1 /*
2 * Copyright 2011 Google Inc. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "sfntly/font_factory.h"
18
19 #include <string.h>
20
21 #include "sfntly/tag.h"
22
23 namespace sfntly {
24
~FontFactory()25 FontFactory::~FontFactory() {
26 }
27
GetInstance()28 CALLER_ATTACH FontFactory* FontFactory::GetInstance() {
29 FontFactoryPtr instance = new FontFactory();
30 return instance.Detach();
31 }
32
FingerprintFont(bool fingerprint)33 void FontFactory::FingerprintFont(bool fingerprint) {
34 fingerprint_ = fingerprint;
35 }
36
FingerprintFont()37 bool FontFactory::FingerprintFont() {
38 return fingerprint_;
39 }
40
LoadFonts(InputStream * is,FontArray * output)41 void FontFactory::LoadFonts(InputStream* is, FontArray* output) {
42 assert(output);
43 PushbackInputStream* pbis = down_cast<PushbackInputStream*>(is);
44 if (IsCollection(pbis)) {
45 LoadCollection(pbis, output);
46 return;
47 }
48 FontPtr font;
49 font.Attach(LoadSingleOTF(pbis));
50 if (font) {
51 output->push_back(font);
52 }
53 }
54
LoadFonts(ByteVector * b,FontArray * output)55 void FontFactory::LoadFonts(ByteVector* b, FontArray* output) {
56 WritableFontDataPtr wfd;
57 wfd.Attach(WritableFontData::CreateWritableFontData(b));
58 if (IsCollection(wfd)) {
59 LoadCollection(wfd, output);
60 return;
61 }
62 FontPtr font;
63 font.Attach(LoadSingleOTF(wfd));
64 if (font) {
65 output->push_back(font);
66 }
67 }
68
LoadFontsForBuilding(InputStream * is,FontBuilderArray * output)69 void FontFactory::LoadFontsForBuilding(InputStream* is,
70 FontBuilderArray* output) {
71 PushbackInputStream* pbis = down_cast<PushbackInputStream*>(is);
72 if (IsCollection(pbis)) {
73 LoadCollectionForBuilding(pbis, output);
74 return;
75 }
76 FontBuilderPtr builder;
77 builder.Attach(LoadSingleOTFForBuilding(pbis));
78 if (builder) {
79 output->push_back(builder);
80 }
81 }
82
LoadFontsForBuilding(ByteVector * b,FontBuilderArray * output)83 void FontFactory::LoadFontsForBuilding(ByteVector* b,
84 FontBuilderArray* output) {
85 WritableFontDataPtr wfd;
86 wfd.Attach(WritableFontData::CreateWritableFontData(b));
87 if (IsCollection(wfd)) {
88 LoadCollectionForBuilding(wfd, output);
89 return;
90 }
91 FontBuilderPtr builder;
92 builder.Attach(LoadSingleOTFForBuilding(wfd, 0));
93 if (builder) {
94 output->push_back(builder);
95 }
96 }
97
SerializeFont(Font * font,OutputStream * os)98 void FontFactory::SerializeFont(Font* font, OutputStream* os) {
99 font->Serialize(os, &table_ordering_);
100 }
101
SetSerializationTableOrdering(const IntegerList & table_ordering)102 void FontFactory::SetSerializationTableOrdering(
103 const IntegerList& table_ordering) {
104 table_ordering_ = table_ordering;
105 }
106
NewFontBuilder()107 CALLER_ATTACH Font::Builder* FontFactory::NewFontBuilder() {
108 return Font::Builder::GetOTFBuilder(this);
109 }
110
LoadSingleOTF(InputStream * is)111 CALLER_ATTACH Font* FontFactory::LoadSingleOTF(InputStream* is) {
112 FontBuilderPtr builder;
113 builder.Attach(LoadSingleOTFForBuilding(is));
114 return builder->Build();
115 }
116
LoadSingleOTF(WritableFontData * wfd)117 CALLER_ATTACH Font* FontFactory::LoadSingleOTF(WritableFontData* wfd) {
118 FontBuilderPtr builder;
119 builder.Attach(LoadSingleOTFForBuilding(wfd, 0));
120 return builder->Build();
121 }
122
LoadCollection(InputStream * is,FontArray * output)123 void FontFactory::LoadCollection(InputStream* is, FontArray* output) {
124 FontBuilderArray ba;
