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diff --git a/source/nds/bdf_font.h b/source/nds/bdf_font.h
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+/* bdf_font.h
+ *
+ * Copyright (C) 2010 dking <dking024@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licens e as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __BDF_FONT_H__
+#define __BDF_FONT_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct bdffont{
+    unsigned int dwidth;    //byte 3:2 x-distance; 1:0 y-distance
+    unsigned int bbx;       //byte 3 x-width; 2 y-height; 1 x-offset; 0 y-offset
+    unsigned char *bitmap;
+};
+
+struct bdflibinfo{
+    unsigned int width;
+    unsigned int height;
+    unsigned int start;
+    unsigned int span;
+    unsigned int maplen;
+    unsigned char *mapmem;
+    struct bdffont *fonts;
+};
+
+
+/*-----------------------------------------------------------------------------
+------------------------------------------------------------------------------*/
+extern int BDF_font_init(void);
+extern void BDF_render_string(void* screen_address, unsigned int x, unsigned int y, unsigned int back, 
+    unsigned int front, char *string);
+extern unsigned int BDF_render16_ucs(void* screen_address, unsigned int screen_w, 
+    unsigned int v_align, unsigned int back, unsigned int front, unsigned short ch);
+extern void BDF_render_mix(void* screen_address, unsigned int screen_w, unsigned int x, 
+    unsigned int y, unsigned int v_align, unsigned int back, unsigned int front, char *string);
+//extern unsigned int BDF_string_width(char *string, unsigned int *len);
+extern char* utf8decode(char *utf8, unsigned short *ucs);
+extern unsigned char* skip_utf8_unit(unsigned char* utf8, unsigned int num);
+extern unsigned int BDF_cut_unicode(unsigned short *unicodes, unsigned int len, unsigned int width, unsigned int direction);
+extern unsigned int BDF_cut_string(char *string, unsigned int width, unsigned int direction);
+extern void BDF_font_release(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //__BDF_FONT_H__