src/cc/resources/tile_manager.h

   1 // Copyright 2012 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_TILE_MANAGER_H_
   6 #define CC_RESOURCES_TILE_MANAGER_H_
   7
   8 #include <queue>
   9 #include <set>
  10 #include <vector>
  11
  12 #include "base/containers/hash_tables.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/values.h"
  15 #include "cc/base/ref_counted_managed.h"
  16 #include "cc/debug/rendering_stats_instrumentation.h"
  17 #include "cc/resources/managed_tile_state.h"
  18 #include "cc/resources/memory_history.h"
  19 #include "cc/resources/picture_pile_impl.h"
  20 #include "cc/resources/prioritized_tile_set.h"
  21 #include "cc/resources/raster_worker_pool.h"
  22 #include "cc/resources/resource_pool.h"
  23 #include "cc/resources/tile.h"
  24
  25 namespace cc {
  26 class RasterWorkerPoolDelegate;
  27 class ResourceProvider;
  28
  29 class CC_EXPORT TileManagerClient {
  30  public:
  31   virtual void NotifyReadyToActivate() = 0;
  32
  33  protected:
  34   virtual ~TileManagerClient() {}
  35 };
  36
  37 struct RasterTaskCompletionStats {
  38   RasterTaskCompletionStats();
  39
  40   size_t completed_count;
  41   size_t canceled_count;
  42 };
  43 scoped_ptr<base::Value> RasterTaskCompletionStatsAsValue(
  44     const RasterTaskCompletionStats& stats);
  45
  46 // This class manages tiles, deciding which should get rasterized and which
  47 // should no longer have any memory assigned to them. Tile objects are "owned"
  48 // by layers; they automatically register with the manager when they are
  49 // created, and unregister from the manager when they are deleted.
  50 class CC_EXPORT TileManager : public RasterWorkerPoolClient,
  51                               public RefCountedManager<Tile> {
  52  public:
  53   static scoped_ptr<TileManager> Create(
  54       TileManagerClient* client,
  55       ResourceProvider* resource_provider,
  56       ContextProvider* context_provider,
  57       RenderingStatsInstrumentation* rendering_stats_instrumentation,
  58       bool use_map_image,
  59       bool use_rasterize_on_demand,
  60       size_t max_transfer_buffer_usage_bytes,
  61       size_t max_raster_usage_bytes,
  62       unsigned map_image_texture_target);
  63   virtual ~TileManager();
  64
  65   void ManageTiles(const GlobalStateThatImpactsTilePriority& state);
  66
  67   // Returns true when visible tiles have been initialized.
  68   bool UpdateVisibleTiles();
  69
  70   scoped_refptr<Tile> CreateTile(PicturePileImpl* picture_pile,
  71                                  const gfx::Size& tile_size,
  72                                  const gfx::Rect& content_rect,
  73                                  const gfx::Rect& opaque_rect,
  74                                  float contents_scale,
  75                                  int layer_id,
  76                                  int source_frame_number,
  77                                  int flags);
  78
  79   scoped_ptr<base::Value> BasicStateAsValue() const;
  80   scoped_ptr<base::Value> AllTilesAsValue() const;
  81   void GetMemoryStats(size_t* memory_required_bytes,
  82                       size_t* memory_nice_to_have_bytes,
  83                       size_t* memory_allocated_bytes,
  84                       size_t* memory_used_bytes) const;
  85
  86   const MemoryHistory::Entry& memory_stats_from_last_assign() const {
  87     return memory_stats_from_last_assign_;
  88   }
  89
  90   void InitializeTilesWithResourcesForTesting(
  91       const std::vector<Tile*>& tiles,
  92       ResourceProvider* resource_provider) {
  93     for (size_t i = 0; i < tiles.size(); ++i) {
  94       ManagedTileState& mts = tiles[i]->managed_state();
  95       ManagedTileState::TileVersion& tile_version =
  96           mts.tile_versions[HIGH_QUALITY_NO_LCD_RASTER_MODE];
  97
  98       tile_version.resource_ = resource_pool_->AcquireResource(gfx::Size(1, 1));
  99
 100       bytes_releasable_ += BytesConsumedIfAllocated(tiles[i]);
 101       ++resources_releasable_;
 102     }
 103   }
 104
 105   void SetGlobalStateForTesting(
 106       const GlobalStateThatImpactsTilePriority& state) {
 107     // Soft limit is used for resource pool such that
 108     // memory returns to soft limit after going over.
