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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 |
| 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_ |
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