117 lines
4.1 KiB
C
117 lines
4.1 KiB
C
/*
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* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
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*
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* This file is part of libass.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef LIBASS_CACHE_H
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#define LIBASS_CACHE_H
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#include "ass.h"
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#include "ass_font.h"
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#include "ass_bitmap.h"
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typedef void (*HashmapItemDtor) (void *key, size_t key_size,
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void *value, size_t value_size);
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typedef int (*HashmapKeyCompare) (void *key1, void *key2,
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size_t key_size);
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typedef unsigned (*HashmapHash) (void *key, size_t key_size);
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typedef struct hashmap_item {
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void *key;
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void *value;
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struct hashmap_item *next;
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} HashmapItem;
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typedef HashmapItem *hashmap_item_p;
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typedef struct {
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int nbuckets;
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size_t key_size, value_size;
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hashmap_item_p *root;
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HashmapItemDtor item_dtor; // a destructor for hashmap key/value pairs
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HashmapKeyCompare key_compare;
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HashmapHash hash;
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size_t cache_size;
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// stats
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int hit_count;
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int miss_count;
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int count;
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ASS_Library *library;
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} Hashmap;
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Hashmap *hashmap_init(ASS_Library *library, size_t key_size,
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size_t value_size, int nbuckets,
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HashmapItemDtor item_dtor,
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HashmapKeyCompare key_compare,
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HashmapHash hash);
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void hashmap_done(Hashmap *map);
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void *hashmap_insert(Hashmap *map, void *key, void *value);
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void *hashmap_find(Hashmap *map, void *key);
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Hashmap *ass_font_cache_init(ASS_Library *library);
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ASS_Font *ass_font_cache_find(Hashmap *, ASS_FontDesc *desc);
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void *ass_font_cache_add(Hashmap *, ASS_Font *font);
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void ass_font_cache_done(Hashmap *);
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// Create definitions for bitmap_hash_key and glyph_hash_key
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#define CREATE_STRUCT_DEFINITIONS
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#include "ass_cache_template.h"
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typedef struct {
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Bitmap *bm; // the actual bitmaps
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Bitmap *bm_o;
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Bitmap *bm_s;
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} BitmapHashValue;
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Hashmap *ass_bitmap_cache_init(ASS_Library *library);
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void *cache_add_bitmap(Hashmap *, BitmapHashKey *key,
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BitmapHashValue *val);
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BitmapHashValue *cache_find_bitmap(Hashmap *bitmap_cache,
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BitmapHashKey *key);
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Hashmap *ass_bitmap_cache_reset(Hashmap *bitmap_cache);
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void ass_bitmap_cache_done(Hashmap *bitmap_cache);
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typedef struct {
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unsigned char *a;
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unsigned char *b;
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} CompositeHashValue;
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Hashmap *ass_composite_cache_init(ASS_Library *library);
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void *cache_add_composite(Hashmap *, CompositeHashKey *key,
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CompositeHashValue *val);
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CompositeHashValue *cache_find_composite(Hashmap *composite_cache,
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CompositeHashKey *key);
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Hashmap *ass_composite_cache_reset(Hashmap *composite_cache);
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void ass_composite_cache_done(Hashmap *composite_cache);
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typedef struct {
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FT_Glyph glyph;
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FT_Glyph outline_glyph;
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FT_BBox bbox_scaled; // bbox after scaling, but before rotation
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FT_Vector advance; // 26.6, advance distance to the next bitmap in line
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int asc, desc; // ascender/descender of a drawing
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} GlyphHashValue;
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Hashmap *ass_glyph_cache_init(ASS_Library *library);
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void *cache_add_glyph(Hashmap *, GlyphHashKey *key,
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GlyphHashValue *val);
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GlyphHashValue *cache_find_glyph(Hashmap *glyph_cache,
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GlyphHashKey *key);
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Hashmap *ass_glyph_cache_reset(Hashmap *glyph_cache);
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void ass_glyph_cache_done(Hashmap *glyph_cache);
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#endif /* LIBASS_CACHE_H */
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