ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index)
{
const ContextualGlyphSubstitutionStateEntry *entry = &entryTable[index];
ByteOffset newState = SWAPW(entry->newStateOffset);
le_int16 flags = SWAPW(entry->flags);
WordOffset markOffset = SWAPW(entry->markOffset);
WordOffset currOffset = SWAPW(entry->currOffset);
if (markOffset != 0) {
const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + markOffset * 2);
LEGlyphID mGlyph = glyphStorage[markGlyph];
TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(mGlyph)]);
glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph);
}
if (currOffset != 0) {
const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + currOffset * 2);
LEGlyphID thisGlyph = glyphStorage[currGlyph];
TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(thisGlyph)]);
glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
if (flags & cgsSetMark) {
markGlyph = currGlyph;
}
if (!(flags & cgsDontAdvance)) {
// should handle reverse too!
currGlyph += 1;
}
return newState;
}
le_uint32 AlternateSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
{
// NOTE: For now, we'll just pick the first alternative...
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(glyph);
if (coverageIndex >= 0) {
le_uint16 altSetCount = SWAPW(alternateSetCount);
if (coverageIndex < altSetCount) {
Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]);
const AlternateSetTable *alternateSetTable =
(const AlternateSetTable *) ((char *) this + alternateSetTableOffset);
TTGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]);
if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, alternate))) {
glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0]));
}
return 1;
}
// XXXX If we get here, the table's mal-formed...
}
return 0;
}
void SegmentArrayProcessor::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
const LookupSegment *segments = segmentArrayLookupTable->segments;
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
const LookupSegment *lookupSegment = segmentArrayLookupTable->lookupSegment(segmentArrayLookupTable, segments, thisGlyph, success);
if (lookupSegment != NULL) {
TTGlyphID firstGlyph = SWAPW(lookupSegment->firstGlyph);
le_int16 offset = SWAPW(lookupSegment->value);
if (offset != 0) {
LEReferenceToArrayOf<TTGlyphID> glyphArray(subtableHeader, success, offset, LE_UNBOUNDED_ARRAY);
if (LE_FAILURE(success)) {
continue;
}
TTGlyphID newGlyph = SWAPW(glyphArray(LE_GET_GLYPH(thisGlyph) - firstGlyph, success));
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
}
U_NAMESPACE_BEGIN
le_uint32 AlternateSubstitutionSubtable::process(const LEReferenceTo<AlternateSubstitutionSubtable> &base,
GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
{
// NOTE: For now, we'll just pick the first alternative...
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(base, glyph, success);
if (coverageIndex >= 0 && LE_SUCCESS(success)) {
le_uint16 altSetCount = SWAPW(alternateSetCount);
if (coverageIndex < altSetCount) {
Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]);
const LEReferenceTo<AlternateSetTable> alternateSetTable(base, success,
(const AlternateSetTable *) ((char *) this + alternateSetTableOffset));
TTGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]);
if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, alternate))) {
glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0]));
}
return 1;
}
// XXXX If we get here, the table's mal-formed...
}
return 0;
}
U_NAMESPACE_BEGIN
le_uint32 LigatureSubstitutionSubtable::process(const LETableReference &base, GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
{
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(base, glyph, success);
if (coverageIndex >= 0) {
Offset ligSetTableOffset = SWAPW(ligSetTableOffsetArray[coverageIndex]);
const LigatureSetTable *ligSetTable = (const LigatureSetTable *) ((char *) this + ligSetTableOffset);
le_uint16 ligCount = SWAPW(ligSetTable->ligatureCount);
for (le_uint16 lig = 0; lig < ligCount; lig += 1) {
Offset ligTableOffset = SWAPW(ligSetTable->ligatureTableOffsetArray[lig]);
const LigatureTable *ligTable = (const LigatureTable *) ((char *)ligSetTable + ligTableOffset);
