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 "subtly/subsetter.h"
18
19 #include <stdio.h>
20
21 #include "sfntly/font.h"
22 #include "sfntly/font_factory.h"
23 #include "sfntly/tag.h"
24 #include "subtly/character_predicate.h"
25 #include "subtly/font_assembler.h"
26 #include "subtly/font_info.h"
27 #include "subtly/utils.h"
28
29 namespace subtly {
30 using namespace sfntly;
31
32 /******************************************************************************
33 * Subsetter class
34 ******************************************************************************/
Subsetter(Font * font,CharacterPredicate * predicate)35 Subsetter::Subsetter(Font* font, CharacterPredicate* predicate)
36 : font_(font),
37 predicate_(predicate) {
38 }
39
Subsetter(const char * font_path,CharacterPredicate * predicate)40 Subsetter::Subsetter(const char* font_path, CharacterPredicate* predicate)
41 : predicate_(predicate) {
42 font_.Attach(LoadFont(font_path));
43 }
44
Subset()45 CALLER_ATTACH Font* Subsetter::Subset() {
46 Ptr<FontSourcedInfoBuilder> info_builder =
47 new FontSourcedInfoBuilder(font_, 0, predicate_);
48
49 Ptr<FontInfo> font_info;
50 font_info.Attach(info_builder->GetFontInfo());
51 if (!font_info) {
52 #if defined (SUBTLY_DEBUG)
53 fprintf(stderr,
54 "Couldn't create font info. No subset will be generated.\n");
55 #endif
56 return NULL;
57 }
58 IntegerSet* table_blacklist = new IntegerSet;
59 table_blacklist->insert(Tag::DSIG);
60 Ptr<FontAssembler> font_assembler = new FontAssembler(font_info,
61 table_blacklist);
62 Ptr<Font> font_subset;
63 font_subset.Attach(font_assembler->Assemble());
64 delete table_blacklist;
65 return font_subset.Detach();
66 }
67 }
68