100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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**********************************************************************
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* Copyright (C) 2003-2013, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#include "layout/LETypes.h"
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//#include "letest.h"
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#include "FontTableCache.h"
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#define TABLE_CACHE_INIT 5
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#define TABLE_CACHE_GROW 5
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struct FontTableCacheEntry
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{
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LETag tag;
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const void *table;
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size_t length;
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};
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FontTableCache::FontTableCache()
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: fTableCacheCurr(0), fTableCacheSize(TABLE_CACHE_INIT)
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{
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fTableCache = LE_NEW_ARRAY(FontTableCacheEntry, fTableCacheSize);
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if (fTableCache == NULL) {
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fTableCacheSize = 0;
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return;
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}
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for (int i = 0; i < fTableCacheSize; i += 1) {
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fTableCache[i].tag = 0;
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fTableCache[i].table = NULL;
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fTableCache[i].length = 0;
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}
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}
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FontTableCache::~FontTableCache()
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{
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for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) {
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LE_DELETE_ARRAY(fTableCache[i].table);
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fTableCache[i].tag = 0;
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fTableCache[i].table = NULL;
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fTableCache[i].length = 0;
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}
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fTableCacheCurr = 0;
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LE_DELETE_ARRAY(fTableCache);
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}
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void FontTableCache::freeFontTable(const void *table) const
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{
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LE_DELETE_ARRAY(table);
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}
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const void *FontTableCache::find(LETag tableTag, size_t &length) const
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{
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for (int i = 0; i < fTableCacheCurr; i += 1) {
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if (fTableCache[i].tag == tableTag) {
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length = fTableCache[i].length;
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return fTableCache[i].table;
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}
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}
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const void *table = readFontTable(tableTag, length);
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((FontTableCache *) this)->add(tableTag, table, length);
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return table;
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}
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void FontTableCache::add(LETag tableTag, const void *table, size_t length)
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{
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if (fTableCacheCurr >= fTableCacheSize) {
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le_int32 newSize = fTableCacheSize + TABLE_CACHE_GROW;
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fTableCache = (FontTableCacheEntry *) LE_GROW_ARRAY(fTableCache, newSize);
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for (le_int32 i = fTableCacheSize; i < newSize; i += 1) {
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fTableCache[i].tag = 0;
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fTableCache[i].table = NULL;
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fTableCache[i].length = 0;
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}
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fTableCacheSize = newSize;
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}
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fTableCache[fTableCacheCurr].tag = tableTag;
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fTableCache[fTableCacheCurr].table = table;
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fTableCache[fTableCacheCurr].length = length;
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fTableCacheCurr += 1;
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}
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