1/*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.  Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26/*
27 *
28 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
29 *
30 */
31
32#include "LETypes.h"
33#include "LEGlyphFilter.h"
34#include "OpenTypeTables.h"
35#include "GlyphSubstitutionTables.h"
36#include "SingleSubstitutionSubtables.h"
37#include "GlyphIterator.h"
38#include "LESwaps.h"
39
40U_NAMESPACE_BEGIN
41
42le_uint32 SingleSubstitutionSubtable::process(const LEReferenceTo<SingleSubstitutionSubtable> &base, GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
43{
44    switch(SWAPW(subtableFormat))
45    {
46    case 0:
47        return 0;
48
49    case 1:
50    {
51      const LEReferenceTo<SingleSubstitutionFormat1Subtable> subtable(base, success, (const SingleSubstitutionFormat1Subtable *) this);
52
53      return subtable->process(subtable, glyphIterator, success, filter);
54    }
55
56    case 2:
57    {
58      const LEReferenceTo<SingleSubstitutionFormat2Subtable> subtable(base, success, (const SingleSubstitutionFormat2Subtable *) this);
59
60      return subtable->process(subtable, glyphIterator, success, filter);
61    }
62
63    default:
64        return 0;
65    }
66}
67
68le_uint32 SingleSubstitutionFormat1Subtable::process(const LEReferenceTo<SingleSubstitutionFormat1Subtable> &base, GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
69{
70    LEGlyphID glyph = glyphIterator->getCurrGlyphID();
71    le_int32 coverageIndex = getGlyphCoverage(base, glyph, success);
72    if (LE_FAILURE(success)) {
73        return 0;
74    }
75
76    if (coverageIndex >= 0) {
77        TTGlyphID substitute = ((TTGlyphID) LE_GET_GLYPH(glyph)) + SWAPW(deltaGlyphID);
78
79        if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute), success)) {
80            glyphIterator->setCurrGlyphID(substitute);
81        }
82
83        return 1;
84    }
85
86    return 0;
87}
88
89le_uint32 SingleSubstitutionFormat2Subtable::process(const LEReferenceTo<SingleSubstitutionFormat2Subtable> &base, GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
90{
91    LEGlyphID glyph = glyphIterator->getCurrGlyphID();
92    le_int32 coverageIndex = getGlyphCoverage(base, glyph, success);
93    if (LE_FAILURE(success)) {
94        return 0;
95    }
96
97    LEReferenceToArrayOf<TTGlyphID> substituteArrayRef(base, success, substituteArray, SWAPW(glyphCount));
98
99    if (coverageIndex >= 0 && LE_SUCCESS(success) && coverageIndex < substituteArrayRef.getCount()) {
100        TTGlyphID substitute = SWAPW(substituteArray[coverageIndex]);
101
102        if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute), success)) {
103            glyphIterator->setCurrGlyphID(substitute);
104        }
105
106        return 1;
107    }
108
109    return 0;
110}
111
112U_NAMESPACE_END
113