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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 : public TilingSetRasterQueue { | |
20 public: | |
21 TilingSetRasterQueueRequired(PictureLayerTilingSet* tiling_set, | |
22 RasterTilePriorityQueue::Type type); | |
23 ~TilingSetRasterQueueRequired() override; | |
24 | |
25 Tile* Top() override; | |
26 const Tile* Top() const override; | |
27 void Pop() override; | |
28 bool IsEmpty() const override; | |
29 | |
30 private: | |
31 // This iterator will return all tiles that are in the NOW bin on the given | |
danakj
2015/01/12 18:23:13
Yay class comment!
| |
32 // tiling. The queue can then use these tiles and further filter them based on | |
33 // whether they are required or not. | |
34 class TilingIterator { | |
35 public: | |
36 TilingIterator(); | |
37 explicit TilingIterator(PictureLayerTiling* tiling, | |
38 TilingData* tiling_data); | |
39 ~TilingIterator(); | |
40 | |
41 bool done() const { return current_tile_ == nullptr; } | |
42 const Tile* operator*() const { return current_tile_; } | |
43 Tile* operator*() { return current_tile_; } | |
44 TilingIterator& operator++(); | |
45 | |
46 private: | |
47 PictureLayerTiling* tiling_; | |
48 TilingData* tiling_data_; | |
49 | |
50 Tile* current_tile_; | |
51 TilingData::Iterator visible_iterator_; | |
52 }; | |
53 | |
54 bool IsTileRequired(const Tile* tile) const; | |
55 | |
56 TilingIterator iterator_; | |
57 RasterTilePriorityQueue::Type type_; | |
58 }; | |
59 | |
60 } // namespace cc | |
61 | |
62 #endif // CC_RESOURCES_TILING_SET_RASTER_QUEUE_REQUIRED_H_ | |
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