2 **********************************************************************
3 * Copyright (C) 2003-2008, International Business Machines
4 * Corporation and others. All Rights Reserved.
5 **********************************************************************
8 #include "layout/LETypes.h"
11 #include "FontTableCache.h"
13 #define TABLE_CACHE_INIT 5
14 #define TABLE_CACHE_GROW 5
16 struct FontTableCacheEntry
22 FontTableCache::FontTableCache()
23 : fTableCacheCurr(0), fTableCacheSize(TABLE_CACHE_INIT)
25 fTableCache = NEW_ARRAY(FontTableCacheEntry, fTableCacheSize);
27 if (fTableCache == NULL) {
32 for (int i = 0; i < fTableCacheSize; i += 1) {
33 fTableCache[i].tag = 0;
34 fTableCache[i].blob = NULL;
38 FontTableCache::~FontTableCache()
40 for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) {
41 hb_blob_destroy(fTableCache[i].blob);
43 fTableCache[i].tag = 0;
44 fTableCache[i].blob = NULL;
49 DELETE_ARRAY(fTableCache);
52 void FontTableCache::freeFontTable(hb_blob_t *blob) const
54 hb_blob_destroy(blob);
57 const void *FontTableCache::find(LETag tableTag) const
59 for (int i = 0; i < fTableCacheCurr; i += 1) {
60 if (fTableCache[i].tag == tableTag) {
61 return hb_blob_get_data(fTableCache[i].blob, NULL);
65 hb_blob_t *blob = readFontTable(tableTag);
67 ((FontTableCache *) this)->add(tableTag, blob);
69 return hb_blob_get_data (blob, NULL);
72 void FontTableCache::add(LETag tableTag, hb_blob_t *blob)
74 if (fTableCacheCurr >= fTableCacheSize) {
75 le_int32 newSize = fTableCacheSize + TABLE_CACHE_GROW;
77 fTableCache = (FontTableCacheEntry *) GROW_ARRAY(fTableCache, newSize);
79 for (le_int32 i = fTableCacheSize; i < newSize; i += 1) {
80 fTableCache[i].tag = 0;
81 fTableCache[i].blob = NULL;
84 fTableCacheSize = newSize;
87 fTableCache[fTableCacheCurr].tag = tableTag;
88 fTableCache[fTableCacheCurr].blob = blob;