File: raster_tile_priority_queue.h

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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_TILES_RASTER_TILE_PRIORITY_QUEUE_H_
#define CC_TILES_RASTER_TILE_PRIORITY_QUEUE_H_

#include <memory>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "cc/cc_export.h"
#include "cc/tiles/tile_priority.h"

namespace cc {
class PictureLayerImpl;
class PrioritizedTile;

class CC_EXPORT RasterTilePriorityQueue {
 public:
  enum class Type { ALL, REQUIRED_FOR_ACTIVATION, REQUIRED_FOR_DRAW };

  static std::unique_ptr<RasterTilePriorityQueue> Create(
      const std::vector<raw_ptr<PictureLayerImpl, VectorExperimental>>&
          active_layers,
      const std::vector<raw_ptr<PictureLayerImpl, VectorExperimental>>&
          pending_layers,
      TreePriority tree_priority,
      Type type);

  virtual ~RasterTilePriorityQueue() {}
  RasterTilePriorityQueue(const RasterTilePriorityQueue&) = delete;

  RasterTilePriorityQueue& operator=(const RasterTilePriorityQueue&) = delete;

  virtual bool IsEmpty() const = 0;
  virtual const PrioritizedTile& Top() const = 0;
  virtual void Pop() = 0;

 protected:
  RasterTilePriorityQueue() {}
};

}  // namespace cc

#endif  // CC_TILES_RASTER_TILE_PRIORITY_QUEUE_H_