cc: Rasterize cheap tiles immediately

cc/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_TILE_MANAGER_H_
 #define CC_TILE_MANAGER_H_
 
 #include <list>
 #include <queue>
 #include <vector>
 
 #include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/time.h"
 #include "base/values.h"
 #include "cc/memory_history.h"
 #include "cc/rendering_stats.h"
 #include "cc/resource_pool.h"
 #include "cc/tile_priority.h"
 
 namespace cc {
 class RasterWorkerPool;
 class ResourceProvider;
 class Tile;
@@ skipping 64 matching lines @@
 
 // This class manages tiles, deciding which should get rasterized and which
 // should no longer have any memory assigned to them. Tile objects are "owned"
 // by layers; they automatically register with the manager when they are
 // created, and unregister from the manager when they are deleted.
 class CC_EXPORT TileManager {
  public:
   TileManager(TileManagerClient* client,
               ResourceProvider *resource_provider,
               size_t num_raster_threads,
-              bool record_rendering_stats);
+              bool record_rendering_stats,
+              bool use_cheapess_estimator);
   virtual ~TileManager();
 
   const GlobalStateThatImpactsTilePriority& GlobalState() const {
       return global_state_;
   }
   void SetGlobalState(const GlobalStateThatImpactsTilePriority& state);
 
   void ManageTiles();
   void CheckForCompletedTileUploads();
+  void ResetCheapRasterBudget();
 
   scoped_ptr<base::Value> AsValue() const;
   void GetMemoryStats(size_t* memoryRequiredBytes,
                       size_t* memoryNiceToHaveBytes,
                       size_t* memoryUsedBytes) const;
   void GetRenderingStats(RenderingStats* stats);
   bool HasPendingWorkScheduled(WhichTree tree) const;
 
   const MemoryHistory::Entry& memory_stats_from_last_assign() const { return memory_stats_from_last_assign_; }
 
@@ skipping 19 matching lines @@
     client_->ScheduleManageTiles();
     manage_tiles_pending_ = true;
   }
   void DispatchMoreTasks();
   void GatherPixelRefsForTile(Tile* tile);
   void DispatchImageDecodeTasksForTile(Tile* tile);
   void DispatchOneImageDecodeTask(
       scoped_refptr<Tile> tile, skia::LazyPixelRef* pixel_ref);
   void OnImageDecodeTaskCompleted(
       scoped_refptr<Tile> tile, uint32_t pixel_ref_id);
-  bool CanDispatchRasterTask(Tile* tile);
+  bool CanDispatchRasterTask(Tile* tile) const;
+  bool CanPerformCheapRaster(Tile* tile) const;
+  scoped_ptr<ResourcePool::Resource> PrepareTileForRaster(Tile* tile);
   void DispatchOneRasterTask(scoped_refptr<Tile> tile);
+  void PerformOneRaster(Tile* tile);
+  void OnRasterCompleted(
+      scoped_refptr<Tile> tile,
+      scoped_ptr<ResourcePool::Resource> resource,
+      int manage_tiles_call_count_when_dispatched);
   void OnRasterTaskCompleted(
       scoped_refptr<Tile> tile,
       scoped_ptr<ResourcePool::Resource> resource,
       int manage_tiles_call_count_when_dispatched);
   void DidFinishTileInitialization(Tile* tile);
   void DidTileRasterStateChange(Tile* tile, TileRasterState state);
   void DidTileBinChange(Tile* tile,
                         TileManagerBin bin,
                         WhichTree tree);
   scoped_ptr<Value> GetMemoryRequirementsAsValue() const;
 
-  static void RunRasterTask(uint8* buffer,
+  static void PerformRaster(uint8* buffer,
                             const gfx::Rect& rect,
                             float contents_scale,
                             PicturePileImpl* picture_pile,
                             RenderingStats* stats);
   static void RunImageDecodeTask(skia::LazyPixelRef* pixel_ref,

[reveman, 2013/02/05 20:59:13]

PerformImageDecode to be consistent?

[Sami, 2013/02/06 15:25:14]

Yeah, good idea.

                                  RenderingStats* stats);
 
   TileManagerClient* client_;
   scoped_ptr<ResourcePool> resource_pool_;
   scoped_ptr<RasterWorkerPool> raster_worker_pool_;
   bool manage_tiles_pending_;
   int manage_tiles_call_count_;
 
   GlobalStateThatImpactsTilePriority global_state_;
 
@@ skipping 11 matching lines @@
 
   typedef std::queue<scoped_refptr<Tile> > TileQueue;
   TileQueue tiles_with_pending_set_pixels_;
   size_t bytes_pending_set_pixels_;
   bool ever_exceeded_memory_budget_;
   MemoryHistory::Entry memory_stats_from_last_assign_;
 
   bool record_rendering_stats_;
   RenderingStats rendering_stats_;
 
+  bool use_cheapness_estimator_;
+  int cheap_raster_count_;
+  base::TimeDelta cheap_raster_time_;
+
   int raster_state_count_[NUM_STATES][NUM_TREES][NUM_BINS];
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILE_MANAGER_H_