/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 *

 */

/*

 * HanLayoutEngine.cpp: OpenType processing for Han fonts.

 *

 * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved.

 */

#include "LETypes.h"

#include "LEScripts.h"

#include "LELanguages.h"

#include "LayoutEngine.h"

#include "OpenTypeLayoutEngine.h"

#include "HanLayoutEngine.h"

#include "ScriptAndLanguageTags.h"

#include "LEGlyphStorage.h"

#include "OpenTypeTables.h"

U_NAMESPACE_BEGIN

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(HanOpenTypeLayoutEngine)

#define loclFeatureTag LE_LOCL_FEATURE_TAG

#define smplFeatureTag LE_SMPL_FEATURE_TAG

#define tradFeatureTag LE_TRAD_FEATURE_TAG

#define loclFeatureMask 0x80000000UL

#define smplFeatureMask 0x40000000UL

#define tradFeatureMask 0x20000000UL

static const FeatureMap featureMap[] =

{

    {loclFeatureTag, loclFeatureMask},

    {smplFeatureTag, smplFeatureMask},

    {tradFeatureTag, tradFeatureMask}

};

static const le_int32 featureMapCount = LE_ARRAY_SIZE(featureMap);

#define features (loclFeatureMask)

HanOpenTypeLayoutEngine::HanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,

                        le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable)

    : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable)

{

    fFeatureMap      = featureMap;

    fFeatureMapCount = featureMapCount;

}

HanOpenTypeLayoutEngine::~HanOpenTypeLayoutEngine()

{

    // nothing to do

}

le_int32 HanOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool /*rightToLeft*/,

        LEUnicode *&/*outChars*/, LEGlyphStorage &glyphStorage, LEErrorCode &success)

{

    if (LE_FAILURE(success)) {

        return 0;

    }

    if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {

        success = LE_ILLEGAL_ARGUMENT_ERROR;

        return 0;

    }

    glyphStorage.allocateGlyphArray(count, FALSE, success);

    glyphStorage.allocateAuxData(success);

    if (LE_FAILURE(success)) {

        return 0;

    }

    // FIXME: do we want to add the 'trad' feature for 'ZHT' and the

    // 'smpl' feature for 'ZHS'? If we do this, we can remove the exact

    // flag from the language tag lookups, so we can use these features

    // with the default LangSys...

    for (le_int32 i = 0; i < count; i += 1) {

        glyphStorage.setAuxData(i, features, success);

    }

    return count;

}

U_NAMESPACE_END