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Issue 658573004: Updating to new OTS repo from https://github.com/khaledhosny/ots.git (Closed) Base URL: https://chromium.googlesource.com/external/ots@master
Patch Set: Adding Colored Emoji changes from external/git repo Created 6 years, 2 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "gasp.h" 5 #include "gasp.h"
6 6
7 // gasp - Grid-fitting And Scan-conversion Procedure 7 // gasp - Grid-fitting And Scan-conversion Procedure
8 // http://www.microsoft.com/opentype/otspec/gasp.htm 8 // http://www.microsoft.com/typography/otspec/gasp.htm
9 9
10 #define DROP_THIS_TABLE \ 10 #define TABLE_NAME "gasp"
11 do { delete file->gasp; file->gasp = 0; } while (0) 11
12 #define DROP_THIS_TABLE(...) \
13 do { \
14 delete file->gasp; \
15 file->gasp = 0; \
16 OTS_FAILURE_MSG_(file, TABLE_NAME ": " __VA_ARGS__); \
17 OTS_FAILURE_MSG("Table discarded"); \
18 } while (0)
12 19
13 namespace ots { 20 namespace ots {
14 21
15 bool ots_gasp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { 22 bool ots_gasp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
16 Buffer table(data, length); 23 Buffer table(data, length);
17 24
18 OpenTypeGASP *gasp = new OpenTypeGASP; 25 OpenTypeGASP *gasp = new OpenTypeGASP;
19 file->gasp = gasp; 26 file->gasp = gasp;
20 27
21 uint16_t num_ranges = 0; 28 uint16_t num_ranges = 0;
22 if (!table.ReadU16(&gasp->version) || 29 if (!table.ReadU16(&gasp->version) ||
23 !table.ReadU16(&num_ranges)) { 30 !table.ReadU16(&num_ranges)) {
24 return OTS_FAILURE(); 31 return OTS_FAILURE_MSG("Failed to read table header");
25 } 32 }
26 33
27 if (gasp->version > 1) { 34 if (gasp->version > 1) {
28 // Lots of Linux fonts have bad version numbers... 35 // Lots of Linux fonts have bad version numbers...
29 OTS_WARNING("bad version: %u", gasp->version); 36 DROP_THIS_TABLE("bad version: %u", gasp->version);
30 DROP_THIS_TABLE;
31 return true; 37 return true;
32 } 38 }
33 39
34 if (num_ranges == 0) { 40 if (num_ranges == 0) {
35 OTS_WARNING("num_ranges is zero"); 41 DROP_THIS_TABLE("num_ranges is zero");
36 DROP_THIS_TABLE;
37 return true; 42 return true;
38 } 43 }
39 44
40 gasp->gasp_ranges.reserve(num_ranges); 45 gasp->gasp_ranges.reserve(num_ranges);
41 for (unsigned i = 0; i < num_ranges; ++i) { 46 for (unsigned i = 0; i < num_ranges; ++i) {
42 uint16_t max_ppem = 0; 47 uint16_t max_ppem = 0;
43 uint16_t behavior = 0; 48 uint16_t behavior = 0;
44 if (!table.ReadU16(&max_ppem) || 49 if (!table.ReadU16(&max_ppem) ||
45 !table.ReadU16(&behavior)) { 50 !table.ReadU16(&behavior)) {
46 return OTS_FAILURE(); 51 return OTS_FAILURE_MSG("Failed to read subrange %d", i);
47 } 52 }
48 if ((i > 0) && (gasp->gasp_ranges[i - 1].first >= max_ppem)) { 53 if ((i > 0) && (gasp->gasp_ranges[i - 1].first >= max_ppem)) {
49 // The records in the gaspRange[] array must be sorted in order of 54 // The records in the gaspRange[] array must be sorted in order of
50 // increasing rangeMaxPPEM value. 55 // increasing rangeMaxPPEM value.
51 OTS_WARNING("ranges are not sorted"); 56 DROP_THIS_TABLE("ranges are not sorted");
52 DROP_THIS_TABLE;
53 return true; 57 return true;
54 } 58 }
55 if ((i == num_ranges - 1u) && // never underflow. 59 if ((i == num_ranges - 1u) && // never underflow.
56 (max_ppem != 0xffffu)) { 60 (max_ppem != 0xffffu)) {
57 OTS_WARNING("The last record should be 0xFFFF as a sentinel value " 61 DROP_THIS_TABLE("The last record should be 0xFFFF as a sentinel value "
58 "for rangeMaxPPEM"); 62 "for rangeMaxPPEM");
59 DROP_THIS_TABLE;
60 return true; 63 return true;
61 } 64 }
62 65
63 if (behavior >> 8) { 66 if (behavior >> 8) {
64 OTS_WARNING("undefined bits are used: %x", behavior); 67 OTS_WARNING("undefined bits are used: %x", behavior);
65 // mask undefined bits. 68 // mask undefined bits.
66 behavior &= 0x000fu; 69 behavior &= 0x000fu;
67 } 70 }
68 71
69 if (gasp->version == 0 && (behavior >> 2) != 0) { 72 if (gasp->version == 0 && (behavior >> 2) != 0) {
(...skipping 11 matching lines...) Expand all
81 return file->gasp != NULL; 84 return file->gasp != NULL;
82 } 85 }
83 86
84 bool ots_gasp_serialise(OTSStream *out, OpenTypeFile *file) { 87 bool ots_gasp_serialise(OTSStream *out, OpenTypeFile *file) {
85 const OpenTypeGASP *gasp = file->gasp; 88 const OpenTypeGASP *gasp = file->gasp;
86 89
87 const uint16_t num_ranges = static_cast<uint16_t>(gasp->gasp_ranges.size()); 90 const uint16_t num_ranges = static_cast<uint16_t>(gasp->gasp_ranges.size());
88 if (num_ranges != gasp->gasp_ranges.size() || 91 if (num_ranges != gasp->gasp_ranges.size() ||
89 !out->WriteU16(gasp->version) || 92 !out->WriteU16(gasp->version) ||
90 !out->WriteU16(num_ranges)) { 93 !out->WriteU16(num_ranges)) {
91 return OTS_FAILURE(); 94 return OTS_FAILURE_MSG("failed to write gasp header");
92 } 95 }
93 96
94 for (uint16_t i = 0; i < num_ranges; ++i) { 97 for (uint16_t i = 0; i < num_ranges; ++i) {
95 if (!out->WriteU16(gasp->gasp_ranges[i].first) || 98 if (!out->WriteU16(gasp->gasp_ranges[i].first) ||
96 !out->WriteU16(gasp->gasp_ranges[i].second)) { 99 !out->WriteU16(gasp->gasp_ranges[i].second)) {
97 return OTS_FAILURE(); 100 return OTS_FAILURE_MSG("Failed to write gasp subtable %d", i);
98 } 101 }
99 } 102 }
100 103
101 return true; 104 return true;
102 } 105 }
103 106
104 void ots_gasp_free(OpenTypeFile *file) { 107 void ots_gasp_free(OpenTypeFile *file) {
105 delete file->gasp; 108 delete file->gasp;
106 } 109 }
107 110
108 } // namespace ots 111 } // namespace ots
112
113 #undef TABLE_NAME
114 #undef DROP_THIS_TABLE
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