cc: Partial tile update for one-copy raster.

cc/resources/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_RESOURCES_ONE_COPY_TILE_TASK_WORKER_POOL_H_
 #define CC_RESOURCES_ONE_COPY_TILE_TASK_WORKER_POOL_H_
 
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/values.h"
@@ skipping 34 matching lines @@
 
   // Overridden from TileTaskRunner:
   void SetClient(TileTaskRunnerClient* client) override;
   void Shutdown() override;
   void ScheduleTasks(TileTaskQueue* queue) override;
   void CheckForCompletedTasks() override;
   ResourceFormat GetResourceFormat() override;
 
   // Overridden from TileTaskClient:
   scoped_ptr<RasterBuffer> AcquireBufferForRaster(
-      const Resource* resource) override;
+      const TileTaskData& data) override;
   void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) override;
 
   // Playback raster source and schedule copy of |src| resource to |dst|
   // resource. Returns a non-zero sequence number for this copy operation.
   CopySequenceNumber PlaybackAndScheduleCopyOnWorkerThread(
+      bool reusing_raster_resource,
       scoped_ptr<ResourceProvider::ScopedWriteLockGpuMemoryBuffer> write_lock,
       scoped_ptr<ScopedResource> src,
-      const Resource* dst,
+      scoped_ptr<ResourceProvider::ScopedReadLockGpuMemoryBuffer>
+          previous_frame_read_lock,
+      scoped_ptr<ScopedResource> previous_frame_src,
+      const TileTaskData& data,
       const RasterSource* raster_source,
       const gfx::Rect& rect,
       float scale);
 
   // Issues copy operations until |sequence| has been processed. This will
   // return immediately if |sequence| has already been processed.
   void AdvanceLastIssuedCopyTo(CopySequenceNumber sequence);
 
  protected:
   OneCopyTileTaskWorkerPool(base::SequencedTaskRunner* task_runner,
                             TaskGraphRunner* task_graph_runner,
                             ContextProvider* context_provider,
                             ResourceProvider* resource_provider,
                             ResourcePool* resource_pool);
 
  private:
   struct CopyOperation {
     typedef ScopedPtrDeque<CopyOperation> Deque;
 
     CopyOperation(
         scoped_ptr<ResourceProvider::ScopedWriteLockGpuMemoryBuffer> write_lock,
         scoped_ptr<ScopedResource> src,
-        const Resource* dst);
+        scoped_ptr<ResourceProvider::ScopedReadLockGpuMemoryBuffer>
+            previous_frame_read_lock,
+        scoped_ptr<ScopedResource> previous_frame_src,
+        const TileTaskData& data);
     ~CopyOperation();
 
     scoped_ptr<ResourceProvider::ScopedWriteLockGpuMemoryBuffer> write_lock;
     scoped_ptr<ScopedResource> src;
-    const Resource* dst;
+    scoped_ptr<ResourceProvider::ScopedReadLockGpuMemoryBuffer>
+        previous_frame_read_lock;
+    scoped_ptr<ScopedResource> previous_frame_src;
+    TileTaskData tile_task_data;
   };
 
   void OnTaskSetFinished(TaskSet task_set);
   void AdvanceLastFlushedCopyTo(CopySequenceNumber sequence);
   void IssueCopyOperations(int64 count);
   void ScheduleCheckForCompletedCopyOperationsWithLockAcquired(
       bool wait_if_needed);
   void CheckForCompletedCopyOperations(bool wait_if_needed);
   scoped_refptr<base::trace_event::ConvertableToTraceFormat> StateAsValue()
       const;
@@ skipping 33 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_RESOURCES_ONE_COPY_TILE_TASK_WORKER_POOL_H_