| /* |
| * |
| * (C) Copyright IBM Corp. and others 1998-2013 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "MorphTables.h" |
| #include "StateTables.h" |
| #include "MorphStateTables.h" |
| #include "SubtableProcessor2.h" |
| #include "StateTableProcessor2.h" |
| #include "ContextualGlyphSubstProc2.h" |
| #include "LEGlyphStorage.h" |
| #include "LESwaps.h" |
| #include <stdio.h> |
| |
| U_NAMESPACE_BEGIN |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor2) |
| |
| ContextualGlyphSubstitutionProcessor2::ContextualGlyphSubstitutionProcessor2(const MorphSubtableHeader2 *morphSubtableHeader) |
| : StateTableProcessor2(morphSubtableHeader) |
| { |
| contextualGlyphHeader = (const ContextualGlyphHeader2 *) morphSubtableHeader; |
| le_uint32 perGlyphTableOffset = SWAPL(contextualGlyphHeader->perGlyphTableOffset); |
| perGlyphTable = ((le_uint32 *) ((char *)&stateTableHeader->stHeader + perGlyphTableOffset)); |
| entryTable = (const ContextualGlyphStateEntry2 *) ((char *) &stateTableHeader->stHeader + entryTableOffset); |
| } |
| |
| ContextualGlyphSubstitutionProcessor2::~ContextualGlyphSubstitutionProcessor2() |
| { |
| } |
| |
| void ContextualGlyphSubstitutionProcessor2::beginStateTable() |
| { |
| markGlyph = 0; |
| } |
| |
| le_uint16 ContextualGlyphSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index) |
| { |
| const ContextualGlyphStateEntry2 *entry = &entryTable[index]; |
| le_uint16 newState = SWAPW(entry->newStateIndex); |
| le_uint16 flags = SWAPW(entry->flags); |
| le_int16 markIndex = SWAPW(entry->markIndex); |
| le_int16 currIndex = SWAPW(entry->currIndex); |
| |
| if (markIndex != -1) { |
| le_uint32 offset = SWAPL(perGlyphTable[markIndex]); |
| LEGlyphID mGlyph = glyphStorage[markGlyph]; |
| TTGlyphID newGlyph = lookup(offset, mGlyph); |
| glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph); |
| } |
| |
| if (currIndex != -1) { |
| le_uint32 offset = SWAPL(perGlyphTable[currIndex]); |
| LEGlyphID thisGlyph = glyphStorage[currGlyph]; |
| TTGlyphID newGlyph = lookup(offset, thisGlyph); |
| glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph); |
| } |
| |
| if (flags & cgsSetMark) { |
| markGlyph = currGlyph; |
| } |
| |
| if (!(flags & cgsDontAdvance)) { |
| currGlyph += dir; |
| } |
| |
| return newState; |
| } |
| |
| TTGlyphID ContextualGlyphSubstitutionProcessor2::lookup(le_uint32 offset, LEGlyphID gid) |
| { |
| LookupTable *lookupTable = ((LookupTable *) ((char *)perGlyphTable + offset)); |
| le_int16 format = SWAPW(lookupTable->format); |
| TTGlyphID newGlyph = 0xFFFF; |
| |
| switch (format) { |
| case ltfSimpleArray: { |
| #ifdef TEST_FORMAT |
| // Disabled pending for design review |
| SimpleArrayLookupTable *lookupTable0 = (SimpleArrayLookupTable *) lookupTable; |
| TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid); |
| newGlyph = SWAPW(lookupTable0->valueArray[glyphCode]); |
| #endif |
| break; |
| } |
| case ltfSegmentSingle: { |
| #ifdef TEST_FORMAT |
| // Disabled pending for design review |
| SegmentSingleLookupTable *lookupTable2 = (SegmentSingleLookupTable *) lookupTable; |
| const LookupSegment *segment = lookupTable2->lookupSegment(lookupTable2->segments, gid); |
| if (segment != NULL) { |
| newGlyph = SWAPW(segment->value); |
| } |
| #endif |
| break; |
| } |
| case ltfSegmentArray: { |
| printf("Context Lookup Table Format4: specific interpretation needed!\n"); |
| break; |
| } |
| case ltfSingleTable: |
| { |
| #ifdef TEST_FORMAT |
| // Disabled pending for design review |
| SingleTableLookupTable *lookupTable6 = (SingleTableLookupTable *) lookupTable; |
| const LookupSingle *segment = lookupTable6->lookupSingle(lookupTable6->entries, gid); |
| if (segment != NULL) { |
| newGlyph = SWAPW(segment->value); |
| } |
| #endif |
| break; |
| } |
| case ltfTrimmedArray: { |
| TrimmedArrayLookupTable *lookupTable8 = (TrimmedArrayLookupTable *) lookupTable; |
| TTGlyphID firstGlyph = SWAPW(lookupTable8->firstGlyph); |
| TTGlyphID lastGlyph = firstGlyph + SWAPW(lookupTable8->glyphCount); |
| TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid); |
| if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) { |
| newGlyph = SWAPW(lookupTable8->valueArray[glyphCode - firstGlyph]); |
| } |
| } |
| default: |
| break; |
| } |
| return newGlyph; |
| } |
| |
| void ContextualGlyphSubstitutionProcessor2::endStateTable() |
| { |
| } |
| |
| U_NAMESPACE_END |