|
sl@0
|
1 |
/*
|
|
sl@0
|
2 |
*
|
|
sl@0
|
3 |
* (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
|
|
sl@0
|
4 |
*
|
|
sl@0
|
5 |
*/
|
|
sl@0
|
6 |
|
|
sl@0
|
7 |
#include "LETypes.h"
|
|
sl@0
|
8 |
#include "LEGlyphFilter.h"
|
|
sl@0
|
9 |
#include "OpenTypeTables.h"
|
|
sl@0
|
10 |
#include "GlyphSubstitutionTables.h"
|
|
sl@0
|
11 |
#include "AlternateSubstSubtables.h"
|
|
sl@0
|
12 |
#include "GlyphIterator.h"
|
|
sl@0
|
13 |
#include "LESwaps.h"
|
|
sl@0
|
14 |
|
|
sl@0
|
15 |
U_NAMESPACE_BEGIN
|
|
sl@0
|
16 |
|
|
sl@0
|
17 |
le_uint32 AlternateSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
|
|
sl@0
|
18 |
{
|
|
sl@0
|
19 |
// NOTE: For now, we'll just pick the first alternative...
|
|
sl@0
|
20 |
LEGlyphID glyph = glyphIterator->getCurrGlyphID();
|
|
sl@0
|
21 |
le_int32 coverageIndex = getGlyphCoverage(glyph);
|
|
sl@0
|
22 |
|
|
sl@0
|
23 |
if (coverageIndex >= 0) {
|
|
sl@0
|
24 |
le_uint16 altSetCount = SWAPW(alternateSetCount);
|
|
sl@0
|
25 |
|
|
sl@0
|
26 |
if (coverageIndex < altSetCount) {
|
|
sl@0
|
27 |
Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]);
|
|
sl@0
|
28 |
const AlternateSetTable *alternateSetTable =
|
|
sl@0
|
29 |
(const AlternateSetTable *) ((char *) this + alternateSetTableOffset);
|
|
sl@0
|
30 |
TTGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]);
|
|
sl@0
|
31 |
|
|
sl@0
|
32 |
if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, alternate))) {
|
|
sl@0
|
33 |
glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0]));
|
|
sl@0
|
34 |
}
|
|
sl@0
|
35 |
|
|
sl@0
|
36 |
return 1;
|
|
sl@0
|
37 |
}
|
|
sl@0
|
38 |
|
|
sl@0
|
39 |
// XXXX If we get here, the table's mal-formed...
|
|
sl@0
|
40 |
}
|
|
sl@0
|
41 |
|
|
sl@0
|
42 |
return 0;
|
|
sl@0
|
43 |
}
|
|
sl@0
|
44 |
|
|
sl@0
|
45 |
U_NAMESPACE_END
|