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/*
* (C) Copyright IBM Corp. and others 1998 - 2013 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LayoutTables.h"
#include "MorphTables.h"
#include "SubtableProcessor2.h"
#include "IndicRearrangementProcessor2.h"
#include "ContextualGlyphSubstProc2.h"
#include "LigatureSubstProc2.h"
#include "NonContextualGlyphSubstProc2.h"
#include "ContextualGlyphInsertionProc2.h"
#include "LEGlyphStorage.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
void MorphTableHeader2::process(const LEReferenceTo<MorphTableHeader2> &base, LEGlyphStorage &glyphStorage,
le_int32 typoFlags, LEErrorCode &success) const
{
if(LE_FAILURE(success)) return;
le_uint32 chainCount = SWAPL(this->nChains);
LEReferenceTo<ChainHeader2> chainHeader(base, success, &chains[0]);
/* chainHeader and subtableHeader are implemented as a moving pointer rather than an array dereference
* to (slightly) reduce code churn. However, must be careful to preincrement them the 2nd time through.
* We don't want to increment them at the end of the loop, as that would attempt to dereference
* out of range memory.
*/
le_uint32 chain;
for (chain = 0; LE_SUCCESS(success) && (chain < chainCount); chain++) {
if (chain>0) {
le_uint32 chainLength = SWAPL(chainHeader->chainLength);
chainHeader.addOffset(chainLength, success); // Don't increment the first time
}
FeatureFlags flag = SWAPL(chainHeader->defaultFlags);
le_uint32 nFeatureEntries = SWAPL(chainHeader->nFeatureEntries);
le_uint32 nSubtables = SWAPL(chainHeader->nSubtables);
LEReferenceTo<MorphSubtableHeader2> subtableHeader(chainHeader,
success, (const MorphSubtableHeader2 *)&chainHeader->featureTable[nFeatureEntries]);
le_uint32 subtable;
if(LE_FAILURE(success)) break; // malformed table
if (typoFlags != 0) {
le_uint32 featureEntry;
LEReferenceToArrayOf<FeatureTableEntry> featureTableRef(chainHeader, success, &chainHeader->featureTable[0], nFeatureEntries);
if(LE_FAILURE(success)) break;
// Feature subtables
for (featureEntry = 0; featureEntry < nFeatureEntries; featureEntry++) {
const FeatureTableEntry &featureTableEntry = featureTableRef(featureEntry, success);
le_int16 featureType = SWAPW(featureTableEntry.featureType);
le_int16 featureSetting = SWAPW(featureTableEntry.featureSetting);
le_uint32 enableFlags = SWAPL(featureTableEntry.enableFlags);
le_uint32 disableFlags = SWAPL(featureTableEntry.disableFlags);
switch (featureType) {
case ligaturesType:
if ((typoFlags & LE_Ligatures_FEATURE_ENUM ) && (featureSetting ^ 0x1)){
flag &= disableFlags;
flag |= enableFlags;
} else {
if (((typoFlags & LE_RLIG_FEATURE_FLAG) && featureSetting == requiredLigaturesOnSelector) ||
((typoFlags & LE_CLIG_FEATURE_FLAG) && featureSetting == contextualLigaturesOnSelector) ||
((typoFlags & LE_HLIG_FEATURE_FLAG) && featureSetting == historicalLigaturesOnSelector) ||
((typoFlags & LE_LIGA_FEATURE_FLAG) && featureSetting == commonLigaturesOnSelector)) {
flag &= disableFlags;
flag |= enableFlags;
}
}
break;
case letterCaseType:
if ((typoFlags & LE_SMCP_FEATURE_FLAG) && featureSetting == smallCapsSelector) {
flag &= disableFlags;
flag |= enableFlags;
}
break;
case verticalSubstitutionType:
break;
case linguisticRearrangementType:
break;
case numberSpacingType:
break;
case smartSwashType:
if ((typoFlags & LE_SWSH_FEATURE_FLAG) && (featureSetting ^ 0x1)){
flag &= disableFlags;
flag |= enableFlags;
}
break;
case diacriticsType:
break;
case verticalPositionType:
break;
case fractionsType:
