OTS: Add DoNotDropColorBitmapTables() API.

trunk/src/cbdt.cc

Index: trunk/src/cbdt.cc
===================================================================
--- trunk/src/cbdt.cc	(revision 0)
+++ trunk/src/cbdt.cc	(working copy)
@@ -0,0 +1,41 @@
+// Copyright (c) 2014 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 "cbdt.h"
+
+// CBDT
+// https://color-emoji.googlecode.com/git/specification/v1.html
+// We don't support the table, but provide a way not to drop the table.
+
+namespace ots {
+
+extern bool g_drop_color_bitmap_tables;
+
+bool ots_cbdt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
+  if (g_drop_color_bitmap_tables) {
+    return OTS_FAILURE();
+  }
+
+  file->cbdt = new OpenTypeCBDT;
+  file->cbdt->data = data;
+  file->cbdt->length = length;
+  return true;
+}
+
+bool ots_cbdt_should_serialise(OpenTypeFile *file) {
+  return file->cbdt != NULL && file->cblc != NULL;
+}
+
+bool ots_cbdt_serialise(OTSStream *out, OpenTypeFile *file) {
+  if (!out->Write(file->cbdt->data, file->cbdt->length)) {
+    return OTS_FAILURE();
+  }
+  return true;
+}
+
+void ots_cbdt_free(OpenTypeFile *file) {
+  delete file->cbdt;
+}
+
+}  // namespace ots