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/*
* 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, NULL, success);
}
return count;
}
U_NAMESPACE_END
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