1 files changed, 48 insertions, 0 deletions

diff --git a/firmware/include/font_cache.h b/firmware/include/font_cache.h
new file mode 100644
index 0000000000..813cd18987
--- /dev/null
+++ b/firmware/include/font_cache.h
@@ -0,0 +1,48 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2003 Tat Tang
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "lru.h"
+
+/*******************************************************************************
+ * 
+ ******************************************************************************/
+struct font_cache
+{
+    struct lru _lru;
+    int _size;
+    int _capacity;
+    short *_index; /* index of lru handles in char_code order */
+};
+
+struct font_cache_entry
+{
+    unsigned short _char_code;
+    unsigned char width;
+    unsigned char bitmap[1]; /* place holder */
+};
+
+/* void (*f) (void*, struct font_cache_entry*); */
+/* Create an auto sized font cache from buf */
+void font_cache_create(
+    struct font_cache* fcache, void* buf, int buf_size, int bitmap_bytes_size);
+/* Get font cache entry */
+struct font_cache_entry* font_cache_get(
+    struct font_cache* fcache,
+    unsigned short char_code,
+    void (*callback) (struct font_cache_entry* p, void *callback_data),
+    void *callback_data);