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diff --git a/gfx/2d/SourceSurfaceSkia.h b/gfx/2d/SourceSurfaceSkia.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_SOURCESURFACESKIA_H_
+#define MOZILLA_GFX_SOURCESURFACESKIA_H_
+
+#include "2D.h"
+#include "mozilla/Mutex.h"
+#include "skia/include/core/SkRefCnt.h"
+
+class SkImage;
+class SkSurface;
+
+namespace mozilla {
+
+namespace gfx {
+
+class DrawTargetSkia;
+class SnapshotLock;
+
+class SourceSurfaceSkia : public DataSourceSurface {
+ public:
+ MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceSkia, override)
+
+ SourceSurfaceSkia();
+ virtual ~SourceSurfaceSkia();
+
+ SurfaceType GetType() const override { return SurfaceType::SKIA; }
+ IntSize GetSize() const override;
+ SurfaceFormat GetFormat() const override;
+
+ void GiveSurface(SkSurface* aSurface);
+
+ sk_sp<SkImage> GetImage(Maybe<MutexAutoLock>* aLock);
+
+ bool InitFromData(unsigned char* aData, const IntSize& aSize, int32_t aStride,
+ SurfaceFormat aFormat);
+
+ bool InitFromImage(const sk_sp<SkImage>& aImage,
+ SurfaceFormat aFormat = SurfaceFormat::UNKNOWN,
+ DrawTargetSkia* aOwner = nullptr);
+
+ already_AddRefed<SourceSurface> ExtractSubrect(const IntRect& aRect) override;
+
+ uint8_t* GetData() override;
+
+ /**
+ * The caller is responsible for ensuring aMappedSurface is not null.
+ */
+ bool Map(MapType, MappedSurface* aMappedSurface) override;
+
+ void Unmap() override;
+
+ int32_t Stride() override { return mStride; }
+
+ private:
+ friend class DrawTargetSkia;
+
+ void DrawTargetWillChange();
+
+ sk_sp<SkImage> mImage;
+ // This keeps a surface alive if needed because its DrawTarget has gone away.
+ sk_sp<SkSurface> mSurface;
+ SurfaceFormat mFormat;
+ IntSize mSize;
+ int32_t mStride;
+ Atomic<DrawTargetSkia*> mDrawTarget;
+ Mutex mChangeMutex MOZ_UNANNOTATED;
+ bool mIsMapped;
+};
+
+} // namespace gfx
+} // namespace mozilla
+
+#endif /* MOZILLA_GFX_SOURCESURFACESKIA_H_ */