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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /gfx/ots/src/vorg.cc | |
parent | Initial commit. (diff) | |
download | firefox-upstream/124.0.1.tar.xz firefox-upstream/124.0.1.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | gfx/ots/src/vorg.cc | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/gfx/ots/src/vorg.cc b/gfx/ots/src/vorg.cc new file mode 100644 index 0000000000..3b4b51c533 --- /dev/null +++ b/gfx/ots/src/vorg.cc @@ -0,0 +1,83 @@ +// Copyright (c) 2009-2017 The OTS 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 + +namespace ots { + +bool OpenTypeVORG::Parse(const uint8_t *data, size_t length) { + Buffer table(data, length); + + uint16_t num_recs; + if (!table.ReadU16(&this->major_version) || + !table.ReadU16(&this->minor_version) || + !table.ReadS16(&this->default_vert_origin_y) || + !table.ReadU16(&num_recs)) { + return Error("Failed to read header"); + } + if (this->major_version != 1) { + return Drop("Unsupported majorVersion: %u", this->major_version); + } + if (this->minor_version != 0) { + return Drop("Unsupported minorVersion: %u", this->minor_version); + } + + // num_recs might be zero (e.g., DFHSMinchoPro5-W3-Demo.otf). + if (!num_recs) { + return true; + } + + uint16_t last_glyph_index = 0; + this->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 Error("Failed to read record %d", i); + } + if ((i != 0) && (rec.glyph_index <= last_glyph_index)) { + return Drop("The table is not sorted"); + } + last_glyph_index = rec.glyph_index; + + this->metrics.push_back(rec); + } + + return true; +} + +bool OpenTypeVORG::Serialize(OTSStream *out) { + const uint16_t num_metrics = static_cast<uint16_t>(this->metrics.size()); + if (num_metrics != this->metrics.size() || + !out->WriteU16(this->major_version) || + !out->WriteU16(this->minor_version) || + !out->WriteS16(this->default_vert_origin_y) || + !out->WriteU16(num_metrics)) { + return Error("Failed to write table header"); + } + + for (uint16_t i = 0; i < num_metrics; ++i) { + const OpenTypeVORGMetrics& rec = this->metrics[i]; + if (!out->WriteU16(rec.glyph_index) || + !out->WriteS16(rec.vert_origin_y)) { + return Error("Failed to write record %d", i); + } + } + + return true; +} + +bool OpenTypeVORG::ShouldSerialize() { + return Table::ShouldSerialize() && + // this table is not for fonts with TT glyphs. + GetFont()->GetTable(OTS_TAG_CFF) != NULL; +} + +} // namespace ots |