UI Resource Manager

cc/resources/scoped_ui_resource.h

+// 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/base/cc_export.h"
+#include "cc/resources/ui_resource_bitmap.h"
+#include "cc/resources/ui_resource_client.h"
+#include "ui/gfx/size.h"
+
+namespace cc {
+
+class LayerTreeHost;
+
+class CC_EXPORT ScopedUIResource : public UIResourceClient {
+ public:
+  static scoped_ptr<ScopedUIResource> Create(
+      LayerTreeHost* host,
+      scoped_refptr<UIResourceBitmap> bitmap);
+  virtual ~ScopedUIResource();
+
+  virtual scoped_refptr<UIResourceBitmap> GetBitmap(
+      UIResourceId uid,
+      bool resource_lost) OVERRIDE;
+  UIResourceId id() { return id_; }
+
+ protected:
+  ScopedUIResource(LayerTreeHost* host, scoped_refptr<UIResourceBitmap> bitmap);
+
+  // An empty default contructor for testing.
+  ScopedUIResource();
+
+  scoped_refptr<UIResourceBitmap> bitmap_;
+  LayerTreeHost* host_;
+  UIResourceId id_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedUIResource);
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_SCOPED_UI_RESOURCE_H_