Merge 241994 "Revert "cc: Added tile bundles""

cc/resources/tile_bundle.h

-// Copyright 2013 The Chromium 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 CC_RESOURCES_TILE_BUNDLE_H_
-#define CC_RESOURCES_TILE_BUNDLE_H_
-
-#include <utility>
-#include <vector>
-
-#include "base/memory/ref_counted.h"
-#include "cc/base/ref_counted_managed.h"
-#include "cc/resources/tile_priority.h"
-
-namespace cc {
-
-class TileManager;
-class Tile;
-class PictureLayerTiling;
-
-class CC_EXPORT TileBundle : public RefCountedManaged<TileBundle> {
- public:
-  typedef uint64 Id;
-  typedef std::vector<scoped_refptr<Tile> > TileVector;
-  typedef std::vector<TileVector> TileGrid;
-
-  inline Id id() const { return id_; }
-
-  Tile* TileAt(WhichTree tree, int index_x, int index_y);
-  bool RemoveTileAt(WhichTree tree, int index_x, int index_y);
-  void AddTileAt(WhichTree tree,
-                 int index_x,
-                 int index_y,
-                 scoped_refptr<Tile> tile);
-  bool IsEmpty() const { return conservative_tile_count_ == 0; }
-
-  void DidBecomeRecycled();
-  void DidBecomeActive();
-
-  void SetPriority(WhichTree tree, const TilePriority& priority);
-  TilePriority GetPriority(WhichTree tree) const;
-
-  void SwapTilesIfRequired();
-
-  class CC_EXPORT Iterator {
-   public:
-    explicit Iterator(TileBundle* bundle);
-    Iterator(TileBundle* bundle, WhichTree tree);
-    ~Iterator();
-
-    Iterator& operator++();
-
-    inline Tile* operator*() { return current_tile_; }
-    inline Tile* operator->() { return current_tile_; }
-    inline operator bool() const {
-      return index_y_ < bundle_->index_count_y_;
-    }
-
-    inline int index_x() {
-      return index_x_ + bundle_->index_offset_x_;
-    }
-    inline int index_y() {
-      return index_y_ + bundle_->index_offset_y_;
-    }
-
-    TilePriority priority(WhichTree tree) const {
-      return bundle_->GetPriority(tree);
-    }
-
-   private:
-    bool InitializeNewTile();
-
-    TileBundle* bundle_;
-    Tile* current_tile_;
-    int index_x_;
-    int index_y_;
-    WhichTree current_tree_;
-
-    WhichTree min_tree_;
-    WhichTree max_tree_;
-  };
-
- private:
-  friend class TileManager;
-  friend class Iterator;
-
-  TileBundle(TileManager* tile_manager,
-             int offset_x,
-             int offset_y,
-             int width,
-             int height);
-  ~TileBundle();
-
-  void UpdateToLocalIndex(int* index_x, int* index_y);
-  Tile* TileAtLocalIndex(WhichTree tree, int x, int y);
-
-  TileManager* tile_manager_;
-
-  TileGrid tiles_[NUM_TREES];
-  int index_offset_x_;
-  int index_offset_y_;
-  int index_count_x_;
-  int index_count_y_;
-
-  TilePriority priority_[NUM_TREES];
-  int conservative_tile_count_;
-  bool needs_tile_swap_;
-
-  Id id_;
-  static Id s_next_id_;
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_TILE_BUNDLE_H_