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. 1998-2005 - All Rights Reserved
29 *
30 */
31
32#include "LETypes.h"
33#include "LEGlyphFilter.h"
34#include "LEFontInstance.h"
35#include "OpenTypeTables.h"
36#include "ICUFeatures.h"
37#include "Lookups.h"
38#include "ScriptAndLanguage.h"
39#include "GlyphDefinitionTables.h"
40#include "GlyphSubstitutionTables.h"
41#include "SingleSubstitutionSubtables.h"
42#include "MultipleSubstSubtables.h"
43#include "AlternateSubstSubtables.h"
44#include "LigatureSubstSubtables.h"
45#include "ContextualSubstSubtables.h"
46#include "ExtensionSubtables.h"
47#include "LookupProcessor.h"
48#include "GlyphSubstLookupProc.h"
49#include "LESwaps.h"
50
51U_NAMESPACE_BEGIN
52
53GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor(
54        const LEReferenceTo<GlyphSubstitutionTableHeader> &glyphSubstitutionTableHeader,
55        LETag scriptTag,
56        LETag languageTag,
57        const LEGlyphFilter *filter,
58        const FeatureMap *featureMap,
59        le_int32 featureMapCount,
60        le_bool featureOrder,
61        LEErrorCode& success)
62    : LookupProcessor(
63                      glyphSubstitutionTableHeader,
64                      SWAPW(glyphSubstitutionTableHeader->scriptListOffset),
65                      SWAPW(glyphSubstitutionTableHeader->featureListOffset),
66                      SWAPW(glyphSubstitutionTableHeader->lookupListOffset),
67                      scriptTag, languageTag, featureMap, featureMapCount, featureOrder, success), fFilter(filter)
68{
69    // anything?
70}
71
72GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor()
73{
74}
75
76le_uint32 GlyphSubstitutionLookupProcessor::applySubtable(const LEReferenceTo<LookupSubtable> &lookupSubtable, le_uint16 lookupType,
77                                                       GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const
78{
79    if (LE_FAILURE(success)) {
80        return 0;
81    }
82
83    le_uint32 delta = 0;
84
85    switch(lookupType)
86    {
87    case 0:
88        break;
89
90    case gsstSingle:
91    {
92        const LEReferenceTo<SingleSubstitutionSubtable> subtable(lookupSubtable, success);
93
94        delta = subtable->process(subtable, glyphIterator, success, fFilter);
95        break;
96    }
97
98    case gsstMultiple:
99    {
100        const LEReferenceTo<MultipleSubstitutionSubtable> subtable(lookupSubtable, success);
101
102        delta = subtable->process(subtable, glyphIterator, success, fFilter);
103        break;
104    }
105
106    case gsstAlternate:
107    {
108        const LEReferenceTo<AlternateSubstitutionSubtable> subtable(lookupSubtable, success);
109
110        delta = subtable->process(subtable, glyphIterator, success, fFilter);
111        break;
112    }
113
114    case gsstLigature:
115    {
116        const LEReferenceTo<LigatureSubstitutionSubtable> subtable(lookupSubtable, success);
117
118        delta = subtable->process(subtable, glyphIterator, success, fFilter);
119        break;
120    }
121
122    case gsstContext:
123    {
124        const LEReferenceTo<ContextualSubstitutionSubtable> subtable(lookupSubtable, success);
125
126        delta = subtable->process(subtable, this, glyphIterator, fontInstance, success);
127        break;
128    }
129
130    case gsstChainingContext:
131    {
132        const LEReferenceTo<ChainingContextualSubstitutionSubtable> subtable(lookupSubtable, success);
133
134        delta = subtable->process(subtable, this, glyphIterator, fontInstance, success);
135        break;
136    }
137
138    case gsstExtension:
139    {
140        const LEReferenceTo<ExtensionSubtable> subtable(lookupSubtable, success);
141
142        delta = subtable->process(subtable, this, lookupType, glyphIterator, fontInstance, success);
143        break;
144    }
145
146    default:
147        break;
148    }
149
150    return delta;
151}
152
153GlyphSubstitutionLookupProcessor::~GlyphSubstitutionLookupProcessor()
154{
155}
156
157U_NAMESPACE_END
158