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// Copyright 2012 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_RESOURCES_RESOURCE_POOL_H_
#define CC_RESOURCES_RESOURCE_POOL_H_
#include <list>
#include "base/memory/scoped_ptr.h"
#include "cc/base/cc_export.h"
#include "cc/output/renderer.h"
#include "cc/resources/resource.h"
#include "cc/resources/resource_format.h"
namespace cc {
class ScopedResource;
class CC_EXPORT ResourcePool {
public:
static scoped_ptr<ResourcePool> Create(ResourceProvider* resource_provider,
GLenum target,
ResourceFormat format) {
return make_scoped_ptr(new ResourcePool(resource_provider, target, format));
}
virtual ~ResourcePool();
scoped_ptr<ScopedResource> AcquireResource(gfx::Size size);
void ReleaseResource(scoped_ptr<ScopedResource>);
void SetResourceUsageLimits(size_t max_memory_usage_bytes,
size_t max_unused_memory_usage_bytes,
size_t max_resource_count);
void ReduceResourceUsage();
void CheckBusyResources();
size_t total_memory_usage_bytes() const { return memory_usage_bytes_; }
size_t acquired_memory_usage_bytes() const {
return memory_usage_bytes_ - unused_memory_usage_bytes_;
}
size_t acquired_resource_count() const {
return resource_count_ - unused_resources_.size();
}
protected:
ResourcePool(ResourceProvider* resource_provider,
GLenum target,
ResourceFormat format);
bool ResourceUsageTooHigh();
private:
void DidFinishUsingResource(ScopedResource* resource);
ResourceProvider* resource_provider_;
const GLenum target_;
const ResourceFormat format_;
size_t max_memory_usage_bytes_;
size_t max_unused_memory_usage_bytes_;
size_t max_resource_count_;
size_t memory_usage_bytes_;
size_t unused_memory_usage_bytes_;
size_t resource_count_;
typedef std::list<ScopedResource*> ResourceList;
ResourceList unused_resources_;
ResourceList busy_resources_;
DISALLOW_COPY_AND_ASSIGN(ResourcePool);
};
} // namespace cc
#endif // CC_RESOURCES_RESOURCE_POOL_H_
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