void LayoutEngine::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;
}
LEReferenceTo<GlyphDefinitionTableHeader> gdefTable((GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable,
CanonShaping::glyphDefinitionTableLen);
CanonMarkFilter filter(gdefTable, success);
adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
if (fTypoFlags & LE_Kerning_FEATURE_FLAG) { /* kerning enabled */
LETableReference kernTable(fFontInstance, LE_KERN_TABLE_TAG, success);
KernTable kt(kernTable, success);
kt.process(glyphStorage, success);
}
// default is no adjustments
return;
}
void CanonShaping::reorderMarks(const LEUnicode *inChars, le_int32 charCount, le_bool rightToLeft,
LEUnicode *outChars, LEGlyphStorage &glyphStorage)
{
LEErrorCode success = LE_NO_ERROR;
LEReferenceTo<GlyphDefinitionTableHeader> gdefTable(LETableReference::kStaticData, CanonShaping::glyphDefinitionTable, CanonShaping::glyphDefinitionTableLen);
LEReferenceTo<ClassDefinitionTable> classTable = gdefTable->getMarkAttachClassDefinitionTable(gdefTable, success);
le_int32 *combiningClasses = LE_NEW_ARRAY(le_int32, charCount);
le_int32 *indices = LE_NEW_ARRAY(le_int32, charCount);
le_int32 i;
if (combiningClasses == NULL || indices == NULL) {
if (combiningClasses != NULL) {
LE_DELETE_ARRAY(combiningClasses);
}
if (indices != NULL) {
LE_DELETE_ARRAY(indices);
}
return;
}
for (i = 0; i < charCount; i += 1) {
combiningClasses[i] = classTable->getGlyphClass(classTable, (LEGlyphID) inChars[i], success);
indices[i] = i;
}
for (i = 0; i < charCount; i += 1) {
if (combiningClasses[i] != 0) {
le_int32 mark;
for (mark = i; mark < charCount; mark += 1) {
if (combiningClasses[mark] == 0) {
break;
}
}
sortMarks(indices, combiningClasses, i, mark);
}
}
le_int32 out = 0, dir = 1;
if (rightToLeft) {
out = charCount - 1;
dir = -1;
}
for (i = 0; i < charCount; i += 1, out += dir) {
le_int32 index = indices[i];
outChars[i] = inChars[index];
glyphStorage.setCharIndex(out, index, success);
}
LE_DELETE_ARRAY(indices);
LE_DELETE_ARRAY(combiningClasses);
}
void ArabicOpenTypeLayoutEngine::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;
}
if (!fGPOSTable.isEmpty()) {
OpenTypeLayoutEngine::adjustGlyphPositions(chars, offset, count, reverse, glyphStorage, success);
} else if (!fGDEFTable.isEmpty()) {
GDEFMarkFilter filter(fGDEFTable, success);
adjustMarkGlyphs(glyphStorage, &filter, success);
} else {
LEReferenceTo<GlyphDefinitionTableHeader> gdefTable(CanonShaping::glyphDefinitionTable, CanonShaping::glyphDefinitionTableLen);
GDEFMarkFilter filter(gdefTable, success);
adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
}
}
