jdk/src/share/native/sun/font/layout/GlyphSubstLookupProc.cpp
author prr
Thu, 07 Mar 2013 10:02:20 -0800
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permissions -rw-r--r--
8001031: Better font processing Reviewed-by: srl, vadim
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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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 * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
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 *
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 */
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#include "LETypes.h"
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#include "LEGlyphFilter.h"
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#include "LEFontInstance.h"
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#include "OpenTypeTables.h"
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#include "ICUFeatures.h"
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#include "Lookups.h"
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#include "ScriptAndLanguage.h"
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#include "GlyphDefinitionTables.h"
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#include "GlyphSubstitutionTables.h"
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#include "SingleSubstitutionSubtables.h"
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#include "MultipleSubstSubtables.h"
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#include "AlternateSubstSubtables.h"
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#include "LigatureSubstSubtables.h"
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#include "ContextualSubstSubtables.h"
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#include "ExtensionSubtables.h"
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#include "LookupProcessor.h"
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#include "GlyphSubstLookupProc.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor(
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        const LEReferenceTo<GlyphSubstitutionTableHeader> &glyphSubstitutionTableHeader,
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        LETag scriptTag,
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        LETag languageTag,
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        const LEGlyphFilter *filter,
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        const FeatureMap *featureMap,
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        le_int32 featureMapCount,
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        le_bool featureOrder,
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        LEErrorCode& success)
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    : LookupProcessor(
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                      glyphSubstitutionTableHeader,
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                      SWAPW(glyphSubstitutionTableHeader->scriptListOffset),
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                      SWAPW(glyphSubstitutionTableHeader->featureListOffset),
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                      SWAPW(glyphSubstitutionTableHeader->lookupListOffset),
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                      scriptTag, languageTag, featureMap, featureMapCount, featureOrder, success), fFilter(filter)
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{
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    // anything?
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}
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GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor()
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{
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}
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le_uint32 GlyphSubstitutionLookupProcessor::applySubtable(const LEReferenceTo<LookupSubtable> &lookupSubtable, le_uint16 lookupType,
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                                                       GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const
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{
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    if (LE_FAILURE(success)) {
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        return 0;
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    }
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    le_uint32 delta = 0;
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    switch(lookupType)
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    {
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    case 0:
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        break;
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    case gsstSingle:
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    {
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        const LEReferenceTo<SingleSubstitutionSubtable> subtable(lookupSubtable, success);
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        delta = subtable->process(subtable, glyphIterator, success, fFilter);
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        break;
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    }
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    case gsstMultiple:
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    {
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        const LEReferenceTo<MultipleSubstitutionSubtable> subtable(lookupSubtable, success);
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        delta = subtable->process(subtable, glyphIterator, success, fFilter);
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        break;
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    }
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    case gsstAlternate:
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    {
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        const LEReferenceTo<AlternateSubstitutionSubtable> subtable(lookupSubtable, success);
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        delta = subtable->process(subtable, glyphIterator, success, fFilter);
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        break;
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    }
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    case gsstLigature:
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    {
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        const LEReferenceTo<LigatureSubstitutionSubtable> subtable(lookupSubtable, success);
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        delta = subtable->process(subtable, glyphIterator, success, fFilter);
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        break;
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    }
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    case gsstContext:
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    {
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        const LEReferenceTo<ContextualSubstitutionSubtable> subtable(lookupSubtable, success);
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        delta = subtable->process(this, glyphIterator, fontInstance, success);
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        break;
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    }
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    case gsstChainingContext:
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    {
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        const LEReferenceTo<ChainingContextualSubstitutionSubtable> subtable(lookupSubtable, success);
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        delta = subtable->process(this, glyphIterator, fontInstance, success);
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        break;
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    }
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    case gsstExtension:
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    {
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        const LEReferenceTo<ExtensionSubtable> subtable(lookupSubtable, success);
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        delta = subtable->process(this, lookupType, glyphIterator, fontInstance, success);
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        break;
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    }
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    default:
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        break;
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    }
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    return delta;
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}
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GlyphSubstitutionLookupProcessor::~GlyphSubstitutionLookupProcessor()
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{
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}
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U_NAMESPACE_END