blob: aaf00760a90c0c01214b1f6cdd917255ab69c8e7 [file] [log] [blame]
Benjamin Lermane8ca9b72015-02-24 16:42:13 +01001// Copyright (c) 2009 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "maxp.h"
6
7// maxp - Maximum Profile
8// http://www.microsoft.com/typography/otspec/maxp.htm
9
10#define TABLE_NAME "maxp"
11
12namespace ots {
13
14bool ots_maxp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
15 Buffer table(data, length);
16
17 OpenTypeMAXP *maxp = new OpenTypeMAXP;
18 file->maxp = maxp;
19
20 uint32_t version = 0;
21 if (!table.ReadU32(&version)) {
22 return OTS_FAILURE_MSG("Failed to read version of maxp table");
23 }
24
25 if (version >> 16 > 1) {
26 return OTS_FAILURE_MSG("Bad maxp version %d", version);
27 }
28
29 if (!table.ReadU16(&maxp->num_glyphs)) {
30 return OTS_FAILURE_MSG("Failed to read number of glyphs from maxp table");
31 }
32
33 if (!maxp->num_glyphs) {
34 return OTS_FAILURE_MSG("Bad number of glyphs 0 in maxp table");
35 }
36
37 if (version >> 16 == 1) {
38 maxp->version_1 = true;
39 if (!table.ReadU16(&maxp->max_points) ||
40 !table.ReadU16(&maxp->max_contours) ||
41 !table.ReadU16(&maxp->max_c_points) ||
42 !table.ReadU16(&maxp->max_c_contours) ||
43 !table.ReadU16(&maxp->max_zones) ||
44 !table.ReadU16(&maxp->max_t_points) ||
45 !table.ReadU16(&maxp->max_storage) ||
46 !table.ReadU16(&maxp->max_fdefs) ||
47 !table.ReadU16(&maxp->max_idefs) ||
48 !table.ReadU16(&maxp->max_stack) ||
49 !table.ReadU16(&maxp->max_size_glyf_instructions) ||
50 !table.ReadU16(&maxp->max_c_components) ||
51 !table.ReadU16(&maxp->max_c_depth)) {
52 return OTS_FAILURE_MSG("Failed to read maxp table");
53 }
54
55 if (maxp->max_zones == 0) {
56 // workaround for ipa*.ttf Japanese fonts.
57 OTS_WARNING("bad max_zones: %u", maxp->max_zones);
58 maxp->max_zones = 1;
59 } else if (maxp->max_zones == 3) {
60 // workaround for Ecolier-*.ttf fonts.
61 OTS_WARNING("bad max_zones: %u", maxp->max_zones);
62 maxp->max_zones = 2;
63 }
64
65 if ((maxp->max_zones != 1) && (maxp->max_zones != 2)) {
66 return OTS_FAILURE_MSG("Bad max zones %d in maxp", maxp->max_zones);
67 }
68 } else {
69 maxp->version_1 = false;
70 }
71
72 return true;
73}
74
75bool ots_maxp_should_serialise(OpenTypeFile *file) {
76 return file->maxp != NULL;
77}
78
79bool ots_maxp_serialise(OTSStream *out, OpenTypeFile *file) {
80 const OpenTypeMAXP *maxp = file->maxp;
81
82 if (!out->WriteU32(maxp->version_1 ? 0x00010000 : 0x00005000) ||
83 !out->WriteU16(maxp->num_glyphs)) {
84 return OTS_FAILURE_MSG("Failed to write maxp version or number of glyphs");
85 }
86
87 if (!maxp->version_1) return true;
88
89 if (!out->WriteU16(maxp->max_points) ||
90 !out->WriteU16(maxp->max_contours) ||
91 !out->WriteU16(maxp->max_c_points) ||
92 !out->WriteU16(maxp->max_c_contours)) {
93 return OTS_FAILURE_MSG("Failed to write maxp");
94 }
95
96 if (!out->WriteU16(maxp->max_zones) ||
97 !out->WriteU16(maxp->max_t_points) ||
98 !out->WriteU16(maxp->max_storage) ||
99 !out->WriteU16(maxp->max_fdefs) ||
100 !out->WriteU16(maxp->max_idefs) ||
101 !out->WriteU16(maxp->max_stack) ||
102 !out->WriteU16(maxp->max_size_glyf_instructions)) {
103 return OTS_FAILURE_MSG("Failed to write more maxp");
104 }
105
106 if (!out->WriteU16(maxp->max_c_components) ||
107 !out->WriteU16(maxp->max_c_depth)) {
108 return OTS_FAILURE_MSG("Failed to write yet more maxp");
109 }
110
111 return true;
112}
113
114void ots_maxp_free(OpenTypeFile *file) {
115 delete file->maxp;
116}
117
118} // namespace ots
119
120#undef TABLE_NAME