| /* |
| * @(#)GlyphPosnLookupProc.cpp 1.6 00/03/15 |
| * |
| * (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "LEFontInstance.h" |
| #include "OpenTypeTables.h" |
| #include "Features.h" |
| #include "Lookups.h" |
| #include "ScriptAndLanguage.h" |
| #include "GlyphDefinitionTables.h" |
| #include "GlyphPositioningTables.h" |
| #include "SinglePositioningSubtables.h" |
| #include "PairPositioningSubtables.h" |
| #include "CursiveAttachmentSubtables.h" |
| #include "MarkToBasePosnSubtables.h" |
| #include "MarkToLigaturePosnSubtables.h" |
| #include "MarkToMarkPosnSubtables.h" |
| //#include "ContextualPositioningSubtables.h" |
| #include "ContextualSubstSubtables.h" |
| #include "LookupProcessor.h" |
| #include "GlyphPosnLookupProc.h" |
| #include "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| // Aside from the names, the contextual positioning subtables are |
| // the same as the contextual substitution subtables. |
| typedef ContextualSubstitutionSubtable ContextualPositioningSubtable; |
| typedef ChainingContextualSubstitutionSubtable ChainingContextualPositioningSubtable; |
| |
| GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor( |
| const GlyphPositioningTableHeader *glyphPositioningTableHeader, |
| LETag scriptTag, LETag languageTag, const LETag *featureOrder) |
| : LookupProcessor( |
| (char *) glyphPositioningTableHeader, |
| SWAPW(glyphPositioningTableHeader->scriptListOffset), |
| SWAPW(glyphPositioningTableHeader->featureListOffset), |
| SWAPW(glyphPositioningTableHeader->lookupListOffset), |
| scriptTag, languageTag, featureOrder) |
| { |
| // anything? |
| } |
| |
| GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor() |
| { |
| } |
| |
| le_uint32 GlyphPositioningLookupProcessor::applySubtable(const LookupSubtable *lookupSubtable, le_uint16 lookupType, |
| GlyphIterator *glyphIterator, |
| const LEFontInstance *fontInstance) const |
| { |
| le_uint32 delta = 0; |
| |
| switch(lookupType) |
| { |
| case 0: |
| break; |
| |
| case gpstSingle: |
| { |
| const SinglePositioningSubtable *subtable = (const SinglePositioningSubtable *) lookupSubtable; |
| |
| delta = subtable->process(glyphIterator, fontInstance); |
| break; |
| } |
| |
| case gpstPair: |
| { |
| const PairPositioningSubtable *subtable = (const PairPositioningSubtable *) lookupSubtable; |
| |
| delta = subtable->process(glyphIterator, fontInstance); |
| break; |
| } |
| |
| case gpstCursive: |
| { |
| const CursiveAttachmentSubtable *subtable = (const CursiveAttachmentSubtable *) lookupSubtable; |
| |
| delta = subtable->process(glyphIterator, fontInstance); |
| break; |
| } |
| |
| case gpstMarkToBase: |
| { |
| const MarkToBasePositioningSubtable *subtable = (const MarkToBasePositioningSubtable *) lookupSubtable; |
| |
| delta = subtable->process(glyphIterator, fontInstance); |
| break; |
| } |
| |
| case gpstMarkToLigature: |
| { |
| const MarkToLigaturePositioningSubtable *subtable = (const MarkToLigaturePositioningSubtable *) lookupSubtable; |
| |
| delta = subtable->process(glyphIterator, fontInstance); |
| break; |
| } |
| |
| case gpstMarkToMark: |
| { |
| const MarkToMarkPositioningSubtable *subtable = (const MarkToMarkPositioningSubtable *) lookupSubtable; |
| |
| delta = subtable->process(glyphIterator, fontInstance); |
| break; |
| } |
| |
| case gpstContext: |
| { |
| const ContextualPositioningSubtable *subtable = (const ContextualPositioningSubtable *) lookupSubtable; |
| |
| delta = subtable->process(this, glyphIterator, fontInstance); |
| break; |
| } |
| |
| case gpstChainedContext: |
| { |
| const ChainingContextualPositioningSubtable *subtable = (const ChainingContextualPositioningSubtable *) lookupSubtable; |
| |
| delta = subtable->process(this, glyphIterator, fontInstance); |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| return delta; |
| } |
| |
| GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor() |
| { |
| } |
| |
| U_NAMESPACE_END |