| /* |
| * (C) Copyright IBM Corp. and others 1998-2013 - All Rights Reserved |
| */ |
| |
| #include "LETypes.h" |
| #include "LEScripts.h" |
| #include "LELanguages.h" |
| #include "LESwaps.h" |
| |
| #include "LayoutEngine.h" |
| #include "ArabicLayoutEngine.h" |
| #include "CanonShaping.h" |
| #include "HanLayoutEngine.h" |
| #include "HangulLayoutEngine.h" |
| #include "IndicLayoutEngine.h" |
| #include "KhmerLayoutEngine.h" |
| #include "ThaiLayoutEngine.h" |
| #include "TibetanLayoutEngine.h" |
| #include "GXLayoutEngine.h" |
| #include "GXLayoutEngine2.h" |
| |
| #include "ScriptAndLanguageTags.h" |
| #include "CharSubstitutionFilter.h" |
| |
| #include "LEGlyphStorage.h" |
| |
| #include "OpenTypeUtilities.h" |
| #include "GlyphSubstitutionTables.h" |
| #include "GlyphDefinitionTables.h" |
| #include "MorphTables.h" |
| |
| #include "DefaultCharMapper.h" |
| |
| #include "KernTable.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| /* Leave this copyright notice here! It needs to go somewhere in this library. */ |
| static const char copyright[] = U_COPYRIGHT_STRING; |
| |
| /* TODO: remove these? */ |
| const le_int32 LayoutEngine::kTypoFlagKern = LE_Kerning_FEATURE_FLAG; |
| const le_int32 LayoutEngine::kTypoFlagLiga = LE_Ligatures_FEATURE_FLAG; |
| |
| const LEUnicode32 DefaultCharMapper::controlChars[] = { |
| 0x0009, 0x000A, 0x000D, |
| /*0x200C, 0x200D,*/ 0x200E, 0x200F, |
| 0x2028, 0x2029, 0x202A, 0x202B, 0x202C, 0x202D, 0x202E, |
| 0x206A, 0x206B, 0x206C, 0x206D, 0x206E, 0x206F |
| }; |
| |
| const le_int32 DefaultCharMapper::controlCharsCount = LE_ARRAY_SIZE(controlChars); |
| |
| LEUnicode32 DefaultCharMapper::mapChar(LEUnicode32 ch) const |
| { |
| if (fFilterControls) { |
| le_int32 index = OpenTypeUtilities::search((le_uint32)ch, (le_uint32 *)controlChars, controlCharsCount); |
| |
| if (controlChars[index] == ch) { |
| return 0xFFFF; |
| } |
| } |
| |
| if (fMirror) { |
| le_int32 index = OpenTypeUtilities::search((le_uint32) ch, (le_uint32 *)DefaultCharMapper::mirroredChars, DefaultCharMapper::mirroredCharsCount); |
| |
| if (mirroredChars[index] == ch) { |
| return DefaultCharMapper::srahCderorrim[index]; |
| } |
| } |
| |
| return ch; |
| } |
| |
| // This is here to get it out of LEGlyphFilter.h. |
| // No particular reason to put it here, other than |
| // this is a good central location... |
| LEGlyphFilter::~LEGlyphFilter() |
| { |
| // nothing to do |
| } |
| |
| CharSubstitutionFilter::CharSubstitutionFilter(const LEFontInstance *fontInstance) |
| : fFontInstance(fontInstance) |
| { |
| // nothing to do |
| } |
| |
| CharSubstitutionFilter::~CharSubstitutionFilter() |
| { |
| // nothing to do |
| } |
| |
| class CanonMarkFilter : public UMemory, public LEGlyphFilter |
| { |
| private: |
| const GlyphClassDefinitionTable *classDefTable; |
| |
| CanonMarkFilter(const CanonMarkFilter &other); // forbid copying of this class |
| CanonMarkFilter &operator=(const CanonMarkFilter &other); // forbid copying of this class |
| |
| public: |
| CanonMarkFilter(const GlyphDefinitionTableHeader *gdefTable); |
| virtual ~CanonMarkFilter(); |
| |
| virtual le_bool accept(LEGlyphID glyph) const; |
| }; |
| |
| CanonMarkFilter::CanonMarkFilter(const GlyphDefinitionTableHeader *gdefTable) |
| { |
| classDefTable = gdefTable->getMarkAttachClassDefinitionTable(); |
| } |
| |
| CanonMarkFilter::~CanonMarkFilter() |
| { |
| // nothing to do? |
| } |
| |
| le_bool CanonMarkFilter::accept(LEGlyphID glyph) const |
| { |
| le_int32 glyphClass = classDefTable->getGlyphClass(glyph); |
| |
| return glyphClass != 0; |
| } |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LayoutEngine) |
| |
| #define ccmpFeatureTag LE_CCMP_FEATURE_TAG |
| |
| #define ccmpFeatureMask 0x80000000UL |
| |
| #define canonFeatures (ccmpFeatureMask) |