le_uint16 compCount = SWAPW(ligTable->compCount) - 1;
LEReferenceToArrayOf<TTGlyphID>
componentArrayRef(base, success, ligTable->componentArray, compCount);
if (LE_FAILURE(success)) { return 0; }
le_int32 startPosition = glyphIterator->getCurrStreamPosition();
TTGlyphID ligGlyph = SWAPW(ligTable->ligGlyph);
le_uint16 comp;
for (comp = 0; comp < compCount; comp += 1) {
if (! glyphIterator->next()) {
break;
}
if (LE_GET_GLYPH(glyphIterator->getCurrGlyphID()) != SWAPW(ligTable->componentArray[comp])) {
break;
}
}
if (comp == compCount && (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, ligGlyph)))) {
GlyphIterator tempIterator(*glyphIterator);
TTGlyphID deletedGlyph = tempIterator.ignoresMarks()? 0xFFFE : 0xFFFF;
while (comp > 0) {
tempIterator.setCurrGlyphID(deletedGlyph);
tempIterator.prev();
comp -= 1;
}
tempIterator.setCurrGlyphID(ligGlyph);
return compCount + 1;
}
glyphIterator->setCurrStreamPosition(startPosition);
}
}
return 0;
}
void SimpleArrayProcessor::process(LEGlyphStorage &glyphStorage)
{
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
if (LE_GET_GLYPH(thisGlyph) < 0xFFFF) {
TTGlyphID newGlyph = SWAPW(simpleArrayLookupTable->valueArray[LE_GET_GLYPH(thisGlyph)]);
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
void SimpleArrayProcessor::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
LEReferenceToArrayOf<LookupValue> valueArray(simpleArrayLookupTable, success, (const LookupValue*)&simpleArrayLookupTable->valueArray, LE_UNBOUNDED_ARRAY);
for (glyph = 0; LE_SUCCESS(success) && (glyph < glyphCount); glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
if (LE_GET_GLYPH(thisGlyph) < 0xFFFF) {
TTGlyphID newGlyph = SWAPW(valueArray.getObject(LE_GET_GLYPH(thisGlyph),success));
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
void TrimmedArrayProcessor::process(LEGlyphStorage &glyphStorage)
{
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
TTGlyphID ttGlyph = (TTGlyphID) LE_GET_GLYPH(thisGlyph);
if ((ttGlyph > firstGlyph) && (ttGlyph < lastGlyph)) {
TTGlyphID newGlyph = SWAPW(trimmedArrayLookupTable->valueArray[ttGlyph - firstGlyph]);
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
void SimpleArrayProcessor2::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
if (LE_FAILURE(success)) return;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
if (LE_GET_GLYPH(thisGlyph) < 0xFFFF) {
TTGlyphID newGlyph = SWAPW(valueArray(LE_GET_GLYPH(thisGlyph),success));
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
// This is the really stupid version that doesn't look in any other font for the character...
// It would be better to also look in the "DEFAULT:" font. Another thing to do would be to
// look in all the fonts in some order, script code order being the most obvious...
LEGlyphID ScriptCompositeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
{
UErrorCode error = U_ZERO_ERROR;
LEErrorCode status = LE_NO_ERROR;
le_int32 script = uscript_getScript(ch, &error);
const LEFontInstance *scriptFont = fFontMap->getScriptFont(script, status);
LEGlyphID subFont = LE_SET_SUB_FONT(0, script);
if (LE_FAILURE(status)) {
return subFont;
}
LEGlyphID glyph = scriptFont->mapCharToGlyph(ch);
return LE_SET_GLYPH(subFont, glyph);
}
le_uint32 SingleSubstitutionFormat1Subtable::process(const LEReferenceTo<SingleSubstitutionFormat1Subtable> &base, GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
{
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(base, glyph, success);
if (coverageIndex >= 0) {
TTGlyphID substitute = ((TTGlyphID) LE_GET_GLYPH(glyph)) + SWAPW(deltaGlyphID);
if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute))) {
glyphIterator->setCurrGlyphID(substitute);
}
return 1;
}
return 0;
}
void TrimmedArrayProcessor2::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if(LE_FAILURE(success)) return;
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
TTGlyphID ttGlyph = (TTGlyphID) LE_GET_GLYPH(thisGlyph);
if ((ttGlyph > firstGlyph) && (ttGlyph < lastGlyph)) {
TTGlyphID newGlyph = SWAPW(valueArray(ttGlyph - firstGlyph, success));
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