if (((typoFlags & LE_FRAC_FEATURE_FLAG) && featureSetting == diagonalFractionsSelector) ||
((typoFlags & LE_AFRC_FEATURE_FLAG) && featureSetting == verticalFractionsSelector)) {
flag &= disableFlags;
flag |= enableFlags;
} else {
flag &= disableFlags;
}
break;
case typographicExtrasType:
if ((typoFlags & LE_ZERO_FEATURE_FLAG) && featureSetting == slashedZeroOnSelector) {
flag &= disableFlags;
flag |= enableFlags;
}
break;
case mathematicalExtrasType:
break;
case ornamentSetsType:
break;
case characterAlternativesType:
break;
case designComplexityType:
if (((typoFlags & LE_SS01_FEATURE_FLAG) && featureSetting == designLevel1Selector) ||
((typoFlags & LE_SS02_FEATURE_FLAG) && featureSetting == designLevel2Selector) ||
((typoFlags & LE_SS03_FEATURE_FLAG) && featureSetting == designLevel3Selector) ||
((typoFlags & LE_SS04_FEATURE_FLAG) && featureSetting == designLevel4Selector) ||
((typoFlags & LE_SS05_FEATURE_FLAG) && featureSetting == designLevel5Selector) ||
((typoFlags & LE_SS06_FEATURE_FLAG) && featureSetting == designLevel6Selector) ||
((typoFlags & LE_SS07_FEATURE_FLAG) && featureSetting == designLevel7Selector)) {
flag &= disableFlags;
flag |= enableFlags;
}
break;
case styleOptionsType:
break;
case characterShapeType:
break;
case numberCaseType:
break;
case textSpacingType:
break;
case transliterationType:
break;
case annotationType:
if ((typoFlags & LE_NALT_FEATURE_FLAG) && featureSetting == circleAnnotationSelector) {
flag &= disableFlags;
flag |= enableFlags;
}
break;
case kanaSpacingType:
break;
case ideographicSpacingType:
break;
case rubyKanaType:
if ((typoFlags & LE_RUBY_FEATURE_FLAG) && featureSetting == rubyKanaOnSelector) {
flag &= disableFlags;
flag |= enableFlags;
}
break;
case cjkRomanSpacingType:
break;
default:
break;
}
}
}
for (subtable = 0; LE_SUCCESS(success) && subtable < nSubtables; subtable++) {
if(subtable>0) {
le_uint32 length = SWAPL(subtableHeader->length);
subtableHeader.addOffset(length, success); // Don't addOffset for the last entry.
}
le_uint32 coverage = SWAPL(subtableHeader->coverage);
FeatureFlags subtableFeatures = SWAPL(subtableHeader->subtableFeatures);
// should check coverage more carefully...
if (((coverage & scfIgnoreVt2) || !(coverage & scfVertical2)) && (subtableFeatures & flag) != 0) {
subtableHeader->process(subtableHeader, glyphStorage, success);
}
}
}
}
void MorphSubtableHeader2::process(const LEReferenceTo<MorphSubtableHeader2> &base, LEGlyphStorage &glyphStorage, LEErrorCode &success) const
{
SubtableProcessor2 *processor = NULL;
switch (SWAPL(coverage) & scfTypeMask2)
{
case mstIndicRearrangement:
processor = new IndicRearrangementProcessor2(base, success);
break;
case mstContextualGlyphSubstitution:
processor = new ContextualGlyphSubstitutionProcessor2(base, success);
break;
case mstLigatureSubstitution:
processor = new LigatureSubstitutionProcessor2(base, success);
break;
case mstReservedUnused:
break;
case mstNonContextualGlyphSubstitution:
processor = NonContextualGlyphSubstitutionProcessor2::createInstance(base, success);
break;
case mstContextualGlyphInsertion:
processor = new ContextualGlyphInsertionProcessor2(base, success);
break;
default:
return;
break; /*NOTREACHED*/
}
if (processor != NULL) {
processor->process(glyphStorage, success);
delete processor;
} else {
if(LE_SUCCESS(success)) {
success = LE_MEMORY_ALLOCATION_ERROR; // because ptr is null and we didn't break out.
}
}
}
U_NAMESPACE_END
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