vtkScaledSOADataArrayTemplate.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkScaledSOADataArrayTemplate.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 vtkScaledSOADataArrayTemplate_h
#define vtkScaledSOADataArrayTemplate_h
 
#include "vtkBuffer.h"
#include "vtkBuild.h"            // For VTK_BUILD_SHARED_LIBS
#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.
template <class ValueTypeT>
class VTKCOMMONCORE_EXPORT vtkScaledSOADataArrayTemplate
  : public vtkGenericDataArray<vtkScaledSOADataArrayTemplate<ValueTypeT>, ValueTypeT>
{
  typedef vtkGenericDataArray<vtkScaledSOADataArrayTemplate<ValueTypeT>, ValueTypeT>
    GenericDataArrayType;
 
public:
  typedef vtkScaledSOADataArrayTemplate<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 vtkScaledSOADataArrayTemplate* New();
 
 
  void SetScale(ValueType scale)
  {
    if (scale != this->Scale)
    {
      if (scale == 0)
      {
        vtkErrorMacro("Cannot set Scale to 0");
      }
      else
      {
        this->Scale = scale;
        this->Modified();
      }
    }
  }
  ValueType GetScale() const { return this->Scale; }
 
 
  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] * this->Scale;
    }
  }
 
  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] / this->Scale;
    }
  }
 
  inline ValueType GetTypedComponent(vtkIdType tupleIdx, int comp) const
  {
    return this->Data[comp]->GetBuffer()[tupleIdx] * this->Scale;
  }
 
  inline void SetTypedComponent(vtkIdType tupleIdx, int comp, ValueType value)
  {
    this->Data[comp]->GetBuffer()[tupleIdx] = value / this->Scale;
  }
 
  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 vtkScaledSOADataArrayTemplate<ValueType>* FastDownCast(vtkAbstractArray* source)
  {
    if (source)
    {
      switch (source->GetArrayType())
      {
        case vtkAbstractArray::ScaleSoADataArrayTemplate:
          if (vtkDataTypesCompare(source->GetDataType(), vtkTypeTraits<ValueType>::VTK_TYPE_ID))
          {
            return static_cast<vtkScaledSOADataArrayTemplate<ValueType>*>(source);
          }
          break;
      }
    }
    return nullptr;
  }
#endif
 
  int GetArrayType() const override { return vtkAbstractArray::ScaleSoADataArrayTemplate; }
  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);
  }
 
protected:
  vtkScaledSOADataArrayTemplate();
  ~vtkScaledSOADataArrayTemplate() override;
 
  bool AllocateTuples(vtkIdType numTuples);
 
  bool ReallocateTuples(vtkIdType numTuples);
 
  std::vector<vtkBuffer<ValueType>*> Data;
  vtkBuffer<ValueType>* AoSCopy;
 
private:
  vtkScaledSOADataArrayTemplate(const vtkScaledSOADataArrayTemplate&) = delete;
  void operator=(const vtkScaledSOADataArrayTemplate&) = delete;
 
  inline void GetTupleIndexFromValueIndex(vtkIdType valueIdx, vtkIdType& tupleIdx, int& comp) const
  {
    tupleIdx = valueIdx / this->NumberOfComponents;
    comp = valueIdx % this->NumberOfComponents;
  }
 
  friend class vtkGenericDataArray<vtkScaledSOADataArrayTemplate<ValueTypeT>, ValueTypeT>;
  ValueType Scale;
};
 
// Declare vtkArrayDownCast implementations for scale SoA containers:
vtkArrayDownCast_TemplateFastCastMacro(vtkScaledSOADataArrayTemplate);
 
#endif // header guard
 
// This portion must be OUTSIDE the include blockers. This is used to tell
// libraries other than vtkCommonCore that instantiations of
// vtkScaledSOADataArrayTemplate can be found externally. This prevents each library
// from instantiating these on their own.
#ifdef VTK_SCALED_SOA_DATA_ARRAY_TEMPLATE_INSTANTIATING
#define VTK_SCALED_SOA_DATA_ARRAY_TEMPLATE_INSTANTIATE(T)                                          \
  namespace vtkDataArrayPrivate                                                                    \
  {                                                                                                \
  VTK_INSTANTIATE_VALUERANGE_ARRAYTYPE(vtkScaledSOADataArrayTemplate<T>, double);                  \
  }                                                                                                \
  template class VTKCOMMONCORE_EXPORT vtkScaledSOADataArrayTemplate<T>
 
#elif defined(VTK_USE_EXTERN_TEMPLATE)
#ifndef VTK_SCALED_SOA_DATA_ARRAY_TEMPLATE_EXTERN
#define VTK_SCALED_SOA_DATA_ARRAY_TEMPLATE_EXTERN
#ifdef _MSC_VER
#pragma warning(push)
// The following is needed when the vtkScaledSOADataArrayTemplate 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 vtkScaledSOADataArrayTemplate);
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif // VTK_SCALED_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 vtkScaledSOADataArrayTemplate);
 
#pragma warning(pop)
 
#endif
 
// VTK-HeaderTest-Exclude: vtkScaledSOADataArrayTemplate.h