85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/*
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* HanLayoutEngine.cpp: OpenType processing for Han fonts.
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*
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* (C) Copyright IBM Corp. 1998-2008 - All Rights Reserved.
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*/
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#include "LETypes.h"
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#include "LEScripts.h"
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#include "LELanguages.h"
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#include "LayoutEngine.h"
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#include "OpenTypeLayoutEngine.h"
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#include "HanLayoutEngine.h"
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#include "ScriptAndLanguageTags.h"
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#include "LEGlyphStorage.h"
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#include "OpenTypeTables.h"
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U_NAMESPACE_BEGIN
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(HanOpenTypeLayoutEngine)
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#define loclFeatureTag LE_LOCL_FEATURE_TAG
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#define smplFeatureTag LE_SMPL_FEATURE_TAG
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#define tradFeatureTag LE_TRAD_FEATURE_TAG
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#define loclFeatureMask 0x80000000UL
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#define smplFeatureMask 0x40000000UL
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#define tradFeatureMask 0x20000000UL
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static const FeatureMap featureMap[] =
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{
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{loclFeatureTag, loclFeatureMask},
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{smplFeatureTag, smplFeatureMask},
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{tradFeatureTag, tradFeatureMask}
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};
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static const le_int32 featureMapCount = LE_ARRAY_SIZE(featureMap);
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#define features (loclFeatureMask)
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HanOpenTypeLayoutEngine::HanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
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le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable, LEErrorCode &success)
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: OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success)
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{
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fFeatureMap = featureMap;
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fFeatureMapCount = featureMapCount;
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}
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HanOpenTypeLayoutEngine::~HanOpenTypeLayoutEngine()
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{
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// nothing to do
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}
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le_int32 HanOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool /*rightToLeft*/,
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LEUnicode *&/*outChars*/, LEGlyphStorage &glyphStorage, LEErrorCode &success)
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{
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if (LE_FAILURE(success)) {
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return 0;
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}
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if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
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success = LE_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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glyphStorage.allocateGlyphArray(count, FALSE, success);
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glyphStorage.allocateAuxData(success);
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if (LE_FAILURE(success)) {
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return 0;
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}
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// FIXME: do we want to add the 'trad' feature for 'ZHT' and the
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// 'smpl' feature for 'ZHS'? If we do this, we can remove the exact
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// flag from the language tag lookups, so we can use these features
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// with the default LangSys...
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for (le_int32 i = 0; i < count; i += 1) {
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glyphStorage.setAuxData(i, features, success);
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}
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return count;
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}
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U_NAMESPACE_END
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