Allow task pools to reason about transparency.

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 <deque>
 #include <queue>
 #include <set>
@@ skipping 136 matching lines @@
   const MemoryHistory::Entry& memory_stats_from_last_assign() const {
     return memory_stats_from_last_assign_;
   }
 
   // Public methods for testing.
   void InitializeTilesWithResourcesForTesting(const std::vector<Tile*>& tiles) {
     for (size_t i = 0; i < tiles.size(); ++i) {
       TileDrawInfo& draw_info = tiles[i]->draw_info();
       draw_info.resource_ = resource_pool_->AcquireResource(
           tiles[i]->desired_texture_size(),
-          tile_task_runner_->GetResourceFormat());
+          tile_task_runner_->GetResourceFormat(false));
     }
   }
 
   void ReleaseTileResourcesForTesting(const std::vector<Tile*>& tiles) {
     for (size_t i = 0; i < tiles.size(); ++i) {
       Tile* tile = tiles[i];
       FreeResourcesForTile(tile);
     }
   }
 
@@ skipping 105 matching lines @@
   FreeTileResourcesWithLowerPriorityUntilUsageIsWithinLimit(
       scoped_ptr<EvictionTilePriorityQueue> eviction_priority_queue,
       const MemoryUsage& limit,
       const TilePriority& oother_priority,
       MemoryUsage* usage);
   bool TilePriorityViolatesMemoryPolicy(const TilePriority& priority);
   bool AreRequiredTilesReadyToDraw(RasterTilePriorityQueue::Type type) const;
   void CheckIfMoreTilesNeedToBePrepared();
   void CheckAndIssueSignals();
 
+  ResourceFormat DetermineResourceFormat(const Tile* tile) const;
+  bool DetermineResourceRequiresSwizzle(const Tile* tile) const;
+
   TileManagerClient* client_;
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   ResourcePool* resource_pool_;
   TileTaskRunner* tile_task_runner_;
   GlobalStateThatImpactsTilePriority global_state_;
   size_t scheduled_raster_task_limit_;
 
   typedef base::hash_map<Tile::Id, Tile*> TileMap;
   TileMap tiles_;
 
@@ skipping 35 matching lines @@
 
   uint64_t prepare_tiles_count_;
   uint64_t next_tile_id_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_TILE_MANAGER_H_