MaskIndices.h

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//============================================================================
//  The contents of this file are covered by the Viskores license. See
//  LICENSE.txt for details.
//
//  By contributing to this file, all contributors agree to the Developer
//  Certificate of Origin Version 1.1 (DCO 1.1) as stated in DCO.txt.
//============================================================================
 
//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt 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 viskores_worklet_MaskIndices_h
#define viskores_worklet_MaskIndices_h
 
#include <viskores/cont/Algorithm.h>
#include <viskores/worklet/internal/MaskBase.h>
 
namespace viskores
{
namespace worklet
{
 
class MaskIndices : public internal::MaskBase
{
public:
  using ThreadToOutputMapType = viskores::cont::ArrayHandle<viskores::Id>;
 
  explicit MaskIndices(
    const viskores::cont::ArrayHandle<viskores::Id>& indexArray,
    viskores::cont::DeviceAdapterId viskoresNotUsed(device) = viskores::cont::DeviceAdapterTagAny())
  {
    this->ThreadToOutputMap = indexArray;
  }
 
  template <typename T, typename S>
  explicit MaskIndices(
    const viskores::cont::ArrayHandle<T, S>& indexArray,
    viskores::cont::DeviceAdapterId device = viskores::cont::DeviceAdapterTagAny())
  {
    viskores::cont::Algorithm::Copy(device, indexArray, this->ThreadToOutputMap);
  }
 
  // TODO? Create a version that accepts an UnknownArrayHandle. Is this needed?
 
  template <typename RangeType>
  viskores::Id GetThreadRange(RangeType viskoresNotUsed(outputRange)) const
  {
    return this->ThreadToOutputMap.GetNumberOfValues();
  }
 
  template <typename RangeType>
  ThreadToOutputMapType GetThreadToOutputMap(RangeType viskoresNotUsed(outputRange)) const
  {
    return this->ThreadToOutputMap;
  }
 
private:
  ThreadToOutputMapType ThreadToOutputMap;
};
}
} // namespace viskores::worklet
 
#endif //viskores_worklet_MaskIndices_h