vtkSOADataArrayTemplate.h

Go to the documentation of this file.

/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkSOADataArrayTemplate.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef vtkSOADataArrayTemplate_h
#define vtkSOADataArrayTemplate_h

#include "vtkCommonCoreModule.h" // For export macro
#include "vtkGenericDataArray.h"
#include "vtkBuffer.h"

// The export macro below makes no sense, but is necessary for older compilers
// when we export instantiations of this class from vtkCommonCore.
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=vtkBuffer<ValueType>::VTK_DATA_ARRAY_FREE,
    VTK_DATA_ARRAY_DELETE=vtkBuffer<ValueType>::VTK_DATA_ARRAY_DELETE
  };

  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
  {
    for (size_t cc=0; cc < this->Data.size(); cc++)
    {
      tuple[cc] = this->Data[cc]->GetBuffer()[tupleIdx];
    }
  }

  inline void SetTypedTuple(vtkIdType tupleIdx, const ValueType* tuple)
  {
    for (size_t cc=0; cc < this->Data.size(); ++cc)
    {
      this->Data[cc]->GetBuffer()[tupleIdx] = tuple[cc];
    }
  }

  inline ValueType GetTypedComponent(vtkIdType tupleIdx, int comp) const
  {
    return this->Data[comp]->GetBuffer()[tupleIdx];
  }

  inline void SetTypedComponent(vtkIdType tupleIdx, int comp, ValueType value)
  {
    this->Data[comp]->GetBuffer()[tupleIdx] = value;
  }

  void SetArray(int comp, ValueType* array, vtkIdType size,
                bool updateMaxId = false, bool save=false,
                int deleteMethod=VTK_DATA_ARRAY_FREE);

  ValueType* GetComponentArrayPointer(int comp);

  void *GetVoidPointer(vtkIdType valueIdx) VTK_OVERRIDE;

  void ExportToVoidPointer(void *ptr) VTK_OVERRIDE;


  static vtkSOADataArrayTemplate<ValueType>*
  FastDownCast(vtkAbstractArray *source)
  {
    if (source)
    {
      switch (source->GetArrayType())
      {
        case vtkAbstractArray::SoADataArrayTemplate:
          if (vtkDataTypesCompare(source->GetDataType(),
                                  vtkTypeTraits<ValueType>::VTK_TYPE_ID))
          {
            return static_cast<vtkSOADataArrayTemplate<ValueType>*>(source);
          }
          break;
      }
    }
    return NULL;
  }

  int GetArrayType() VTK_OVERRIDE { return vtkAbstractArray::SoADataArrayTemplate; }
  VTK_NEWINSTANCE vtkArrayIterator *NewIterator() VTK_OVERRIDE;
  void SetNumberOfComponents(int numComps) VTK_OVERRIDE;
  void ShallowCopy(vtkDataArray *other) VTK_OVERRIDE;

  // Reimplemented for efficiency:
  void InsertTuples(vtkIdType dstStart, vtkIdType n, vtkIdType srcStart,
                    vtkAbstractArray* source) VTK_OVERRIDE;
  // MSVC doesn't like 'using' here (error C2487). Just forward instead:
  // using Superclass::InsertTuples;
  void InsertTuples(vtkIdList *dstIds, vtkIdList *srcIds,
                    vtkAbstractArray *source) VTK_OVERRIDE
  { this->Superclass::InsertTuples(dstIds, srcIds, source); }

protected:
  vtkSOADataArrayTemplate();
  ~vtkSOADataArrayTemplate() VTK_OVERRIDE;

  bool AllocateTuples(vtkIdType numTuples);

  bool ReallocateTuples(vtkIdType numTuples);

  std::vector<vtkBuffer<ValueType>*> Data;
  vtkBuffer<ValueType> *AoSCopy;

  double NumberOfComponentsReciprocal;

private:
  vtkSOADataArrayTemplate(const vtkSOADataArrayTemplate&) VTK_DELETE_FUNCTION;
  void operator=(const vtkSOADataArrayTemplate&) VTK_DELETE_FUNCTION;

  inline void GetTupleIndexFromValueIndex(vtkIdType valueIdx,
                                          vtkIdType& tupleIdx, int& comp) const
  {
    tupleIdx = static_cast<vtkIdType>(valueIdx *
                                      this->NumberOfComponentsReciprocal);
    comp = valueIdx - (tupleIdx * this->NumberOfComponents);
  }

  friend class vtkGenericDataArray<vtkSOADataArrayTemplate<ValueTypeT>,
                                   ValueTypeT>;
};

// Declare vtkArrayDownCast implementations for SoA containers:
vtkArrayDownCast_TemplateFastCastMacro(vtkSOADataArrayTemplate)

#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) \
  template class VTKCOMMONCORE_EXPORT vtkSOADataArrayTemplate< T >
#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
vtkExternTemplateMacro(
  extern template class VTKCOMMONCORE_EXPORT vtkSOADataArrayTemplate)
#ifdef _MSC_VER
#pragma warning (pop)
#endif
#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.
vtkInstantiateTemplateMacro(
  extern template class VTKCOMMONCORE_EXPORT vtkSOADataArrayTemplate)

#pragma warning (pop)

#endif

// VTK-HeaderTest-Exclude: vtkSOADataArrayTemplate.h