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/*
* 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
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/*
* HanLayoutEngine.cpp: OpenType processing for Han fonts.
*
* (C) Copyright IBM Corp. 1998-2008 - 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 LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success)
: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success)
{
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
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