/*
*
- * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
+ * (C) Copyright IBM Corp. and others 1998-2015 - All Rights Reserved
*
*/
#include "OpenTypeUtilities.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
-#include "Features.h"
+#include "ICUFeatures.h"
#include "Lookups.h"
#include "ScriptAndLanguage.h"
#include "GlyphDefinitionTables.h"
U_NAMESPACE_BEGIN
-le_uint32 LookupProcessor::applyLookupTable(const LookupTable *lookupTable, GlyphIterator *glyphIterator,
- const LEFontInstance *fontInstance) const
+le_uint32 LookupProcessor::applyLookupTable(const LEReferenceTo<LookupTable> &lookupTable, GlyphIterator *glyphIterator,
+ const LEFontInstance *fontInstance, LEErrorCode& success) const
{
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+
le_uint16 lookupType = SWAPW(lookupTable->lookupType);
le_uint16 subtableCount = SWAPW(lookupTable->subTableCount);
le_int32 startPosition = glyphIterator->getCurrStreamPosition();
le_uint32 delta;
for (le_uint16 subtable = 0; subtable < subtableCount; subtable += 1) {
- const LookupSubtable *lookupSubtable = lookupTable->getLookupSubtable(subtable);
+ LEReferenceTo<LookupSubtable> lookupSubtable = lookupTable->getLookupSubtable(lookupTable, subtable, success);
- delta = applySubtable(lookupSubtable, lookupType, glyphIterator, fontInstance);
+ delta = applySubtable(lookupSubtable, lookupType, glyphIterator, fontInstance, success);
- if (delta > 0) {
+ if (delta > 0 && LE_FAILURE(success)) {
return 1;
}
}
le_int32 LookupProcessor::process(LEGlyphStorage &glyphStorage, GlyphPositionAdjustments *glyphPositionAdjustments,
- le_bool rightToLeft, const GlyphDefinitionTableHeader *glyphDefinitionTableHeader,
- const LEFontInstance *fontInstance) const
+ le_bool rightToLeft, const LEReferenceTo<GlyphDefinitionTableHeader> &glyphDefinitionTableHeader,
+ const LEFontInstance *fontInstance, LEErrorCode& success) const
{
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+
le_int32 glyphCount = glyphStorage.getGlyphCount();
if (lookupSelectArray == NULL) {
rightToLeft, 0, 0, glyphDefinitionTableHeader);
le_int32 newGlyphCount = glyphCount;
- for (le_uint16 order = 0; order < lookupOrderCount; order += 1) {
+ for (le_uint16 order = 0; order < lookupOrderCount && LE_SUCCESS(success); order += 1) {
le_uint16 lookup = lookupOrderArray[order];
FeatureMask selectMask = lookupSelectArray[lookup];
if (selectMask != 0) {
- const LookupTable *lookupTable = lookupListTable->getLookupTable(lookup);
+ const LEReferenceTo<LookupTable> lookupTable = lookupListTable->getLookupTable(lookupListTable, lookup, success);
+ if (!lookupTable.isValid() ||LE_FAILURE(success) ) {
+ continue;
+ }
le_uint16 lookupFlags = SWAPW(lookupTable->lookupFlags);
glyphIterator.reset(lookupFlags, selectMask);
while (glyphIterator.findFeatureTag()) {
- le_uint32 delta = 1;
-
- while (glyphIterator.next(delta)) {
- delta = applyLookupTable(lookupTable, &glyphIterator, fontInstance);
+ applyLookupTable(lookupTable, &glyphIterator, fontInstance, success);
+ if (LE_FAILURE(success)) {
+ return 0;
}
}
}
le_uint32 LookupProcessor::applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator,
- const LEFontInstance *fontInstance) const
+ const LEFontInstance *fontInstance, LEErrorCode& success) const
{
- const LookupTable *lookupTable = lookupListTable->getLookupTable(lookupTableIndex);
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+
+ const LEReferenceTo<LookupTable> lookupTable = lookupListTable->getLookupTable(lookupListTable, lookupTableIndex, success);
+ if (!lookupTable.isValid()) {
+ success = LE_INTERNAL_ERROR;
+ return 0;
+ }
le_uint16 lookupFlags = SWAPW(lookupTable->lookupFlags);
GlyphIterator tempIterator(*glyphIterator, lookupFlags);
- le_uint32 delta = applyLookupTable(lookupTable, &tempIterator, fontInstance);
+ le_uint32 delta = applyLookupTable(lookupTable, &tempIterator, fontInstance, success);
return delta;
}
-le_int32 LookupProcessor::selectLookups(const FeatureTable *featureTable, FeatureMask featureMask, le_int32 order)
+le_int32 LookupProcessor::selectLookups(const LEReferenceTo<FeatureTable> &featureTable, FeatureMask featureMask, le_int32 order, LEErrorCode &success)
{
- le_uint16 lookupCount = featureTable? SWAPW(featureTable->lookupCount) : 0;
- le_int32 store = order;
-