125 LoadCollectionForBuilding(is, &ba);
126 output->reserve(ba.size());
127 for (FontBuilderArray::iterator builder = ba.begin(), builders_end = ba.end();
128 builder != builders_end; ++builder) {
129 FontPtr font;
130 font.Attach((*builder)->Build());
131 output->push_back(font);
132 }
133 }
134
LoadCollection(WritableFontData * wfd,FontArray * output)135 void FontFactory::LoadCollection(WritableFontData* wfd, FontArray* output) {
136 FontBuilderArray builders;
137 LoadCollectionForBuilding(wfd, &builders);
138 output->reserve(builders.size());
139 for (FontBuilderArray::iterator builder = builders.begin(),
140 builders_end = builders.end();
141 builder != builders_end; ++builder) {
142 FontPtr font;
143 font.Attach((*builder)->Build());
144 output->push_back(font);
145 }
146 }
147
148 CALLER_ATTACH
LoadSingleOTFForBuilding(InputStream * is)149 Font::Builder* FontFactory::LoadSingleOTFForBuilding(InputStream* is) {
150 // UNIMPLEMENTED: SHA-1 hash checking via Java DigestStream
151 Font::Builder* builder = Font::Builder::GetOTFBuilder(this, is);
152 // UNIMPLEMENTED: setDigest
153 return builder;
154 }
155
156 CALLER_ATTACH Font::Builder*
LoadSingleOTFForBuilding(WritableFontData * wfd,int32_t offset_to_offset_table)157 FontFactory::LoadSingleOTFForBuilding(WritableFontData* wfd,
158 int32_t offset_to_offset_table) {
159 // UNIMPLEMENTED: SHA-1 hash checking via Java DigestStream
160 Font::Builder* builder =
161 Font::Builder::GetOTFBuilder(this, wfd, offset_to_offset_table);
162 // UNIMPLEMENTED: setDigest
163 return builder;
164 }
165
LoadCollectionForBuilding(InputStream * is,FontBuilderArray * builders)166 void FontFactory::LoadCollectionForBuilding(InputStream* is,
167 FontBuilderArray* builders) {
168 assert(is);
169 assert(builders);
170 WritableFontDataPtr wfd;
171 wfd.Attach(WritableFontData::CreateWritableFontData(is->Available()));
172 wfd->CopyFrom(is);
173 LoadCollectionForBuilding(wfd, builders);
174 }
175
LoadCollectionForBuilding(WritableFontData * wfd,FontBuilderArray * builders)176 void FontFactory::LoadCollectionForBuilding(WritableFontData* wfd,
177 FontBuilderArray* builders) {
178 int32_t ttc_tag = wfd->ReadULongAsInt(Offset::kTTCTag);
179 UNREFERENCED_PARAMETER(ttc_tag);
180 int32_t version = wfd->ReadFixed(Offset::kVersion);
181 UNREFERENCED_PARAMETER(version);
182 int32_t num_fonts = wfd->ReadULongAsInt(Offset::kNumFonts);
183
184 builders->reserve(num_fonts);
185 int32_t offset_table_offset = Offset::kOffsetTable;
186 for (int32_t font_number = 0;
187 font_number < num_fonts;
188 font_number++, offset_table_offset += DataSize::kULONG) {
189 int32_t offset = wfd->ReadULongAsInt(offset_table_offset);
190 FontBuilderPtr builder;
191 builder.Attach(LoadSingleOTFForBuilding(wfd, offset));
192 builders->push_back(builder);
193 }
194 }
195
IsCollection(PushbackInputStream * pbis)196 bool FontFactory::IsCollection(PushbackInputStream* pbis) {
197 ByteVector tag(4);
198 pbis->Read(&tag);
199 pbis->Unread(&tag);
200 return Tag::ttcf == GenerateTag(tag[0], tag[1], tag[2], tag[3]);
201 }
202
IsCollection(ReadableFontData * rfd)203 bool FontFactory::IsCollection(ReadableFontData* rfd) {
204 ByteVector tag(4);
205 rfd->ReadBytes(0, &(tag[0]), 0, tag.size());
206 return Tag::ttcf ==
207 GenerateTag(tag[0], tag[1], tag[2], tag[3]);
208 }
209
FontFactory()210 FontFactory::FontFactory()
211 : fingerprint_(false) {
212 }
213
214 } // namespace sfntly
215