREE,
    VTK_DATA_ARRAY_USER_DEFINED = vtkAbstractArray::VTK_DATA_ARRAY_USER_DEFINED
  };
 
  static vtkSOADataArrayTemplate* New();
 
 
  inline ValueType GetValue(vtkIdType valueIdx) const
  {
    vtkIdType tupleIdx;
    int comp;
    this->GetTupleIndexFromValueIndex(valueIdx, tupleIdx, comp);
    return this->GetTypedComponent(tupleIdx, comp);
  }
 
 
  inline void SetValue(vtkIdType valueIdx, ValueType value)
  {
    vtkIdType tupleIdx;
    int comp;
    this->GetTupleIndexFromValueIndex(valueIdx, tupleIdx, comp);
    this->SetTypedComponent(tupleIdx, comp, value);
  }
 
  inline void GetTypedTuple(vtkIdType tupleIdx, ValueType* tuple) const
  {
    if (this->StorageType == StorageTypeEnum::SOA)
    {
      for (size_t cc = 0; cc < this->Data.size(); cc++)
      {
        tuple[cc] = this->Data[cc]->GetBuffer()[tupleIdx];
      }
    }
    else
    {
      ValueType* buffer = this->AoSData->GetBuffer();
      std::copy(buffer + tupleIdx * this->GetNumberOfComponents(),
        buffer + (tupleIdx + 1) * this->GetNumberOfComponents(), tuple);
    }
  }
 
  inline void SetTypedTuple(vtkIdType tupleIdx, const ValueType* tuple)
  {
    if (this->StorageType == StorageTypeEnum::SOA)
    {
      for (size_t cc = 0; cc < this->Data.size(); ++cc)
      {
        this->Data[cc]->GetBuffer()[tupleIdx] = tuple[cc];
      }
    }
    else
    {
      ValueType* buffer = this->AoSData->GetBuffer();
      std::copy(tuple, tuple + this->GetNumberOfComponents(),
        buffer + tupleIdx * this->GetNumberOfComponents());
    }
  }
 
  inline ValueType GetTypedComponent(vtkIdType tupleIdx, int comp) const
  {
    if (this->StorageType == StorageTypeEnum::SOA)
    {
      return this->Data[comp]->GetBuffer()[tupleIdx];
    }
    return this->AoSData->GetBuffer()[tupleIdx * this->GetNumberOfComponents() + comp];
  }
 
  inline void SetTypedComponent(vtkIdType tupleIdx, int comp, ValueType value)
  {
    if (this->StorageType == StorageTypeEnum::SOA)
    {
      this->Data[comp]->GetBuffer()[tupleIdx] = value;
    }
    else
    {
      this->AoSData->GetBuffer()[tupleIdx * this->GetNumberOfComponents() + comp] = value;
    }
  }
 
  void FillTypedComponent(int compIdx, ValueType value) override;
 
  void SetArray(int comp, VTK_ZEROCOPY ValueType* array, vtkIdType size, bool updateMaxId = false,
    bool save = false, int deleteMethod = VTK_DATA_ARRAY_FREE);
 
  void SetArrayFreeFunction(void (*callback)(void*)) override;
 
  void SetArrayFreeFunction(int comp, void (*callback)(void*));
 
  ValueType* GetComponentArrayPointer(int comp);
 
  void* GetVoidPointer(vtkIdType valueIdx) override;
 
  void ExportToVoidPointer(void* ptr) override;
 
#ifndef __VTK_WRAP__
 
  static vtkSOADataArrayTemplate<ValueType>* FastDownCast(vtkAbstractArray* source);
#endif
 
  int GetArrayType() const override { return vtkAbstractArray::SoADataArrayTemplate; }
  VTK_NEWINSTANCE vtkArrayIterator* NewIterator() override;
  void SetNumberOfComponents(int numComps) override;
  void ShallowCopy(vtkDataArray* other) override;
 
  // Reimplemented for efficiency:
  void InsertTuples(
    vtkIdType dstStart, vtkIdType n, vtkIdType srcStart, vtkAbstractArray* source) override;
  // MSVC doesn't like 'using' here (error C2487). Just forward instead:
  // using Superclass::InsertTuples;
  void InsertTuples(vtkIdList* dstIds, vtkIdList* srcIds, vtkAbstractArray* source) override
  {
    this->Superclass::InsertTuples(dstIds, srcIds, source);
  }
  void InsertTuplesStartingAt(
    vtkIdType dstStart, vtkIdList* srcIds, vtkAbstractArray* source) override
  {
    this->Superclass::InsertTuplesStartingAt(dstStart, srcIds, source);
  }
 
