dec_group_border.h

Enable keyboard shortcuts

// Copyright (c) the JPEG XL Project Authors. All rights reserved.

//

// Use of this source code is governed by a BSD-style

// license that can be found in the LICENSE file.

#ifndef LIB_JXL_DEC_GROUP_BORDER_H_

#define LIB_JXL_DEC_GROUP_BORDER_H_

#include <atomic>

#include <cstddef>

#include <cstdint>

#include <vector>

#include "lib/jxl/base/rect.h"

#include "lib/jxl/frame_dimensions.h"

namespace jxl {

class GroupBorderAssigner {

 public:

  // Prepare the GroupBorderAssigner to handle a given frame.

  void Init(const FrameDimensions& frame_dim);

  // Marks a group as done, and returns the (at most 3) rects to run

  // FinalizeImageRect on. `block_rect` must be the rect corresponding

  // to the given `group_id`, measured in blocks.

  void GroupDone(size_t group_id, size_t padx, size_t pady,

                 Rect* rects_to_finalize, size_t* num_to_finalize);

  // Marks a group as not-done, for running re-paints.

  void ClearDone(size_t group_id);

  static constexpr size_t kMaxToFinalize = 3;

 private:

  FrameDimensions frame_dim_;

  std::vector<std::atomic<uint8_t>> counters_;

  // Constants to identify group positions relative to the corners.

  static constexpr uint8_t kTopLeft = 0x01;

  static constexpr uint8_t kTopRight = 0x02;

  static constexpr uint8_t kBottomRight = 0x04;

  static constexpr uint8_t kBottomLeft = 0x08;

};

}  // namespace jxl

#endif  // LIB_JXL_DEC_GROUP_BORDER_H_