| |
| static const FeatureMap canonFeatureMap[] = |
| { |
| {ccmpFeatureTag, ccmpFeatureMask} |
| }; |
| |
| static const le_int32 canonFeatureMapCount = LE_ARRAY_SIZE(canonFeatureMap); |
| |
| LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance, |
| le_int32 scriptCode, |
| le_int32 languageCode, |
| le_int32 typoFlags, |
| LEErrorCode &success) |
| : fGlyphStorage(NULL), fFontInstance(fontInstance), fScriptCode(scriptCode), fLanguageCode(languageCode), |
| fTypoFlags(typoFlags), fFilterZeroWidth(TRUE) |
| { |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| fGlyphStorage = new LEGlyphStorage(); |
| if (fGlyphStorage == NULL) { |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| } |
| } |
| |
| le_int32 LayoutEngine::getGlyphCount() const |
| { |
| return fGlyphStorage->getGlyphCount(); |
| } |
| |
| void LayoutEngine::getCharIndices(le_int32 charIndices[], le_int32 indexBase, LEErrorCode &success) const |
| { |
| fGlyphStorage->getCharIndices(charIndices, indexBase, success); |
| } |
| |
| void LayoutEngine::getCharIndices(le_int32 charIndices[], LEErrorCode &success) const |
| { |
| fGlyphStorage->getCharIndices(charIndices, success); |
| } |
| |
| // Copy the glyphs into caller's (32-bit) glyph array, OR in extraBits |
| void LayoutEngine::getGlyphs(le_uint32 glyphs[], le_uint32 extraBits, LEErrorCode &success) const |
| { |
| fGlyphStorage->getGlyphs(glyphs, extraBits, success); |
| } |
| |
| void LayoutEngine::getGlyphs(LEGlyphID glyphs[], LEErrorCode &success) const |
| { |
| fGlyphStorage->getGlyphs(glyphs, success); |
| } |
| |
| |
| void LayoutEngine::getGlyphPositions(float positions[], LEErrorCode &success) const |
| { |
| fGlyphStorage->getGlyphPositions(positions, success); |
| } |
| |
| void LayoutEngine::getGlyphPosition(le_int32 glyphIndex, float &x, float &y, LEErrorCode &success) const |
| { |
| fGlyphStorage->getGlyphPosition(glyphIndex, x, y, success); |
| } |
| |
| le_int32 LayoutEngine::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 (offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return 0; |
| } |
| |
| const GlyphSubstitutionTableHeader *canonGSUBTable = (GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable; |
| LETag scriptTag = OpenTypeLayoutEngine::getScriptTag(fScriptCode); |
| LETag langSysTag = OpenTypeLayoutEngine::getLangSysTag(fLanguageCode); |
| le_int32 i, dir = 1, out = 0, outCharCount = count; |
| |
| if (canonGSUBTable->coversScript(scriptTag)) { |
| CharSubstitutionFilter *substitutionFilter = new CharSubstitutionFilter(fFontInstance); |
| if (substitutionFilter == NULL) { |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| |
| const LEUnicode *inChars = &chars[offset]; |
| LEUnicode *reordered = NULL; |
| LEGlyphStorage fakeGlyphStorage; |
| |
| fakeGlyphStorage.allocateGlyphArray(count, rightToLeft, success); |
| |
| if (LE_FAILURE(success)) { |
| delete substitutionFilter; |
| return 0; |
| } |
| |
| // This is the cheapest way to get mark reordering only for Hebrew. |
| // We could just do the mark reordering for all scripts, but most |
| // of them probably don't need it... |
| if (fScriptCode == hebrScriptCode) { |
| reordered = LE_NEW_ARRAY(LEUnicode, count); |
| |
| if (reordered == NULL) { |
| delete substitutionFilter; |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| |
| CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, reordered, fakeGlyphStorage); |
| inChars = reordered; |
| } |
| |
| fakeGlyphStorage.allocateAuxData(success); |
| |
| if (LE_FAILURE(success)) { |
| delete substitutionFilter; |
| return 0; |
| } |
| |
| if (rightToLeft) { |
| out = count - 1; |
| dir = -1; |
| } |
| |
| for (i = 0; i < count; i += 1, out += dir) { |
| fakeGlyphStorage[out] = (LEGlyphID) inChars[i]; |
| fakeGlyphStorage.setAuxData(out, canonFeatures, success); |
