2 * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
3 * Copyright (C) 2011 Grigori Goronzy <greg@chown.ath.cx>
5 * This file is part of libass.
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #ifndef LIBASS_CACHE_H
21 #define LIBASS_CACHE_H
25 #include "ass_bitmap.h"
27 typedef struct cache Cache;
29 // Create definitions for bitmap, glyph and composite hash keys
30 #define CREATE_STRUCT_DEFINITIONS
31 #include "ass_cache_template.h"
34 Bitmap *bm; // the actual bitmaps
46 FT_Glyph outline_glyph;
47 FT_BBox bbox_scaled; // bbox after scaling, but before rotation
48 FT_Vector advance; // 26.6, advance distance to the next bitmap in line
49 int asc, desc; // ascender/descender of a drawing
52 // Type-specific function pointers
53 typedef unsigned(*HashFunction)(void *key, size_t key_size);
54 typedef size_t(*ItemSize)(void *value, size_t value_size);
55 typedef unsigned(*HashCompare)(void *a, void *b, size_t key_size);
56 typedef void(*CacheItemDestructor)(void *key, void *value);
58 Cache *ass_cache_create(HashFunction hash_func, HashCompare compare_func,
59 CacheItemDestructor destruct_func, ItemSize size_func,
60 size_t key_size, size_t value_size);
61 void *ass_cache_put(Cache *cache, void *key, void *value);
62 void *ass_cache_get(Cache *cache, void *key);
63 size_t ass_cache_empty(Cache *cache, size_t max_size);
64 void ass_cache_stats(Cache *cache, size_t *size, unsigned *hits,
65 unsigned *misses, unsigned *count);
66 void ass_cache_done(Cache *cache);
67 Cache *ass_font_cache_create(void);
68 Cache *ass_glyph_cache_create(void);
69 Cache *ass_bitmap_cache_create(void);
70 Cache *ass_composite_cache_create(void);
72 #endif /* LIBASS_CACHE_H */