1 // Copyright 2012 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_RESOURCES_RESOURCE_UPDATE_CONTROLLER_H_ 6 #define CC_RESOURCES_RESOURCE_UPDATE_CONTROLLER_H_ 7 8 #include "base/basictypes.h" 9 #include "base/memory/scoped_ptr.h" 10 #include "base/memory/weak_ptr.h" 11 #include "base/time/time.h" 12 #include "cc/base/cc_export.h" 13 #include "cc/resources/resource_update_queue.h" 14 15 namespace base { class SingleThreadTaskRunner; } 16 17 namespace cc { 18 19 class ResourceProvider; 20 21 class ResourceUpdateControllerClient { 22 public: 23 virtual void ReadyToFinalizeTextureUpdates() = 0; 24 25 protected: 26 virtual ~ResourceUpdateControllerClient() {} 27 }; 28 29 class CC_EXPORT ResourceUpdateController { 30 public: 31 static scoped_ptr<ResourceUpdateController> Create( 32 ResourceUpdateControllerClient* client, 33 base::SingleThreadTaskRunner* task_runner, 34 scoped_ptr<ResourceUpdateQueue> queue, 35 ResourceProvider* resource_provider) { 36 return make_scoped_ptr(new ResourceUpdateController( 37 client, task_runner, queue.Pass(), resource_provider)); 38 } 39 static size_t MaxPartialTextureUpdates(); 40 41 virtual ~ResourceUpdateController(); 42 43 // Discard uploads to textures that were evicted on the impl thread. 44 void DiscardUploadsToEvictedResources(); 45 46 void PerformMoreUpdates(base::TimeTicks time_limit); 47 void Finalize(); 48 49 50 // Virtual for testing. 51 virtual base::TimeTicks Now() const; 52 virtual base::TimeDelta UpdateMoreTexturesTime() const; 53 virtual size_t UpdateMoreTexturesSize() const; 54 55 protected: 56 ResourceUpdateController(ResourceUpdateControllerClient* client, 57 base::SingleThreadTaskRunner* task_runner, 58 scoped_ptr<ResourceUpdateQueue> queue, 59 ResourceProvider* resource_provider); 60 61 private: 62 static size_t MaxFullUpdatesPerTick(ResourceProvider* resource_provider); 63 64 size_t MaxBlockingUpdates() const; 65 base::TimeDelta PendingUpdateTime() const; 66 67 void UpdateTexture(ResourceUpdate update); 68 69 // This returns true when there were textures left to update. 70 bool UpdateMoreTexturesIfEnoughTimeRemaining(); 71 void UpdateMoreTexturesNow(); 72 void OnTimerFired(); 73 74 ResourceUpdateControllerClient* client_; 75 scoped_ptr<ResourceUpdateQueue> queue_; 76 bool contents_textures_purged_; 77 ResourceProvider* resource_provider_; 78 base::TimeTicks time_limit_; 79 size_t texture_updates_per_tick_; 80 bool first_update_attempt_; 81 base::SingleThreadTaskRunner* task_runner_; 82 base::WeakPtrFactory<ResourceUpdateController> weak_factory_; 83 bool task_posted_; 84 85 DISALLOW_COPY_AND_ASSIGN(ResourceUpdateController); 86 }; 87 88 } // namespace cc 89 90 #endif // CC_RESOURCES_RESOURCE_UPDATE_CONTROLLER_H_ 91