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/*-
* Copyright (c) 1998-1999 Shunsuke Akiyama <akiyama@jp.FreeBSD.org>.
* All rights reserved.
* Copyright (c) 1998-1999 X-TrueType Server Project, All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: fontcache.h,v 1.1.1.1 2000/02/22 15:40:34 kem Exp $
*/
#ifndef _FONTCACHE_H_
#define _FONTCACHE_H_
#include "fontmisc.h"
#include "fontstruct.h"
#include "fcqueue.h"
/* constant declarations */
#ifndef FC_DEFAULT_CACHE_SIZE
#define FC_DEFAULT_CACHE_SIZE 1024 /* in KB */
#endif
#define FC_CACHE_BALANCE 70 /* in percentage */
#define FC_BALANCE_LOW 10 /* in percentage */
#define FC_BALANCE_HI 90 /* in percentage */
#define FC_BALANCE_DIFFS 5 /* in percentage */
#define FC_SMALL_BITMAP_SIZE 128
#define FC_MEM_HASH_SIZE 256
#define FC_MEM_HASH_MASK (FC_MEM_HASH_SIZE - 1)
#define FC_PURGE_PER_SCAN 2
/* data type declarations */
struct cache_entry;
struct fcbitmap;
TAILQ_HEAD(fchash_head, cache_entry);
TAILQ_HEAD(fcmem_head, fcbitmap);
struct fcbitmap {
TAILQ_ENTRY(fcbitmap) b_hash;
struct cache_entry *b_entry;
int size;
int key;
};
struct fc_entry_vfuncs {
void (*f_private_dispose)(void *f_private);
};
struct cache_entry {
TAILQ_ENTRY(cache_entry) c_hash; /* Hash chain. */
TAILQ_ENTRY(cache_entry) c_lru; /* Font cache LRU list chain. */
struct fchash_head *c_head; /* Pointer to head. */
int key; /* hash key */
CharInfoRec charInfo; /* CharInfo record */
struct fcbitmap *bmp;
void *f_private; /* Font-specific private data */
struct fc_entry_vfuncs *vfuncs; /* virtual function table */
int bitmapsize; /* Bitmap size */
char bitmap[FC_SMALL_BITMAP_SIZE]; /* Small bitmap data area */
};
struct fchash {
int size;
int mask;
struct fchash_head *head;
};
struct fcmemhash {
int index;
struct fcmem_head head[FC_MEM_HASH_SIZE];
};
struct fc_cache_settings {
long himark;
long lowmark;
long balance;
};
struct fc_cache_stat {
long hits;
long misshits;
long purged;
long usage;
};
struct fc_cache_statistics {
long purge_runs;
long purge_stat;
long balance;
struct fc_cache_stat f;
struct fc_cache_stat v;
};
typedef struct fcbitmap FontCacheBitmap, *FontCacheBitmapPtr;
typedef struct cache_entry FontCacheEntry, *FontCacheEntryPtr;
typedef struct fchash_head FontCacheHead, *FontCacheHeadPtr;
typedef struct fcmem_head FontCacheBitmapHead, *FontCacheBitmapHeadPtr;
typedef struct fchash FCCB, *FCCBPtr;
typedef struct fcmemhash FCBCB, *FCBCBPtr;
typedef struct fc_cache_settings FontCacheSettings, *FontCacheSettingsPtr;
typedef struct fc_cache_statistics FontCacheStatistics, *FontCacheStatisticsPtr;
/* Function prototypes */
int FontCacheInitialize();
FCCBPtr FontCacheOpenCache(void * /* arg */);
void FontCacheCloseCache(FCCBPtr /* this */);
FontCacheEntryPtr FontCacheGetEntry();
int FontCacheSearchEntry(FCCBPtr /* this */, int /* key */,
FontCacheEntryPtr * /* value */);
int FontCacheInsertEntry(FCCBPtr /* this */, int /* key */,
FontCacheEntryPtr /* entry */);
int FontCacheGetBitmap(FontCacheEntryPtr /* entry */,
int /* size */);
int FontCacheChangeSettings(FontCacheSettingsPtr /* cinfo */);
void FontCacheGetSettings(FontCacheSettingsPtr /* cinfo */);
void FontCacheGetStatistics(FontCacheStatisticsPtr /* cstats */);
#endif /* _FONTCACHE_H_ */
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