WIP GPU scheduler + delayed activation / tile draw

cc/tiles/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_TILES_TILE_MANAGER_H_
 #define CC_TILES_TILE_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 244 matching lines @@
 
   struct PrioritizedWorkToSchedule {
     PrioritizedWorkToSchedule();
     PrioritizedWorkToSchedule(PrioritizedWorkToSchedule&& other);
     ~PrioritizedWorkToSchedule();
 
     std::vector<PrioritizedTile> tiles_to_raster;
     std::vector<PrioritizedTile> tiles_to_process_for_images;
   };
 
+  void AcquireResourcesForTile(Tile* tile);
   void FreeResourcesForTile(Tile* tile);
   void FreeResourcesForTileAndNotifyClientIfTileWasReadyToDraw(Tile* tile);
   scoped_refptr<TileTask> CreateRasterTask(
       const PrioritizedTile& prioritized_tile,
       const gfx::ColorSpace& color_space);
 
   std::unique_ptr<EvictionTilePriorityQueue>
   FreeTileResourcesUntilUsageIsWithinLimit(
       std::unique_ptr<EvictionTilePriorityQueue> eviction_priority_queue,
       const MemoryUsage& limit,
@@ skipping 11 matching lines @@
   bool MarkTilesOutOfMemory(
       std::unique_ptr<RasterTilePriorityQueue> queue) const;
 
   ResourceFormat DetermineResourceFormat(const Tile* tile) const;
   bool DetermineResourceRequiresSwizzle(const Tile* tile) const;
 
   void DidFinishRunningTileTasksRequiredForActivation();
   void DidFinishRunningTileTasksRequiredForDraw();
   void DidFinishRunningAllTileTasks();
 
+  void OnRequiredForActivationTilesReadyToDraw();
+  void OnRequiredForDrawTilesReadyToDraw();
+
+  void CheckRequiredForActivationTilesReadyToDraw();
+  void CheckRequiredForDrawTilesReadyToDraw();
+
+  void OnTileReadyToDraw(Tile* tile);
+
   scoped_refptr<TileTask> CreateTaskSetFinishedTask(
       void (TileManager::*callback)());
   PrioritizedWorkToSchedule AssignGpuMemoryToTiles();
   void ScheduleTasks(const PrioritizedWorkToSchedule& work_to_schedule);
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
   ScheduledTasksStateAsValue() const;
 
   bool UsePartialRaster() const;
 
@@ skipping 16 matching lines @@
   bool did_oom_on_last_assign_;
 
   ImageController image_controller_;
 
   RasterTaskCompletionStats flush_stats_;
 
   std::vector<Tile*> released_tiles_;
 
   TaskGraph graph_;
 
+  std::vector<Tile*> pending_required_for_activation_tiles_;
+  std::vector<Tile*> pending_required_for_draw_tiles_;
+
   UniqueNotifier more_tiles_need_prepare_check_notifier_;
 
   Signals signals_;
 
   UniqueNotifier signals_check_notifier_;
 
   bool has_scheduled_tile_tasks_;
 
   uint64_t prepare_tiles_count_;
   uint64_t next_tile_id_;
 
   std::unordered_map<Tile::Id, std::vector<DrawImage>> scheduled_draw_images_;
   std::vector<scoped_refptr<TileTask>> locked_image_tasks_;
 
   base::WeakPtrFactory<TileManager> task_set_finished_weak_ptr_factory_;
 
+  base::WeakPtrFactory<TileManager> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_TILE_MANAGER_H_