Allow task pools to reason about transparency.

cc/raster/one_copy_tile_task_worker_pool.h

 // Copyright 2014 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_RASTER_ONE_COPY_TILE_TASK_WORKER_POOL_H_
 #define CC_RASTER_ONE_COPY_TILE_TASK_WORKER_POOL_H_
 
 #include <set>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 41 matching lines @@
       int max_staging_buffer_usage_in_bytes);
 
   // Overridden from TileTaskWorkerPool:
   TileTaskRunner* AsTileTaskRunner() override;
 
   // Overridden from TileTaskRunner:
   void SetClient(TileTaskRunnerClient* client) override;
   void Shutdown() override;
   void ScheduleTasks(TileTaskQueue* queue) override;
   void CheckForCompletedTasks() override;
-  ResourceFormat GetResourceFormat() const override;
-  bool GetResourceRequiresSwizzle() const override;
+  ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
+  bool GetResourceRequiresSwizzle(bool must_support_alpha) const override;
 
   // Overridden from TileTaskClient:
   scoped_ptr<RasterBuffer> AcquireBufferForRaster(
       const Resource* resource,
       uint64_t resource_content_id,
       uint64_t previous_content_id) override;
   void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) override;
 
   // Overridden from base::trace_event::MemoryDumpProvider:
   bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
@@ skipping 31 matching lines @@
 
     const gfx::Size size;
     scoped_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer;
     base::TimeTicks last_usage;
     unsigned texture_id;
     unsigned image_id;
     unsigned query_id;
     uint64_t content_id;
   };
 
-  void AddStagingBuffer(const StagingBuffer* staging_buffer);
+  void AddStagingBuffer(const StagingBuffer* staging_buffer,
+                        ResourceFormat format);
   void RemoveStagingBuffer(const StagingBuffer* staging_buffer);
   void MarkStagingBufferAsFree(const StagingBuffer* staging_buffer);
   void MarkStagingBufferAsBusy(const StagingBuffer* staging_buffer);
   scoped_ptr<StagingBuffer> AcquireStagingBuffer(const Resource* resource,
                                                  uint64_t previous_content_id);
   base::TimeTicks GetUsageTimeForLRUBuffer();
   void ScheduleReduceMemoryUsage();
   void ReduceMemoryUsage();
   void ReleaseBuffersNotUsedSince(base::TimeTicks time);
 
@@ skipping 38 matching lines @@
   // canceled when ScheduleTasks() is called.
   base::WeakPtrFactory<OneCopyTileTaskWorkerPool>
       task_set_finished_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OneCopyTileTaskWorkerPool);
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_ONE_COPY_TILE_TASK_WORKER_POOL_H_