| | 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 |
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