3 * (C) Copyright IBM Corp. and others 1998-2016 - All Rights Reserved
8 #include "MorphTables.h"
9 #include "StateTables.h"
10 #include "MorphStateTables.h"
11 #include "SubtableProcessor2.h"
12 #include "StateTableProcessor2.h"
13 #include "LEGlyphStorage.h"
15 #include "LookupTables.h"
19 StateTableProcessor2::StateTableProcessor2()
23 StateTableProcessor2::StateTableProcessor2(const LEReferenceTo<MorphSubtableHeader2> &morphSubtableHeader, LEErrorCode &success)
24 : SubtableProcessor2(morphSubtableHeader, success),
33 stateTableHeader(morphSubtableHeader, success),
34 stHeader(stateTableHeader, success, (const StateTableHeader2*)&stateTableHeader->stHeader)
36 if (LE_FAILURE(success)) {
39 nClasses = SWAPL(stHeader->nClasses);
40 classTableOffset = SWAPL(stHeader->classTableOffset);
41 stateArrayOffset = SWAPL(stHeader->stateArrayOffset);
42 entryTableOffset = SWAPL(stHeader->entryTableOffset);
44 classTable = LEReferenceTo<LookupTableBase>(stHeader, success, classTableOffset);
45 format = SWAPW(classTable->format);
47 stateArray = LEReferenceToArrayOf<EntryTableIndex2>(stHeader, success, stateArrayOffset, LE_UNBOUNDED_ARRAY);
50 StateTableProcessor2::~StateTableProcessor2()
54 void StateTableProcessor2::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
56 if (LE_FAILURE(success)) return;
58 // XXX: How do we know when to start at state 1?
59 le_uint16 currentState = 0;
60 le_int32 glyphCount = glyphStorage.getGlyphCount();
62 LE_STATE_PATIENCE_INIT();
64 le_int32 currGlyph = 0;
65 if ((coverage & scfReverse2) != 0) { // process glyphs in descending order
66 currGlyph = glyphCount - 1;
74 case ltfSimpleArray: {
76 LEReferenceTo<SimpleArrayLookupTable> lookupTable0(classTable, success);
77 if(LE_FAILURE(success)) break;
78 while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
79 if (LE_FAILURE(success)) break;
80 if (LE_STATE_PATIENCE_DECR()) {
81 LE_DEBUG_BAD_FONT("patience exceeded - state table not moving")
82 break; // patience exceeded.
84 LookupValue classCode = classCodeOOB;
85 if (currGlyph == glyphCount || currGlyph == -1) {
86 // XXX: How do we handle EOT vs. EOL?
87 classCode = classCodeEOT;
89 LEGlyphID gid = glyphStorage[currGlyph];
90 TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
92 if (glyphCode == 0xFFFF) {
93 classCode = classCodeDEL;
95 classCode = SWAPW(lookupTable0->valueArray[gid]);
98 EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses, success));
99 LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
100 currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex); // return a zero-based index instead of a byte offset
101 LE_STATE_PATIENCE_INCR(currGlyph);
106 case ltfSegmentSingle: {
107 LEReferenceTo<SegmentSingleLookupTable> lookupTable2(classTable, success);
108 if(LE_FAILURE(success)) break;
109 while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
110 if (LE_FAILURE(success)) break;
111 if (LE_STATE_PATIENCE_DECR()) {
112 LE_DEBUG_BAD_FONT("patience exceeded - state table not moving")
113 break; // patience exceeded.
115 LookupValue classCode = classCodeOOB;
116 if (currGlyph == glyphCount || currGlyph == -1) {
117 // XXX: How do we handle EOT vs. EOL?
118 classCode = classCodeEOT;
120 LEGlyphID gid = glyphStorage[currGlyph];
121 TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
123 if (glyphCode == 0xFFFF) {
124 classCode = classCodeDEL;
126 const LookupSegment *segment =
127 lookupTable2->lookupSegment(lookupTable2, lookupTable2->segments, gid, success);
128 if (segment != NULL && LE_SUCCESS(success)) {
129 classCode = SWAPW(segment->value);
133 EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses,success));
134 LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
135 currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex, success);
136 LE_STATE_PATIENCE_INCR(currGlyph);
140 case ltfSegmentArray: {
141 //printf("Lookup Table Format4: specific interpretation needed!\n");
144 case ltfSingleTable: {
145 LEReferenceTo<SingleTableLookupTable> lookupTable6(classTable, success);
146 while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
147 if (LE_FAILURE(success)) break;
148 if (LE_STATE_PATIENCE_DECR()) {
149 LE_DEBUG_BAD_FONT("patience exceeded - state table not moving")
150 break; // patience exceeded.
152 LookupValue classCode = classCodeOOB;
153 if (currGlyph == glyphCount || currGlyph == -1) {
154 // XXX: How do we handle EOT vs. EOL?
155 classCode = classCodeEOT;
156 } else if(currGlyph > glyphCount) {
157 // note if > glyphCount, we've run off the end (bad font)
158 currGlyph = glyphCount;
159 classCode = classCodeEOT;
161 LEGlyphID gid = glyphStorage[currGlyph];
162 TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
164 if (glyphCode == 0xFFFF) {
165 classCode = classCodeDEL;
167 const LookupSingle *segment = lookupTable6->lookupSingle(lookupTable6, lookupTable6->entries, gid, success);
168 if (segment != NULL) {
169 classCode = SWAPW(segment->value);
173 EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses, success));
174 LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
175 currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex, success);
176 LE_STATE_PATIENCE_INCR(currGlyph);
180 case ltfTrimmedArray: {
181 LEReferenceTo<TrimmedArrayLookupTable> lookupTable8(classTable, success);
182 if (LE_FAILURE(success)) break;
183 TTGlyphID firstGlyph = SWAPW(lookupTable8->firstGlyph);
184 TTGlyphID lastGlyph = firstGlyph + SWAPW(lookupTable8->glyphCount);
186 while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
187 if(LE_STATE_PATIENCE_DECR()) {
188 LE_DEBUG_BAD_FONT("patience exceeded - state table not moving")
189 break; // patience exceeded.
192 LookupValue classCode = classCodeOOB;
193 if (currGlyph == glyphCount || currGlyph == -1) {
194 // XXX: How do we handle EOT vs. EOL?
195 classCode = classCodeEOT;
197 TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
198 if (glyphCode == 0xFFFF) {
199 classCode = classCodeDEL;
200 } else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
201 classCode = SWAPW(lookupTable8->valueArray[glyphCode - firstGlyph]);
204 EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses, success));
205 LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
206 currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex, success);
207 LE_STATE_PATIENCE_INCR(currGlyph);