/*
 * 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 "BKE_global.h"
#include "BLI_rect.h"
#include "COM_MultiThreadedOperation.h"
#include "DNA_color_types.h"
#include "DNA_image_types.h"

namespace blender::compositor {

class PreviewOperation : public MultiThreadedOperation {
 protected:
  unsigned char *output_buffer_;

  /**
   * \brief holds reference to the SDNA bNode, where this nodes will render the preview image for
   */
  bNodePreview *preview_;
  SocketReader *input_;
  float divider_;
  unsigned int default_width_;
  unsigned int default_height_;

  const ColorManagedViewSettings *view_settings_;
  const ColorManagedDisplaySettings *display_settings_;

 public:
  PreviewOperation(const ColorManagedViewSettings *view_settings,
                   const ColorManagedDisplaySettings *display_settings,
                   unsigned int default_width,
                   unsigned int default_height);
  void verify_preview(bNodeInstanceHash *previews, bNodeInstanceKey key);

  bool is_output_operation(bool /*rendering*/) const override
  {
    return !G.background;
  }
  void init_execution() override;
  void deinit_execution() override;
  eCompositorPriority get_render_priority() const override;

  void execute_region(rcti *rect, unsigned int tile_number) override;
  void determine_canvas(const rcti &preferred_area, rcti &r_area) override;
  bool determine_depending_area_of_interest(rcti *input,
                                            ReadBufferOperation *read_operation,
                                            rcti *output) override;

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

}  // namespace blender::compositor