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1 // Copyright 2014 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 #include "cc/surfaces/surface_resource_holder.h" | |
6 | |
7 #include "cc/surfaces/surface_factory_client.h" | |
8 | |
9 namespace cc { | |
10 | |
11 SurfaceResourceHolder::SurfaceResourceHolder(SurfaceFactoryClient* client) | |
12 : client_(client) { | |
13 } | |
14 | |
15 SurfaceResourceHolder::~SurfaceResourceHolder() { | |
16 } | |
17 | |
18 SurfaceResourceHolder::ResourceRefs::ResourceRefs() | |
19 : refs_received_from_child(0), refs_holding_resource_alive(0) { | |
20 } | |
21 | |
22 void SurfaceResourceHolder::ReceiveFromChild( | |
23 const TransferableResourceArray& resources) { | |
24 for (TransferableResourceArray::const_iterator it = resources.begin(); | |
25 it != resources.end(); | |
26 ++it) { | |
27 ResourceRefs& ref = resource_id_use_count_map_[it->id]; | |
28 ref.refs_holding_resource_alive++; | |
29 ref.refs_received_from_child++; | |
30 } | |
31 } | |
32 | |
33 void SurfaceResourceHolder::RefResources( | |
34 const TransferableResourceArray& resources) { | |
35 for (TransferableResourceArray::const_iterator it = resources.begin(); | |
36 it != resources.end(); | |
37 ++it) { | |
38 ResourceIdCountMap::iterator count_it = | |
39 resource_id_use_count_map_.find(it->id); | |
40 DCHECK(count_it != resource_id_use_count_map_.end()); | |
41 count_it->second.refs_holding_resource_alive++; | |
42 } | |
43 } | |
44 | |
45 void SurfaceResourceHolder::UnrefResources( | |
46 const ReturnedResourceArray& resources) { | |
47 ReturnedResourceArray resources_available_to_return; | |
48 | |
49 for (ReturnedResourceArray::const_iterator it = resources.begin(); | |
50 it != resources.end(); | |
51 ++it) { | |
52 ResourceProvider::ResourceId id = it->id; | |
53 ResourceIdCountMap::iterator count_it = resource_id_use_count_map_.find(id); | |
54 if (count_it == resource_id_use_count_map_.end()) | |
55 continue; | |
56 ResourceRefs& ref = count_it->second; | |
57 ref.refs_holding_resource_alive -= it->count; | |
58 if (ref.refs_holding_resource_alive == 0) { | |
59 ReturnedResource returned = *it; | |
60 returned.count = ref.refs_received_from_child; | |
61 resources_available_to_return.push_back(returned); | |
62 resource_id_use_count_map_.erase(count_it); | |
63 } | |
64 } | |
65 | |
66 client_->ReturnResources(resources_available_to_return); | |
67 } | |
68 | |
69 } // namespace cc | |
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