/* ************************************************************************* * © 2016 and later: Unicode, Inc. and others. * License & terms of use: http://www.unicode.org/copyright.html#License ************************************************************************* ************************************************************************* * Copyright (C) 2003 - 2008, International Business Machines * Corporation and others. All Rights Reserved. ************************************************************************* */ #include "layout/LETypes.h" #include "FontTableCache.h" #define TABLE_CACHE_INIT 5 #define TABLE_CACHE_GROW 5 struct FontTableCacheEntry { LETag tag; const void *table; }; FontTableCache::FontTableCache() : fTableCacheCurr(0), fTableCacheSize(TABLE_CACHE_INIT) { fTableCache = LE_NEW_ARRAY(FontTableCacheEntry, fTableCacheSize); if (fTableCache == NULL) { fTableCacheSize = 0; return; } for (int i = 0; i < fTableCacheSize; i += 1) { fTableCache[i].tag = 0; fTableCache[i].table = NULL; } } FontTableCache::~FontTableCache() { for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) { freeFontTable(fTableCache[i].table); fTableCache[i].tag = 0; fTableCache[i].table = NULL; } fTableCacheCurr = 0; LE_DELETE_ARRAY(fTableCache); fTableCache = NULL; } void FontTableCache::freeFontTable(const void *table) const { LE_DELETE_ARRAY(table); } const void *FontTableCache::find(LETag tableTag) const { for (int i = 0; i < fTableCacheCurr; i += 1) { if (fTableCache[i].tag == tableTag) { return fTableCache[i].table; } } const void *table = readFontTable(tableTag); ((FontTableCache *) this)->add(tableTag, table); return table; } void FontTableCache::add(LETag tableTag, const void *table) { if (fTableCacheCurr >= fTableCacheSize) { le_int32 newSize = fTableCacheSize + TABLE_CACHE_GROW; fTableCache = (FontTableCacheEntry *) LE_GROW_ARRAY(fTableCache, newSize); for (le_int32 i = fTableCacheSize; i < newSize; i += 1) { fTableCache[i].tag = 0; fTableCache[i].table = NULL; } fTableCacheSize = newSize; } fTableCache[fTableCacheCurr].tag = tableTag; fTableCache[fTableCacheCurr].table = table; fTableCacheCurr += 1; }