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comparison: gfx/ots/src/vorg.cc
gfx/ots/src/vorg.cc
- changeset 0
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| -1:000000000000 | 0:c48c6e292fab |
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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 "vorg.h" | |
| 6 | |
| 7 #include <vector> | |
| 8 | |
| 9 // VORG - Vertical Origin Table | |
| 10 // http://www.microsoft.com/typography/otspec/vorg.htm | |
| 11 | |
| 12 #define TABLE_NAME "VORG" | |
| 13 | |
| 14 #define DROP_THIS_TABLE \ | |
| 15 do { \ | |
| 16 delete file->vorg; \ | |
| 17 file->vorg = 0; \ | |
| 18 OTS_FAILURE_MSG("Table discarded"); \ | |
| 19 } while (0) | |
| 20 | |
| 21 namespace ots { | |
| 22 | |
| 23 bool ots_vorg_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { | |
| 24 Buffer table(data, length); | |
| 25 file->vorg = new OpenTypeVORG; | |
| 26 OpenTypeVORG * const vorg = file->vorg; | |
| 27 | |
| 28 uint16_t num_recs; | |
| 29 if (!table.ReadU16(&vorg->major_version) || | |
| 30 !table.ReadU16(&vorg->minor_version) || | |
| 31 !table.ReadS16(&vorg->default_vert_origin_y) || | |
| 32 !table.ReadU16(&num_recs)) { | |
| 33 return OTS_FAILURE_MSG("Failed to read header"); | |
| 34 } | |
| 35 if (vorg->major_version != 1) { | |
| 36 OTS_WARNING("bad major version: %u", vorg->major_version); | |
| 37 DROP_THIS_TABLE; | |
| 38 return true; | |
| 39 } | |
| 40 if (vorg->minor_version != 0) { | |
| 41 OTS_WARNING("bad minor version: %u", vorg->minor_version); | |
| 42 DROP_THIS_TABLE; | |
| 43 return true; | |
| 44 } | |
| 45 | |
| 46 // num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf). | |
| 47 if (!num_recs) { | |
| 48 return true; | |
| 49 } | |
| 50 | |
| 51 uint16_t last_glyph_index = 0; | |
| 52 vorg->metrics.reserve(num_recs); | |
| 53 for (unsigned i = 0; i < num_recs; ++i) { | |
| 54 OpenTypeVORGMetrics rec; | |
| 55 | |
| 56 if (!table.ReadU16(&rec.glyph_index) || | |
| 57 !table.ReadS16(&rec.vert_origin_y)) { | |
| 58 return OTS_FAILURE_MSG("Failed to read record %d", i); | |
| 59 } | |
| 60 if ((i != 0) && (rec.glyph_index <= last_glyph_index)) { | |
| 61 OTS_WARNING("the table is not sorted"); | |
| 62 DROP_THIS_TABLE; | |
| 63 return true; | |
| 64 } | |
| 65 last_glyph_index = rec.glyph_index; | |
| 66 | |
| 67 vorg->metrics.push_back(rec); | |
| 68 } | |
| 69 | |
| 70 return true; | |
| 71 } | |
| 72 | |
| 73 bool ots_vorg_should_serialise(OpenTypeFile *file) { | |
| 74 if (!file->cff) return false; // this table is not for fonts with TT glyphs. | |
| 75 return file->vorg != NULL; | |
| 76 } | |
| 77 | |
| 78 bool ots_vorg_serialise(OTSStream *out, OpenTypeFile *file) { | |
| 79 OpenTypeVORG * const vorg = file->vorg; | |
| 80 | |
| 81 if (!out->WriteU16(vorg->major_version) || | |
| 82 !out->WriteU16(vorg->minor_version) || | |
| 83 !out->WriteS16(vorg->default_vert_origin_y) || | |
| 84 !out->WriteU16(vorg->metrics.size())) { | |
| 85 return OTS_FAILURE_MSG("Failed to write table header"); | |
| 86 } | |
| 87 | |
| 88 for (unsigned i = 0; i < vorg->metrics.size(); ++i) { | |
| 89 const OpenTypeVORGMetrics& rec = vorg->metrics[i]; | |
| 90 if (!out->WriteU16(rec.glyph_index) || | |
| 91 !out->WriteS16(rec.vert_origin_y)) { | |
| 92 return OTS_FAILURE_MSG("Failed to write record %d", i); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 return true; | |
| 97 } | |
| 98 | |
| 99 void ots_vorg_free(OpenTypeFile *file) { | |
| 100 delete file->vorg; | |
| 101 } | |
| 102 | |
| 103 } // namespace ots |
