1/*
2 *
3 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
4 *
5 */
6
7#include "LETypes.h"
8#include "LEGlyphFilter.h"
9#include "OpenTypeTables.h"
10#include "GlyphSubstitutionTables.h"
11#include "SingleSubstitutionSubtables.h"
12#include "GlyphIterator.h"
13#include "LESwaps.h"
14
15U_NAMESPACE_BEGIN
16
17le_uint32 SingleSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
18{
19    switch(SWAPW(subtableFormat))
20    {
21    case 0:
22        return 0;
23
24    case 1:
25    {
26        const SingleSubstitutionFormat1Subtable *subtable = (const SingleSubstitutionFormat1Subtable *) this;
27
28        return subtable->process(glyphIterator, filter);
29    }
30
31    case 2:
32    {
33        const SingleSubstitutionFormat2Subtable *subtable = (const SingleSubstitutionFormat2Subtable *) this;
34
35        return subtable->process(glyphIterator, filter);
36    }
37
38    default:
39        return 0;
40    }
41}
42
43le_uint32 SingleSubstitutionFormat1Subtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
44{
45    LEGlyphID glyph = glyphIterator->getCurrGlyphID();
46    le_int32 coverageIndex = getGlyphCoverage(glyph);
47
48    if (coverageIndex >= 0) {
49        TTGlyphID substitute = ((TTGlyphID) LE_GET_GLYPH(glyph)) + SWAPW(deltaGlyphID);
50
51        if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute))) {
52            glyphIterator->setCurrGlyphID(substitute);
53        }
54
55        return 1;
56    }
57
58    return 0;
59}
60
61le_uint32 SingleSubstitutionFormat2Subtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
62{
63    LEGlyphID glyph = glyphIterator->getCurrGlyphID();
64    le_int32 coverageIndex = getGlyphCoverage(glyph);
65
66    if (coverageIndex >= 0) {
67        TTGlyphID substitute = SWAPW(substituteArray[coverageIndex]);
68
69        if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute))) {
70            glyphIterator->setCurrGlyphID(substitute);
71        }
72
73        return 1;
74    }
75
76    return 0;
77}
78
79U_NAMESPACE_END
80