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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 "cvt.h" | 5 #include "cvt.h" |
6 | 6 |
7 // cvt - Control Value Table | 7 // cvt - Control Value Table |
8 // http://www.microsoft.com/opentype/otspec/cvt.htm | 8 // http://www.microsoft.com/typography/otspec/cvt.htm |
| 9 |
| 10 #define TABLE_NAME "cvt" |
9 | 11 |
10 namespace ots { | 12 namespace ots { |
11 | 13 |
12 bool ots_cvt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { | 14 bool ots_cvt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { |
13 Buffer table(data, length); | 15 Buffer table(data, length); |
14 | 16 |
15 OpenTypeCVT *cvt = new OpenTypeCVT; | 17 OpenTypeCVT *cvt = new OpenTypeCVT; |
16 file->cvt = cvt; | 18 file->cvt = cvt; |
17 | 19 |
18 if (length >= 128 * 1024u) { | 20 if (length >= 128 * 1024u) { |
19 return OTS_FAILURE(); // almost all cvt tables are less than 4k bytes. | 21 return OTS_FAILURE_MSG("Length (%d) > 120K"); // almost all cvt tables are
less than 4k bytes. |
20 } | 22 } |
21 | 23 |
22 if (length % 2 != 0) { | 24 if (length % 2 != 0) { |
23 return OTS_FAILURE(); | 25 return OTS_FAILURE_MSG("Uneven cvt length (%d)", length); |
24 } | 26 } |
25 | 27 |
26 if (!table.Skip(length)) { | 28 if (!table.Skip(length)) { |
27 return OTS_FAILURE(); | 29 return OTS_FAILURE_MSG("Length too high"); |
28 } | 30 } |
29 | 31 |
30 cvt->data = data; | 32 cvt->data = data; |
31 cvt->length = length; | 33 cvt->length = length; |
32 return true; | 34 return true; |
33 } | 35 } |
34 | 36 |
35 bool ots_cvt_should_serialise(OpenTypeFile *file) { | 37 bool ots_cvt_should_serialise(OpenTypeFile *file) { |
36 if (!file->glyf) { | 38 if (!file->glyf) { |
37 return false; // this table is not for CFF fonts. | 39 return false; // this table is not for CFF fonts. |
38 } | 40 } |
39 return g_transcode_hints && file->cvt; | 41 return file->cvt; |
40 } | 42 } |
41 | 43 |
42 bool ots_cvt_serialise(OTSStream *out, OpenTypeFile *file) { | 44 bool ots_cvt_serialise(OTSStream *out, OpenTypeFile *file) { |
43 const OpenTypeCVT *cvt = file->cvt; | 45 const OpenTypeCVT *cvt = file->cvt; |
44 | 46 |
45 if (!out->Write(cvt->data, cvt->length)) { | 47 if (!out->Write(cvt->data, cvt->length)) { |
46 return OTS_FAILURE(); | 48 return OTS_FAILURE_MSG("Failed to write CVT table"); |
47 } | 49 } |
48 | 50 |
49 return true; | 51 return true; |
50 } | 52 } |
51 | 53 |
52 void ots_cvt_free(OpenTypeFile *file) { | 54 void ots_cvt_free(OpenTypeFile *file) { |
53 delete file->cvt; | 55 delete file->cvt; |
54 } | 56 } |
55 | 57 |
56 } // namespace ots | 58 } // namespace ots |
| 59 |
| 60 #undef TABLE_NAME |
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