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/tools/subsetter/subsetter.h"
18
19 #include <algorithm>
20 #include <iterator>
21
22 #include "sfntly/tools/subsetter/glyph_table_subsetter.h"
23
24 namespace sfntly {
25
Subsetter(Font * font,FontFactory * font_factory)26 Subsetter::Subsetter(Font* font, FontFactory* font_factory) {
27 font_ = font;
28 font_factory_ = font_factory;
29 TableSubsetterPtr subsetter = new GlyphTableSubsetter();
30 // TODO(arthurhsu): IMPLEMENT: CMap table subsetter
31 table_subsetters_.push_back(subsetter);
32 }
33
~Subsetter()34 Subsetter::~Subsetter() {
35 font_factory_.Release();
36 font_.Release();
37 table_subsetters_.clear();
38 }
39
SetGlyphs(IntegerList * glyphs)40 void Subsetter::SetGlyphs(IntegerList* glyphs) {
41 new_to_old_glyphs_ = *glyphs;
42 }
43
SetCMaps(CMapIdList * cmap_ids,int32_t number)44 void Subsetter::SetCMaps(CMapIdList* cmap_ids, int32_t number) {
45 UNREFERENCED_PARAMETER(cmap_ids);
46 UNREFERENCED_PARAMETER(number);
47 // TODO(arthurhsu): IMPLEMENT
48 }
49
SetRemoveTables(IntegerSet * remove_tables)50 void Subsetter::SetRemoveTables(IntegerSet* remove_tables) {
51 remove_tables_ = *remove_tables;
52 }
53
Subset()54 CALLER_ATTACH Font::Builder* Subsetter::Subset() {
55 FontBuilderPtr font_builder;
56 font_builder.Attach(font_factory_->NewFontBuilder());
57
58 IntegerSet table_tags;
59 for (TableMap::const_iterator i = font_->GetTableMap()->begin(),
60 e = font_->GetTableMap()->end(); i != e; ++i) {
61 table_tags.insert(i->first);
62 }
63 if (!remove_tables_.empty()) {
64 IntegerSet result;
65 std::set_difference(table_tags.begin(), table_tags.end(),
66 remove_tables_.begin(), remove_tables_.end(),
67 std::inserter(result, result.end()));
68 table_tags = result;
69 }
70 for (TableSubsetterList::iterator
71 table_subsetter = table_subsetters_.begin(),
72 table_subsetter_end = table_subsetters_.end();
73 table_subsetter != table_subsetter_end; ++table_subsetter) {
74 bool handled = (*table_subsetter)->Subset(this, font_, font_builder);
75 if (handled) {
76 IntegerSet* handled_tags = (*table_subsetter)->TagsHandled();
77 IntegerSet result;
78 std::set_difference(table_tags.begin(), table_tags.end(),
79 handled_tags->begin(), handled_tags->end(),
80 std::inserter(result, result.end()));
81 table_tags = result;
82 }
83 }
84 for (IntegerSet::iterator tag = table_tags.begin(),
85 tag_end = table_tags.end(); tag != tag_end; ++tag) {
86 Table* table = font_->GetTable(*tag);
87 if (table) {
88 font_builder->NewTableBuilder(*tag, table->ReadFontData());
89 }
90 }
91 return font_builder.Detach();
92 }
93
GlyphPermutationTable()94 IntegerList* Subsetter::GlyphPermutationTable() {
95 return &new_to_old_glyphs_;
96 }
97
CMapId()98 CMapIdList* Subsetter::CMapId() {
99 return &cmap_ids_;
100 }
101
102 } // namespace sfntly
103