| /* |
| * HanLayoutEngine.cpp: OpenType processing for Han fonts. |
| * |
| * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved. |
| * |
| * $Source: /xsrl/Nsvn/icu/icu/source/layout/HanLayoutEngine.cpp,v $ $Date: 2003/06/03 20:58:21 $ $Revision: 1.4 $ |
| */ |
| |
| #include "LETypes.h" |
| #include "LEScripts.h" |
| #include "LELanguages.h" |
| |
| #include "LayoutEngine.h" |
| #include "OpenTypeLayoutEngine.h" |
| #include "HanLayoutEngine.h" |
| #include "ScriptAndLanguageTags.h" |
| |
| const char HanOpenTypeLayoutEngine::fgClassID=0; |
| |
| HanOpenTypeLayoutEngine::HanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, |
| const GlyphSubstitutionTableHeader *gsubTable) |
| : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable) |
| { |
| // nothing else to do... |
| } |
| |
| HanOpenTypeLayoutEngine::~HanOpenTypeLayoutEngine() |
| { |
| // nothing to do |
| } |
| |
| const LETag emptyTag = 0x00000000; |
| |
| const LETag loclFeatureTag = LE_LOCL_FEATURE_TAG; |
| const LETag smplFeatureTag = LE_SMPL_FEATURE_TAG; |
| const LETag tradFeatureTag = LE_TRAD_FEATURE_TAG; |
| |
| const LETag features[] = {loclFeatureTag, emptyTag}; |
| |
| le_int32 HanOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool /*rightToLeft*/, |
| LEUnicode *&/*outChars*/, le_int32 *&/*charIndices*/, const LETag **&featureTags, 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; |
| } |
| |
| featureTags = LE_NEW_ARRAY(const LETag *, count); |
| |
| if (featureTags == NULL) { |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| 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) { |
| featureTags[i] = features; |
| } |
| |
| return count; |
| } |