- for (le_uint16 lookup = 0; lookup < lookupCount; lookup += 1) {
- le_uint16 lookupListIndex = SWAPW(featureTable->lookupListIndexArray[lookup]);
-
- lookupSelectArray[lookupListIndex] |= featureMask;
- lookupOrderArray[store++] = lookupListIndex;
+ le_uint16 lookupCount = featureTable.isValid()? SWAPW(featureTable->lookupCount) : 0;
+ le_uint32 store = (le_uint32)order;
+
+ LEReferenceToArrayOf<le_uint16> lookupListIndexArray(featureTable, success, featureTable->lookupListIndexArray, lookupCount);
+
+ for (le_uint16 lookup = 0; LE_SUCCESS(success) && lookup < lookupCount; lookup += 1) {
+ le_uint16 lookupListIndex = SWAPW(lookupListIndexArray.getObject(lookup,success));
+ if (lookupListIndex >= lookupSelectCount) {
+ continue;
+ }
+ if (store >= lookupOrderCount) {
+ continue;
+ }
+
+ lookupSelectArray[lookupListIndex] |= featureMask;
+ lookupOrderArray[store++] = lookupListIndex;
}
return store - order;
}
-LookupProcessor::LookupProcessor(const char *baseAddress,
+LookupProcessor::LookupProcessor(const LETableReference &baseAddress,
Offset scriptListOffset, Offset featureListOffset, Offset lookupListOffset,
- LETag scriptTag, LETag languageTag, const FeatureMap *featureMap, le_int32 featureMapCount, le_bool orderFeatures)
- : lookupListTable(NULL), featureListTable(NULL), lookupSelectArray(NULL),
- lookupOrderArray(NULL), lookupOrderCount(0)
+ LETag scriptTag, LETag languageTag, const FeatureMap *featureMap, le_int32 featureMapCount, le_bool orderFeatures,
+ LEErrorCode& success)
+ : lookupListTable(), featureListTable(), lookupSelectArray(NULL), lookupSelectCount(0),
+ lookupOrderArray(NULL), lookupOrderCount(0), fReference(baseAddress)
{
- const ScriptListTable *scriptListTable = NULL;
- const LangSysTable *langSysTable = NULL;
+ LEReferenceTo<ScriptListTable> scriptListTable;
+ LEReferenceTo<LangSysTable> langSysTable;
le_uint16 featureCount = 0;
le_uint16 lookupListCount = 0;
le_uint16 requiredFeatureIndex;
+ if (LE_FAILURE(success)) {
+ return;
+ }
+
if (scriptListOffset != 0) {
- scriptListTable = (const ScriptListTable *) (baseAddress + scriptListOffset);
- langSysTable = scriptListTable->findLanguage(scriptTag, languageTag);
+ scriptListTable = LEReferenceTo<ScriptListTable>(baseAddress, success, scriptListOffset);
+ langSysTable = scriptListTable->findLanguage(scriptListTable, scriptTag, languageTag, success);
- if (langSysTable != 0) {
- featureCount = SWAPW(langSysTable->featureCount);
- }
+ if (langSysTable.isValid() && LE_SUCCESS(success)) {
+ featureCount = SWAPW(langSysTable->featureCount);
+ }
}
if (featureListOffset != 0) {
- featureListTable = (const FeatureListTable *) (baseAddress + featureListOffset);
+ featureListTable = LEReferenceTo<FeatureListTable>(baseAddress, success, featureListOffset);
}
if (lookupListOffset != 0) {
- lookupListTable = (const LookupListTable *) (baseAddress + lookupListOffset);
+ lookupListTable = LEReferenceTo<LookupListTable>(baseAddress,success, lookupListOffset);
+ if(LE_SUCCESS(success) && lookupListTable.isValid()) {
lookupListCount = SWAPW(lookupListTable->lookupCount);
+ }
}
- if (langSysTable == NULL || featureListTable == NULL || lookupListTable == NULL ||
+ if (langSysTable.isEmpty() || featureListTable.isEmpty() || lookupListTable.isEmpty() ||
featureCount == 0 || lookupListCount == 0) {
return;
}
- requiredFeatureIndex = SWAPW(langSysTable->reqFeatureIndex);
+ if(langSysTable.isValid()) {
+ requiredFeatureIndex = SWAPW(langSysTable->reqFeatureIndex);
+ }
lookupSelectArray = LE_NEW_ARRAY(FeatureMask, lookupListCount);
+ if (lookupSelectArray == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
for (int i = 0; i < lookupListCount; i += 1) {
lookupSelectArray[i] = 0;
}
+ lookupSelectCount = lookupListCount;
le_int32 count, order = 0;
- le_int32 featureReferences = 0;
- const FeatureTable *featureTable = NULL;
+ le_uint32 featureReferences = 0;
+ LEReferenceTo<FeatureTable> featureTable;
LETag featureTag;
- const FeatureTable *requiredFeatureTable = NULL;
+ LEReferenceTo<FeatureTable> requiredFeatureTable;
LETag requiredFeatureTag = 0x00000000U;
// Count the total number of lookups referenced by all features. This will
// be the maximum number of entries in the lookupOrderArray. We can't use
// lookupListCount because some lookups might be referenced by more than
// one feature.
