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diff --git a/apps/plugins/text_viewer/tv_text_processor.h b/apps/plugins/text_viewer/tv_text_processor.h
new file mode 100644
index 0000000000..3cb2a96448
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+++ b/apps/plugins/text_viewer/tv_text_processor.h
@@ -0,0 +1,80 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Gilles Roux
+ *               2003 Garrett Derner
+ *               2010 Yoshihisa Uchida
+ *
+ * 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
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef PLUGIN_TEXT_VIEWER_TEXT_PROCESSOR_H
+#define PLUGIN_TEXT_VIEWER_TEXT_PROCESSOR_H
+
+/*
+ * initialize the text processor module
+ *
+ * [In] buf
+ *          the start pointer of the buffer
+ *
+ * [In] size
+ *          enabled buffer size
+ *
+ * [Out] used_size
+ *          the size of the buffer which the pager uses
+ *
+ * return
+ *     true  initialize success
+ *     false initialize failure
+ */
+bool tv_init_text_processor(unsigned char *buf, size_t bufsize, size_t *used_size);
+
+/*
+ * set the processing conditions
+ *
+ * [In] blocks
+ *          total block count
+ *
+ * [In] width
+ *          the block width
+ */
+void tv_set_creation_conditions(int blocks, int width);
+
+/*
+ * create the displayed text
+ *
+ * [In] src
+ *          the start pointer of the buffer
+ *
+ * [In] bufsize
+ *          buffer size
+ *
+ * [In] block
+ *          the index of block to read text
+ *
+ * [In] is_multi
+ *          true  read 2 blocks
+ *          false read 1 block
+ *
+ * [Out] dst
+ *          the pointer of the pointer which store the text
+ *
+ * return
+ *     the size of the text
+ */
+int tv_create_formed_text(const unsigned char *src, ssize_t bufsize,
+                              int block, bool is_multi, const unsigned char **dst);
+
+#endif