| // 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_SURFACES_SURFACE_H_ |
| #define CC_SURFACES_SURFACE_H_ |
| |
| #include "base/containers/hash_tables.h" |
| #include "base/macros.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "cc/resources/resource_provider.h" |
| #include "cc/resources/return_callback.h" |
| #include "cc/surfaces/surface_client.h" |
| #include "cc/surfaces/surface_id.h" |
| #include "cc/surfaces/surfaces_export.h" |
| #include "ui/gfx/size.h" |
| |
| namespace cc { |
| class CompositorFrame; |
| class SurfaceManager; |
| |
| class CC_SURFACES_EXPORT Surface { |
| public: |
| Surface(SurfaceManager* manager, |
| SurfaceClient* client, |
| const gfx::Size& size); |
| ~Surface(); |
| |
| const gfx::Size& size() const { return size_; } |
| SurfaceId surface_id() const { return surface_id_; } |
| |
| void QueueFrame(scoped_ptr<CompositorFrame> frame); |
| // Returns the most recent frame that is eligible to be rendered. |
| CompositorFrame* GetEligibleFrame(); |
| |
| // Takes a reference to all of the current frame's resources for an external |
| // consumer (e.g. a ResourceProvider). The caller to this should call |
| // UnrefResources() when they are done with the resources. |
| void RefCurrentFrameResources(); |
| void UnrefResources(const ReturnedResourceArray& resources); |
| |
| // Returns all resources that are currently not in use to the client. |
| void ReturnUnusedResourcesToClient(); |
| |
| private: |
| void ReceiveResourcesFromClient(const TransferableResourceArray& resources); |
| |
| SurfaceManager* manager_; |
| SurfaceClient* client_; |
| gfx::Size size_; |
| SurfaceId surface_id_; |
| // TODO(jamesr): Support multiple frames in flight. |
| scoped_ptr<CompositorFrame> current_frame_; |
| |
| struct ResourceRefs { |
| ResourceRefs(); |
| |
| int refs_received_from_child; |
| int refs_holding_resource_alive; |
| }; |
| // Keeps track of the number of users currently in flight for each resource |
| // ID we've received from the client. When this counter hits zero for a |
| // particular resource, that ID is available to return to the client. |
| typedef base::hash_map<ResourceProvider::ResourceId, ResourceRefs> |
| ResourceIdCountMap; |
| ResourceIdCountMap resource_id_use_count_map_; |
| |
| ReturnedResourceArray resources_available_to_return_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Surface); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_SURFACES_SURFACE_H_ |