Add m-esr52 at 52.6.0

1 files changed, 60 insertions, 0 deletions

diff --git a/gfx/ots/src/vhea.cc b/gfx/ots/src/vhea.cc
new file mode 100644
index 000000000..e721b971e
--- /dev/null
+++ b/gfx/ots/src/vhea.cc
@@ -0,0 +1,60 @@
+// Copyright (c) 2011 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 "vhea.h"
+
+#include "head.h"
+#include "maxp.h"
+
+// vhea - Vertical Header Table
+// http://www.microsoft.com/typography/otspec/vhea.htm
+
+#define TABLE_NAME "vhea"
+
+namespace ots {
+
+bool ots_vhea_parse(Font *font, const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+  OpenTypeVHEA *vhea = new OpenTypeVHEA;
+  font->vhea = vhea;
+
+  if (!table.ReadU32(&vhea->header.version)) {
+    return OTS_FAILURE_MSG("Failed to read version");
+  }
+  if (vhea->header.version != 0x00010000 &&
+      vhea->header.version != 0x00011000) {
+    return OTS_FAILURE_MSG("Bad vhea version %x", vhea->header.version);
+  }
+
+  if (!ParseMetricsHeader(font, &table, &vhea->header)) {
+    return OTS_FAILURE_MSG("Failed to parse metrics in vhea");
+  }
+
+  return true;
+}
+
+bool ots_vhea_should_serialise(Font *font) {
+  // vhea should'nt serialise when vmtx doesn't exist.
+  return font->vhea != NULL && font->vmtx != NULL;
+}
+
+bool ots_vhea_serialise(OTSStream *out, Font *font) {
+  if (!SerialiseMetricsHeader(font, out, &font->vhea->header)) {
+    return OTS_FAILURE_MSG("Failed to write vhea metrics");
+  }
+  return true;
+}
+
+void ots_vhea_reuse(Font *font, Font *other) {
+  font->vhea = other->vhea;
+  font->vhea_reused = true;
+}
+
+void ots_vhea_free(Font *font) {
+  delete font->vhea;
+}
+
+}  // namespace ots
+
+#undef TABLE_NAME