| // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "vorg.h" |
| |
| #include <vector> |
| |
| // VORG - Vertical Origin Table |
| // http://www.microsoft.com/typography/otspec/vorg.htm |
| |
| #define TABLE_NAME "VORG" |
| |
| #define DROP_THIS_TABLE(...) \ |
| do { \ |
| OTS_FAILURE_MSG_(file, TABLE_NAME ": " __VA_ARGS__); \ |
| OTS_FAILURE_MSG("Table discarded"); \ |
| delete file->vorg; \ |
| file->vorg = 0; \ |
| } while (0) |
| |
| namespace ots { |
| |
| bool ots_vorg_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { |
| Buffer table(data, length); |
| file->vorg = new OpenTypeVORG; |
| OpenTypeVORG * const vorg = file->vorg; |
| |
| uint16_t num_recs; |
| if (!table.ReadU16(&vorg->major_version) || |
| !table.ReadU16(&vorg->minor_version) || |
| !table.ReadS16(&vorg->default_vert_origin_y) || |
| !table.ReadU16(&num_recs)) { |
| return OTS_FAILURE_MSG("Failed to read header"); |
| } |
| if (vorg->major_version != 1) { |
| DROP_THIS_TABLE("bad major version: %u", vorg->major_version); |
| return true; |
| } |
| if (vorg->minor_version != 0) { |
| DROP_THIS_TABLE("bad minor version: %u", vorg->minor_version); |
| return true; |
| } |
| |
| // num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf). |
| if (!num_recs) { |
| return true; |
| } |
| |
| uint16_t last_glyph_index = 0; |
| vorg->metrics.reserve(num_recs); |
| for (unsigned i = 0; i < num_recs; ++i) { |
| OpenTypeVORGMetrics rec; |
| |
| if (!table.ReadU16(&rec.glyph_index) || |
| !table.ReadS16(&rec.vert_origin_y)) { |
| return OTS_FAILURE_MSG("Failed to read record %d", i); |
| } |
| if ((i != 0) && (rec.glyph_index <= last_glyph_index)) { |
| DROP_THIS_TABLE("the table is not sorted"); |
| return true; |
| } |
| last_glyph_index = rec.glyph_index; |
| |
| vorg->metrics.push_back(rec); |
| } |
| |
| return true; |
| } |
| |
| bool ots_vorg_should_serialise(OpenTypeFile *file) { |
| if (!file->cff) return false; // this table is not for fonts with TT glyphs. |
| return file->vorg != NULL; |
| } |
| |
| bool ots_vorg_serialise(OTSStream *out, OpenTypeFile *file) { |
| OpenTypeVORG * const vorg = file->vorg; |
| |
| const uint16_t num_metrics = static_cast<uint16_t>(vorg->metrics.size()); |
| if (num_metrics != vorg->metrics.size() || |
| !out->WriteU16(vorg->major_version) || |
| !out->WriteU16(vorg->minor_version) || |
| !out->WriteS16(vorg->default_vert_origin_y) || |
| !out->WriteU16(num_metrics)) { |
| return OTS_FAILURE_MSG("Failed to write table header"); |
| } |
| |
| for (uint16_t i = 0; i < num_metrics; ++i) { |
| const OpenTypeVORGMetrics& rec = vorg->metrics[i]; |
| if (!out->WriteU16(rec.glyph_index) || |
| !out->WriteS16(rec.vert_origin_y)) { |
| return OTS_FAILURE_MSG("Failed to write record %d", i); |
| } |
| } |
| |
| return true; |
| } |
| |
| void ots_vorg_free(OpenTypeFile *file) { |
| delete file->vorg; |
| } |
| |
| } // namespace ots |
| |
| #undef TABLE_NAME |
| #undef DROP_THIS_TABLE |