le_uint32 SingleSubstitutionFormat2Subtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
{
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(glyph);
if (coverageIndex >= 0) {
TTGlyphID substitute = SWAPW(substituteArray[coverageIndex]);
if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute))) {
glyphIterator->setCurrGlyphID(substitute);
}
return 1;
}
return 0;
}
void SegmentSingleProcessor::process(LEGlyphStorage &glyphStorage)
{
const LookupSegment *segments = segmentSingleLookupTable->segments;
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
const LookupSegment *lookupSegment = segmentSingleLookupTable->lookupSegment(segments, thisGlyph);
if (lookupSegment != NULL) {
TTGlyphID newGlyph = (TTGlyphID) LE_GET_GLYPH(thisGlyph) + SWAPW(lookupSegment->value);
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
void SegmentSingleProcessor2::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
const LookupSegment *segments = segmentSingleLookupTable->segments;
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
if (LE_FAILURE(success)) return;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
const LookupSegment *lookupSegment = segmentSingleLookupTable->lookupSegment(segmentSingleLookupTable, segments, thisGlyph, success);
if (lookupSegment != NULL && LE_SUCCESS(success)) {
TTGlyphID newGlyph = (TTGlyphID) LE_GET_GLYPH(thisGlyph) + SWAPW(lookupSegment->value);
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
void SegmentArrayProcessor::process(LEGlyphStorage &glyphStorage)
{
const LookupSegment *segments = segmentArrayLookupTable->segments;
le_int32 glyphCount = glyphStorage.getGlyphCount();
le_int32 glyph;
for (glyph = 0; glyph < glyphCount; glyph += 1) {
LEGlyphID thisGlyph = glyphStorage[glyph];
const LookupSegment *lookupSegment = segmentArrayLookupTable->lookupSegment(segments, thisGlyph);
if (lookupSegment != NULL) {
TTGlyphID firstGlyph = SWAPW(lookupSegment->firstGlyph);
le_int16 offset = SWAPW(lookupSegment->value);
if (offset != 0) {
TTGlyphID *glyphArray = (TTGlyphID *) ((char *) subtableHeader + offset);
TTGlyphID newGlyph = SWAPW(glyphArray[LE_GET_GLYPH(thisGlyph) - firstGlyph]);
glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
}
}
}
}
void GlyphIterator::setCurrGlyphID(TTGlyphID glyphID)
{
LEGlyphID glyph = glyphStorage[position];
glyphStorage[position] = LE_SET_GLYPH(glyph, glyphID);
}
// apply GPOS table, if any
void OpenTypeLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if (LE_FAILURE(success)) {
return;
}
if (chars == NULL || offset < 0 || count < 0) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return;
}
le_int32 glyphCount = glyphStorage.getGlyphCount();
if (glyphCount == 0) {
return;
}
if (fGPOSTable != NULL) {
GlyphPositionAdjustments *adjustments = new GlyphPositionAdjustments(glyphCount);
le_int32 i;
if (adjustments == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return;
}
#if 0
// Don't need to do this if we allocate
// the adjustments array w/ new...
for (i = 0; i < glyphCount; i += 1) {
adjustments->setXPlacement(i, 0);
adjustments->setYPlacement(i, 0);
adjustments->setXAdvance(i, 0);
adjustments->setYAdvance(i, 0);
adjustments->setBaseOffset(i, -1);
}
#endif
if (fGPOSTable != NULL) {
if (fScriptTagV2 != nullScriptTag && fGPOSTable->coversScriptAndLanguage(fScriptTagV2,fLangSysTag)) {
fGPOSTable->process(glyphStorage, adjustments, reverse, fScriptTagV2, fLangSysTag, fGDEFTable, success, fFontInstance,
fFeatureMap, fFeatureMapCount, fFeatureOrder);
} else {
fGPOSTable->process(glyphStorage, adjustments, reverse, fScriptTag, fLangSysTag, fGDEFTable, success, fFontInstance,
fFeatureMap, fFeatureMapCount, fFeatureOrder);
}
} else if ( fTypoFlags & 0x1 ) {
static const le_uint32 kernTableTag = LE_KERN_TABLE_TAG;
KernTable kt(fFontInstance, getFontTable(kernTableTag));
kt.process(glyphStorage);
}
float xAdjust = 0, yAdjust = 0;
for (i = 0; i < glyphCount; i += 1) {
float xAdvance = adjustments->getXAdvance(i);
float yAdvance = adjustments->getYAdvance(i);
float xPlacement = 0;
float yPlacement = 0;
#if 0
// This is where separate kerning adjustments
// should get applied.
