/* * HanLayoutEngine.cpp: OpenType processing for Han fonts. * * (C) Copyright IBM Corp. 1998-2013 - 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