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/*
* %W% %E%
*
* (C) Copyright IBM Corp. 2008-2013 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "OpenTypeTables.h"
#include "GlyphSubstitutionTables.h"
#include "LookupProcessor.h"
#include "ExtensionSubtables.h"
#include "GlyphIterator.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
// read a 32-bit value that might only be 16-bit-aligned in memory
static inline le_uint32 READ_LONG(le_uint32 code) {
le_uint16* first = ((le_uint16*)&code);
le_uint16* second = (((le_uint16*)&code) + 1);
return (le_uint32)((SWAPW(*first) << 16) + SWAPW(*second));
}
// FIXME: should look at the format too... maybe have a sub-class for it?
le_uint32 ExtensionSubtable::process(const LookupProcessor *lookupProcessor, le_uint16 lookupType,
GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const
{
const LEReferenceTo<ExtensionSubtable> thisRef(lookupProcessor->getReference(), success); // create a reference to this
if (LE_FAILURE(success)) {
return 0;
}
le_uint16 elt = SWAPW(extensionLookupType);
if (elt != lookupType) {
le_uint32 extOffset = READ_LONG(extensionOffset);
LEReferenceTo<LookupSubtable> subtable(thisRef, success, extOffset);
if(LE_SUCCESS(success)) {
return lookupProcessor->applySubtable(subtable, elt, glyphIterator, fontInstance, success);
}
}
return 0;
}
U_NAMESPACE_END
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