subsetter.h revision 584bf6606b53bda8bf0810e7c0ad57e24cacb4f1 
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#ifndef SFNTLY_CPP_SRC_SFNTLY_TOOLS_SUBSETTER_SUBSETTER_H_
18#define SFNTLY_CPP_SRC_SFNTLY_TOOLS_SUBSETTER_SUBSETTER_H_
19
20#include <vector>
21
22#include "sfntly/font.h"
23#include "sfntly/font_factory.h"
24#include "sfntly/table/core/cmap_table.h"
25#include "sfntly/tools/subsetter/table_subsetter.h"
26
27namespace sfntly {
28
29class Subsetter : public RefCounted<Subsetter> {
30 public:
31  Subsetter(Font* font, FontFactory* font_factory);
32  virtual ~Subsetter();
33
34  virtual void SetGlyphs(IntegerList* glyphs);
35
36  // Set the cmaps to be used in the subsetted font. The cmaps are listed in
37  // order of priority and the number parameter gives a count of how many of the
38  // list should be put into the subsetted font. If there are no matches in the
39  // font for any of the provided cmap ids which would lead to a font with no
40  // cmap then an error will be thrown during subsetting.
41  // The two most common cases would be: <list>
42  // * a list of one or more cmap ids with a count setting of 1
43  //     This will use the list of cmap ids as an ordered priority and look for
44  //     an available cmap in the font that matches the requests. Only the first
45  //     such match will be placed in the subsetted font.
46  // * a list of one or more cmap ids with a count setting equal to the list
47  //   length
48  //     This will use the list of cmap ids and try to place each one specified
49  //     into the subsetted font.
50  // @param cmapIds the cmap ids to use for the subsetted font
51  // @param number the maximum number of cmaps to place in the subsetted font
52  virtual void SetCMaps(CMapIdList* cmap_ids, int32_t number);
53
54  virtual void SetRemoveTables(IntegerSet* remove_tables);
55  virtual CALLER_ATTACH Font::Builder* Subset();
56  virtual IntegerList* GlyphPermutationTable();
57  virtual CMapIdList* CMapId();
58
59 private:
60  FontPtr font_;
61  FontFactoryPtr font_factory_;
62  TableSubsetterList table_subsetters_;
63
64  // Settings from user
65  IntegerSet remove_tables_;
66  IntegerList new_to_old_glyphs_;
67  CMapIdList cmap_ids_;
68};
69
70}  // namespace sfntly
71
72#endif  // SFNTLY_CPP_SRC_SFNTLY_TOOLS_SUBSETTER_SUBSETTER_H_
73