- for (le_int32 feature = 0; feature < featureCount; feature += 1) {
- le_uint16 featureIndex = SWAPW(langSysTable->featureIndexArray[feature]);
-
- featureTable = featureListTable->getFeatureTable(featureIndex, &featureTag);
+ if(featureListTable.isValid() && LE_SUCCESS(success)) {
+ LEReferenceToArrayOf<le_uint16> featureIndexArray(langSysTable, success, langSysTable->featureIndexArray, featureCount);
+
+ for (le_uint32 feature = 0; LE_SUCCESS(success)&&(feature < featureCount); feature += 1) {
+ le_uint16 featureIndex = SWAPW(featureIndexArray.getObject(feature, success));
+
+ featureTable = featureListTable->getFeatureTable(featureListTable, featureIndex, &featureTag, success);
+ if (!featureTable.isValid() || LE_FAILURE(success)) {
+ continue;
+ }
featureReferences += SWAPW(featureTable->lookupCount);
+ }
+ }
+
+ if (!featureTable.isValid() || LE_FAILURE(success)) {
+ success = LE_INTERNAL_ERROR;
+ return;
}
if (requiredFeatureIndex != 0xFFFF) {
- requiredFeatureTable = featureListTable->getFeatureTable(requiredFeatureIndex, &requiredFeatureTag);
- featureReferences += SWAPW(featureTable->lookupCount);
+ requiredFeatureTable = featureListTable->getFeatureTable(featureListTable, requiredFeatureIndex, &requiredFeatureTag, success);
+ featureReferences += SWAPW(requiredFeatureTable->lookupCount);
}
lookupOrderArray = LE_NEW_ARRAY(le_uint16, featureReferences);
+ if (lookupOrderArray == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ lookupOrderCount = featureReferences;
for (le_int32 f = 0; f < featureMapCount; f += 1) {
FeatureMap fm = featureMap[f];
// If this is the required feature, add its lookups
if (requiredFeatureTag == fm.tag) {
- count += selectLookups(requiredFeatureTable, fm.mask, order);
+ count += selectLookups(requiredFeatureTable, fm.mask, order, success);
}
if (orderFeatures) {
}
for (le_uint16 feature = 0; feature < featureCount; feature += 1) {
- le_uint16 featureIndex = SWAPW(langSysTable->featureIndexArray[feature]);
+ LEReferenceToArrayOf<le_uint16> featureIndexArray(langSysTable, success, langSysTable->featureIndexArray, featureCount);
+ le_uint16 featureIndex = SWAPW(featureIndexArray.getObject(feature,success));
// don't add the required feature to the list more than once...
// TODO: Do we need this check? (Spec. says required feature won't be in feature list...)
continue;
}
- featureTable = featureListTable->getFeatureTable(featureIndex, &featureTag);
+ featureTable = featureListTable->getFeatureTable(featureListTable, featureIndex, &featureTag, success);
if (featureTag == fm.tag) {
- count += selectLookups(featureTable, fm.mask, order + count);
+ count += selectLookups(featureTable, fm.mask, order + count, success);
}
}
}
order += count;
- } else {
- for (le_uint16 feature = 0; feature < featureCount; feature += 1) {
- le_uint16 featureIndex = SWAPW(langSysTable->featureIndexArray[feature]);
+ } else if(langSysTable.isValid()) {
+ LEReferenceToArrayOf<le_uint16> featureIndexArray(langSysTable, success, langSysTable->featureIndexArray, featureCount);
+ for (le_uint16 feature = 0; LE_SUCCESS(success)&& (feature < featureCount); feature += 1) {
+ le_uint16 featureIndex = SWAPW(featureIndexArray.getObject(feature,success));
// don't add the required feature to the list more than once...
// NOTE: This check is commented out because the spec. says that
}
#endif
- featureTable = featureListTable->getFeatureTable(featureIndex, &featureTag);
+ featureTable = featureListTable->getFeatureTable(featureListTable, featureIndex, &featureTag, success);
if (featureTag == fm.tag) {
- order += selectLookups(featureTable, fm.mask, order);
+ order += selectLookups(featureTable, fm.mask, order, success);
}
}
}
LookupProcessor::LookupProcessor()
{
+ lookupOrderArray = NULL;
+ lookupSelectArray = NULL;
}
LookupProcessor::~LookupProcessor()
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