firmware/include/font_cache.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  *
   9  * Copyright (C) 2003 Tat Tang
  10  *
  11  * All files in this archive are subject to the GNU General Public License.
  12  * See the file COPYING in the source tree root for full license agreement.
  13  *
  14  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  15  * KIND, either express or implied.
  16  *
  17  ****************************************************************************/
  18
  19 #include "lru.h"
  20
  21 /*******************************************************************************
  22  *
  23  ******************************************************************************/
  24 struct font_cache
  25 {
  26     struct lru _lru;
  27     int _size;
  28     int _capacity;
  29     short *_index; /* index of lru handles in char_code order */
  30 };
  31
  32 struct font_cache_entry
  33 {
  34     unsigned short _char_code;
  35     unsigned char width;
  36     unsigned char bitmap[1]; /* place holder */
  37 };
  38
  39 /* void (*f) (void*, struct font_cache_entry*); */
  40 /* Create an auto sized font cache from buf */
  41 void font_cache_create(
  42     struct font_cache* fcache, void* buf, int buf_size, int bitmap_bytes_size);
  43 /* Get font cache entry */
  44 struct font_cache_entry* font_cache_get(
  45     struct font_cache* fcache,
  46     unsigned short char_code,
  47     void (*callback) (struct font_cache_entry* p, void *callback_data),
  48     void *callback_data);