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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright (C) 2003 Tat Tang
*
* 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 _FONT_CACHE_H_
#define _FONT_CACHE_H_
#include <stdbool.h>
#include "lru.h"
/*******************************************************************************
*
******************************************************************************/
struct font_cache
{
struct lru _lru;
int _size;
int _capacity;
int _prev_char_code;
int _prev_result;
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 for the given char_code
*
* cache_only: true if only a cache lookup should be performed and loading on miss should be avoided
*
* Note: With cache_only this can return NULL, which otherwise never happens */
struct font_cache_entry* font_cache_get(
struct font_cache* fcache,
unsigned short char_code,
bool cache_only,
void (*callback) (struct font_cache_entry* p, void *callback_data),
void *callback_data);
#endif
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