xAdjust += xKerning;
yAdjust += yKerning;
#endif
for (le_int32 base = i; base >= 0; base = adjustments->getBaseOffset(base)) {
xPlacement += adjustments->getXPlacement(base);
yPlacement += adjustments->getYPlacement(base);
}
xPlacement = fFontInstance->xUnitsToPoints(xPlacement);
yPlacement = fFontInstance->yUnitsToPoints(yPlacement);
glyphStorage.adjustPosition(i, xAdjust + xPlacement, -(yAdjust + yPlacement), success);
xAdjust += fFontInstance->xUnitsToPoints(xAdvance);
yAdjust += fFontInstance->yUnitsToPoints(yAdvance);
}
glyphStorage.adjustPosition(glyphCount, xAdjust, -yAdjust, success);
delete adjustments;
} else {
// if there was no GPOS table, maybe there's non-OpenType kerning we can use
// Google Patch: disable this. Causes problems with Tamil.
// Umesh says layout is poor both with and without the change, but
// worse with the change. See ocean/imageprocessing/layout_test_unittest.cc
// Public ICU ticket for this problem is #7742
// LayoutEngine::adjustGlyphPositions(chars, offset, count, reverse, glyphStorage, success);
}
LEGlyphID zwnj = fFontInstance->mapCharToGlyph(0x200C);
if (zwnj != 0x0000) {
for (le_int32 g = 0; g < glyphCount; g += 1) {
LEGlyphID glyph = glyphStorage[g];
if (glyph == zwnj) {
glyphStorage[g] = LE_SET_GLYPH(glyph, 0xFFFF);
}
}
}
#if 0
// Don't know why this is here...
LE_DELETE_ARRAY(fFeatureTags);
fFeatureTags = NULL;
#endif
}
ByteOffset LigatureSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index)
{
LEErrorCode success = LE_NO_ERROR;
const LigatureSubstitutionStateEntry *entry = entryTable.getAlias(index, success);
ByteOffset newState = SWAPW(entry->newStateOffset);
le_int16 flags = SWAPW(entry->flags);
if (flags & lsfSetComponent) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = currGlyph;
} else if ( m == -1) {
// bad font- skip this glyph.
currGlyph++;
return newState;
}
ByteOffset actionOffset = flags & lsfActionOffsetMask;
if (actionOffset != 0) {
LEReferenceTo<LigatureActionEntry> ap(stHeader, success, actionOffset);
LigatureActionEntry action;
le_int32 offset, i = 0;
le_int32 stack[nComponents];
le_int16 mm = -1;
do {
le_uint32 componentGlyph = componentStack[m--];
action = SWAPL(*ap.getAlias());
ap.addObject(success); // ap++
if (m < 0) {
m = nComponents - 1;
}
offset = action & lafComponentOffsetMask;
if (offset != 0) {
LEReferenceToArrayOf<le_int16> offsetTable(stHeader, success, 2 * SignExtend(offset, lafComponentOffsetMask), LE_UNBOUNDED_ARRAY);
if(LE_FAILURE(success)) {
currGlyph++;
LE_DEBUG_BAD_FONT("off end of ligature substitution header");
return newState; // get out! bad font
}
if(componentGlyph > glyphStorage.getGlyphCount()) {
LE_DEBUG_BAD_FONT("preposterous componentGlyph");
currGlyph++;
return newState; // get out! bad font
}
i += SWAPW(offsetTable.getObject(LE_GET_GLYPH(glyphStorage[componentGlyph]), success));
if (action & (lafLast | lafStore)) {
LEReferenceTo<TTGlyphID> ligatureOffset(stHeader, success, i);
TTGlyphID ligatureGlyph = SWAPW(*ligatureOffset.getAlias());
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], ligatureGlyph);
if(mm==nComponents) {
LE_DEBUG_BAD_FONT("exceeded nComponents");
mm--; // don't overrun the stack.
}
stack[++mm] = componentGlyph;
i = 0;
} else {
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], 0xFFFF);
}
}
#if LE_ASSERT_BAD_FONT
if(m<0) {
LE_DEBUG_BAD_FONT("m<0")
}
#endif
} while (!(action & lafLast) && (m>=0) ); // stop if last bit is set, or if run out of items
while (mm >= 0) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = stack[mm--];
}
}
U_NAMESPACE_BEGIN
le_uint32 MultipleSubstitutionSubtable::process(const LETableReference &base, GlyphIterator *glyphIterator, LEErrorCode& success, const LEGlyphFilter *filter) const
{
if (LE_FAILURE(success)) {
return 0;
}
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
// If there's a filter, we only want to do the
// substitution if the *input* glyphs doesn't
// exist.
