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_TAG_H_
18#define SFNTLY_CPP_SRC_SFNTLY_TAG_H_
19
20#include <cstddef>
21
22#include "sfntly/port/type.h"
23
24namespace sfntly {
25
26// Font identification tags used for tables, features, etc.
27// Tag names are consistent with the OpenType and sfnt specs.
28struct Tag {
29  static const int32_t ttcf;
30
31  // Table Type Tags
32  // required tables
33  static const int32_t cmap;
34  static const int32_t head;
35  static const int32_t hhea;
36  static const int32_t hmtx;
37  static const int32_t maxp;
38  static const int32_t name;
39  static const int32_t OS_2;
40  static const int32_t post;
41
42  // TrueType outline tables
43  static const int32_t cvt;
44  static const int32_t fpgm;
45  static const int32_t glyf;
46  static const int32_t loca;
47  static const int32_t prep;
48
49  // PostScript outline tables
50  static const int32_t CFF;
51  static const int32_t VORG;
52
53  // opentype bitmap glyph outlines
54  static const int32_t EBDT;
55  static const int32_t EBLC;
56  static const int32_t EBSC;
57
58  // advanced typographic features
59  static const int32_t BASE;
60  static const int32_t GDEF;
61  static const int32_t GPOS;
62  static const int32_t GSUB;
63  static const int32_t JSTF;
64
65  // other
66  static const int32_t DSIG;
67  static const int32_t gasp;
68  static const int32_t hdmx;
69  static const int32_t kern;
70  static const int32_t LTSH;
71  static const int32_t PCLT;
72  static const int32_t VDMX;
73  static const int32_t vhea;
74  static const int32_t vmtx;
75
76  // AAT tables
77  static const int32_t bsln;
78  static const int32_t feat;
79  static const int32_t lcar;
80  static const int32_t morx;
81  static const int32_t opbd;
82  static const int32_t prop;
83
84  // Graphite tables
85  static const int32_t Feat;
86  static const int32_t Glat;
87  static const int32_t Gloc;
88  static const int32_t Sile;
89  static const int32_t Silf;
90
91  // truetype bitmap font tables
92  static const int32_t bhed;
93  static const int32_t bdat;
94  static const int32_t bloc;
95};
96
97// Create integer tag value for human readable tag name.
98inline int32_t GenerateTag(int32_t a, int32_t b, int32_t c, int32_t d) {
99  return (a << 24) | (b << 16) | (c << 8) | d;
100}
101
102// Translate tag to human readable string.
103// The Caller must delete[] the returned value.
104inline char* TagToString(int32_t tag) {
105  char *name = new char[5];
106  name[0] = static_cast<char>((tag & 0xff000000) >> 24);
107  name[1] = static_cast<char>((tag & 0x00ff0000) >> 16);
108  name[2] = static_cast<char>((tag & 0x0000ff00) >> 8);
109  name[3] = static_cast<char>(tag & 0x000000ff);
110  name[4] = 0;
111  return name;
112}
113
114// Note: For Java, these two orderings are in Font class.  Moved here to avoid
115//       VC++ bug of not populating correct values.
116extern const int32_t CFF_TABLE_ORDERING[];
117extern const size_t CFF_TABLE_ORDERING_SIZE;
118extern const int32_t TRUE_TYPE_TABLE_ORDERING[];
119extern const size_t TRUE_TYPE_TABLE_ORDERING_SIZE;
120
121}  // namespace sfntly
122
123#endif  // SFNTLY_CPP_SRC_SFNTLY_TAG_H_
124