X-Git-Url: https://git.saurik.com/apple/icu.git/blobdiff_plain/4388f060552cc537e71e957d32f35e9d75a61233..ef6cf650f4a75c3f97de06b51fa104f2069b9ea2:/icuSources/layout/LayoutEngine.cpp diff --git a/icuSources/layout/LayoutEngine.cpp b/icuSources/layout/LayoutEngine.cpp index c815c83c..3e4d3456 100644 --- a/icuSources/layout/LayoutEngine.cpp +++ b/icuSources/layout/LayoutEngine.cpp @@ -1,10 +1,11 @@ /* - * (C) Copyright IBM Corp. 1998-2011 - All Rights Reserved + * (C) Copyright IBM Corp. and others 1998-2015 - All Rights Reserved */ #include "LETypes.h" #include "LEScripts.h" #include "LELanguages.h" +#include "LESwaps.h" #include "LayoutEngine.h" #include "ArabicLayoutEngine.h" @@ -16,6 +17,8 @@ #include "ThaiLayoutEngine.h" #include "TibetanLayoutEngine.h" #include "GXLayoutEngine.h" +#include "GXLayoutEngine2.h" + #include "ScriptAndLanguageTags.h" #include "CharSubstitutionFilter.h" @@ -35,8 +38,9 @@ U_NAMESPACE_BEGIN /* Leave this copyright notice here! It needs to go somewhere in this library. */ static const char copyright[] = U_COPYRIGHT_STRING; -const le_int32 LayoutEngine::kTypoFlagKern = 0x1; -const le_int32 LayoutEngine::kTypoFlagLiga = 0x2; +/* 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, @@ -49,6 +53,7 @@ const le_int32 DefaultCharMapper::controlCharsCount = LE_ARRAY_SIZE(controlChars LEUnicode32 DefaultCharMapper::mapChar(LEUnicode32 ch) const { + (void)copyright; // Suppress unused variable warning. if (fFilterControls) { le_int32 index = OpenTypeUtilities::search((le_uint32)ch, (le_uint32 *)controlChars, controlCharsCount); @@ -90,21 +95,21 @@ CharSubstitutionFilter::~CharSubstitutionFilter() class CanonMarkFilter : public UMemory, public LEGlyphFilter { private: - const GlyphClassDefinitionTable *classDefTable; + const LEReferenceTo 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); + CanonMarkFilter(const LEReferenceTo &gdefTable, LEErrorCode &success); virtual ~CanonMarkFilter(); virtual le_bool accept(LEGlyphID glyph) const; }; -CanonMarkFilter::CanonMarkFilter(const GlyphDefinitionTableHeader *gdefTable) +CanonMarkFilter::CanonMarkFilter(const LEReferenceTo &gdefTable, LEErrorCode &success) + : classDefTable(gdefTable->getMarkAttachClassDefinitionTable(gdefTable, success)) { - classDefTable = gdefTable->getMarkAttachClassDefinitionTable(); } CanonMarkFilter::~CanonMarkFilter() @@ -114,9 +119,10 @@ CanonMarkFilter::~CanonMarkFilter() le_bool CanonMarkFilter::accept(LEGlyphID glyph) const { - le_int32 glyphClass = classDefTable->getGlyphClass(glyph); - - return glyphClass != 0; + LEErrorCode success = LE_NO_ERROR; + le_int32 glyphClass = classDefTable->getGlyphClass(classDefTable, glyph, success); + if(LE_FAILURE(success)) return false; + return glyphClass != 0; } UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LayoutEngine) @@ -134,9 +140,9 @@ static const FeatureMap canonFeatureMap[] = static const le_int32 canonFeatureMapCount = LE_ARRAY_SIZE(canonFeatureMap); -LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance, - le_int32 scriptCode, - le_int32 languageCode, +LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance, + le_int32 scriptCode, + le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success) : fGlyphStorage(NULL), fFontInstance(fontInstance), fScriptCode(scriptCode), fLanguageCode(languageCode), @@ -144,7 +150,7 @@ LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance, { if (LE_FAILURE(success)) { return; - } + } fGlyphStorage = new LEGlyphStorage(); if (fGlyphStorage == NULL) { @@ -201,20 +207,20 @@ le_int32 LayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 off return 0; } - const GlyphSubstitutionTableHeader *canonGSUBTable = (GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable; + LEReferenceTo 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)) { + if (canonGSUBTable->coversScript(canonGSUBTable,scriptTag, success) || LE_SUCCESS(success)) { CharSubstitutionFilter *substitutionFilter = new CharSubstitutionFilter(fFontInstance); - if (substitutionFilter == NULL) { + if (substitutionFilter == NULL) { success = LE_MEMORY_ALLOCATION_ERROR; return 0; } - const LEUnicode *inChars = &chars[offset]; - LEUnicode *reordered = NULL; + const LEUnicode *inChars = &chars[offset]; + LEUnicode *reordered = NULL; LEGlyphStorage fakeGlyphStorage; fakeGlyphStorage.allocateGlyphArray(count, rightToLeft, success); @@ -224,20 +230,20 @@ le_int32 LayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 off 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; + // 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); @@ -257,11 +263,11 @@ le_int32 LayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 off fakeGlyphStorage.setAuxData(out, canonFeatures, success); } - if (reordered != NULL) { - LE_DELETE_ARRAY(reordered); - } + if (reordered != NULL) { + LE_DELETE_ARRAY(reordered); + } - outCharCount = canonGSUBTable->process(fakeGlyphStorage, rightToLeft, scriptTag, langSysTag, NULL, substitutionFilter, canonFeatureMap, canonFeatureMapCount, FALSE, success); + outCharCount = canonGSUBTable->process(canonGSUBTable, fakeGlyphStorage, rightToLeft, scriptTag, langSysTag, (const GlyphDefinitionTableHeader*)NULL, substitutionFilter, canonFeatureMap, canonFeatureMapCount, FALSE, success); if (LE_FAILURE(success)) { delete substitutionFilter; @@ -362,16 +368,16 @@ void LayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset return; } - GlyphDefinitionTableHeader *gdefTable = (GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable; - CanonMarkFilter filter(gdefTable); + LEReferenceTo gdefTable((GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable, + CanonShaping::glyphDefinitionTableLen); + CanonMarkFilter filter(gdefTable, success); 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); + if (fTypoFlags & LE_Kerning_FEATURE_FLAG) { /* kerning enabled */ + LETableReference kernTable(fFontInstance, LE_KERN_TABLE_TAG, success); + KernTable kt(kernTable, success); + kt.process(glyphStorage, success); } // default is no adjustments @@ -398,7 +404,7 @@ void LayoutEngine::adjustMarkGlyphs(LEGlyphStorage &glyphStorage, LEGlyphFilter for (p = 0; p < glyphCount; p += 1) { float next, xAdvance; - + glyphStorage.getGlyphPosition(p + 1, next, ignore, success); xAdvance = next - prev; @@ -440,7 +446,7 @@ void LayoutEngine::adjustMarkGlyphs(const LEUnicode chars[], le_int32 charCount, for (p = 0; p < charCount; p += 1, c += direction) { float next, xAdvance; - + glyphStorage.getGlyphPosition(p + 1, next, ignore, success); xAdvance = next - prev; @@ -456,9 +462,9 @@ void LayoutEngine::adjustMarkGlyphs(const LEUnicode chars[], le_int32 charCount, glyphStorage.adjustPosition(glyphCount, xAdjust, 0, success); } -const void *LayoutEngine::getFontTable(LETag tableTag) const +const void *LayoutEngine::getFontTable(LETag tableTag, size_t &length) const { - return fFontInstance->getFontTable(tableTag); + return fFontInstance->getFontTable(tableTag, length); } void LayoutEngine::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, le_bool mirror, @@ -495,7 +501,7 @@ le_int32 LayoutEngine::layoutChars(const LEUnicode chars[], le_int32 offset, le_ 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); @@ -505,37 +511,40 @@ le_int32 LayoutEngine::layoutChars(const LEUnicode chars[], le_int32 offset, le_ void LayoutEngine::reset() { + if(fGlyphStorage!=NULL) { 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); + //kerning and ligatures - by default + return LayoutEngine::layoutEngineFactory(fontInstance, scriptCode, languageCode, LE_DEFAULT_FEATURE_FLAG, 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); + LEReferenceTo gsubTable(fontInstance,gsubTableTag,success); LayoutEngine *result = NULL; LETag scriptTag = 0x00000000; LETag languageTag = 0x00000000; - LETag v2ScriptTag = OpenTypeLayoutEngine::getV2ScriptTag(scriptCode); + 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))) { + if ( v2ScriptTag == dev2ScriptTag && gsubTable.isValid() && gsubTable->coversScript(gsubTable, v2ScriptTag, success )) { + result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, TRUE, gsubTable, success); + } + else if (gsubTable.isValid() && gsubTable->coversScript(gsubTable, scriptTag = OpenTypeLayoutEngine::getScriptTag(scriptCode), success)) { switch (scriptCode) { case bengScriptCode: case devaScriptCode: @@ -571,10 +580,10 @@ LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstan case janLanguageCode: case zhtLanguageCode: case zhsLanguageCode: - if (gsubTable->coversScriptAndLanguage(scriptTag, languageTag, TRUE)) { + if (gsubTable->coversScriptAndLanguage(gsubTable, scriptTag, languageTag, success, TRUE)) { result = new HanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success); break; - } + } // note: falling through to default case. default: @@ -597,46 +606,50 @@ LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstan break; } } else { - const MorphTableHeader *morphTable = (MorphTableHeader *) fontInstance->getFontTable(mortTableTag); - - if (morphTable != NULL) { - result = new GXLayoutEngine(fontInstance, scriptCode, languageCode, morphTable, success); + LEReferenceTo morxTable(fontInstance, morxTableTag, success); + if (LE_SUCCESS(success) && morxTable.isValid() && SWAPL(morxTable->version)==0x00020000) { + result = new GXLayoutEngine2(fontInstance, scriptCode, languageCode, morxTable, typoFlags, 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; + LEReferenceTo mortTable(fontInstance, mortTableTag, success); + if (LE_SUCCESS(success) && mortTable.isValid() && SWAPL(mortTable->version)==0x00010000) { // 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; + } } } }