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 9namespace cc { 10 11SurfaceResourceHolder::SurfaceResourceHolder(SurfaceFactoryClient* client) 12 : client_(client) { 13} 14 15SurfaceResourceHolder::~SurfaceResourceHolder() { 16} 17 18SurfaceResourceHolder::ResourceRefs::ResourceRefs() 19 : refs_received_from_child(0), refs_holding_resource_alive(0) { 20} 21 22void 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 33void 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 45void 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 70