/*
 * 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 *m_outputBuffer;

  /**
   * \brief holds reference to the SDNA bNode, where this nodes will render the preview image for
   */
  bNodePreview *m_preview;
  SocketReader *m_input;
  float m_divider;
  unsigned int m_defaultWidth;
  unsigned int m_defaultHeight;

  const ColorManagedViewSettings *m_viewSettings;
  const ColorManagedDisplaySettings *m_displaySettings;

 public:
  PreviewOperation(const ColorManagedViewSettings *viewSettings,
                   const ColorManagedDisplaySettings *displaySettings,
                   unsigned int defaultWidth,
                   unsigned int defaultHeight);
  void verifyPreview(bNodeInstanceHash *previews, bNodeInstanceKey key);

  bool isOutputOperation(bool /*rendering*/) const override
  {
    return !G.background;
  }
  void initExecution() override;
  void deinitExecution() override;
  eCompositorPriority getRenderPriority() const override;

  void executeRegion(rcti *rect, unsigned int tileNumber) override;
  void determineResolution(unsigned int resolution[2],
                           unsigned int preferredResolution[2]) override;
  bool determineDependingAreaOfInterest(rcti *input,
                                        ReadBufferOperation *readOperation,
                                        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