| } |
| |
| if (reordered != NULL) { |
| LE_DELETE_ARRAY(reordered); |
| } |
| |
| outCharCount = canonGSUBTable->process(fakeGlyphStorage, rightToLeft, scriptTag, langSysTag, NULL, substitutionFilter, canonFeatureMap, canonFeatureMapCount, FALSE, success); |
| |
| if (LE_FAILURE(success)) { |
| delete substitutionFilter; |
| return 0; |
| } |
| |
| out = (rightToLeft? outCharCount - 1 : 0); |
| |
| /* |
| * The char indices array in fakeGlyphStorage has the correct mapping |
| * back to the original input characters. Save it in glyphStorage. The |
| * subsequent call to glyphStoratge.allocateGlyphArray will keep this |
| * array rather than allocating and initializing a new one. |
| */ |
| glyphStorage.adoptCharIndicesArray(fakeGlyphStorage); |
| |
| outChars = LE_NEW_ARRAY(LEUnicode, outCharCount); |
| |
| if (outChars == NULL) { |
| delete substitutionFilter; |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| |
| for (i = 0; i < outCharCount; i += 1, out += dir) { |
| outChars[out] = (LEUnicode) LE_GET_GLYPH(fakeGlyphStorage[i]); |
| } |
| |
| delete substitutionFilter; |
| } |
| |
| return outCharCount; |
| } |
| |
| le_int32 LayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, |
| 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; |
| } |
| |
| LEUnicode *outChars = NULL; |
| le_int32 outCharCount = characterProcessing(chars, offset, count, max, rightToLeft, outChars, glyphStorage, success); |
| |
| if (outChars != NULL) { |
| mapCharsToGlyphs(outChars, 0, outCharCount, rightToLeft, rightToLeft, glyphStorage, success); |
| LE_DELETE_ARRAY(outChars); // FIXME: a subclass may have allocated this, in which case this delete might not work... |
| } else { |
| mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, glyphStorage, success); |
| } |
| |
| return glyphStorage.getGlyphCount(); |
| } |
| |
| // Input: glyphs |
| // Output: positions |
| void LayoutEngine::positionGlyphs(LEGlyphStorage &glyphStorage, float x, float y, LEErrorCode &success) |
| { |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| glyphStorage.allocatePositions(success); |
| |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| le_int32 i, glyphCount = glyphStorage.getGlyphCount(); |
| |
| for (i = 0; i < glyphCount; i += 1) { |
| LEPoint advance; |
| |
| glyphStorage.setPosition(i, x, y, success); |
| |
| fFontInstance->getGlyphAdvance(glyphStorage[i], advance); |
| x += advance.fX; |
| y += advance.fY; |
| } |
| |
| glyphStorage.setPosition(glyphCount, x, y, success); |
| } |
| |
| void LayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, |
| LEGlyphStorage &glyphStorage, LEErrorCode &success) |
| { |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| if (chars == NULL || offset < 0 || count < 0) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| GlyphDefinitionTableHeader *gdefTable = (GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable; |
| CanonMarkFilter filter(gdefTable); |
| |
| adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success); |
| |
| if (fTypoFlags & 0x1) { /* kerning enabled */ |
| static const le_uint32 kernTableTag = LE_KERN_TABLE_TAG; |
| |
| KernTable kt(fFontInstance, getFontTable(kernTableTag)); |
| kt.process(glyphStorage); |
| } |
| |
| // default is no adjustments |
| return; |
| } |
| |
| void LayoutEngine::adjustMarkGlyphs(LEGlyphStorage &glyphStorage, LEGlyphFilter *markFilter, LEErrorCode &success) |
| { |
| float xAdjust = 0; |
| le_int32 p, glyphCount = glyphStorage.getGlyphCount(); |
| |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| if (markFilter == NULL) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| float ignore, prev; |
| |
| glyphStorage.getGlyphPosition(0, prev, ignore, success); |
| |
| for (p = 0; p < glyphCount; p += 1) { |
| float next, xAdvance; |