//
// FIXME: is this always the right thing to do?
// FIXME: should this only be done for a non-zero
// glyphCount?
if (filter != NULL && filter->accept(glyph)) {
return 0;
}
le_int32 coverageIndex = getGlyphCoverage(base, glyph, success);
le_uint16 seqCount = SWAPW(sequenceCount);
LEReferenceToArrayOf<Offset>
sequenceTableOffsetArrayRef(base, success, sequenceTableOffsetArray, seqCount);
if (LE_FAILURE(success)) {
return 0;
}
if (coverageIndex >= 0 && coverageIndex < seqCount) {
Offset sequenceTableOffset = SWAPW(sequenceTableOffsetArray[coverageIndex]);
const SequenceTable *sequenceTable = (const SequenceTable *) ((char *) this + sequenceTableOffset);
le_uint16 glyphCount = SWAPW(sequenceTable->glyphCount);
if (glyphCount == 0) {
glyphIterator->setCurrGlyphID(0xFFFF);
return 1;
} else if (glyphCount == 1) {
TTGlyphID substitute = SWAPW(sequenceTable->substituteArray[0]);
if (filter != NULL && ! filter->accept(LE_SET_GLYPH(glyph, substitute))) {
return 0;
}
glyphIterator->setCurrGlyphID(substitute);
return 1;
} else {
// If there's a filter, make sure all of the output glyphs
// exist.
if (filter != NULL) {
for (le_int32 i = 0; i < glyphCount; i += 1) {
TTGlyphID substitute = SWAPW(sequenceTable->substituteArray[i]);
if (! filter->accept(substitute)) {
return 0;
}
}
}
LEGlyphID *newGlyphs = glyphIterator->insertGlyphs(glyphCount, success);
if (LE_FAILURE(success)) {
return 0;
}
le_int32 insert = 0, direction = 1;
if (glyphIterator->isRightToLeft()) {
insert = glyphCount - 1;
direction = -1;
}
for (le_int32 i = 0; i < glyphCount; i += 1) {
TTGlyphID substitute = SWAPW(sequenceTable->substituteArray[i]);
newGlyphs[insert] = LE_SET_GLYPH(glyph, substitute);
insert += direction;
}
return 1;
}
}
return 0;
}
le_uint16 LigatureSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index, LEErrorCode &success)
{
const LigatureSubstitutionStateEntry2 *entry = entryTable.getAlias(index, success);
if(LE_FAILURE(success)) return 0;
le_uint16 nextStateIndex = SWAPW(entry->nextStateIndex);
le_uint16 flags = SWAPW(entry->entryFlags);
le_uint16 ligActionIndex = SWAPW(entry->ligActionIndex);
if (flags & lsfSetComponent) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = currGlyph;
} else if ( m == -1) {
// bad font- skip this glyph.
//LE_DEBUG_BAD_FONT("m==-1 (componentCount went negative)")
currGlyph+= dir;
return nextStateIndex;
}
ByteOffset actionOffset = flags & lsfPerformAction;
if (actionOffset != 0) {
LEReferenceTo<LigatureActionEntry> ap(stHeader, success, ligActionOffset); // byte offset
if (LE_FAILURE(success)) {
currGlyph+= dir;
return nextStateIndex;
}
ap.addObject(ligActionIndex, success);
LEReferenceToArrayOf<TTGlyphID> ligatureTable(stHeader, success, ligatureOffset, LE_UNBOUNDED_ARRAY);
LigatureActionEntry action;
le_int32 offset, i = 0, j = 0;
le_int32 stack[nComponents];
le_int16 mm = -1;
LEReferenceToArrayOf<le_uint16> componentTable(stHeader, success, componentOffset, LE_UNBOUNDED_ARRAY);
if(LE_FAILURE(success)) {
currGlyph+= dir;
return nextStateIndex; // get out! bad font
}
do {
le_uint32 componentGlyph = componentStack[m--]; // pop off
if (j++ > 0) {
ap.addObject(success);
}
if (LE_FAILURE(success)) {
currGlyph+= dir;
return nextStateIndex;
}
action = SWAPL(*ap.getAlias());
if (m < 0) {
m = nComponents - 1;
}
offset = action & lafComponentOffsetMask;
if (offset != 0) {
if(componentGlyph >= glyphStorage.getGlyphCount()) {
LE_DEBUG_BAD_FONT("preposterous componentGlyph");
currGlyph+= dir;
return nextStateIndex; // get out! bad font
}
i += SWAPW(componentTable(LE_GET_GLYPH(glyphStorage[componentGlyph]) + (SignExtend(offset, lafComponentOffsetMask)),success));
if (LE_FAILURE(success)) {
currGlyph+= dir;
return nextStateIndex;
}
if (action & (lafLast | lafStore)) {
TTGlyphID ligatureGlyph = SWAPW(ligatureTable(i,success));
if (LE_FAILURE(success)) {
currGlyph+= dir;
return nextStateIndex;
}
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], ligatureGlyph);
if(mm==nComponents) {
LE_DEBUG_BAD_FONT("exceeded nComponents");
mm--; // don't overrun the stack.
