cc: Separate the priority from the tile and put in new PrioritizedTile
[chromium-blink-merge.git] / cc / resources / tiling_set_raster_queue_required.h
blob8cd01f6e1fcbcea08cd1c662bfd50c66bb8bb5b0
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.
5 #ifndef CC_RESOURCES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
6 #define CC_RESOURCES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
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"
13 namespace cc {
15 // This queue only returns tiles that are required for either activation or
16 // draw, as specified by RasterTilePriorityQueue::Type passed in the
17 // constructor.
18 class CC_EXPORT TilingSetRasterQueueRequired {
19 public:
20 TilingSetRasterQueueRequired(PictureLayerTilingSet* tiling_set,
21 RasterTilePriorityQueue::Type type);
22 ~TilingSetRasterQueueRequired();
24 const PrioritizedTile& Top() const;
25 void Pop();
26 bool IsEmpty() const;
28 private:
29 // This iterator will return all tiles that are in the NOW bin on the given
30 // tiling. The queue can then use these tiles and further filter them based on
31 // whether they are required or not.
32 class TilingIterator {
33 public:
34 TilingIterator();
35 explicit TilingIterator(PictureLayerTiling* tiling,
36 TilingData* tiling_data,
37 const gfx::Rect& rect);
38 ~TilingIterator();
40 bool done() const { return !current_tile_.tile(); }
41 const PrioritizedTile& operator*() const { return current_tile_; }
42 TilingIterator& operator++();
44 private:
45 PictureLayerTiling* tiling_;
46 TilingData* tiling_data_;
48 PrioritizedTile current_tile_;
49 TilingData::Iterator visible_iterator_;
52 bool IsTileRequired(const PrioritizedTile& prioritized_tile) const;
54 TilingIterator iterator_;
55 RasterTilePriorityQueue::Type type_;
58 } // namespace cc
60 #endif // CC_RESOURCES_TILING_SET_RASTER_QUEUE_REQUIRED_H_