1 files changed, 59 insertions, 0 deletions
diff --git a/ui/app_list/icon_cache.h b/ui/app_list/icon_cache.h
new file mode 100644
index 0000000..75ffa067
--- /dev/null
+++ b/ui/app_list/icon_cache.h
@@ -0,0 +1,59 @@
+// Copyright (c) 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 UI_APP_LIST_ICON_CACHE_H_
+#define UI_APP_LIST_ICON_CACHE_H_
+#pragma once
+
+#include <map>
+#include <string>
+
+#include "base/basictypes.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/app_list/app_list_export.h"
+
+namespace gfx {
+class Size;
+}
+
+namespace app_list {
+
+// IconCache stores processed image, keyed by the source image and desired size.
+class APP_LIST_EXPORT IconCache {
+ public:
+  static void CreateInstance();
+  static void DeleteInstance();
+
+  static IconCache* GetInstance();
+
+  void MarkAllEntryUnused();
+  void PurgeAllUnused();
+
+  bool Get(const SkBitmap& src,
+           const gfx::Size& size,
+           SkBitmap* processed);
+  void Put(const SkBitmap& src,
+           const gfx::Size& size,
+           const SkBitmap& processed);
+
+ private:
+  struct Item {
+    SkBitmap image;
+    bool used;
+  };
+  typedef std::map<std::string, Item> Cache;
+
+  IconCache();
+  ~IconCache();
+
+  static IconCache* instance_;
+
+  Cache cache_;
+
+  DISALLOW_COPY_AND_ASSIGN(IconCache);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_ICON_CACHE_H_