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diff --git a/gfx/2d/NativeFontResourceDWrite.h b/gfx/2d/NativeFontResourceDWrite.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_gfx_NativeFontResourceDWrite_h
+#define mozilla_gfx_NativeFontResourceDWrite_h
+
+#include <dwrite.h>
+
+#include "2D.h"
+#include "mozilla/AlreadyAddRefed.h"
+
+namespace mozilla {
+namespace gfx {
+
+class NativeFontResourceDWrite final : public NativeFontResource
+{
+public:
+ MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(NativeFontResourceDWrite)
+ /**
+ * Creates a NativeFontResourceDWrite if data is valid. Note aFontData will be
+ * copied if required and so can be released after calling.
+ *
+ * @param aFontData the SFNT data.
+ * @param aDataLength length of data.
+ * @param aNeedsCairo whether the ScaledFont created needs a cairo scaled font
+ * @return Referenced NativeFontResourceDWrite or nullptr if invalid.
+ */
+ static already_AddRefed<NativeFontResourceDWrite>
+ Create(uint8_t *aFontData, uint32_t aDataLength, bool aNeedsCairo);
+
+ already_AddRefed<ScaledFont>
+ CreateScaledFont(uint32_t aIndex, Float aGlyphSize,
+ const uint8_t* aInstanceData, uint32_t aInstanceDataLength) final;
+
+private:
+ NativeFontResourceDWrite(IDWriteFactory *aFactory,
+ already_AddRefed<IDWriteFontFile> aFontFile,
+ DWRITE_FONT_FACE_TYPE aFaceType,
+ uint32_t aNumberOfFaces, bool aNeedsCairo)
+ : mFactory(aFactory), mFontFile(aFontFile), mFaceType(aFaceType)
+ , mNumberOfFaces(aNumberOfFaces), mNeedsCairo(aNeedsCairo)
+ {}
+
+ IDWriteFactory *mFactory;
+ RefPtr<IDWriteFontFile> mFontFile;
+ DWRITE_FONT_FACE_TYPE mFaceType;
+ uint32_t mNumberOfFaces;
+ bool mNeedsCairo;
+};
+
+} // gfx
+} // mozilla
+
+#endif // mozilla_gfx_NativeFontResourceDWrite_h