| /* |
| * @(#)ContextualGlyphSubstProc.cpp 1.6 00/03/15 |
| * |
| * (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - 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 "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| ContextualGlyphSubstitutionProcessor::ContextualGlyphSubstitutionProcessor(const MorphSubtableHeader *morphSubtableHeader) |
| : StateTableProcessor(morphSubtableHeader) |
| { |
| contextualGlyphSubstitutionHeader = (const ContextualGlyphSubstitutionHeader *) morphSubtableHeader; |
| substitutionTableOffset = SWAPW(contextualGlyphSubstitutionHeader->substitutionTableOffset); |
| |
| entryTable = (const ContextualGlyphSubstitutionStateEntry *) ((char *) &stateTableHeader->stHeader + entryTableOffset); |
| } |
| |
| ContextualGlyphSubstitutionProcessor::~ContextualGlyphSubstitutionProcessor() |
| { |
| } |
| |
| void ContextualGlyphSubstitutionProcessor::beginStateTable() |
| { |
| markGlyph = 0; |
| } |
| |
| ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphID *glyphs, le_int32 * charIndices, le_int32 &currGlyph, le_int32 glyphCount, EntryTableIndex index) |
| { |
| const ContextualGlyphSubstitutionStateEntry *entry = &entryTable[index]; |
| ByteOffset newState = SWAPW(entry->newStateOffset); |
| le_int16 flags = SWAPW(entry->flags); |
| WordOffset markOffset = SWAPW(entry->markOffset); |
| WordOffset currOffset = SWAPW(entry->currOffset); |
| |
| if (markOffset != 0) { |
| const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + markOffset * 2); |
| le_int16 newGlyph = table[glyphs[markGlyph]]; |
| |
| glyphs[markGlyph] = SWAPW(newGlyph); |
| } |
| |
| if (currOffset != 0) { |
| const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + currOffset * 2); |
| le_int16 newGlyph = table[glyphs[currGlyph]]; |
| |
| glyphs[currGlyph] = SWAPW(newGlyph); |
| } |
| |
| if (flags & cgsSetMark) { |
| markGlyph = currGlyph; |
| } |
| |
| if (!(flags & cgsDontAdvance)) { |
| // should handle reverse too! |
| currGlyph += 1; |
| } |
| |
| return newState; |
| } |
| |
| void ContextualGlyphSubstitutionProcessor::endStateTable() |
| { |
| } |
| |
| U_NAMESPACE_END |