cc/tiles/raster_tile_priority_queue.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_TILES_RASTER_TILE_PRIORITY_QUEUE_H_
   6 #define CC_TILES_RASTER_TILE_PRIORITY_QUEUE_H_
   7
   8 #include <vector>
   9
  10 #include "cc/base/cc_export.h"
  11 #include "cc/layers/picture_layer_impl.h"
  12 #include "cc/tiles/tile_priority.h"
  13
  14 namespace cc {
  15 class PrioritizedTile;
  16
  17 class CC_EXPORT RasterTilePriorityQueue {
  18  public:
  19   enum class Type { ALL, REQUIRED_FOR_ACTIVATION, REQUIRED_FOR_DRAW };
  20
  21   static scoped_ptr<RasterTilePriorityQueue> Create(
  22       const std::vector<PictureLayerImpl*>& active_layers,
  23       const std::vector<PictureLayerImpl*>& pending_layers,
  24       TreePriority tree_priority,
  25       Type type);
  26
  27   virtual ~RasterTilePriorityQueue() {}
  28
  29   virtual bool IsEmpty() const = 0;
  30   virtual const PrioritizedTile& Top() const = 0;
  31   virtual void Pop() = 0;
  32
  33  protected:
  34   RasterTilePriorityQueue() {}
  35
  36  private:
  37   DISALLOW_COPY_AND_ASSIGN(RasterTilePriorityQueue);
  38 };
  39
  40 }  // namespace cc
  41
  42 #endif  // CC_TILES_RASTER_TILE_PRIORITY_QUEUE_H_