yusukes@chromium.org | d257d18 | 2009-11-04 04:56:32 +0000 | [diff] [blame] | 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 "vorg.h" |
| 6 | |
| 7 | #include <vector> |
| 8 | |
| 9 | // VORG - Vertical Origin Table |
| 10 | // http://www.microsoft.com/opentype/otspec/vorg.htm |
| 11 | |
| 12 | #define DROP_THIS_TABLE \ |
| 13 | do { delete file->vorg; file->vorg = 0; } while (0) |
| 14 | |
| 15 | namespace ots { |
| 16 | |
| 17 | bool ots_vorg_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { |
| 18 | Buffer table(data, length); |
| 19 | file->vorg = new OpenTypeVORG; |
| 20 | OpenTypeVORG * const vorg = file->vorg; |
| 21 | |
| 22 | uint16_t num_recs; |
| 23 | if (!table.ReadU16(&vorg->major_version) || |
| 24 | !table.ReadU16(&vorg->minor_version) || |
| 25 | !table.ReadS16(&vorg->default_vert_origin_y) || |
| 26 | !table.ReadU16(&num_recs)) { |
| 27 | return OTS_FAILURE(); |
| 28 | } |
| 29 | if (vorg->major_version != 1) { |
| 30 | OTS_WARNING("bad major version: %u", vorg->major_version); |
| 31 | DROP_THIS_TABLE; |
| 32 | return true; |
| 33 | } |
| 34 | if (vorg->minor_version != 0) { |
| 35 | OTS_WARNING("bad minor version: %u", vorg->minor_version); |
| 36 | DROP_THIS_TABLE; |
| 37 | return true; |
| 38 | } |
| 39 | |
| 40 | // num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf). |
| 41 | if (!num_recs) { |
| 42 | return true; |
| 43 | } |
| 44 | |
| 45 | uint16_t last_glyph_index = 0; |
| 46 | vorg->metrics.reserve(num_recs); |
| 47 | for (unsigned i = 0; i < num_recs; ++i) { |
| 48 | OpenTypeVORGMetrics rec; |
| 49 | |
| 50 | if (!table.ReadU16(&rec.glyph_index) || |
| 51 | !table.ReadS16(&rec.vert_origin_y)) { |
| 52 | return OTS_FAILURE(); |
| 53 | } |
| 54 | if ((i != 0) && (rec.glyph_index <= last_glyph_index)) { |
| 55 | OTS_WARNING("the table is not sorted"); |
| 56 | DROP_THIS_TABLE; |
| 57 | return true; |
| 58 | } |
| 59 | last_glyph_index = rec.glyph_index; |
| 60 | |
| 61 | vorg->metrics.push_back(rec); |
| 62 | } |
| 63 | |
| 64 | return true; |
| 65 | } |
| 66 | |
| 67 | bool ots_vorg_should_serialise(OpenTypeFile *file) { |
| 68 | if (!file->cff) return false; // this table is not for fonts with TT glyphs. |
agl@chromium.org | 2beaf1d | 2011-01-21 17:19:34 +0000 | [diff] [blame] | 69 | return file->vorg != NULL; |
yusukes@chromium.org | d257d18 | 2009-11-04 04:56:32 +0000 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | bool ots_vorg_serialise(OTSStream *out, OpenTypeFile *file) { |
| 73 | OpenTypeVORG * const vorg = file->vorg; |
| 74 | |
| 75 | if (!out->WriteU16(vorg->major_version) || |
| 76 | !out->WriteU16(vorg->minor_version) || |
| 77 | !out->WriteS16(vorg->default_vert_origin_y) || |
| 78 | !out->WriteU16(vorg->metrics.size())) { |
| 79 | return OTS_FAILURE(); |
| 80 | } |
| 81 | |
| 82 | for (unsigned i = 0; i < vorg->metrics.size(); ++i) { |
| 83 | const OpenTypeVORGMetrics& rec = vorg->metrics[i]; |
| 84 | if (!out->WriteU16(rec.glyph_index) || |
| 85 | !out->WriteS16(rec.vert_origin_y)) { |
| 86 | return OTS_FAILURE(); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | return true; |
| 91 | } |
| 92 | |
| 93 | void ots_vorg_free(OpenTypeFile *file) { |
| 94 | delete file->vorg; |
| 95 | } |
| 96 | |
| 97 | } // namespace ots |