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| 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 #include "cc/resource_pool.h" | |
| 6 | |
| 7 #include "cc/resource_provider.h" | |
| 8 | |
| 9 namespace cc { | |
| 10 | |
| 11 ResourcePool::Resource::Resource(cc::ResourceProvider* resource_provider, | |
| 12 const gfx::Size& size, | |
| 13 GLenum format) | |
| 14 : cc::Resource(resource_provider->CreateManagedResource( | |
| 15 size, | |
| 16 format, | |
| 17 ResourceProvider::TextureUsageAny), | |
| 18 size, | |
| 19 format), | |
| 20 resource_provider_(resource_provider) { | |
| 21 DCHECK(id()); | |
| 22 } | |
| 23 | |
| 24 ResourcePool::Resource::~Resource() { | |
| 25 DCHECK(id()); | |
| 26 DCHECK(resource_provider_); | |
| 27 resource_provider_->DeleteResource(id()); | |
| 28 } | |
| 29 | |
| 30 ResourcePool::ResourcePool(ResourceProvider* resource_provider) | |
| 31 : resource_provider_(resource_provider), | |
| 32 max_memory_usage_bytes_(0), | |
| 33 memory_usage_bytes_(0) { | |
| 34 } | |
| 35 | |
| 36 ResourcePool::~ResourcePool() { | |
| 37 SetMaxMemoryUsageBytes(0); | |
| 38 } | |
| 39 | |
| 40 scoped_ptr<ResourcePool::Resource> ResourcePool::AcquireResource( | |
| 41 const gfx::Size& size, GLenum format) { | |
| 42 for (ResourceList::iterator it = resources_.begin(); | |
| 43 it != resources_.end(); ++it) { | |
| 44 Resource* resource = *it; | |
| 45 | |
| 46 // TODO(epenner): It would be nice to DCHECK that this | |
| 47 // doesn't happen two frames in a row for any resource | |
| 48 // in this pool. | |
| 49 if (!resource_provider_->CanLockForWrite(resource->id())) | |
| 50 continue; | |
| 51 | |
| 52 if (resource->size() != size) | |
| 53 continue; | |
| 54 if (resource->format() != format) | |
| 55 continue; | |
| 56 | |
| 57 resources_.erase(it); | |
| 58 return make_scoped_ptr(resource); | |
| 59 } | |
| 60 | |
| 61 // Create new resource. | |
| 62 Resource* resource = new Resource( | |
| 63 resource_provider_, size, format); | |
| 64 | |
| 65 // Extend all read locks on all resources until the resource is | |
| 66 // finished being used, such that we know when resources are | |
| 67 // truly safe to recycle. | |
| 68 resource_provider_->EnableReadLockFences(resource->id(), true); | |
| 69 | |
| 70 memory_usage_bytes_ += resource->bytes(); | |
| 71 return make_scoped_ptr(resource); | |
| 72 } | |
| 73 | |
| 74 void ResourcePool::ReleaseResource( | |
| 75 scoped_ptr<ResourcePool::Resource> resource) { | |
| 76 if (memory_usage_bytes_ > max_memory_usage_bytes_) { | |
| 77 memory_usage_bytes_ -= resource->bytes(); | |
| 78 return; | |
| 79 } | |
| 80 | |
| 81 resources_.push_back(resource.release()); | |
| 82 } | |
| 83 | |
| 84 void ResourcePool::SetMaxMemoryUsageBytes(size_t max_memory_usage_bytes) { | |
| 85 max_memory_usage_bytes_ = max_memory_usage_bytes; | |
| 86 | |
| 87 while (!resources_.empty()) { | |
| 88 if (memory_usage_bytes_ <= max_memory_usage_bytes_) | |
| 89 break; | |
| 90 Resource* resource = resources_.front(); | |
| 91 resources_.pop_front(); | |
| 92 memory_usage_bytes_ -= resource->bytes(); | |
| 93 delete resource; | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 } // namespace cc | |
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Chromium Code Reviews
Issue 12471007:
Part 8 of cc/ directory shuffles: resources (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src