| |
| glyphStorage.getGlyphPosition(p + 1, next, ignore, success); |
| |
| xAdvance = next - prev; |
| glyphStorage.adjustPosition(p, xAdjust, 0, success); |
| |
| if (markFilter->accept(glyphStorage[p])) { |
| xAdjust -= xAdvance; |
| } |
| |
| prev = next; |
| } |
| |
| glyphStorage.adjustPosition(glyphCount, xAdjust, 0, success); |
| } |
| |
| void LayoutEngine::adjustMarkGlyphs(const LEUnicode chars[], le_int32 charCount, le_bool reverse, LEGlyphStorage &glyphStorage, LEGlyphFilter *markFilter, LEErrorCode &success) |
| { |
| float xAdjust = 0; |
| le_int32 c = 0, direction = 1, p; |
| le_int32 glyphCount = glyphStorage.getGlyphCount(); |
| |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| if (markFilter == NULL) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| if (reverse) { |
| c = glyphCount - 1; |
| direction = -1; |
| } |
| |
| float ignore, prev; |
| |
| glyphStorage.getGlyphPosition(0, prev, ignore, success); |
| |
| for (p = 0; p < charCount; p += 1, c += direction) { |
| float next, xAdvance; |
| |
| glyphStorage.getGlyphPosition(p + 1, next, ignore, success); |
| |
| xAdvance = next - prev; |
| glyphStorage.adjustPosition(p, xAdjust, 0, success); |
| |
| if (markFilter->accept(chars[c])) { |
| xAdjust -= xAdvance; |
| } |
| |
| prev = next; |
| } |
| |
| glyphStorage.adjustPosition(glyphCount, xAdjust, 0, success); |
| } |
| |
| const void *LayoutEngine::getFontTable(LETag tableTag) const |
| { |
| return fFontInstance->getFontTable(tableTag); |
| } |
| |
| void LayoutEngine::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, le_bool mirror, |
| LEGlyphStorage &glyphStorage, LEErrorCode &success) |
| { |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| glyphStorage.allocateGlyphArray(count, reverse, success); |
| |
| DefaultCharMapper charMapper(TRUE, mirror); |
| |
| fFontInstance->mapCharsToGlyphs(chars, offset, count, reverse, &charMapper, fFilterZeroWidth, glyphStorage); |
| } |
| |
| // Input: characters, font? |
| // Output: glyphs, positions, char indices |
| // Returns: number of glyphs |
| le_int32 LayoutEngine::layoutChars(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, |
| float x, float y, 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; |
| } |
| |
| le_int32 glyphCount; |
| |
| if (fGlyphStorage->getGlyphCount() > 0) { |
| fGlyphStorage->reset(); |
| } |
| |
| glyphCount = computeGlyphs(chars, offset, count, max, rightToLeft, *fGlyphStorage, success); |
| positionGlyphs(*fGlyphStorage, x, y, success); |
| adjustGlyphPositions(chars, offset, count, rightToLeft, *fGlyphStorage, success); |
| |
| return glyphCount; |
| } |
| |
| void LayoutEngine::reset() |
| { |
| fGlyphStorage->reset(); |
| } |
| |
| LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, LEErrorCode &success) |
| { |
| // 3 -> kerning and ligatures |
| return LayoutEngine::layoutEngineFactory(fontInstance, scriptCode, languageCode, 3, success); |
| } |
| |
| LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success) |
| { |
| static const le_uint32 gsubTableTag = LE_GSUB_TABLE_TAG; |
| static const le_uint32 mortTableTag = LE_MORT_TABLE_TAG; |
| static const le_uint32 morxTableTag = LE_MORX_TABLE_TAG; |
| |
| if (LE_FAILURE(success)) { |
| return NULL; |
| } |
| |
| const GlyphSubstitutionTableHeader *gsubTable = (const GlyphSubstitutionTableHeader *) fontInstance->getFontTable(gsubTableTag); |
| LayoutEngine *result = NULL; |
| LETag scriptTag = 0x00000000; |
| LETag languageTag = 0x00000000; |
| LETag v2ScriptTag = OpenTypeLayoutEngine::getV2ScriptTag(scriptCode); |
| |
| // Right now, only invoke V2 processing for Devanagari. TODO: Allow more V2 scripts as they are |
| // properly tested. |
| |
| if ( v2ScriptTag == dev2ScriptTag && gsubTable != NULL && gsubTable->coversScript( v2ScriptTag )) { |
