cc/resources/tiling_set_raster_queue_required.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_RESOURCES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
   6 #define CC_RESOURCES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
   7
   8 #include "cc/base/cc_export.h"
   9 #include "cc/resources/picture_layer_tiling_set.h"
  10 #include "cc/resources/raster_tile_priority_queue.h"
  11 #include "cc/resources/tile.h"
  12 #include "cc/resources/tiling_set_raster_queue.h"
  13
  14 namespace cc {
  15
  16 // This queue only returns tiles that are required for either activation or
  17 // draw, as specified by RasterTilePriorityQueue::Type passed in the
  18 // constructor.
  19 class CC_EXPORT TilingSetRasterQueueRequired
  20     : public NON_EXPORTED_BASE(TilingSetRasterQueue) {
  21  public:
  22   TilingSetRasterQueueRequired(PictureLayerTilingSet* tiling_set,
  23                                RasterTilePriorityQueue::Type type);
  24   ~TilingSetRasterQueueRequired() override;
  25
  26   Tile* Top() override;
  27   const Tile* Top() const override;
  28   void Pop() override;
  29   bool IsEmpty() const override;
  30
  31  private:
  32   // This iterator will return all tiles that are in the NOW bin on the given
  33   // tiling. The queue can then use these tiles and further filter them based on
  34   // whether they are required or not.
  35   class TilingIterator {
  36    public:
  37     TilingIterator();
  38     explicit TilingIterator(PictureLayerTiling* tiling,
  39                             TilingData* tiling_data);
  40     ~TilingIterator();
  41
  42     bool done() const { return current_tile_ == nullptr; }
  43     const Tile* operator*() const { return current_tile_; }
  44     Tile* operator*() { return current_tile_; }
  45     TilingIterator& operator++();
  46
  47    private:
  48     PictureLayerTiling* tiling_;
  49     TilingData* tiling_data_;
  50
  51     Tile* current_tile_;
  52     TilingData::Iterator visible_iterator_;
  53   };
  54
  55   bool IsTileRequired(const Tile* tile) const;
  56
  57   TilingIterator iterator_;
  58   RasterTilePriorityQueue::Type type_;
  59 };
  60
  61 }  // namespace cc
  62
  63 #endif  // CC_RESOURCES_TILING_SET_RASTER_QUEUE_REQUIRED_H_