 109     if (state != global_state_) {
 110       global_state_ = state;
 111       prioritized_tiles_dirty_ = true;
 112       resource_pool_->SetResourceUsageLimits(
 113           global_state_.soft_memory_limit_in_bytes,
 114           global_state_.unused_memory_limit_in_bytes,
 115           global_state_.num_resources_limit);
 116     }
 117   }
 118
 119  protected:
 120   TileManager(TileManagerClient* client,
 121               ResourceProvider* resource_provider,
 122               ContextProvider* context_provider,
 123               scoped_ptr<RasterWorkerPool> raster_worker_pool,
 124               scoped_ptr<RasterWorkerPool> direct_raster_worker_pool,
 125               size_t max_raster_usage_bytes,
 126               RenderingStatsInstrumentation* rendering_stats_instrumentation,
 127               bool use_rasterize_on_demand);
 128
 129   // Methods called by Tile
 130   friend class Tile;
 131   void DidChangeTilePriority(Tile* tile);
 132
 133   void CleanUpReleasedTiles();
 134
 135   // Overriden from RefCountedManager<Tile>:
 136   virtual void Release(Tile* tile) OVERRIDE;
 137
 138   // Overriden from RasterWorkerPoolClient:
 139   virtual bool ShouldForceTasksRequiredForActivationToComplete() const OVERRIDE;
 140   virtual void DidFinishRunningTasks() OVERRIDE;
 141   virtual void DidFinishRunningTasksRequiredForActivation() OVERRIDE;
 142
 143   typedef std::vector<Tile*> TileVector;
 144   typedef std::set<Tile*> TileSet;
 145
 146   // Virtual for test
 147   virtual void ScheduleTasks(
 148       const TileVector& tiles_that_need_to_be_rasterized);
 149
 150   void AssignGpuMemoryToTiles(PrioritizedTileSet* tiles,
 151                               TileVector* tiles_that_need_to_be_rasterized);
 152   void GetTilesWithAssignedBins(PrioritizedTileSet* tiles);
 153
 154  private:
 155   enum RasterWorkerPoolType {
 156     RASTER_WORKER_POOL_TYPE_DEFAULT,
 157     RASTER_WORKER_POOL_TYPE_DIRECT,
 158     NUM_RASTER_WORKER_POOL_TYPES
 159   };
 160
 161   void OnImageDecodeTaskCompleted(int layer_id,
 162                                   SkPixelRef* pixel_ref,
 163                                   bool was_canceled);
 164   void OnRasterTaskCompleted(Tile::Id tile,
 165                              scoped_ptr<ScopedResource> resource,
 166                              RasterMode raster_mode,
 167                              const PicturePileImpl::Analysis& analysis,
 168                              bool was_canceled);
 169
 170   inline size_t BytesConsumedIfAllocated(const Tile* tile) const {
 171     return Resource::MemorySizeBytes(tile->size(),
 172                                      raster_worker_pool_->GetResourceFormat());
 173   }
 174
 175   RasterMode DetermineRasterMode(const Tile* tile) const;
 176   void FreeResourceForTile(Tile* tile, RasterMode mode);
 177   void FreeResourcesForTile(Tile* tile);
 178   void FreeUnusedResourcesForTile(Tile* tile);
 179   RasterWorkerPool::Task CreateImageDecodeTask(Tile* tile,
 180                                                SkPixelRef* pixel_ref);
 181   RasterWorkerPool::RasterTask CreateRasterTask(Tile* tile);
 182   scoped_ptr<base::Value> GetMemoryRequirementsAsValue() const;
 183   void UpdatePrioritizedTileSetIfNeeded();
 184
 185   TileManagerClient* client_;
 186   ContextProvider* context_provider_;
 187   scoped_ptr<ResourcePool> resource_pool_;
 188   scoped_ptr<RasterWorkerPool> raster_worker_pool_;
 189   scoped_ptr<RasterWorkerPool> direct_raster_worker_pool_;
 190   scoped_ptr<RasterWorkerPoolDelegate> raster_worker_pool_delegate_;
 191   GlobalStateThatImpactsTilePriority global_state_;
 192
 193   typedef base::hash_map<Tile::Id, Tile*> TileMap;
 194   TileMap tiles_;
 195
 196   PrioritizedTileSet prioritized_tiles_;
 197   bool prioritized_tiles_dirty_;
 198
 199   bool all_tiles_that_need_to_be_rasterized_have_memory_;
 200   bool all_tiles_required_for_activation_have_memory_;
 201
 202   size_t memory_required_bytes_;
 203   size_t memory_nice_to_have_bytes_;
 204
 205   size_t bytes_releasable_;
 206   size_t resources_releasable_;
 207   size_t max_raster_usage_bytes_;
 208
 209   bool ever_exceeded_memory_budget_;
 210   MemoryHistory::Entry memory_stats_from_last_assign_;
 211
 212   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
 213
 214   bool did_initialize_visible_tile_;
 215   bool did_check_for_completed_tasks_since_last_schedule_tasks_;
 216
 217   typedef base::hash_map<uint32_t, RasterWorkerPool::Task> PixelRefTaskMap;
 218   typedef base::hash_map<int, PixelRefTaskMap> LayerPixelRefTaskMap;
 219   LayerPixelRefTaskMap image_decode_tasks_;
 220
 221   typedef base::hash_map<int, int> LayerCountMap;
 222   LayerCountMap used_layer_counts_;
 223
 224   RasterTaskCompletionStats update_visible_tiles_stats_;
 225
 226   std::vector<Tile*> released_tiles_;
 227
 228   bool use_rasterize_on_demand_;
 229
 230   // Queues used when scheduling raster tasks.
 231   RasterWorkerPool::RasterTask::Queue
 232       raster_queue_[NUM_RASTER_WORKER_POOL_TYPES];
 233
 234   DISALLOW_COPY_AND_ASSIGN(TileManager);
 235 };
 236
 237 }  // namespace cc
 238
 239 #endif  // CC_RESOURCES_TILE_MANAGER_H_