}
stack[++mm] = componentGlyph;
i = 0;
} else {
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], 0xFFFF);
}
}
#if LE_ASSERT_BAD_FONT
if(m<0) {
LE_DEBUG_BAD_FONT("m<0")
}
#endif
} while (LE_SUCCESS(success) && !(action & lafLast) && (m>=0) ); // stop if last bit is set, or if run out of items
while (mm >= 0) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = stack[mm--];
}
}
// apply GPOS table, if any
void OpenTypeLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if (LE_FAILURE(success)) {
return;
}
if (chars == NULL || offset < 0 || count < 0) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return;
}
le_int32 glyphCount = glyphStorage.getGlyphCount();
if (glyphCount == 0) {
return;
}
if (!fGPOSTable.isEmpty()) {
GlyphPositionAdjustments *adjustments = new GlyphPositionAdjustments(glyphCount);
le_int32 i;
if (adjustments == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return;
}
#if 0
// Don't need to do this if we allocate
// the adjustments array w/ new...
for (i = 0; i < glyphCount; i += 1) {
adjustments->setXPlacement(i, 0);
adjustments->setYPlacement(i, 0);
adjustments->setXAdvance(i, 0);
adjustments->setYAdvance(i, 0);
adjustments->setBaseOffset(i, -1);
}
#endif
if (!fGPOSTable.isEmpty()) {
if (fScriptTagV2 != nullScriptTag &&
fGPOSTable->coversScriptAndLanguage(fGPOSTable, fScriptTagV2,fLangSysTag,success)) {
fGPOSTable->process(fGPOSTable, glyphStorage, adjustments, reverse, fScriptTagV2, fLangSysTag,
fGDEFTable, success, fFontInstance, fFeatureMap, fFeatureMapCount, fFeatureOrder);
} else {
fGPOSTable->process(fGPOSTable, glyphStorage, adjustments, reverse, fScriptTag, fLangSysTag,
fGDEFTable, success, fFontInstance, fFeatureMap, fFeatureMapCount, fFeatureOrder);
}
} else if (fTypoFlags & LE_Kerning_FEATURE_FLAG) { /* kerning enabled */
LETableReference kernTable(fFontInstance, LE_KERN_TABLE_TAG, success);
KernTable kt(kernTable, success);
kt.process(glyphStorage, success);
}
float xAdjust = 0, yAdjust = 0;
for (i = 0; i < glyphCount; i += 1) {
float xAdvance = adjustments->getXAdvance(i);
float yAdvance = adjustments->getYAdvance(i);
float xPlacement = 0;
float yPlacement = 0;
#if 0
// This is where separate kerning adjustments
// should get applied.
xAdjust += xKerning;
yAdjust += yKerning;
#endif
for (le_int32 base = i; base >= 0; base = adjustments->getBaseOffset(base)) {
xPlacement += adjustments->getXPlacement(base);
yPlacement += adjustments->getYPlacement(base);
}
xPlacement = fFontInstance->xUnitsToPoints(xPlacement);
yPlacement = fFontInstance->yUnitsToPoints(yPlacement);
glyphStorage.adjustPosition(i, xAdjust + xPlacement, -(yAdjust + yPlacement), success);
xAdjust += fFontInstance->xUnitsToPoints(xAdvance);
yAdjust += fFontInstance->yUnitsToPoints(yAdvance);
}
glyphStorage.adjustPosition(glyphCount, xAdjust, -yAdjust, success);
delete adjustments;
} else {
// if there was no GPOS table, maybe there's non-OpenType kerning we can use
LayoutEngine::adjustGlyphPositions(chars, offset, count, reverse, glyphStorage, success);
}
LEGlyphID zwnj = fFontInstance->mapCharToGlyph(0x200C);
if (zwnj != 0x0000) {
for (le_int32 g = 0; g < glyphCount; g += 1) {
LEGlyphID glyph = glyphStorage[g];
if (glyph == zwnj) {
glyphStorage[g] = LE_SET_GLYPH(glyph, 0xFFFF);
}
}
}
#if 0
// Don't know why this is here...
