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diff --git a/src/libs/threadimageio/loadingcacheinterface.h b/src/libs/threadimageio/loadingcacheinterface.h
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2006-02-06
+ * Description : shared image loading and caching
+ *
+ * Copyright (C) 2005-2007 by Marcel Wiesweg <[email protected]>
+ *
+ * This program is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU General
+ * Public License as published by the Free Software Foundation;
+ * either version 2, or (at your option)
+ * any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * ============================================================ */
+
+#ifndef LOADING_CACHE_INTERFACE_H
+#define LOADING_CACHE_INTERFACE_H
+
+#include <tqstring.h>
+
+#include "digikam_export.h"
+#include "dimg.h"
+
+namespace Digikam
+{
+
+class DIGIKAM_EXPORT LoadingCacheInterface
+{
+public:
+    // clean up cache at shutdown
+    static void cleanUp();
+    // remove an image from the cache
+    // (e.g. when image has changed on disk)
+    static void cleanFromCache(const TQString &filePath);
+    // remove all images from the cache
+    // (e.g. when loading settings changed)
+    static void cleanCache();
+    // add a copy of the image to cache
+    static void putImage(const TQString &filePath, const DImg &img);
+    // Set cache size in Megabytes.
+    // Set to 0 to disable caching.
+    static void setCacheOptions(int cacheSize);
+};
+
+}   // namespace Digikam
+
+#endif
+