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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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/*
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*
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*
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* (C) Copyright IBM Corp. 2002 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "OpenTypeTables.h"
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#include "GlyphSubstitutionTables.h"
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#include "LookupProcessor.h"
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#include "ExtensionSubtables.h"
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#include "GlyphIterator.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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// read a 32-bit value that might only be 16-bit-aligned in memory
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#define READ_LONG(code) (le_uint32)((SWAPW(*(le_uint16*)&code) << 16) + SWAPW(*(((le_uint16*)&code) + 1)))
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// FIXME: should look at the format too... maybe have a sub-class for it?
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le_uint32 ExtensionSubtable::process(const LookupProcessor *lookupProcessor, le_uint16 lookupType,
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GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const
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{
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const LEReferenceTo<ExtensionSubtable> thisRef(lookupProcessor->getReference(), success); // create a reference to this
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if (LE_FAILURE(success)) {
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return 0;
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}
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le_uint16 elt = SWAPW(extensionLookupType);
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if (elt != lookupType) {
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le_uint32 extOffset = READ_LONG(extensionOffset);
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LEReferenceTo<LookupSubtable> subtable(thisRef, success, extOffset);
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if(LE_SUCCESS(success)) {
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return lookupProcessor->applySubtable(subtable, elt, glyphIterator, fontInstance, success);
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}
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}
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return 0;
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}
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U_NAMESPACE_END
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