gfx/ots/src/maxp.cc@6474c204b198
gfx/ots/src/maxp.cc
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 // 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.
5 #include "maxp.h"
7 // maxp - Maximum Profile
8 // http://www.microsoft.com/typography/otspec/maxp.htm
10 #define TABLE_NAME "maxp"
12 namespace ots {
14 bool ots_maxp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
15 Buffer table(data, length);
17 OpenTypeMAXP *maxp = new OpenTypeMAXP;
18 file->maxp = maxp;
20 uint32_t version = 0;
21 if (!table.ReadU32(&version)) {
22 return OTS_FAILURE_MSG("Failed to read version of maxp table");
23 }
25 if (version >> 16 > 1) {
26 return OTS_FAILURE_MSG("Bad maxp version %d", version);
27 }
29 if (!table.ReadU16(&maxp->num_glyphs)) {
30 return OTS_FAILURE_MSG("Failed to read number of glyphs from maxp table");
31 }
33 if (!maxp->num_glyphs) {
34 return OTS_FAILURE_MSG("Bad number of glyphs 0 in maxp table");
35 }
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 }
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 }
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 }
72 return true;
73 }
75 bool ots_maxp_should_serialise(OpenTypeFile *file) {
76 return file->maxp != NULL;
77 }
79 bool ots_maxp_serialise(OTSStream *out, OpenTypeFile *file) {
80 const OpenTypeMAXP *maxp = file->maxp;
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 }
87 if (!maxp->version_1) return true;
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 }
96 if (g_transcode_hints) {
97 if (!out->WriteU16(maxp->max_zones) ||
98 !out->WriteU16(maxp->max_t_points) ||
99 !out->WriteU16(maxp->max_storage) ||
100 !out->WriteU16(maxp->max_fdefs) ||
101 !out->WriteU16(maxp->max_idefs) ||
102 !out->WriteU16(maxp->max_stack) ||
103 !out->WriteU16(maxp->max_size_glyf_instructions)) {
104 return OTS_FAILURE_MSG("Failed to write more maxp");
105 }
106 } else {
107 if (!out->WriteU16(1) || // max zones
108 !out->WriteU16(0) || // max twilight points
109 !out->WriteU16(0) || // max storage
110 !out->WriteU16(0) || // max function defs
111 !out->WriteU16(0) || // max instruction defs
112 !out->WriteU16(0) || // max stack elements
113 !out->WriteU16(0)) { // max instruction byte count
114 return OTS_FAILURE_MSG("Failed to write more maxp");
115 }
116 }
118 if (!out->WriteU16(maxp->max_c_components) ||
119 !out->WriteU16(maxp->max_c_depth)) {
120 return OTS_FAILURE_MSG("Failed to write yet more maxp");
121 }
123 return true;
124 }
126 void ots_maxp_free(OpenTypeFile *file) {
127 delete file->maxp;
128 }
130 } // namespace ots
