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-rw-r--r--gfx/ots/src/cvt.cc46
1 files changed, 46 insertions, 0 deletions
diff --git a/gfx/ots/src/cvt.cc b/gfx/ots/src/cvt.cc
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+// 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 "cvt.h"
+
+// cvt - Control Value Table
+// http://www.microsoft.com/typography/otspec/cvt.htm
+
+namespace ots {
+
+bool OpenTypeCVT::Parse(const uint8_t *data, size_t length) {
+ Buffer table(data, length);
+
+ if (length >= 128 * 1024u) {
+ return Error("Length (%d) > 120K"); // almost all cvt tables are less than 4k bytes.
+ }
+
+ if (length % 2 != 0) {
+ return Error("Uneven table length (%d)", length);
+ }
+
+ if (!table.Skip(length)) {
+ return Error("Table length too high");
+ }
+
+ this->data = data;
+ this->length = length;
+ return true;
+}
+
+bool OpenTypeCVT::Serialize(OTSStream *out) {
+ if (!out->Write(this->data, this->length)) {
+ return Error("Failed to write cvt table");
+ }
+
+ return true;
+}
+
+bool OpenTypeCVT::ShouldSerialize() {
+ return Table::ShouldSerialize() &&
+ // this table is not for CFF fonts.
+ GetFont()->GetTable(OTS_TAG_GLYF) != NULL;
+}
+
+} // namespace ots