libass/ass_cache.h

   1 // -*- c-basic-offset: 8; indent-tabs-mode: t -*-
   2 // vim:ts=8:sw=8:noet:ai:
   3 /*
   4  * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
   5  *
   6  * This file is part of libass.
   7  *
   8  * libass is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * libass is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with libass; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #ifndef LIBASS_CACHE_H
  24 #define LIBASS_CACHE_H
  25
  26 #include "ass.h"
  27 #include "ass_font.h"
  28 #include "ass_bitmap.h"
  29
  30 void ass_font_cache_init(void);
  31 ass_font_t* ass_font_cache_find(ass_font_desc_t* desc);
  32 void* ass_font_cache_add(ass_font_t* font);
  33 void ass_font_cache_done(void);
  34
  35
  36 // Create definitions for bitmap_hash_key and glyph_hash_key
  37 #define CREATE_STRUCT_DEFINITIONS
  38 #include "ass_cache_template.c"
  39
  40 typedef struct bitmap_hash_val_s {
  41         bitmap_t* bm; // the actual bitmaps
  42         bitmap_t* bm_o;
  43         bitmap_t* bm_s;
  44 } bitmap_hash_val_t;
  45
  46 void ass_bitmap_cache_init(void);
  47 void* cache_add_bitmap(bitmap_hash_key_t* key, bitmap_hash_val_t* val);
  48 bitmap_hash_val_t* cache_find_bitmap(bitmap_hash_key_t* key);
  49 void ass_bitmap_cache_reset(void);
  50 void ass_bitmap_cache_done(void);
  51
  52
  53 // Cache for composited bitmaps
  54 typedef struct composite_hash_key_s {
  55         int aw, ah, bw, bh;
  56         int ax, ay, bx, by;
  57         bitmap_hash_key_t a;
  58         bitmap_hash_key_t b;
  59 } composite_hash_key_t;
  60
  61 typedef struct composite_hash_val_s {
  62         unsigned char* a;
  63         unsigned char* b;
  64 } composite_hash_val_t;
  65
  66 void ass_composite_cache_init(void);
  67 void* cache_add_composite(composite_hash_key_t* key, composite_hash_val_t* val);
  68 composite_hash_val_t* cache_find_composite(composite_hash_key_t* key);
  69 void ass_composite_cache_reset(void);
  70 void ass_composite_cache_done(void);
  71
  72
  73 typedef struct glyph_hash_val_s {
  74         FT_Glyph glyph;
  75         FT_Glyph outline_glyph;
  76         FT_BBox bbox_scaled; // bbox after scaling, but before rotation
  77         FT_Vector advance; // 26.6, advance distance to the next bitmap in line
  78 } glyph_hash_val_t;
  79
  80 void ass_glyph_cache_init(void);
  81 void* cache_add_glyph(glyph_hash_key_t* key, glyph_hash_val_t* val);
  82 glyph_hash_val_t* cache_find_glyph(glyph_hash_key_t* key);
  83 void ass_glyph_cache_reset(void);
  84 void ass_glyph_cache_done(void);
  85
  86 typedef struct hashmap_s hashmap_t;
  87 typedef void (*hashmap_item_dtor_t)(void* key, size_t key_size, void* value, size_t value_size);
  88 typedef int (*hashmap_key_compare_t)(void* key1, void* key2, size_t key_size);
  89 typedef unsigned (*hashmap_hash_t)(void* key, size_t key_size);
  90
  91 hashmap_t* hashmap_init(size_t key_size, size_t value_size, int nbuckets,
  92                         hashmap_item_dtor_t item_dtor, hashmap_key_compare_t key_compare,
  93                         hashmap_hash_t hash);
  94 void hashmap_done(hashmap_t* map);
  95 void* hashmap_insert(hashmap_t* map, void* key, void* value);
  96 void* hashmap_find(hashmap_t* map, void* key);
  97
  98 #endif /* LIBASS_CACHE_H */