| /* |
| * |
| * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "MorphTables.h" |
| #include "StateTables.h" |
| #include "MorphStateTables.h" |
| #include "SubtableProcessor.h" |
| #include "StateTableProcessor.h" |
| #include "ContextualGlyphSubstProc.h" |
| #include "LEGlyphStorage.h" |
| #include "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor) |
| |
| ContextualGlyphSubstitutionProcessor::ContextualGlyphSubstitutionProcessor(const LEReferenceTo<MorphSubtableHeader> &morphSubtableHeader, LEErrorCode &success) |
| : StateTableProcessor(morphSubtableHeader, success), entryTable(), contextualGlyphSubstitutionHeader(morphSubtableHeader, success) |
| { |
| contextualGlyphSubstitutionHeader.orphan(); |
| substitutionTableOffset = SWAPW(contextualGlyphSubstitutionHeader->substitutionTableOffset); |
| |
| |
| entryTable = LEReferenceToArrayOf<ContextualGlyphSubstitutionStateEntry>(stateTableHeader, success, |
| (const ContextualGlyphSubstitutionStateEntry*)(&stateTableHeader->stHeader), |
| entryTableOffset, LE_UNBOUNDED_ARRAY); |
| int16Table = LEReferenceToArrayOf<le_int16>(stateTableHeader, success, (const le_int16*)(&stateTableHeader->stHeader), |
| 0, LE_UNBOUNDED_ARRAY); // rest of the table as le_int16s |
| } |
| |
| ContextualGlyphSubstitutionProcessor::~ContextualGlyphSubstitutionProcessor() |
| { |
| } |
| |
| void ContextualGlyphSubstitutionProcessor::beginStateTable() |
| { |
| markGlyph = 0; |
| } |
| |
| ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index) |
| { |
| LEErrorCode success = LE_NO_ERROR; |
| const ContextualGlyphSubstitutionStateEntry *entry = entryTable.getAlias(index, success); |
| ByteOffset newState = SWAPW(entry->newStateOffset); |
| le_int16 flags = SWAPW(entry->flags); |
| WordOffset markOffset = SWAPW(entry->markOffset); |
| WordOffset currOffset = SWAPW(entry->currOffset); |
| |
| if (markOffset != 0 && LE_SUCCESS(success)) { |
| LEGlyphID mGlyph = glyphStorage[markGlyph]; |
| TTGlyphID newGlyph = SWAPW(int16Table.getObject(markOffset + LE_GET_GLYPH(mGlyph), success)); // whew. |
| |
| glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph); |
| } |
| |
| if (currOffset != 0) { |
| LEGlyphID thisGlyph = glyphStorage[currGlyph]; |
| TTGlyphID newGlyph = SWAPW(int16Table.getObject(currOffset + LE_GET_GLYPH(thisGlyph), success)); // whew. |
| |
| glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph); |
| } |
| |
| if (flags & cgsSetMark) { |
| markGlyph = currGlyph; |
| } |
| |
| if (!(flags & cgsDontAdvance)) { |
| // should handle reverse too! |
| currGlyph += 1; |
| } |
| |
| return newState; |
| } |
| |
| void ContextualGlyphSubstitutionProcessor::endStateTable() |
| { |
| } |
| |
| U_NAMESPACE_END |