Add m-esr52 at 52.6.0

1 files changed, 56 insertions, 0 deletions

diff --git a/gfx/ots/src/hmtx.cc b/gfx/ots/src/hmtx.cc
new file mode 100644
index 000000000..667d1fe6f
--- /dev/null
+++ b/gfx/ots/src/hmtx.cc
@@ -0,0 +1,56 @@
+// 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 "hmtx.h"
+
+#include "hhea.h"
+#include "maxp.h"
+
+// hmtx - Horizontal Metrics
+// http://www.microsoft.com/typography/otspec/hmtx.htm
+
+#define TABLE_NAME "hmtx"
+
+namespace ots {
+
+bool ots_hmtx_parse(Font *font, const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+  OpenTypeHMTX *hmtx = new OpenTypeHMTX;
+  font->hmtx = hmtx;
+
+  if (!font->hhea || !font->maxp) {
+    return OTS_FAILURE_MSG("Missing hhea or maxp tables in font, needed by hmtx");
+  }
+
+  if (!ParseMetricsTable(font, &table, font->maxp->num_glyphs,
+                         &font->hhea->header, &hmtx->metrics)) {
+    return OTS_FAILURE_MSG("Failed to parse hmtx metrics");
+  }
+
+  return true;
+}
+
+bool ots_hmtx_should_serialise(Font *font) {
+  return font->hmtx != NULL;
+}
+
+bool ots_hmtx_serialise(OTSStream *out, Font *font) {
+  if (!SerialiseMetricsTable(font, out, &font->hmtx->metrics)) {
+    return OTS_FAILURE_MSG("Failed to serialise htmx metrics");
+  }
+  return true;
+}
+
+void ots_hmtx_reuse(Font *font, Font *other) {
+  font->hmtx = other->hmtx;
+  font->hmtx_reused = true;
+}
+
+void ots_hmtx_free(Font *font) {
+  delete font->hmtx;
+}
+
+}  // namespace ots
+
+#undef TABLE_NAME