Add m-esr52 at 52.6.0

1 files changed, 57 insertions, 0 deletions

diff --git a/gfx/ots/src/vmtx.cc b/gfx/ots/src/vmtx.cc
new file mode 100644
index 000000000..64a706148
--- /dev/null
+++ b/gfx/ots/src/vmtx.cc
@@ -0,0 +1,57 @@
+// 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 "vmtx.h"
+
+#include "maxp.h"
+#include "vhea.h"
+
+// vmtx - Vertical Metrics Table
+// http://www.microsoft.com/typography/otspec/vmtx.htm
+
+#define TABLE_NAME "vmtx"
+
+namespace ots {
+
+bool ots_vmtx_parse(Font *font, const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+  OpenTypeVMTX *vmtx = new OpenTypeVMTX;
+  font->vmtx = vmtx;
+
+  if (!font->vhea || !font->maxp) {
+    return OTS_FAILURE_MSG("vhea or maxp table missing as needed by vmtx");
+  }
+
+  if (!ParseMetricsTable(font, &table, font->maxp->num_glyphs,
+                         &font->vhea->header, &vmtx->metrics)) {
+    return OTS_FAILURE_MSG("Failed to parse vmtx metrics");
+  }
+
+  return true;
+}
+
+bool ots_vmtx_should_serialise(Font *font) {
+  // vmtx should serialise when vhea is preserved.
+  return font->vmtx != NULL && font->vhea != NULL;
+}
+
+bool ots_vmtx_serialise(OTSStream *out, Font *font) {
+  if (!SerialiseMetricsTable(font, out, &font->vmtx->metrics)) {
+    return OTS_FAILURE_MSG("Failed to write vmtx metrics");
+  }
+  return true;
+}
+
+void ots_vmtx_reuse(Font *font, Font *other) {
+  font->vmtx = other->vmtx;
+  font->vmtx_reused = true;
+}
+
+void ots_vmtx_free(Font *font) {
+  delete font->vmtx;
+}
+
+}  // namespace ots
+
+#undef TABLE_NAME