/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkGPUFunctorBase_h
#define itkGPUFunctorBase_h

#include "itkGPUKernelManager.h"

namespace itk
{
namespace Functor
{
/** \class GPUFunctorBase
 *
 * \brief Base functor class for GPU functor image filters.
 *
 * \ingroup ITKGPUCommon
 */
class GPUFunctorBase
{
public:
  // constructor
  GPUFunctorBase() = default;

  // destructor
  virtual ~GPUFunctorBase() = default;

  /** Setup GPU kernel arguments for this functor.
   * \return Current argument index to set additional arguments in the GPU kernel. */
  virtual int
  SetGPUKernelArguments(GPUKernelManager::Pointer KernelManager, int KernelHandle) = 0;
};

} // end of namespace Functor
} // end of namespace itk

#endif