| result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, TRUE, gsubTable, success); |
| } |
| else if (gsubTable != NULL && gsubTable->coversScript(scriptTag = OpenTypeLayoutEngine::getScriptTag(scriptCode))) { |
| switch (scriptCode) { |
| case bengScriptCode: |
| case devaScriptCode: |
| case gujrScriptCode: |
| case kndaScriptCode: |
| case mlymScriptCode: |
| case oryaScriptCode: |
| case guruScriptCode: |
| case tamlScriptCode: |
| case teluScriptCode: |
| case sinhScriptCode: |
| result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, FALSE, gsubTable, success); |
| break; |
| |
| case arabScriptCode: |
| result = new ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); |
| break; |
| |
| case hebrScriptCode: |
| // Disable hebrew ligatures since they have only archaic uses, see ticket #8318 |
| result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags & ~kTypoFlagLiga, gsubTable, success); |
| break; |
| |
| case hangScriptCode: |
| result = new HangulOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); |
| break; |
| |
| case haniScriptCode: |
| languageTag = OpenTypeLayoutEngine::getLangSysTag(languageCode); |
| |
| switch (languageCode) { |
| case korLanguageCode: |
| case janLanguageCode: |
| case zhtLanguageCode: |
| case zhsLanguageCode: |
| if (gsubTable->coversScriptAndLanguage(scriptTag, languageTag, TRUE)) { |
| result = new HanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); |
| break; |
| } |
| |
| // note: falling through to default case. |
| default: |
| result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); |
| break; |
| } |
| |
| break; |
| |
| case tibtScriptCode: |
| result = new TibetanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); |
| break; |
| |
| case khmrScriptCode: |
| result = new KhmerOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); |
| break; |
| |
| default: |
| result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); |
| break; |
| } |
| } else { |
| MorphTableHeader2 *morxTable = (MorphTableHeader2 *)fontInstance->getFontTable(morxTableTag); |
| if (morxTable != NULL) { |
| result = new GXLayoutEngine2(fontInstance, scriptCode, languageCode, morxTable, typoFlags, success); |
| } else { |
| const MorphTableHeader *mortTable = (MorphTableHeader *) fontInstance->getFontTable(mortTableTag); |
| if (mortTable != NULL) { // mort |
| result = new GXLayoutEngine(fontInstance, scriptCode, languageCode, mortTable, success); |
| } else { |
| switch (scriptCode) { |
| case bengScriptCode: |
| case devaScriptCode: |
| case gujrScriptCode: |
| case kndaScriptCode: |
| case mlymScriptCode: |
| case oryaScriptCode: |
| case guruScriptCode: |
| case tamlScriptCode: |
| case teluScriptCode: |
| case sinhScriptCode: |
| { |
| result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success); |
| break; |
| } |
| |
| case arabScriptCode: |
| //case hebrScriptCode: |
| result = new UnicodeArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success); |
| break; |
| |
| //case hebrScriptCode: |
| // return new HebrewOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags); |
| |
| case thaiScriptCode: |
| result = new ThaiLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success); |
| break; |
| |
| case hangScriptCode: |
| result = new HangulOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success); |
| break; |
| |
| default: |
| result = new LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success); |
| break; |
| } |
| } |
| } |
| } |
| |
| if (result && LE_FAILURE(success)) { |
| delete result; |
| result = NULL; |
| } |
| |
| if (result == NULL) { |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| } |
| |
| return result; |
| } |
| |
| LayoutEngine::~LayoutEngine() { |
| delete fGlyphStorage; |
| } |
| |
| U_NAMESPACE_END |
