45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
|
/*
|
||
|
|
* @(#)AlternateSubstitutionSubtables.cpp 1.7 00/03/15
|
||
|
|
*
|
||
|
|
* (C) Copyright IBM Corp. 1998, 1999, 2000 - All Rights Reserved
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "LETypes.h"
|
||
|
|
#include "LEGlyphFilter.h"
|
||
|
|
#include "OpenTypeTables.h"
|
||
|
|
#include "GlyphSubstitutionTables.h"
|
||
|
|
#include "AlternateSubstitutionSubtables.h"
|
||
|
|
#include "GlyphIterator.h"
|
||
|
|
#include "LESwaps.h"
|
||
|
|
|
||
|
|
le_uint32 AlternateSubstitutionSubtable::process(GlyphIterator *glyphIterator, LEGlyphFilter *filter)
|
||
|
|
{
|
||
|
|
// NOTE: For now, we'll just pick the first alternative...
|
||
|
|
LEGlyphID glyph = (LEGlyphID) glyphIterator->getCurrGlyphID();
|
||
|
|
le_int32 coverageIndex = getGlyphCoverage(glyph);
|
||
|
|
|
||
|
|
if (coverageIndex >= 0)
|
||
|
|
{
|
||
|
|
le_uint16 altSetCount = SWAPW(alternateSetCount);
|
||
|
|
|
||
|
|
if (coverageIndex < altSetCount)
|
||
|
|
{
|
||
|
|
Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]);
|
||
|
|
AlternateSetTable *alternateSetTable =
|
||
|
|
(AlternateSetTable *) ((char *) this + alternateSetTableOffset);
|
||
|
|
LEGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]);
|
||
|
|
|
||
|
|
if (filter != NULL || filter->accept(alternate)) {
|
||
|
|
glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0]));
|
||
|
|
}
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// XXXX If we get here, the table's mal-formed...
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|