COM_MultiThreadedRowOperation.h

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/* SPDX-FileCopyrightText: 2021 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include "COM_MultiThreadedOperation.h"
 
namespace blender::compositor {
 
class MultiThreadedRowOperation : public MultiThreadedOperation {
 protected:
  struct PixelCursor {
    float *out;
    int out_stride;
    const float *row_end;
    Array<const float *> ins;
    Array<int> in_strides;
 
   public:
    PixelCursor(int num_inputs);
 
    void next()
    {
      BLI_assert(out < row_end);
      out += out_stride;
      for (int i = 0; i < ins.size(); i++) {
        ins[i] += in_strides[i];
      }
    }
  };
 
 protected:
  virtual void update_memory_buffer_row(PixelCursor &p) = 0;
 
 private:
  void update_memory_buffer_partial(MemoryBuffer *output,
                                    const rcti &area,
                                    Span<MemoryBuffer *> inputs) final;
};
 
}  // namespace blender::compositor