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comparison: gfx/ots/src/cvt.cc
gfx/ots/src/cvt.cc
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:68f56c2d82c7 |
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| 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. | |
| 4 | |
| 5 #include "cvt.h" | |
| 6 | |
| 7 // cvt - Control Value Table | |
| 8 // http://www.microsoft.com/typography/otspec/cvt.htm | |
| 9 | |
| 10 #define TABLE_NAME "cvt" | |
| 11 | |
| 12 namespace ots { | |
| 13 | |
| 14 bool ots_cvt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { | |
| 15 Buffer table(data, length); | |
| 16 | |
| 17 OpenTypeCVT *cvt = new OpenTypeCVT; | |
| 18 file->cvt = cvt; | |
| 19 | |
| 20 if (length >= 128 * 1024u) { | |
| 21 return OTS_FAILURE_MSG("Length (%d) > 120K"); // almost all cvt tables are less than 4k bytes. | |
| 22 } | |
| 23 | |
| 24 if (length % 2 != 0) { | |
| 25 return OTS_FAILURE_MSG("Uneven cvt length (%d)", length); | |
| 26 } | |
| 27 | |
| 28 if (!table.Skip(length)) { | |
| 29 return OTS_FAILURE_MSG("Length too high"); | |
| 30 } | |
| 31 | |
| 32 cvt->data = data; | |
| 33 cvt->length = length; | |
| 34 return true; | |
| 35 } | |
| 36 | |
| 37 bool ots_cvt_should_serialise(OpenTypeFile *file) { | |
| 38 if (!file->glyf) { | |
| 39 return false; // this table is not for CFF fonts. | |
| 40 } | |
| 41 return g_transcode_hints && file->cvt; | |
| 42 } | |
| 43 | |
| 44 bool ots_cvt_serialise(OTSStream *out, OpenTypeFile *file) { | |
| 45 const OpenTypeCVT *cvt = file->cvt; | |
| 46 | |
| 47 if (!out->Write(cvt->data, cvt->length)) { | |
| 48 return OTS_FAILURE_MSG("Failed to write CVT table"); | |
| 49 } | |
| 50 | |
| 51 return true; | |
| 52 } | |
| 53 | |
| 54 void ots_cvt_free(OpenTypeFile *file) { | |
| 55 delete file->cvt; | |
| 56 } | |
| 57 | |
| 58 } // namespace ots |