#ifndef __VTK_WRAP__
  // helper method for vtkDataArray.cxx DeepCopyWorker () operator
  void CopyData(vtkSOADataArrayTemplate<ValueType>* src);
#endif
 
protected:
  vtkSOADataArrayTemplate();
  ~vtkSOADataArrayTemplate() override;
 
  bool AllocateTuples(vtkIdType numTuples);
 
  bool ReallocateTuples(vtkIdType numTuples);
 
  std::vector<vtkBuffer<ValueType>*> Data;
  vtkBuffer<ValueType>* AoSData;
 
  enum StorageTypeEnum
  {
    AOS,
    SOA
  };
  StorageTypeEnum StorageType;
 
  void ClearSOAData();
 
private:
  vtkSOADataArrayTemplate(const vtkSOADataArrayTemplate&) = delete;
  void operator=(const vtkSOADataArrayTemplate&) = delete;
 
  inline void GetTupleIndexFromValueIndex(vtkIdType valueIdx, vtkIdType& tupleIdx, int& comp) const
  {
    tupleIdx = valueIdx / this->NumberOfComponents;
    comp = valueIdx % this->NumberOfComponents;
  }
 
  friend class vtkGenericDataArray<vtkSOADataArrayTemplate<ValueTypeT>, ValueTypeT>;
};
 
// Declare vtkArrayDownCast implementations for SoA containers:
vtkArrayDownCast_TemplateFastCastMacro(vtkSOADataArrayTemplate);
 
VTK_ABI_NAMESPACE_END
#endif // header guard
 
// This portion must be OUTSIDE the include blockers. This is used to tell
// libraries other than vtkCommonCore that instantiations of
// vtkSOADataArrayTemplate can be found externally. This prevents each library
// from instantiating these on their own.
#ifdef VTK_SOA_DATA_ARRAY_TEMPLATE_INSTANTIATING
#define VTK_SOA_DATA_ARRAY_TEMPLATE_INSTANTIATE(T)                                                 \
  namespace vtkDataArrayPrivate                                                                    \
  {                                                                                                \
  VTK_ABI_NAMESPACE_BEGIN                                                                          \
  VTK_INSTANTIATE_VALUERANGE_ARRAYTYPE(vtkSOADataArrayTemplate<T>, double);                        \
  VTK_ABI_NAMESPACE_END                                                                            \
  }                                                                                                \
  VTK_ABI_NAMESPACE_BEGIN                                                                          \
  template class VTKCOMMONCORE_EXPORT vtkSOADataArrayTemplate<T>;                                  \
  VTK_ABI_NAMESPACE_END
 
#elif defined(VTK_USE_EXTERN_TEMPLATE)
#ifndef VTK_SOA_DATA_ARRAY_TEMPLATE_EXTERN
#define VTK_SOA_DATA_ARRAY_TEMPLATE_EXTERN
#ifdef _MSC_VER
#pragma warning(push)
// The following is needed when the vtkSOADataArrayTemplate is declared
// dllexport and is used from another class in vtkCommonCore
#pragma warning(disable : 4910) // extern and dllexport incompatible
#endif
VTK_ABI_NAMESPACE_BEGIN
vtkExternTemplateMacro(extern template class VTKCOMMONCORE_EXPORT vtkSOADataArrayTemplate);
#ifdef _MSC_VER
#pragma warning(pop)
#endif
VTK_ABI_NAMESPACE_END
#endif // VTK_SOA_DATA_ARRAY_TEMPLATE_EXTERN
 
// The following clause is only for MSVC 2008 and 2010
#elif defined(_MSC_VER) && !defined(VTK_BUILD_SHARED_LIBS)
#pragma warning(push)
 
// C4091: 'extern ' : ignored on left of 'int' when no variable is declared
#pragma warning(disable : 4091)
 
// Compiler-specific extension warning.
#pragma warning(disable : 4231)
 
// We need to disable warning 4910 and do an extern dllexport
// anyway.  When deriving new arrays from an
// instantiation of this template the compiler does an explicit
// instantiation of the base class.  From outside the vtkCommon
// library we block this using an extern dllimport instantiation.
// For classes inside vtkCommon we should be able to just do an
// extern instantiation, but VS 2008 complains about missing
// definitions.  We cannot do an extern dllimport inside vtkCommon
// since the symbols are local to the dll.  An extern dllexport
// seems to be the only way to convince VS 2008 to do the right
// thing, so we just disable the warning.
#pragma warning(disable : 4910) // extern and dllexport incompatible
 
// Use an "extern explicit instantiation" to give the class a DLL
// interface.  This is a compiler-specific extension.
VTK_ABI_NAMESPACE_BEGIN
vtkInstantiateTemplateMacro(extern template class VTKCOMMONCORE_EXPORT vtkSOADataArrayTemplate);
 
#pragma warning(pop)
 
VTK_ABI_NAMESPACE_END
#endif
 
// VTK-HeaderTest-Exclude: vtkSOADataArrayTemplate.h