projects / apple / icu.git / blame
| Commit | Line | Data |
|---|---|---|
| 51004dcb A |
1 | /* |
| 2 | * | |
| 3 | * (C) Copyright IBM Corp. and others 1998-2013 - All Rights Reserved | |
| 4 | * | |
| 5 | */ | |
| 6 | ||
| 7 | #include "LETypes.h" | |
| 8 | #include "MorphTables.h" | |
| 9 | #include "StateTables.h" | |
| 10 | #include "MorphStateTables.h" | |
| 11 | #include "SubtableProcessor2.h" | |
| 12 | #include "StateTableProcessor2.h" | |
| 13 | #include "ContextualGlyphSubstProc2.h" | |
| 14 | #include "LEGlyphStorage.h" | |
| 15 | #include "LESwaps.h" | |
| 16 | #include <stdio.h> | |
| 17 | ||
| 18 | U_NAMESPACE_BEGIN | |
| 19 | ||
| 20 | UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor2) | |
| 21 | ||
| 22 | ContextualGlyphSubstitutionProcessor2::ContextualGlyphSubstitutionProcessor2(const MorphSubtableHeader2 *morphSubtableHeader) | |
| 23 | : StateTableProcessor2(morphSubtableHeader) | |
| 24 | { | |
| 25 | contextualGlyphHeader = (const ContextualGlyphHeader2 *) morphSubtableHeader; | |
| 26 | le_uint32 perGlyphTableOffset = SWAPL(contextualGlyphHeader->perGlyphTableOffset); | |
| 27 | perGlyphTable = ((le_uint32 *) ((char *)&stateTableHeader->stHeader + perGlyphTableOffset)); | |
| 28 | entryTable = (const ContextualGlyphStateEntry2 *) ((char *) &stateTableHeader->stHeader + entryTableOffset); | |
| 29 | } | |
| 30 | ||
| 31 | ContextualGlyphSubstitutionProcessor2::~ContextualGlyphSubstitutionProcessor2() | |
| 32 | { | |
| 33 | } | |
| 34 | ||
| 35 | void ContextualGlyphSubstitutionProcessor2::beginStateTable() | |
| 36 | { | |
| 37 | markGlyph = 0; | |
| 38 | } | |
| 39 | ||
| 40 | le_uint16 ContextualGlyphSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index) | |
| 41 | { | |
| 42 | const ContextualGlyphStateEntry2 *entry = &entryTable[index]; | |
| 43 | le_uint16 newState = SWAPW(entry->newStateIndex); | |
| 44 | le_uint16 flags = SWAPW(entry->flags); | |
| 45 | le_int16 markIndex = SWAPW(entry->markIndex); | |
| 46 | le_int16 currIndex = SWAPW(entry->currIndex); | |
| 47 | ||
| 48 | if (markIndex != -1) { | |
| 49 | le_uint32 offset = SWAPL(perGlyphTable[markIndex]); | |
| 50 | LEGlyphID mGlyph = glyphStorage[markGlyph]; | |
| 51 | TTGlyphID newGlyph = lookup(offset, mGlyph); | |
| 52 | glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph); | |
| 53 | } | |
| 54 | ||
| 55 | if (currIndex != -1) { | |
| 56 | le_uint32 offset = SWAPL(perGlyphTable[currIndex]); | |
| 57 | LEGlyphID thisGlyph = glyphStorage[currGlyph]; | |
| 58 | TTGlyphID newGlyph = lookup(offset, thisGlyph); | |
| 59 | glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph); | |
| 60 | } | |
| 61 | ||
| 62 | if (flags & cgsSetMark) { | |
| 63 | markGlyph = currGlyph; | |
| 64 | } | |
| 65 | ||
| 66 | if (!(flags & cgsDontAdvance)) { | |
| 67 | currGlyph += dir; | |
| 68 | } | |
| 69 | ||
| 70 | return newState; | |
| 71 | } | |
| 72 | ||
| 73 | TTGlyphID ContextualGlyphSubstitutionProcessor2::lookup(le_uint32 offset, LEGlyphID gid) | |
| 74 | { | |
| 75 | LookupTable *lookupTable = ((LookupTable *) ((char *)perGlyphTable + offset)); | |
| 76 | le_int16 format = SWAPW(lookupTable->format); | |
| 77 | TTGlyphID newGlyph = 0xFFFF; | |
| 78 | ||
| 79 | switch (format) { | |
| 80 | case ltfSimpleArray: { | |
| 81 | #ifdef TEST_FORMAT | |
| 82 | // Disabled pending for design review | |
| 83 | SimpleArrayLookupTable *lookupTable0 = (SimpleArrayLookupTable *) lookupTable; | |
| 84 | TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid); | |
| 85 | newGlyph = SWAPW(lookupTable0->valueArray[glyphCode]); | |
| 86 | #endif | |
| 87 | break; | |
| 88 | } | |
| 89 | case ltfSegmentSingle: { | |
| 90 | #ifdef TEST_FORMAT | |
| 91 | // Disabled pending for design review | |
| 92 | SegmentSingleLookupTable *lookupTable2 = (SegmentSingleLookupTable *) lookupTable; | |
| 93 | const LookupSegment *segment = lookupTable2->lookupSegment(lookupTable2->segments, gid); | |
| 94 | if (segment != NULL) { | |
| 95 | newGlyph = SWAPW(segment->value); | |
| 96 | } | |
| 97 | #endif | |
| 98 | break; | |
| 99 | } | |
| 100 | case ltfSegmentArray: { | |
| 101 | printf("Context Lookup Table Format4: specific interpretation needed!\n"); | |
| 102 | break; | |
| 103 | } | |
| 104 | case ltfSingleTable: | |
| 105 | { | |
| 106 | #ifdef TEST_FORMAT | |
| 107 | // Disabled pending for design review | |
| 108 | SingleTableLookupTable *lookupTable6 = (SingleTableLookupTable *) lookupTable; | |
| 109 | const LookupSingle *segment = lookupTable6->lookupSingle(lookupTable6->entries, gid); | |
| 110 | if (segment != NULL) { | |
| 111 | newGlyph = SWAPW(segment->value); | |
| 112 | } | |
| 113 | #endif | |
| 114 | break; | |
| 115 | } | |
| 116 | case ltfTrimmedArray: { | |
| 117 | TrimmedArrayLookupTable *lookupTable8 = (TrimmedArrayLookupTable *) lookupTable; | |
| 118 | TTGlyphID firstGlyph = SWAPW(lookupTable8->firstGlyph); | |
| 119 | TTGlyphID lastGlyph = firstGlyph + SWAPW(lookupTable8->glyphCount); | |
| 120 | TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid); | |
| 121 | if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) { | |
| 122 | newGlyph = SWAPW(lookupTable8->valueArray[glyphCode - firstGlyph]); | |
| 123 | } | |
| 124 | } | |
| 125 | default: | |
| 126 | break; | |
| 127 | } | |
| 128 | return newGlyph; | |
| 129 | } | |
| 130 | ||
| 131 | void ContextualGlyphSubstitutionProcessor2::endStateTable() | |
| 132 | { | |
| 133 | } | |
| 134 | ||
| 135 | U_NAMESPACE_END |