COM_RotateOperation.h

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/* SPDX-FileCopyrightText: 2011 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include "COM_MultiThreadedOperation.h"
 
namespace blender::compositor {
 
class RotateOperation : public MultiThreadedOperation {
 private:
  constexpr static int IMAGE_INPUT_INDEX = 0;
  constexpr static int DEGREE_INPUT_INDEX = 1;
 
  float cosine_;
  float sine_;
  bool do_degree2_rad_conversion_;
  bool is_degree_set_;
  PixelSampler sampler_;
 
 public:
  RotateOperation();
 
  static void rotate_coords(
      float &x, float &y, float center_x, float center_y, float sine, float cosine)
  {
    const float dx = x - center_x;
    const float dy = y - center_y;
    x = center_x + (cosine * dx + sine * dy);
    y = center_y + (-sine * dx + cosine * dy);
  }
 
  static void get_rotation_center(const rcti &area, float &r_x, float &r_y);
  static void get_rotation_offset(const rcti &input_canvas,
                                  const rcti &rotate_canvas,
                                  float &r_offset_x,
                                  float &r_offset_y);
  static void get_area_rotation_bounds(
      const rcti &area, float center_x, float center_y, float sine, float cosine, rcti &r_bounds);
  static void get_area_rotation_bounds_inverted(
      const rcti &area, float center_x, float center_y, float sine, float cosine, rcti &r_bounds);
  static void get_rotation_area_of_interest(const rcti &input_canvas,
                                            const rcti &rotate_canvas,
                                            float sine,
                                            float cosine,
                                            const rcti &output_area,
                                            rcti &r_input_area);
  static void get_rotation_canvas(const rcti &input_canvas,
                                  float sine,
                                  float cosine,
                                  rcti &r_canvas);
 
  void init_data() override;
 
  void set_do_degree2_rad_conversion(bool abool)
  {
    do_degree2_rad_conversion_ = abool;
  }
 
  void set_sampler(PixelSampler sampler)
  {
    sampler_ = sampler;
  }
 
  void ensure_degree();
 
  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;
 
  void determine_canvas(const rcti &preferred_area, rcti &r_area) override;
};
 
}  // namespace blender::compositor