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/memory/weak_ptr.h" 11 #include "base/threading/thread_checker.h" 12 #include "cc/base/cc_export.h" 13 #include "cc/resources/return_callback.h" 14 #include "cc/resources/returned_resource.h" 15 #include "cc/resources/transferable_resource.h" 16 17 namespace cc { 18 19 class 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 26 class 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 DelegatedFrameResourceCollectionClient* client_; 50 51 ReturnedResourceArray returned_resources_for_child_compositor_; 52 bool lost_all_resources_; 53 54 struct RefCount { 55 int refs_to_return; 56 int refs_to_wait_for; 57 }; 58 typedef base::hash_map<unsigned, RefCount> ResourceIdRefCountMap; 59 ResourceIdRefCountMap resource_id_ref_count_map_; 60 61 base::ThreadChecker main_thread_checker_; 62 base::WeakPtrFactory<DelegatedFrameResourceCollection> weak_ptr_factory_; 63 64 DISALLOW_COPY_AND_ASSIGN(DelegatedFrameResourceCollection); 65 }; 66 67 } // namespace cc 68 69 #endif // CC_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_ 70