projects / apple / icu.git / blame
| Commit | Line | Data |
|---|---|---|
| b75a7d8f A |
1 | /* |
| 2 | * @(#)ContextualGlyphSubstProc.cpp 1.6 00/03/15 | |
| 3 | * | |
| 4 | * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved | |
| 5 | * | |
| 6 | */ | |
| 7 | ||
| 8 | #include "LETypes.h" | |
| 9 | #include "MorphTables.h" | |
| 10 | #include "StateTables.h" | |
| 11 | #include "MorphStateTables.h" | |
| 12 | #include "SubtableProcessor.h" | |
| 13 | #include "StateTableProcessor.h" | |
| 14 | #include "ContextualGlyphSubstProc.h" | |
| 15 | #include "LESwaps.h" | |
| 16 | ||
| 17 | U_NAMESPACE_BEGIN | |
| 18 | ||
| 19 | const char ContextualGlyphSubstitutionProcessor::fgClassID=0; | |
| 20 | ||
| 21 | ContextualGlyphSubstitutionProcessor::ContextualGlyphSubstitutionProcessor(const MorphSubtableHeader *morphSubtableHeader) | |
| 22 | : StateTableProcessor(morphSubtableHeader) | |
| 23 | { | |
| 24 | contextualGlyphSubstitutionHeader = (const ContextualGlyphSubstitutionHeader *) morphSubtableHeader; | |
| 25 | substitutionTableOffset = SWAPW(contextualGlyphSubstitutionHeader->substitutionTableOffset); | |
| 26 | ||
| 27 | entryTable = (const ContextualGlyphSubstitutionStateEntry *) ((char *) &stateTableHeader->stHeader + entryTableOffset); | |
| 28 | } | |
| 29 | ||
| 30 | ContextualGlyphSubstitutionProcessor::~ContextualGlyphSubstitutionProcessor() | |
| 31 | { | |
| 32 | } | |
| 33 | ||
| 34 | void ContextualGlyphSubstitutionProcessor::beginStateTable() | |
| 35 | { | |
| 36 | markGlyph = 0; | |
| 37 | } | |
| 38 | ||
| 39 | ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphID *glyphs, le_int32 * /*charIndices*/, le_int32 &currGlyph, le_int32 /*glyphCount*/, EntryTableIndex index) | |
| 40 | { | |
| 41 | const ContextualGlyphSubstitutionStateEntry *entry = &entryTable[index]; | |
| 42 | ByteOffset newState = SWAPW(entry->newStateOffset); | |
| 43 | le_int16 flags = SWAPW(entry->flags); | |
| 44 | WordOffset markOffset = SWAPW(entry->markOffset); | |
| 45 | WordOffset currOffset = SWAPW(entry->currOffset); | |
| 46 | ||
| 47 | if (markOffset != 0) { | |
| 48 | const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + markOffset * 2); | |
| 49 | TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(glyphs[markGlyph])]); | |
| 50 | ||
| 51 | glyphs[markGlyph] = LE_SET_GLYPH(glyphs[markGlyph], newGlyph); | |
| 52 | } | |
| 53 | ||
| 54 | if (currOffset != 0) { | |
| 55 | const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + currOffset * 2); | |
| 56 | le_int16 newGlyph = SWAPW(table[LE_GET_GLYPH(glyphs[currGlyph])]); | |
| 57 | ||
| 58 | glyphs[currGlyph] = LE_SET_GLYPH(glyphs[currGlyph], newGlyph); | |
| 59 | } | |
| 60 | ||
| 61 | if (flags & cgsSetMark) { | |
| 62 | markGlyph = currGlyph; | |
| 63 | } | |
| 64 | ||
| 65 | if (!(flags & cgsDontAdvance)) { | |
| 66 | // should handle reverse too! | |
| 67 | currGlyph += 1; | |
| 68 | } | |
| 69 | ||
| 70 | return newState; | |
| 71 | } | |
| 72 | ||
| 73 | void ContextualGlyphSubstitutionProcessor::endStateTable() | |
| 74 | { | |
| 75 | } | |
| 76 | ||
| 77 | U_NAMESPACE_END |