delegated_frame_resource_collection.h revision 8bcbed890bc3ce4d7a057a8f32cab53fa534672e
1// Copyright 2013 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_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_ 6#define CC_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_ 7 8#include "base/containers/hash_tables.h" 9#include "base/memory/ref_counted.h" 10#include "base/threading/thread_checker.h" 11#include "cc/base/cc_export.h" 12#include "cc/resources/return_callback.h" 13#include "cc/resources/returned_resource.h" 14#include "cc/resources/transferable_resource.h" 15 16namespace cc { 17class BlockingTaskRunner; 18 19class CC_EXPORT DelegatedFrameResourceCollectionClient { 20 public: 21 // Called to inform the client that returned resources can be 22 // grabbed off the DelegatedFrameResourceCollection. 23 virtual void UnusedResourcesAreAvailable() = 0; 24}; 25 26class CC_EXPORT DelegatedFrameResourceCollection 27 : public base::RefCounted<DelegatedFrameResourceCollection> { 28 public: 29 DelegatedFrameResourceCollection(); 30 31 void SetClient(DelegatedFrameResourceCollectionClient* client); 32 33 void TakeUnusedResourcesForChildCompositor(ReturnedResourceArray* array); 34 35 // Considers all resources as lost, and returns true if it held any resource 36 // to lose. 37 bool LoseAllResources(); 38 39 // Methods for DelegatedFrameProvider. 40 void RefResources(const TransferableResourceArray& resources); 41 void UnrefResources(const ReturnedResourceArray& returned); 42 void ReceivedResources(const TransferableResourceArray& resources); 43 ReturnCallback GetReturnResourcesCallbackForImplThread(); 44 45 private: 46 friend class base::RefCounted<DelegatedFrameResourceCollection>; 47 ~DelegatedFrameResourceCollection(); 48 49 void UnrefResourcesOnImplThread( 50 scoped_refptr<BlockingTaskRunner> main_thread_runner, 51 const ReturnedResourceArray& returned); 52 53 DelegatedFrameResourceCollectionClient* client_; 54 scoped_refptr<BlockingTaskRunner> main_thread_runner_; 55 56 ReturnedResourceArray returned_resources_for_child_compositor_; 57 bool lost_all_resources_; 58 59 struct RefCount { 60 int refs_to_return; 61 int refs_to_wait_for; 62 }; 63 typedef base::hash_map<unsigned, RefCount> ResourceIdRefCountMap; 64 ResourceIdRefCountMap resource_id_ref_count_map_; 65 66 base::ThreadChecker main_thread_checker_; 67 68 DISALLOW_COPY_AND_ASSIGN(DelegatedFrameResourceCollection); 69}; 70 71} // namespace cc 72 73#endif // CC_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_ 74