75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
/*
|
|
* %W% %E%
|
|
*
|
|
* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
|
|
*
|
|
*/
|
|
|
|
#include "LETypes.h"
|
|
#include "LEGlyphFilter.h"
|
|
#include "OpenTypeTables.h"
|
|
#include "GlyphSubstitutionTables.h"
|
|
#include "LigatureSubstSubtables.h"
|
|
#include "GlyphIterator.h"
|
|
#include "LESwaps.h"
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
le_uint32 LigatureSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
|
|
{
|
|
LEGlyphID glyph = (LEGlyphID) glyphIterator->getCurrGlyphID();
|
|
le_int32 coverageIndex = getGlyphCoverage(glyph);
|
|
|
|
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;
|
|
le_int32 startPosition = glyphIterator->getCurrStreamPosition();
|
|
LEGlyphID ligGlyph = SWAPW(ligTable->ligGlyph);
|
|
le_uint16 comp;
|
|
|
|
if (filter != NULL && ! filter->accept(ligGlyph)) {
|
|
continue;
|
|
}
|
|
|
|
for (comp = 0; comp < compCount; comp += 1) {
|
|
if (! glyphIterator->next()) {
|
|
break;
|
|
}
|
|
|
|
if ((LEGlyphID) glyphIterator->getCurrGlyphID() != SWAPW(ligTable->componentArray[comp])) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (comp == compCount) {
|
|
GlyphIterator tempIterator(*glyphIterator);
|
|
LEGlyphID 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;
|
|
}
|
|
|
|
U_NAMESPACE_END
|