text: /**
   * Copyright (c) 2016-present, Facebook, Inc.
   *
   * 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
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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 ROI_POOL_F_OP_H_
  #define ROI_POOL_F_OP_H_
  
  #include "caffe2/core/context.h"
  #include "caffe2/core/logging.h"
  #include "caffe2/core/operator.h"
  #include "caffe2/utils/math.h"
  
  namespace caffe2 {
  
  template <typename T, class Context>
  class RoIPoolFOp final : public Operator<Context> {
   public:
    RoIPoolFOp(const OperatorDef& operator_def, Workspace* ws)
        : Operator<Context>(operator_def, ws),
          spatial_scale_(this->template GetSingleArgument<float>(
                "spatial_scale", 1.)),
          pooled_height_(this->template GetSingleArgument<int>("pooled_h", 1)),
          pooled_width_(this->template GetSingleArgument<int>("pooled_w", 1)) {
      DCHECK_GT(spatial_scale_, 0);
      DCHECK_GT(pooled_height_, 0);
      DCHECK_GT(pooled_width_, 0);
    }
    USE_OPERATOR_CONTEXT_FUNCTIONS;
  
    bool RunOnDevice() override {
      // No CPU implementation for now
      CAFFE_NOT_IMPLEMENTED;
    }
  
   protected:
    float spatial_scale_;
    int pooled_height_;
    int pooled_width_;
  };
  
  template <typename T, class Context>
  class RoIPoolFGradientOp final : public Operator<Context> {
   public:
    RoIPoolFGradientOp(const OperatorDef& def, Workspace* ws)
        : Operator<Context>(def, ws),
          spatial_scale_(this->template GetSingleArgument<float>(
                "spatial_scale", 1.)),
          pooled_height_(this->template GetSingleArgument<int>("pooled_h", 1)),
          pooled_width_(this->template GetSingleArgument<int>("pooled_w", 1)) {
      DCHECK_GT(spatial_scale_, 0);
      DCHECK_GT(pooled_height_, 0);
      DCHECK_GT(pooled_width_, 0);
    }
    USE_OPERATOR_CONTEXT_FUNCTIONS;
  
    bool RunOnDevice() override {
      // No CPU implementation for now
      CAFFE_NOT_IMPLEMENTED;
    }
  
   protected:
    float spatial_scale_;
    int pooled_height_;
    int pooled_width_;
  };
  
  } // namespace caffe2
  
  #endif // ROI_POOL_F_OP_H_
  