1 /*
2 **************************************************************************
3 * © 2016 and later: Unicode, Inc. and others.
4 * License & terms of use: http://www.unicode.org/copyright.html
5 *************************************************************************
6 *************************************************************************
7 * Copyright (C) 2003-2013, International Business Machines
8 * Corporation and others. All Rights Reserved.
9 *************************************************************************
10 */
11
12 #include "layout/LETypes.h"
13
14 //#include "letest.h"
15 #include "FontTableCache.h"
16
17 #define TABLE_CACHE_INIT 5
18 #define TABLE_CACHE_GROW 5
19
20 struct FontTableCacheEntry
21 {
22 LETag tag;
23 const void *table;
24 size_t length;
25 };
26
FontTableCache()27 FontTableCache::FontTableCache()
28 : fTableCacheCurr(0), fTableCacheSize(TABLE_CACHE_INIT)
29 {
30 fTableCache = LE_NEW_ARRAY(FontTableCacheEntry, fTableCacheSize);
31
32 if (fTableCache == NULL) {
33 fTableCacheSize = 0;
34 return;
35 }
36
37 for (int i = 0; i < fTableCacheSize; i += 1) {
38 fTableCache[i].tag = 0;
39 fTableCache[i].table = NULL;
40 fTableCache[i].length = 0;
41 }
42 }
43
~FontTableCache()44 FontTableCache::~FontTableCache()
45 {
46 for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) {
47 LE_DELETE_ARRAY(fTableCache[i].table);
48
49 fTableCache[i].tag = 0;
50 fTableCache[i].table = NULL;
51 fTableCache[i].length = 0;
52 }
53
54 fTableCacheCurr = 0;
55
56 LE_DELETE_ARRAY(fTableCache);
57 }
58
freeFontTable(const void * table) const59 void FontTableCache::freeFontTable(const void *table) const
60 {
61 LE_DELETE_ARRAY(table);
62 }
63
find(LETag tableTag,size_t & length) const64 const void *FontTableCache::find(LETag tableTag, size_t &length) const
65 {
66 for (int i = 0; i < fTableCacheCurr; i += 1) {
67 if (fTableCache[i].tag == tableTag) {
68 length = fTableCache[i].length;
69 return fTableCache[i].table;
70 }
71 }
72
73 const void *table = readFontTable(tableTag, length);
74
75 ((FontTableCache *) this)->add(tableTag, table, length);
76
77 return table;
78 }
79
add(LETag tableTag,const void * table,size_t length)80 void FontTableCache::add(LETag tableTag, const void *table, size_t length)
81 {
82 if (fTableCacheCurr >= fTableCacheSize) {
83 le_int32 newSize = fTableCacheSize + TABLE_CACHE_GROW;
84
85 fTableCache = (FontTableCacheEntry *) LE_GROW_ARRAY(fTableCache, newSize);
86
87 for (le_int32 i = fTableCacheSize; i < newSize; i += 1) {
88 fTableCache[i].tag = 0;
89 fTableCache[i].table = NULL;
90 fTableCache[i].length = 0;
91 }
92
93 fTableCacheSize = newSize;
94 }
95
96 fTableCache[fTableCacheCurr].tag = tableTag;
97 fTableCache[fTableCacheCurr].table = table;
98 fTableCache[fTableCacheCurr].length = length;
99
100 fTableCacheCurr += 1;
101 }
102