Re-land: cc: Examine layers to determine if we're ready to activate.

cc/resources/tile_manager.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_TILE_MANAGER_H_
 #define CC_RESOURCES_TILE_MANAGER_H_
 
 #include <deque>
 #include <queue>
 #include <set>
@@ skipping 12 matching lines @@
 #include "cc/resources/prioritized_tile_set.h"
 #include "cc/resources/rasterizer.h"
 #include "cc/resources/resource_pool.h"
 #include "cc/resources/tile.h"
 
 namespace cc {
 class ResourceProvider;
 
 class CC_EXPORT TileManagerClient {
  public:
+  // Called when all tiles marked as required for activation are ready to draw.
   virtual void NotifyReadyToActivate() = 0;
-  virtual void NotifyTileInitialized(const Tile* tile) = 0;
+
+  // Called when the visible representation of a tile might have changed. Some
+  // examples are:
+  // - Tile version initialized.
+  // - Tile resources freed.
+  // - Tile marked for on-demand raster.
+  virtual void NotifyTileStateChanged(const Tile* tile) = 0;
 
  protected:
   virtual ~TileManagerClient() {}
 };
 
 struct RasterTaskCompletionStats {
   RasterTaskCompletionStats();
 
   size_t completed_count;
   size_t canceled_count;
@@ skipping 102 matching lines @@
     std::vector<PairedPictureLayerIterator> paired_iterators_;
     std::vector<PairedPictureLayerIterator*> iterator_heap_;
     TreePriority tree_priority_;
     EvictionOrderComparator comparator_;
 
     DISALLOW_COPY_AND_ASSIGN(EvictionTileIterator);
   };
 
   static scoped_ptr<TileManager> Create(
       TileManagerClient* client,
+      base::SequencedTaskRunner* task_runner,
       ResourcePool* resource_pool,
       Rasterizer* rasterizer,
-      bool use_rasterize_on_demand,
       RenderingStatsInstrumentation* rendering_stats_instrumentation);
   virtual ~TileManager();
 
   void ManageTiles(const GlobalStateThatImpactsTilePriority& state);
 
   // Returns true when visible tiles have been initialized.
   bool UpdateVisibleTiles();
 
   scoped_refptr<Tile> CreateTile(PicturePileImpl* picture_pile,
                                  const gfx::Size& tile_size,
@@ skipping 51 matching lines @@
       prioritized_tiles_dirty_ = true;
     }
   }
 
   void SetRasterizerForTesting(Rasterizer* rasterizer);
 
   void CleanUpReleasedTilesForTesting() { CleanUpReleasedTiles(); }
 
  protected:
   TileManager(TileManagerClient* client,
+              base::SequencedTaskRunner* task_runner,
               ResourcePool* resource_pool,
               Rasterizer* rasterizer,
-              bool use_rasterize_on_demand,
               RenderingStatsInstrumentation* rendering_stats_instrumentation);
 
   // Methods called by Tile
   friend class Tile;
   void DidChangeTilePriority(Tile* tile);
 
   void CleanUpReleasedTiles();
 
   // Overriden from RefCountedManager<Tile>:
   virtual void Release(Tile* tile) OVERRIDE;
@@ skipping 25 matching lines @@
                              bool was_canceled);
 
   inline size_t BytesConsumedIfAllocated(const Tile* tile) const {
     return Resource::MemorySizeBytes(tile->size(),
                                      resource_pool_->resource_format());
   }
 
   void FreeResourceForTile(Tile* tile, RasterMode mode);
   void FreeResourcesForTile(Tile* tile);
   void FreeUnusedResourcesForTile(Tile* tile);
+  void FreeResourcesForTileAndNotifyClientIfTileWasReadyToDraw(Tile* tile);
   scoped_refptr<ImageDecodeTask> CreateImageDecodeTask(Tile* tile,
                                                        SkPixelRef* pixel_ref);
   scoped_refptr<RasterTask> CreateRasterTask(Tile* tile);
   scoped_ptr<base::Value> GetMemoryRequirementsAsValue() const;
   void UpdatePrioritizedTileSetIfNeeded();
   void CleanUpLayers();
 
+  bool IsReadyToActivate() const;
+  void ScheduleCheckIfReadyToActivate();
+  void CheckIfReadyToActivate();
+
   TileManagerClient* client_;
+  scoped_refptr<base::SequencedTaskRunner> task_runner_;
   ResourcePool* resource_pool_;
   Rasterizer* rasterizer_;
   GlobalStateThatImpactsTilePriority global_state_;
 
   typedef base::hash_map<Tile::Id, Tile*> TileMap;
   TileMap tiles_;
 
   PrioritizedTileSet prioritized_tiles_;
   bool prioritized_tiles_dirty_;
 
@@ skipping 19 matching lines @@
   typedef base::hash_map<int, PixelRefTaskMap> LayerPixelRefTaskMap;
   LayerPixelRefTaskMap image_decode_tasks_;
 
   typedef base::hash_map<int, int> LayerCountMap;
   LayerCountMap used_layer_counts_;
 
   RasterTaskCompletionStats update_visible_tiles_stats_;
 
   std::vector<Tile*> released_tiles_;
 
-  bool use_rasterize_on_demand_;
-
   ResourceFormat resource_format_;
 
   // Queue used when scheduling raster tasks.
   RasterTaskQueue raster_queue_;
 
   std::vector<scoped_refptr<RasterTask> > orphan_raster_tasks_;
 
   std::vector<PictureLayerImpl*> layers_;
 
+  bool check_if_ready_to_activate_pending_;
+
+  base::WeakPtrFactory<TileManager> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_MANAGER_H_