Add support for kEmbeddedBitmapText_Flag to DirectWrite.

src/sfnt/SkOTTable_EBSC.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkOTTable_EBSC_DEFINED
+#define SkOTTable_EBSC_DEFINED
+
+#include "SkEndian.h"
+#include "SkOTTable_EBLC.h"
+#include "SkOTTableTypes.h"
+
+#pragma pack(push, 1)
+
+struct SkOTTableEmbeddedBitmapScaling {
+    static const SK_OT_CHAR TAG0 = 'E';
+    static const SK_OT_CHAR TAG1 = 'S';
+    static const SK_OT_CHAR TAG2 = 'B';
+    static const SK_OT_CHAR TAG3 = 'C';
+    static const SK_OT_ULONG TAG = SkOTTableTAG<SkOTTableEmbeddedBitmapScaling>::value;
+
+    SK_OT_Fixed version;
+    static const SK_OT_Fixed version_initial = SkTEndian_SwapBE32(0x00020000);
+
+    SK_OT_ULONG numSizes;
+
+    struct BitmapScaleTable {
+        SkOTTableEmbeddedBitmapLocation::SbitLineMetrics hori;
+        SkOTTableEmbeddedBitmapLocation::SbitLineMetrics vert;
+        SK_OT_BYTE ppemX; //target horizontal pixels per EM
+        SK_OT_BYTE ppemY; //target vertical pixels per EM
+        SK_OT_BYTE substitutePpemX; //use bitmaps of this size
+        SK_OT_BYTE substitutePpemY; //use bitmaps of this size
+    }; //bitmapScaleTable[numSizes];
+};
+
+#pragma pack(pop)
+
+#endif