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;
32 Bitmap *bm; // the actual bitmaps
46 FT_BBox bbox_scaled; // bbox after scaling, but before rotation
47 FT_Vector advance; // 26.6, advance distance to the next outline in line
48 int asc, desc; // ascender/descender
52 FT_Glyph_Metrics metrics;
53 } GlyphMetricsHashValue;
55 // Create definitions for bitmap, outline and composite hash keys
56 #define CREATE_STRUCT_DEFINITIONS
57 #include "ass_cache_template.h"
59 // Type-specific function pointers
60 typedef unsigned(*HashFunction)(void *key, size_t key_size);
61 typedef size_t(*ItemSize)(void *value, size_t value_size);
62 typedef unsigned(*HashCompare)(void *a, void *b, size_t key_size);
63 typedef void(*CacheItemDestructor)(void *key, void *value);
67 typedef struct outline_hash_key {
74 DrawingHashKey drawing;
78 typedef struct bitmap_hash_key {
84 OutlineBitmapHashKey outline;
89 Cache *ass_cache_create(HashFunction hash_func, HashCompare compare_func,
90 CacheItemDestructor destruct_func, ItemSize size_func,
91 size_t key_size, size_t value_size);
92 void *ass_cache_put(Cache *cache, void *key, void *value);
93 void *ass_cache_get(Cache *cache, void *key);
94 int ass_cache_empty(Cache *cache, size_t max_size);
95 void ass_cache_stats(Cache *cache, size_t *size, unsigned *hits,
96 unsigned *misses, unsigned *count);
97 void ass_cache_done(Cache *cache);
98 Cache *ass_font_cache_create(void);
99 Cache *ass_outline_cache_create(void);
100 Cache *ass_glyph_metrics_cache_create(void);
101 Cache *ass_bitmap_cache_create(void);
102 Cache *ass_composite_cache_create(void);
104 #endif /* LIBASS_CACHE_H */