3 * (C) Copyright IBM Corp and Others. 1998-2014 - 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 "LigatureSubstProc2.h"
14 #include "LEGlyphStorage.h"
19 #define ExtendedComplement(m) ((le_int32) (~((le_uint32) (m))))
20 #define SignBit(m) ((ExtendedComplement(m) >> 1) & (le_int32)(m))
21 #define SignExtend(v,m) (((v) & SignBit(m))? ((v) | ExtendedComplement(m)): (v))
23 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LigatureSubstitutionProcessor2)
25 LigatureSubstitutionProcessor2::LigatureSubstitutionProcessor2(const LEReferenceTo<MorphSubtableHeader2> &morphSubtableHeader, LEErrorCode &success)
26 : StateTableProcessor2(morphSubtableHeader, success),
28 componentOffset(0), ligatureOffset(0), entryTable(), ligatureSubstitutionHeader(morphSubtableHeader, success)
30 if (LE_FAILURE(success)) return;
32 ligActionOffset = SWAPL(ligatureSubstitutionHeader->ligActionOffset);
33 componentOffset = SWAPL(ligatureSubstitutionHeader->componentOffset);
34 ligatureOffset = SWAPL(ligatureSubstitutionHeader->ligatureOffset);
36 entryTable = LEReferenceToArrayOf<LigatureSubstitutionStateEntry2>(stHeader, success, entryTableOffset, LE_UNBOUNDED_ARRAY);
39 LigatureSubstitutionProcessor2::~LigatureSubstitutionProcessor2()
43 void LigatureSubstitutionProcessor2::beginStateTable()
48 le_uint16 LigatureSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index, LEErrorCode &success)
50 const LigatureSubstitutionStateEntry2 *entry = entryTable.getAlias(index, success);
51 if(LE_FAILURE(success)) return 0;
53 le_uint16 nextStateIndex = SWAPW(entry->nextStateIndex);
54 le_uint16 flags = SWAPW(entry->entryFlags);
55 le_uint16 ligActionIndex = SWAPW(entry->ligActionIndex);
57 if (flags & lsfSetComponent) {
58 if (++m >= nComponents) {
61 componentStack[m] = currGlyph;
62 } else if ( m == -1) {
63 // bad font- skip this glyph.
64 //LE_DEBUG_BAD_FONT("m==-1 (componentCount went negative)")
66 return nextStateIndex;
69 ByteOffset actionOffset = flags & lsfPerformAction;
71 if (actionOffset != 0) {
72 LEReferenceTo<LigatureActionEntry> ap(stHeader, success, ligActionOffset); // byte offset
73 ap.addObject(ligActionIndex - 1, success); // index offset ( one before the actual start, because we will pre-increment)
74 LEReferenceToArrayOf<TTGlyphID> ligatureTable(stHeader, success, ligatureOffset, LE_UNBOUNDED_ARRAY);
75 LigatureActionEntry action;
76 le_int32 offset, i = 0;
77 le_int32 stack[nComponents];
80 LEReferenceToArrayOf<le_uint16> componentTable(stHeader, success, componentOffset, LE_UNBOUNDED_ARRAY);
81 if(LE_FAILURE(success)) {
83 return nextStateIndex; // get out! bad font
87 le_int32 componentGlyph = componentStack[m--]; // pop off
89 ap.addObject(success);
90 action = SWAPL(*ap.getAlias());
96 offset = action & lafComponentOffsetMask;
98 if(componentGlyph > glyphStorage.getGlyphCount() || componentGlyph < 0) {
99 LE_DEBUG_BAD_FONT("preposterous componentGlyph");
101 return nextStateIndex; // get out! bad font
103 i += SWAPW(componentTable(LE_GET_GLYPH(glyphStorage[componentGlyph]) + (SignExtend(offset, lafComponentOffsetMask)),success));
105 if (action & (lafLast | lafStore)) {
106 TTGlyphID ligatureGlyph = SWAPW(ligatureTable(i,success));
107 glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], ligatureGlyph);
108 if(mm==nComponents) {
109 LE_DEBUG_BAD_FONT("exceeded nComponents");
110 mm--; // don't overrun the stack.
112 stack[++mm] = componentGlyph;
115 glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], 0xFFFF);
118 #if LE_ASSERT_BAD_FONT
120 LE_DEBUG_BAD_FONT("m<0")
123 } while (!(action & lafLast) && (m>=0) ); // stop if last bit is set, or if run out of items
126 if (++m >= nComponents) {
130 componentStack[m] = stack[mm--];
134 if (!(flags & lsfDontAdvance)) {
138 return nextStateIndex;
141 void LigatureSubstitutionProcessor2::endStateTable()