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
29namespace subtly {
30using namespace sfntly;
31
32/******************************************************************************
33 * Subsetter class
34 ******************************************************************************/
35Subsetter::Subsetter(Font* font, CharacterPredicate* predicate)
36    : font_(font),
37      predicate_(predicate) {
38}
39
40Subsetter::Subsetter(const char* font_path, CharacterPredicate* predicate)
41    : predicate_(predicate) {
42  font_.Attach(LoadFont(font_path));
43}
44
45CALLER_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