static unsigned outline_compare(void *a, void *b, size_t key_size)
{
OutlineHashKey *ak = a;
OutlineHashKey *bk = b;
if (ak->type != bk->type) return 0;
switch (ak->type) {
case OUTLINE_GLYPH: return glyph_compare(&ak->u, &bk->u, key_size);
case OUTLINE_DRAWING: return drawing_compare(&ak->u, &bk->u, key_size);
default: return 0;
}
}
/**
* \brief Get a glyph from glyph cache.
* \param key hash key
* \return requested hash val or 0 if not found
*/
glyph_hash_val_t* cache_find_glyph(glyph_hash_key_t* key)
{
unsigned hash = glyph_hash(key);
glyph_hash_item_t* item = glyph_hash_root[hash % GLYPH_HASH_SIZE];
while (item) {
if (glyph_compare(key, &(item->key))) {
return &(item->val);
}
item = item->next;
}
return 0;
}
/**
* \brief Add a glyph to glyph cache.
* \param key hash key
* \param val hash val: 2 bitmap glyphs + some additional info
*/
void cache_add_glyph(glyph_hash_key_t* key, glyph_hash_val_t* val)
{
unsigned hash = glyph_hash(key);
glyph_hash_item_t** next = glyph_hash_root + (hash % GLYPH_HASH_SIZE);
while (*next) {
if (glyph_compare(key, &((*next)->key)))
return;
next = &((*next)->next);
assert(next);
}
(*next) = (glyph_hash_item_t*)malloc(sizeof(glyph_hash_item_t));
// (*next)->desc = glyph_key_copy(key, &((*next)->key));
memcpy(&((*next)->key), key, sizeof(glyph_hash_key_t));
memcpy(&((*next)->val), val, sizeof(glyph_hash_val_t));
(*next)->next = 0;
glyph_hash_size ++;
/* if (glyph_hash_size && (glyph_hash_size % 25 == 0)) {
printf("\nGlyph cache: %d entries, %d bytes\n", glyph_hash_size, glyph_hash_size * sizeof(glyph_hash_item_t));
} */
}