LE_DELETE_ARRAY(fFeatureTags);
fFeatureTags = NULL;
#endif
}
ByteOffset LigatureSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index)
{
const LigatureSubstitutionStateEntry *entry = &entryTable[index];
ByteOffset newState = SWAPW(entry->newStateOffset);
le_int16 flags = SWAPW(entry->flags);
if (flags & lsfSetComponent) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = currGlyph;
}
ByteOffset actionOffset = flags & lsfActionOffsetMask;
if (actionOffset != 0) {
const LigatureActionEntry *ap = (const LigatureActionEntry *) ((char *) &ligatureSubstitutionHeader->stHeader + actionOffset);
LigatureActionEntry action;
le_int32 offset, i = 0;
le_int32 stack[nComponents];
le_int16 mm = -1;
do {
le_uint32 componentGlyph = componentStack[m--];
action = SWAPL(*ap++);
if (m < 0) {
m = nComponents - 1;
}
offset = action & lafComponentOffsetMask;
if (offset != 0) {
const le_int16 *offsetTable = (const le_int16 *)((char *) &ligatureSubstitutionHeader->stHeader + 2 * SignExtend(offset, lafComponentOffsetMask));
i += SWAPW(offsetTable[LE_GET_GLYPH(glyphStorage[componentGlyph])]);
if (action & (lafLast | lafStore)) {
const TTGlyphID *ligatureOffset = (const TTGlyphID *) ((char *) &ligatureSubstitutionHeader->stHeader + i);
TTGlyphID ligatureGlyph = SWAPW(*ligatureOffset);
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], ligatureGlyph);
stack[++mm] = componentGlyph;
i = 0;
} else {
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], 0xFFFF);
}
}
} while (!(action & lafLast));
while (mm >= 0) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = stack[mm--];
}
}
if (!(flags & lsfDontAdvance)) {
// should handle reverse too!
currGlyph += 1;
}
return newState;
}
le_uint16 LigatureSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index)
{
const LigatureSubstitutionStateEntry2 *entry = &entryTable[index];
le_uint16 nextStateIndex = SWAPW(entry->nextStateIndex);
le_uint16 flags = SWAPW(entry->entryFlags);
le_uint16 ligActionIndex = SWAPW(entry->ligActionIndex);
if (flags & lsfSetComponent) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = currGlyph;
}
ByteOffset actionOffset = flags & lsfPerformAction;
if (actionOffset != 0) {
const LigatureActionEntry *ap = (const LigatureActionEntry *) ((char *) &ligatureSubstitutionHeader->stHeader + ligActionOffset) + ligActionIndex;
const TTGlyphID *ligatureTable = (const TTGlyphID *) ((char *) &ligatureSubstitutionHeader->stHeader + ligatureOffset);
LigatureActionEntry action;
le_int32 offset, i = 0;
le_int32 stack[nComponents];
le_int16 mm = -1;
const le_uint16 *componentTable = (const le_uint16 *)((char *) &ligatureSubstitutionHeader->stHeader + componentOffset);
do {
le_uint32 componentGlyph = componentStack[m--]; // pop off
action = SWAPL(*ap++);
if (m < 0) {
m = nComponents - 1;
}
offset = action & lafComponentOffsetMask;
if (offset != 0) {
i += SWAPW(componentTable[LE_GET_GLYPH(glyphStorage[componentGlyph]) + (SignExtend(offset, lafComponentOffsetMask))]);
if (action & (lafLast | lafStore)) {
TTGlyphID ligatureGlyph = SWAPW(ligatureTable[i]);
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], ligatureGlyph);
stack[++mm] = componentGlyph;
i = 0;
} else {
glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], 0xFFFF);
}
}
} while (!(action & lafLast));
while (mm >= 0) {
if (++m >= nComponents) {
m = 0;
}
componentStack[m] = stack[mm--];
}
}
if (!(flags & lsfDontAdvance)) {
currGlyph += dir;
}
return nextStateIndex;
}
