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_outline.h"
26 #include "ass_bitmap.h"
28 typedef struct cache Cache;
34 Bitmap *bm; // the actual bitmaps
47 ASS_Outline border[2];
48 ASS_Rect bbox_scaled; // bbox after scaling, but before rotation
49 int advance; // 26.6, advance distance to the next outline in line
50 int asc, desc; // ascender/descender
54 FT_Glyph_Metrics metrics;
55 } GlyphMetricsHashValue;
57 // Create definitions for bitmap, outline and composite hash keys
58 #define CREATE_STRUCT_DEFINITIONS
59 #include "ass_cache_template.h"
61 // Type-specific function pointers
62 typedef uint32_t (*HashFunction)(void *key, uint32_t hval);
63 typedef bool (*HashCompare)(void *a, void *b);
64 typedef bool (*CacheKeyMove)(void *dst, void *src);
65 typedef size_t (*CacheValueConstructor)(void *key, void *value, void *priv);
66 typedef void (*CacheItemDestructor)(void *key, void *value);
70 typedef struct outline_hash_key {
77 DrawingHashKey drawing;
78 OutlineCommonKey common;
82 typedef struct bitmap_hash_key {
88 OutlineBitmapHashKey outline;
94 BitmapHashValue *image;
99 FILTER_BORDER_STYLE_3 = 1,
100 FILTER_NONZERO_BORDER = 2,
101 FILTER_NONZERO_SHADOW = 4,
102 FILTER_DRAW_SHADOW = 8, // VSFilter compatibility
113 HashFunction hash_func;
114 HashCompare compare_func;
115 CacheKeyMove key_move_func;
116 CacheValueConstructor construct_func;
117 CacheItemDestructor destruct_func;
122 Cache *ass_cache_create(const CacheDesc *desc);
123 void *ass_cache_get(Cache *cache, void *key, void *priv);
124 void *ass_cache_key(void *value);
125 void ass_cache_inc_ref(void *value);
126 void ass_cache_dec_ref(void *value);
127 void ass_cache_cut(Cache *cache, size_t max_size);
128 void ass_cache_stats(Cache *cache, size_t *size, unsigned *hits,
129 unsigned *misses, unsigned *count);
130 void ass_cache_empty(Cache *cache);
131 void ass_cache_done(Cache *cache);
132 Cache *ass_font_cache_create(void);
133 Cache *ass_outline_cache_create(void);
134 Cache *ass_glyph_metrics_cache_create(void);
135 Cache *ass_bitmap_cache_create(void);
136 Cache *ass_composite_cache_create(void);
138 #endif /* LIBASS_CACHE_H */