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// Copyright 2013 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_SCOPED_UI_RESOURCE_H_
#define CC_RESOURCES_SCOPED_UI_RESOURCE_H_
#include "base/memory/ref_counted.h"
#include "cc/cc_export.h"
#include "cc/resources/ui_resource_bitmap.h"
#include "cc/resources/ui_resource_client.h"
namespace cc {
class UIResourceManager;
// ScopedUIResource creates an UIResource from a bitmap and a LayerTreeHost.
// This class holds a pointer to the host so that when the instance goes out of
// scope, the created resource is deleted. On a GetBitmap call from the
// UIResource manager, ScopeUIResource always returns the reference to the
// initially given bitmap regardless of whether the request was due to lost
// resource or not.
class CC_EXPORT ScopedUIResource : public UIResourceClient {
public:
static std::unique_ptr<ScopedUIResource> Create(
UIResourceManager* ui_resource_manager,
const UIResourceBitmap& bitmap);
ScopedUIResource(const ScopedUIResource&) = delete;
~ScopedUIResource() override;
ScopedUIResource& operator=(const ScopedUIResource&) = delete;
// UIResourceClient implementation.
UIResourceBitmap GetBitmap(UIResourceId uid, bool resource_lost) override;
UIResourceId id() { return id_; }
// Returns the memory usage of the bitmap.
size_t EstimateMemoryUsage() const { return bitmap_.SizeInBytes(); }
protected:
ScopedUIResource(UIResourceManager* ui_resource_manager,
const UIResourceBitmap& bitmap);
UIResourceBitmap bitmap_;
UIResourceManager* ui_resource_manager_;
UIResourceId id_;
};
} // namespace cc
#endif // CC_RESOURCES_SCOPED_UI_RESOURCE_H_