/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Copyright 2011, Blender Foundation.
 */

#pragma once

#include "COM_NodeOperation.h"
#include "COM_QualityStepHelper.h"
#include "DNA_node_types.h"

namespace blender::compositor {

class VectorBlurOperation : public NodeOperation, public QualityStepHelper {
 private:
  static constexpr int IMAGE_INPUT_INDEX = 0;
  static constexpr int Z_INPUT_INDEX = 1;
  static constexpr int SPEED_INPUT_INDEX = 2;

  /**
   * \brief Cached reference to the input_program
   */
  SocketReader *input_image_program_;
  SocketReader *input_speed_program_;
  SocketReader *input_zprogram_;

  /**
   * \brief settings of the glare node.
   */
  NodeBlurData *settings_;

  float *cached_instance_;

 public:
  VectorBlurOperation();

  /**
   * The inner loop of this operation.
   */
  void execute_pixel(float output[4], int x, int y, void *data) override;

  /**
   * Initialize the execution
   */
  void init_execution() override;

  /**
   * Deinitialize the execution
   */
  void deinit_execution() override;

  void *initialize_tile_data(rcti *rect) override;

  void set_vector_blur_settings(NodeBlurData *settings)
  {
    settings_ = settings;
  }
  bool determine_depending_area_of_interest(rcti *input,
                                            ReadBufferOperation *read_operation,
                                            rcti *output) override;

  void get_area_of_interest(const int input_idx,
                            const rcti &output_area,
                            rcti &r_input_area) override;
  void update_memory_buffer(MemoryBuffer *output,
                            const rcti &area,
                            Span<MemoryBuffer *> inputs) override;

 protected:
  void generate_vector_blur(float *data,
                            MemoryBuffer *input_image,
                            MemoryBuffer *input_speed,
                            MemoryBuffer *inputZ);
};

}  // namespace blender::compositor